Page 1: Service Manual
ESIE05-03 Service Manual RZQ71~125B8V3B RZQ100~140B7W1B Sky-Air Inverter R-410A B series...
Page 3: Table Of Contents
ESIE05-03 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 RZQ100~140: Outlook and Dimensions ..........
Page 4 ESIE05-03 Wiring Diagrams What Is in This Chapter? ................. 1–41 RZQ71B8V3B ..................1–42 RZQ100~125B8V3B ................1–44 RZQ100~140B7W1B ................1–46 PCB Layout What Is in This Chapter? ................. 1–49 RZQ71B8V3B ..................1–50 RZQ100~125B8V3B ................1–54 RZQ100~140B7W1B ................1–58 Table of Contents...
Page 5 ESIE05-03 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 ................... 2–11 Using Conditions for Remote Controller Thermostat ......
Page 6 ESIE05-03 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 ......... 3–25 Fault-diagnosis by Wired Remote Controller ........... 3–26 Fault-diagnosis by Wireless Remote Controller........3–27 Overview of Error Codes .................
Page 7 ESIE05-03 Error Codes: Outdoor Units What Is in This Chapter? ................ 3–57 Failure of Outdoor Unit PC Board ............(E1) 3–58 Abnormal High Pressure (Detected by the HPS) ......(E3) 3–59 Actuation of Low Pressure Sensor: RZQ71B8V3B ......(E4) 3–61 Actuation of Low Pressure Switch: RZQ100~140 ......(E4) 3–63 Compressor Motor Lock ..............(E5) 3–65...
Page 8 ESIE05-03 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..................
Page 9 ESIE05-03 Part 5 Disassembly and Maintenance Disassembly and Maintenance: Outdoor Units What Is in This Chapter? ................ 5–3 RZQ71~140B ..................5–4 Table of Contents...
Page 10 ESIE05-03 viii Table of Contents...
Page 11: About This Manual
ESIE05-03 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 single and three phase, 71~140 class.
Page 12 Introduction ESIE05-03 Combination Overview RZQ71~140 The table below contains the possible combinations between indoor units and outdoor units of the Sky Air RZQ-series. MODEL NAME RZQ71B8V3B RZQ100B8V3B RZQ125B8V3B RZQ100B7W1B RZQ125B7W1B RZQ140B7W1B MODEL NAME RZQ71B8V3B RZQ100B8V3B RZQ125B8V3B RZQ100B7W1B RZQ125B7W1B RZQ140B7W1B...
Page 13 ESIE05-03 Introduction Combination Matrix Possible indoor combination Simultaneous operation Outdoor models Twin Triple Double Twin 35-35 RZQ71B8V3B (KHRQ22M20TA7) RZQ100B8V3B 50-50 35-35-35 RZQ100B7W1B (KHRQ22M20TA7) (KHRQ127H7) RZQ125B8V3B 60-60 50-50-50 35-35-35-35 RZQ125B7W1B (KHRQ22M20TA7) (KHRQ127H7) (3 x KHRQ22M20TA7) 71-71 50-50-50 35-35-35-35 RZQ140B7W1B (KHRQ22M20TA7) (KHRQ127H7)
Page 14 Introduction ESIE05-03 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 ESIE05-03 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: Refrigerant Cylinders
Introduction ESIE05-03 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
ESIE05-03 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 ESIE05-03 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 ESIE05-03 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 ESIE05-03 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 ESIE05-03 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 ESIE05-03 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 ESIE05-03 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–Specifications 1–11 3–Functional Diagrams 1–21 4–Switch Box Layout 1–37 5–Wiring Diagrams 1–41 6–PCB Layout 1–49 Part 1 – System Outline 1–1...
Page 24 ESIE05-03 1–2 Part 1 – System Outline...
Page 25: What Is In This Chapter?
ESIE05-03 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 ESIE05-03 RZQ71: Outlook and Dimensions Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions HOLE FOR ANCHOR BOLT 4-M12 Installation and See page 1–8. service space 1–4 Part 1 – System Outline...
Page 27 ESIE05-03 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: Rzq100~140: Outlook And Dimensions
General Outline: Outdoor Units ESIE05-03 RZQ100~140: Outlook and Dimensions Outlook and The illustration below shows the outlook and the dimensions of the unit (mm). dimensions HOLE FOR ANCHOR BOLT 4-M12 Installation and See page 1–8. service space 1–6 Part 1 – System Outline...
Page 29 ESIE05-03 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: Rzq71~140: Installation And Service Space
General Outline: Outdoor Units ESIE05-03 RZQ71~140: Installation and Service Space Non stacked The illustrations and table below show the required installation and service space (mm). The values between brackets are for the 100~140 class. Suction side obstacle In these cases, close the bottom of the installation frame to prevent discharged air from being Discharge side obstacle...
Page 31 ESIE05-03 General Outline: Outdoor Units Stacked The illustration below shows the required installation and service space (mm). The values in brackets are for the 100~140 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 ESIE05-03 1–10 Part 1 – System Outline...
Page 33: What Is In This Chapter?
ESIE05-03 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 2.2–RZQ71, 100 and 125 (single phase) 1–12 2.3–RZQ100, 125 and 140 (three phase) 1–16...
Page 34: Rzq71, 100 And 125 (Single Phase)
Specifications ESIE05-03 RZQ71, 100 and 125 (single phase) Technical The table below contains the technical specifications. specifications Specification RZQ71B8V3B RZQ100B8V3B RZQ125B8V3B Colour Ivory white Casing Material Painted galvanized steel plate Packing Height 900 mm 1475 mm Packing Width 980 mm...
Page 35 ESIE05-03 Specifications Specification RZQ71B8V3B RZQ100B8V3B RZQ125B8V3B Type Daphne FVC50K Daphne FVC68D Refrigerant oil Charged volume 0.8 l 1.0 l Liquid quantity Liquid type Flare connection Liquid diameter (OD) 9.52 mm Gas quantity Gas type Flare connection Gas diameter (OD) 15.9 mm...
Page 36 Specifications ESIE05-03 Electrical The table below contains the electrical specifications. specifications Specification RZQ71B8V3B RZQ100B8V3B RZQ125B8V3B Name Phase Power supply Frequency 50 Hz Voltage 230 V Zmax. List Complies to EN61000-3-11 Current Recommended fuses 20 A 32 A Mininum 207 V...
Page 37 ESIE05-03 Specifications Unit combination Power supply Compressor FCQ125DV3B RZQ125B8V3B 50-230 24.7 24.7 23.4 23.4 0.07+0.07 0.3+0.3 0.120 FCQ125B7V3B RZQ125B8V3B 50-230 25.0 25.0 23.4 23.4 0.07+0.07 0.3+0.3 0.090 FCQ60B7V1x2 RZQ125B8V3B 50-230 25.2 25.2 23.4 23.4 0.07+0.07 0.3+0.3 0.045x2 0.6x2 FCQ50B7V1x3 RZQ125B8V3B 50-230 25.8 25.8...
Page 38: Rzq100, 125 And 140 (Three Phase)
Specifications ESIE05-03 RZQ100, 125 and 140 (three phase) Technical The table below contains the technical specifications. specifications Specification RZQ100B7W1B RZQ125B7W1B RZQ140B7W1B Colour Ivory white Casing Material Painted galvanized steel plate Packing Height 1475 mm Packing Width 980 mm Packing Depth 420 mm Dimensions Unit Height...
Page 39 ESIE05-03 Specifications Specification RZQ100B7W1B RZQ125B7W1B RZQ140B7W1B Type Daphne FVC68D Refrigerant oil Charged volume 1.0 l Liquid quantity Liquid type Flare connection Liquid diameter (OD) 9.52 mm Gas quantity Gas type Flare connection Gas diameter (OD) 15.9 mm Drain quantity Drain type Hole Piping connections Drain diameter (OD)
Page 40 Specifications ESIE05-03 Electrical The table below contains the electrical specifications. specifications Specification RZQ100B7W1B RZQ125B7W1B RZQ140B7W1B Name Phase Power supply Frequency 50 Hz Voltage 400 V Zmax. List Complies to EN61000-3-11 Current Recommended fuses 20 A Mininum 360 V Voltage range Maximum 440 V Wire connections...
Page 41 ESIE05-03 Specifications Unit combination Power supply Compressor FCQ140DV3B RZQ140B7W1B 50-400 14.2 14.2 12.9 12.9 0.07+0.07 0.3+0.3 0.120 FCQ71DV3Bx2 RZQ140B7W1B 50-400 14.1 14.1 12.9 12.9 0.07+0.07 0.3+0.3 0.030x2 0.3x2 FCQ71B7V3Bx2 RZQ140B7W1B 50-400 14.7 14.7 12.9 12.9 0.07+0.07 0.3+0.3 0.045x2 0.6x2 FCQ50B7V1x3 RZQ140B7W1B 50-400 14.7...
Page 42 Specifications ESIE05-03 1–20 Part 1 – System Outline...
Page 43: What Is In This Chapter?
ESIE05-03 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 3.2–Pair System 1–22 3.3–Twin System 1–24 3.4–Triple System...
Page 44: Pair System
Functional Diagrams ESIE05-03 Pair System RZQ71 Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling 2b & 3 1–22 Part 1 – System Outline...
Page 45 ESIE05-03 Functional Diagrams RZQ100~140 Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling 2b & 3 Part 1 – System Outline 1–23...
Page 46: Twin System
Functional Diagrams ESIE05-03 Twin System RZQ71 Indoor unit Liquid piping Gas piping Outdoor unit Heating Cooling 2b & 3 NOTE: The pipes between the branch and the indoor units Indoor unit should have the same size as the indoor connections. 1–24 Part 1 –...
Page 47 ESIE05-03 Functional Diagrams RZQ100~140 Indoor unit Liquid piping Gas piping Outdoor unit Heating Cooling 2b & 3 Indoor unit NOTE: The pipes between the branch and the indoor units should have the same size as the indoor connections. Part 1 – System Outline 1–25...
Page 48: Triple System
Functional Diagrams ESIE05-03 Triple System RZQ100~140 2b & 3 Indoor unit Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling NOTE: The pipes between the branch and the indoor units should have the same size as the indoor connections. Indoor unit 1–26 Part 1 –...
Page 49: Double Twin System
ESIE05-03 Functional Diagrams Double Twin System RZQ100~140 Indoor unit Indoor unit Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling 2b & 3 Indoor unit NOTE: The pipes between the branch and the indoor units should have the same size as the indoor connections. Part 1 –...
Page 50: Pipe Connection Diameters
Functional Diagrams ESIE05-03 Pipe Connection Diameters Outdoor units The table below contains the refrigerant pipe connection diameters. ∅ Gas pipe (flare) ∅ Liquid pipe (flare) Model RZQ71B8V3B 15.9 mm 9.52 mm RZQ100B8V3B/B7W1B RZQ125B8V3B/B7W1B RZQ140B7W1B 1–28 Part 1 – System Outline...
Page 51: 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 52 Functional Diagrams ESIE05-03 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 53 ESIE05-03 Functional Diagrams Refrigerant pipe Pipe size down and pipe size up is available for main piping (L1) only. size Refrigerant pipe size Gas pipe Model Size-down Standard size Size-up φ 12.7 RZQ71 –– φ 15.9 φ 19.1 RZQ100~140 –– Liquid pipe Model Size-down...
Page 54 Functional Diagrams ESIE05-03 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 Liquid pipe size 125 & 140 Maximum allowable piping length (*) Pair: L1 size-down 10 m (15 m)
Page 55 ESIE05-03 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 56 Functional Diagrams ESIE05-03 1–34 Part 1 – System Outline...
Page 57: Piping Components
ESIE05-03 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 58 ESIE05-03 1–36 Part 1 – System Outline...
Page 59: What Is In This Chapter?
ESIE05-03 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 4.2–RZQ71B8V3B 1–38 4.3–RZQ100~125B8V3B 1–39 4.4–RZQ100~140B7W1B 1–40...
Page 60: Rzq71B8V3B
Switch Box Layout ESIE05-03 RZQ71B8V3B The illustration below shows the switch box layout: Item Description Printed circuit board (control) Printed circuit board (inverter) Terminal strip 1–38 Part 1 – System Outline...
Page 61: Rzq100~125B8V3B
ESIE05-03 Switch Box Layout RZQ100~125B8V3B The illustration below shows the switch box layout: Item Description Printed circuit board (control) Printed circuit board (inverter) Terminal strip Part 1 – System Outline 1–39...
Page 62: Rzq100~140B7W1B
Switch Box Layout ESIE05-03 RZQ100~140B7W1B The illustration below shows the switch box layout: Item Description Printed circuit board (control) Printed circuit board (inverter) Terminal strip 1–40 Part 1 – System Outline...
Page 63: Wiring Diagrams
ESIE05-03 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 5.2–RZQ71B8V3B 1–42 5.3–RZQ100~125B8V3B 1–44 5.4–RZQ100~140B7W1B...
Page 64: Rzq71B8V3B
Wiring Diagrams ESIE05-03 RZQ71B8V3B Wiring diagram The illustration below shows the wiring diagram of the unit. 71 CLASS indoor outdoor NOTE 1 EL.COMPO.ASSY FRONT VIEW A CONNECTOR PROTECTIVE EARTH (SCREW) TERMINAL TERMINAL BLK : BLACK FIELD WIRING BLU : BLUE RELAY CONNECTOR BRN : BROWN...
Page 65 ESIE05-03 Wiring Diagrams Printed circuit board Thermistor (Air) Printed circuit board (INV.) Thermistor (Coil) Push button switch Thermistor (Discharge pipe) (Forced defrost-pump down) Thermistor (Suction pipe) C1, C2, C3 Capacitor Thermistor (Power module) Dip switch Signal receiver circuit Fuse (T 6.3/250V) S1PH Pressure switch (High) HAP (A1P, A2P)
Page 66: Rzq100~125B8V3B
Wiring Diagrams ESIE05-03 RZQ100~125B8V3B Wiring diagram The illustration below shows the wiring diagram of the unit. 100-125 CLASS indoor outdoor NOTE 1 EL.COMPO.ASSY FRONT VIEW A REACTOR BOX L : LIVE BLK : BLACK N : NEUTRAL BLU : BLUE GRN : GREEN FIELD WIRING...
Page 67 ESIE05-03 Wiring Diagrams Printed circuit board Q1DI Earth leakage breaker (30mA) Printed circuit board (INV.) R1, R2 Resistor Push button switch Thermistor (Air) (Forced defrost-pump down) Thermistor (Coil) C1, C2, C3 Capacitor Thermistor (Discharge pipe) Dip switch Thermistor (Suction pipe) E1HC Crankcase heater Thermistor (Power module)
Page 68: Rzq100~140B7W1B
Wiring Diagrams ESIE05-03 RZQ100~140B7W1B Wiring diagram The illustration below shows the wiring diagram of the unit. 100-125-140 CLASS indoor outdoor NOTE 1 EL.COMPO.ASSY FRONT VIEW A REACTOR BOX L : LIVE BLK : BLACK N : NEUTRAL BLU : BLUE BRN : BROWN FIELD WIRING...
Page 69 ESIE05-03 Wiring Diagrams Printed circuit board Power supply Printed circuit board (INV.) Q1DI Earth leakage breaker (30mA) Push button switch R1 (A1P) Resistor (Forced defrost-pump down) R1, R2 (A2P) Resistor C1, C2, C3 Capacitor Thermistor (Air) Dip switch Thermistor (Coil) E1HC Crankcase heater Thermistor (Discharge pipe)
Page 70 Wiring Diagrams ESIE05-03 1–48 Part 1 – System Outline...
Page 71: Pcb Layout
ESIE05-03 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 6.2–RZQ71B8V3B...
Page 72 PCB Layout ESIE05-03 RZQ71B8V3B Control PCB The illustration below shows the PCB connectors. 1–50 Part 1 – System Outline...
Page 73 ESIE05-03 PCB Layout 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 X17A Discharge pipe thermistor X18A Suction pipe thermistor X19A Coil thermistor X20A Air thermistor X22A...
Page 74 PCB Layout ESIE05-03 Inverter PCB The illustration below shows the PCB connectors. 1–52 Part 1 – System Outline...
Page 75 ESIE05-03 PCB Layout 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 Power module thermistor Part 1 – System Outline 1–53...
Page 76 PCB Layout ESIE05-03 RZQ100~125B8V3B Control PCB The illustration below shows the PCB connectors. 1–54 Part 1 – System Outline...
Page 77 ESIE05-03 PCB Layout Connectors The table below describes the PCB connectors. Connector Connected to Description Terminal strip connector X104A (on inverter PCB) For optional PCB KRP58M51 X108A (on inverter PCB) X11A Air thermistor X12A Coil thermistor X13A Discharge pipe thermistor X14A Suction pipe thermistor X21A...
Page 78 PCB Layout ESIE05-03 Inverter PCB The illustration below shows the PCB connectors. 1–56 Part 1 – System Outline...
Page 79 ESIE05-03 PCB Layout Connectors The table below describes the PCB connectors. Connector Connected to Description X102A Compressor motor X104A X4A (on control PCB) X106A Fan motor X107A Fan motor X108A X8A (on control PCB) X111A Power module thermistor Part 1 – System Outline 1–57...
Page 80 PCB Layout ESIE05-03 RZQ100~140B7W1B Control PCB The illustration below shows the PCB connectors. 1–58 Part 1 – System Outline...
Page 81 ESIE05-03 PCB Layout Connectors The table below describes the PCB connectors. Connector Connected to Description Diode module Terminal strip connector X104A (on inverter PCB) For optional PCB KRP58M51 X108A (on inverter PCB) X109A (on inverter PCB) X11A Air thermistor X12A Coil thermistor X13A Discharge pipe thermistor...
Page 82 PCB Layout ESIE05-03 Inverter PCB The illustration below shows the PCB connectors. 1–60 Part 1 – System Outline...
Page 83 ESIE05-03 PCB Layout Connectors The table below describes the PCB connectors. Connector Connected to Description X102A Compressor motor X104A X4A (on control PCB) X106A Fan motor X107A Fan motor X108A X8A (on control PCB) X109A X9A (on control PCB) X111A Power module thermistor Part 1 –...
Page 84 PCB Layout ESIE05-03 1–62 Part 1 – System Outline...
Page 85: Functional Description
ESIE05-03 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 86 ESIE05-03 2–2 Part 2 – Functional Description...
Page 87: What Is In This Chapter?
ESIE05-03 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 88: Functions Of Thermistors
General Functionality ESIE05-03 Functions of Thermistors Locating the thermistors Remark Sensor R3T on indoor coil of FCQ35~60B7V1, FFQ35~60B7V1B, FBQ35~60B7V1 & FHQ35~60BUV1B is not used when the indoor units are connected to RZQ outdoor units. Functions of the thermistors Ther- Wiring Location Mode Function...
Page 89 ESIE05-03 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 90: Forced Operating Mode (Emergency Operation)
General Functionality ESIE05-03 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 91 ESIE05-03 General Functionality Step Action Switch ON the emergency switch on the outdoor PCB. EMERGENCY COOL HEAT Set the emergency switch on the outdoor PCB to the forced mode you prefer (Cooling or Heating). EMERGENCY COOL HEAT Turn ON the power supply. Active components Component Forced cooling...
Page 92: Outdoor Unit Identification Function
General Functionality ESIE05-03 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 93: Simulated Operation Function
ESIE05-03 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 94: Restart Standby
General Functionality ESIE05-03 Restart Standby Outline To prevent the compressor from frequently turning ON and OFF and allow pressure equalization, forced thermostat OFF will be conducted after compressor stopping (compressor guard timer). Graph Restart standby Thermostat OFF complete Compressor Moves to “Stop” or Electronic expansion valve “Starting control”...
Page 95: Automatic Restart
ESIE05-03 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 96: Using Conditions For Remote Controller Thermostat
General Functionality ESIE05-03 Using Conditions for Remote Controller Thermostat Applicable The remote control thermostat is only available in wired remote controls. Method 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. Conditions The table below contains the condition in which the remote control thermostat is not used: Condition...
Page 97 ESIE05-03 General Functionality And assuming suction temperature has changed from 30°C to 18°C (F --> A): Body thermostat sensor is used for temperatures from 30°C to 25°C (F --> D). Remote controller thermostat sensor is used for temperatures from 25°C to 21°C (D --> B). Body thermostat sensor is used for temperatures from 21°C to 18°C (B -->...
Page 98: Forced Thermostat Off
General Functionality ESIE05-03 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 99: Test Run Control
ESIE05-03 General Functionality 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 100: Way Valve Control
General Functionality ESIE05-03 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 101: Pump Down Residual Operation
ESIE05-03 General Functionality 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 102: Pump Down Operation
General Functionality ESIE05-03 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 103: Defrost Operation
ESIE05-03 General Functionality 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 104 General Functionality ESIE05-03 Defrost control Defrosting complete Defrosting start Previous control A Hz B Hz Compressor C Hz 4-way valve 150 pls A pls Motorized valve (wet protection control) 0 pls (5~60 seconds) 0 pls (15 seconds) Outdoor unit fan Indoor fan Parameters RZQ71...
Page 105 ESIE05-03 General Functionality Defrost ending The defrost cycle will be ended when one of the following conditions have been reached : conditions RZQ71 1 minute has elapsed since start of defrost operation & Outdoor unit heat exchanger temperature ≥ 10°C 10 seconds have elapsed since start of defrost operation &...
Page 106: Freeze Prevention Function
General Functionality ESIE05-03 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 107: Pmv Control
ESIE05-03 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 108: Preheating Operation Control
General Functionality ESIE05-03 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 109: Crankcase Heater Control
ESIE05-03 General Functionality 1.18 Crankcase Heater Control Applicable units RZQ100~140 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 Part 2 –...
Page 110 General Functionality ESIE05-03 2–26 Part 2 – Functional Description...
Page 111: What Is In This Chapter?
ESIE05-03 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 112: Thermostat Control
Indoor Unit Functional Concept ESIE05-03 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 113: Drain Pump Control
ESIE05-03 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 114 Indoor Unit Functional Concept ESIE05-03 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 115: Condensation Avoidance Control
ESIE05-03 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 116: Draft Avoidance Control 1
Indoor Unit Functional Concept ESIE05-03 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 117: Draft Avoidance Control 2
ESIE05-03 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 118: Fan And Flap Operations
Indoor Unit Functional Concept ESIE05-03 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 119: Indoor Unit Fan Control
ESIE05-03 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 120 Indoor Unit Functional Concept ESIE05-03 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 121: What Is In This Chapter?
ESIE05-03 Outdoor Unit Functional Concept Part 2s 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 122: Function Outline
Outdoor Unit Functional Concept ESIE05-03 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 2–39 3.2.2–Function Outline in Heating Mode 2–40 2–38 Part 2 –...
Page 123 ESIE05-03 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 124 Outdoor Unit Functional Concept ESIE05-03 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 125: Frequency Regulating Functions
ESIE05-03 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 2–42 3.3.2–General Frequency Control...
Page 126 Outdoor Unit Functional Concept ESIE05-03 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 127 ESIE05-03 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 RZQ100~140: 107 Hz Compressor RZQ71: 480 pls RZQ100~140: Motorized valve 65 pls 4 way valve Previously OFF Previously ON Ta ≤...
Page 128 Outdoor Unit Functional Concept ESIE05-03 Heating Pressure Pressure Starting equalizing equalizing control start complete complete Pressure equalizing control before compressor start Starting control RZQ71: 73 Hz RZQ100~140: 107 Hz Compressor RZQ71: 480 pls RZQ100~140: Motorized valve 65 pls 4 way valve Previously ON Previously OFF Ta >...
Page 129 ESIE05-03 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 130 Outdoor Unit Functional Concept ESIE05-03 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 RZQ100~140B 38Hz...
Page 131 ESIE05-03 Outdoor Unit Functional Concept 3.3.3 Low Pressure Protection Control (RZQ71) 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 132 Outdoor Unit Functional Concept ESIE05-03 3.3.3 Low Pressure Protection Control (RZQ100~140) Outline In order to prevent abnormal low pressures in the system, the below control function will be activated. Low pressure is detected by the low pressure switch. Flow chart (When cooling operation) (When heating operation) •...
Page 133: High Pressure Protection Control
ESIE05-03 Outdoor Unit Functional Concept 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 134 Outdoor Unit Functional Concept ESIE05-03 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 • Td < A°C • Upper limit frequency Td >...
Page 135 ESIE05-03 Outdoor Unit Functional Concept 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 136 Outdoor Unit Functional Concept ESIE05-03 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 137: Input Current Control
ESIE05-03 Outdoor Unit Functional Concept 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 138 Outdoor Unit Functional Concept ESIE05-03 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 139 ESIE05-03 Outdoor Unit Functional Concept 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 140 Outdoor Unit Functional Concept ESIE05-03 Frequency restriction in cooling Normal control Used indoor unit 125/140 Wall mounted indoor 109Hz 112Hz 139Hz Upper limit Other than wall mounted frequency 169Hz 174Hz indoor Lower limit 38Hz 41Hz frequency ≤ ≥ 20°C 21°C 125/140 Upper limit 109Hz...
Page 141 ESIE05-03 Outdoor Unit Functional Concept 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 return.To prevent damage to the compressor and in worst case avoid compressor lock, an oil recovery operation will be conducted.
Page 142: Expansion Valve Regulating Functions
Outdoor Unit Functional Concept ESIE05-03 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 2–59 3.4.2–General Expansion Valve Control 2–60 3.4.3–Discharge Pipe Temperature Control 2–61 2–58...
Page 143 ESIE05-03 Outdoor Unit Functional Concept 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 144 Outdoor Unit Functional Concept ESIE05-03 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. The discharge SH value will be used to set the target SH value.
Page 145 ESIE05-03 Outdoor Unit Functional Concept 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 146: Outdoor Unit Fan Speed Control
Outdoor Unit Functional Concept ESIE05-03 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 2–63 2–62 Part 2 – Functional Description...
Page 147 ESIE05-03 Outdoor Unit Functional Concept 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 148 Outdoor Unit Functional Concept ESIE05-03 Fan step table RZQ125~140 Cooling Heating Step 0 rpm 0 rpm 0 rpm 0 rpm 250 rpm 0 rpm 250 rpm 0 rpm 400 rpm 0 rpm 285 rpm 250 rpm 285 rpm 250 rpm 335 rpm 300 rpm 360 rpm...
Page 149 ESIE05-03 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 3–41 3–Error Codes: Outdoor Units 3–57 4–Error Codes: System Malfunctions 3–95 5–Additional Checks for Troubleshooting 3–103 Part 3 –...
Page 150 ESIE05-03 3–2 Part 3 – Troubleshooting...
Page 151: What Is In This Chapter?
ESIE05-03 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 152: General Troubleshooting Flowchart
Troubleshooting ESIE05-03 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 153: Overview Of General Problems
ESIE05-03 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 154: Equipment Does Not Operate
Troubleshooting ESIE05-03 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 155 ESIE05-03 Troubleshooting Troubleshooting Is power switch OFF or fuse for power Turn on power switch or replace fuse. switch 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. operation switch pressed Normal.
Page 156 Troubleshooting ESIE05-03 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 157 ESIE05-03 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 158 Troubleshooting ESIE05-03 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 159 ESIE05-03 Troubleshooting Troubleshooting wired Is the operation Is the type of controller Diagnose based on the error remote controller wired or lamp of remote code on remote controller wireless? flashing? Wireless Is the operation lamp of indoor unit photo-sensing section flashing? Heating: Indoor unit Cooling: Outdoor unit Malfunction of fan motor...
Page 160 Troubleshooting ESIE05-03 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 161 ESIE05-03 Troubleshooting Troubleshooting Turn the operation switch ON and OFF, then wait at ON side. Does the unit start operation Normal. Unit is in 3-min after 3 minutes? standby mode [Electric system] Power supply voltage is Contact power company within ±10 % of specified voltage.
Page 162: Equipment Operates But Does Not Provide Cooling
Troubleshooting ESIE05-03 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 163 ESIE05-03 Troubleshooting Troubleshooting Measure the temperature of suction air and supply air. Temperature difference = Suction air temp. Supply air temp. Does the Temperature heat load increase difference for cooling should Normal. after installation be between 8 and of the unit? 18 C.
Page 164: Equipment Operates But Does Not Provide Heating
Troubleshooting ESIE05-03 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 165 ESIE05-03 Troubleshooting Troubleshooting This is normal. Heating Is this first starting after operation will be conducted installation? after 2 or 3 minutes. See page 2-15 "Test Run Control" for details. Is the unit in Wait for a while. defrost mode? No abnormality Measure the temperature of suction air and supply air.
Page 166: Equipment Discharges White Mist
Troubleshooting ESIE05-03 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 the room...
Page 167 ESIE05-03 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 Faulty installation Excess charge of refrigerant Air intrudes into refrigerant system Flushing noise due to refrigerant shortage. (Sound of shoo...) Part 3 –...
Page 168 Troubleshooting ESIE05-03 Troubleshooting [Installation work side] Does the noise generate with vibration of whole Correction of installation ceilings and Reinforcement for ceilings or walls? walls Does the noise generate with vibration Insert shock absorber in of unit mounting mounting section, or strengthen section? the mounting section.
Page 169: Equipment Discharges Dust
ESIE05-03 Troubleshooting 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 Dust collected inside the indoor unit operation start again after are blown out.
Page 170 Troubleshooting ESIE05-03 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 that supply ON remote controller is normal. Indication appears for short time.
Page 171: Swing Flap Does Not Operate
ESIE05-03 Troubleshooting 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 172 Troubleshooting ESIE05-03 Troubleshooting Are the connectors correctly connected to X29A and Connect correctly. X14A on the PC board? Is the limit switch’s transfer connector Connect correctly. 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 173: Procedure Of Self-Diagnosis By Remote Controller
ESIE05-03 Troubleshooting 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 174: Fault-Diagnosis By Wired Remote Controller
Troubleshooting ESIE05-03 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 175: Fault-Diagnosis By Wireless Remote Controller
ESIE05-03 Troubleshooting 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 176 Troubleshooting ESIE05-03 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 177 ESIE05-03 Troubleshooting 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 178 Troubleshooting ESIE05-03 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 179: Overview Of Error Codes
ESIE05-03 Troubleshooting 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) Swing flap motor lock Abnormal drain water level Activation of float switch during compressor off.
Page 180 Troubleshooting ESIE05-03 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 181: Troubleshooting By Led Indications
ESIE05-03 Troubleshooting 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 182 Troubleshooting ESIE05-03 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 183: Troubleshooting By Remote Controller Display / Led Display
ESIE05-03 Troubleshooting 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 184 Troubleshooting ESIE05-03 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 — — Outdoor unit P.C board malfunc- 3–58 tion —...
Page 185: System Malfunctions
ESIE05-03 Troubleshooting 1.9.3 System malfunctions 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 3–96 or UF indoor and outdoor unit) —...
Page 186: Overview Of The Outdoor Safety Devices
Troubleshooting ESIE05-03 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 RZQ140 3–38 Part 3 – Troubleshooting...
Page 187: Overview Of The Indoor Safety Devices
ESIE05-03 Troubleshooting 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. FCQ35~71B >130°C +/-5°C <83°C +/-20°C N.A. FCQ100/125B >140°C +/-5°C <45°C +/-15°C N.A. FBQ35~125 N.A. N.A. >152°C FDQ125 N.A.
Page 188 Troubleshooting ESIE05-03 3–40 Part 3 – Troubleshooting...
Page 189: Error Codes: Indoor Units
ESIE05-03 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 190: Malfunctioning Indoor Pcb
Error Codes: Indoor Units ESIE05-03 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 191: Malfunction Of Drain Water Level System
ESIE05-03 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 192 Error Codes: Indoor Units ESIE05-03 Troubleshooting Begin Is the the short Is the optional drain Connect the circuit connector unit a cassette raising mechanism Short-circuit connected to X15A on or built-in connected? connector. the indoor unit type? PCB? Check the continuity of the short-circuit connector.
Page 193: Malfunctioning Drain System
ESIE05-03 Error Codes: Indoor Units 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 194 Error Codes: Indoor Units ESIE05-03 Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. 3–46 Part 3 – Troubleshooting...
Page 195: Indoor Unit Fan Motor Lock
ESIE05-03 Error Codes: Indoor Units 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 196 Error Codes: Indoor Units ESIE05-03 Troubleshooting Check the connections of X20A and X26A. X20A and X26A Connect properly X20A and X26A correctly. connected? Unplug X26A and switch the power supply on. Check the voltage between pins 1 and 3 of X26A. Replace indoor there about unit PCB.
Page 197: Swing Flap Motor Malfunction / Lock
ESIE05-03 Error Codes: Indoor Units Swing Flap Motor Malfunction / Lock (A7) Error code LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is detected by the limit switch when the motor turns. When ON/OFF of the microswitch for position detection cannot be reversed eventhough the swing flap motor is energized for a specified amount of time (about 30 seconds).
Page 198 Error Codes: Indoor Units ESIE05-03 Troubleshooting the connectors correctly connected to Connect correctly. X29A and X14A on the PC board? Is 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...
Page 199: Malfunctioning Capacity Setting
ESIE05-03 Error Codes: Indoor Units 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 200 Error Codes: Indoor Units ESIE05-03 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 into X23A of the adapter that matches the indoor unit capacity of the unit into X23A.
Page 201: Thermistor Abnormality
ESIE05-03 Error Codes: Indoor Units 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 202 Error Codes: Indoor Units ESIE05-03 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 Correct contact contact OK? C4: Indoor liquid pipe thermistor (R2T).
Page 203: Malfunctioning Remote Controller Air Thermistor
ESIE05-03 Error Codes: Indoor Units 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 204: Humidity Sensor System Malfunction
Error Codes: Indoor Units ESIE05-03 2.10 Humidity Sensor System Malfunction (CC) 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 humidity sensor becomes disconnected or shorted while the unit is running.
Page 205: What Is In This Chapter?
ESIE05-03 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 206 Error Codes: Outdoor Units ESIE05-03 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 207 ESIE05-03 Error Codes: Outdoor Units 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 RZQ71~140...
Page 208 Error Codes: Outdoor Units ESIE05-03 Troubleshooting Check the installation conditions. Is the stop valve open? Open the stop valve. control and protection HPS connected to outdoor unit Connect correctly. PC board? (Note) Turn off the power supply. Wait for 10 minutes after compressor stops operating, then check the following.
Page 209 ESIE05-03 Error Codes: Outdoor Units Actuation of Low Pressure Sensor: RZQ71B8V3B (E4) Remote Controller Display Method of Actual value of the low pressure is continuously measured using the low pressure sensor. Malfunction Detection Malfunction Error is generated when the low pressure is dropped under specific pressure. Decision Conditions Supposed Causes...
Page 210 Error Codes: Outdoor Units ESIE05-03 Outdoor unit PC board A1P X64A (blue) Black Microcomputer White A/D input ∗2 Measure voltage (DC) within this space. (V2972) *2 Refer to Low pressure sensor, check on page 3–115. Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Page 211 ESIE05-03 Error Codes: Outdoor Units Actuation of Low Pressure Switch: RZQ100~140 (E4) Error code Method of The protection device circuit checks continuity in the low pressure switch. Malfunction Detection Error generation The error is generated when the low-pressure switch is activated during compressor operation. Causes The possible causes are: Malfunctioning refrigerant piping circuit...
Page 212 Error Codes: Outdoor Units ESIE05-03 Troubleshooting To troubleshoot, proceed as follows: Check the installation conditions. Is the stop Open the stop valve. valve open? Is the LPS correctly Connect correctly. connected to the outdoor unit PCB? · Turn the power OFF and back ON after 2 or 3 minutes.
Page 213 ESIE05-03 Error Codes: Outdoor Units 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 214 Error Codes: Outdoor Units ESIE05-03 Troubleshooting Check the installation conditions. Is the stop valve Open the stop valve. open? Is the UVWN wiring Connect correctly. normal? Is high pressure higher Remedy the cause. than 2.6 MPa at starting? Check and see whether compressor is Replace the compressor.
Page 215 ESIE05-03 Error Codes: Outdoor Units 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 216 Error Codes: Outdoor Units ESIE05-03 Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. 3–68 Part 3 – Troubleshooting...
Page 217 ESIE05-03 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 218 Error Codes: Outdoor Units ESIE05-03 Troubleshooting Turn the power supply off once and back on. Normal reset? Problem could be caused by external factor (noise, etc.) other than malfunction. Is the electronic expansion valve coil Connect correctly. connected to outdoor unit PC board? With remote controller...
Page 219 ESIE05-03 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 220 Error Codes: Outdoor Units ESIE05-03 Troubleshooting Is the discharge pipe Abnormality in refrigerant system such temperature high? as gas shortage, faulty compressor, etc. (See *1.) Conduct inspection Is the discharge pipe thermistor correctly Connect correctly, and operate the unit connected to PCB again.
Page 221 ESIE05-03 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 222 Error Codes: Outdoor Units ESIE05-03 3.11 Abnormal Low Pressure Switch (H4) Applicable model RZQ100~140 Remote Controller Display Method of Check the continuity of LPS Malfunction LPS is not operated when the low pressure is dropped under specific pressure (0.12MPa). Detection Malfunction When there is no continuity in the LPS during compressor start operating.
Page 223 ESIE05-03 Error Codes: Outdoor Units Troubleshooting Is LPS connector connected to Connect correctly. outdoor PC board? (∗1) Turn off the power supply. After 10 minutes, check the following. Check 5.8 Is low pressure Correct the refrigerant pipe. abnormally low? Is there continuity in control Replace the LPS.
Page 224 Error Codes: Outdoor Units ESIE05-03 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 225 ESIE05-03 Error Codes: Outdoor Units 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 226 Error Codes: Outdoor Units ESIE05-03 Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. 3–78 Part 3 – Troubleshooting...
Page 227 ESIE05-03 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 Detection Malfunction When the temperature of the inverter radiation fin increases abnormally due to faulty heat dissipation. Decision Conditions Supposed Causes...
Page 228 Error Codes: Outdoor Units ESIE05-03 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 229 ESIE05-03 Error Codes: Outdoor Units Troubleshooting Check the installation conditions. Is the stop valve open? Open the stop valve. Is the compressor coil Replace the compressor. disconnected or is the insulation defective? Turn the main power supply off, and then disconnect the connection between the compressor and inverter.
Page 230 Error Codes: Outdoor Units ESIE05-03 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 231 ESIE05-03 Error Codes: Outdoor Units Troubleshooting Is the secondary current of the inverter higher than ∗A (see below) Compressor overload Inspection of the compressor and for each refrigerant system is required. phase? Turn the main power supply off, and then disconnect the connection between the compressor and inverter.
Page 232 Error Codes: Outdoor Units ESIE05-03 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 233 ESIE05-03 Error Codes: Outdoor Units Troubleshooting Check the installation conditions. Is the stop valve open? Open the stop valve. Is the difference between high and low pressure Insufficient pressure equalization before startup not more Check refrigerant system. than 0.2MPa? Turn the main power supply off, and then disconnect the connection between the compressor and inverter.
Page 234 Error Codes: Outdoor Units ESIE05-03 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 235 ESIE05-03 Error Codes: Outdoor Units Troubleshooting Is the fan motor connector Connect the connector, and turn connected? on again. connectors connecting the Connect the transmission wiring, control and inverter PC and turn on again. board connected securely? Is the transmission wiring between the control and inverter Fix the disconnection, and turn...
Page 236 Error Codes: Outdoor Units ESIE05-03 3.19 Open Phase or Power Supply Voltage Imbalance (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 237 ESIE05-03 Error Codes: Outdoor Units Troubleshooting Check LED on the outdoor unit PC board Other factors than open phase (Open phase?) Open phase of power supply voltage? Field factors Is the voltage imbalance between phases Field factors large? (Note) Target : ±10V between phases, R-S, S-T, T-R Replace the MS.
Page 238 Error Codes: Outdoor Units ESIE05-03 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 239 ESIE05-03 Error Codes: Outdoor Units 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 240 Error Codes: Outdoor Units ESIE05-03 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 electronic expansion valve opening degree and measured temperatures and pressures.
Page 241: Abnormal Power Supply Voltage ................................................... (U2)
ESIE05-03 Error Codes: Outdoor Units 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 242 Error Codes: Outdoor Units ESIE05-03 Troubleshooting Check LED on outdoor unit PC board. (Is the Other factors voltage insufficient?) 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 243: Error Codes: System Malfunctions
ESIE05-03 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 244: Malfunction Of Transmission Between Indoor And Outdoor Unit
Error Codes: System Malfunctions ESIE05-03 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 245 ESIE05-03 Error Codes: System Malfunctions Troubleshooting 2 From the preceding page Is the HAP NO (ON or OFF) blinking? Turn OFF the power supply Check the normal once and then ON again. HAP of the microcomputer for outdoor unit. Is the HAP blinking? Reset to normal.
Page 246: Malfunction Of Transmission Between Indoor Unit And Remote Controller
Error Codes: System Malfunctions ESIE05-03 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 247: Malfunction Of Transmission Between Main Remote Controller
ESIE05-03 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 248: Malfunctioning Field Setting Switch
Error Codes: System Malfunctions ESIE05-03 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 249 ESIE05-03 Error Codes: System Malfunctions Troubleshooting Is the remote controller connected to more than Connect the remote controller one indoor correctly. unit? the outdoor unit Check setting "No. of used for Twin Connected Twin System Indoor system? Units" of indoor unit. Is the setting of Set correctly.
Page 250: Centralized Address Setting Error
Error Codes: System Malfunctions ESIE05-03 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 251: Additional Checks For Troubleshooting
ESIE05-03 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–Outdoor unit: Checking the Installation Condition 3–104 5.3–Outdoor Unit: Checking the Expansion Valve...
Page 252: Outdoor Unit: Checking The Installation Condition
Additional Checks for Troubleshooting ESIE05-03 Outdoor unit: Checking the Installation Condition Checking To check the installation condition, proceed as follows: Check the spaces for all air passage around the suction and discharge areas. Is the Change the minimum space installation location. rescpected? Does the discharged air from...
Page 253: Outdoor Unit: Checking The Expansion Valve
ESIE05-03 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 254: Checking The Thermistors
Additional Checks for Troubleshooting ESIE05-03 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 255: Resistance Conversion Table (Ambient, Coil, Fin)
ESIE05-03 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 256: R3T: Resistance Conversion Table (Discharge Pipe Sensor)
Additional Checks for Troubleshooting ESIE05-03 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 257: Evaluation Of Abnormal High Pressure
ESIE05-03 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 258: Evaluation Of Abnormal Low Pressure
Additional Checks for Troubleshooting ESIE05-03 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 259: Checks
ESIE05-03 Additional Checks for Troubleshooting Checks 5.9.1 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 260 Additional Checks for Troubleshooting ESIE05-03 5.9.2 Outdoor Unit: Fan Motor Signal Line For RZQ71~140 models (1) Turn the power supply off. (2) With the fan motor connector disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table. 1 White Measurement point Judgment...
Page 261 ESIE05-03 Additional Checks for Troubleshooting 5.9.3 Outdoor unit: Fan Speed Pulse For RZQ71~140 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 262 Additional Checks for Troubleshooting ESIE05-03 5.9.4 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 263 ESIE05-03 Additional Checks for Troubleshooting 5.9.5 Outdoor unit: Check Low Pressure Sensor Measure the voltage (DC) between pins 2 and 3 of the connector. For RZQ71 models Outdoor unit PC board (Blue) „ ƒ Black Low pressure sensor ‚ Microcomputer White A/D input ...
Page 264 Additional Checks for Troubleshooting ESIE05-03 3–116 Part 3 – Troubleshooting...
Page 265 ESIE05-03 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 4–35 Part 4 – Commissioning and Test Run 4–1...
Page 266 ESIE05-03 4–2 Part 4 – Commissioning and Test Run...
Page 267: What Is In This Chapter?
ESIE05-03 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 268: Test Run Checks
Pre-Test Run Checks ESIE05-03 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% for 1-phase units 400 V ±...
Page 269: Setting The Wireless Remote Controller
ESIE05-03 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 270 Pre-Test Run Checks ESIE05-03 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 271 ESIE05-03 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 272 Pre-Test Run Checks ESIE05-03 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 273: What Is In This Chapter?
ESIE05-03 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 274: How To Change The Field Settings With The Wired Remote Controller
Field settings ESIE05-03 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 (BRC1D527)
Page 275 ESIE05-03 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 276: How To Change The Field Settings With The Wireless Remote Controller
Field settings ESIE05-03 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 277: Overview Of The Field Settings On The Indoor Units
ESIE05-03 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 278: Overview Of The Factory Settings On The Indoor Units
Field settings ESIE05-03 Overview of the Factory Settings on the Indoor Units Factory settings The table below contains the factory settings of all indoor units Mode First Second code No. code No. FCQ-B FCQ-D 10 or 20 — — 11 or 21 12 or 22 —...
Page 279: Main/Sub Setting When Using Two Remote Controllers
ESIE05-03 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 280: Setting The Centralized Group No
Field settings ESIE05-03 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 281 ESIE05-03 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 4–17...
Page 282: The Field Setting Levels
Field settings ESIE05-03 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 283 ESIE05-03 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 FCQ-B FCQ-D – – Changing the mode To enter the monitoring level and to change the maintenance mode settings, proceed as follows: settings...
Page 284 Field settings ESIE05-03 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 285: Overview Of The Field Settings On The Outdoor Units
ESIE05-03 Field settings 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 286 Field settings ESIE05-03 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 287: Overview Of The Factory Settings On The Outdoor Units
ESIE05-03 Field settings 2.10 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 RZQ140 Part 4 – Commissioning and Test Run 4–23...
Page 288: Silent Operation
Field settings ESIE05-03 2.11 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) 2.11.1 Silent Operation by Automatic control Table Silent operation can be set by field setting from the wired remote controller: Descrip-...
Page 289 ESIE05-03 Field settings 2.11.2 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 290: I-Demand Function
Field settings ESIE05-03 2.12 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 291 ESIE05-03 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 4–27...
Page 292: Setting For Low Humidity Application
Field settings ESIE05-03 2.13 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 293 ESIE05-03 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 294 Field settings ESIE05-03 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 (see note) target acceptable area...
Page 295 ESIE05-03 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 (see note) target acceptable area Indoor temp.
Page 296 Field settings ESIE05-03 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 (see note) target acceptable area Indoor temp.
Page 297 ESIE05-03 Field settings Capacity When "low humidity application" is selected. Field setting 16(26)-2-03: Indoor 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 298: Defrost Start Setting
Field settings ESIE05-03 2.14 Defrost Start Setting See ‘Defrost Operation’ on page 2-19. 4–34 Part 4 – Commissioning and Test Run...
Page 299 ESIE05-03 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 4–36 3.2–Operation Range 4–39 Part 4 –...
Page 300: General Operation Data
Test Run and Operation Data ESIE05-03 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 301 ESIE05-03 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 302 Test Run and Operation Data ESIE05-03 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 303: Operation Range
ESIE05-03 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 304 Test Run and Operation Data ESIE05-03 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. 4–40 Part 4 –...
Page 305 ESIE05-03 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 Part 5 – Disassembly and Maintenance 5–1...
Page 306 ESIE05-03 5–2 Part 5 – Disassembly and Maintenance...
Page 307 ESIE05-03 Disassembly and Maintenance: Outdoor Units Part 5 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–RZQ71~140B 5–4 Part 5 –...
Page 308 Disassembly and Maintenance: Outdoor Units ESIE05-03 RZQ71~140B 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 Removal of PC Board Ass'y (2) 5–11...
Page 309 ESIE05-03 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 RZQ71B8V3B the lower parts (in 7 Hooks places) frontward, disengage the hooks at...
Page 310: Removal Of Propeller Fan And Fan Motor
Disassembly and Maintenance: Outdoor Units ESIE05-03 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 311: Removal Of Switch Box
ESIE05-03 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 312 Disassembly and Maintenance: Outdoor Units ESIE05-03 Step Procedure Points Unscrew the 2 screws that fix the switch box. Hook Hook Hook 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 313 ESIE05-03 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 314 Disassembly and Maintenance: Outdoor Units ESIE05-03 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 315 ESIE05-03 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 316 Disassembly and Maintenance: Outdoor Units ESIE05-03 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 RZQ71B8V3B the outside panel and the switch box in accordance with...
Page 317 ESIE05-03 Disassembly and Maintenance: Outdoor Units 1.2.7 Removal of Thermistor 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 RZQ71~140B panels in accordance with the Removal Procedure for Outdoor air thermistor Outside Panel and others...
Page 318: Removal Of Four Way Valve
Disassembly and Maintenance: Outdoor Units ESIE05-03 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 319: Removal Of Compressor
ESIE05-03 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 RZQ71B8V3B Check to be sure there are no the outside panel and the more refrigerants left in the switch box in accordance with...
Page 320 Disassembly and Maintenance: Outdoor Units ESIE05-03 5–16 Part 5 – Disassembly and Maintenance...
Page 321 ESIE05-03 Index Symbols "88" ................3–22 Numerics 4-way valve control .
Page 322 ESIE05-03 components functional diagrams ............1–21 PCB layout.
Page 323 ESIE05-03 Failure of Capacity Setting ............3–91 Failure of outdoor unit PCB .
Page 324 ESIE05-03 Malfunction Code and LED Display Table Indoor Unit ..............3–35 Outdoor Unit .
Page 325 ESIE05-03 Remote Controller Display Malfunction Code and Contents ........3–31 safety devices indoor .
Page 326 ESIE05-03 U0 ................3–92 U2 .

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Rzq71b8v3b Rzq125b7w1b Rzq125b8v3b Rzq140b7w1b Rzq100b7w1b

Daikin RZQ100B8V3B Service Manual

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