Daikin E-Series Service Manual
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Daikin E-Series Service Manual

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Table of Contents

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Service
Manual
E-Series
[Applied Models]
!Super Multi Plus: Heat Pump
SiENBE18-621

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Summary of Contents for Daikin E-Series

  • Page 1 SiENBE18-621 Service Manual E-Series [Applied Models] !Super Multi Plus: Heat Pump...
  • Page 2 SiENBE18-621 SUPER MULTI PLUS E-Series !Heat Pump Indoor Unit FTXS20D3VMW(L) FDXS25CAVMB FLXS25BAVMB FFQ25B8V1B FTXS25D3VMW(L) FDXS35CAVMB FLXS35BAVMB FFQ35B8V1B FTXS35D3VMW(L) FDXS50CVMB FLXS50BAVMB FFQ50B8V1B FTXS50D2V1W(L) FDXS60CVMB FLXS60BAVMB FFQ60B8V1B FTXS20CAVMB FDXS25EAVMB FVXS25BAVMB FHQ35BVV1B FTXS25CAVMB FDXS35EAVMB FVXS35BAVMB FHQ50BVV1B FTXS35CAVMB FVXS50BAVMB FHQ60BVV1B FTXS50EV1B FTXS60EV1B FTXS71EV1B FTXS71BAVMB...

  • Page 3: Table Of Contents

    SiENBE18-621 1. Introduction ................... vii 1.1 Safety Cautions ..................vii Part 1 List of Functions ..............1 1. List of Functions ..................2 Part 2 Specifications ..............9 1. Specifications ..................10 1.1 Outdoor Units ..................10 1.2 BP Unit ....................11 1.3 Indoor Units ....................12 Part 3 Printed Circuit Board Connector Wiring Diagram ...
  • Page 4 SiENBE18-621 3.4 Pump-down Residual Operation ............71 3.5 Restart Standby..................71 3.6 Stopping Operation ................72 4. Protection Control .................73 4.1 High Pressure Protection Control............73 4.2 Low Pressure Protection Control............74 4.3 Discharge Pipe Protection Control ............75 4.4 Inverter Protection Control ..............76 4.5 Freeze-up Protection Control ..............77 4.6 Dew Condensation Prevention Control ..........78 5.
  • Page 5 SiENBE18-621 5. Test Operation and Field Setting for RA Indoor Unit......146 5.1 Test Operation from the Remote Control ..........146 5.2 Jumper Settings ...................147 Part 7 System Configuration............. 149 1. System Configuration................150 1.1 Operation Instructions ................150 2. Instruction....................151 2.1 RMXS Series..................151 2.2 Wall Mounted, Duct, Floor/Ceiling, Floor Standing Type .....152 2.3 Ceiling Mounted Cassette Type ............227 2.4 Ceiling Suspended Type ..............238...
  • Page 6 SiENBE18-621 6. Troubleshooting for BP Unit ..............300 6.1 Malfunction of Electronic Expansion Valve ..........300 6.2 Faulty BP Unit PCB ................301 6.3 Faulty BP Liquid or Gas Pipe Thermistor ..........302 6.4 Transmission Error between Indoor Unit and BP Unit......303 6.5 Transmission Error between Outdoor Unit and BP Unit.......305 6.6 Check ....................306 7.
  • Page 7 SiENBE18-621 8. Check ....................352 9. Thermistor Resistance / Temperature Characteristics......355 10.Pressure Sensor .................357 11.Method of Replacing The Inverter’s Power Transistors Modules..358 Part 9 Appendix................. 361 1. Piping Diagrams..................362 1.1 Outdoor Units ..................362 1.2 BP Units ....................363 1.3 Indoor Units ..................364 2.

  • Page 8: Introduction

    SiENBE18-621 1. Introduction Safety Cautions " Be sure to read the following safety cautions before conducting repair work. Cautions and " The caution items are classified into “ Warnings Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.

  • Page 9: Cautions Regarding Products After Repair

    Introduction SiENBE18-621 Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

  • Page 10: Inspection After Repair

    SiENBE18-621 Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.

  • Page 11: Using Icons

    Introduction SiENBE18-621 Warning Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire. Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.

  • Page 12: Part 1 List Of Functions

    SiENBE18-621 Part 1 List of Functions 1. List of Functions ..................2 List of Functions...

  • Page 13: List Of Functions

    List of Functions SiENBE18-621 1. List of Functions Category Functions Category Functions Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — Virustatic Functions –5 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Basic Function –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 14 SiENBE18-621 Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — — Virustatic Functions Operation Limit for Cooling (°CDB) — — — Basic Operation Limit for Heating (°CWB) — — — Photocatalytic Deodorizing Filter —...
  • Page 15 List of Functions SiENBE18-621 Category Functions Category Functions Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — — Virustatic Functions Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — — Basic Air Purifying Filter with Photocatalytic Function Operation Limit for Heating (°CWB) —...
  • Page 16 SiENBE18-621 Category Functions Category Functions Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — — — Virustatic Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — — Basic Air Purifying Filter with Photocatalytic Function Operation Limit for Heating (°CWB) —...
  • Page 17 List of Functions SiENBE18-621 Category Functions Category Functions Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) Virustatic Functions Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter Basic Function Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 18 SiENBE18-621 Category Functions Category Functions Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — — Virustatic Functions Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — — Basic Air Purifying Filter with Photocatalytic Function Operation Limit for Heating (°CWB) —...
  • Page 19 List of Functions SiENBE18-621 List of Functions...

  • Page 20: Part 2 Specifications

    SiENBE18-621 Part 2 Specifications 1. Specifications ..................10 1.1 Outdoor Units ..................10 1.2 BP Unit ....................11 1.3 Indoor Units ....................12 Specifications...

  • Page 21: Specifications

    Specifications SiENBE18-621 1. Specifications Outdoor Units 50Hz 230V Model RMXS112E7V3B RMXS140E7V3B RMXS160E7V3B Cooling Capacity 11.2 (9,630) 14.0 (12,040) 15.5 (13,330) (kcal/h) Heating Capacity 12.5 (10,750) 16.0 (13,760) 17.5 (15,050) (kcal/h) Total Indoor Unit Capacity 5.5~14.5 7.0~18.2 8.0~20.8 Power Consumption — Running Current —...

  • Page 22: Bp Unit

    SiENBE18-621 BP Unit 50Hz 230V Model BPMKS967B2B BPMKS967B3B Connectable Indoor Units 1~2 Units 1~3 Units Casing Color Paintingless Power Consumption Running Current 0.05 0.05 Refrigerant Type R-410A Dimension (H×W×D) 180×294(650)*×350 Package Dimension (H×W×D) 257×738×427 Machine Weight Gross Weight Number of Wiring Connections 4 for Interunit Wiring Main : φ9.5×1 / Branch : φ6.4×2 Main : φ9.5×1 / Branch : φ6.4×3...

  • Page 23: Indoor Units

    Specifications SiENBE18-621 Indoor Units Wall Mounted Type 50Hz 230V FTXS20D3VMW FTXS20D3VML Model Cooling Heating Cooling Heating Rated Capacity 2.0kW Class 2.0kW Class Front Panel Color White Silver Line 8.7 (307) 9.4 (332) 8.7 (307) 9.4 (332) 6.7 (237) 7.6 (268) 6.7 (237) 7.6 (268) m³/min...
  • Page 24 SiENBE18-621 50Hz 230V FTXS35D3VMW FTXS35D3VML Model Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 3.5kW Class Front Panel Color White Silver Line 8.9 (314) 9.7 (342) 8.9 (314) 9.7 (342) 6.9 (244) 7.9 (279) 6.9 (244) 7.9 (279) m³/min Air Flow Rates (cfm) 4.8 (169) 6.0 (212)
  • Page 25 Specifications SiENBE18-621 50Hz 230V FTXS20CAVMB FTXS25CAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 7.7 (272) 7.8 (275) 7.7 (272) 7.8 (275) 5.9 (208) 6.5 (230) 5.9 (208) 6.5 (230) m³/min Air Flow Rates (cfm) 4.2 (148) 5.3 (187)
  • Page 26 SiENBE18-621 50Hz 230V FTXS60EV1B FTXS71EV1B Model Cooling Heating Cooling Heating Rated Capacity 6.0kW Class 7.1kW Class Front Panel Color White White 16.2 (572) 17.4 (614) 17.4 (614) 19.7 (695) 13.6 (480) 15.1 (533) 14.6 (515) 16.6 (586) m³/min Air Flow Rates (cfm) 11.4 (402) 12.7 (448)
  • Page 27 Specifications SiENBE18-621 Duct Connected Type 50Hz 230V FDXS25CAVMB FDXS35CAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 9.5 (335) 10.0 (353) 10.0 (353) 8.8 (311) 8.8 (311) 9.3 (328) 9.3 (328) m³/min Air Flow Rates (cfm)
  • Page 28 SiENBE18-621 50Hz 230V FDXS25EAVMB FDXS35EAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 8.7 (307) 8.7 (307) 8.7 (307) 8.7 (307) 8.0 (282) 8.0 (282) 8.0 (282) 8.0 (282) m³/min Air Flow Rates (cfm) 7.3 (258) 7.3 (258)
  • Page 29 Specifications SiENBE18-621 Floor / Ceiling Suspended Dual Type 50Hz 230V FLXS25BAVMB FLXS35BAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 9.2 (325) 8.6 (304) 9.8 (346) 6.8 (240) 8.3 (293) 7.6 (268) 8.9 (314)
  • Page 30 SiENBE18-621 Floor Standing Type 50Hz 230V FVXS25BAVMB FVXS35BAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White Air Flow Rates 8.1 (286) 9.2 (325) 8.3 (293) 9.2 (325) 6.2 (219) 7.0 (247) 6.3 (222) 7.1 (251) m³/min...

  • Page 31: Ceiling Mounted Cassette Type

    Specifications SiENBE18-621 Ceiling Mounted Cassette Type 50Hz 230V FFQ25B8V1B FFQ35B8V1B Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Color White White Decoration Panel Dimensions (H×W×D) 55×700×700 55×700×700 9.0 (318) 9.0 (318) 10.0 (353) 10.0 (353) — — —...
  • Page 32 SiENBE18-621 Ceiling-suspended Type 50Hz 230V FHQ35BVV1B FHQ50BVV1B FHQ60BVV1B Model Cooling Heating Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 5.0kW Class 6.0kW Class Color White White White Decoration Panel Dimensions (H×W×D) — — — 13.0 (458) 13.0 (458) 13.0 (458) 13.0 (458) 17.0 (600) 16.0 (565)
  • Page 33 Specifications SiENBE18-621 Specifications...

  • Page 34: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiENBE18-621 Part 3 Printed Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram ..........24 1.1 Outdoor Unit RMXS 112/140/160 E7V3B ..........24 1.2 Branch Provider Unit ................29 1.3 Wall Mounted Type 20/25/35/50 Class - D Series .........30 1.4 Wall Mounted Type 20/25/35 Class - C Series ........33 1.5 Wall Mounted Type 50/60/71 Class - E(B) Series........35 1.6 Duct Connected Type................37 1.7 Floor / Ceiling Suspended Dual Type.............39...

  • Page 35: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram SiENBE18-621 1. Printed Circuit Board Connector Wiring Diagram Outdoor Unit RMXS 112/140/160 E7V3B 1.1.1 Main PCB (A1P) Connectors 1) X5A Connector to Service PCB (A2P) 2) X11A Connector for Outdoor Air Thermistor 3) X12A Connector for Thermistors (Suction Pipe1, 2, Heat Exchanger, Discharge Pipe) 4) X13A...
  • Page 36 SiENBE18-621 Printed Circuit Board Connector Wiring Diagram PCB Detail X106A X107A X111A X66A X37A X81A X22A X21A X13A X11A X12A X18A X17A X32A X25A X26A X27A X28A 2P175758 Printed Circuit Board Connector Wiring Diagram and Name...
  • Page 37 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 1.1.2 Service PCB (A2P) Connectors 1) X205A Connector for Main PCB (A1P) Note: Other Designation 1) H1P to H8P Service Monitor LED 2) BS1 to BS5 Push Button Switch (Mode, Set, Return, Test, Reset) 3) DS1 DIP Switch PCB Detail...
  • Page 38 SiENBE18-621 Printed Circuit Board Connector Wiring Diagram 1.1.3 Noise Filter PCB (A3P) Connectors 1) LA, NA Terminal for X1M (Power Supply) 2) LB, NB Terminal for Main PCB (A1P) 3) E Terminal for Earth Note: Other Designation 1) F1U Fuse (250V 6.3A) PCB Detail 2P174186 Printed Circuit Board Connector Wiring Diagram and Name...
  • Page 39 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 1.1.4 Cool / Heat Selector PCB (A4P) Connectors 1) X1A Connector for Main PCB (A1P) Note: Other Designation 1) X1M Cool / Heat Selector PCB Detail 2P174187 Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 40: Branch Provider Unit

    SiENBE18-621 Printed Circuit Board Connector Wiring Diagram Branch Provider Unit Connectors 1) X20A Connector for Bypass Electronic Expansion Valve 2) X21A to X23A Connector for Electronic Expansion Valve to Room A, B and C 3) X90A Connector for Thermistors Note: Other Designations 1) F2U Fuse (AC250V 3.15A)

  • Page 41: Wall Mounted Type 20/25/35/50 Class - D Series

    Printed Circuit Board Connector Wiring Diagram SiENBE18-621 Wall Mounted Type 20/25/35/50 Class - D Series Connectors PCB(1) (Control PCB) 1) S1 Connector for DC fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S21 Connector for centralized control (HA) 4) S26 Connector for display PCB 5) S28...
  • Page 42 SiENBE18-621 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB 20/25/35 class LED A (R4986) Printed Circuit Board Connector Wiring Diagram and Name...
  • Page 43 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 50 class LED A (R4288) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R5183) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4291) Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 44: Wall Mounted Type 20/25/35 Class - C Series

    SiENBE18-621 Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 20/25/35 Class - C Series Connectors PCB(1) (Control PCB) 1) S1 Connector for fan motor 2) S6 Connector for swing motor (Horizontal Flap) 3) S7 Connector for AC fan motor 4) S21 Connector for centralized control to 5 rooms 5) S26...
  • Page 45 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 PCB Detail PCB(1): Control PCB PCB(2): Signal Receiver PCB PCB(3): INTELLIGENT EYE Sensor PCB PCB (1) Control LED 1 LED 2 PCB (2) Signal receiver Pb Free LED 3 5V Check Pb Free 12V Check PCB (3) INTELLIGENT EYE...

  • Page 46: Wall Mounted Type 50/60/71 Class - E(B) Series

    SiENBE18-621 Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 50/60/71 Class - E(B) Series Connectors PCB(1) (Control PCB) 1) S1 Connector for DC fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S8 Connector for swing motor (vertical blades) 4) S21 Connector for centralized control (HA) 5) S26...
  • Page 47 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 PCB Detail PCB(1): Control PCB (indoor unit) LED A (R2860) PCB(2): Signal Receiver PCB PCB(3): Buzzer PCB (R2861) RTH1 (R2862) PCB(4): Display PCB PCB(5): Intelligent Eye sensor PCB LED1 LED2 LED3 (R2863) (R2864) Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 48: Duct Connected Type

    SiENBE18-621 Printed Circuit Board Connector Wiring Diagram Duct Connected Type Connectors PCB(1) (Control PCB) 1) S1 Connector for AC fan motor 2) S7 Connector for AC fan motor 3) S21 Connector for centralized control to 5 rooms 4) S26 Connector for display PCB 5) S32 Connector for heat exchanger thermistor PCB(2) (Display PCB)
  • Page 49 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 PCB Detail PCB (2): Display PCB LED3 LED2 RTH1 Pb Free LED1 2P084375 Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 50: Floor / Ceiling Suspended Dual Type

    SiENBE18-621 Printed Circuit Board Connector Wiring Diagram Floor / Ceiling Suspended Dual Type Connectors PCB(1) (Control PCB) 1) S6 Connector for swing motor (horizontal swing) 2) S7 Connector for AC fan motor 3) S21 Connector for centralized control 4) S24 Connector for display PCB 5) S26 Connector for signal receiver PCB...
  • Page 51 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 PCB Detail PCB (1): Control PCB PCB Detail PCB (2): Power Supply PCB Printed Circuit Board Connector Wiring Diagram and Name...
  • Page 52 SiENBE18-621 Printed Circuit Board Connector Wiring Diagram PCB (3): Display PCB PCB (4): Signal Receiver PCB EX511 REV 12 PHOTO 2P084377- 1 S31(RTH) (R4977) Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 53: Floor Standing Type

    Printed Circuit Board Connector Wiring Diagram SiENBE18-621 Floor Standing Type Connectors PCB(1) (Power Supply PCB) 1) S8, S202, Connector for control PCB S204 PCB(2) (Control PCB) 1) S6 Connector for swing motor and lower air outlet motor 2) S21 Connector for centralized control 3) S23 Connector for display PCB 4) S31, S32...
  • Page 54 SiENBE18-621 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Power Supply PCB Printed Circuit Board Connector Wiring Diagram and Name...
  • Page 55 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 PCB Detail PCB (2): Control PCB PCB (3): Display PCB PCB (4): Signal Receiver PCB Pb Free Pb Free Pb Free Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 56: Ceiling Mounted Cassette 600×600 Type

    SiENBE18-621 Printed Circuit Board Connector Wiring Diagram Ceiling Mounted Cassette 600×600 Type Connectors 1) X5A Connector for Terminal Strip (for Wired Remote Control) 2) X15A Connector for Float Switch 3) X17A Connector for Heat Exchanger Thermistor (2) 4) X18A Connector for Heat Exchanger Thermistor (1) 5) X19A Connector for Room Temperature Thermistor 6) X20A...
  • Page 57 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 PCB Detail X20A X25A X27A X11A X10A X33A X18A Capacity setting adaptor X19A X61A X60A X36A (Service monitor LED) X17A X15A 2P095006 X24A X35A Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 58: Ceiling Suspended Type

    SiENBE18-621 Printed Circuit Board Connector Wiring Diagram 1.10 Ceiling Suspended Type Connectors 1) X5A Connector for Terminal Strip (for Wired Remote Control) 2) X14A Connector for Limit Switch (for Swing Flap) 3) X15A Connector for Drain Pump (Optional Accessory) 4) X17A Connector for Heat Exchanger Thermistor (2) 5) X18A Connector for Heat Exchanger Thermistor (1)
  • Page 59 Printed Circuit Board Connector Wiring Diagram SiENBE18-621 PCB Detail Capacity setting adaptor X19A X18A X40A X15A X14A X17A X61A X35A X60A X33A (Service monitor LED) X24A X26A X29A X27A X20A X25A 2P095007 Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 60: Part 4 Refrigerant Circuit

    SiENBE18-621 Part 4 Refrigerant Circuit 1. Refrigerant Circuit .................50 1.1 Outdoor Units ..................50 1.2 BP Units ....................52 2. Functional Parts Layout ................53 2.1 Outdoor Units ..................53 3. Refrigerant Flow for Each Operation Mode...........54 3.1 Cooling Operation ..................54 3.2 Heating Operation ..................55 3.3 Cooling Oil Return Operation ..............56 3.4 Heating Oil Return Operation &...

  • Page 61: Refrigerant Circuit

    Refrigerant Circuit SiENBE18-621 1. Refrigerant Circuit Outdoor Units No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 36 Hz and 195 Hz by using Inverter compressor (INV) the inverter. 31 steps Since the system is of air heat exchanging type, the fan is operated at 8-step rotation Inverter fan speed by using the inverter.
  • Page 62 SiENBE18-621 Refrigerant Circuit Refrigerant Circuit Diagram C : 3D052627A Refrigerant Circuit...

  • Page 63: Bp Units

    Refrigerant Circuit SiENBE18-621 BP Units No. in refrigerant Symbol Name Major Function system diagram Electronic expansion valve Among EVA, EVB and EVC, the electronic expansion valve of operating room is called (for operating room) EVU. Electronic expansion valve Among EVA, EVB and EVC, the electronic expansion valve of stopping room is called (for stopping room) EVT.

  • Page 64: Functional Parts Layout

    SiENBE18-621 Functional Parts Layout 2. Functional Parts Layout Outdoor Units Birds-eye view Solenoid valve (Connector color: black) Reactor lead wire (High voltage) Solenoid valve lead wire (Connector color: black) (High voltage) Pressure sensor (high) (Connector color: red) 4 way valve lead wire 4 way valve (Connector color: blue) (Connector color: blue)

  • Page 65: Refrigerant Flow For Each Operation Mode

    Refrigerant Flow for Each Operation Mode SiENBE18-621 3. Refrigerant Flow for Each Operation Mode Cooling Operation Refrigerant Circuit...

  • Page 66: Heating Operation

    SiENBE18-621 Refrigerant Flow for Each Operation Mode Heating Operation Refrigerant Circuit...

  • Page 67: Cooling Oil Return Operation

    Refrigerant Flow for Each Operation Mode SiENBE18-621 Cooling Oil Return Operation Refrigerant Circuit...

  • Page 68: Heating Oil Return Operation & Defrost Operation

    SiENBE18-621 Refrigerant Flow for Each Operation Mode Heating Oil Return Operation & Defrost Operation Refrigerant Circuit...
  • Page 69 Refrigerant Flow for Each Operation Mode SiENBE18-621 Refrigerant Circuit...

  • Page 70: Part 5 Function

    SiENBE18-621 Part 5 Function 1. Operation Mode ..................60 2. Basic Control..................61 2.1 Normal Operation ...................61 2.2 Compressor PI Control................62 2.3 Electronic Expansion Valve PI Control...........65 2.4 Cooling Operation Fan Control...............66 3. Special Control..................67 3.1 Startup Control ..................67 3.2 Oil Return Operation ................68 3.3 Defrosting Operation ................70 3.4 Pump-down Residual Operation ............71 3.5 Restart Standby..................71...

  • Page 71: Operation Mode

    Operation Mode SiENBE18-621 1. Operation Mode Operation in stop mode Indoor unit stop or Indoor unit thermostat ON thermostat OFF Malfunction/Standby Restart standby (Compressor stop) Pressure equalization prior to startup Malfunction/ Standby Indoor unit stop or Startup control thermostat OFF Cooling startup Pump-down •...

  • Page 72: Basic Control

    SiENBE18-621 Basic Control 2. Basic Control Normal Operation " Cooling Operation Actuator Operation Remarks Used for high pressure protection control, low pressure protection control, discharge pipe Compressor Compressor PI control temperature protection control, and compressor operating frequency upper limit control with inverter protection control.

  • Page 73: Compressor Pi Control

    Basic Control SiENBE18-621 Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] Controls compressor capacity to adjust Te to Te : Low pressure equivalent saturation achieve target value (TeS).
  • Page 74 SiENBE18-621 Basic Control ΔD Control Receiving the capacity request signal from the indoor unit, the outdoor unit corrects its target pressure for capacity control. Controls ΔD signal from indoor unit as follows. UP control : When the UP command come from more than one indoor unit among thermostat-ON indoor units.
  • Page 75 Basic Control SiENBE18-621 Heating Operation TcS = TcS initial value + KTc2 KTc2 : Correction value by ΔD signal in heating. KTe2 = 0 (without correction) During compressor frequency PI Not during compressor frequency PI control (KTe2 = 0) control Δ...

  • Page 76: Electronic Expansion Valve Pi Control

    SiENBE18-621 Basic Control Electronic Expansion Valve PI Control Main Electronic Expansion Valve EV1 Control Carries out the electronic expansion valve (Y1E) PI control to maintain the evaporator outlet superheated degree (SH) at constant during heating operation to make maximum use of the outdoor unit heat exchanger (evaporator).

  • Page 77: Cooling Operation Fan Control

    Basic Control SiENBE18-621 Cooling Operation Fan Control In cooling operation with low outdoor air temperature, this control is used to provide the adequate amount of circulation air with liquid pressure secured by high pressure control using outdoor unit fan. Furthermore, when outdoor temperature ≥ 20°C, the compressor will run in Step 7 or higher. When outdoor temperature ≥...

  • Page 78: Special Control

    SiENBE18-621 Special Control 3. Special Control Startup Control This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor. In addition, to avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four way valve is also determined.

  • Page 79: Oil Return Operation

    Special Control SiENBE18-621 Oil Return Operation Oil flown from the compressor to the side of system is collected by oil-returning operation, in case of that oil in the compressor runs down. 3.2.1 Oil Return Operation in Cooling Operation [Conditions to start] The cooling oil-returning operation is started referring following conditions.
  • Page 80 SiENBE18-621 Special Control 3.2.2 Oil Return Operation in Heating Operation [Conditions to start] The heating oil-returning operation is started referring following conditions. $ Integrated amount of displaced oil $ Timer (After the power is turned on, integrated operating-time is 2 hours and subsequently every 8 hours.) In addition, integrated amount of displaced oil is derived from Tc, Te, and the compressor load.

  • Page 81: Defrosting Operation

    Special Control SiENBE18-621 Defrosting Operation The defrost operation is performed to solve frost on the outdoor unit heat exchanger when heating, and the heating capacity is recovered. [Conditions to start] The defrost operation is started referring following conditions. $ Outdoor heat exchanger heat transfer co-efficiency $ Temperature of heat-exchange (Tb) $ Low pressure equivalent saturation temperature (Te) $ Timer (2 hours at the minimum)

  • Page 82: Pump-Down Residual Operation

    SiENBE18-621 Special Control Pump-down Residual Operation When activating compressor, if the liquid refrigerant remains in the heat-exchanger, the liquid enters into the compressor and dilutes oil therein resulting in decrease of lubricity. Therefore, the pump-down residual operation is performed to collect the refrigerant in the heat- exchanger when the compressor is down.

  • Page 83: Stopping Operation

    Special Control SiENBE18-621 Stopping Operation Operation of the actuator when the system is down, is cleared up. 3.6.1 When System is in Stop Mode Actuator Operation Compressor Outdoor unit fan Four way valve Keep former condition. Main electronic expansion valve (EV1) 0 pls Subcooling electronic expansion valve (EV3) 0 pls...

  • Page 84: Protection Control

    SiENBE18-621 Protection Control 4. Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure. [In cooling operation] Pc>3.47MPa High pressure not limited...

  • Page 85: Low Pressure Protection Control

    Protection Control SiENBE18-621 Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] Low pressure not limited Pe: LP pressure sensor detection value Pe<0.25MPa Pe>0.39MPa Low pressure Hot gas SVP = OFF limited Pe<0.15MPa...

  • Page 86: Discharge Pipe Protection Control

    SiENBE18-621 Protection Control Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. [INV compressor] Discharge pipe protection HTdi : Value of INV compressor discharge pipe control not limited temperature (Tdi) compensated with outdoor air temperature...

  • Page 87: Inverter Protection Control

    Protection Control SiENBE18-621 Inverter Protection Control Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase. [Inverter overcurrent protection control] Not limited • Inverter current≤23.8A &...

  • Page 88: Freeze-Up Protection Control

    SiENBE18-621 Protection Control Freeze-up Protection Control Outline According to the freeze prevention status sent from the BP unit. The compressor output frequency is regulated to decrease the compressor capacity in order to prevent the indoor heat exchanger from freezing. Detail Zones are produced based on the freeze prevention status signal sent from the BP unit (Indoor unit), and the freeze prevention control prevents freezing of the indoor unit.

  • Page 89: Dew Condensation Prevention Control

    Protection Control SiENBE18-621 Dew Condensation Prevention Control Outline According to the dew condensation prevention status sent from the BP unit. The compressor output frequency is regulated to decrease the compressor capacity in order to prevent the indoor unit from dew condensation. Detail Zones are produced based on the dew condensation prevention status signal sent from the BP unit (Indoor unit), and the dew condensation prevention control prevents dew condensation of...

  • Page 90: Other Control

    SiENBE18-621 Other Control 5. Other Control Demand Operation In order to save the power consumption, the capacity of outdoor unit is saved with control forcibly by using “Demand 1 Setting”. To operate the unit with this mode, additional setting of “Continuous Demand Setting” or external input by external control adapter is required.

  • Page 91: Bp Unit Control

    BP Unit Control SiENBE18-621 6. BP Unit Control BP Unit Command Conversion 1. ΔD (room temperature − temperature setting) signals from BP units are converted to capacity up / down signal. ΔD signals from BP units are used as the capacity up / down signal in frequency commands (excludes when Powerful function is in operation).

  • Page 92: Bp Unit Electronic Expansion Valve Control

    SiENBE18-621 BP Unit Control BP Unit Electronic Expansion Valve Control Purpose of the This function provides instructions regarding the absolute flow rate, relative flow rate and fully Function closing from the outdoor unit to the BP unit in order to ensure outdoor unit compressor safety and optimum refrigerating cycle of the system.

  • Page 93: Full Closing Of Electronic Expansion Valves

    BP Unit Control SiENBE18-621 6.2.3 Full Closing of Electronic Expansion Valves Purpose of the The electronic expansion valves are initialized when the power is turned on. Function Details The following processes are conducted. 1. Conducts P1 pulses close when power is turned on, and sets current opening to 0 pulse (fully closing process).

  • Page 94: Sh Control In Cooling Operation

    SiENBE18-621 BP Unit Control SH Control in Cooling Operation Purpose of the This function ensures appropriate refrigerant distribution when many room units are operating in Function the cooling mode. Outline The heat exchanger temperatures and gas pipe temperatures of operating room units are detected by the gas pipe thermistors, and the electronic expansion valves' flow rates are corrected so as to adjust the difference between heat exchanger temperature and gas pipe temperature of each room unit (hereafter referred to as SH) close to the target values.

  • Page 95: Sc Control In Heating Operation

    BP Unit Control SiENBE18-621 Note: 1. In Sky Air models, the indoor units are equipped with distribution capillary tubes ; therefore, the heat exchangers may superheat even when the condition is met. 2. In Sky Air models, the heat exchanger intermediate position is provided on the liquid connection pipe side;...

  • Page 96: Indoor Unit (Ra Models)

    SiENBE18-621 Indoor Unit (RA Models) 7. Indoor Unit (RA Models) Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing Power-airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum Dual Flaps control area in cooling, heating and dry mode. Heating Mode During heating mode, the large flap enables direct warm air straight downwards.

  • Page 97: Fan Speed Control For Indoor Units

    Indoor Unit (RA Models) SiENBE18-621 Fan Speed Control for Indoor Units Control Mode The airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through phase control and Hall IC control. For more information about Hall IC, refer to the troubleshooting for fan motor on page 273.

  • Page 98: Programme Dry Function

    SiENBE18-621 Indoor Unit (RA Models) Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and air flow volume, the temperature adjustment and fan adjustment buttons are inoperable in this mode. In Case of The microcomputer automatically sets the temperature and fan settings.

  • Page 99: Automatic Operation

    Indoor Unit (RA Models) SiENBE18-621 Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote control, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode.

  • Page 100: Thermostat Control

    SiENBE18-621 Indoor Unit (RA Models) Thermostat Control Thermostat control is based on the difference between the room temperature and the setpoint. Thermostat OFF Condition $ The temperature difference is in the zone A. Thermostat ON Condition $ The temperature difference is above the zone C after being in the zone A. $ The system resumes from defrost control in any zones except A.

  • Page 101: Night Set Mode

    Indoor Unit (RA Models) SiENBE18-621 Night Set Mode When the OFF timer is set, the Night Set circuit automatically activates. The Night Set circuit maintains the airflow setting made by users. The Night Set The Night Set circuit continues heating or cooling the room at the set temperature for the first Circuit one hour, then automatically raises the temperature setting slightly in the case of cooling, or lowers it slightly in the case of heating, for economical operations.

  • Page 102: Econo Mode

    SiENBE18-621 Indoor Unit (RA Models) ECONO Mode Outline FTXS20-50D The "ECONO mode" reduces the maximum operating current and power consumption by approx. 30% during start up etc.. This mode is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.

  • Page 103: Intelligent Eye

    Indoor Unit (RA Models) SiENBE18-621 INTELLIGENT EYE This is the function that detects existence of humans in the room by a human motion sensor (INTELLIGENT EYE) and reduces the capacity when there is no human in the room in order to save electricity.
  • Page 104 SiENBE18-621 Indoor Unit (RA Models) " Since the set temperature is shifted by 2°C higher for 40 minutes, compressor speed becomes low and can realize energy saving operation. But as thermostat is prone to be off by the fact that the set temperature has been shifted, the thermostat-off action is prohibited in 40 minutes so as to prevent this phenomena.

  • Page 105: Home Leave Operation

    Indoor Unit (RA Models) SiENBE18-621 HOME LEAVE Operation Outline In order to respond to the customer's need for immediate heating and cooling of the room after returning home or for house care, a measure to switch the temperature and air volume from that for normal time over to outing time by one touch is provided.

  • Page 106: Inverter Powerful Operation

    SiENBE18-621 Indoor Unit (RA Models) 7.10 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When POWERFUL button is pushed in each operation mode, the fan speed / setting Control temperature will be converted to the following states in a period of twenty minutes.

  • Page 107: Other Functions

    Indoor Unit (RA Models) SiENBE18-621 7.11 Other Functions 7.11.1 Hot Start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the air flow is stopped or is made very weak thereby carrying out comfortable heating of the room.
  • Page 108 SiENBE18-621 Indoor Unit (RA Models) 7.11.7 Air Purifying Filter with Photocatalytic Deodorizing Function This filter incorporates the benefits the Air Purifying Filter and Photocatalytic Deodorizing Filter in a single unit. Combining the two filters in this way increases the active surface area of the new filter.

  • Page 109: Indoor Unit (Skyair Models)

    Indoor Unit (SkyAir Models) SiENBE18-621 8. Indoor Unit (SkyAir Models) Function Outline FFQ-B, FHQ-B (Input) (Output) Indoor Unit Thermostat Control Two thermostats used, suction Suction Sensor(R1T) and remote control. Fan Motor Monitoring Function Drain Pump Heat Exchanger Sensor Cool/Heat Automatic Optional for FHQ (R2T) Function...

  • Page 110: Electric Function Parts

    SiENBE18-621 Indoor Unit (SkyAir Models) Electric Function Parts FFQ – B8V1B Capacity Remarks Wired remote control BRC1C517 Optional Accessory Infrared remote Heat pump BRC7EA530W Optional control Accessory Cooling only BRC7EA531W Electronic control unit [2P095006-8] EC0608 Fan motor [3P104408-1] 4P 55W Fan motor capacitor 4μF [440VAC] Float switch...

  • Page 111: Function Details

    Indoor Unit (SkyAir Models) SiENBE18-621 Function Details Thermostat Control Initial setting Set temperature Cooling thermostat ON Cooling thermostat OFF Heating thermostat OFF Heating thermostat ON Freeze-up The thermostat turns OFF under the following temperature conditions to prevent freezing of the Protection indoor unit heat exchanger.
  • Page 112 SiENBE18-621 Indoor Unit (SkyAir Models) Condensation Avoidance Continuous 30 minutes operation of cooling One hour drying Control (FHQ Only) After continuous 30 minutes of operation with downward The unit operation can be reset with changing operation horizontal blade position, change the blade position to mode into "heating"...
  • Page 113 Indoor Unit (SkyAir Models) SiENBE18-621 1-2 Operations when an occurrence of water level abnormality 1-2-a) Behavior between occurrence and recovery of water level abnormality After compressor stops due to water level abnormality, drain pump is operated intermittently, i.e. 5 min ON, 5 sec OFF and 5 min ON.
  • Page 114 SiENBE18-621 Indoor Unit (SkyAir Models) 2. Heating 2-1 Basic operation In heating operation of the unit equipped with a humidifier, when "Interlocking of drain pump / humidifier" (15(25)-3) is set to "yes" (02), the drain pump operates 20-min OFF and 3-min ON repeatedly during compressor is in operation.
  • Page 115 Indoor Unit (SkyAir Models) SiENBE18-621 2-2-a)-2 When a water level abnormality occurs during drain pump OFF The abnormality is determined when 80 seconds elapse from compressor stop. Other than above, behavior is same as 2-2-a). Occurrence of drain water level abnormality Intermittent operation (*1) 5min 5min...
  • Page 116 SiENBE18-621 Indoor Unit (SkyAir Models) Using Conditions (Applicable models: FHQ & FFQ only) for Remote Remote control thermostat is equipped only in wired remote control. Even when “use remote control thermostat” is selected in service mode, the remote control Control thermostat may not be used.
  • Page 117 Indoor Unit (SkyAir Models) SiENBE18-621 Program Dry The points of thermostat ON or OFF are determined according to the suction air temperature at Operation the startup of unit operation. The set temperature and flow rate are not displayed on remote control. Function Operation startup Thermostat...
  • Page 118 SiENBE18-621 Indoor Unit (SkyAir Models) Fan and Flap Operations Flap Remote Control FHQ & FFQ Indication Heating Hot Start from Defrost In Swing Horizontal Swing Operation Operation In Airflow Horizontal Set Position Direction Setting Defrost In Swing Horizontal Swing Operation In Airflow Horizontal Set Position...
  • Page 119 Indoor Unit (SkyAir Models) SiENBE18-621 Mode Conflict [Overview] While the indoor unit for another room and the outdoor unit are operating, when the indoor unit for the own room is activated, the operation mode which can be selected in the own room has some restrictions as mentioned below.
  • Page 120 SiENBE18-621 Indoor Unit (SkyAir Models) Non-operating [Overview] Room Dew After operating an indoor unit for the own room in the cooling mode or dry mode, stop the unit using the remote control. Under the condition, when an unit for another room is started Prevention Fan operation in the heating mode, the fan in the own room may rotate in the LL mode even though Control...
  • Page 121 Indoor Unit (SkyAir Models) SiENBE18-621 Function...

  • Page 122: Part 6 Test Operation

    SiENBE18-621 Part 6 Test Operation 1. Test Operation ..................112 1.1 Procedure and Outline .................112 2. Outdoor Unit PCB Layout..............117 3. Field Setting ..................118 3.1 Field Setting from Outdoor Unit............118 3.2 Detail of Setting Mode ................127 4. Field Setting for SkyAir Indoor Unit .............136 4.1 Explanation...................136 4.2 Field Setting ..................137 4.3 Initial Setting Contents .................138...

  • Page 123: Test Operation

    Test Operation SiENBE18-621 1. Test Operation Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check work prior to turn power supply on # Is the power supply single-phase 220-230V / 50Hz? Check the below items. # Have you finished a ductwork to drain? 2Power wiring # Have you detach transport fitting?
  • Page 124 SiENBE18-621 Test Operation 1.1.3 Judging and reprogramming in case of redundant BP addresses The BP unit of this system is provided with specific addresses in its production stage. These addresses are used to conduct various controls. If by any chance (on 3 out of 260000 units) these addresses are redundant, the system may get in trouble.
  • Page 125 Test Operation SiENBE18-621 Example of DIP switch (DS2) settings on the BP unit's PCB DS2-1 DS2-2 DS2-3 DS2-4 BP unit 1 BP unit 2 BP unit 3 DS1~4 : Factory setting is OFF. The BP unit 1 through 3 show the first through third unit, respectively. The order of these units is flexible.

  • Page 126: Check Operation

    SiENBE18-621 Test Operation 1.1.7 Check Operation * During check operation, mount front panel to avoid the misjudging. * Check operation is mandatory for normal unit operation. (When the check operation is not executed, alarm code "U3" will be displayed.) Press and hold the TEST The test operation is started automatically.
  • Page 127 Test Operation SiENBE18-621 1.1.8 Confirmation on Normal Operation • Conduct normal unit operation after the check operation has been completed. (When outdoor air temperature is 30°CDB or higher, the unit can not be operated with heating mode. See the installation manual attached.) •...

  • Page 128: Outdoor Unit Pcb Layout

    SiENBE18-621 Outdoor Unit PCB Layout 2. Outdoor Unit PCB Layout Outdoor Unit PCB (The LED indicator status shown at left LED indicator status : Turn off : Turn on : Flicker : Turn on or off indicates the status at factory set.) Curing range Reactor Cover this range with...

  • Page 129: Field Setting

    Field Setting SiENBE18-621 3. Field Setting Field Setting from Outdoor Unit 3.1.1 Setting by Dip Switches The following field settings are made by dip switches on PC board. Dipswitch Setting item Description Setting Cool / Heat Used to set cool / heat change over setting by remote DS1-1 change over control equipped with outdoor unit.
  • Page 130 SiENBE18-621 Field Setting Caution DIP switch Setting after changing the main PCB(A1P) to spare parts PCB When you change the main PCB(A1P) to spare parts PCB, please carry out the following setting. Please Attach the Capacity Setting Adapter corresponding to Capacity Class (ex. 112, 140, 160) in connector X51A. (See Below) Capacity Setting Adapter Capacity Class...
  • Page 131 Field Setting SiENBE18-621 " Setting by pushbutton switches The following settings are made by pushbutton switches on PCB. LED indication (Factory setting) MODE RETURN TEST RESET (V2760) There are the following three setting modes. % Setting mode 1 (H1P off) Initial status (when normal) : Also indicates during “abnormal”.
  • Page 132 SiENBE18-621 Field Setting a. “Setting mode 1” This mode is used to set and check the following items. 1. Set items ············ In order to make COOL/HEAT selection in a batch of outdoor unit group, change the setting. • COOL/HEAT selection (IND) ·····················Used to select COOL or HEAT by individual outdoor unit (factory set).
  • Page 133 Field Setting SiENBE18-621 b. “Setting mode 2” Setting item Description Cool/heat unified Sets address for cool/heat unified operation. Push and hold the MODE (BS1) address button for 5 seconds and set to Low noise/demand Address for low noise/demand operation “Setting mode 2”. address Used to conduct test operation without making changes Test operation...
  • Page 134 SiENBE18-621 Field Setting Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set 8777777 ∗ Address Binary number 8777778 Cool / Heat Unified address (6 digits) 8788888 8777777 ∗ Address Binary number 8777778 Low noise/demand address...
  • Page 135 Field Setting SiENBE18-621 Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set Level 1 (outdoor fan with 8 step or lower) 8777778 8777787 ∗ 25 Low noise setting Level 2 (outdoor fan with 7 step or lower) Level 3 (outdoor fan with 6 step or lower) 8777877 About 20:00...
  • Page 136 SiENBE18-621 Field Setting c. Monitor mode LED display Setting item Data display To enter the monitor mode, push the 9 7 7 7 7 7 7 Various setting See below MODE (BS1) button when in “Setting 9 7 7 7 7 7 8 C/H unified address mode 1”.
  • Page 137 Field Setting SiENBE18-621 Push the SET button and match with the LEDs No. 1 - 15, push the RETURN button, and confirm the data for each setting. H Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: The No.

  • Page 138: Detail Of Setting Mode

    SiENBE18-621 Field Setting Detail of Setting Mode 3.2.1 Cool / Heat Mode Switching There are the following 4 cool/heat switching modes. % Set cool/heat separately for each outdoor unit system by indoor unit remote control. & Set cool/heat separately for each outdoor unit system by cool/heat switching remote control. ' Set cool/heat for more than one outdoor unit system simultaneously in accordance with unified master outdoor unit by indoor unit remote control.
  • Page 139 Field Setting SiENBE18-621 & Set Cool / Heat Separately for Each Outdoor Unit System by Cool/Heat Switching Remote Control ) It does not matter whether or not there is outdoor - outdoor unit wiring. ) Set outdoor unit PC board DS1-1 to OUT (factory set). ) Set cool/heat switching to IND (individual) for “Setting mode 1”...
  • Page 140 SiENBE18-621 Field Setting 3.2.2 Setting of Low Noise Operation and Demand Operation Setting of Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adapter (optional), you can lower operating noise by 2-3 dB. When the low noise operation is carried out automatically at night (The external control adapter for outdoor unit is not required) 1.
  • Page 141 Field Setting SiENBE18-621 Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adapter (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. Set item Condition Content Demand...
  • Page 142 SiENBE18-621 Field Setting Detailed Setting Procedure of Low Noise Operation and Demand Control 1. Setting mode 1 (H1P off) % In setting mode 2, push the BS1 (MODE button) one time. → Setting mode 1 is entered and H1P off. During the setting mode 1 is displayed, “In low noise operation”...
  • Page 143 Field Setting SiENBE18-621 : ON : OFF : Blink & Setting Setting Setting No. indication Setting No. indication Setting Setting contents indication (Initial setting) contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P External low noise /...
  • Page 144 SiENBE18-621 Field Setting 3.2.3 Setting of Refrigerant Additional Charging Operation Refrigerant additional charging operation procedure e, make sure When the outdoor unit is stopped and the entire quantity of refrigerant cannot be charged from the stop valve on the liquid sid to charge the remaining quantity of refrigerant using this procedure.
  • Page 145 Field Setting SiENBE18-621 3.2.4 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective expansion valve of indoor and outdoor units All indoor and outdoor unit’s operation are prohibited. % In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” Operation to ON.
  • Page 146 SiENBE18-621 Field Setting 3.2.6 Check Operation To prevent any trouble in the period of installation at site, the system is provided with a test operation mode enabling check for incorrect wiring, stop valve left in closed, coming out (or misplacing with suction pipe thermistor) of discharge pipe thermistor and judgment of piping length, refrigerant overcharging, and learning for the minimum opening degree of electronic expansion valve.

  • Page 147: Field Setting For Skyair Indoor Unit

    Field Setting for SkyAir Indoor Unit SiENBE18-621 4. Field Setting for SkyAir Indoor Unit Explanation Field set is carried out from the remote control. At time of installation, or after maintenance inspection/repair, carry out field set according to the explanation below. Incorrect settings will cause a malfunction to occur.

  • Page 148: Field Setting

    SiENBE18-621 Field Setting for SkyAir Indoor Unit Field Setting 4.2.1 Wired Remote Control Note: (Field setting must be made from the remote control in accordance with the installation conditions.) " Setting can be made by changing the “Mode number”, “FIRST CODE NO.”, and “SECOND CODE NO.”.

  • Page 149: Initial Setting Contents

    Field Setting for SkyAir Indoor Unit SiENBE18-621 4.2.2 Infrared Remote Control Note: If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual (optional hand book) for each optional accessory. Procedure 1.

  • Page 150: Local Setting Mode Number

    SiENBE18-621 Field Setting for SkyAir Indoor Unit Local Setting Mode Number Example To set the filter sign time to “filter contamination - heavy” for all units in a group: Set mode No. to “10,” setting switch No. to “0,” and setting position No. to “02.” Table (FHQ &...

  • Page 151: Detailed Explanation Of Setting Modes

    Field Setting for SkyAir Indoor Unit SiENBE18-621 Detailed Explanation of Setting Modes 4.5.1 Air Flow Direction Setting (FFQ) Set the air flow direction of indoor units as given in the table below. (Set when optional air outlet blocking pad has been installed.) The second code No. is factory set to “01.” Setting Table Mode No.
  • Page 152 SiENBE18-621 Field Setting for SkyAir Indoor Unit 4.5.5 Fan Speed Changeover When Thermostat is OFF (FFQ & FHQ) By setting to “Set Fan Speed,” you can switch the fan speed to the set fan speed when the heating thermostat is OFF. ∗...
  • Page 153 Field Setting for SkyAir Indoor Unit SiENBE18-621 Address Setting <Setting from the remote control> (It is Factory Set 1. Hold down the “ ” button and the “ ” button for at least 4 seconds, to get the FIELD SET MODE. (Indicated in the display area in the figure at below). to “1”) 2.
  • Page 154 SiENBE18-621 Field Setting for SkyAir Indoor Unit After Setting Stick the Unit No. label at decoration panel air discharge outlet as well as on the back of the infrared remote control. Infrared remote control Unit No. label Decoration panel PRECAUTIONS Set the Unit No.

  • Page 155: Centralized Group No. Setting

    Field Setting for SkyAir Indoor Unit SiENBE18-621 Centralized Group No. Setting " If carrying out centralized control with a central remote control and unified ON/OFF controller, you have to set the group No. for each group by remote control. " To set the group No., first turn on the power supply of the central remote control, unified ON/ OFF controller and indoor unit.

  • Page 156: Maintenance Mode Setting

    SiENBE18-621 Field Setting for SkyAir Indoor Unit Maintenance Mode Setting Procedure 1. Enter the field set mode. Continue to push the inspection / test operation button for a minimum of 4 seconds. 2. Enter the maintenance mode. After having entered the field set mode, continue to push the inspection / test operation button for a minimum of 4 seconds.

  • Page 157: Test Operation And Field Setting For Ra Indoor Unit

    Test Operation and Field Setting for RA Indoor Unit SiENBE18-621 5. Test Operation and Field Setting for RA Indoor Unit Test Operation from the Remote Control For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature.

  • Page 158: Jumper Settings

    SiENBE18-621 Test Operation and Field Setting for RA Indoor Unit Jumper Settings 5.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two infrared remote controls can be set for different addresses. How to set the different addresses "...
  • Page 159 Test Operation and Field Setting for RA Indoor Unit SiENBE18-621 5.2.3 Adjusting the Angle of the Intelligent Eye Sensor FTXS20-35C " Once installation of the indoor unit is complete, adjust the angle of the Intelligent eye sensor to ensure the detection area properly covers the room. (Adjustable angle : 15°...

  • Page 160: Part 7 System Configuration

    SiENBE18-621 Part 7 System Configuration 1. System Configuration................150 1.1 Operation Instructions ................150 2. Instruction....................151 2.1 RMXS Series..................151 2.2 Wall Mounted, Duct, Floor/Ceiling, Floor Standing Type .....152 2.3 Ceiling Mounted Cassette Type ............227 2.4 Ceiling Suspended Type ..............238 System Configuration...

  • Page 161: System Configuration

    System Configuration SiENBE18-621 1. System Configuration Operation Instructions After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.

  • Page 162: Instruction

    SiENBE18-621 Instruction 2. Instruction RMXS Series Regarding use Super Multi Plus System air conditioner Points the customer should be aware of " Comfort At startup • After the power is initially turned on, it will take approx. 10 minutes until startup. Usually the unit will start in 3 minutes. Heating operation (Not for a unit for cooling only) •...

  • Page 163: Wall Mounted, Duct, Floor/Ceiling, Floor Standing Type

    Instruction SiENBE18-621 Wall Mounted, Duct, Floor/Ceiling, Floor Standing Type 2.2.1 Manual Contents and Reference Page Wall Mounted Type Model Series FTXS50/60/71E, FTXS20/25/35/50D FTXS20/25/35C FTXS71B Read before Operation Safety Precautions Names of Parts Preparation before Operation H Operation AUTO, DRY, COOL, HEAT, FAN Operation H Adjusting the Air Flow Direction POWERFUL Operation H...

  • Page 164: Safety Precautions

    Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric shocks, fire etc. For repairs and reinstallation, consult your Daikin dealer for advice and information. • The refrigerant used in the air conditioner is safe. Although leaks should not occur, if for some reason any refrigerant happens to leak into the room, make sure it does not come in contact with any flame as of gas heaters, kerosene heaters or gas range.

  • Page 165: Installation Site

    Instruction SiENBE18-621 • Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard. • Do not place anything under the indoor or outdoor unit that must be kept away from moisture.

  • Page 166: Names Of Parts

    SiENBE18-621 Instruction 2.2.3 Names of Parts FTXS 20/25/35/50 D " Indoor Unit ON/OFF System Configuration...
  • Page 167 Instruction SiENBE18-621 " Outdoor Unit " Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: 2. Titanium Apatite Photocatalytic Air-Purifying Filter: • Push this switch once to start operation. Push once • These filters are attached to the inside of the air filters. again to stop it.
  • Page 168 SiENBE18-621 Instruction " Remote control ECONO ON/OFF TEMP POWERFUL MODE SWING SILENT COMFORT SENSOR CANCEL TIMER < > ARC433A50, 43 1. Signal transmitter: 8. SILENT button: OUTDOOR UNIT SILENToperation • It sends signals to the indoor unit. 9. FAN setting button: 2.

  • Page 169: Indoor Unit

    Instruction SiENBE18-621 FTXS 20/25/35C " Indoor Unit System Configuration...

  • Page 170: Outdoor Unit

    SiENBE18-621 Instruction " Outdoor Unit " Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: 2. Air purifying filter with photocatalytic deodorizing • Push this switch once to start operation. Push once function: again to stop it. • These filters are attached to the inside of the air filters.t •...

  • Page 171: Remote Control

    Instruction SiENBE18-621 " Remote Control 1. Signal transmitter: • It selects the operation mode.(AUTO/DRY/COOL/ • •It sends signals to the indoor unit. HEAT/FAN) 2. Display: 8. SILENT button: • •It displays the current settings. (In this illustration, OUTDOOR UNIT SILENT operation each section is shown with all its displays ON for the 9.
  • Page 172 SiENBE18-621 Instruction FTK(X)S 50/60/71 B, FTXS 71 D " Indoor Unit " Main unit control panel System Configuration...
  • Page 173 Instruction SiENBE18-621 " Outdoor Unit " Indoor Unit 1. 1.Air filter 14. Indoor Unit ON/OFF switch: 2. Titanium Apatite Photocatalytic Air-Purifying • Push this switch once to start operation. Push once Filter: again to stop it. • These filters are attached to the inside of the air filters. •...
  • Page 174 SiENBE18-621 Instruction " Remote control < > ARC433A21, A22 1. Signal transmitter: 8. SILENT button: • It sends signals to the indoor unit. for OUTDOOR UNIT SILENT operation 2. Display: 9. FAN setting button: • It displays the current settings. (In this illustration, each •...
  • Page 175 Instruction SiENBE18-621 FDXS 25/35/50 C, FDXS 25/35 E " Indoor Unit System Configuration...
  • Page 176 SiENBE18-621 Instruction " Outdoor Unit " Indoor Unit 1. Air outlet 10. Indoor Unit ON/OFF switch: 2. Air outlet grille: (Field supply) • Push this switch once to start operation. • Appearance of the Air outlet grille and Air inlet grille Push once again to stop it.
  • Page 177 Instruction SiENBE18-621 " Remote Control HOME LEAVE ON/OFF TEMP POWERFUL MODE SILENT CANCEL TIMER < > ARC433A7, A8 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2. Display: (AUTO/DRY/COOL/HEAT/FAN) •...
  • Page 178 SiENBE18-621 Instruction FLXS 25/35/50/60 B " Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this manual show the case when installation is being carried out to the ceiling. (The methods of operation use are the same when installing to a wall.) "...
  • Page 179 Instruction SiENBE18-621 " Outdoor Unit " Indoor Unit 1. Louvers (vertical blades): 13. Indoor Unit ON/OFF switch: • The louvers are inside of the air outlet. • Push this switch once to start operation. Push once 2. Air outlet again to stop it. 3.
  • Page 180 SiENBE18-621 Instruction " Remote Control HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT CANCEL TIMER < > ARC433A5, A6 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2.
  • Page 181 Instruction SiENBE18-621 FVXS 25/35/50 B " Indoor Unit " Opening the front grille How to open the front panel Air outlet selection switch This setting blows air from upper outlet only. This setting automatically decides a blow pattern depending on mode and conditions. This setting is recommended.
  • Page 182 SiENBE18-621 Instruction " Outdoor Unit " Indoor Unit 1. Photocatalytic deodorizing filter and Air purifying • The operation mode refers to the following table. filter: Temperature Air flow • These filters are attached to the inside of the air filters. Mode setting rate...
  • Page 183 Instruction SiENBE18-621 " Remote Control HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT CANCEL TIMER < > ARC433A5, A6 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2.
  • Page 184 SiENBE18-621 Instruction 2.2.4 Preparation before Operation " To set the batteries 1. Slide the front cover to take it off. Position + and 2. Set two dry batteries (AAA). – correctly! 3. Set the front cover as before. ATTENTION " About batteries •...
  • Page 185 Instruction SiENBE18-621 " To operate the remote control • To use the remote control, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote control, such as a curtain, the unit will not operate. Receiver •...

  • Page 186: To Set The Clock

    SiENBE18-621 Instruction " To set the clock 1. Press “CLOCK button”. 0:00 is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. Holding down “ ” or “ ” button rapidly increases or decreases the time display. 3.
  • Page 187 Instruction SiENBE18-621 2.2.5 Auto • Dry • Cool • Heat • Fan Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. " To start operation 1.

  • Page 188: To Change The Air Flow Rate Setting

    SiENBE18-621 Instruction " To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...

  • Page 189: Adjusting The Air Flow Direction

    Instruction SiENBE18-621 2.2.6 Adjusting the Air Flow Direction FTXS 20/25/35/50 D You can adjust the air flow direction to increase your comfort. " To adjust the horizontal blades (flaps) 1. Press “SWING button”. is displayed on the LCD and the “...
  • Page 190 SiENBE18-621 Instruction " To start COMFORT AIRFLOW operation 3.Press “COMFORT AIRFLOW button”. • The flap position will change, preventing air from blowing directly on the occupants of the room. • is displayed on the LCD. “ ” <COOL/DRY> The flap will go up. <HEAT>...
  • Page 191 Instruction SiENBE18-621 FTXS 20/25/35 C You can adjust the air flow direction to increase your comfort. " To adjust the horizontal blades (flaps) 1. Press “SWING button ”. • “ ” is displayed on the LCD and the flaps will begin to swing. 2.
  • Page 192 SiENBE18-621 Instruction " To adjust the vertical blades (louvers) Hold the knob and move the louvers. (You will find a knob on the left-side and the right-side blades.) Notes on flaps and louvers angels. • When “SWING button” is selected, the flaps swinging range depends In DRY mode or COOL mode on the operation mode.
  • Page 193 Instruction SiENBE18-621 FTXS 50/60/71 E, FTXS 71 B You can adjust the air flow direction to increase your comfort. " To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD and the flaps begin to swing.
  • Page 194 SiENBE18-621 Instruction " To 3-D Airflow 1. 3. Press the “SWING button ” and the “SWING button ”: the “ ” and “ ” display will light up and the flap and louvers will move in turn. " To cancel 3-D Airflow 2.
  • Page 195 Instruction SiENBE18-621 FLXS 25/35/50/60 B You can adjust the air flow direction to increase your comfort. " To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD and the flaps begin to swing. 2.
  • Page 196 SiENBE18-621 Instruction " To adjust the vertical blades (louvers) • When adjusting the louver, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvers. (You will find a knob on the left side and the right side blades.) Notes on flaps and louvers angels.
  • Page 197 Instruction SiENBE18-621 FVXS 25/35/50 B You can adjust the air flow direction to increase your comfort. " To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD and the flaps will begin to swing. 2.

  • Page 198: Air Flow Selection

    SiENBE18-621 Instruction " Air flow selection • Make air flow selection according to what suits you. When setting the air flow selection switch to • Air conditioner automatically decides the appropriate blowing pattern depending on the operating mode/situation. Operating mode Situation Blowing pattern •...

  • Page 199: Powerful Operation

    Instruction SiENBE18-621 2.2.7 POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity. " To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.

  • Page 200: Outdoor Unit Silent Operation

    SiENBE18-621 Instruction 2.2.8 OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. " To start OUTDOOR UNIT SILENT operation 1.

  • Page 201: Econo Operation

    Instruction SiENBE18-621 2.2.9 ECONO Operation ECONO operation is a function which enables efficient operation by lowering the maximum power consumption value. " To start ECONO operation 1. Press “ECONO button”. • “ ” is displayed on the LCD. " To cancel ECONO operation 2.
  • Page 202 SiENBE18-621 Instruction 2.2.10 HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. " To start HOME LEAVE operation 1. Press “HOME LEAVE button”. • “ ” is displayed on the LCD. •...
  • Page 203 Instruction SiENBE18-621 " What’s the HOME LEAVE operation? Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate. You can start your favorite operation mode simply by pressing the HOME LEAVE button on the remote control.

  • Page 204: Intelligent Eye Operation

    SiENBE18-621 Instruction 2.2.11 INTELLIGENT EYE Operation FTXS 20/25/35/50 D “INTELLIGENT EYE” is the infrared sensor which detects the human movement. " To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. " To cancel the INTELLIGENT EYE operation 2.
  • Page 205 Instruction SiENBE18-621 “INTELLIGENT EYE” is useful for Energy Saving " Energy saving operation • Change the temperature –2°C in heating / +2°C in cooling / +2°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...
  • Page 206 SiENBE18-621 Instruction FTXS 20/25/35 C “INTELLIGENT EYE” is the infrared sensor which detects the human movement. " To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. " To cancel the INTELLIGENT EYE operation 2.
  • Page 207 Instruction SiENBE18-621 " To adjust the angle of the INTELLIGENT EYE sensor • You can adjust the angle of the INTELLIGENT EYE sensor to increase the detection area.(Adjustable angle: 15° to right and left of centre) INTELLIGENT EYE sensor • Gently push and slide the sensor to adjust the angle.
  • Page 208 SiENBE18-621 Instruction FTXS 50/60/71 E, FTXS 71 B “INTELLIGENT EYE” is the infrared sensor which detects the human movement. " To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. " To cancel the INTELLIGENT EYE operation 2.
  • Page 209 Instruction SiENBE18-621 “INTELLIGENT EYE” is useful for Energy Saving " Energy saving operation • Change the temperature –2°C in heating / +2°C in cooling / +2°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...

  • Page 210: Timer Operation

    SiENBE18-621 Instruction 2.2.12 TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. " To use OFF TIMER operation •...

  • Page 211: To Use On Timer Operation

    Instruction SiENBE18-621 " To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. • 6:00 is displayed. • “ “blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 212: Note For Multi System

    SiENBE18-621 Instruction 2.2.13 Note for Multi System <<What is a “Multi System”? >> This system has one outdoor unit connected to multiple indoor units. " Selecting the Operation Mode 1. With the Priority Room Setting present but room Outdoor inactive or not present unit When more than one indoor unit is operating, room...

  • Page 213: Priority Room Setting

    Instruction SiENBE18-621 " Priority Room Setting The Priority Room Setting requires initial programming during installation. Please consult your retailer or dealer for assistance. The room designated as the Priority Room takes priority in the following situations: 1. Operation Mode Priority As the operation mode of the Priority Room takes precedence, the user can select a different operation mode from other rooms.

  • Page 214: Care And Cleaning

    SiENBE18-621 Instruction 2.2.14 Care and cleaning FTXS 20/25/35/50 D CAUTION Before cleaning, be sure to stop the operation and turn the breaker OFF. UNITS " Indoor unit, Outdoor unit and Remote control 1. Wipe them with dry soft cloth. " Front panel 1.

  • Page 215: Air Filter

    Instruction SiENBE18-621 FILTERS 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the Titanium Apatite Photocatalytic Air-Purifying Filter. •...

  • Page 216: Before A Long Idle Period

    SiENBE18-621 Instruction NOTE • Operation with dirty filters: (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor heating or cooling. (4) may cause odour. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact to the service shop where you bought the air conditioner.

  • Page 217: Front Panel

    Instruction SiENBE18-621 FTK(X)S 20/25/35 C CAUTION Before cleaning, be sure to stop the operation and turn the breaker OFF. UNITS " Indoor unit, outdoor unit and remote control 1. Wipe them with dry soft cloth. " Front panel 1. Open the front panel. •...
  • Page 218 SiENBE18-621 Instruction Filters 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air purifying filter with photocatalytic deodorizing function •...
  • Page 219 Instruction SiENBE18-621 Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...
  • Page 220 SiENBE18-621 Instruction FTXS 50/60/71 E, FTXS 71 B CAUTION Before cleaning, be sure to stop the operation and turn the breaker OFF. UNITS " Indoor unit, Outdoor unit and Remote control 1. Wipe them with dry soft cloth. " Front panel 1.
  • Page 221 Instruction SiENBE18-621 FILTERS 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the Titanium Apatite tabs (3 tabs at top) Photocatalytic Air-Purifying Filter.
  • Page 222 SiENBE18-621 Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...

  • Page 223: Cleaning The Air Filter

    Instruction SiENBE18-621 FDXS 25/35 C CAUTION • Only a qualified service person is allowed to perform maintenance. • Before cleaning, be sure to stop the operation and turn the breaker OFF. " Cleaning the air filter 1. Removing the air filter. •...
  • Page 224 • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage.Ask your DAIKIN dealer to clean them. • Prepare a cover locally to prevent any dust in the air around the indoor unit from getting in the drain pan, if there is a great deal of dust present.
  • Page 225 Instruction SiENBE18-621 FDXS 50/60 C, FDXS 25/35 E CAUTION • Only a qualified service person is allowed to perform maintenance. • Before cleaning, be sure to stop the operation and turn the breaker OFF. " Cleaning the air filter 1. Removing the air filter. •...
  • Page 226 • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage. Ask your DAIKIN dealer to clean them. • Prepare a cover locally to prevent any dust in the air around the indoor unit from getting in the drain pan, if there is a great deal of dust present.
  • Page 227 Instruction SiENBE18-621 FLXS 25/35/50/60 B CAUTION Before cleaning, ve sure to stop the operation and turn the breaker OFF. UNITS " Indoor unit, Outdoor unit and Remote control 1. Wipe them with dry soft cloth. " Front panel 1. Open the front grille. •...
  • Page 228 SiENBE18-621 Instruction FILTERS 1. Open the front grille. 2. Pull out the air filter. • Push upwards the tab at the center of each air filter, then pull it down. 3. Take off the air purifying filter, Photocatalytic deodorizing filter. •...
  • Page 229 Instruction SiENBE18-621 Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...

  • Page 230: Front Grille

    SiENBE18-621 Instruction FVXS 25/35/50 B CAUTION Before cleaning, be sure to stop the operation and turn the breaker OFF. UNITS " Indoor unit, Outdoor unit and Remote control 1. Wipe them with dry soft cloth. " Front grille 1. Open the front panel. •...
  • Page 231 Instruction SiENBE18-621 FILTERS 1. Open the front grille. 2. Remove the air filter. • Press the claws on the right and left of the air filter down slightly, then pull upward. 3. Take off the air purifying filter, Photocatalytic deodorizing filter. •...
  • Page 232 SiENBE18-621 Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...

  • Page 233: Troubleshooting

    Instruction SiENBE18-621 2.2.15 Troubleshooting These cases are not troubles The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation Operation does not start soon. • This is to protect the air conditioner. •...
  • Page 234 SiENBE18-621 Instruction Check again Please check again before calling a repair person. Case Check The air conditioner does not operate. • Hasn’t a breaker turned OFF or a fuse blown? (OPERATION lamp is off) • Isn’t it a power failure? •...
  • Page 235 Instruction SiENBE18-621 Call the service shop immediately WARNING " When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner.
  • Page 236 SiENBE18-621 Instruction Fault diagnosis Fault diagnosis by remote control In the ARC433A series, the temperature display sections on the main unit indicate corresponding codes. 1. When the TIMER CANCEL button is held down for 5 seconds, a “00” indication flashes on the temperature display section.
  • Page 237 Instruction SiENBE18-621 LED ON OUTDOOR UNIT PCB 3MXS, 3MKS, 4MXS, 4MKS series GREEN MICROCOMPUTER MALFUNCTION NORMAL DETECTION LED_A LED1 LED2 LED3 LED4 DIAGNOSIS NORMAL,CHECK INDOOR UNIT HIGH PRESSURE PROTECTOR WORKED OR FREEZE-UP IN OPERATING UNIT OR STAND-BY UNIT * OVERLOAD RELAY WORKED OR HIGH DISCHARGE PIPE TEMPERATURE FAULTY COMPRESSOR START INPUT OVERCURRENT * THERMISTOR OR CT ABNORMALITY...

  • Page 238: Ceiling Mounted Cassette Type

    SiENBE18-621 Instruction Ceiling Mounted Cassette Type TEST AVAILABLE TEST System Configuration...
  • Page 239 This operation manual is for the following systems with • Cooling only type standard control. Before initiating operation, contact your This system provides cooling, program dry, and fan Daikin dealer for the operation that corresponds to your operation modes. system. • Pair system...
  • Page 240 SiEN18-621 Instruction For installation of separately sold component parts, 2. Safety considerations ask a specialist. Be sure to use the separately sold component parts We recommend that you read this instruction manual carefully designated by our company. before use to gain full advantage of the function of the air Incomplete installation performed by yourself may result in conditioner, and to avoid malfunction due to erroneous a failure, a water leakage, electric shock, and fire.
  • Page 241 Instruction SiEN18-621 Do not install the air conditioner at any place where 4. Installation site flammable gas may leak out. If the gas leaks out and stays around the air conditioner, a Regarding places for installation fire may break out. •...
  • Page 242 Refer to figure 1 on page [1] • Operating procedure varies with heat pump type and This display shows the PROGRAMMED TIME cooling only type. Contact your Daikin dealer to confirm of the system start or stop. your system type. DISPLAY “...

  • Page 243: Temperature Setting

    • The movable limit of the flap is changeable. are cold, we recommend that you use a circulator (a fan to Contact your Daikin dealer for details. circulate the air inside the room). For details, consult your dealer. System Configuration...
  • Page 244 SiEN18-621 Instruction When this button is pressed, the time advances by Press the AIR FLOW DIRECTION ADJUST button 1 hour. to select the air direction as following. The AIR FLOW FLAP display swings as When this button is pressed, the time goes shown left and the air flow direction backward by 1 hour.
  • Page 245 Instruction SiEN18-621 A) Using a vacuum cleaner 8. Maintenance (For service personnel) Only a qualified service person is allowed to perform maintenance B) Washing with water When the air filter is very IMPORTANT! dirty, use soft brush and • Before obtaining access to terminal devices, all power neutral detergent.
  • Page 246 SiEN18-621 Instruction What to do when stopping the system for a long Fig. 4 period Turn on FAN OPERATION for half a day and dry the unit. • Refer to “6. Operation procedure”. Cut off the power supply. • When the main power switch is turned on, some watts of electricity is being used even if the system is not operating.
  • Page 247 It is necessary to clean the inside of the indoor Continued operation under such circumstances may result unit. Ask your Daikin dealer for details on cleaning the unit. in a failure, electric shock, and fire. This operation requires a qualified service person.
  • Page 248 MALFUNCTION CODE Measure: Notify and inform the model name and what the malfunction code indicates to your Daikin dealer. II. If the system does not properly operate except for the above mentioned case, and none of the above mentioned malfunctions is evident, investigate the system according to the following procedures.

  • Page 249: Ceiling Suspended Type

    Instruction SiENBE18-621 Ceiling Suspended Type 5 12 TEST AVAILABLE TEST System Configuration...
  • Page 250 This operation manual is for the following systems with This system provides cooling, program dry, and fan standard control. Before initiating operation, contact your operation modes. Daikin dealer for the operation that corresponds to your system. Precautions for group control system or two •...
  • Page 251 Instruction SiEN18-621 Incomplete installation may result in a failure, a water • The pecautions described below are WARNING and leakage, electric shock, and fire. CAUTION. These are very important precautions Do not use any fuse with improper capacity. concerning safety. Be sure to observe all of them The use of a piece of wire and whatnot may result in a without fail.

  • Page 252: Operation Range

    SiEN18-621 Instruction Adverse influence to little children, plants or animals may HEATING result. INDOOR OUTDOOR Do not wash the air conditioner with water. OUTDOOR UNIT TEMPERATURE TEMPERATURE An electric shock or fire may result. – 9 to 21 Do not install the air conditioner at any place where RY35 ·...
  • Page 253 Instruction SiEN18-621 Pay attention to running noises, too • Are the following places selected? DISPLAY “ ” (PROGRAMMED TIME) a. A place that can sufficiently withstand the weight of the air conditioner with less running noises and vibrations. This display shows the PROGRAMMED TIME b.

  • Page 254: Air Flow Direction Adjust

    In such a case, use the air conditioner in combination with • Operating procedure varies with heat pump type and other heating systems. cooling only type. Contact your Daikin dealer to confirm • A warm air circulation system is employed, and therefore it your system type.
  • Page 255 • The movable limit of the flap is changeable. Con-tact your Press the TIMER MODE START/STOP button several Daikin dealer for details. Press the AIR FLOW DIRECTION ADJUST button times and select the mode on the display. The display flashes.
  • Page 256 SiEN18-621 Instruction 7. Optimum operation Fig. 3 Observe the following precautions to ensure the system operates. • Adjust the room temperature properly for a comfortable environment. Avoid excessive heating or cooling. • Prevent direct sunlight from entering a room during cooling operation by using curtains or blinds.
  • Page 257 Instruction SiEN18-621 Confirm the following NOTE • Check that the air inlet and outlet are not blocked. • Do not wash the air conditioner with hot water of more than Remove any obstacle. 50°C, as doing so may result in discoloration and/or •...
  • Page 258 It is necessary to clean the inside of the indoor This is because the room temperature has reached the set unit. Ask your Daikin dealer for details on cleaning the unit. temperature. The indoor unit switches to fan operation.
  • Page 259 MALFUNCTION CODE Measure: Notify and inform the model name and what the malfunction code indicates to your Daikin dealer. II. If the system does not properly operate except for the above mentioned case, and none of the above mentioned malfunctions is evident, investigate the system according to the following procedures.

  • Page 260: Part 8 Troubleshooting

    SiENBE18-621 Part 8 Troubleshooting 1. Caution for Diagnosis................251 1.1 Troubleshooting with the Operation Lamp (RA Indoor Unit) ....251 1.2 Troubleshooting with the LED on the SkyAir Indoor Unit .....252 1.3 Troubleshooting with the LED on the Outdoor Unit......253 1.4 Troubleshooting with the LED on the BP Unit ........254 2.
  • Page 261 SiENBE18-621 7. Troubleshooting for Outdoor Unit............307 7.1 Faulty Outdoor Unit PCB..............307 7.2 Actuation of High Pressure Switch ............308 7.3 Actuation of Low Pressure Sensor ............310 7.4 Compressor Motor Lock ...............312 7.5 Malfunction of Outdoor Unit Fan Motor ..........313 7.6 Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E) ...................314 7.7 Abnormal Discharge Pipe Temperature ..........316 7.8 Refrigerant Overcharged..............317...

  • Page 262: Caution For Diagnosis

    SiENBE18-621 Caution for Diagnosis 1. Caution for Diagnosis Troubleshooting with the Operation Lamp (RA Indoor Unit) The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation.

  • Page 263: Troubleshooting With The Led On The Skyair Indoor Unit

    Caution for Diagnosis SiENBE18-621 Caution: Operation stops suddenly. (Operation lamp blinks.) Cause of above trouble could be "Operation mode butting". Check followings; Are the operation modes all the same for indoor units connected to Multi system outdoor unit? If not set all indoor units to the same operation mode and confirm that the operation lamp is not blinking.

  • Page 264: Troubleshooting With The Led On The Outdoor Unit

    SiENBE18-621 Caution for Diagnosis Troubleshooting with the LED on the Outdoor Unit There are green and orange LEDs on the PCB. The blinking green LED indicates normal equipment condition, and the OFF condition of the orange LED indicates normal equipment condition.

  • Page 265: Troubleshooting With The Led On The Bp Unit

    Caution for Diagnosis SiENBE18-621 Troubleshooting with the LED on the BP Unit LEDA(H1P) LED1(H2P) LED2(H3P) LED3(H4P) LED4(H5P) (Q0395) GREEN LED-B (GREEN) NORMALLY FLASHING INTERCOMMNICATION TO NORMALLY OFF DIAGNOSIS OUTDOOR UNIT : NORMAL NORMAL FLASH ABNORMALITY ? CHECK INTER-UNIT WIRING ABNORMALITY ? CHECK INTER-UNIT WIRING IRRELEVANT GREEN MICROCOMPUTER:...

  • Page 266: Service Check Function

    SiENBE18-621 Service Check Function 2. Service Check Function RA Indoor Unit Infrared Remote Control In the ARC433A series remote control, the temperature display sections on the main unit indicate corresponding codes. Check Method 1 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section.
  • Page 267 Service Check Function SiENBE18-621 Check Method 2 1. Enter the diagnosis mode. s ,TEMP t , MODE) simultaneously. Press the 3 buttons (TEMP (R4272) The digit of the number of tens blinks. HTry again from the start when the digit does not blink. (R4273) 2.
  • Page 268 SiENBE18-621 Service Check Function 5. Press the TEMP button. s or TEMP t and change the digit until you hear the sound of “beep”. Press TEMP (R4277) 6. Diagnose by the sound. H“pi” : The both numbers of tens and units do not accord with the error code. H“pi pi”...
  • Page 269 Service Check Function SiENBE18-621 Error Code List in - : Not used for troubleshooting Relation to RA Indication on Description of the Fault Details of fault the remote (Refer to the Indoor Units control indicated page.) Indoor unit in normal condition (Conduct a diagnosis of the outdoor —...

  • Page 270: Skyair Indoor Unit Inspection/Test Button

    SiENBE18-621 Service Check Function SkyAir Indoor Unit INSPECTION/TEST Button Explanation The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Depress Inspection/Test Operation button for more than 4 seconds.

  • Page 271: Skyair Indoor Unit Wired Remote Control

    Service Check Function SiENBE18-621 SkyAir Indoor Unit Wired Remote Control Explanation If operation stops due to malfunction, the remote control’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when the inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.

  • Page 272: Skyair Indoor Unit Infrared Remote Control

    SiENBE18-621 Service Check Function SkyAir Indoor Unit Infrared Remote Control If equipment stops due to a malfunction, the operation indicating LED on the light reception section flashes. The malfunction code can be determined by following the procedure described below. (The malfunction code is displayed when an operation error has occurred.

  • Page 273: Service Check Function

    Service Check Function SiENBE18-621 Normal status Enters inspection mode from normal status when the INSPECITON/TEST button is pressed. 1 Press INSPECTION/TEST button. If no button is pressed for 1 minute, equipment returns to normal status. Press MODE selector button When MODE selector button is pressed or no button is pressed for 1 minute,...

  • Page 274: Sky Air Indoor Unit Error Codes And Led Indication

    SiENBE18-621 Service Check Function Sky Air Indoor Unit Error Codes and LED Indication Symbols : Blinks : On : Off — : No connection with troubleshooting - : High probability of malfunction # : Possibility of malfunction . : Low probability of malfunction —...

  • Page 275: Malfunction Code Indication By Outdoor Unit Pcb

    Service Check Function SiENBE18-621 Malfunction Code Indication by Outdoor Unit PCB <Monitor mode> Contents of malfunction Malfunction code To enter the monitor mode, push the MODE (BS1) button when in In-phase malfunction of DIII-NET Detection of DIII-NET “Setting mode 1”. Abnormal discharge pressure HPS activated Abnormal suction pressure...
  • Page 276 SiENBE18-621 Service Check Function 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗1 ∗1 ∗1...
  • Page 277 Service Check Function SiENBE18-621 <Monitor mode> Contents of malfunction Malfunction code To enter the monitor mode, push the Open phase/Power supply imbalance Imbalance of inverter power supply MODE (BS1) button when in voltage “Setting mode 1”. Faulty temperature sensor of inverter Faulty thermistor of inverter fin radiation fin Gas shortage...
  • Page 278 SiENBE18-621 Service Check Function 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗1 ∗1 Display of contents of...

  • Page 279: List Of Malfunction Code

    List of Malfunction Code SiENBE18-621 3. List of Malfunction Code 9: Blink 8: ON 7: OFF Malfunction Malfunction contents Page Referred code RA Indoor SkyAir BP Unit Outdoor Unit Indoor Unit Unit Indoor Error of external protection device — — —...
  • Page 280 SiENBE18-621 List of Malfunction Code 9: Blink 8: ON 7: OFF Malfunction Malfunction contents Page Referred code RA Indoor SkyAir BP Unit Outdoor Unit Indoor Unit Unit Outdoor Malfunction of PC board — — — Unit Malfunction of inverter radiating fin temperature rise —...

  • Page 281: Troubleshooting For Ra Indoor Unit

    Troubleshooting for RA Indoor Unit SiENBE18-621 4. Troubleshooting for RA Indoor Unit Indoor Unit PCB Abnormality Remote Control Display Method of Evaluation of zero-cross detection of power supply by indoor unit. Malfunction Detection Malfunction When there is no zero-cross detection in approximately 10 continuous seconds. Decision Conditions "...

  • Page 282: Freeze-Up Protection Control Or High Pressure Control

    SiENBE18-621 Troubleshooting for RA Indoor Unit Freeze-up Protection Control or High Pressure Control Remote Control Display " High pressure control (heat pump model only) Method of Malfunction During heating operations, the temperature detected by the indoor heat exchanger thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection "...
  • Page 283 Troubleshooting for RA Indoor Unit SiENBE18-621 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Check the air passage. Refer to P.279 Is there any short-circuit? Provide sufficient air passage. Check the intake air filter.

  • Page 284: Fan Motor Or Related Abnormality

    SiENBE18-621 Troubleshooting for RA Indoor Unit Fan Motor or Related Abnormality 4.3.1 AC Motor (Wall 20~35 C series, Duct, Floor / Ceiling) Remote Control Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation.
  • Page 285 Troubleshooting for RA Indoor Unit SiENBE18-621 4.3.2 DC Motor (Wall 20~35 D series and 50~71 class, Floor) Remote Control Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed is less than 50% of the H tap under maximum fan motor...
  • Page 286 SiENBE18-621 Troubleshooting for RA Indoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off power supply and Refer to P.278 rotate fan by hand. Check No.02 Does fan rotate Replace fan motor.

  • Page 287: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting for RA Indoor Unit SiENBE18-621 Thermistor or Related Abnormality (Indoor Unit) C4, C9 Remote Control Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor Decision operation∗.

  • Page 288: Shutter Drive Motor / Shutter Limit Switch Abnormality

    SiENBE18-621 Troubleshooting for RA Indoor Unit Shutter Drive Motor / Shutter Limit Switch Abnormality Remote Control Display Method of The shutter open / close performance is detected by the limit switch attached on its structure. In this way, the shutter drive motor and the shutter limit switch are checked for failure. Malfunction Detection Malfunction...

  • Page 289: Check

    Troubleshooting for RA Indoor Unit SiENBE18-621 Check 4.6.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7 and 4-8). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.

  • Page 290: Thermistor Resistance Check

    SiENBE18-621 Troubleshooting for RA Indoor Unit 4.6.3 Thermistor Resistance Check Check No.06 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.

  • Page 291: Hall Ic Check

    Troubleshooting for RA Indoor Unit SiENBE18-621 4.6.4 Hall IC Check Check No.16 1. Check the connector connection. 2. With the power ON, operation OFF, and the connector connected, check the following. ∗Output voltage of about 5 V between pins 1 and 3. ∗Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.

  • Page 292: Troubleshooting For Skyair Indoor Unit

    SiENBE18-621 Troubleshooting for SkyAir Indoor Unit 5. Troubleshooting for SkyAir Indoor Unit Indoor Unit PCB Abnormality Remote Control Display Applicable FFQ-B & FHQ-BU Models Method of Check data from E PROM. Malfunction Detection Malfunction When data could not be correctly received from the E PROM Decision PROM : Type of nonvolatile memory.

  • Page 293: Malfunction Of Drain Water Level System (Float Type)

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 Malfunction of Drain Water Level System (Float Type) Remote Control Display Applicable FFQ-B & FHQ-BU Models Method of By float switch OFF detection Malfunction Detection Malfunction When rise of water level is not a condition and the float switch goes OFF. Decision Conditions "...
  • Page 294 SiENBE18-621 Troubleshooting for SkyAir Indoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. If “A3” is detected by a PC board which is not mounted with X15A, the PC board is defective.

  • Page 295: Malfunction Of Drain System

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 Malfunction of Drain System Remote Control Display Applicable FHQ-BU Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in Malfunction non-operation. Detection Malfunction When the float switch changes from ON to OFF while the compressor is in non-operation. Decision Conditions "...

  • Page 296: Indoor Unit Fan Motor Lock

    SiENBE18-621 Troubleshooting for SkyAir Indoor Unit Indoor Unit Fan Motor Lock Remote Control Display Applicable FHQ-BU Models Method of Detection by failure of signal for detecting number of turns to come from the fan motor Malfunction Detection Malfunction When number of turns can’t be detected even when output voltage to the fan is maximum Decision Conditions "...

  • Page 297: Malfunction Of Indoor Unit Fan Motor

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 Malfunction of Indoor Unit Fan Motor Remote Control Display Applicable FFQ-B Models Method of Detection of abnormal fan speed by signal from the fan motor Malfunction Detection Malfunction When fan speed does not increase Decision Conditions "...
  • Page 298 SiENBE18-621 Troubleshooting for SkyAir Indoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off the power supply. Refer to P.298 Is there Remove the foreign matter. any foreign matter around the fan? Is the...

  • Page 299: Swing Flap Motor Malfunction / Lock

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 Swing Flap Motor Malfunction / Lock Remote Control Display Applicable FHQ-BU Models Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction Detection Malfunction When ON/OFF of the microswitch for positioning cannot be reversed even though the swing flap Decision motor is energized for a specified amount of time (about 30 seconds).
  • Page 300 SiENBE18-621 Troubleshooting for SkyAir Indoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Are the connectors correctly connected Connect correctly. to X29A and X14A on the PC board? Is the limit switch's...

  • Page 301: Malfunction Of Capacity Setting

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 Malfunction of Capacity Setting Remote Control Display Applicable FFQ-B, FHQ-BU Models Method of Capacity is determined according to resistance of the capacity setting adapter and the memory Malfunction inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is determined.

  • Page 302: Malfunction Of Heat Exchanger Thermistor (R2T)

    SiENBE18-621 Troubleshooting for SkyAir Indoor Unit Malfunction of Heat Exchanger Thermistor (R2T) Remote Control Display Applicable FFQ-B, FHQ-BU Models Method of Malfunction detection is carried out by temperature detected by heat exchanger sensor. Malfunction Detection Malfunction When the heat exchanger thermistor becomes disconnected or shorted while the unit is running. Decision Conditions "...

  • Page 303: Malfunction Of Heat Exchanger Thermistor (R3T)

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 Malfunction of Heat Exchanger Thermistor (R3T) Remote Control Display Applicable FFQ-B, FHQ-BU Models Method of Malfunction detection is carried out by temperature detected by heat exchanger sensor (R3T). Malfunction Detection Malfunction When the heat exchanger thermistor becomes disconnected or shorted while the unit is running. Decision Conditions "...

  • Page 304: Malfunction Of Suction Air Thermistor

    SiENBE18-621 Troubleshooting for SkyAir Indoor Unit 5.10 Malfunction of Suction Air Thermistor Remote Control Display Applicable FFQ-B, FHQ-BU Models Method of Malfunction detection is carried out by temperature detected by suction air temperature sensor. Malfunction Detection Malfunction When the suction air temperature sensor’s thermistor becomes disconnected or shorted while Decision the unit is running.

  • Page 305: Malfunction Of Remote Control Thermistor

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 5.11 Malfunction of Remote Control Thermistor Remote Control Display Applicable FFQ-B, FHQ-BU Models Method of Even if remote control thermistor is faulty, system is possible to operate by system thermistor. Malfunction Malfunction detection is carried out by temperature detected by remote control thermistor. Detection Malfunction When the remote control thermistor becomes disconnected or shorted while the unit is running.

  • Page 306: Transmission Error (Between Indoor Unit And Remote Control)

    SiENBE18-621 Troubleshooting for SkyAir Indoor Unit 5.12 Transmission Error (between Indoor Unit and Remote Control) Remote Control Display Applicable FFQ-B, FHQ-BU Models Method of Microcomputer checks if transmission between indoor unit and remote control is normal. Malfunction Detection Malfunction When transmission is not carried out normally for a certain amount of time Decision Conditions "...

  • Page 307: Transmission Error (Between Main And Sub Remote Control)

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 5.13 Transmission Error (between Main and Sub Remote Control) Remote Control Display Applicable FFQ-B, FHQ-BU Models Method of In case of controlling with 2- remote control, check the system using microcomputer if signal transmission between indoor unit and remote control (main and sub) is normal. Malfunction Detection Malfunction...

  • Page 308: Malfunction Of Field Setting Switch

    SiENBE18-621 Troubleshooting for SkyAir Indoor Unit 5.14 Malfunction of Field Setting Switch Remote Control Display Applicable FFQ-B, FHQ-BU Models Method of Malfunction Detection Malfunction Incorrect field setting Decision Conditions " Indoor-Outdoor (BP) transmission line Supposed " Faulty remote control wiring Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...

  • Page 309: Check

    Troubleshooting for SkyAir Indoor Unit SiENBE18-621 5.15 Check Check No. 01 Check for Fan Motor Connector (Power Supply Line) (1) Turn the power supply off. With the relay connector disconnected, measure the resistance between UVW phases of the connector (3 cores) at the motor side, then make sure that the resistance between each phase is balanced and not short-circuited.
  • Page 310 SiENBE18-621 Troubleshooting for SkyAir Indoor Unit Check No. 02 Check for Thermistors Disconnect the thermistor connector from PCB, then measure the resistance by using a tester. Unit : kΩ Thermistor temperature and resistance characteristics Temperature °C -6.0 90.8 88.0 -4.0 81.7 79.1 -2.0...

  • Page 311: Troubleshooting For Bp Unit

    Troubleshooting for BP Unit SiENBE18-621 6. Troubleshooting for BP Unit Malfunction of Electronic Expansion Valve Remote Control Display Method of Detection by checking continuity and lack of connector. Malfunction Detection Malfunction Malfunction is determined by no common voltage applied when turning the power supply on. Decision Conditions "...

  • Page 312: Faulty Bp Unit Pcb

    SiENBE18-621 Troubleshooting for BP Unit Faulty BP Unit PCB Remote Control Display Method of Check data from E PROM Malfunction Detection Malfunction When data could not be correctly received from the E PROM Decision PROM : Type of nonvolatile memory. Maintains memory contents even when the power supply is turned off.

  • Page 313: Faulty Bp Liquid Or Gas Pipe Thermistor

    Troubleshooting for BP Unit SiENBE18-621 Faulty BP Liquid or Gas Pipe Thermistor Remote Control Display Method of Malfunction Detection Malfunction When the BP liquid or gas pipe temperature sensor became short-circuited or open. Decision Conditions " Faulty BP liquid or gas pipe temperature sensor Supposed "...

  • Page 314: Transmission Error Between Indoor Unit And Bp Unit

    SiENBE18-621 Troubleshooting for BP Unit Transmission Error between Indoor Unit and BP Unit Outdoor Unit Indication Method of The data received from the BP unit in indoor unit-BP unit signal transmission is checked Malfunction whether it is normal. Detection Malfunction When the data sent from the BP unit cannot be received normally, or when the content of the Decision data is abnormal.
  • Page 315 Troubleshooting for BP Unit SiENBE18-621 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.14 Push and hold the RESET button on the outdoor unit PCB for 5 seconds Refer to P.306 Does the malfunction Normal...

  • Page 316: Transmission Error Between Outdoor Unit And Bp Unit

    SiENBE18-621 Troubleshooting for BP Unit Transmission Error between Outdoor Unit and BP Unit Outdoor Unit Indication Method of Transmission error is detected when the outdoor unit could not received the data from BP unit Malfunction correctly. Detection Malfunction When the data from BP unit could not be correctly received continuously for 10 minutes Decision Conditions "...

  • Page 317: Check

    Troubleshooting for BP Unit SiENBE18-621 Check 6.6.1 Power Supply Waveforms Check Check No.14 Measure the power supply waveform between pins 1 and 3 on the terminal board, and check the waveform disturbance. " Check to see if the power supply waveform is a sine wave (Fig.1). "...

  • Page 318: Troubleshooting For Outdoor Unit

    SiENBE18-621 Troubleshooting for Outdoor Unit 7. Troubleshooting for Outdoor Unit Faulty Outdoor Unit PCB Remote Control Display Applicable AII outdoor unit models Models Method of Check data from E PROM Malfunction Detection Malfunction When data could not be correctly received from the E PROM Decision PROM : Type of nonvolatile memory.

  • Page 319: Actuation Of High Pressure Switch

    Troubleshooting for Outdoor Unit SiENBE18-621 Actuation of High Pressure Switch Remote Control Display Applicable AII outdoor unit models Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction Error is generated when the HPS activation count reaches the number specific to the operation Decision mode.
  • Page 320 SiENBE18-621 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Refer to P.352 Check for the points shown below. 1 Is the stop valve open? 2 Is the HPS connector properly connected to the main PCB? 3 Does the high pressure switch have continuity?

  • Page 321: Actuation Of Low Pressure Sensor

    Troubleshooting for Outdoor Unit SiENBE18-621 Actuation of Low Pressure Sensor Remote Control Display Applicable AII outdoor unit models Models Method of Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Detection Malfunction Error is generated when the low pressure is dropped under specific pressure. Decision Operating pressure:0.07MPa Conditions...
  • Page 322 SiENBE18-621 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.02 Refer to P.353 Is the stop Open the stop valve. valve open? 1 Mount a pressure gauge on the low-pressure service port. 2 Connect the Service Checker.

  • Page 323: Compressor Motor Lock

    Troubleshooting for Outdoor Unit SiENBE18-621 Compressor Motor Lock Remote Control Display Applicable AII outdoor unit models Models Method of Inverter PCB takes the position signal from UVW line connected between the inverter and Malfunction compressor, and the malfunction is detected when any abnormality is observed in the phase- current waveform.

  • Page 324: Malfunction Of Outdoor Unit Fan Motor

    SiENBE18-621 Troubleshooting for Outdoor Unit Malfunction of Outdoor Unit Fan Motor Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction of fan motor system is detected according to the fan speed detected by Hall IC when the fan motor runs. Malfunction Detection "...

  • Page 325: Malfunction Of Moving Part Of Electronic Expansion Valve (Y1E, Y3E)

    Troubleshooting for Outdoor Unit SiENBE18-621 Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E) Remote Control Display Applicable AII outdoor unit models Models Method of Check disconnection of connector Check continuity of expansion valve coil Malfunction Detection Malfunction Error is generated under no common power supply when the power is on. Decision Conditions "...
  • Page 326 SiENBE18-621 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn power supply off, and turn power supply on again. External factor other than Return to normal? malfunction (for example, noise etc.).

  • Page 327: Abnormal Discharge Pipe Temperature

    Troubleshooting for Outdoor Unit SiENBE18-621 Abnormal Discharge Pipe Temperature Remote Control Display Applicable AII outdoor unit models Models Method of Abnormality is detected according to the temperature detected by the discharge pipe Malfunction temperature sensor. Detection Malfunction When the discharge pipe temperature rises to an abnormally high level Decision When the discharge pipe temperature rises suddenly Conditions...

  • Page 328: Refrigerant Overcharged

    SiENBE18-621 Troubleshooting for Outdoor Unit Refrigerant Overcharged Remote Control Display Applicable All outdoor unit models Models Method of Excessive charging of refrigerant is detected by using the heat exchanging deicer temperature Malfunction during a check operation. Detection Malfunction When the amount of refrigerant, which is calculated by using the heat exchanging deicer Decision temperature during a check run, exceeds the standard.

  • Page 329: Malfunction Of Thermistor For Outdoor Air (R1T)

    Troubleshooting for Outdoor Unit SiENBE18-621 Malfunction of Thermistor for Outdoor Air (R1T) Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the temperature detected by the outdoor air thermistor. Malfunction Detection Malfunction When the outside air temperature thermistor has short circuit or open circuit. Decision Conditions "...

  • Page 330: Malfunction Of Discharge Pipe Thermistor (R2T)

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.10 Malfunction of Discharge Pipe Thermistor (R2T) Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature Malfunction thermistor. Detection Malfunction When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected. Decision Conditions "...

  • Page 331: Malfunction Of Thermistor (R3T, R5T) For Suction Pipe1, 2

    Troubleshooting for Outdoor Unit SiENBE18-621 7.11 Malfunction of Thermistor (R3T, R5T) for Suction Pipe1, 2 Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2. Malfunction Detection Malfunction...

  • Page 332: Malfunction Of Thermistor (R4T) For Outdoor Unit Heat Exchanger

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.12 Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the heat exchange thermistor is detected.

  • Page 333: Malfunction Of Thermistor (R7T) For Outdoor Unit Liquid Pipe

    Troubleshooting for Outdoor Unit SiENBE18-621 7.13 Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the temperature detected by the liquid pipe thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the heat exchange thermistor is detected.

  • Page 334: Malfunction Of Subcooling Heat Exchanger Thermistor (R6T)

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.14 Malfunction of Subcooling Heat Exchanger Thermistor (R6T) Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor. Malfunction Detection Malfunction When the subcooling heat exchanger gas pipe thermistor is short circuited or open.

  • Page 335: Malfunction Of High Pressure Sensor

    Troubleshooting for Outdoor Unit SiENBE18-621 7.15 Malfunction of High Pressure Sensor Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction When the high pressure sensor is short circuit or open circuit. Decision Conditions "...

  • Page 336: Malfunction Of Low Pressure Sensor

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.16 Malfunction of Low Pressure Sensor Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the low pressure sensor is short circuit or open circuit. Decision Conditions "...

  • Page 337: Malfunction Of Pcb

    Troubleshooting for Outdoor Unit SiENBE18-621 7.17 Malfunction of PCB Remote Control Display Applicable AII outdoor unit models Models " Detect malfunctions by current value during waveform output before compressor startup. Method of " Detect malfunctions by current sensor value during synchronized operation at the time of Malfunction startup.

  • Page 338: Malfunction Of Inverter Radiating Fin Temperature Rise

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.18 Malfunction of Inverter Radiating Fin Temperature Rise Remote Control Display Applicable AII outdoor unit models Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction When the temperature of the inverter radiation fin increases above 83°C. Decision Conditions "...

  • Page 339: Inverter Compressor Abnormal

    Troubleshooting for Outdoor Unit SiENBE18-621 7.19 Inverter Compressor Abnormal Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When an excessive current flows in the power transistor. Decision (Instantaneous overcurrent also causes activation.) Conditions...

  • Page 340: Inverter Current Abnormal

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.20 Inverter Current Abnormal Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected by current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected. Decision Conditions "...

  • Page 341: Inverter Start Up Error

    Troubleshooting for Outdoor Unit SiENBE18-621 7.21 Inverter Start up Error Remote Control Display Applicable AII outdoor unit models Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected during startup Decision Conditions "...

  • Page 342: Malfunction Of Transmission Between Inverter And Control Pcb

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.22 Malfunction of Transmission between Inverter and Control PCB Remote Control Display Applicable AII outdoor unit models Models Method of Check the communication state between inverter PCB and control PCB by micro-computer. Malfunction Detection Malfunction When the correct communication is not conducted in certain period.

  • Page 343: High Voltage Of Capacitor In Main Inverter Circuit

    Troubleshooting for Outdoor Unit SiENBE18-621 7.23 High Voltage of Capacitor in Main Inverter Circuit Remote Control Display Applicable All outdoor unit models Models Method of Malfunction is detected according to the voltage waveform of main circuit capacitor built in the Malfunction inverter.

  • Page 344: Malfunction Of Inverter Radiating Fin Temperature Rise Sensor

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.24 Malfunction of Inverter Radiating Fin Temperature Rise Sensor Remote Control Display Applicable AII outdoor unit models Models Method of Resistance of radiation fin thermistor is detected when the compressor is not operating. Malfunction Detection Malfunction When the resistance value of thermistor becomes a value equivalent to open or short circuited Decision...

  • Page 345: Faulty Combination Of Inverter And Fan Driver

    Troubleshooting for Outdoor Unit SiENBE18-621 7.25 Faulty Combination of Inverter and Fan Driver Remote Control Display Applicable AII outdoor unit models Models Method of Check the communication state between inverter PCB and control PCB by micro-computer. Malfunction Detection Malfunction When the communication data about inverter PCB type is incorrect. Decision Conditions "...

  • Page 346: Low Pressure Drop Due To Refrigerant Shortage Or Electronic Expansion Valve Failure

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.26 Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Control Display Applicable AII outdoor unit models Models Method of Short of gas malfunction is detected by discharge pipe temperature thermistor and low pressure saturation temperature.
  • Page 347 Troubleshooting for Outdoor Unit SiENBE18-621 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Low pressure is Out of gas, closing of stop Cooling 0.25 MPa or valve or refrigerant system is less.

  • Page 348: Power Supply Insufficient Or Instantaneous Failure

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.27 Power Supply Insufficient or Instantaneous Failure Remote Control Display Applicable AII outdoor unit models Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction When the abnormal voltage of main circuit capacitor built in the inverter and abnormal power Decision...
  • Page 349 Troubleshooting for Outdoor Unit SiENBE18-621 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.03 Is the Refer to P.354 power supply voltage Correct power supply 200~240V ±10%? Is the P-N resistance not less than Field factors...

  • Page 350: Check Operation Not Executed

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.28 Check Operation not Executed Remote Control Display Applicable AII outdoor unit models Models Method of Check operation is executed or not Malfunction Detection Malfunction Malfunction is decided when the unit starts operation without check operation. Decision Conditions "...

  • Page 351: Malfunction Of Transmission Between Indoor Units And Outdoor Units

    Troubleshooting for Outdoor Unit SiENBE18-621 7.29 Malfunction of Transmission between Indoor Units and Outdoor Units Remote Control Display Applicable AII indoor unit models Models AII outdoor unit models Method of Microcomputer checks if transmission between indoor and outdoor units is normal. Malfunction Detection Malfunction...
  • Page 352 SiENBE18-621 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. the indoor or outdoor unit PC board been replaced, or has the indoor - outdoor Push and hold the RESET or outdoor - outdoor unit button on the master outdoor...

  • Page 353: Malfunction Of Transmission Between Remote Control And Indoor Unit

    Troubleshooting for Outdoor Unit SiENBE18-621 7.30 Malfunction of Transmission between Remote Control and Indoor Unit Remote Control Display Applicable AII indoor unit models Models Method of In case of controlling with 2-remote control, check the system using microcomputer is signal transmission between indoor unit and remote control (main and sub) is normal.

  • Page 354: Malfunction Of Transmission Between Main And Sub Remote Controls

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.31 Malfunction of Transmission between Main and Sub Remote Controls Remote Control Display Applicable AII indoor unit models Models Method of In case of controlling with 2-remote control, check the system using microcomputer if signal transmission between indoor unit and remote control (main and sub) is normal.

  • Page 355: Malfunction Of Transmission Between Indoor And Outdoor Units In The Same System

    Troubleshooting for Outdoor Unit SiENBE18-621 7.32 Malfunction of Transmission between Indoor and Outdoor Units in the Same System Remote Control Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions " Malfunction of transmission within or outside of other system Supposed "...
  • Page 356 SiENBE18-621 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. "U9" has been displayed for 2 Re-diagnose by display after minutes or more. passage of 2 minutes or more. Turn on all indoor units.

  • Page 357: Excessive Number Of Indoor Units

    Troubleshooting for Outdoor Unit SiENBE18-621 7.33 Excessive Number of Indoor Units Remote Control Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions " Excess of connected indoor units Supposed " Defect of outdoor unit PCB (A1P) Causes "...

  • Page 358: Address Duplication Of Central Remote Control

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.34 Address Duplication of Central Remote Control Remote Control Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions " Address duplication of centralized remote control Supposed " Defect of indoor unit PCB Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...

  • Page 359: Malfunction Of Transmission Between Central Remote

    Troubleshooting for Outdoor Unit SiENBE18-621 7.35 Malfunction of Transmission between Central Remote Control and Indoor Unit Remote Control Display Applicable AII indoor unit models Models Centralized controller Method of Microcomputer checks if transmission between indoor unit and centralized remote control is normal.
  • Page 360 SiENBE18-621 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. an indoor unit once connected been remove Reset power supply or its address simultaneously for all optional changed? controllers for centralized control.

  • Page 361: System Is Not Set Yet

    Troubleshooting for Outdoor Unit SiENBE18-621 7.36 System is not Set yet Remote Control Display Applicable All indoor unit models Models All outdoor unit models Method of On check operation, the number of indoor units in terms of transmission is not corresponding to Malfunction that of indoor units that have made changes in temperature.

  • Page 362: Malfunction Of System, Refrigerant System Address Undefined

    SiENBE18-621 Troubleshooting for Outdoor Unit 7.37 Malfunction of System, Refrigerant System Address Undefined Remote Control Display Applicable All indoor unit models Models All outdoor unit models Method of Malfunction Detection Malfunction Decision Conditions " Improper connection of transmission wiring between outdoor unit and outdoor unit outside Supposed control adapter Causes...

  • Page 363: Check

    Check SiENBE18-621 8. Check Check No.01 Check for causes of rise in high pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. !Check to be sure the stop valve is open. Stop valve closed Local High pipe !Conduct visual checks for pipe conditions.
  • Page 364 SiENBE18-621 Check Check No.02 Check for causes of drop in low pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. [In cooling] !Are the electrical characteristics normal? Faulty low pressure sensor (See *1.) Faulty compressor !Is the pressure value checked with the Service Checker Faulty low Faulty control PCB...
  • Page 365 Check SiENBE18-621 Check No. 03 Check for Fan Motor Connector (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. Measurement point Judgment 1 White...

  • Page 366: Thermistor Resistance / Temperature Characteristics

    SiENBE18-621 Thermistor Resistance / Temperature Characteristics 9. Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit For outdoor air Outdoor unit for fin thermistor For suction pipe 1 For heat exchanger For suction pipe 2 For Subcooling heat exchanger outlet R6T For Liquid pipe...
  • Page 367 Thermistor Resistance / Temperature Characteristics SiENBE18-621 Outdoor Unit Thermistors for Discharge Pipe (R2T) (kΩ) T°C T°C T°C 640.44 624.65 72.32 70.96 13.35 13.15 609.31 594.43 69.64 68.34 12.95 12.76 579.96 565.78 67.06 65.82 12.57 12.38 552.00 538.63 64.60 63.41 12.20 12.01 525.63 512.97...

  • Page 368: Pressure Sensor

    SiENBE18-621 Pressure Sensor 10.Pressure Sensor = 1.38V-0.69 : Detected Pressure [High Side] MPa = 0.57V-0.28 : Detected Pressure [Low Side] MPa : High pressure (MPa) : Output Voltage [High Side] V Detected Pressure : Low pressure (MPa) : Output Voltage [Low Side] V V : Voltage (V) High Pressure (P Low Pressure (P...

  • Page 369: Method Of Replacing The Inverter's Power Transistors Modules

    Method of Replacing The Inverter’s Power Transistors Modules SiENBE18-621 11.Method of Replacing The Inverter’s Power Transistors Modules Checking failures in power semiconductors mounted on inverter PCB Check the power semiconductors mounted on the inverter PCB by the use of a multiple tester. <Items to be prepared>...
  • Page 370 SiENBE18-621 Method of Replacing The Inverter’s Power Transistors Modules Power module checking When using the digital type of multiple tester, make measurement in diode check mode. Tester terminal Criterion Remark It may take time to Not less than 0.3V determine the (including ?)* voltagedue to capacitor charge or...
  • Page 371 Method of Replacing The Inverter’s Power Transistors Modules SiENBE18-621 Troubleshooting...

  • Page 372: Part 9 Appendix

    SiENBE18-621 Part 9 Appendix 1. Piping Diagrams..................362 1.1 Outdoor Units ..................362 1.2 BP Units ....................363 1.3 Indoor Units ..................364 2. Wiring Diagrams..................369 2.1 Outdoor Units ..................369 2.2 BP Units ....................370 2.3 Indoor Units ..................371 Appendix...

  • Page 373: Piping Diagrams

    Piping Diagrams SiENBE18-621 1. Piping Diagrams Outdoor Units RMXS112/140/160E7V3B Electronic expansion valve Double pipe Electronic heat exchanger expansion valve Filter Heat exchanger Pressure regulating valve Filter Service port Four way valve High pressure Service port sensor Low pressure sensor Filter Capillary tube Solenoid...

  • Page 374: Bp Units

    SiENBE18-621 Piping Diagrams BP Units BPMKS967B2B INDOOR UNIT GAS SIDE ROOM A REFRIGERANT FLOW THERMISTOR ( DGA ) ( 15.9CuT ) HEATING LOCAL PIPING COOLING GAS SIDE ROOM B THERMISTOR ( DGB ) ( 15.9CuT ) LOCAL PIPING ELECTRONIC EXPANSION VALVE ( BYPASS ) ELECTRONIC INDOOR UNIT FILTER...

  • Page 375: Indoor Units

    Piping Diagrams SiENBE18-621 Indoor Units 1.3.1 Wall Mounted Type FTXS20/25/35D3VMW(L) FTXS50D2V1W(L) Indoor unit Indoor unit Maffler Assy Heat exchanger 7.0Cut Maffler Assy Heat exchanger 7.0Cut 6.4Cut 6.4Cut Thermistor 6.4Cut on heat exch. Thermistor 6.4Cut on heat exch. 6.4Cut 6.4Cut Cross flow fan Field piping Cross flow fan Field piping...
  • Page 376 SiENBE18-621 Piping Diagrams FTXS71EV1B, FTXS71BAVMB Indoor unit 7.9Cut Heat exchanger Thermistor on heat exch. Cross flow fan Field piping 6.4Cut Fan motor Field piping 12.7Cut 12.7Cut Refrigerant flow cooling heating 4D040082M 1.3.2 Duct Connected Type FDXS25/35CAVMB, FDXS50/60CVMB, FDXS25/35EAVMB Indoor unit (6.4Cut) Heat exchanger Thermistor...
  • Page 377 Piping Diagrams SiENBE18-621 1.3.3 Floor / Ceiling Suspended Dual Type FLXS25/35BAVMB FLXS50/60BAVMB Indoor unit Indoor unit 6.4Cut 9.5Cut Heat exchanger Heat exchanger Thermistor Thermistor Field piping Field piping on heat on heat exch. exch. 6.4Cut 6.4Cut Sirocco fan Sirocco fan Fan motor Fan motor Field piping...
  • Page 378 SiENBE18-621 Piping Diagrams 1.3.4 Floor Standing Type FVXS25/35BAVMB Indoor unit Heat exchanger Thermistor on heat Cross flow fan Fan motor exch. (7.0Cut) (7.0Cut) Cross flow fan Fan motor Field piping (6.4Cut) Single union joint Field piping (9.5Cut) (9.5Cut) Single union joint Refrigerant flow cooling heating...
  • Page 379 Piping Diagrams SiENBE18-621 1.3.5 Ceiling Mounted Cassette Type FFQ25/35/50/60B8V1B Indoor heat exchanger MODEL FFQ25 · 35B8V1B FFQ50 · 60B8V1B 12.7 Field piping φ C1220T-O Outdoor unit Field piping φ C1220T-O Indoor unit C : 4D039335 1.3.6 Ceiling Suspended Type FHQ35/50/60BVV1B Indoor heat exchanger φ...

  • Page 380: Wiring Diagrams

    SiENBE18-621 Wiring Diagrams 2. Wiring Diagrams Outdoor Units RMXS112/140/160E7V3B Appendix...

  • Page 381: Bp Units

    Wiring Diagrams SiENBE18-621 BP Units BPMKS967B2B ( DLA ) ( DGA ) ( DLB ) ( DGB ) t° t° t° t° FIELD WIRING X22A ROOM B ( BLU ) X21A LEDA ROOM A INDOOR ( RED ) LED1 ROOM A LED2 TRANSMISSION X20A...

  • Page 382: Indoor Units

    SiENBE18-621 Wiring Diagrams Indoor Units 2.3.1 Wall Mounted Type FTXS20/25/35D3VMW(L) FIELD WIRING. PCB3 PCB1 ∼ ∼ RECTIFIER LED1 3.15A OUTDOOR LED2 CAUTION LED3 TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN t°...
  • Page 383 Wiring Diagrams SiENBE18-621 FTXS50D2V1W(L) FIELD WIRING. PCB1 PCB3 RECTIFIER 3.15A LED1 OUTDOOR LED2 CAUTION LED3 GRN/YLW TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. t° : FRAME GROUND : FUSE H1P~H3P : PILOT LAMP...
  • Page 384 SiENBE18-621 Wiring Diagrams 2.3.2 Duct Connected Type FDXS25/35CAVMB, FDXS50/60CVMB, FDXS25/35EAVMB PCB1 PCB2 V1TR outdoor 3.15A LED LED LED H1P H2P FIELD WIRING. TERMINAL FOR CAUTION CENTRALIZED CONTROL TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK SIGNAL ON AGAIN.
  • Page 385 Wiring Diagrams SiENBE18-621 2.3.4 Floor Standing Type FVXS25/35/50BAVMB 3.15A PCB3 → S2W ( 4 ) outdoor GRN/YLW TRANSMISSION INFRARED PCB2 FIELD WIRING. CIRCUIT REMOTE PCB1 CONTROL PCB4 : PROTECTIVE EARTH : FUSE S201 S202 H1P~H2P, H3P : PILOT LAMP : FAN MOTOR SIGNAL M1F, M2F : LIMIT SWITCH...
  • Page 386 SiENBE18-621 Wiring Diagrams 2.3.5 Ceiling Mounted Cassette Type FFQ25/35/50/60B8V1B : CONNECTOR DISCRIMINATION COLOUR FOR COMPONENTS. : CONNECTOR COLOUR FOR COMPONENTS. : CONNECTOR COLOUR FOR PRINTED CIRCUIT BOARD. t° IN CASE OF SIMULTANEOUS t° t° OPERATION SYSTEM INDOOR UNIT INDOOR UNIT (MASTER) (SLAVE) NOTE 5...
  • Page 387 Wiring Diagrams SiENBE18-621 2.3.6 Ceiling Suspended Type FHQ35/50/60BVV1B : CONNECTER DISCRIMINATION COLOUR FOR COMPONENTS. : CONNECTER COLOUR FOR COMPONENTS. IN CASE OF SIMULTANEOUS t° : CONNECTER COLOUR FOR PRINTED CIRCUIT BOARD. OPERATION SYSTEM t° t° INDOOR UNIT INDOOR UNIT TO OUTDOOR (MASTER) X19A X18A...

  • Page 388: Index

    SiENBE18-621 Index fan motor connector output check ..278, 298 Hall IC check ..........280 A1 ..............270, 281 limit switch continuity check ......278 A1P ................25 power supply waveforms check ....306 A2P ................26 thermistor resistance check ....279, 299 A3 .................282 check for causes of drop in low pressure ....
  • Page 389 SiENBE18-621 C5 ..............292 fan motor or related abnormality C7 ..............277 AC motor ............273 C9 ............276, 293 DC motor ............274 CJ ..............294 fan speed control ........... 86 E1 ..............307 fan speed setting ..... 30, 33, 35, 37, 39, 42 E2 ..............301 faulty BP liquid pipe thermistor ......
  • Page 390 SiENBE18-621 INTELLIGENT EYE sensor PCB ....32, 34, 36 unit No. change ..........145 inverter compressor abnormal ......328 malfunction code indication inverter current abnormal ........329 by outdoor unit PCB ........264 inverter POWERFUL operation ......95 malfunction code, list ........... 268 inverter protection control ........76 malfunction hysteresis .........
  • Page 391 SiENBE18-621 refrigerant overcharged ........317 refrigerant recovery mode ........134 N ................24 remote control ............. 255 N1 ................29 remote control thermistor ........294 N2 ................29 remote control thermostat ........105 NA ................27 restart standby ............71 names of parts .............155 RTH1 ...........
  • Page 392 SiENBE18-621 swing flap motor malfunction / lock ......288 system is not set yet ..........350 X106A ..............24 X107A ..............24 X111A ..............24 test operation X11A ..............24 procedure and outline ........112 X12A ..............24 test operation from the remote control ....146 X13A ..............
  • Page 393 SiENBE18-621 Index...

  • Page 394: Drawings & Flow Charts

    SiENBE18-621 Drawings & Flow Charts infrared remote control ........138 freeze-up protection control ......77, 100 abnormal discharge pipe temperature ....316 freeze-up protection control or actuation of high pressure switch ......308 high pressure control ........271 actuation of low pressure sensor ......310 full closing of electronic expansion valves .....
  • Page 395 SiENBE18-621 malfunction of inverter radiating fin FTXS20/25/35D3VMW(L) ......364 temperature rise ..........327 FTXS50/60EV1B .......... 364 malfunction of inverter radiating fin FTXS50D2VMW(L) ........364 temperature rise sensor ........333 FTXS71BAVMB ..........365 malfunction of low pressure sensor ......325 FTXS71EV1B ..........365 malfunction of moving part of electronic FVXS25/35BAVMB ........
  • Page 396 SiENBE18-621 wired remote control field setting ............137 wireless address switch (SS2) ......141 infrared remote control field setting ............138 wiring diagrams BPMKS967B2B ..........370 BPMKS967B3B ..........370 FDXS25/35CAVMB ........373 FDXS25/35EAVMB ........373 FDXS50/60CVMB ..........373 FFQ25/35/50/60B8V1B .........375 FHQ35/50/60BVV1B ........376 FLXS25/35/50/60BAVMB ......373 FTXS20/25/35CAVMB ........371 FTXS20/25/35D3VMW(L) ......371 FTXS50/60/71EV1B ........372 FTXS50D2V1W(L) .........372 FTXS71BAVMB ..........372...
  • Page 397 SiENBE18-621 Drawings & Flow Charts...
  • Page 398 Specifications are subject to change without environment. This challenge demands the eco design prior notice. Daikin Europe N.V. explicitly rejects any liability for any direct or and development of a wide range of products and an indirect damage, In the broadest sense, arising from or related to the use energy management system, resulting in energy and/or interpretation of this publication.

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