Daikin RZQ71~125B7V3B Service Manual
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Daikin RZQ71~125B7V3B Service Manual

Daikin RZQ71~125B7V3B Service Manual

Sky-air inverter r-410a b series
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Table of Contents

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ESIE04-01
Service Manual
RZQ71~125B7V3B
Sky-Air Inverter R-410A B series

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Summary of Contents for Daikin RZQ71~125B7V3B

  • Page 1 ESIE04-01 Service Manual RZQ71~125B7V3B Sky-Air Inverter R-410A B series...

  • Page 3: System Outline

    ESIE04-01 Table of Contents Introduction About This Manual .................. i–i Combination Overview ................i–ii Precautions on handling new refrigerants..........i–iv Part 1 System Outline General Outline: Outdoor Units What Is in This Chapter? ................ 1–3 RZQ71: Outlook and dimensions ............1–4 RZQ100 and RZQ125: Outlook and dimensions ........
  • Page 4 ESIE04-01 Specifications What Is in This Chapter? ................. 1–43 RZQ71, RZQ100 and RZQ125 ..............1–44 FCQ ......................1–47 FFQ......................1–48 FBQ ......................1–49 FDQ ......................1–50 FHQ ......................1–51 FUQ ......................1–52 FAQ ......................1–53 Functional Diagrams What Is in This Chapter? ................. 1–55 Pair system .....................

  • Page 5: Table Of Contents

    ESIE04-01 Wiring Diagrams What Is in This Chapter? ................ 1–85 RZQ71B7V3B ..................1–86 RZQ100~125B7V3B ................1–87 FCQ35~60B7V1..................1–88 FCQ71~125B7V3B ................. 1–89 FFQ35~60BV1B..................1–90 FBQ35~60B7V1..................1–91 FBQ71B7V3B ..................1–92 FBQ100~125B7V3B ................1–93 6.10 FDQ125B7V3B ..................1–94 6.11 FHQ35~60BUV1 ..................1–95 6.12 FHQ71~125BUV1B.................
  • Page 6 ESIE04-01 Part 2 Functional Description General Functionality What Is in This Chapter? ................. 2–3 Functions of Thermistors ................. 2–4 Forced Operating Mode (Emergency Operation)........2–6 Outdoor Unit Identification Function ............2–8 Simulated Operation Function ..............2–9 Restart Standby ..................2–10 Automatic Restart ..................
  • Page 7 ESIE04-01 Part 3 Troubleshooting Troubleshooting What Is in This Chapter? ................ 3–3 General Troubleshooting Flowchart ............3–4 Overview of General Problems ............... 3–5 Procedure of Self-Diagnosis by Remote Controller ........ 3–24 Fault-diagnosis by Wired Remote Controller .......... 3–25 Fault-diagnosis by Wireless Remote Controller ........3–26 Overview of Error Codes.................
  • Page 8 ESIE04-01 Error Codes: Outdoor Units What Is in This Chapter? ................. 3–53 Actuation of Protection Device ............(E0) 3–54 Failure of Outdoor Unit PC Board ............(E1) 3–55 Abnormal High Pressure (Detected by the HPS) ......(E3) 3–56 Actuation of Low Pressure Sensor ..........(E4) 3–58 Compressor Motor Lock ..............(E5) 3–60...
  • Page 9 ESIE04-01 Part 4 Commissioning and Test Run Pre-Test Run Checks What Is in This Chapter? ................ 4–3 Test Run Checks ..................4–4 Setting the Wireless Remote Controller ..........4–5 Field settings What Is in This Chapter? ................ 4–9 How to Change the Field Settings with the Wired Remote Controller..4–10 How to Change the Field Settings with the Wireless Remote Controller ...................
  • Page 10 ESIE04-01 Part 5 Disassembly and Maintenance Disassembly and Maintenance: Outdoor Units What Is in This Chapter? ................. 5–3 RZQ71~125B7V3B .................. 5–4 Disassembly and Maintenance: Indoor Units What Is in This Chapter? ................. 5–17 FCQ35B7V1 ~ FCQ71B7V3B..............5–18 FCQ100~125B7V3B ................5–20 FBQ35~50B7V1..................

  • Page 11: About This Manual

    ESIE04-01 Introduction Part 0 Introduction About This Manual Target group This service manual is intended for and should only be used by qualified engineers. Purpose of this This service manual contains all the information you need to do the necessary repair and maintenance manual tasks for the Sky Air RZQ-series.
  • Page 12 Introduction ESIE04-01 Combination Overview Introduction In the tables in this section: “2” stands for twin combination. “3” stands for triple combination. “4“ double twin combination. “P” and “M” are allowed and guaranteed combinations, but they will not be officially mentioned as such in catalogues or databooks.
  • Page 13 ESIE04-01 Introduction Combination Matrix Possible indoor combination Simultaneous operation Outdoor models Twin Triple Double Twin 35-35 – – RZQ71B7V3B (KHRQ22M20TA7) 50-50 35-35-35 – RZQ100B7V3B (KHRQ22M20TA7) (KHRQ127H7) 60-60 50-50-50 35-35-35-35 RZQ125B7V3B (KHRQ22M20TA7) (KHRQ127H7) (3 x KHRQ22M20TA7) Notes: 1 Possible indoor types: FCQ35-60 FFQ35-60 FHQ35-60...
  • Page 14 Introduction ESIE04-01 Precautions on handling new refrigerants 1.3.1 Outline About Refrigerant Characteristics of new refrigerant, R410A R410A 1 Performance Almost the same performance as R22 and R407C. 2 Pressure Working pressure is approx. 1.4 times more than R22 and R407C. 3 Refrigerant composition Few problems in composition control, since it is a Quasi-azeotropic mixture refrigerant.
  • Page 15 ESIE04-01 Introduction Thermodynamic characteristic of R410A Temperature Steam pressure Density Specific heat at constant Specific enthalpy Specific entropy (kPa) (kg/m pressure (kJ/kgK) (kJ/kg) (kJ/KgK) Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor...
  • Page 16 Introduction ESIE04-01 1.3.2 Refrigerant Cylinders Cylinder The cylinder is painted refrigerant color (pink). specifications The cylinder valve is equipped with a siphon tube. Cylilinder Siphon tube Note: 1 Refrigerant can be charged in liquid state with cylinder in upright position. 2 Do not lay cylinder on its side during charging, since it causes refrigerant in gas state to enter the system.

  • Page 17: Service Tools

    ESIE04-01 Introduction 1.3.4 Service Tools R410A is used under higher working pressure, compared to previous refrigerants (R22,R407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other problems. Therefore, gauge manifolds and charge hoses that are used with a previous refrigerant (R22,R407C) can not be used for products that use new refrigerants.
  • Page 18 Introduction ESIE04-01 Copper tube material and R407C R410A thickness Pipe size Thickness Thickness Material Material tmmj tmmj φ6.4 φ9.5 φ12.7 φ15.9 φ19.1 1/2H * O: Soft (Annealed) H: Hard (Drawn) Flaring tool Flare gauge Specifications • Dimension A Nominal size Tube O.D.
  • Page 19 ESIE04-01 Introduction Differences • Change of dimension A Dimension A For class-1: R407C For class-2: R410A Conventional flaring tools can be used when the work process is changed. (change of work process) Previously, a pipe extension margin of 0 to 0.5mm was provided for flaring. For R410A air conditioners, perform pipe flaring with a pipe extension margin of 1.0 to 1.5 mm.
  • Page 20 Introduction ESIE04-01 Vacuum pump with check valve Vacuum pump adaptor (Reverse flow preventive vacuum adaptor) Specifications • Discharge speed Maximum degree of vacuum 50 l/min (50Hz) –100.7 kpa ( 5 torr – 755 mmHg) 60 l/min (60Hz) • Suction port UNF7/16-20(1/4 Flare) UNF1/2-20(5/16 Flare) with adaptor Differences •...
  • Page 21 ESIE04-01 Introduction Gauge manifold for R410A Specifications • High pressure gauge - 0.1 to 5.3 MPa (-76 cmHg to 53 kg/cm • Low pressure gauge - 0.1 to 3.8 MPa (-76 cmHg to 38 kg/cm 1/4" → 5/16" (2min → 2.5min) •...
  • Page 22 Introduction ESIE04-01 Charging cylinder Can not be used Specifications • Use weigher for refrigerant charge listed below to charge directly from refrigerant cylinder. Differences • The cylinder can not be used for mixed refrigerant since mixing ratio is changed during charging. When R410A is charged in liquid state using charging cylinder, foaming phenomenon is generated inside charging cylinder.
  • Page 23 ESIE04-01 Part 1 System Outline What is in this part? This part contains the following chapters: Chapter See page 1–General Outline: Outdoor Units 1–3 2–General Outline: Indoor Units 1–11 3–Specifications 1–43 4–Functional Diagrams 1–55 5–Switch Box Layout 1–73 6–Wiring Diagrams 1–85 7–PCB Layout 1–101...
  • Page 24 ESIE04-01 1–2 Part 1 – System Outline...

  • Page 25: What Is In This Chapter?

    ESIE04-01 General Outline: Outdoor Units Part 1 General Outline: Outdoor Units What Is in This Chapter? Introduction This chapter contains the following information on the outdoor units: Outlook and dimensions Installation and service space Components General outline This chapter contains the following general outlines: General outline See page 1.2–RZQ71: Outlook and dimensions...

  • Page 26: Rzq71: Outlook And Dimensions

    General Outline: Outdoor Units ESIE04-01 RZQ71: Outlook and dimensions Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions Installation and See page 1–8. service space 1–4 Part 1 – System Outline...
  • Page 27 ESIE04-01 General Outline: Outdoor Units Components The table below contains the different components of the unit. Component Gas pipe connection Liquid pipe connection Service port (inside the unit) Grounding terminal M5 (inside the switch box) Refrigerant piping intake Power supply wiring intake Control wiring intake Drain outlet Part 1 –...

  • Page 28: Rzq100 And Rzq125: Outlook And Dimensions

    General Outline: Outdoor Units ESIE04-01 RZQ100 and RZQ125: Outlook and dimensions Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions Installation and See page 1–8. service space 1–6 Part 1 – System Outline...
  • Page 29 ESIE04-01 General Outline: Outdoor Units Components The table below contains the different components of the unit. Component Gas pipe connection Liquid pipe connection Service port (inside the unit) Electronic connection and grounding terminal M5 (inside the switch box) Refrigerant piping intake Power supply wiring intake Control wiring intake Drain outlet...

  • Page 30: Rzq71, Rzq100 And Rzq125: Installation And Service Space

    General Outline: Outdoor Units ESIE04-01 RZQ71, RZQ100 and RZQ125: Installation and Service Space Non stacked The illustrations and table below show the required installation and service space (mm). The values in brackets are for the 100 and 125 class. Suction side obstacle In these cases, close the bottom of the installation frame to prevent discharged air from being...
  • Page 31 ESIE04-01 General Outline: Outdoor Units Stacked The illustration below shows the required installation and service space (mm). The values in brackets are for the 100 and 125 class. Do not stack more than one unit. ± 100 mm is required as the dimension for laying the upper outdoor unit’s drain pipe. Get the portion A sealed so that air from the outlet does not bypass.
  • Page 32 General Outline: Outdoor Units ESIE04-01 1–10 Part 1 – System Outline...

  • Page 33: What Is In This Chapter?

    ESIE04-01 General Outline: Indoor Units Part 1 General Outline: Indoor Units What Is in This Chapter? Introduction This chapter contains the following information on the indoor units: Outlook and dimensions Components General outline This chapter contains the following general outlines: General outline See page 2.2–FCQ35B7V1 ~ FCQ71B7V3B...

  • Page 34: Fcq35B7V1 ~ Fcq71B7V3B

    General Outline: Indoor Units ESIE04-01 FCQ35B7V1 ~ FCQ71B7V3B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–12 Part 1 – System Outline...
  • Page 35 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Liquid pipe connection Gas pipe connection Drain pipe connection Power supply connection Transmission wiring connection Air discharge grille Air suction grille Water supply intake Corner decoration cover Drain hose Part 1 –...

  • Page 36: Fcq100~125B7V3B

    General Outline: Indoor Units ESIE04-01 FCQ100~125B7V3B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–14 Part 1 – System Outline...
  • Page 37 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Liquid pipe connection Gas pipe connection Drain pipe connection Power supply connection Transmission wiring connection Air discharge grille Air suction grille Water supply intake Corner decoration cover Drain hose Part 1 –...

  • Page 38: Ffq35~60Bv1B

    General Outline: Indoor Units ESIE04-01 FFQ35~60BV1B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–16 Part 1 – System Outline...
  • Page 39 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Liquid pipe connection Gas pipe connection Drain pipe connection Power supply connection Remote control code and control wiring connection Air discharge grille Suction grille Drain hose Part 1 –...

  • Page 40: Fbq35B7V1 & Fbq50B7V1

    General Outline: Indoor Units ESIE04-01 FBQ35B7V1 & FBQ50B7V1 Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–18 Part 1 – System Outline...
  • Page 41 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Liquid pipe connection Gas pipe connection Drain pipe connection Remote controller wiring connection Power supply connection Drain hole Air filter Air suction side Air discharge side Nameplate Part 1 –...

  • Page 42: Fbq60B7V1 & Fbq71B7V3B

    General Outline: Indoor Units ESIE04-01 FBQ60B7V1 & FBQ71B7V3B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–20 Part 1 – System Outline...
  • Page 43 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Liquid pipe connection Gas pipe connection Drain pipe connection Remote controller wiring connection Power supply connection Drain hole Air filter Air suction side Air discharge side Nameplate Part 1 –...

  • Page 44: Fbq100B7V3B & Fbq125B7V3B

    General Outline: Indoor Units ESIE04-01 FBQ100B7V3B & FBQ125B7V3B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–22 Part 1 – System Outline...
  • Page 45 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Liquid pipe connection Gas pipe connection Drain pipe connection Remote controller wiring connection Power supply connection Drain hole Air filter Air suction side Air discharge side Nameplate Part 1 –...

  • Page 46: Fdq125B7V3B

    General Outline: Indoor Units ESIE04-01 FDQ125B7V3B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–24 Part 1 – System Outline...
  • Page 47 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Power supply intake Drain connection Gas pipe connection single union Liquid pipe connection single union Filter Part 1 – System Outline 1–25...

  • Page 48: Fhq35Buv1 & Fhq50Buv1

    General Outline: Indoor Units ESIE04-01 FHQ35BUV1 & FHQ50BUV1 Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–26 Part 1 – System Outline...
  • Page 49 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Air discharge grille Air suction grille Air filter Gas pipe connection Liquid pipe connection Drain pipe connection Earth terminal (Inside the electric components box) Suspention bracket Backward piping and wiring connection opening lid Upward piping and wiring connection opening lid...

  • Page 50: Fhq60Buv1 & Fhq71Buv1B

    General Outline: Indoor Units ESIE04-01 2.10 FHQ60BUV1 & FHQ71BUV1B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–28 Part 1 – System Outline...
  • Page 51 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Air discharge grille Air suction grille Air filter Gas pipe connection Liquid pipe connection Drain pipe connection Earth terminal (Inside the electric components box) Suspention bracket Backward piping and wiring connection opening lid Upward piping and wiring connection opening lid...

  • Page 52: Fhq100Buv1B

    General Outline: Indoor Units ESIE04-01 2.11 FHQ100BUV1B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–30 Part 1 – System Outline...
  • Page 53 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Air discharge grille Air suction grille Air filter Gas pipe connection Liquid pipe connection Drain pipe connection Earth terminal (Inside the electric components box) Suspention bracket Backward piping and wiring connection opening lid Upward piping and wiring connection opening lid...

  • Page 54: Fhq125Buv1B

    General Outline: Indoor Units ESIE04-01 2.12 FHQ125BUV1B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–32 Part 1 – System Outline...
  • Page 55 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Air discharge grille Air suction grille Air filter Gas pipe connection Liquid pipe connection Drain pipe connection Earth terminal (Inside the electric components box) Suspention bracket Backward piping and wiring connection opening lid Upward piping and wiring connection opening lid...

  • Page 56: Fuq71Buv1B

    General Outline: Indoor Units ESIE04-01 2.13 FUQ71BUV1B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–34 Part 1 – System Outline...
  • Page 57 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Liquid pipe connection Gas pipe connection Drain pipe connection Air outlet Air suction grille Corner decoration cover Right pipe/wiring connection Rear pipe/wiring connection Pipe through cover Accessory drain elbow Part 1 –...

  • Page 58: Fuq100~125Buv1B

    General Outline: Indoor Units ESIE04-01 2.14 FUQ100~125BUV1B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–36 Part 1 – System Outline...
  • Page 59 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Liquid pipe connection Gas pipe connection Drain pipe connection Air outlet Air suction grille Corner decoration cover Right pipe/wiring connection Rear pipe/wiring connection Pipe through cover Accessory drain elbow Part 1 –...

  • Page 60: Faq71Buv1B

    General Outline: Indoor Units ESIE04-01 2.15 FAQ71BUV1B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–38 Part 1 – System Outline...
  • Page 61 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Front panel Front grille Air outlet Gas pipe Liquid pipe Drain hose Grounding terminal Right side pipe connection hole Left side pipe connection hole Part 1 –...

  • Page 62: Faq100Buv1B

    General Outline: Indoor Units ESIE04-01 2.16 FAQ100BUV1B Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions 1–40 Part 1 – System Outline...
  • Page 63 ESIE04-01 General Outline: Indoor Units Components The table below contains the different components of the unit. Component Front grille Air filter Discharge outlet Gas piping connection Gas piping connection Drain piping connection Earth terminal Slit hole for right side piping connection Slit hole for left side piping connection Part 1 –...
  • Page 64 General Outline: Indoor Units ESIE04-01 1–42 Part 1 – System Outline...

  • Page 65: What Is In This Chapter?

    ESIE04-01 Specifications Part 1 Specifications What Is in This Chapter? Introduction This chapter contains the following information: Technical specifications Electrical specifications Electrical data Outdoor units This chapter contains the following specifications: Specifications See page 3.2–RZQ71, RZQ100 and RZQ125 1–44 Indoor units This chapter contains the following specifications: Specifications See page...

  • Page 66: Rzq71, Rzq100 And Rzq125

    Specifications ESIE04-01 RZQ71, RZQ100 and RZQ125 Technical The table below contains the technical specifications. specifications Specification RZQ71B7V3B RZQ100B7V3B RZQ125B7V3B Model 2YC63BXD JT100FCVD Type Hermetically sealed swing Hermetically sealed scroll compressor compressor Compressor Crankcase heater 33 W Motor output 1800 W 2200 W Speed Length...

  • Page 67: Indoor Units

    ESIE04-01 Specifications Electrical The table below contains the electrical specifications. specifications Specification RZQ71B7V3B RZQ100B7V3B RZQ125B7V3B Unit Name Phase Voltage 230V Frequency 50 Hz Wire connections for power supply See installation manual 4PW16864-1 Wire connections for connection with indoor See installation manual 4PW16864-1 Power supply intake Outdoor unit only Starting method...

  • Page 68: Specifications

    Specifications ESIE04-01 Unit combination Power supply Compressor FCQ125B7V3B RZQ125B7V3B 50-230 25.0 25.0 23.4 23.4 0.07+0.07 0.3+0.3 0.090 FCQ60B7V1x2 RZQ125B7V3B 50-230 25.2 25.2 23.4 23.4 0.07+0.07 0.3+0.3 0.045x2 0.6x2 FCQ50B7V1x3 RZQ125B7V3B 50-230 25.8 25.8 23.4 23.4 0.07+0.07 0.3+0.3 0.045x3 0.6x3 FCQ35B7V1x4 RZQ125B7V3B 50-230 26.4...

  • Page 69: Fcq

    ESIE04-01 Specifications Technical The table below contains the technical specifications. specifications Specification FCQ35B7V1 FCQ50B7V1 FCQ60B7V1 FCQ71B7V3B FCQ100B7V3B FCQ125B7V3B Heat exchanger Rows x stages x fin pitch 2x8x1.5 2x12x1.5 Face area 0.331 m² 0.497 m² Tube type HIXA diam. 7 HiXSS diam. 7 Fin type Rhombus Air flow rate cooling (high)

  • Page 70: Ffq

    Specifications ESIE04-01 Technical The table below contains the technical specifications. specifications Specification FFQ35BV1B FFQ50BV1B FFQ60BV1B Heat exchanger Rows x stages x fin pitch 2x10x1.5 Face area Tube type HiXSS diam. 7 Fin type Multi louver fin Air flow rate cooling (high) 10.0 m³/min 12.0 m³/min 15.0 m³/min...

  • Page 71: Fbq

    ESIE04-01 Specifications Technical The table below contains the technical specifications. specifications Specification FBQ35B7V1 FBQ50B7V1 FBQ60B7V1 FBQ71B7V3B FBQ100B7V3B FBQ125B7V3B Heat exchanger Rows x stages x fin pitch 3 x 14 x 1.75 Face area 0.132 m² 0.221 m² 0.338 m² Tube type HI-XA diam.

  • Page 72: Fdq

    Specifications ESIE04-01 Technical The table below contains the technical specifications. specifications Specification FDQ125B7V3B Heat exchanger Rows x stages x fin pitch 3 x 14 x 1.75 Face area 0.338 m² Tube type Hi-XSS diam. 7 Fin type Rhombus Air flow rate cooling (high) 43.0 m³/min Air flow rate cooling (low) 43.0 m³/min...

  • Page 73: Fhq

    ESIE04-01 Specifications Technical The table below contains the technical specifications. specifications Specification FHQ35BUV1B FHQ50BUV1B FHQ60BUV1B FHQ71BUV1B FHQ100BUV1B FHQ125BUV1B Heat exchanger Rows x stages x fin pitch 2 x 12 x 1.75 3 x 12 x 1.75 2 x 12 x 1.75 3 x 12 x 1.75 Face area 0.182 m²...

  • Page 74: Fuq

    Specifications ESIE04-01 Technical The table below contains the technical specifications. specifications Specification FUQ71BUV1B FUQ100BUV1B FUQ125BUV1B Heat exchanger Rows x stages x fin pitch 3 x 6 x 1.5 3 x 8 x 1.5 Face area 0.265 m² 0.353 m² Tube type N-Hix Fin type Multi louver...

  • Page 75: Faq

    ESIE04-01 Specifications Technical The table below contains the technical specifications. specifications Specification FAQ71BUV1B FAQ100BUV1B Heat exchanger Rows x stages x fin pitch 2 x 16 x 1.4 2 x 12 x 1.4 Face area 0.289 m² 0.332 m² Tube type Hi-XA N-Hix Fin type...
  • Page 76 Specifications ESIE04-01 1–54 Part 1 – System Outline...

  • Page 77: What Is In This Chapter?

    ESIE04-01 Functional Diagrams Part 1 Functional Diagrams What Is in This Chapter? Introduction This chapter contains the following information: Functional diagrams Pipe connection diameters. Functional This chapter contains the following functional diagrams: diagrams Functional diagram See page 4.2–Pair system 1–56 4.3–Twin System 1–58 4.4–Triple System...

  • Page 78: Pair System

    Functional Diagrams ESIE04-01 Pair system RZQ71 Liquid piping Gas piping Outdoor unit Indoor unit Heating Cooling 2b & 3 1–56 Part 1 – System Outline...
  • Page 79 ESIE04-01 Functional Diagrams RZQ100~125 Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling 2b & 3 Part 1 – System Outline 1–57...

  • Page 80: Twin System

    Functional Diagrams ESIE04-01 Twin System RZQ71 Indoor unit Liquid piping Gas piping Outdoor unit Heating Cooling 2b & 3 NOTE: The press between the branch and the indoor units Indoor unit should have the same size as the indoor connections. 1–58 Part 1 –...
  • Page 81 ESIE04-01 Functional Diagrams RZQ100~125 Indoor unit Liquid piping Gas piping Outdoor unit Heating Cooling 2b & 3 Indoor unit NOTE: The press between the branch and the indoor units should have the same size as the indoor connections. Part 1 – System Outline 1–59...

  • Page 82: Triple System

    Functional Diagrams ESIE04-01 Triple System RZQ100~125 Indoor unit Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling 2b & 3 NOTE: The press between the branch and the indoor units should have the same size as the indoor connections. Indoor unit 1–60 Part 1 –...

  • Page 83: Double Twin System

    ESIE04-01 Functional Diagrams Double Twin System RZQ100~125 Indoor unit Indoor unit Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling 2b & 3 Indoor unit NOTE: The press between the branch and the indoor units should have the same size as the indoor connections. Part 1 –...

  • Page 84: Indoor Piping

    Functional Diagrams ESIE04-01 Indoor piping Liquid piping To outdoor unit Gas piping Indoor unit FHQ, FUQ, FAQ Liquid piping To outdoor unit Gas piping Indoor unit 1–62 Part 1 – System Outline...
  • Page 85 ESIE04-01 Functional Diagrams FCQ, FBQ, FDQ Heating Cooling Liquid piping Gas piping Indoor unit Part 1 – System Outline 1–63...

  • Page 86: Pipe Connection Diameters

    Functional Diagrams ESIE04-01 Pipe connection diameters Outdoor units The table below contains the refrigerant pipe connection diameters. ∅ Gas pipe (flare) ∅ Liquid pipe (flare) Model RZQ71B7V3B 15.9 mm 9.52 mm RZQ100B7V3B RZQ125B7V3B Indoor units The table below contains the refrigerant pipe connection diameters. ∅...

  • Page 87: Re-Using Existing Field Piping

    Use the supplied flare nut. Existing piping work for new air conditioner Notes: Oil contamination can be checked using the Daikin “Oil Checker Card”. Caution: If copper piping is corroded, existing piping re-use is not allowed. Single side thermal insulation is not allowed for re-use.
  • Page 88 Functional Diagrams ESIE04-01 Precautions on Do not allow anything other than the designated refrigerant to get mixed into the freezing cycle (air, refrigerant piping moisture,... ). If any refrigerant gas leaks while working on the unit, ventilate the room thoroughly immediately.
  • Page 89 φ 6.4 φ 9.5 φ 12.7 RZQ71~125B7V3B Not using the standard pipe size may result in capacity decrease. It is up to the installer to judge on this phenomenon carefully in function of the complete installation. Part 1 – System Outline...
  • Page 90 Functional Diagrams ESIE04-01 Allowable pipe When re-using existing piping, refer to below table for allowable piping length and heigth difference length and heigth (figures in brackets are equivalent lengths). difference Model RZQ-B7 Liquid pipe size Maximum allowable piping length (*) Pair: L1 size-down 10 m (15 m)
  • Page 91 ESIE04-01 Functional Diagrams Too high tightening force Caution for flare Refer to below table for correct flare dimensions and tightening torques. connections may cause refrigerant leak because of flare cracking: Flare nut A dimensions for Piping size tightening torque processing flares (mm) Flare shape 14.2~17.2 N·m Ø...
  • Page 92 Functional Diagrams ESIE04-01 1–70 Part 1 – System Outline...

  • Page 93: Piping Components

    ESIE04-01 Part 1 Piping Components Components The table below contains the different components of the functional diagrams. Component Function / remark Flare connection See pipe connection diameter. Liquid stop valve The liquid stop valve is used as shut-off valve in case of a pump-down. Liquid stop valve with service port Gas stop valve with...
  • Page 94 ESIE04-01 1–72 Part 1 – System Outline...

  • Page 95: What Is In This Chapter?

    ESIE04-01 Switch Box Layout Part 1 Switch Box Layout What Is in This Chapter? Introduction This chapter shows the switch box components. Outdoor units This chapter contains the following switch box layouts: Switch box layout See page 5.2–RZQ71B7V3B 1–74 5.3–RZQ100B7V3B 1–75 Indoor units This chapter contains the following switch box layouts:...

  • Page 96: Rzq71B7V3B

    Switch Box Layout ESIE04-01 RZQ71B7V3B The illustration below shows the switch box layout: Item Description Printed circuit board (control) Printed circuit board (inverter) Terminal strip 1–74 Part 1 – System Outline...

  • Page 97: Rzq100B7V3B

    ESIE04-01 Switch Box Layout RZQ100B7V3B The illustration below shows the switch box layout: Item Description Printed circuit board (control) Printed circuit board (inverter) Terminal strip Part 1 – System Outline 1–75...

  • Page 98: Fcq35B7V1 ~ Fcq71B7V3B

    Switch Box Layout ESIE04-01 FCQ35B7V1 ~ FCQ71B7V3B The illustration below shows the switch box layout:. Item Description Printed circuit board Transformer Fan motor capacitor Terminal strip (for remote control P1/P2) Terminal strip (interconnection wiring) 1–76 Part 1 – System Outline...

  • Page 99: Fcq100~125B7V3B

    ESIE04-01 Switch Box Layout FCQ100~125B7V3B The illustration below shows the switch box layout: Item Description Printed circuit board Transformer Fan motor capacitor Terminal strip (for remote control P1/P2) Terminal strip (interconnection wiring) Part 1 – System Outline 1–77...

  • Page 100: Ffq35~60Bv1B

    Switch Box Layout ESIE04-01 FFQ35~60BV1B The illustration below shows the switch box layout: X17A Item Description Printed circuit board Transformer Fan motor capacitor Terminal strip (for remote control P1/P2) Terminal strip (interconnection wiring) 1–78 Part 1 – System Outline...

  • Page 101: Fbq35B7V1 ~ Fbq125B7V3B

    ESIE04-01 Switch Box Layout FBQ35B7V1 ~ FBQ125B7V3B The illustration below shows the switch box layout:. Item Description Printed circuit board Transformer Fan motor capacitor Terminal strip (for remote control P1/P2) Terminal strip (interconnection wiring) Part 1 – System Outline 1–79...

  • Page 102: Fdq125B7V3B

    Switch Box Layout ESIE04-01 FDQ125B7V3B The illustration below shows the switch box layout: Item Description Printed circuit board Transformer Fan motor capacitor Terminal strip (for remote control P1/P2) Terminal strip (interconnection wiring) 1–80 Part 1 – System Outline...

  • Page 103: Fhq35Buv1 ~ Fhq125Buv1B

    ESIE04-01 Switch Box Layout FHQ35BUV1 ~ FHQ125BUV1B The illustration below shows the switch box layout: Item Description Printed circuit board Transformer Fan motor capacitor Terminal strip (for remote control P1/P2) Terminal strip (interconnection wiring) Part 1 – System Outline 1–81...

  • Page 104: Fuq71~125Buv1B

    Switch Box Layout ESIE04-01 5.10 FUQ71~125BUV1B The illustration below shows the switch box layout: Item Description Printed circuit board Transformer Fan motor capacitor Terminal strip (for remote control P1/P2) Terminal strip (interconnection wiring) 1–82 Part 1 – System Outline...

  • Page 105: Faq71Buv1B

    ESIE04-01 Switch Box Layout 5.11 FAQ71BUV1B The illustration below shows the switch box layout: Item Description Printed circuit board Terminal strip (for remote control P1/P2, F1/F2, T1/T2) Terminal strip (interconnection wiring) Part 1 – System Outline 1–83...

  • Page 106: Faq100Buv1B

    Switch Box Layout ESIE04-01 5.12 FAQ100BUV1B The illustration below shows the switch box layout: Item Description Printed circuit board Transformer Fan motor capacitor Terminal strip (for remote control P1/P2) Terminal strip (interconnection wiring) 1–84 Part 1 – System Outline...

  • Page 107: Wiring Diagrams

    ESIE04-01 Wiring Diagrams Part 1 Wiring Diagrams What Is in This Chapter? Introduction This chapter contains the wiring diagrams of the outdoor and indoor units. Outdoor units: This chapter contains the following wiring diagrams: Wiring diagram See page 6.2–RZQ71B7V3B 1–86 6.3–RZQ100~125B7V3B 1–87 Indoor units:...

  • Page 108: Rzq71B7V3B

    Wiring Diagrams ESIE04-01 RZQ71B7V3B Wiring diagram The illustration below shows the wiring diagram of the unit. 1–86 Part 1 – System Outline...

  • Page 109: Rzq100~125B7V3B

    ESIE04-01 Wiring Diagrams RZQ100~125B7V3B Wiring diagram The illustration below shows the wiring diagram of the unit. Part 1 – System Outline 1–87...

  • Page 110: Fcq35~60B7V1

    Wiring Diagrams ESIE04-01 FCQ35~60B7V1 Wiring diagram The illustration below shows the wiring diagram of the unit. 1–88 Part 1 – System Outline...

  • Page 111: Fcq71~125B7V3B

    ESIE04-01 Wiring Diagrams FCQ71~125B7V3B Wiring diagram The illustration below shows the wiring diagram of the unit. Part 1 – System Outline 1–89...

  • Page 112: Ffq35~60Bv1B

    Wiring Diagrams ESIE04-01 FFQ35~60BV1B Wiring diagram The illustration below shows the wiring diagram of the unit. 1–90 Part 1 – System Outline...

  • Page 113: Fbq35~60B7V1

    ESIE04-01 Wiring Diagrams FBQ35~60B7V1 Wiring diagram The illustration below shows the wiring diagram of the unit. Part 1 – System Outline 1–91...

  • Page 114: Fbq71B7V3B

    Wiring Diagrams ESIE04-01 FBQ71B7V3B Wiring diagram The illustration below shows the wiring diagram of the unit. 1–92 Part 1 – System Outline...

  • Page 115: Fbq100~125B7V3B

    ESIE04-01 Wiring Diagrams FBQ100~125B7V3B Wiring diagram The illustration below shows the wiring diagram of the unit. Part 1 – System Outline 1–93...

  • Page 116: Fdq125B7V3B

    Wiring Diagrams ESIE04-01 6.10 FDQ125B7V3B Wiring diagram The illustration below shows the wiring diagram of the unit. 1–94 Part 1 – System Outline...

  • Page 117: Fhq35~60Buv1

    ESIE04-01 Wiring Diagrams 6.11 FHQ35~60BUV1 Wiring diagram The illustration below shows the wiring diagram of the unit. Part 1 – System Outline 1–95...

  • Page 118: Fhq71~125Buv1B

    Wiring Diagrams ESIE04-01 6.12 FHQ71~125BUV1B Wiring diagram The illustration below shows the wiring diagram of the unit. 1–96 Part 1 – System Outline...

  • Page 119: Fuq71~125Buv1B

    ESIE04-01 Wiring Diagrams 6.13 FUQ71~125BUV1B Wiring diagram The illustration below shows the wiring diagram of the unit. Part 1 – System Outline 1–97...

  • Page 120: Faq71Buv1B

    Wiring Diagrams ESIE04-01 6.14 FAQ71BUV1B Wiring diagram The illustration below shows the wiring diagram of the unit. 1–98 Part 1 – System Outline...

  • Page 121: Faq100Buv1B

    ESIE04-01 Wiring Diagrams 6.15 FAQ100BUV1B Wiring diagram The illustration below shows the wiring diagram of the unit. Part 1 – System Outline 1–99...
  • Page 122 Wiring Diagrams ESIE04-01 1–100 Part 1 – System Outline...

  • Page 123: Pcb Layout

    ESIE04-01 PCB Layout Part 1 PCB Layout What Is in This Chapter? Introduction This chapter contains the following information: It describes which unit uses which PCB types It shows the PCB connectors. Outdoor units This chapter contains the following PCB layouts: PCB layout See page 7.2–RZQ71B7V3B...

  • Page 124: Rzq71B7V3B

    PCB Layout ESIE04-01 RZQ71B7V3B Control PCB The illustration below shows the PCB connectors. X64A X26A X18A X17A X19A X20A X12A X77A X22A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip connector X205A on inverter PCB For optional PCB KRP58M51 X12A Expansion valve...
  • Page 125 ESIE04-01 PCB Layout Inverter PCB The illustration below shows the PCB connectors. X60A X201A X205A X206A X207A Connectors The table below describes the PCB connectors. Connector Connected to Description X60A S1PH High pressure switch X201A Compressor motor X205A X3A on control X206A Fan motor X207A...

  • Page 126: Rzq100B7V3B

    PCB Layout ESIE04-01 RZQ100B7V3B Control PCB The illustration below shows the PCB connectors. X64A X26A X18A X17A X19A X20A X12A X77A X28A X25A X22A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip connector X205A on inverter PCB For optional PCB KRP58M51 X12A...
  • Page 127 ESIE04-01 PCB Layout Inverter PCB (A2P) The illustration below shows the PCB connectors. X60A X205A X206A X207A Connectors The table below describes the PCB connectors. Connector Connected to Description X60A S1PH High pressure switch (U, V, W, N) Compressor motor X205A X3A on control X206A...

  • Page 128: Fcq35~60B7V1

    PCB Layout ESIE04-01 FCQ35~60B7V1 The illustration below shows the PCB connectors. X20A X27A X11A X10A X33A X19A X60A X61A X35A X24A X15A X25A X36A X40A X17A X18A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A Transformer secondary side X11A...

  • Page 129: Fcq71~125B7V3B

    ESIE04-01 PCB Layout FCQ71~125B7V3B The illustration below shows the PCB connectors. X27A X11A X11A X10A X33A X19A X60A X61A X35A X20A X24A X15A X18A X36A X40A X25A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A Transformer secondary side X11A...

  • Page 130: Ffq35~60Bv1B

    PCB Layout ESIE04-01 FFQ35~60BV1B The illustration below shows the PCB connectors. X27A X11A X10A X33A X60A X61A X19A X20A X35A X24A X15A X25A X36A X40A X17A X18A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A Transformer secondary side X11A...

  • Page 131: Fbq35~60B7V1

    ESIE04-01 PCB Layout FBQ35~60B7V1 The illustration below shows the PCB connectors. X61A X60A X33A X11A X25A X27A X15A X18A X19A X21A X17A X10A X35A X40A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A Transformer secondary side X11A...

  • Page 132: Fbq100~125B7V3B

    PCB Layout ESIE04-01 FBQ100~125B7V3B The illustration below shows the PCB connectors. X61A X60A X33A X11A X25A X27A X15A X18A X21A X19A X10A X40A X35A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A Transformer secondary side X11A...

  • Page 133: Fdq125B7V3B

    ESIE04-01 PCB Layout FDQ125B7V3B The illustration below shows the PCB connectors. X61A X33A X11A X27A X60A X31A X18A X19A X21A X10A X40A X35A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A Transformer secondary side X11A Transformer primary side...

  • Page 134: Fhq35~60Buv1

    PCB Layout ESIE04-01 7.10 FHQ35~60BUV1 The illustration below shows the PCB connectors. X61A X60A X33A X11A X27A X14A X15A X40A X20A X23A X29A X18A X19A X25A X17A X35A X10A X5A X24A X26A Connectors The table below describes the PCB connectors. Connector Connected to Description...

  • Page 135: Fhq71~125Buv1B

    ESIE04-01 PCB Layout 7.11 FHQ71~125BUV1B The illustration below shows the PCB connectors. X61A X60A X33A X11A X27A X14A X15A X40A X20A X29A X18A X25A X19A X35A X10A X5A X24A X26A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A...

  • Page 136: Fuq71~125Buv1B

    PCB Layout ESIE04-01 7.12 FUQ71~125BUV1B The illustration below shows the PCB connectors. X61A X60A X11A X27A X14A X15A X20A X29A X18A X25A X19A X35A X10A X5A X24A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A Transformer secondary side X11A...

  • Page 137: Faq71Buv1B

    ESIE04-01 PCB Layout 7.13 FAQ71BUV1B The illustration below shows the PCB connectors. X27A X20A X30A X36A X35A X18A X19A X15A X24A Connectors The table below describes the PCB connectors. Connector Connected to Description X15A Connector float switch X18A Coil thermistor (liquid) X19A Air thermistor X20A...

  • Page 138: Faq100Buv1B

    PCB Layout ESIE04-01 7.14 FAQ100BUV1B The illustration below shows the PCB connectors. X61A X60A X27A X11A X19A X35A X14A X15A X24A X25A X29A X98A X20A X10A X26A X18A Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip for P1/P2 X10A X2A on A2P...

  • Page 139: Functional Description

    ESIE04-01 Part 2 Functional Description What is in this part? This part contains information on the functions used to control the system. Understanding these functions is vital when diagnosing a malfunction that is related to the functional control. Overview This part contains the following chapters: Chapter See page 1–General Functionality...
  • Page 140 ESIE04-01 2–2 Part 2 – Functional Description...

  • Page 141: What Is In This Chapter

    ESIE04-01 General Functionality Part 2 General Functionality What Is in This Chapter? Introduction This chapter will explain all functions not related to the compressor frequency control, outdoor unit fan control and expansion valve control. These functions have been programmed to ensure the unit's reliability and lifetime, enable the operation in case of malfunction, or increase the customer's comfort.

  • Page 142: Functions Of Thermistors

    General Functionality ESIE04-01 Functions of Thermistors Locating the thermistors Remark Sensor R3T on indoor coil of FCQ35~60B7V1, FFQ35~60BV1, FBQ35~60B7V1 & FHQ35~60BUV1 is not used when the indoor units are connected to RZQ outdoor units. Functions of the thermistors Ther- Wiring Location Mode Function...
  • Page 143 ESIE04-01 General Functionality Ther- Wiring Location Mode Function mistor symbol Outdoor Cooling Outdoor fan speed control ambient PMV control Pressure difference control Overall current protection control Preheating operation control (RZQ71) Heating Defrost control PMV control Forced thermostat OFF Overall current protection control Preheating operation control (RZQ71) Discharge Cooling...

  • Page 144: Forced Operating Mode (Emergency Operation)

    General Functionality ESIE04-01 Forced Operating Mode (Emergency Operation) Purpose The table below describes the purpose of the forced operating mode. If... Then... R/C is defective Forced operating mode can be used to go to cooling or heat- ing. In forced operating mode, the compressor is forced to Indoor PCB is defective operate until the defective indoor or outdoor PCB is back Outdoor PCB is defective...
  • Page 145 ESIE04-01 General Functionality Step Action Switch ON the emergency switch on the outdoor PCB. Set the emergency switch on the outdoor PCB to the forced mode you prefer (Cooling or Heating). Turn ON the power supply. Active components Component Forced cooling Forced heating Forced defrosting Compressor...

  • Page 146: Outdoor Unit Identification Function

    General Functionality ESIE04-01 Outdoor Unit Identification Function Purpose The purpose of the outdoor unit identification function is to enable the indoor unit to automatically determine which operating mode has to be set in function of the type of connected outdoor unit (c/o or h/p).

  • Page 147: Simulated Operation Function

    ESIE04-01 General Functionality Simulated Operation Function Outline When a malfunction on one of the below thermistors occurs, operation will continue while displaying the applicable alarm on the remote-controller. Fin thermistor malfunction is only displayed when pressing the "Inspection" button on the remote-controller. Sensors Outside temperature thermistor Outdoor heat exchanger thermistor...

  • Page 148: Restart Standby

    General Functionality ESIE04-01 Restart Standby Outline To prevent the compressor from frequently turning ON and OFF and allow pressure equalization, forced thermostat OFF will be conducted for 3 minutes after compressor stopping (compressor guard timer). Graph Restart standby Thermostat OFF complete Compressor Moves to “Stop”...

  • Page 149: Automatic Restart

    ESIE04-01 General Functionality Automatic Restart Purpose The purpose of the auto-restart function is to automatically resume the same operating mode as when the unit was operating when the power supply is restored after a power failure. Do not use the "Automatic Restart" function to daily start/stop the unit. Precautions when When you have to turn OFF the power supply in order to carry out maintenance, make sure to turn turning OFF power...

  • Page 150: Using Conditions For Remote Controller Thermostat

    General Functionality ESIE04-01 Using Conditions for Remote Controller Thermostat Applicable The remote control thermostat is only available in wired remote controls. Method Unlike with VRV units, the remote control sensor is standard disabled for sky-air units. The use of the remote control sensor can be enabled by changing field setting 10(20)-2-02 to 10(20)-2-01.

  • Page 151: Forced Thermostat Off

    ESIE04-01 General Functionality Forced Thermostat OFF Outline The unit will perform the forced thermostat off function in following conditions: Condition 1 Thermostat off due to freeze-up prevention. (cooling) Prevent the indoor unit heat exchanger from freezing in cooling operation when one of the below conditions is applicable: Indoor unit heat exchanger temperature <...

  • Page 152: Test Run Control

    General Functionality ESIE04-01 1.10 Test run control Purpose When operating the RZQ units for the first time after installation, the unit will - depending on the selected operation mode - perform a test run operation first. Situation 1 Cooling - first operation after installation in "Cooling mode" Cooling thermostat Cooling operation in Normal cooling...

  • Page 153: 4-Way Valve Control

    ESIE04-01 General Functionality 1.11 4-way Valve Control Purpose The purpose of the 4-way valve control is to control how the superheated refrigerant passes through the 4-way valve. The 4-way valve control carries out the changeover switching of the 4-way valve. This changeover switching is only carried out during operation, because a certain pressure difference is required to move the internal cylinder.

  • Page 154: Pump Down Residual Operation

    General Functionality ESIE04-01 1.12 Pump Down Residual Operation Outline The unit will conduct a pump down residual operation after each compressor stop command. Purpose of this function is to collect the refrigerant in the liquid receiver and outdoor heat exchanger in order to prevent liquid refrigerant from remaining in the indoor heat exchanger.

  • Page 155: Pump Down Operation

    ESIE04-01 General Functionality 1.13 Pump Down Operation Outline Whenever the units need to be moved or removed, perform a pump-down operation before disconnecting the field piping. By performing a pump-down operation, all of the refrigerant will be collected in the outdoor unit. Procedure Procedure Precautions...

  • Page 156: Defrost Operation

    General Functionality ESIE04-01 1.14 Defrost Operation Outline When the unit is operating in heating mode, a defrost operation will be conducted in order to avoid ice formation on the outdoor unit heat exchanger. Defrost starting Defrost will start when the following conditions have been realized: conditions Integrated compressor running time is 25 minutes or more since the completion of the previous defrost operation.
  • Page 157 ESIE04-01 General Functionality Defrost control Defrosting complete Defrosting start Previous control A Hz B Hz Compressor C Hz 4-way valve 150 pls 480 pls Motorized valve (wet protection control) 0 pls (5~60 seconds) 0 pls (15 seconds) Outdoor unit fan Indoor fan RZQ71 RZQ100&125...

  • Page 158: Freeze Prevention Function

    General Functionality ESIE04-01 1.15 Freeze Prevention Function Purpose In order to avoid formation of ice on the indoor unit heat exchanger in cooling and dry mode, the system automatically starts up a freeze prevention cycle when a number of specific conditions are fulfilled.

  • Page 159: Pmv Control

    ESIE04-01 General Functionality 1.16 PMV Control Outline When the automatic mode is selected on the remote-controller, the unit will automatically activate the PMV control. The PMV index is a calculated average comfort level. Refer to ISO 7730 for details. Function An optimized indoor temperature will be calculated using the following inputs: Outdoor air temperature Indoor air temperature...

  • Page 160: Preheating Operation Control

    General Functionality ESIE04-01 1.17 Preheating Operation Control Applicable units RZQ71 Outline After the compressor has been turned off, the preheating operation will be activated in order to avoid refrigerant from dissolving in the compressor oil. Trigger conditions Power supply ON to First operation 60 minutes or more elapsed after compressor stop Starting conditions &...

  • Page 161: Crankcase Heater Control

    ESIE04-01 General Functionality 1.18 Crankcase Heater Control Applicable units RZQ100 & 125 Outline After the compressor has been turned off, the crankcase heater control will be activated in order to avoid refrigerant from dissolving in the compressor oil. Trigger conditions 70°C 75°C Discharge pipe temperature...
  • Page 162 General Functionality ESIE04-01 2–24 Part 2 – Functional Description...

  • Page 163: Indoor Unit Functional Concept

    ESIE04-01 Indoor Unit Functional Concept Part 2 Indoor Unit Functional Concept What Is in This Chapter? Introduction This chapter will explain more details about the various functions that are programmed for the Sky-Air R410A inverter indoor units. Overview This chapter contains the following topics: Topic See page 2.2–Thermostat Control...

  • Page 164: Thermostat Control

    Indoor Unit Functional Concept ESIE04-01 Thermostat Control Purpose Based on the information received from the air return sensor, the thermostat control will decide the required operation status of the system. Thermostat control Cooling mode: Set point Thermostat ON –0.5 K +1 K Thermostat OFF Heating mode:...

  • Page 165: Drain Pump Control

    ESIE04-01 Indoor Unit Functional Concept Drain Pump Control Purpose Control the water draining from the drain pan. Starting conditions The drain pump control starts the drain pump motor when one of the following conditions is fulfilled: Cooling operation is activated Abnormal high water level is detected in the drain pan Normal control In normal control, the drain pump is turned ON at compressor starting and turned OFF 5 minutes after...
  • Page 166 Indoor Unit Functional Concept ESIE04-01 Float switch 1 The thermostat is immediately turned OFF. activation during 2 The drain pump continues to operate for minimum 10 minutes (even if abnormality is solved within thermostat ON the 10 minutes). 3 If the float switch closes again within 80 seconds, cooling operation can restart within the 10 minutes recovery period.

  • Page 167: Condensation Avoidance Control

    ESIE04-01 Indoor Unit Functional Concept Condensation Avoidance Control Purpose Avoid condensation on the swing flap when the most downward position of the swing flap (position 4) is selected on the remote controller. Applicable units This function is applicable for the FHQ units only. Method The condensation avoidance control will function in the following operating modes: Cooling (automatic)

  • Page 168: Draft Avoidance Control 1

    Indoor Unit Functional Concept ESIE04-01 Draft Avoidance Control 1 Purpose Avoid draft for the customer by delaying transfer of the flap to the Po0 (horizontal) position for a certain amount of time when defrosting and in heating thermostat OFF. Heating thermostat The time chart below illustrates the draft avoidance control 1 in heating thermostat OFF.

  • Page 169: Draft Avoidance Control

    ESIE04-01 Indoor Unit Functional Concept Draft Avoidance Control 2 Purpose The purpose of the draft avoidance control 2 is to avoid draft when the flap is moving. Starting conditions The draft avoidance control 2 is activated when: Hot start is finished, or Cold air prevention control is finished.

  • Page 170: Fan And Flap Operations

    Indoor Unit Functional Concept ESIE04-01 Fan and Flap Operations Cooling operation The table below contains the fan and flap operations. Function In… Flap (FCQ and Flap (FAQ) Remote control FHQ) indication Thermostat ON Swing operation Swing Swing Swing in Dry Keep Airflow direction setting Set position Set position...

  • Page 171: Indoor Unit Fan Control

    ESIE04-01 Indoor Unit Functional Concept Indoor unit fan control Outline During compressor start and stop control, the indoor fan will receive instruction from the outdoor unit in order to protect the compressor from receiving liquid and to assure a smooth compressor start up: Indoor fan control before compressor stop Indoor fan control during compressor stop Indoor fan control before compressor startup...
  • Page 172 Indoor Unit Functional Concept ESIE04-01 At compressor In cooling: The indoor fan is operated at low speed until the low-pressure value reaches 6 bar. startup In heating: Hot startup controlWhen performing a startup, or after the defrosting cycle has been completed, the indoor fan will be controlled as to prevent cold air draft and secure the starting performance (quick pressure build-up).

  • Page 173: Outdoor Unit Functional Concept

    ESIE04-01 Outdoor Unit Functional Concept Part 2 Outdoor Unit Functional Concept What Is in This Chapter? Introduction This chapter will explain more details about the various functions that are programmed for the sky-air R410A inverter outdoor units. Overview This chapter contains the following topics: Topic See page 3.2–Function Outline...

  • Page 174: Function Outline

    Outdoor Unit Functional Concept ESIE04-01 Function Outline Introduction This chapter will show an overview of all applicable functions in cooling and heating mode. Content Topic See page 3.2.1–Function Outline in Cooling Mode 2–37 3.2.2–Function Outline in Heating Mode 2–38 2–36 Part 2 –...
  • Page 175 ESIE04-01 Outdoor Unit Functional Concept 3.2.1 Function Outline in Cooling Mode Flow chart Cooling/Dry operation Power supply ON Initialize motorized valve Initialize microcomputer Stopping Crank case heater control Preheating operation control Remote controller operation judgement Cooling/Dry Emergency Operation mode judgement Emergency Heating operation...
  • Page 176 Outdoor Unit Functional Concept ESIE04-01 3.2.2 Function Outline in Heating Mode Flow chart Heating operation Power supply ON Initialize motorized valve Initialize microcomputer Stopping Crank case heater control Preheating operation control Remote controller ON operation judgement Cooling/Dry Emergency Operation mode judgement Emergency Heating...

  • Page 177: Frequency Regulating Functions

    ESIE04-01 Outdoor Unit Functional Concept Frequency Regulating Functions Introduction One of the main functions of the µ-controller will be the control of the compressor frequency. The next chapter will explain how the compressor frequency is determined. Content Topic See page 3.3.1–Starting Frequency Control 2–40 3.3.2–General Frequency Control...

  • Page 178: Starting Frequency Control

    Outdoor Unit Functional Concept ESIE04-01 3.3.1 Starting Frequency Control Outline The inverter compressor will start up with a limited fixed frequency value for a specified period of time in order to prevent liquid back to the compressor, and to limit the starting current. General The normal starting control time is 2~3 minutes.
  • Page 179 ESIE04-01 Outdoor Unit Functional Concept Cooling Pressure Pressure Starting equalizing equalizing control start complete complete Pressure equalizing control before compressor start Starting control RZQ71: 73 Hz RZQ100/125: 107 Hz Compressor RZQ71: 480 pls RZQ100/125: Motorized valve 65 pls 4 way valve Previously OFF Previously ON Ta ≤...
  • Page 180 Outdoor Unit Functional Concept ESIE04-01 Heating Pressure Pressure Starting equalizing equalizing control start complete complete Pressure equalizing control before compressor start Starting control RZQ71: 73 Hz RZQ100 &125: 107 Hz Compressor RZQ71: 480 pls RZQ100/125: Motorized valve 65 pls 4 way valve Previously ON Previously OFF Ta >...

  • Page 181: General Frequency Control

    ESIE04-01 Outdoor Unit Functional Concept 3.3.2 General Frequency Control Outline After the "Starting frequency control" function has been terminated, the ideal compressor frequency will be determined by the "General frequency control". General The compressor operation frequency is controlled in order to keep a constant evaporation temperature in cooling and a constant condensing temperature in heating.
  • Page 182 Outdoor Unit Functional Concept ESIE04-01 Frequency steps The operating frequency for the sky-air RZQ inverter units will be a value chosen from a list with fixed frequency settings that is programmed in the unit's memory: Step No. Compressor operation frequency RZQ71B RZQ100 ~125B 38Hz...

  • Page 183: Low Pressure Protection Control

    ESIE04-01 Outdoor Unit Functional Concept 3.3.3 Low Pressure Protection Control Outline In order to prevent abnormal low pressures in the system, the below control function will be activated. Low pressure is measured by the low pressure sensor. Flow chart (When cooling operation) (When heating operation) •...

  • Page 184: High Pressure Protection Control

    Outdoor Unit Functional Concept ESIE04-01 3.3.4 High Pressure Protection Control Outline In order to prevent abnormal high pressures in the system and hence avoiding activation of the high pressure safety device the below control function will be activated. Details The high pressure value will be calculated from the low pressure, power input and compressor frequency.

  • Page 185: Discharge Pipe Temperature Control

    ESIE04-01 Outdoor Unit Functional Concept 3.3.5 Discharge Pipe Temperature Control Outline The compressor operating frequency will be controlled in order to avoid abnormal high compressor temperatures (see also expansion valve control). Flow chart Normal operation • < A°C • Upper limit frequency Td >...

  • Page 186: Suction Pipe Superheat Protection Control (Heating Mode)

    Outdoor Unit Functional Concept ESIE04-01 3.3.6 Suction Pipe Superheat Protection Control (Heating Mode) Outline In case the suction superheat value in heating mode is too high, the oil return to the compressor will be insufficient. In order to avoid that the compressor oil will be accumulated in the outdoor unit heat exchanger, the upper limit frequency will be decreased.

  • Page 187: Inverter Current Protection Control

    ESIE04-01 Outdoor Unit Functional Concept 3.3.7 Inverter Current Protection Control Outline The compressor operating frequency will be restricted in order to prevent an over-current to the compressor. Flow chart Normal operation Inverter current Inverter upper limit frequency > step down current = Maximum frequency Compressor frequency Compressor frequency...

  • Page 188: Input Current Control

    Outdoor Unit Functional Concept ESIE04-01 3.3.8 Input Current Control Outline Unlike the inverter current control, this function will monitor the overall input current and will restrict the compressor upper limit operating frequency as to prevent activation of the circuit breakers. Flow chart ≤...

  • Page 189: Inverter Cooling Fin Temperature Control

    ESIE04-01 Outdoor Unit Functional Concept 3.3.9 Inverter Cooling Fin Temperature Control Outline This control will restrict the compressor upper limit frequency in order to protect the electronic components in the switch box from overheating (L4-error activation). By lowering the compressor frequency, the current drawn by the compressor will be reduced and as a result the temperature inside the switch box will drop.

  • Page 190: Pressure Difference Control

    Outdoor Unit Functional Concept ESIE04-01 3.3.10 Pressure Difference Control Outline To ensure the compression ratio (pressure difference between high and low pressure) at low outdoor temperature conditions in cooling mode and high outdoor temperature conditions in heating mode, the outdoor fan and target compressor frequency may be varied. Cooling In cooling low ambient conditions, the outdoor fan speed and compressor frequency will be adapted to secure the differential pressure between high and low pressure.
  • Page 191 ESIE04-01 Outdoor Unit Functional Concept Frequency restriction in cooling Normal control Used indoor unit Wall mounted indoor 109Hz 139Hz 112Hz Upper limit Other than wall mounted frequency 169Hz 164Hz indoor Lower limit 38Hz 41Hz frequency Upper limit 109Hz 123Hz frequency Lower limit 62Hz 48Hz...

  • Page 192: Oil Recovery Operation

    Outdoor Unit Functional Concept ESIE04-01 3.3.11 Oil Recovery Operation Outline When the compressor operates for a certain period of time at low frequency, the oil level in the compressor may become low due to incomplete oil recovery.To prevent damage to the compressor and in worst case avoid compressor lock, an oil recovery operation will be conducted.

  • Page 193: Expansion Valve Regulating Functions

    ESIE04-01 Outdoor Unit Functional Concept Expansion Valve Regulating Functions Introduction This chapter will explain the functions that are used to control the expansion valve opening. Content Topic See page 3.4.1–Expansion Valve Control at Startup 2–56 3.4.2–General Expansion Valve Control 2–57 3.4.3–Discharge Pipe Temperature Control 2–58 Part 2 –...
  • Page 194 Outdoor Unit Functional Concept ESIE04-01 3.4.1 Expansion Valve Control at Startup Outline Before going to the general expansion valve control, the expansion valve opening will be limited in order to avoid the risk of liquid back and allow quick build up of pressure difference. Details During startup, the opening degree is determined by both the compressor frequency &...
  • Page 195 ESIE04-01 Outdoor Unit Functional Concept 3.4.2 General Expansion Valve Control Outline After the start up control function has been terminated the general expansion valve control function will regulate the expansion valve opening in function of the target suction SH value (= superheat at evaporator outlet).
  • Page 196 Outdoor Unit Functional Concept ESIE04-01 3.4.3 Discharge Pipe Temperature Control Outline The expansion valve opening will be controlled in order to avoid abnormal high compressor discharge temperatures (see also compressor operating frequency control). Details Normal operation Td < N°C Td > M°C Expansion valve opening +5 pls/2 min when cooling, 1 min when heating.

  • Page 197: Outdoor Unit Fan Speed Control

    ESIE04-01 Outdoor Unit Functional Concept Outdoor Unit Fan Speed Control Introduction This chapter will explain how the outdoor fan speed is determined in cooling and heating operation. Content Topic See page 3.5.1–Outdoor Unit Fan Speed Control 2–60 Part 2 – Functional Description 2–59...
  • Page 198 Outdoor Unit Functional Concept ESIE04-01 3.5.1 Outdoor Unit Fan Speed Control Fan speed control The outdoor fan speed will be controlled in function of the actual outdoor ambient temperature, the condensation pressure, pressure difference between low and high pressure and compression ratio. For details please refer to "Pressure Difference Control".
  • Page 199 ESIE04-01 Outdoor Unit Functional Concept Fan step table RZQ125 Cooling Heating Step Reference See also: "Pressure Difference Control" on page 2–52 "Defrost Operation" on page 2–18 Part 2 – Functional Description 2–61...
  • Page 200 Outdoor Unit Functional Concept ESIE04-01 2–62 Part 2 – Functional Description...
  • Page 201 ESIE04-01 Part 3 Troubleshooting What is in this part? This part contains the following chapters: Chapter See page 1–Troubleshooting 3–3 2–Error Codes: Indoor Units 3–39 3–Error Codes: Outdoor Units 3–53 4–Error Codes: System Malfunctions 3–89 5–Additional Checks for Troubleshooting 3–97 Part 3 –...
  • Page 202 ESIE04-01 3–2 Part 3 – Troubleshooting...

  • Page 203: What Is In This Chapter?

    ESIE04-01 Troubleshooting Part 3 Troubleshooting What Is in This Chapter? Introduction When a problem occurs, you have to check all possible malfunctions. This chapter gives a general idea of where to look for malfunctions. Not all repair procedures are described. Some procedures are considered common practice. Overview This chapter contains the following topics: Topic...

  • Page 204: General Troubleshooting Flowchart

    Troubleshooting ESIE04-01 General Troubleshooting Flowchart Find out the situation according to the following procedure when there is a request for service from the customer. Troubleshooting by remote Turn the power supply Refer to "Remote controller display Wait until controller malfunction switch ON or replace power failure malfunction code and contents".

  • Page 205: Overview Of General Problems

    ESIE04-01 Troubleshooting Overview of General Problems Overview Equipment Condition Remedy Equipment does not operate. See page 3-6 Fan operates, but compressor does not. See page 3-6 Cooling/heating operation starts but stops See page 3-10 immediately. After unit shuts down, it cannot be See page 3-12 restarted for a while.
  • Page 206 Troubleshooting ESIE04-01 1.3.1 Equipment does not operate Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Causes Fuse blown or disorder of contact in operation circuit Faulty operation switch or contact point Faulty high pressure switch Faulty magnetic switch for fan motor Activation or fault of overcurrent relay for fan motor Faulty overcurrent relay for compressor...
  • Page 207 ESIE04-01 Troubleshooting Troubleshooting Is power switch OFF or fuse for Turn on power switch or replace power switch fuse. blown? If high-harmonics circuit breaker is not used on inverter compressor, have the circuit breaker replaced. Is there power failure? Wait until power returns. Normal.
  • Page 208 Troubleshooting ESIE04-01 1.3.2 Indoor fan operates, but compressor does not Applicable Model All models of SkyAir series Method of Malfunction Detection Malfunction Decision Conditions Possible Causes Faulty thermistor Faulty indoor/outdoor unit PCB Faulty magnetic switch Faulty power transistor Faulty compressor 3–8 Part 3 –...
  • Page 209 ESIE04-01 Troubleshooting Troubleshooting · Indoor unit fan runs at set airflow rate. · (In cooling operation) When air thermistor ambient temperature is higher than set temperature · (In heating operation) When air thermistor ambient temperature is lower than set temperature Is the power switch OFF or the fuse for Turn on the power...
  • Page 210 Troubleshooting ESIE04-01 1.3.3 Cooling/heating operation starts but stops immediately. Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Cause Excess charge of refrigerant Air intrudes into refrigerant system Faulty pressure switch Faulty magnetic switch for outdoor unit fan motor Faulty aux.
  • Page 211 ESIE04-01 Troubleshooting Troubleshooting wired the operation Is the type of Diagnose based on the remote controller wired or lamp of remote controller wireless? flashing? error code on remote controller Wireless Is the operation lamp of indoor unit photo-sensing section flashing? Heating: Indoor unit Cooling: Outdoor unit Malfunction of fan motor...
  • Page 212 Troubleshooting ESIE04-01 1.3.4 After unit shuts down, it cannot be restarted for a while. Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Cause Overcurrent relay (for compressor) Compressor protection thermostat Overcurrent relay may act due to the following reasons Lower voltage of power supply Excess level of high pressure Insufficient size of power cable...
  • Page 213 ESIE04-01 Troubleshooting Troubleshooting Turn the operation switch ON and OFF, then wait at ON side. Does the unit Normal. Unit is in 3-min start operation after standby mode 3 minutes? [Electric system] Power supply voltage is within Contact power company ±10 % of specified voltage.
  • Page 214 Troubleshooting ESIE04-01 1.3.5 Equipment operates but does not provide cooling Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Cause Overcurrent relay (for compressor) Compressor protection thermostat Overcurrent relay may act due to the following reasons Lower voltage of power supply Excess level of high pressure Insufficient size of power cable...
  • Page 215 ESIE04-01 Troubleshooting Troubleshooting Measure the temperature of suction air and supply air. Temperature difference = Suction air temp. – Supply air temp. Temperature Does the difference for cooling heat load increase after Normal. should be between 8 installation of the and 18˚C.
  • Page 216 Troubleshooting ESIE04-01 1.3.6 Equipment operates but does not provide heating Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Cause Excess charge of refrigerant Air intrudes into refrigerant system Faulty pressure switch Faulty magnetic switch for outdoor unit fan motor Faulty aux.
  • Page 217 ESIE04-01 Troubleshooting Troubleshooting Is the unit Wait for a while. in defrost mode? No abnormality Measure the temperature of suction air and supply air. Temperature difference = Suction air temp. – Supply air temp. Temperature Does the difference for heating heat load increase after No abnormality should be between 14...
  • Page 218 Troubleshooting ESIE04-01 1.3.7 Equipment discharges white mist Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Cause Humid installation site Installation site is dirty and with dense oil mists. Soiled heat exchanger Clogged air filter Malfunction of fan motor Troubleshooting Is the room...
  • Page 219 ESIE04-01 Troubleshooting 1.3.8 Equipment produces loud noise or shakes Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Cause Excess charge of refrigerant Air intrudes into refrigerant system Flushing noise due to refrigerant shortage. (Sound of shoo...) Troubleshooting [Installation work side] Does...
  • Page 220 Troubleshooting ESIE04-01 1.3.9 Equipment discharges dust. Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Cause Carpet Animal's hair Application (cloth shop,...) Troubleshooting Does the trouble generate at the time of operation start again after Dust collected inside the indoor extended period of unit are blown out.
  • Page 221 ESIE04-01 Troubleshooting 1.3.10 Remote controller LCD displays "88" Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Possible Cause Troubleshooting Trouble generates just after power The unit is checking to confirm supply ON that remote controller is normal. Indication appears for short time.
  • Page 222 Troubleshooting ESIE04-01 1.3.11 Swing flap does not operate Applicable Models FUQ, FHQ, FAQ100 Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction Detection Malfunction When ON/OFF of the micro switch for positioning cannot be reversed even through the swing flap Decision motor for a specified amount of time (about 30 seconds).
  • Page 223 ESIE04-01 Troubleshooting Troubleshooting the connectors correctly connected to Connect correctly. X29A and X14A on the PC board? the limit switch’s transfer Connect correctly. connector correctly connected? Turn the power supply off once and back on, and check whether the swing flap motor swings when the power supply is turned back on.

  • Page 224: Procedure Of Self-Diagnosis By Remote Controller

    Troubleshooting ESIE04-01 Procedure of Self-Diagnosis by Remote Controller The following modes can be selected by using the [Inspection/Test Operation] button on the The inspection/test button remote control. Depress Inspection/Test Operation button for more than 4 seconds. Service data can be obtained. Indoor unit settings can be made.

  • Page 225: Fault-Diagnosis By Wired Remote Controller

    ESIE04-01 Troubleshooting Fault-diagnosis by Wired Remote Controller Explanation If operation stops due to malfunction, the remote controller’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.

  • Page 226: Fault-Diagnosis By Wireless Remote Controller

    Troubleshooting ESIE04-01 Fault-diagnosis by Wireless Remote Controller Introduction Contrary to the wired remote controller, the wireless remote controller does not display the error code. Instead, the operation LED on the light reception section flashes. Checking To find the error code, proceed as follows: Step Action Press the INSPECTION/TEST button to select “inspection”.
  • Page 227 ESIE04-01 Troubleshooting Step Action Press the UP or DOWN button and change the UNIT No. until the receiver of the remote controller starts to beep. DOWN If you hear... Then... 3 short beeps Follow all steps below. 1 short beep Follow steps 3 and 4.
  • Page 228 Troubleshooting ESIE04-01 Step Action Press the UP or DOWN button to change the error code upper digit until the receiver of the remote controller starts to beep. DOWN DOWN If you hear... Then... 2 short beeps The upper digit matches. 1 short beep No digits match.
  • Page 229 ESIE04-01 Troubleshooting Step Action Press the UP or DOWN button and change the error code lower digit until the receiver of the remote controller generates a continuous beep. DOWN DOWN Press the MODE button to return to normal status. If you do not press any button for at least 1 min, the remote controller returns automatically to normal status.

  • Page 230: Overview Of Error Codes

    Troubleshooting ESIE04-01 Overview of Error Codes Malfunction Code Contents/Processing Remarks Failure of PC board ass’y for indoor unit Malfunction of drain water level system Indoor unit fan motor overload / overcurrent / lock (Note 1) Abnormal drain water level Activation of float switch during compressor off. Failure of capacity setting Either capacity data is set incorrectly, or capacity has not been set for the data IC...
  • Page 231 ESIE04-01 Troubleshooting Malfunction Code Contents/Processing Remarks Open phase or voltage unbalance Abnormal radiation fin temperature sensor (outdoor unit) Failure of capacity setting (outdoor unit) Either capacity data is set incorrectly, or capacity has not been set for the data IC Lack of gas malfunction Abnormal suction pipe temperature Abnormal power supply voltage...

  • Page 232: Troubleshooting By Led Indications

    Troubleshooting ESIE04-01 Troubleshooting by LED Indications 1.8.1 Troubleshooting by LED on the indoor unit’s Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal) : LED on / : LED off / : LED blinks / — : No connection with troubleshooting Microcomputer Transmission Normal Monitor...
  • Page 233 ESIE04-01 Troubleshooting 1.8.2 Troubleshooting by LED on outdoor unit PCB The following diagnosis can be conducted by turning on the power switch and checking the LED indication on the printed circuit board of the outdoor unit. : LED on / : LED off / : LED blinks / —...

  • Page 234: Troubleshooting By Remote Controller Display / Led Display

    Troubleshooting ESIE04-01 Troubleshooting by Remote Controller Display / LED Display : LED blinks / : LED on / : LED off / — : No connection with troubleshooting Explanation for Symbols : High probability of malfunction : Possibility of malfunction : Low probability of malfunction —...
  • Page 235 ESIE04-01 Troubleshooting 1.9.2 Outdoor malfunctions Outdoor Unit Remote Location of Malfunction Contents of Malfunction Details of Malfunction Controller Malfunction Other PC Board Display (Reference than PC Outdoor Indoor Remote Page) Board Unit Unit Controller — — Activation of protection device 3–54 Note 1.
  • Page 236 Troubleshooting ESIE04-01 1.9.3 System Outdoor Unit Remote Location of Malfunction Contents of Malfunction Details of Malfunction Controller Malfunction Other PC Board Display (Reference than PC Page) Outdoor Indoor Remote Board Unit Unit Controller — Transmission error (between 3–90 or UF indoor and outdoor unit) —...

  • Page 237: Overview Of The Outdoor Safety Devices

    ESIE04-01 Troubleshooting 1.10 Overview of the Outdoor Safety Devices High pressure switch Fuse Open Close RZQ71 4.0 Mpa +0/-0.15 3.0 +/-0.15 6.3A/250V RZQ100 RZQ125 Part 3 – Troubleshooting 3–37...

  • Page 238: Overview Of The Indoor Safety Devices

    Troubleshooting ESIE04-01 1.11 Overview of the Indoor Safety Devices Thermal protector Thermal fuse fan motor Abnormal Reset (automatic) FFQ35~60 >130°C +/-5°C <83°C +/-20°C N.A. FCQ35~71 >130°C +/-5°C <83°C +/-20°C N.A. FCQ100/125 >140°C +/-5°C <45°C +/-15°C N.A. FBQ35~125 N.A. N.A. >152°C FDQ125 N.A.

  • Page 239: What Is In This Chapter

    ESIE04-01 Error Codes: Indoor Units Part 3 Error Codes: Indoor Units What Is in This Chapter? Introduction In the first stage of the troubleshooting sequence, it is important to correctly interpret the error code on the remote controller display. The error code helps you to find the cause of the problem. Shutdown For some errors, the system only shuts down when the error occurs several times.

  • Page 240: Malfunctioning Indoor Pcb

    Error Codes: Indoor Units ESIE04-01 Malfunctioning Indoor PCB (A1) Error code LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning — — Error generation The error is generated when the data from the EEPROM is not received correctly. EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds its content without power.

  • Page 241: Malfunction Of Drain Water Level System

    ESIE04-01 Error Codes: Indoor Units Malfunction of Drain Water Level System (A3) Error code LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the water level reaches its upper limit and when the float switch turns OFF.
  • Page 242 Error Codes: Indoor Units ESIE04-01 Troubleshooting Begin Is the short-circuit Connect the Is the optional drain Is the unit a cassette connector connected to Short-circuit raising mechanism or built-in type? X15A on the indoor connector. connected? unit PCB? Check the continuity of the short-circuit connector.
  • Page 243 ESIE04-01 Error Codes: Indoor Units Remark If "A3" is detected by a PC board which is not mounted with X15A, the PC board is defective. Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.

  • Page 244: Malfunctioning Drain System

    Error Codes: Indoor Units ESIE04-01 Malfunctioning Drain System (AF) Error code LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the float switch changes from ON to OFF while the compressor is OFF. Causes The possible causes are: Error in the drain pipe installation...
  • Page 245 ESIE04-01 Error Codes: Indoor Units Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Part 3 – Troubleshooting 3–45...

  • Page 246: Indoor Unit Fan Motor Lock

    Error Codes: Indoor Units ESIE04-01 Indoor Unit Fan Motor Lock (A6) Error code LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the fan rotations are not detected while the output voltage to the fan is at its maximum.
  • Page 247 ESIE04-01 Error Codes: Indoor Units Troubleshooting Check the connections of X20A and X26A. Connect X20A Are X20A and and X26A X26A properly correctly. connected? Unplug X26A and switch the power supply on. Check the voltage between pins 1 and 3 of X26A. Replace indoor Is there about unit PCB.

  • Page 248: Malfunctioning Capacity Setting

    Error Codes: Indoor Units ESIE04-01 Malfunctioning Capacity Setting (AJ) Error code LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the following conditions are fulfilled: Condition Description The unit is in operation.
  • Page 249 ESIE04-01 Error Codes: Indoor Units Troubleshooting Check if the capacity setting adapter is plugged into X23A of the indoor PCB. Is the capacity Plug a capacitor setting setting adapter plugged adapter that matches the into X23A of the indoor capacity of the unit into X23A. unit PCB? Switch the power supply off and...

  • Page 250: Thermistor Abnormality

    Error Codes: Indoor Units ESIE04-01 Thermistor Abnormality (C4, C5, C9) Error code The table below describes the two thermistor abnormalities. Error Description Malfunctioning heat exchanger thermistor system. Malfuncioning gaspipe thermistor system. Malfunctioning suction air thermistor system. LED indications The table below shows the LED indications. Operation HAP (green) HBP (green)
  • Page 251 ESIE04-01 Error Codes: Indoor Units Troubleshooting Check the connector connection. Correct the Is it connected connection. properly? Check the thermistor resistance. Replace the Is it normal? thermistor. Check the contact between thermistor and PCB. Is the contact Correct contact C4: Indoor liquid pipe thermistor (R2T). C5: Gaspipe thermistor (R3T) Replace outdoor C9: Air suction thermistor (R1T).

  • Page 252: Malfunctioning Remote Controller Air Thermistor

    Error Codes: Indoor Units ESIE04-01 Malfunctioning Remote Controller Air Thermistor (CJ) Error code LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the remote controller thermistor becomes disconnected or shorted while the unit is running.

  • Page 253: What Is In This Chapter

    ESIE04-01 Error Codes: Outdoor Units Part 3 Error Codes: Outdoor Units What Is in This Chapter? Introduction In the first stage of the troubleshooting sequence, it is important to correctly interpret the error code on the remote controller display. The error code helps you to find the cause of the problem. Overview This chapter contains the following topics: Topic...

  • Page 254: Actuation Of Protection Device

    Error Codes: Outdoor Units ESIE04-01 Actuation of Protection Device (E0) Remote Controller Display Method of The protection device input circuit checks the actuation of each individual protection device. Malfunction (Batch detection of all protection devices) Detection Malfunction Decision Conditions Supposed Causes Actuation of outdoor unit protection device Faulty outdoor unit PC board Instantaneous power failure...

  • Page 255: Failure Of Outdoor Unit Pc Board

    ESIE04-01 Error Codes: Outdoor Units Failure of Outdoor Unit PC Board (E1) Remote Controller Display Method of Microcomputer checks whether E PROM is normal. Malfunction Detection Malfunction PROM: Decision When E PROM malfunctions when turning the power supply on Conditions Supposed Causes Faulty outdoor unit PC board Troubleshooting...

  • Page 256: Abnormal High Pressure (Detected By The Hps) (E3)

    Error Codes: Outdoor Units ESIE04-01 Abnormal High Pressure (Detected by the HPS) (E3) Remote Controller Display Method of The protection device circuit checks continuity in the high pressure switch. Malfunction Detection Malfunction When the high pressure switch is actuated Decision Actuating pressure: Conditions RZQ71~125...
  • Page 257 ESIE04-01 Error Codes: Outdoor Units Troubleshooting Check the installation conditions. Is the stop Open the stop valve. valve open? control and protection HPS connected to Connect correctly. outdoor unit PC board? (Note) Turn off the power supply. Wait for 10 minutes after compressor stops operating, then check the following.

  • Page 258: Actuation Of Low Pressure Sensor

    Error Codes: Outdoor Units ESIE04-01 Actuation of Low Pressure Sensor (E4) Remote Controller Display Method of Malfunction Detection Malfunction Error is generated when the low pressure is dropped under specific pressure. Decision Conditions Supposed Causes Abnormal drop of low pressure (Lower than 0.15MPa) Defect of low pressure sensor Defect of outdoor unit PC board Stop valve is not opened.
  • Page 259 ESIE04-01 Error Codes: Outdoor Units *2 Refer to Low pressure sensor, check on page 3–111. Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Part 3 – Troubleshooting 3–59...

  • Page 260: Compressor Motor Lock

    Error Codes: Outdoor Units ESIE04-01 Compressor Motor Lock (E5) Remote Controller Display Method of Inverter PC board takes the position signal from UVWN line connected between the inverter and Malfunction compressor, and detects the position signal pattern. Detection Malfunction The position signal with 3 times cycle as imposed frequency is detected when compressor motor Decision operates normally, but 2 times cycle when compressor motor locks.
  • Page 261 ESIE04-01 Error Codes: Outdoor Units Troubleshooting Check the installation conditions. Is the stop Open the stop valve. valve open? Is the UVWN Connect correctly. wiring normal? Is high differential pressure starting? Remedy the cause. (0.5MPa or more) Check and see whether compressor is Replace the compressor.

  • Page 262: Malfunction Of Outdoor Unit Fan Motor

    Error Codes: Outdoor Units ESIE04-01 Malfunction of Outdoor Unit Fan Motor (E7) Remote Controller Display Method of Abnormality of fan motor system is detected according to the fan speed detected by hall IC when the Malfunction fan motor runs. Detection Malfunction When the fan runs with speed less than a specified one for 15 seconds or more when the fan motor Decision...

  • Page 263: Malfunction Of Electronic Expansion Valve

    ESIE04-01 Error Codes: Outdoor Units Malfunction of Electronic Expansion Valve (E9) Remote Controller Display Method of Method is determined according to the suction pipe superheat degree and electronic expansion valve Malfunction opening degree calculated by values of low pressure sensor and suction pipe temperature thermistor. Detection Malfunction When the following conditions are met for 10 minutes...
  • Page 264 Error Codes: Outdoor Units ESIE04-01 Troubleshooting Turn the power supply off once and back on. Problem could be caused Normal reset? by external factor (noise, etc.) other than malfunction. Is the electronic expansion valve coil connected Connect correctly. to outdoor unit PC board? With remote controller ON, doesn’t...

  • Page 265: Malfunctioning In Discharge Pipe Temperature

    ESIE04-01 Error Codes: Outdoor Units Malfunctioning in Discharge Pipe Temperature (F3) Remote Controller Display Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature Malfunction sensor. Detection Malfunction When the discharge pipe temperature rises to an abnormally high level Decision When the discharge pipe temperature rises suddenly Conditions...
  • Page 266 Error Codes: Outdoor Units ESIE04-01 Troubleshooting Is the Abnormality in refrigerant system discharge pipe such as gas shortage, faulty temperature high? compressor, etc. Conduct inspection. (See *1.) Is the discharge pipe Connect correctly, and operate thermistor correctly the unit again. connected? Is the discharge pipe...

  • Page 267: Malfunctioning Hps System

    ESIE04-01 Error Codes: Outdoor Units 3.10 Malfunctioning HPS System (H3) Remote Controller Display Method of The protection device circuit checks continuity in the high pressure switch. Malfunction Detection Malfunction When there is no continuity in the high pressure switch during compressor stops operating. Decision Conditions Supposed Causes...

  • Page 268: Malfunction Of Outdoor Fan Motor Signal

    Error Codes: Outdoor Units ESIE04-01 3.11 Malfunction of Outdoor Fan Motor Signal (H7) Remote Controller Display Method of Detection of signal malfunction from outdoor fan motor. Malfunction Detection Malfunction When malfunction signal is detected at the start of fan motor operation. Decision Conditions Supposed Causes...

  • Page 269: Malfunction Of Thermistor System

    ESIE04-01 Error Codes: Outdoor Units Malfunction of Thermistor System (H9, J3, J5, J6) 3.12 H9, J3, J5, J6 Remote Controller Display Method of Abnormality is detected according to the temperature detected by each individual thermistor. Malfunction Detection Malfunction When thermistor is disconnected or short-circuited during operation Decision Conditions Supposed Causes...

  • Page 270: Malfunction Of Suction Pipe Pressure Sensor

    Error Codes: Outdoor Units ESIE04-01 3.13 Malfunction of Suction Pipe Pressure Sensor (JC) Remote Controller Display Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the suction pipe pressure sensor is short circuit or open circuit. Decision Conditions Supposed Causes...

  • Page 271: Radiation Fin Temperature Increased

    ESIE04-01 Error Codes: Outdoor Units 3.14 Radiation Fin Temperature Increased (L4) Remote Controller Display Fin temperature is detected by the thermistor of the radiation fin. Method of Malfunction (Thermistor for RZQ100 & 125 is on power transistor (IGBT).) Detection Malfunction When the temperature of the inverter radiation fin increases abnormally due to faulty heat dissipation.

  • Page 272: Dc Output Overcurrent (Instantaneous)

    Error Codes: Outdoor Units ESIE04-01 3.15 DC Output Overcurrent (Instantaneous) (L5) Remote Controller Display Method of Malfunction is detected by converting the current flowing to power transistor into voltage with CT1 (DC Malfunction current sensor). Detection Malfunction When overcurrent has run to power transistor. Decision (Actuated even by instantaneous overcurrent) Conditions...
  • Page 273 ESIE04-01 Error Codes: Outdoor Units Troubleshooting Check the installation conditions. Is the stop valve open? Open the stop valve. the compressor coil disconnected or Replace the compressor. is the insulation defective? Turn the main power supply off, and then disconnect the connection between the compressor and inverter.

  • Page 274: Electronic Thermal (Time Lag)

    Error Codes: Outdoor Units ESIE04-01 3.16 Electronic Thermal (Time Lag) (L8) Remote Controller Display Method of Malfunction is detected by converting the current flowing to power transistor into voltage with CT1 (DC Malfunction current sensor). Detection Inverter PC board detects the disorder of position signal. Malfunction When compressor overload (except for when startup) is detected.
  • Page 275 ESIE04-01 Error Codes: Outdoor Units Troubleshooting Is the Compressor overload secondary current of Inspection of the compressor the inverter higher than and refrigerant system is required. A (see below) for each phase? Turn the main power supply off, and then disconnect the connection between the compressor and inverter.

  • Page 276: Stall Prevention (Time Lag)

    Error Codes: Outdoor Units ESIE04-01 3.17 Stall Prevention (Time Lag) (L9) Remote Controller Display Method of Malfunction is detected by converting the current flowing to power transistor into voltage with CT1 (DC Malfunction current sensor). Detection Inverter PC board detects the disorder of position signal. Malfunction When compressor overload (except for when startup) is detected Decision...
  • Page 277 ESIE04-01 Error Codes: Outdoor Units Troubleshooting Check the installation conditions. Is the stop valve open? Open the stop valve. the difference between high and low Insufficient pressure equalization Check refrigerant system. pressure before startup not more than 0.2MPa? Is the secondary current Compressor overload of the inverter higher than...

  • Page 278: Malfunction Of Transmission System

    Error Codes: Outdoor Units ESIE04-01 3.18 Malfunction of Transmission system (Between Control PCB and Inverter PCB) (LC) Remote Controller Display Method of Checks and sees whether transmission between control and inverter PC board is carried out normally. Malfunction Detection Malfunction When the transmission is not carried out in a specified period of time or longer Decision Conditions...
  • Page 279 ESIE04-01 Error Codes: Outdoor Units Troubleshooting the fan motor Connect the connector, and connector turn on again. connected? connectors connecting the Connect the transmission control and inverter PC wiring, and turn on again. board connected securely? Is the transmission wiring between the control and Fix the disconnection, and turn on again.

  • Page 280: Open Phase

    Error Codes: Outdoor Units ESIE04-01 3.19 Open Phase (P1) Remote Controller Display Method of Malfunction is detected according to the voltage waveform of main circuit capacitor built in inverter. Malfunction Detection Malfunction When the aforementioned voltage waveform becomes identical with the waveform of the power supply Decision open phase.
  • Page 281 ESIE04-01 Error Codes: Outdoor Units Troubleshooting Check LED on the outdoor Other factors than open phase unit PC board (Open phase?) Open phase of Field factors power supply voltage? Is the voltage imbalance Field factors between phases large? (Note) Target : ±10V between phases, Replace the MS.

  • Page 282: Malfunction Of Radiator Fin Temperature Thermistor

    Error Codes: Outdoor Units ESIE04-01 3.20 Malfunction of Radiator Fin Temperature Thermistor (P4) Remote Controller Display Method of Detection by open or short circuit of the radiator fin temperature thermistor during the compressor Malfunction stops operating. Detection Malfunction When open or short circuit of the radiator fin temperature thermistor is detected during the compressor Decision stops operating Conditions...
  • Page 283 ESIE04-01 Error Codes: Outdoor Units Troubleshooting RZQ100-125 Check LED on the outdoor unit PC board. Does the radiator fin temperature Probe other factors than malfunction. thermistor malfunction? Replace the inverter PC board. Is reset possible? Reset TEST *1. This error code is displayed only when button is pushed.

  • Page 284: Failure Of Capacity Setting

    Error Codes: Outdoor Units ESIE04-01 3.21 Failure of Capacity Setting (PJ) Remote Controller Display Method of Check whether set value written in E PROM (at factory) or set value of capacity setting adaptor (for Malfunction replacement) is the same as outdoor unit capacity. Detection Malfunction When the set value on E...

  • Page 285: Gas Shortage (Malfunction)

    ESIE04-01 Error Codes: Outdoor Units 3.22 Gas Shortage (Malfunction) (U0) Remote Controller Display Method of (In test operation) Malfunction Detection by closed stop valve. Detection (In normal operation) Gas shortage is detected according to the discharge pipe temperature. Malfunction (In test operation) Decision Variations of the indoor unit heat exchange temperature judge whether stop valve is open or closed.

  • Page 286: Abnormal Power Supply Voltage

    Error Codes: Outdoor Units ESIE04-01 3.23 Abnormal Power Supply Voltage (U2) Remote Controller Display Method of Malfunction is detected according to the voltage of main circuit capacitor built in the inverter and power Malfunction supply voltage. Detection Malfunction When the voltage of main circuit capacitor built in the inverter and power supply voltage drop (150-170 Decision VAC) or when the power failure of several tons of ms or longer is generated.
  • Page 287 ESIE04-01 Error Codes: Outdoor Units Troubleshooting Check LED on outdoor unit PC board. Other factors (Is the voltage insufficient?) Is the power supply voltage between Field factors 220~240 VAC ±10%? Is the wiring correct? When the compressor is running, measure the voltage between + and - of electrolytic capacitor (C+, C-).
  • Page 288 Error Codes: Outdoor Units ESIE04-01 3–88 Part 3 – Troubleshooting...

  • Page 289: Error Codes: System Malfunctions

    ESIE04-01 Error Codes: System Malfunctions Part 3 Error Codes: System Malfunctions What Is in This Chapter? Introduction In the first stage of the troubleshooting sequence, it is important to correctly interpret the error code on the remote controller display. The error code helps you to find the cause of the problem. Overview This chapter contains the following topics: Topic...
  • Page 290 Error Codes: System Malfunctions ESIE04-01 Malfunction of Transmission between Indoor and Outdoor Unit (U4 or UF) Error code Error generation The error is generated when the microprocessor detects that the transmission between the indoor and the outdoor unit is not normal over a certain amount of time. Causes The possible causes are: Wiring indoor-outdoor transmission wire is incorrect...
  • Page 291 ESIE04-01 Error Codes: System Malfunctions Troubleshooting 2 Continued from previous page NO (ON or OFF) Is HAP flashing? Turn the power supply off Check of once and then back on. outdoor unit microcom- puter normal Resets normally. Is HAP flashing? Could be outside cause (noise...).
  • Page 292 Error Codes: System Malfunctions ESIE04-01 Malfunction of Transmission between Indoor Unit and Remote Controller (U5) Error code Error generation The error is generated when the microprocessor detects that the transmission between the indoor unit and the remote controller is not normal over a certain amount of time. Causes The possible causes are: Malfunctioning remote controller...

  • Page 293: Malfunction Of Transmission Between Main Remote Controller

    ESIE04-01 Error Codes: System Malfunctions Malfunction of Transmission between MAIN Remote Controller and SUB Remote Controller (U8) Error code Error generation The error is generated when, in case of controlling with two remote controllers, the microprocessor detects that the transmission between the indoor unit and the remote controllers (MAIN and SUB) is not normal over a certain amount of time.

  • Page 294: Malfunctioning Field Setting Switch

    Error Codes: System Malfunctions ESIE04-01 Malfunctioning Field Setting Switch (UA) Error code Error generation The error is generated when incorrect field settings have been set for pair/twin/triple/double twin. Causes The possible causes are: Malfunctioning indoor or outdoor unit PCB Malfunctioning power supply PCB Indoor-outdoor, indoor-indoor unit transmission wiring Malfunctioning remote controller wiring.
  • Page 295 ESIE04-01 Error Codes: System Malfunctions Troubleshooting the remote controller connected Connect the remote controller to more than correctly. one indoor unit? the outdoor unit Check setting "No. of Connected used for Twin Twin System Indoor Units" of indoor system? unit. Is the setting of Pair/Twin/Triple...

  • Page 296: Centralized Address Setting Error

    Error Codes: System Malfunctions ESIE04-01 Centralized Address Setting Error (UC) Remote Controller Display Applicable Models All indoor unit models Method of Indoor unit microcomputer detects and judges the centralized address signal according to the Malfunction transmission between indoor units. Detection Malfunction When the microcomputer judges that the centralized address signal is duplicated Decision...

  • Page 297: Additional Checks For Troubleshooting

    ESIE04-01 Additional Checks for Troubleshooting Part 3 Additional Checks for Troubleshooting What Is in This Chapter? Introduction This chapter explains how you must check the units to carry out troubleshooting correctly. Overview This chapter contains the following topics: Topic See page 5.2–Indoor Unit: Checking the Fan Motor Hall IC 3–98 5.3–Indoor Unit: Checking the Power Supply Wave Form...

  • Page 298: Indoor Unit: Checking The Fan Motor Hall Ic

    Additional Checks for Troubleshooting ESIE04-01 Indoor Unit: Checking the Fan Motor Hall IC Applicable units Units using phase cut controlled fan motor with feedback signal. Checking To check the indoor unit fan motor hall IC, proceed as follows: Step Action Make sure connector S7 on PCB 1 is properly connected.

  • Page 299: Indoor Unit: Checking The Power Supply Wave Form

    ESIE04-01 Additional Checks for Troubleshooting Indoor Unit: Checking the Power Supply Wave Form Checking To check the power supply wave form, proceed as follows: Step Action Measure the power supply wave form between pin 1 and 2 of X1M for the outdoor units or between pin 1 and 2 of X2M for the indoor units.

  • Page 300: Outdoor Unit: Checking The Installation Condition

    Additional Checks for Troubleshooting ESIE04-01 Outdoor unit: Checking the Installation Condition Checking To check the installation condition, proceed as follows: 3–100 Part 3 – Troubleshooting...

  • Page 301: Outdoor Unit: Checking The Expansion Valve

    ESIE04-01 Additional Checks for Troubleshooting Outdoor Unit: Checking the Expansion Valve Checking To check the electronic expansion valve, proceed as follows: Step Action Check if the expansion valve connector is correctly inserted in the X12A of A1P. Compare the expansion valve unit with the number of the connector to make sure it is cor- rectly connected.

  • Page 302: Checking The Thermistors

    Additional Checks for Troubleshooting ESIE04-01 Checking the Thermistors Thermistors If the cause of the problem is related to the thermistors, then the thermistors should be checked prior to changing the PCB. For more information about these thermistors, see: ’Wiring Diagrams’’ (outdoor units) “Functions of Thermistors”...

  • Page 303: Resistance Conversion Table (Ambient, Coil, Fin)

    ESIE04-01 Additional Checks for Troubleshooting Resistance Conversion Table (Ambient, Coil, Fin) Temperature – The table below is the thermistor (R1T and R2T) temperature – resistance conversion table. resistance Temp. B (kΩ) Temp. A (kΩ) B (kΩ) Temp. A (kΩ) B (kΩ) A (kΩ) (°C) (°C)

  • Page 304: R3T: Resistance Conversion Table (Discharge Pipe Sensor)

    Additional Checks for Troubleshooting ESIE04-01 R3T: Resistance Conversion Table (Discharge Pipe Sensor) Temperature – The table below is the thermistor (R3T) temperature – resistance conversion table. resistance Temp. Resist. Temp. Resist. Temp. Resist. (°C) (kΩ) (°C) (kΩ) (°C) (kΩ) — —...

  • Page 305: Evaluation Of Abnormal High Pressure

    ESIE04-01 Additional Checks for Troubleshooting Evaluation of abnormal high pressure Abnormally high pressure level is mostly caused by the condenser side. The following contents are provided by service engineer based on their field checks. Further, the number is listed in the order of degree of influence.

  • Page 306: Evaluation Of Abnormal Low Pressure

    Additional Checks for Troubleshooting ESIE04-01 5.10 Evaluation of abnormal low pressure Abnormally low pressure level is mostly caused by the evaporator side. The following contents are provided based on field checking of service engineer. Further, the number is listed in the order of degree of influence.

  • Page 307: Checks

    ESIE04-01 Additional Checks for Troubleshooting 5.11 Checks 5.11.1 Clogged Points Temperature differences must occur before or after the clogged points! COMP Indoor Unit Outdoor Unit Check points Check factor Causes Remedies Around Temperature Dust Replace the expan- expansion difference sion valve. Choked moisture mechanism Reduced effective pipe...
  • Page 308 Additional Checks for Troubleshooting ESIE04-01 5.11.2 Indoor Unit: Fan Motor Checks (Phase Controlled Motor) (1) Turn the power supply off. With the relay connector disconnected, measure the resistance between UVW phases of the connector (3 cores) at the motor side, then make sure that the resistance between each phase is balanced and not short-circuited.
  • Page 309 ESIE04-01 Additional Checks for Troubleshooting 5.11.4 Outdoor unit: Fan Speed Pulse For RZQ71~125 models (1) Disconnect the connector X206A with the power supply OFF and Operation OFF. (2) Is the voltage between pins 4 and 3 of X206A about 15 VDC after turning the power supply on? (3) Is the voltage between pins 4 and 1 of X206A about 5 VDC? (4) Connect the connector X206A with the power supply OFF and Operation OFF.
  • Page 310 Additional Checks for Troubleshooting ESIE04-01 5.11.5 Outdoor unit: Check for Power Transistor Judgment according to the continuity check by using an analog tester: (1) Do not touch the charged area (high voltage) for 10 minutes after turning the power supply off. (2) If you must touch such an area, make sure that the power supply voltage of power transistor is 50 V or less.
  • Page 311 ESIE04-01 Additional Checks for Troubleshooting 5.11.1 Outdoor unit: Check LPS Measure the voltage (DC) between pins 2 and 3 of the connector. For RZQ71~125 models Outdoor unit PC board (Blue) ƒ Black Low pressure sensor Microcomputer ‚ White A/D input ...
  • Page 312 Additional Checks for Troubleshooting ESIE04-01 3–112 Part 3 – Troubleshooting...
  • Page 313 ESIE04-01 Part 4 Commissioning and Test What is in this part? This part contains the following chapters: Chapter See page 1–Pre-Test Run Checks 4–3 2–Field settings 4–9 3–Test Run and Operation Data 4–37 Part 4 – Commissioning and Test Run 4–1...
  • Page 314 ESIE04-01 4–2 Part 4 – Commissioning and Test Run...

  • Page 315: What Is In This Chapter?

    ESIE04-01 Pre-Test Run Checks Part 4 Pre-Test Run Checks What Is in This Chapter? Introduction This chapter contains the following information: Checks before test run Test run checks Setting the address for the receiver of the wireless remote controller Setting the address for the wireless remote controller. Overview This chapter contains the following topics: Topic...

  • Page 316: Test Run Checks

    Pre-Test Run Checks ESIE04-01 Test Run Checks Checks before test Before carrying out a test run, proceed as follows: Step Action Make sure the voltage at the primary side of the safety breaker is: 230 V ± 10% Fully open the liquid and the gas stop valve. Test run checks To carry out a test run, check the following: Check that the temperature setting of the remote controller is at the lowest level in cooling mode...

  • Page 317: Setting The Wireless Remote Controller

    ESIE04-01 Pre-Test Run Checks Setting the Wireless Remote Controller Introduction To set the wireless remote controller, you have to set the address for: The receiver of the wireless remote controller The wireless remote controller. Setting the address The address for the receiver of the wireless remote controller is factory set to 1. To change this setting, for the receiver proceed as follows: Step...
  • Page 318 Pre-Test Run Checks ESIE04-01 Setting the address The address for the wireless remote controller is factory set to 1. To change this setting, proceed as for the wireless follows: remote controller Step Action Hold down the FILTER RESET button and the TEST button for at least 4 s, to go to field set mode.
  • Page 319 ESIE04-01 Pre-Test Run Checks Step Action Press the UP and DOWN buttons to set the address. Set the same address as the receiver (1, 2 or 3). The receiver does not work with addresses 4, 5 and 6. DOWN Press the RESERVE button to confirm the setting. RESERVE Part 4 –...
  • Page 320 Pre-Test Run Checks ESIE04-01 Step Action Press the TEST button to quit the field set mode and return to the normal display. ON / OFF TEMP TIME ˚C DOWN RESERVE CANCEL TIMER MODE SWING /TEST TEST Multiple settings When an outside control (central remote controller...) controls an indoor unit, sometimes the indoor unit does not respond to ON/OFF and temperature settings commands from this controller.

  • Page 321: What Is In This Chapter?

    ESIE04-01 Field settings Part 4 Field settings What Is in This Chapter? Introduction This chapter contains the following information: How to change the field settings The field settings The factory settings. Overview This chapter contains the following topics: Topic See page 2.2–How to Change the Field Settings with the Wired Remote Controller 4–10 2.3–How to Change the Field Settings with the Wireless Remote Controller...

  • Page 322: How To Change The Field Settings With The Wired Remote Controller

    Field settings ESIE04-01 How to Change the Field Settings with the Wired Remote Controller Installation The field settings have to be changed with the remote controller according to the installation conditions conditions. Wired remote The illustration below shows the wired remote controller. controller 23 7 Components...
  • Page 323 ESIE04-01 Field settings Setting To set the field settings, you have to change: “Mode No.” “First code No.” “Second code No.”. To change the field settings, proceed as follows: Step Action Hold down the INSPECTION/TEST button for at least 4 s during normal mode to enter the “Field setting mode”.

  • Page 324: How To Change The Field Settings With The Wireless Remote Controller

    Field settings ESIE04-01 How to Change the Field Settings with the Wireless Remote Controller Optional If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. accessories Refer to OH98-2 or the installation manual (optional handbook) for each optional accessory. Wireless remote The illustration below shows the wireless remote controller.

  • Page 325: Overview Of The Field Settings On The Indoor Units

    ESIE04-01 Field settings Overview of the Field Settings on the Indoor Units Field settings The table below contains the possible field settings of all indoor units. Mode First Second code No. Description of the setting code No. 10 or 20 Filter counter Light heavy...

  • Page 326: Overview Of The Factory Settings On The Indoor Units

    Field settings ESIE04-01 Overview of the Factory Settings on the Indoor Units Factory settings The table below contains the factory settings of all indoor units Mode No. First code Second code No. 10 or 20 — — — 11 or 21 12 or 22 —...

  • Page 327: Setting The Ceiling Height

    ESIE04-01 Field settings Setting the Ceiling Height Incorrectly setting If you set the controller incorrectly, a connection mistake malfunction “UA” will appear on the remote controller display. See ’Malfunctioning Field Setting Switch (UA)’ on page 3–94. Mode No. 13 or 23 Set the second code No., according to the tables below.

  • Page 328: Setting The Filter Counter

    Field settings ESIE04-01 Setting the Filter Counter Mode No. 10 or 20 When the filter counter indication time is set to ON, set the second code No., according to the table First code No. 0 below Unit Mode No. First code No. Second code No.

  • Page 329: Main/Sub Setting When Using Two Remote Controllers

    ESIE04-01 Field settings MAIN/SUB Setting when Using Two Remote Controllers Situation The MAIN/SUB setting is necessary when one indoor unit is controlled by two remote controllers. When you use two remote controllers (control panel and separate remote controller), set one to MAIN and the other to SUB.

  • Page 330: Setting The Centralized Group No

    Field settings ESIE04-01 Setting the Centralized Group No. When? If you want to carry out centralized control with a central remote controller and a unified ON/OFF controller, you have to set the group No. for each group with the remote controller. Wired remote The illustration below shows the wired remote controller.
  • Page 331 ESIE04-01 Field settings Individually If the address must be set individually for each unit, set the “Mode No.” to “30”. For example, for power address setting consumption counting. Part 4 – Commissioning and Test Run 4–19...

  • Page 332: The Field Setting Levels

    Field settings ESIE04-01 2.10 The Field Setting Levels Introduction The three field setting levels are: Inspection level Monitoring level Maintenance mode settings. The inspection level The inspection level is the highest level of the three field setting levels. You can change the views in the inspection level by pressing the INSPECTION/TEST button.
  • Page 333 ESIE04-01 Field settings Possible system The table below contains the possible system settings, which are displayed on the remote controller if settings the TEST button is pushed twice shortly. Size Type Software Settings Display Settings Display — Changing the mode To enter the monitoring level and to change the maintenance mode settings, proceed as follows: settings Step...
  • Page 334 Field settings ESIE04-01 Maintenance Mode The table below describes the maintenance mode settings. Settings Mode No. Function Content and operation method Example of the remote controller display Display malfunction history Past error code The history No. can be changed with the pro- Unit No.

  • Page 335: Overview Of The Field Settings On The Outdoor Units

    ESIE04-01 Field settings 2.11 Overview of the Field Settings on the Outdoor Units Remote controller The table below contains the remote controller settings. settings Mode N° First Description Second n° Details code 16 or 26 Night time low Disabled Automatic Capacity Automatic —...
  • Page 336 Field settings ESIE04-01 This drawing shows the position of jumper JX5 on PCB A1P. DIP switches The table below contains the DIP switch field settings. Label on PCB Function Details switch DS1-1 ON/OFF Switch emergency operation outdoor unit ON/OFF. See page 2-6. DS1-2 Cool / Heat Select cooling / heating emergency operation.

  • Page 337: Overview Of The Factory Settings On The Outdoor Units

    ESIE04-01 Field settings 2.12 Overview of the Factory Settings on the Outdoor Units Factory settings The table below contains the factory settings of all outdoor units RZQ71 RZQ100 RZQ125 Part 4 – Commissioning and Test Run 4–25...

  • Page 338: Silent Operation

    Field settings ESIE04-01 2.13 Silent Operation Purpose Lower the operation sound of the outdoor unit. Setting Silent Operation can be activated by: 1 Automatic control (By field setting from remote controller) 2 External activation (from optional PCB KRP58M) 2.13.1 Silent Operation by Automatic control Table Silent operation can be set by field setting from the wired remote controller: Descrip-...
  • Page 339 ESIE04-01 Field settings 2.13.2 External activation from optional PCB Graph Silent operation can also be activated from the optional PCB. Transmission connector (on outdoor PCB X6A) Power supply connector (on outdoor PCB X77A) Output on X801M = 12VDC, 12mA Maximum wire length = 100 meter Silent operation will start when the contact on LNOP-COM is closed and will remain active as long as the contact is closed.

  • Page 340: I-Demand Function

    Field settings ESIE04-01 2.14 I-Demand Function Purpose Set a limitation towards the power consumption from the system.(e.g. budget control, limit power consumption during peak moments,..) Setting 3 different demand setting can be selected by using terminal X801M: Demand 1 → Close contact between COM and contact 1 Demand 2 →...
  • Page 341 ESIE04-01 Field settings Demand 1 Power consumption limitation in function of setting on DS1: DS1 SETTING Maximum Power Consumption 100% Demand 2 Power consumption limitation set to 40%. Demand 3 Forced thermostat OFF. Part 4 – Commissioning and Test Run 4–29...

  • Page 342: Setting For Low Humidity Application

    Field settings ESIE04-01 2.15 Setting for Low Humidity Application Purpose Can be set when using the RZQ units for year round cooling in low humidity applications such as computerrooms (EDP rooms), technical rooms, etc...to increase the capacity of the unit. Definition of Low Humidity Area Relative...
  • Page 343 ESIE04-01 Field settings Function details Factory setting Low humidity application Low humidity application + setting freeze up operation pre- vention Field Setting 16(26)-2-01 16(26)-2-03 16(26)-2-04 Compressor control The compressor frequency is controlled in function of the target evaporating temperature. The target evaporating temperature is controlled in function of the cooling load. Minimum target Te = 2°C Minimum target Te = 0°C Initial minimum target Te =...
  • Page 344 Field settings ESIE04-01 Graph 1 Target evaporating temperature control in case of factory setting 16(26)-2-01: Te target acceptable area Remote controller setting temp. Te target limitted ≤ 20°C (to protect the comp.) Te target limitted ≤ Indoor temp. – 11° (not to rising wetbulb) Te (by LP sensor) target acceptable area...
  • Page 345 ESIE04-01 Field settings Graph 2 Target evaporating temperature control when "low humidity application" is selected. Field setting 16(26)-2-03: Te target acceptable area Remote controller setting temp. Te target Te target limitted ≤ 20°C (°C) (to protect the comp.) Te (by LP sensor) target acceptable area Indoor temp.
  • Page 346 Field settings ESIE04-01 Graph 3 Target evaporating temperature control when "low humidity application + freeze up operation prevention" is selected. Field setting 16(26)-2-04: Te target acceptable area Remote controller setting temp. Te target (°C) Te target limitted ≤ 20°C (to protect the comp.) Te (by LP sensor) target acceptable area Indoor temp.
  • Page 347 ESIE04-01 Field settings Capacity When "low humidity application" is selected. Field setting 16(26)-2-03: Indoot Temp. (°C-WB° Outdoor Temp. (°C-DB) Capacity (% of standard point) 0.62 0.76 0.86 0.95 1.00 1.02 1.07 1.11 0.62 0.76 0.86 0.95 1.00 1.02 1.07 1.11 0.62 0.81 0.91...

  • Page 348: Defrost Start Setting

    Field settings ESIE04-01 2.16 Defrost start setting See ‘Defrost Operation’ on page 2-18. 4–36 Part 4 – Commissioning and Test Run...

  • Page 349: 3 Test Run And Operation Data

    ESIE04-01 Test Run and Operation Data Part 4 Test Run and Operation Data Introduction This chapter contains the following information: General operation data Operation ranges. Overview This chapter contains the following topics: Topic See page 3.1–General Operation Data 4–38 3.2–Operation Range 4–41 Part 4 –...

  • Page 350: General Operation Data

    Test Run and Operation Data ESIE04-01 General Operation Data Guide Lines for The operation value guide lines when operating under standard conditions (at Rated frequency) by Optimal Operation pushing the test run button on the remote controller are as given in the table below. Condition Indoor Unit Fan: “H”...
  • Page 351 ESIE04-01 Test Run and Operation Data Standard Conditions Indoor Unit Conditions Outdoor Unit Conditions Cooling Operation 27°C DB/19°C WB 35°C DB Heating Operation 20°C DB 7°C DB/6°C WB During or after maintenance, when the power supply is turned back on, operation restarts automatically by the “auto restart function.”...
  • Page 352 Test Run and Operation Data ESIE04-01 Correlation of What happens in comparison to normal values is summarized in the table below. Air-Conditioner’s (Measured from 15 ~ 20 minutes or more after operation starts.) Operation Status and Pressure / Running Current When Cooling Air-Conditioner Status Low Pressure...

  • Page 353: Operation Range

    ESIE04-01 Test Run and Operation Data Operation Range Conditions The illustrations in this section are based on the following conditions: Equivalent piping length: 7.5 m Level difference: 0 m Air flow rate: High. Operation range: The illustration below shows the operation range. Cooling Outdoor temp.
  • Page 354 Test Run and Operation Data ESIE04-01 Notes: Depending on operation and installation conditions, the indoor unit can change over to freeze-up operation (Indoor de-icing). To reduce the freeze-up operation (Indoor de-icing) frequency it is recommended to install the outdoor unit in a location not exposed to wind. 4–42 Part 4 –...
  • Page 355 ESIE04-01 Part 5 Disassembly and Maintenance What is in this part? This part contains the following chapters: Chapter See page 1–Disassembly and Maintenance: Outdoor Units 5–3 2–Disassembly and Maintenance: Indoor Units 5–17 Part 5 – Disassembly and Maintenance 5–1...
  • Page 356 ESIE04-01 5–2 Part 5 – Disassembly and Maintenance...
  • Page 357 Disassembly and Maintenance: Outdoor Units What Is in This Chapter? Introduction This chapter contains the following information on the outdoor units: Disassembly procedures Overview This chapter contains the following topics: Topic See page 1.2–RZQ71~125B7V3B 5–4 Part 5 – Disassembly and Maintenance 5–3...
  • Page 358 Disassembly and Maintenance: Outdoor Units ESIE04-01 RZQ71~125B7V3B Overview This part contains the following topics: Topic See page Removal of Outside Panels 5–5 Removal of Propeller Fan and Fan Motor 5–6 Removal of Switch Box 5–7 Removal of PC Board Ass'y (1) 5–9...

  • Page 359: Removal Of Outside Panels

    ESIE04-01 Disassembly and Maintenance: Outdoor Units 1.2.1 Removal of Outside Panels Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points For the suction grille, pull RZQ71B7V3B the lower parts (in 7 ooks places) frontward, disengage the hooks at...

  • Page 360: Removal Of Propeller Fan And Fan Motor

    Disassembly and Maintenance: Outdoor Units ESIE04-01 1.2.2 Removal of Propeller Fan and Fan Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points Remove the front and top panels in accordance with the Removal Procedure for Outside Panel.

  • Page 361: Removal Of Switch Box

    ESIE04-01 Disassembly and Maintenance: Outdoor Units 1.2.3 Removal of Switch Box Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points Remove the front and top If the top panel cannot be panels in accordance with the removed, this switch box will Removal Procedure for...
  • Page 362 Disassembly and Maintenance: Outdoor Units ESIE04-01 Step Procedure Points Unscrew a single screw on RZQ71B7V3B or two screws on RZQ100-125B7V3B, which fix the switch box. In order to remove the switch box, disengage the three clicks (one on the right and two on the left), and then pull out this switch box frontward or upward.

  • Page 363: Removal Of Pc Board Ass'y

    ESIE04-01 Disassembly and Maintenance: Outdoor Units 1.2.4 Removal of PC Board Ass'y (1) Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points Remove the front and top panels in accordance with the Removal Procedure for Outside Panel...
  • Page 364 Disassembly and Maintenance: Outdoor Units ESIE04-01 Step Procedure Points Unscrew a single Note: screw from the PC The plastic casing and the PC board ass'y (for board are bonded to each other. control use). Therefore, for the replacement of these parts, replace by a set of the PC board ass'y.
  • Page 365 ESIE04-01 Disassembly and Maintenance: Outdoor Units 1.2.5 Removal of PC Board Ass'y (2) Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points 2 Remove the PC board (for inverter use) Disconnect all connectors.

  • Page 366: Removal Of Low Pressure Sensor, Electronic Expansion Valve, And Others

    Disassembly and Maintenance: Outdoor Units ESIE04-01 1.2.6 Removal of Low Pressure Sensor, Electronic Expansion Valve, and Others Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points Remove the parts related to RZQ71B7V3B the outside panel and the igh pressure switch...

  • Page 367: Removal Of Thermistor

    Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points Remove the front and top RZQ71~125B7V3B panels in accordance with the Removal Procedure for Outdoor air thermistor Outside Panel and others In order to remove the...

  • Page 368: Removal Of Four Way Valve

    Disassembly and Maintenance: Outdoor Units ESIE04-01 1.2.8 Removal of Four Way Valve Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points Remove the parts related to Check to be sure there are no the outside panel and the more refrigerants left in the Body of four...

  • Page 369: Removal Of Compressor

    ESIE04-01 Disassembly and Maintenance: Outdoor Units 1.2.9 Removal of Compressor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Procedure Points Remove the parts related to RZQ71B7V3B Check to be sure there are no the outside panel and the more refrigerants left in the switch box in accordance with...

  • Page 370: Disassembly And Maintenance: Outdoor Units

    Disassembly and Maintenance: Outdoor Units ESIE04-01 5–16 Part 5 – Disassembly and Maintenance...

  • Page 371: What Is In This Chapter

    ESIE04-01 Disassembly and Maintenance: Indoor Units Part 5 Disassembly and Maintenance: Indoor Units What Is in This Chapter? Introduction This chapter contains the following information on the indoor units: Exploded views Components Disassembly procedures Exploded views and This chapter contains the following topics: components Topic See page...

  • Page 372: Fcq35B7V1 ~ Fcq71B7V3B

    Disassembly and Maintenance: Indoor Units ESIE04-01 FCQ35B7V1 ~ FCQ71B7V3B Exploded view The illustration below shows the exploded view. 5–18 Part 5 – Disassembly and Maintenance...
  • Page 373 ESIE04-01 Disassembly and Maintenance: Indoor Units Components The table below contains the components of the exploded view. Component Component Heat exchanger assy Drain pump B1.1 Branch pipe (FCQ35) Float switch B1.1 Distributor with filter Fan motor B1.2 Single union joint Casing assy B1.3 Single union joint...

  • Page 374: Fcq100~125B7V3B

    Disassembly and Maintenance: Indoor Units ESIE04-01 FCQ100~125B7V3B Exploded view The illustration below shows the exploded view. 5–20 Part 5 – Disassembly and Maintenance...
  • Page 375 ESIE04-01 Disassembly and Maintenance: Indoor Units Components The table below contains the components of the exploded view. Component Component Heat exchanger assy Fan motor B1.1 Distributor with filter Casing assy B1.2 Single union joint Inspection cover assy B1.3 Single union joint Drain pan assy B1.4 Flare nut...

  • Page 376: Fbq35~50B7V1

    Disassembly and Maintenance: Indoor Units ESIE04-01 FBQ35~50B7V1 Exploded view The illustration below shows the exploded view. 5–22 Part 5 – Disassembly and Maintenance...
  • Page 377 ESIE04-01 Disassembly and Maintenance: Indoor Units Components The table below contains the components of the exploded view. Component Component Top plate assy Plain washer Right plate assy Fitting bolt drain pump Left plate assy Fan assy Interchangeable plate 31.1 Fan top plate Small bottom plate 31.2 Fan housing bottom...

  • Page 378: Fbq60B7V1 ~ Fbq71B7V3B

    Disassembly and Maintenance: Indoor Units ESIE04-01 FBQ60B7V1 ~ FBQ71B7V3B Exploded view The illustration below shows the exploded view. 5–24 Part 5 – Disassembly and Maintenance...
  • Page 379 ESIE04-01 Disassembly and Maintenance: Indoor Units Components The table below contains the components of the exploded view. Component Component Top plate assy Plain washer Right plate assy Fitting bolt drain pump Left plate assy Fan assy Interchangeable plate 31.1 Fan top plate Small bottom plate 31.2 Fan housing bottom...

  • Page 380: Fbq100~125B7V3B

    Disassembly and Maintenance: Indoor Units ESIE04-01 FBQ100~125B7V3B Exploded view The illustration below shows the exploded view. 5–26 Part 5 – Disassembly and Maintenance...
  • Page 381 ESIE04-01 Disassembly and Maintenance: Indoor Units Components The table below contains the components of the exploded view. Component Component Top plate assy Fan assy Right plate assy 31.1 Fan top plate Left plate assy 31.2 Fan housing bottom Interchangeable plate 31.3 Fan housing top Small bottom plate...

  • Page 382: Fdq125B7V3B

    Disassembly and Maintenance: Indoor Units ESIE04-01 FDQ125B7V3B Exploded view The illustration below shows the exploded view. 5–28 Part 5 – Disassembly and Maintenance...
  • Page 383 ESIE04-01 Disassembly and Maintenance: Indoor Units Components The table below contains the components of the exploded view. Component Component Top plate assy 6.22 Thermistor Fan assy + fan mounting plate 6.23 Tie wrap with clip Side plate right 6.24 PCB assy Side plate left 6.25 Power supply transformer...
  • Page 384 Disassembly and Maintenance: Indoor Units ESIE04-01 FFQ35~60BV1B Overview This part contains the following topics: Topic See page Removal of Suction Grille. 5–31 Removal of Air Filter 5–32 Removal of Decoration Panel 5–34 Removal of Horizontal Vane 5–37 Removal of Swing Motor 5–39 Removal of Switch Box 5–41...
  • Page 385 ESIE04-01 Disassembly and Maintenance: Indoor Units 2.8.1 Removal of Suction Grille. Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Removing the suction grille To remove the suction grille, slide the two tabs simultaneously and pull the suction grille down...

  • Page 386: Removal Of Air Filter

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.8.2 Removal of Air Filter Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Removing the air filter Open the suction grille. (See "Removal of Suction Grille.".) (S2632)
  • Page 387 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points 2 Installation of the air filter Hook the air filter to the protrusions located at the top of the suction grille. Push the lower section of the air filter into the protrusions located at the bottom of the suction grille to secure the air...

  • Page 388: Removal Of Decoration Panel

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.8.3 Removal of Decoration Panel Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Removing the decoration panel Remove the switch box cover and disconnect the connector of swing motor from the harness...
  • Page 389 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points The decoration panel is Loosen the two screws attached with 4 mounting by approx. 10 mm screws. Provisional hanger Remove the two fixing screws at the switch box side first. Loosen the other two screws by approx.
  • Page 390 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Turn the provisional hanger to disengage it from the hook of switch box, and slide the decoration panel in the arrow direction to remove the panel. (S2640) (S2641) 5–36 Part 5 – Disassembly and Maintenance...

  • Page 391: Removal Of Horizontal Vane

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.8.4 Removal of Horizontal Vane Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing the decoration panel Refer to the "Removal of Decoration Panel"...
  • Page 392 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Remove the two screws for each bearing of Fixing screws horizontal vane (16 screws in total). Fixing screws (S2645) Remove the horizontal vane. (S2646) 5–38 Part 5 – Disassembly and Maintenance...

  • Page 393: Removal Of Swing Motor

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.8.5 Removal of Swing Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing the decoration panel Fixing screw Refer to the "Removal of Decoration Panel"...
  • Page 394 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Engage the swing motor-side gear with the panel-side one. (Otherwise, faulty Motor-side gear swinging operation or abnormal noise may be Panel-side gear caused.) Install the motor after checking of correct gear (S2649) engagement.

  • Page 395: Removal Of Switch Box

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.8.6 Removal of Switch Box Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove decoration panel first. Fixing screw Remove the lid of switch (M4×12) box.
  • Page 396 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Remove five pieces of lead wires from PCB on ∗ Five pieces lead wires shown below (connect to the PCB) and the switch box and lead lead wire connected to the capacitor for fan motor. wire connected to the X15A······Lead wire of float switch X17A······Lead wire of thermistor for heating...

  • Page 397: Removal Of Fan Rotor And Fan Motor

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.8.7 Removal of Fan Rotor and Fan Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the switch box. Remove the bell mouth (Two screws) A convex protrusion is...
  • Page 398 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Make sure to hold the hub as shown in Fig.1 when tightening or loosening the fan fixing nut with a spanner.To avoid deformation and vibration of the fan, do not apply excessive torque to the shroud (the slash part of Fig.2).
  • Page 399 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Pull down the fan motor slowly. (S2657) Part 5 – Disassembly and Maintenance 5–45...

  • Page 400: Removal Of Drain Pan

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.8.8 Removal of Drain Pan Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the drain socket to drain water from the drain hole.

  • Page 401: Removal Of Drain Pump

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.8.9 Removal of Drain Pump Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Removing the drain pump Remove two screws fixing float switch ass'y.
  • Page 402 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Cut the tie wrap fixing the When pulling out the drain drain hose. hose, be sure to wear safety gloves to prevent your finger Remove the screw from injury with heat exchanger fin.

  • Page 403: 2.8.10 Installation Of Drain Pump

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.8.10 Installation of Drain Pump Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Installing the drain pump Put the lead wire in the wiring groove properly, fix the drain pump ass'y with screw...
  • Page 404 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Insert the drain hose into Inserting the drain hose should the hose plug of the drain be executed before installation pump up to the root of of float switch in order to plug securely.
  • Page 405 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Insert the float switch ass'y. At this time, put the lead wires in the wiring groove properly. (S2661) Install the drain pump together with the float switch with screw When install the drain pan, put the lead wires of float switch and drain pump in wiring groove...

  • Page 406: 2.8.11 Replacement Of Heat Exchanger Thermistor

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.8.11 Replacement of Heat Exchanger Thermistor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Disconnect the grounding terminal from the header. (S2670) Pull apart the thermistor ass'y and motor lead wire...
  • Page 407 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Take out the two tie Heat resistance tie wrap is wraps fixing the anti used. Be sure to use a heat Anti sweat tube sweat tube of header and resistance tie wrap when thermistor.

  • Page 408: 2.8.12 Replacement Of Heat Exchanger

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.8.12 Replacement of Heat Exchanger Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Removing the heat exchanger Remove the refrigerant This work should be performed pipe after completion of with two personnel including...
  • Page 409 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Remove the heat exchanger. (S2677) 2 Installing the heat exchanger Groove of ceiling polystyrene foam. Insert the heat exchanger in the groove of ceiling polystyrene foam properly, and bring the tube plate section of heat exchanger into intimate contact with the polystyrene partition...
  • Page 410 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Install the heat exchanger mounting plate. Insert two thermistors. Set the lead wire with yellow tape (for heating) upper side while that with no tape (for Then cover the header by liquid) lower side.
  • Page 411 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Put the heat exchanger partition plate inside and Fan motor lead wire fix them with two screws. Heat exchanger partition plate (S2672) Fan motor lead wire Pass the thermistor ass'y through the clamps and the slit of partition plate securely as the original state.
  • Page 412 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Install the drain pan putting the lead wire of float switch and drain pump into the wire groove securely. When install the drain pan, put the lead wires in wiring groove and pass the lead wires above the black sealing material on the drain pan securely.
  • Page 413 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Install the switch box with For installation of the switch two M4 screws and one box, refer to the "Removal of M5 screw. Switch Box" on page 5-41. For re-wiring inside the switch box, refer to the "Replacement of PC Board"...

  • Page 414: 2.8.13 Replacement Of Pc Board

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.8.13 Replacement of PC Board Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Removing the PC Board Remove the switch box cover.
  • Page 415 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points 2 Installing the PC board and re-wiring inside the switch Lead wire of swing motor :X36A High roltage cable of transformer :X11A Engage the PC board Low roltage cable of transformer :X10A with two claws shown in Outdoor unit connection wire...
  • Page 416 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Re-connect the outdoor Be sure to fix the lead wire to unit connection wire, the be connected to the connector earth wire and wire of X10A for low-tension cable of Power remote controller as they transformer to the switch box transformer...
  • Page 417 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Insert the lead wires of swing flap to the connector on the PC board. Install the cover of switch box and the grille. (S2637) (S2636) Part 5 – Disassembly and Maintenance 5–63...

  • Page 418: 2.8.14 Replacement Of Receiver Section Of Wireless Remote Controller

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.8.14 Replacement of Receiver Section of Wireless Remote Controller Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Removing the receiver Transmission parts box section Remove two screws of...
  • Page 419 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Removing the decoration panel Lead wire of receiver section Refer to "Removal of Decoration Panel" Pull out the lead wire of receiver section from wiring groove. Push three claws to remove the corner cover.
  • Page 420 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Install the switch box and When install the decoration the decoration panel. panel, be careful not to catch the lead wire. Insert the lead wire of the receiver section to Tie wrap connector X1A, and bind the two wires with tie wrap.
  • Page 421 ESIE04-01 Disassembly and Maintenance: Indoor Units FHQ35~125BUV1(B) Overview This part contains the following topics: Topic See page Removal of Air Filter and Suction Grille 5–68 Removal of Electrical Parts and PC Boards 5–70 Removal of Horizontal Blade 5–73 Removal of Fan Rotor and Fan Motor 5–74 Removal of Fan Bearing 5–77...

  • Page 422: Removal Of Air Filter And Suction Grille

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.9.1 Removal of Air Filter and Suction Grille Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Push the 2 tabs and open the suction grilles.
  • Page 423 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Grip the suction grille hinge strongly and remove the suction grille. Part 5 – Disassembly and Maintenance 5–69...

  • Page 424: Removal Of Electrical Parts And Pc Boards

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.9.2 Removal of Electrical Parts and PC Boards Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure:. Step Procedure Points Loosen the 2 screws of the control box cover and remove the control box cover.
  • Page 425 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Pull down the control box and let it hang by the 2 locations in the rear. Electrical parts can now be removed. Disconnect the connector mounted on the PC board. Remove the PC board installation screw.
  • Page 426 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Slide the PC board to the left away from the tabs on the right, and remove the PC board. 5–72 Part 5 – Disassembly and Maintenance...

  • Page 427: Removal Of Horizontal Blade

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.9.3 Removal of Horizontal Blade Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Gently bend the support plate located at the center of the horizontal blade, and detach the center shaft.

  • Page 428: Removal Of Fan Rotor And Fan Motor

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.9.4 Removal of Fan Rotor and Fan Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Push the 2 tabs of the fan housing toward the inside with your fingers, and pull out the fan...
  • Page 429 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Loosen the 2 hexagon set screws of the intermediate bearing. Slide the intermediate bearing to the right and remove the fan rotor ass’y. Part 5 – Disassembly and Maintenance 5–75...
  • Page 430 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Cut off the tie-wrap of the Aconnectors glass tube cover over the Connector (1) handles high fan motor connector. voltage (220-240 V), so be Slide the glass tube and sure to turn of the power get the connector supply before disconnecting.

  • Page 431: Removal Of Fan Bearing

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.9.5 Removal of Fan Bearing Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the fan rotor according to the procedures for removing the fan rotor and fan motor.
  • Page 432 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Slide the left side panel toward the front of the unit and remove. Remove the 2 bearing installation screws and remove the bearing. 5–78 Part 5 – Disassembly and Maintenance...

  • Page 433: Removal Of Bottom Panel And Drain Pan

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.9.6 Removal of Bottom Panel and Drain Pan Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the 7 bottom panel installation screws (2 each on the left and right, 3 in the rear), and...
  • Page 434 Disassembly and Maintenance: Indoor Units ESIE04-01 Remove the drain pan retainer (2 screw). 5–80 Part 5 – Disassembly and Maintenance...

  • Page 435: Removal Of Swing Motor

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.9.7 Removal of Swing Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the screw from the right side panel. Slide the right side panel toward the front and detach it.
  • Page 436 Disassembly and Maintenance: Indoor Units ESIE04-01 2.10 FUQ71~125BUV1B Overview This part contains the following topics: Topic See page Removal of Air Filter 5–83 Removal of Suction Grille 5–84 Removal of Fan 5–86 Removal of Fan Motor 5–88 Removal of Drain Pan 5–90 Removal of Drain Pump 5–93...
  • Page 437 ESIE04-01 Disassembly and Maintenance: Indoor Units 2.10.1 Removal of Air Filter Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Opening suction grille Push two tabs on suction grille toward the center of grille at the same time.
  • Page 438 Disassembly and Maintenance: Indoor Units ESIE04-01 2.10.2 Removal of Suction Grille Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Unhook two drop-prevention strings while supporting suction grille with hand.
  • Page 439 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Disengage three hooks located at rear side of the grille to remove suction grille. Part 5 – Disassembly and Maintenance 5–85...

  • Page 440: Removal Of Fan

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.10.3 Removal of Fan Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove two mounting screws to dismount switch box cover. Remove suction air temperature thermistor attached to bell mouth.
  • Page 441 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Remove bell mouth by sliding to piping direction. To dismount fan, remove washer based nut using double-ended wrench. Remove fan by pulling down. Part 5 – Disassembly and Maintenance 5–87...
  • Page 442 Disassembly and Maintenance: Indoor Units ESIE04-01 2.10.4 Removal of Fan Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing fan motor a. Disconnect connector. b. Remove lead wire retaining plate.
  • Page 443 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Remove motor by pulling down. Part 5 – Disassembly and Maintenance 5–89...
  • Page 444 Disassembly and Maintenance: Indoor Units ESIE04-01 2.10.5 Removal of Drain Pan Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove suction grille according to the Removal of air filter and that of suction grille.
  • Page 445 ESIE04-01 Disassembly and Maintenance: Indoor Units Procedure Points Step Disconnect wires and connectors from PCB. Arrange wire harness to avoid interference with next process. Caution: This work should be done by two personnel. If drain water remain in the pan, it may drop and stain on the floor.
  • Page 446 Disassembly and Maintenance: Indoor Units ESIE04-01 Procedure Points Step Remove drain pan by pulling it down. 5–92 Part 5 – Disassembly and Maintenance...
  • Page 447 ESIE04-01 Disassembly and Maintenance: Indoor Units 2.10.6 Removal of Drain Pump Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Drain pump is located at piping side. Caution: Cut clamp material of hose, and disconnect...
  • Page 448 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Removing float switch a. Loosen three mounting screws to remove drain pump mounting base. b. Remove two screws located at opposite side of drain pump mounting base to dismount float switch. 5–94 Part 5 –...
  • Page 449 ESIE04-01 Disassembly and Maintenance: Indoor Units 2.10.7 Removal of Swing Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove suction grille according to "Removal of Suction Grille"...
  • Page 450 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Remove two screws to dismount swing motor. 5–96 Part 5 – Disassembly and Maintenance...

  • Page 451: Removal Of Air Flow Control Blade

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.10.8 Removal of Air Flow Control Blade Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points To remove horizontal blade, press down tabs located at both end of blade and pull them forward.
  • Page 452 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Remove horizontal blade. 5–98 Part 5 – Disassembly and Maintenance...
  • Page 453 ESIE04-01 Disassembly and Maintenance: Indoor Units 2.11 FAQ71BUV1B Overview This part contains the following topics: Topic See page Removal of Air Filter and Front Panel 5–100 Removal of Front Grille 5–100 Removal of the horizontal blade and vertical blade 5–103 Removal of Electrical Box 5–105 Removal of Heat Exchanger...

  • Page 454: Removal Of Air Filter And Front Panel

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.11.1 Removal of Air Filter and Front Panel Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Put your fingers on protrusions at left and right side of the unit to open the front panel.
  • Page 455 ESIE04-01 Disassembly and Maintenance: Indoor Units Step Procedure Points Disengage the holding section on upper right of the panel by pushing toward left, then slide toward right to remove the front panel. Part 5 – Disassembly and Maintenance 5–101...

  • Page 456: Removal Of Front Grille

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.11.2 Removal of Front Grille Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing the front panel in accordance with "Removal of Front Panel".

  • Page 457: Removal Of The Horizontal Blade And Vertical Blade

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.11.3 Removal of the horizontal blade and vertical blade Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points 1 Removing the horizontal blade.
  • Page 458 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points 2 Removing the vertical blade. Disengage the protrusion Holder plate on upper side of blade from holder plate. (Three Protrusion locations) Push the vertical blade backward and pull the lower side forward to disengage the blade from three hooks.

  • Page 459: Removal Of Electrical Box

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.11.4 Removal of Electrical Box Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing the front grille in accordance with "Removal of Front Grille".
  • Page 460 Disassembly and Maintenance: Indoor Units ESIE04-01 2.11.5 Removal of Heat Exchanger Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing the front grille in accordance with "Removal of Front Grille".

  • Page 461: Removal Of Fan Motor And Fan Rotor

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.11.6 Removal of Fan Motor and Fan Rotor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing the front grille in accordance with "Removal of Front Grille".

  • Page 462: Removal Of Air Swing Motor

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.11.7 Removal of Air Swing Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing the front grille in accordance with "Removal of Front Grille".

  • Page 463: Drain Hose Piping To The Left

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.11.8 Drain Hose Piping to the Left Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Removing the front grille in The drain pan and bottom accordance with "Removal frame are designed as an...
  • Page 464 Disassembly and Maintenance: Indoor Units ESIE04-01 2.12 FAQ100BUV1B Overview This part contains the following topics: Topic See page Removal of Air Filter 5–111 Removal of Slide Panel, Operation Display Cover, and Front Grille 5–112 Removal of Electrical Parts Box 5–113 Removal of PC Board 5–114 Removal of Swing Louvre Unit...
  • Page 465 ESIE04-01 Disassembly and Maintenance: Indoor Units 2.12.1 Removal of Air Filter Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Hold the air filter tabs with your hands and pull out.
  • Page 466 Disassembly and Maintenance: Indoor Units ESIE04-01 2.12.2 Removal of Slide Panel, Operation Display Cover, and Front Grille Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the left and right The wiring diagram is applied to side panels.

  • Page 467: Removal Of Electrical Parts Box

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.12.3 Removal of Electrical Parts Box Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the left and right side The left and right side panels panels, operation display have to be taken off in order to...

  • Page 468: Removal Of Pc Board

    Disassembly and Maintenance: Indoor Units ESIE04-01 2.12.4 Removal of PC Board Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the outer panels according to the procedure for "Removal of Electrical Parts Box".

  • Page 469: Removal Of Swing Louvre Unit

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.12.5 Removal of Swing Louvre Unit Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the electrical parts box according to "Removal of Electrical Parts Box".
  • Page 470 Disassembly and Maintenance: Indoor Units ESIE04-01 Step Procedure Points Remove the swing motor You can replace the swing motor from the swing Louvre without removing the swing unit. Louvre unit. 5–116 Part 5 – Disassembly and Maintenance...
  • Page 471 ESIE04-01 Disassembly and Maintenance: Indoor Units 2.12.6 Removal of Fan Motor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove side panels and Use 2.5 mm hexagon nut driver. other external casing, and electrical parts box according to their removal procedures.
  • Page 472 Disassembly and Maintenance: Indoor Units ESIE04-01 2.12.7 Removal of Drain Pan Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points If removing the drain pan: The bottom panel is fastened to Carry out pump down, the unit installation plate by 3 disconnect the transmission...
  • Page 473 ESIE04-01 Disassembly and Maintenance: Indoor Units Procedure Points Step Remove the air discharge Center of air discharge section unit. also screw fastened. (7 screws) Remove the drain pan. 1 Pull left side toward yourself. 2 Move the drain hose to the right until it comes off.
  • Page 474 Disassembly and Maintenance: Indoor Units ESIE04-01 2.12.8 Removal of Heat Exchanger Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Before dismounting a heat exchanger, make sure to Top plate proceed pump down refrigerant to outdoor unit and...

  • Page 475: Removal Of Fan Rotor

    ESIE04-01 Disassembly and Maintenance: Indoor Units 2.12.9 Removal of Fan Rotor Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure: Step Procedure Points Remove the heat exchanger You can also remove the auxiliary according to "Removal of electric heater without removing Heat Exchanger".
  • Page 476 Disassembly and Maintenance: Indoor Units ESIE04-01 5–122 Part 5 – Disassembly and Maintenance...
  • Page 477 ESIE04-01 Index Symbols "88" ................3–21 Numerics 4-way valve control .
  • Page 478 ESIE04-01 CJ ................3–52 Combination overview .
  • Page 479 ESIE04-01 exploded views indoor units....................5–17 F3 .
  • Page 480 ESIE04-01 forced operating mode..............2–6 forced thermostat OFF.
  • Page 481 ESIE04-01 locating exploded views, indoor units ..............5–17 functional diagrams ..........
  • Page 482 ESIE04-01 Pump down operation ............. . . 2–17 Pump down residual operation .
  • Page 483 ESIE04-01 technical specifications ............. . 1–43 test run checks ..............
  • Page 484 ESIE04-01 viii Index...

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