Daikin F-Series Service Manual
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Daikin F-Series Service Manual

Inverter multi for 2 rooms
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See also: Service Manual , Technical Manual
SiBE12- 712C
Inverter Multi for 2 Rooms
F-Series
[Applied Models]
Inverter Multi : Cooling Only
Inverter Multi : Heat Pump

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Summary of Contents for Daikin F-Series

  • Page 1 SiBE12- 712C Inverter Multi for 2 Rooms F-Series [Applied Models] Inverter Multi : Cooling Only Inverter Multi : Heat Pump...
  • Page 2 SiBE12-712C Inverter Multi for 2 Rooms F-Series Cooling Only Outdoor Unit Indoor Unit 2MKS40FV1B FTKS20D3VMW(L) FDKS25CAVMB 2MKS50FV1B FTKS25D3VMW(L) FDKS35CAVMB FTKS35D3VMW(L) FDKS50CVMB FTKS50D2V1W(L) FDKS25EAVMB FTKS20CAVMB FDKS35EAVMB FTKS25CAVMB FLKS25BAVMB FTKS35CAVMB FLKS35BAVMB FLKS50BAVMB FVXS25FV1B FVXS35FV1B FVXS50FV1B 2AMK40FV1B ATKS20E2V1B ATKS20DAVMB 2AMK50FV1B ATKS25E2V1B ATKS25DAVMB ATKS35E2V1B...
  • Page 3 SiBE12-712C Heat Pump Outdoor Unit Indoor Unit 2MXS40FV1B FTXG25EV1BW(S) FDXS25CAVMB 2MXS50FV1B FTXG35EV1BW(S) FDXS35CAVMB CTXG50EV1BW(S) FDXS50CVMB FTXS20D3VMW(L) FDXS25EAVMB FTXS25D3VMW(L) FDXS35EAVMB FTXS35D3VMW(L) FLXS25BAVMB FTXS50D2V1W(L) FLXS35BAVMB FTXS20CAVMB FLXS50BAVMB FTXS25CAVMB FVXS25FV1B FTXS35CAVMB FVXS35FV1B FVXS50FV1B 2AMX40FV1B ATXG25EV1B ATXS25EV1B7 2AMX40F2V1B ATXG35EV1B ATXS35EV1B7 2AMX50FV1B ATXG50EV1B ATXS50EV1B7 2AMX50F2V1B ATXS20E2V1B ATXS20DAVMB ATXS25E2V1B...

  • Page 4: Table Of Contents

    SiBE12-712C 1. Introduction .................... vi 1.1 Safety Cautions ..................vi 1.2 Used Icons ....................x Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................8 Part 2 Specifications ..............17 1. Specifications ..................18 1.1 Cooling Only...................18 1.2 Heat Pump .....................31 Part 3 Printed Circuit Board Connector Wiring Diagram ...
  • Page 5 SiBE12-712C 2.11 Electronic Expansion Valve Control ............98 2.12 Malfunctions ..................102 2.13 Forced Operation Mode ...............103 2.14 Additional Function................104 Part 5 Operation Manual ............105 1. System Configuration................106 1.1 Operation Instructions ................106 2. Instruction....................107 2.1 FTK(X)S, ATK(X)S, F(C)(A)TXG, FLK(X)S Series.......107 2.2 FVXS Series..................170 Part 6 Service Diagnosis............
  • Page 6 SiBE12-712C Part 7 Removal Procedure ............255 1. Outdoor Unit..................256 1.1 Removal of the Panels and Plates ............256 1.2 Removal of the Electrical Box ..............258 1.3 Removal of the PCB................263 1.4 Removal of the Sound Blanket.............268 1.5 Removal of the Propeller Fan / Fan Motor ...........270 1.6 Removal of the Thermistors ..............273 1.7 Removal of the Compressor..............275 1.8 Removal of the Four Way Valve / Electronic Expansion Valve ....277...

  • Page 7: Introduction

    Introduction SiBE12-712C 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 8 SiBE12-712C Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2m). Insufficient safety measures may cause a fall accident. In case of R410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R410A refrigerant.
  • Page 9 Introduction SiBE12-712C 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 10 SiBE12-712C Introduction Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.

  • Page 11: Used Icons

    Introduction SiBE12-712C Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor.

  • Page 12: Part 1 List Of Functions

    SiBE12-712C Part 1 List of Functions 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................8 List of Functions...

  • Page 13: List Of Functions

    List of Functions SiBE12-712C 1. List of Functions Cooling Only Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — — Function Clean Operation Limit for Cooling (°CDB) — — — Operation Limit for Heating (°CWB) —...
  • Page 14 SiBE12-712C List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 15 List of Functions SiBE12-712C Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 16 SiBE12-712C List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 17 List of Functions SiBE12-712C Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — Operation Limit for Heating (°CWB) — — Photocatalytic Deodorizing Filter —...
  • Page 18 SiBE12-712C List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...

  • Page 19: Heat Pump

    List of Functions SiBE12-712C Heat Pump Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — — Function Clean Operation Limit for Cooling (°CDB) — — — Operation Limit for Heating (°CWB) — —...
  • Page 20 SiBE12-712C List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — Operation Limit for Heating (°CWB) — — Photocatalytic Deodorizing Filter —...
  • Page 21 List of Functions SiBE12-712C Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 22 SiBE12-712C List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 23 List of Functions SiBE12-712C Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –10 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 24 SiBE12-712C List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) — Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 25 List of Functions SiBE12-712C Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — Operation Limit for Heating (°CWB) — — Photocatalytic Deodorizing Filter —...
  • Page 26 SiBE12-712C List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Operation Limit for Heating (°CWB) –10 Air Purifying Filter with Photocatalytic Deodorizing Function —...
  • Page 27 List of Functions SiBE12-712C List of Functions...

  • Page 28: Part 2 Specifications

    SiBE12-712C Part 2 Specifications 1. Specifications ..................18 1.1 Cooling Only...................18 1.2 Heat Pump .....................31 Specifications...

  • Page 29: Specifications

    Specifications SiBE12-712C 1. Specifications Cooling Only 1.1.1 Indoor Units Wall Mounted Type 50Hz 230V Model FTKS20D3VMW FTKS20D3VML Rated Capacity 2.0kW Class 2.0kW Class Front Panel Color White Silver Line 8.7 (307) 8.7 (307) 6.7 (237) 6.7 (237) m³/min Airflow Rates (cfm) 4.7 (166) 4.7 (166)
  • Page 30 SiBE12-712C Specifications 50Hz 230V Model FTKS35D3VMW FTKS35D3VML Rated Capacity 3.5kW Class 3.5kW Class Front Panel Color White Silver Line 8.9 (314) 8.9 (314) 6.9 (244) 6.9 (244) m³/min Airflow Rates (cfm) 4.8 (169) 4.8 (169) 4.0 (141) 4.0 (141) Type Cross Flow Fan Cross Flow Fan Motor Output...
  • Page 31 Specifications SiBE12-712C 50Hz 230V Model FTKS20CAVMB FTKS25CAVMB Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 7.7 (272) 7.7 (272) 5.9 (208) 5.9 (208) m³/min Airflow Rates (cfm) 4.2 (148) 4.2 (148) 3.6 (127) 3.6 (127) Type Cross Flow Fan Cross Flow Fan Motor Output Speed...
  • Page 32 SiBE12-712C Specifications 50Hz 230V Model ATKS20E2V1B ATKS25E2V1B Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 8.7 (307) 8.7 (307) 6.7 (237) 6.7 (237) m³/min Airflow Rates (cfm) 4.7 (166) 4.7 (166) 3.9 (138) 3.9 (138) Type Cross Flow Fan Cross Flow Fan Motor Output Speed...
  • Page 33 Specifications SiBE12-712C 50Hz 230V Model ATKS25DAVMB ATKS35DAVMB Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.7 (272) 7.7 (272) 5.9 (208) 6.0 (212) m³/min Airflow Rates (cfm) 4.2 (148) 4.4 (155) 3.6 (127) 3.8 (134) Type Cross Flow Fan Cross Flow Fan Motor Output Speed...
  • Page 34 SiBE12-712C Specifications Duct Connected Type 50Hz 230V Model FDKS25CAVMB FDKS35CAVMB Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color External Static Pressure 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Airflow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type...
  • Page 35 Specifications SiBE12-712C 50Hz 230V Model FDKS25EAVMB FDKS35EAVMB Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color External Static Pressure 8.7 (307) 8.7 (307) 8.0 (282) 8.0 (282) m³/min Airflow Rates (cfm) 7.3 (258) 7.3 (258) 6.2 (219) 6.2 (219) Type Sirocco Fan Sirocco Fan...
  • Page 36 SiBE12-712C Specifications Floor / Ceiling Suspended Dual Type 50Hz 230V Model FLKS25BAVMB FLKS35BAVMB Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 8.6 (304) 6.8 (240) 7.6 (268) m³/min Airflow Rates (cfm) 6.0 (212) 6.6 (233) 5.2 (184) 5.6 (198)
  • Page 37 Specifications SiBE12-712C Floor Standing Type 50Hz 230V Model FVXS25FV1B FVXS35FV1B Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 8.2 (290) 8.5 (300) 6.5 (229) 6.7 (237) m³/min Airflow Rates (cfm) 4.8 (169) 4.9 (174) 4.1 (146) 4.5 (158) Type Turbo Fan Turbo Fan...
  • Page 38 SiBE12-712C Specifications 1.1.2 Outdoor Units 50Hz 220-230-240V Model 2MKS40FV1B Cooling Capacity — Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 1YC23ABXD Motor Output Model FVC50K Refrigerant Charge 0.45 Type R-410A Refrigerant Charge 1.20 m³/min...
  • Page 39 Specifications SiBE12-712C 50Hz 220-230-240V Model 2MKS50FV1B — Cooling Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD Motor Output 1,100 Model FVC50K Refrigerant Oil Charge 0.65 Type R-410A Refrigerant Charge 1.60 m³/min Airflow Rates...
  • Page 40 SiBE12-712C Specifications 50Hz 220-230-240V Model 2AMK40FV1B — Cooling Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 1YC23ABXD Motor Output Model FVC50K Refrigerant Oil Charge 0.45 Type R-410A Refrigerant Charge 1.20 m³/min Airflow Rates 1,271...
  • Page 41 Specifications SiBE12-712C 50Hz 220-230-240V Model 2AMK50FV1B — Cooling Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD Motor Output 1,100 Model FVC50K Refrigerant Oil Charge 0.65 Type R-410A Refrigerant Charge 1.60 m³/min Airflow Rates...

  • Page 42: Heat Pump

    SiBE12-712C Specifications Heat Pump 1.2.1 Indoor Units Wall Mounted Type 50Hz 220-230-240V FTXG25EV1BW FTXG25EV1BS Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 2.5kW Class Front Panel Color Mat Crystal White Mat Crystal Silver 7.7 (271) 9.0 (317) 7.7 (271) 9.0 (317) 6.1 (215) 7.9 (278)
  • Page 43 Specifications SiBE12-712C 50Hz 220-230-240V CTXG50EV1BW CTXG50EV1BS Model Cooling Heating Cooling Heating Rated Capacity 5.0kW Class 5.0kW Class Front Panel Color Mat Crystal White Mat Crystal Silver 11.3 (398) 12.6 (444) 11.3 (398) 12.6 (444) 9.1 (320) 10.6 (373) 9.1 (320) 10.6 (373) m³/min Airflow Rates...
  • Page 44 SiBE12-712C Specifications 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 Airflow Rates (cfm) 4.7 (166)
  • Page 45 Specifications SiBE12-712C 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 Airflow Rates (cfm) 4.8 (169)
  • Page 46 SiBE12-712C Specifications 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 Airflow Rates (cfm) 4.2 (148) 5.3 (187)
  • Page 47 Specifications SiBE12-712C 50Hz 220-230-240V ATXG25EV1B ATXG35EV1B Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Mat Crystal White Mat Crystal White 7.7 (271) 9.0 (317) 8.1 (285) 9.6 (338) 6.1 (215) 7.9 (278) 6.5 (229) 8.2 (289) m³/min Airflow Rates...
  • Page 48 SiBE12-712C Specifications 50Hz 230V ATXS20E2V1B ATXS25E2V1B Model Cooling Heating Cooling Heating Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 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 Airflow Rates (cfm) 4.7 (166) 5.8 (205)
  • Page 49 Specifications SiBE12-712C 50Hz 220-240V ATXS25EV1B7 ATXS35EV1B7 Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 8.7 (307) 9.4 (332) 8.9 (314) 9.7 (342) 6.7 (237) 7.6 (268) 6.9 (244) 7.9 (279) m³/min Airflow Rates (cfm) 4.7 (166) 5.8 (205)
  • Page 50 SiBE12-712C Specifications 50Hz 230V ATXS20DAVMB Model Cooling Heating Rated Capacity 2.0kW Class Front Panel Color White 7.7 (272) 7.8 (275) 5.9 (208) 6.5 (230) m³/min Airflow Rates (cfm) 4.2 (148) 5.3 (187) 3.6 (127) 4.6 (162) Type Cross Flow Fan Motor Output Speed Steps...
  • Page 51 Specifications SiBE12-712C Duct Connected Type 50Hz 230V FDXS25CAVMB FDXS35CAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color External Static Pressure 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...
  • Page 52 SiBE12-712C Specifications 50Hz 230V FDXS25EAVMB FDXS35EAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color External Static Pressure 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 Airflow Rates (cfm)
  • Page 53 Specifications SiBE12-712C 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 54 SiBE12-712C Specifications Floor Standing Type 50Hz 230V FVXS25FV1B FVXS35FV1B Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 8.2 (290) 8.8 (311) 8.5 (300) 9.4 (332) 6.5 (229) 6.9 (244) 6.7 (237) 7.3 (258) m³/min Airflow Rates (cfm)
  • Page 55 Specifications SiBE12-712C 1.2.2 Outdoor Units 50Hz 220-230-240V 2MXS40FV1B Model Cooling Heating Capacity — Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 1YC23ABXD Motor Output Model FVC50K Refrigerant Charge 0.45 Type R-410A Refrigerant Charge 1.20...
  • Page 56 SiBE12-712C Specifications 50Hz 220-230-240V 2MXS50FV1B Model Cooling Heating — Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD Motor Output 1,100 Model FVC50K Refrigerant Oil Charge 0.65 Type R-410A Refrigerant Charge 1.60 m³/min...
  • Page 57 Specifications SiBE12-712C 50Hz 220-230-240V 2AMX40FV1B Model Cooling Heating Capacity — Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 1YC23ABXD Motor Output Model FVC50K Refrigerant Oil Charge 0.45 Type R-410A Refrigerant Charge 1.20 m³/min Airflow Rate...
  • Page 58 SiBE12-712C Specifications 50Hz 220-240V 2AMX40F2V1B Model Cooling Heating — Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 1YC23AGXD Motor Output Model FVC50K Refrigerant Oil Charge 0.45 Type R-410A Refrigerant Charge 1.20 m³/min Airflow Rates...
  • Page 59 Specifications SiBE12-712C 50Hz 220-230-240V 2AMX50FV1B Model Cooling Heating — Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD Motor Output 1,100 Model FVC50K Refrigerant Oil Charge 0.65 Type R-410A Refrigerant Charge 1.60 m³/min...
  • Page 60 SiBE12-712C Specifications 50Hz 220-240V 2AMX50F2V1B Model Cooling Heating — Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD Motor Output 1,100 Model FVC50K Refrigerant Oil Charge 0.65 Type R-410A Refrigerant Charge 1.60 m³/min...
  • Page 61 Specifications SiBE12-712C Specifications...

  • Page 62: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE12-712C Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........52 1.1 Wall Mounted Type ................52 1.2 Duct Connected Type................58 1.3 Floor / Ceiling Suspended Dual Type.............60 1.4 Floor Standing Type ................63 1.5 Outdoor Unit ...................65 Printed Circuit Board Connector Wiring Diagram...

  • Page 63: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram SiBE12-712C Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 1.1.1 FTK(X)S 20-50 D, ATKS 20/25/35 E, ATXS 20-50 E Connectors PCB(1) (Control PCB) Connector for fan motor Connector for swing motor (horizontal blades) Connector for centralized control (HA)
  • Page 64 SiBE12-712C Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) +12V LED A (R6039) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R5234) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4291) Printed Circuit Board Connector Wiring Diagram...
  • Page 65 Printed Circuit Board Connector Wiring Diagram SiBE12-712C 1.1.2 FTK(X)S 20/25/35 C, ATK(X)S 20/25/35 D Connectors PCB(1) (Control PCB) Connector for AC fan motor Connector for swing motor (Horizontal Flap) Connector for AC fan motor Connector for centralized control to 5 rooms Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for INTELLIGENT EYE Sensor PCB...
  • Page 66 SiBE12-712C Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB PCB(2): Signal Receiver PCB PCB(3): INTELLIGENT EYE Sensor PCB Printed Circuit Board Connector Wiring Diagram...
  • Page 67 Printed Circuit Board Connector Wiring Diagram SiBE12-712C 1.1.3 FTXG 25/35 E, CTXG 50 E, ATXG 25-50 E Connectors PCB(1) (Control PCB) Connector for fan motor Connector for centralized control (HA) Connector for heat exchanger thermistor Connector for INTELLIGENT EYE sensor PCB and control Connector for swing motor Connector for signal receiver PCB Connector for reduction motor (front panel mechanism)
  • Page 68 SiBE12-712C Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) JA JC (R4991) PCB(2): Signal Receiver PCB RTH1 LED4 LED2 LED3 (R4992) PCB(3): INTELLIGENT EYE sensor PCB (R4988) Printed Circuit Board Connector Wiring Diagram...

  • Page 69: Duct Connected Type

    Printed Circuit Board Connector Wiring Diagram SiBE12-712C Duct Connected Type Connectors PCB(1) (Control PCB) Connector for AC fan motor Connector for AC fan motor Connector for centralized control to 5 rooms Connector for display PCB Connector for heat exchanger thermistor PCB(2) (Display PCB) Connector for control PCB Note:...
  • Page 70 SiBE12-712C Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Control PCB (indoor unit) LED A 2P131149 PCB Detail PCB (2): Display PCB 2P084375 Printed Circuit Board Connector Wiring Diagram...

  • Page 71: Floor / Ceiling Suspended Dual Type

    Printed Circuit Board Connector Wiring Diagram SiBE12-712C Floor / Ceiling Suspended Dual Type Connectors PCB(1) (Control PCB) Connector for swing motor (horizontal swing) Connector for fan motor Connector for centralized control Connector for display PCB Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for power supply PCB PCB(2) (Power Supply PCB)
  • Page 72 SiBE12-712C Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Control PCB (indoor unit) PCB Detail PCB (2): Power Supply PCB Printed Circuit Board Connector Wiring Diagram...
  • Page 73 Printed Circuit Board Connector Wiring Diagram SiBE12-712C PCB (3): Display PCB PCB (4): Signal Receiver PCB EX511 REV 12 PHOTO 2P084377- 1 S31(RTH) (R4977) Printed Circuit Board Connector Wiring Diagram...

  • Page 74: Floor Standing Type

    SiBE12-712C Printed Circuit Board Connector Wiring Diagram Floor Standing Type Connectors PCB(1) (Sensor PCB) Connector for control PCB PCB(2) (Control PCB) Connector for fan motor Connector for centralized control Connector for service PCB Connector for lower air outlet motor Connector for swing motor Connector for display PCB Connector for sensor PCB PCB(3) (Service PCB)
  • Page 75 Printed Circuit Board Connector Wiring Diagram SiBE12-712C PCB Detail PCB(1): Sensor PCB 3P191450 PCB(2): Control PCB (indoor unit) LED A 2P191446 PCB(3): Service PCB PCB(3): Display PCB LED1 LED2 3P191447 3P191448 Printed Circuit Board Connector Wiring Diagram...

  • Page 76: Outdoor Unit

    SiBE12-712C Printed Circuit Board Connector Wiring Diagram Outdoor Unit Connectors PCB (1) (Control PCB) Connector for electronic expansion valve coil A port Connector for electronic expansion valve coil B port Connector for overload protector Connector for terminal strip Connector for fan motor Connector for four way valve coil Connector for thermistor (outdoor air, condenser, and discharge pipe)
  • Page 77 Printed Circuit Board Connector Wiring Diagram SiBE12-712C PCB Detail PCB (1): Control PCB (40 class) LED A S20 S91 S90 S92 2P190760 PCB (1): Control PCB (50 class) LED A 2P197402 Printed Circuit Board Connector Wiring Diagram...

  • Page 78: Part 4 Function And Control

    SiBE12-712C Part 4 Function and Control 1. Main Functions..................68 1.1 Frequency Principle................68 1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..70 1.3 Operation Starting Control..............72 1.4 Fan Speed Control for Indoor Units............73 1.5 Programme Dry Function ...............74 1.6 Automatic Operation................75 1.7 Thermostat Control.................76 1.8 Night Set Mode..................77 1.9 ECONO Mode ..................78...

  • Page 79: Main Functions

    Main Functions SiBE12-712C 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
  • Page 80 SiBE12-712C Main Functions Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outdoor air temperature and cooling / heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.

  • Page 81: Power-Airflow Dual Flaps, Wide Angle Louvers And Auto-Swing

    Main Functions SiBE12-712C 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 control area in cooling, heating and dry mode. Dual Flaps Heating Mode During heating mode, the large flap enables direct warm air straight downwards.
  • Page 82 SiBE12-712C Main Functions 3-D Airflow FTXG25/35E, CTXG50E, ATXG25-50E Alternative repetition of vertical and horizontal swing motions enables uniform air- conditioning of the entire room. This function is effective for starting the air conditioner. When the horizontal swing and vertical swing are both set to auto mode, the airflow become 3-D airflow and the horizontal swing and vertical swing motions are alternated.

  • Page 83: Operation Starting Control

    Main Functions SiBE12-712C Operation Starting Control FTXG25-35E, CTXG50E, ATXG25-50E The system carries out the following control at the beginning to conduct every functional parts properly. 1. Opening the front panel fully 2. Output of the ∆ D signal after the front panel starts moving 3.

  • Page 84: Fan Speed Control For Indoor Units

    SiBE12-712C Main Functions 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 211.

  • Page 85: Programme Dry Function

    Main Functions SiBE12-712C Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow 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 86: Automatic Operation

    SiBE12-712C Main Functions Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote controller, 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 87: Thermostat Control

    Main Functions SiBE12-712C 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 88: Night Set Mode

    SiBE12-712C Main Functions 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 89: Econo Mode

    Main Functions SiBE12-712C ECONO Mode Outline FTK(X)S20-50D, ATKS20-35E, ATXS20-50E, FVXS25-50F Econo Mode is a function that sets a limit for power consumption. A maximum power consumption of 1000 W (40 class) or 1300W (50 class) is the limit for the 2MK(X)S40/50F. This mode is useful for preventing circuit breakers from being overloaded by the use of multiple air conditioners and other electrical devices.

  • Page 90: Intelligent Eye

    SiBE12-712C Main Functions 1.10 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 91 Main Functions SiBE12-712C 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 92: Home Leave Operation

    SiBE12-712C Main Functions 1.11 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 93: Inverter Powerful Operation

    Main Functions SiBE12-712C 1.12 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 temperature will be converted to the following states in a period of 20 minutes.

  • Page 94: Other Functions

    SiBE12-712C Main Functions 1.13 Other Functions 1.13.1 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 airflow is stopped or is made very weak thereby carrying out comfortable heating of the room.
  • Page 95 Main Functions SiBE12-712C 1.13.6 Air-Purifying Filter For FLK(X)S25-50B A double structure made up of a bacteriostatic filter and an Air-Purifying Filter traps dust, mildew, mites, tobacco smoke, and allergy-causing pollen. Replace the Air-Purifying Filter once every 3 months. 1.13.7 Air-Purifying Filter with Photocatalytic Deodorizing Function For FTK(X)S20-35C;...

  • Page 96: Function Of Thermistor

    SiBE12-712C Main Functions 1.14 Function of Thermistor 1.14.1 Heat Pump Model Expansion valve Four way valve (R7042) Compressor A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat Exchanger exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor...
  • Page 97 Main Functions SiBE12-712C Indoor Heat 1. The indoor heat exchanger thermistors are used for controlling target discharge temperature. The system sets a target discharge pipe temperature according to the outdoor and indoor Exchanger heat exchanger temperature, and controls the electronic expansion valve opening so that Thermistor the target discharge temperature can be obtained.
  • Page 98 SiBE12-712C Main Functions 1.14.2 Cooling Only Model Expansion valve Compressor (R4688) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat Exchanger exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor...

  • Page 99: Control Specification

    Control Specification SiBE12-712C 2. Control Specification Mode Hierarchy Outline There are two modes; the mode selected in user’s place (normal air conditioning mode) and forced operation mode for installation and providing service. Detail 1. For heat pump model There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)

  • Page 100: Frequency Control

    SiBE12-712C Control Specification Frequency Control Outline Frequency that corresponds to each room’s capacity will be determined according to the difference in the temperature of each room and the temperature that is set by the remote controller. The function is explained as follows. 1.
  • Page 101 Control Specification SiBE12-712C For Cooling Only Model 1. Determine command frequency Command frequency will be determined in the following order of priority. 1.1 Limiting frequency by drooping function Input current, discharge pipes, freeze prevention, dew prevention, fin thermistor temperature. 1.2 Indoor frequency command 2.
  • Page 102 SiBE12-712C Control Specification 3. Limit of frequency variation width When the difference between input current and input current drooping value is less than 1 A, the frequency increase width must be limited. 4. Frequency management when other controls are functioning When each frequency is drooping;...

  • Page 103: Controls At Mode Changing / Start-Up

    Control Specification SiBE12-712C Controls at Mode Changing / Start-up 2.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command from the indoor, the outdoor air temperature and discharge pipe temperature. Detail Preheating ON Condition When outdoor air temperature is below 10.5ºC and discharge pipe temperature is below 10.5ºC, inverter in open phase operation starts.
  • Page 104 SiBE12-712C Control Specification 2.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used when defrosting (only for heat pump model).) 40 class 50 class FCG 3 FCG 2 FCG 1...

  • Page 105: Discharge Pipe Temperature Control

    Control Specification SiBE12-712C Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the compressor's internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further. Detail Divide the Zone Keep...

  • Page 106: Freeze-Up Protection Control

    SiBE12-712C Control Specification Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...

  • Page 107: Fan Control

    Control Specification SiBE12-712C Fan Control Outline Fan control is carried out according to the following conditions. 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. ON/OFF control when cooling operation 5.

  • Page 108: Defrost Control

    SiBE12-712C Control Specification 2.10 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.

  • Page 109: Electronic Expansion Valve Control

    Control Specification SiBE12-712C 2.11 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Room Distribution Control 1.
  • Page 110 SiBE12-712C Control Specification Detail The followings are the examples of control which function in each mode by the electronic expansion valve control. Operation pattern : function × : not function When power is turned ON × × × × × ×...
  • Page 111 Control Specification SiBE12-712C 2.11.1 Fully Closing with Power On Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 2.11.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
  • Page 112 SiBE12-712C Control Specification Detail Detect Disconnection If a 780-second timer for open control becomes over, the following adjustment must be made. 1. When the operation mode is cooling When the discharge pipe temperature is lower than the outdoor heat exchanger temperature, the discharge pipe thermistor disconnection must be ascertained.

  • Page 113: Malfunctions

    Control Specification SiBE12-712C 2.12 Malfunctions 2.12.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Gas pipe thermistor 5.

  • Page 114: Forced Operation Mode

    SiBE12-712C Control Specification Detail Judgment by Input Current When an output frequency is exceeds 51 Hz (40 class) or 48 Hz (50 class) and the input current is less than specified value, the adjustment is made for insufficient gas. Judgment by Discharge Pipe Temperature When discharge pipe temperature is higher than 101°C, the electronic expansion value opening is 450 plus (max.) and the adjustment is made for insufficient gas.

  • Page 115: Additional Function

    Control Specification SiBE12-712C 2.14 Additional Function 2.14.1 POWERFUL Operation Mode Compressor operating frequency and outdoor unit airflow rate are increased. 2.14.2 Voltage Detection Function Power supply voltage is detected each time equipment operation starts. Function and Control...

  • Page 116: Part 5 Operation Manual

    SiBE12-712C Part 5 Operation Manual 1. System Configuration................106 1.1 Operation Instructions ................106 2. Instruction....................107 2.1 FTK(X)S, ATK(X)S, F(C)(A)TXG, FLK(X)S Series.......107 2.2 FVXS Series..................170 Operation Manual...

  • Page 117: System Configuration

    System Configuration SiBE12-712C 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 118: Instruction

    SiBE12-712C Instruction Instruction FTK(X)S, ATK(X)S, F(C)(A)TXG, FLK(X)S Series 2.1.1 Manual Contents and Reference Page Wall Mounted Type FTK(X)S20-50D FTXG25/35E Model Series FTK(X)S20-35C ATKS20-35E CTXG50E ATK(X)S20-35D ATXS20-50E ATXG25-50E Read Before Operation Safety Precautions Names of Parts 116★3 Preparation Before Operation ★1 Operation AUTO, DRY, COOL, HEAT, FAN Operation ★1...
  • Page 119 • 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 120: Installation Site

    SiBE12-712C Instruction • Do not place appliances which produce open fire in places exposed to the air flow from the unit or under the indoor unit. It may cause incomplete combustion or deformation of the unit due to the heat. •...
  • Page 121 Instruction SiBE12-712C 2.1.3 Names of Parts FTK(X)S 20-50 D, ATKS 20/25/35 E, ATXS 20-50 E Names of parts Indoor Unit ON/OFF Operation Manual...
  • Page 122 SiBE12-712C Instruction Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Titanium Apatite Photocatalytic Push once again to stop it. Air-Purifying Filter: • The operation mode refers to the following •...
  • Page 123 Instruction SiBE12-712C Remote Controller ECONO ON/OFF TEMP POWERFUL MODE SWING QUIET COMFORT SENSOR CANCEL TIMER < > ARC433B50, B43 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET • It sends signals to the indoor unit. operation. 2. Display: 9. FAN setting button: •...
  • Page 124 SiBE12-712C Instruction FTK(X)S 20/25/35 C, ATK(X)S 20/25/35 D Names of parts Indoor Unit Operation Manual...
  • Page 125 Instruction SiBE12-712C Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Air purifying filter with Push once again to stop it. photocatalytic deodorizing function: • The operation mode refers to the following •...
  • Page 126 SiBE12-712C Instruction Remote Controller < ARC433B1, B2 > 1. Signal transmitter: (AUTO/DRY/COOL/HEAT/FAN) • It sends signals to the indoor unit. 8. QUIET button: OUTDOOR UNIT QUIET operation 2. Display: 9. FAN setting button: • It displays the current settings. • It selects the air flow rate setting. (In this illustration, each section is shown with all 10.
  • Page 127 Instruction SiBE12-712C FTXG 25/35 E, CTXG 50 E, ATXG 25-50 E Names of parts Indoor Unit (With the panel closed) Operation Manual...
  • Page 128 SiBE12-712C Instruction Outdoor Unit Indoor Unit 1. Air filter • The operation mode refers to the following table. 2. Titanium Apatite Photocatalytic Tempera- Airflow Air-Purifying Filter : Mode ture setting rate • These filters are attached to the inside of F(C)TXG AUTO 25°C AUTO...
  • Page 129 Instruction SiBE12-712C Remote Controller < ARC433B41 > 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET operation • It sends signals to the indoor unit. 9. FAN setting button: 2. Display: • It selects the air flow rate setting. • It displays the current settings. 10.
  • Page 130 SiBE12-712C Instruction FDK(X)S 25-50 C, FDK(X)S 25/35 E Names of parts Indoor Unit Operation Manual...
  • Page 131 Instruction SiBE12-712C Outdoor Unit Indoor Unit 1. Air outlet 10. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Air outlet grille: (Field supply) Push once again to stop it. • Appearance of the Air outlet grille and Air inlet •...
  • Page 132 SiBE12-712C Instruction Remote Controller 〈 ARC433B69, B76 〉 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: 8. QUIET button: OUTDOOR UNIT QUIET • It displays the current settings. operation (In this illustration, each section is shown with all its displays ON for the purpose of...
  • Page 133 Instruction SiBE12-712C FLK(X)S 25-50 B Names of parts Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this man- ual show the case when installation is being carried out to the ceiling. (The methods of operation used are the same when installing to a wall.) Opening the front panel How to open the front panel...
  • Page 134 SiBE12-712C Instruction 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 again to stop it. 2. Air outlet •...
  • Page 135 Instruction SiBE12-712C Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING QUIET < > ARC433B67, B68 1. Signal transmitter: 7. MODE selector button: • It selects the operation mode. • It sends signals to the indoor unit. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: 8.
  • Page 136 SiBE12-712C Instruction 2.1.4 Preparation Before Operation Preparation Before Operation To set the batteries Position + and – correctly! 1. Slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries •...
  • Page 137 Instruction SiBE12-712C Preparation Before Operation To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote control- ler, such as a curtain, the unit will not operate. •...
  • Page 138 SiBE12-712C Instruction To set the clock 1. Press “CLOCK button”. 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 139 Instruction SiBE12-712C 2.1.5 AUTO·DRY·COOL·HEAT·FAN Operation 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 140 SiBE12-712C Instruction To change the airflow 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 141 Instruction SiBE12-712C 2.1.6 Adjusting the Airflow Direction FTK(X)S 20-50 D, ATKS 20/25/35 E, ATXS 20-50 E Adjusting the Airflow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. •...
  • Page 142 SiBE12-712C 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 143 Instruction SiBE12-712C FTK(X)S 20/25/35 C, ATK(X)S 20/25/35 D Adjusting the Airflow Direction 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.
  • Page 144 SiBE12-712C Instruction Operation Manual...
  • Page 145 Instruction SiBE12-712C FTXG 25/35 E, CTXG 50 E, ATXG 25-50 E Adjusting the Airflow Direction 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. 2.
  • Page 146 SiBE12-712C Instruction To start COMFORT AIRFLOW operation 5. Press “COMFORT AIRFLOW button”. • The flap orientation 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 147 Instruction SiBE12-712C FLK(X)S 25-50 B Adjusting the Airflow Direction 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.
  • Page 148 SiBE12-712C Instruction Operation Manual...
  • Page 149 Instruction SiBE12-712C 2.1.7 POWERFUL Operation 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 150 SiBE12-712C Instruction 2.1.8 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is conve- nient during night. To start OUTDOOR UNIT QUIET operation 1.
  • Page 151 Instruction SiBE12-712C 2.1.9 ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by lowering the maximum power con- sumption value. To start ECONO operation 1. Press “ECONO button” . • “ ” is displayed on the LCD. To cancel ECONO opera- tion 2.
  • Page 152 SiBE12-712C Instruction 2.1.10 HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and airflow rate settings. To start HOME LEAVE operation 1. Press “HOME LEAVE button” . • “ ”...
  • Page 153 Instruction SiBE12-712C Operation Manual...
  • Page 154 SiBE12-712C Instruction 2.1.11 INTELLIGENT EYE Operation FTK(X)S 20-50 D, ATKS 20/25/35 E, ATXS 20-50 E INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ”...
  • Page 155 Instruction SiBE12-712C INTELLIGENT EYE Operation “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 156 SiBE12-712C Instruction FTK(X)S 20/25/35 C, ATK(X)S 20/25/35 D INTELLIGENT EYE Operation “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 157 Instruction SiBE12-712C Operation Manual...
  • Page 158 SiBE12-712C Instruction FTXG 25/35 E, CTXG 50 E, ATXG 25-50 E INTELLIGENT EYE Operation “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...
  • Page 159 Instruction SiBE12-712C “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 160 SiBE12-712C Instruction 2.1.12 TIMER Operation 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 opera- tion •...
  • Page 161 Instruction SiBE12-712C Operation Manual...
  • Page 162 SiBE12-712C Instruction 2.1.13 Note for Multi System Note for Multi System << >> What is a “Multi System”? This system has one outdoor unit connected to multiple indoor units. room room room Outdoor unit Selecting the Operation Mode room room room Living Living...
  • Page 163 Instruction SiBE12-712C 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 164 SiBE12-712C Instruction 2.1.14 Care and Cleaning FTK(X)S 20-50 D, ATKS 20/25/35 E, ATXS 20-50 E Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1.
  • Page 165 Instruction SiBE12-712C 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 166 SiBE12-712C 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 there you bought the air conditioner.
  • Page 167 Instruction SiBE12-712C FTK(X)S 20/25/35 C, ATK(X)S 20/25/35 D Operation Manual...
  • Page 168 SiBE12-712C Instruction Operation Manual...
  • Page 169 Instruction SiBE12-712C 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 170 SiBE12-712C Instruction FTXG 25/35 E, CTXG 50 E, ATXG 25-50 E Care and Cleaning CAUTION • Before cleaning, be sure to stop the operation and turn the breaker OFF. • Always shut down the unit (and close the panel) before doing any work. Opening the panel during operation may cause the panel to fall off.
  • Page 171 Instruction SiBE12-712C Filters 1. Open the front panel. • Open the front panel by placing a finger on the panel tab on either side of the front panel and then secure it using the supporting plate on the right. 2. Pull out the air filters. •...
  • Page 172 SiBE12-712C 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 there you bought the air conditioner.
  • Page 173 Instruction SiBE12-712C FDK(X)S 25-50 C, FDK(X)S 25/35 E Care and Cleaning • Only a qualified service person is allowed to CAUTION 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 174 • The suction grille is option. • Do not use water or air of 50˚C or higher for cleaning air filters and outside panels. • Ask your DAIKIN dealer how to clean it. Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded.
  • Page 175 Instruction SiBE12-712C FLK(X)S 25-50 B Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front panel 1. Open the front panel. •...
  • Page 176 SiBE12-712C Instruction Filters 1. Open the front panel. 2. Pull out the air filters. • 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 177 Instruction SiBE12-712C 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 178 SiBE12-712C Instruction 2.1.15 Troubleshooting Trouble Shooting 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 179 Instruction SiBE12-712C Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Hasn’t a breaker turned OFF or a fuse blown? operate. • Isn’t it a power failure? (OPERATION lamp is off.) •...
  • Page 180 SiBE12-712C Instruction 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. Do not attempt to repair or modify the air conditioner by yourself.

  • Page 181: Fvxs Series

    • 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 182 SiBE12-712C Instruction • Do not block air inlets nor outlets. Impaired air flow may result in insufficient performance or trouble. • 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.
  • Page 183 Instruction SiBE12-712C 2.2.2 Names of Parts Names of parts Indoor Unit Opening the Front Panel How to open the front panel: Air outlet selection switch • This setting blows air from upper outlet only. This setting automatically decides a blow •...
  • Page 184 SiBE12-712C Instruction Outdoor Unit 25/35 class 50 class Indoor Unit 1. Titanium Apatite Photocatalytic • The operation mode refers to the following Air-Purifying Filter: table. • These filters are attached to the inside of Temperature Airflow Model Mode the air filters. setting rate 2.
  • Page 185 Instruction SiBE12-712C Remote Controller <Open the lid> <ARC452A1> 1. Signal transmitter: 9. ECONO button: • It sends signals to the indoor unit. ECONO operation 10. SWING button: 2. Display: • Adjusting the Airflow Direction • It displays the current settings. (In this illustration, each section is shown 11.
  • Page 186 SiBE12-712C Instruction 2.2.3 Preparation Before Operation Preparation Before Operation To set the batteries 1. Slide the front cover to take it off. Position + and – correctly! 2. Set two dry batteries (LR03·AAA). 3. Set the front cover as before. To operate the remote controller •...
  • Page 187 Instruction SiBE12-712C Preparation Before Operation To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “SELECT button” to set the current day of the week. 3. Press “CLOCK button”. blinks. 4. Press “SELECT button” to set the clock to the present time. Holding down “...
  • Page 188 SiBE12-712C Instruction Turn the breaker ON • Turning ON the breaker closes the flap. (This is a normal procedure.) Checks on Remote Controller Settings • This remote controller is common to the heat pump model and cooling only model. Use the dipswitches on the remote controller to set the heat pump model or cooling only model.
  • Page 189 Instruction SiBE12-712C 2.2.4 AUTO·DRY·COOL·HEAT·FAN Operation 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 190 SiBE12-712C Instruction To change the airflow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of airflow rate setting from “ ” to “ ” plus “ ” “ ” are available. The airflow rate setting is not variable.
  • Page 191 Instruction SiBE12-712C 2.2.5 Adjusting the Airflow Direction Adjusting the Airflow Direction You can adjust the airflow 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.
  • Page 192 SiBE12-712C Instruction Airflow selection • Make airflow selection according to what suits you. When setting the airflow selection switch to • Air conditioner automatically decides the appropriate blowing pattern depending on the operating mode/situation. Operating mode Situation Blowing pattern • When the room has become fully •...
  • Page 193 Instruction SiBE12-712C 2.2.6 POWERFUL Operation 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 20minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.
  • Page 194 SiBE12-712C Instruction 2.2.7 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET 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 QUIET operation 1.
  • Page 195 Instruction SiBE12-712C 2.2.8 ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances.
  • Page 196 SiBE12-712C Instruction 2.2.9 TIMER Operation 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 197 Instruction SiBE12-712C TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. (page 8.) 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “SELECT button” until the time setting reaches the point you like.
  • Page 198 SiBE12-712C Instruction 2.2.10 WEEKLY TIMER Operation WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week. It is convenient if the WEEKLY TIMER is set according to the family’s life style. Using in these cases of WEEKLY TIMER An example of WEEKLY TIMER settings is shown below.
  • Page 199 Instruction SiBE12-712C WEEKLY TIMER Operation To use WEEKLY TIMER operation • Make sure the day of the week and time are set. If not, set the day of the week and time. (page 8.) Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C...
  • Page 200 SiBE12-712C Instruction 8. Press “SELECT button” to select the desired temperature. • The temperature can be set between 10˚C and 32˚C. Cooling: The unit operates at 18˚C even if it is set at 10 to 17˚C. Heating: The unit operates at 30˚C even if it is set at 31 to 32˚C.
  • Page 201 Instruction SiBE12-712C WEEKLY TIMER Operation Using copy mode • A reservation made once can be easily copied and the same settings used for another day of the week. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C 6:00 8:30 17:30 22:00...
  • Page 202 SiBE12-712C Instruction Confirming a reservation • The reservation can be confirmed. 1. Press “ button”. • The day of the week and the reservation number of the current day will be displayed. 2. Press “SELECT button” to select the day of the week and the reservation number to be confirmed.
  • Page 203 Instruction SiBE12-712C 2.2.11 Care and Cleaning CARE Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front panel 1.
  • Page 204 SiBE12-712C Instruction Filters 1. Open the front panel. 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 Titanium Apatite Photocatalytic Air-Purifying Filter. •...
  • Page 205 Instruction SiBE12-712C 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 there you bought the air conditioner.
  • Page 206 SiBE12-712C Instruction 2.2.12 Troubleshooting Trouble Shooting 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 207 Instruction SiBE12-712C Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Hasn’t a breaker turned OFF or a fuse blown? operate. • Isn’t it a power failure? (OPERATION lamp is off.) •...
  • Page 208 SiBE12-712C Instruction 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. Do not attempt to repair or modify the air conditioner by yourself.
  • Page 209 Instruction SiBE12-712C Operation Manual...

  • Page 210: Part 6 Service Diagnosis

    SiBE12-712C Part 6 Service Diagnosis 1. Caution for Diagnosis................200 2. Problem Symptoms and Measures .............202 3. Service Check Function ..............203 3.1 Check Method 1 ...................203 3.2 Check Method 2 ...................205 4. Troubleshooting ..................207 4.1 Error Codes and Description ..............207 4.2 Indoor Unit PCB Abnormality ...............208 4.3 Freeze-up Protection Control or High Pressure Control.......209 4.4 Fan Motor or Related Abnormality ............211 4.5 Thermistor or Related Abnormality (Indoor Unit)........214...

  • Page 211: Caution For Diagnosis

    Caution for Diagnosis SiBE12-712C 1. Caution for Diagnosis The operation lamp flashes 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. 2.
  • Page 212 SiBE12-712C Caution for Diagnosis In case of FVXS 25-50 F Series OPERATION lamp (green) (R6843) 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 213: Problem Symptoms And Measures

    Problem Symptoms and Measures SiBE12-712C Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the Units Check the power supply. Check to make sure that the rated voltage is — Operates. supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...

  • Page 214: Service Check Function

    SiBE12-712C Service Check Function Service Check Function Check Method 1 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 ARC433 Series temperature display section.
  • Page 215 Service Check Function SiBE12-712C 1. When the timer cancel button is held down for 5 seconds, a “ 00 ” indication flashes on the ARC452 Series temperature display section. <Open the lid> TIMER CANCEL button < ARC452A1 > (R6757) 2. Press the timer cancel button repeatedly until a continuous beep is produced. The code indication changes in the sequence shown below, and notifies with a long beep.

  • Page 216: Check Method 2

    SiBE12-712C Service Check Function Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP▲,TEMP▼, MODE) simultaneously. (R4272) The digit of the number of tens blinks. ★ Try again from the start when the digit does not blink. (R4273) 2.
  • Page 217 Service Check Function SiBE12-712C 5. Press the TEMP button. Press TEMP▲ or TEMP▼ and change the digit until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. ★ “pi” : The both numbers of tens and units do not accord with the error code. ★...

  • Page 218: Troubleshooting

    SiBE12-712C Troubleshooting 4. Troubleshooting Error Codes and Description Reference Code Indication Description Page System Normal — U0★ Insufficient gas Over-voltage detection / low-voltage detection Outdoor unit PCB abnormality or signal transmission circuit abnormality Unspecified voltage (between indoor and outdoor units) Anti-icing function in other rooms Indoor Indoor unit PCB abnormality...

  • Page 219: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE12-712C Indoor Unit PCB Abnormality Remote Controller 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 Supposed Faulty indoor unit PCB Causes Faulty connector connection Troubleshooting...

  • Page 220: Freeze-Up Protection Control Or High Pressure Control

    SiBE12-712C Troubleshooting Freeze-up Protection Control or High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) 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 The freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
  • Page 221 Troubleshooting SiBE12-712C 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.248 Is there any short-circuit? Provide sufficient air passage. Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 222: Fan Motor Or Related Abnormality

    SiBE12-712C Troubleshooting Fan Motor or Related Abnormality 4.4.1 AC Motor Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction When the detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 223 Troubleshooting SiBE12-712C 4.4.2 DC Motor Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction When the detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 224 SiBE12-712C Troubleshooting 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 Refer to P.245 and rotate fan by hand. Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.

  • Page 225: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiBE12-712C Thermistor or Related Abnormality (Indoor Unit) Remote Controller 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 operation ∗...

  • Page 226: Front Panel Open / Close Fault

    SiBE12-712C Troubleshooting Front Panel Open / Close Fault Remote Controller Display Method of Malfunction Detection Malfunction The system will be shut down when the error occurs twice. Decision Conditions Supposed Malfunction of the reduction motor Causes Malfunction or deterioration of the front panel mechanism Malfunction of the limit switch Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...

  • Page 227: Freeze-Up Protection Control

    Troubleshooting SiBE12-712C Freeze-up Protection Control Remote Controller Display Method of Indoor unit icing, during cooling operation, is detected by checking the temperatures sensed by the indoor unit heat exchanger thermistor and room temperature thermistor that are located in a Malfunction shut-down room.
  • Page 228 SiBE12-712C Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.245 Check the wiring and piping. Check No.06 Wiring or piping out of Correct the wiring or piping Refer to P.248 spec? error.

  • Page 229: Ol Activation (Compressor Overload)

    Troubleshooting SiBE12-712C OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following Decision 60-minute compressor running time (total time).

  • Page 230: Compressor Lock

    SiBE12-712C Troubleshooting Compressor Lock Remote Controller Display Method of Judging from current waveform generated when high-frequency voltage is applied to the Malfunction compressor. Detection Malfunction The system will be shut down if the error occurs 16 times. Clearing condition: Continuous run for about 11 minutes (normal) Decision Conditions Supposed...

  • Page 231: Dc Fan Lock

    Troubleshooting SiBE12-712C 4.10 DC Fan Lock Remote Controller Display Method of A fan motor or related error is detected by checking the high-voltage fan motor rpm being Malfunction detected by the Hall Detection Malfunction The fan does not start in 60 seconds even when the fan motor is running. The system will be shut down if the error occurs 16 times.

  • Page 232: Input Over Current Detection

    SiBE12-712C Troubleshooting 4.11 Input Over Current Detection Remote Controller Display Method of An input over-current is detected by checking the power consumption value of outdoor unit with Malfunction the compressor running. Detection Malfunction The following input value (calculated from power consumption of outdoor unit) with the compressor running continues for 2.5 seconds.
  • Page 233 Troubleshooting SiBE12-712C Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and reconnected for part replacement, for example, and the system is interrupted by an input over-current, Refer to P.249 check the wires again.

  • Page 234: Discharge Pipe Temperature Control

    SiBE12-712C Troubleshooting 4.12 Discharge Pipe Temperature Control Remote Controller Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the Malfunction temperature being detected by the discharge pipe thermistor. Detection Malfunction If the temperature being detected by the discharge pipe thermistor rises, the compressor will stop.

  • Page 235: High Pressure Control In Cooling

    Troubleshooting SiBE12-712C 4.13 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the Malfunction temperature being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above 65°C.
  • Page 236 SiBE12-712C Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Check the installation space. Refer to P.245 Check No. 07 Check No.06 Abnormal Change the air outlet grille Check the installation Refer to P.248 condition.

  • Page 237: Compressor Sensor System Abnormality

    Troubleshooting SiBE12-712C 4.14 Compressor Sensor System Abnormality Remote Controller Display Method of Fault condition is identified by DC current which is detected before compressor startup. Malfunction Detection Malfunction When the DC current before compressor startup is other than 0.5 to 4.5 V (detected by converting the sensor output to voltage), or the DC voltage is 50 V or less.

  • Page 238: Position Sensor Abnormality

    SiBE12-712C Troubleshooting 4.15 Position Sensor Abnormality Remote Controller Display Method of A compressor startup failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection Malfunction The compressor is not running in about 15 seconds after the compressor run command signal is sent.
  • Page 239 Troubleshooting SiBE12-712C Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.08 Check the power supply Refer to P.250 Check No. 08 Check No.13 Check the discharge pressure. Refer to P.252 Abnormal Judgment...

  • Page 240: Dc Voltage / Dc Current Sensor Abnormality

    SiBE12-712C Troubleshooting 4.16 DC Voltage / DC Current Sensor Abnormality Remote Controller Display Method of DC voltage or DC current sensor system fault is identified based on the compressor operation Malfunction frequency and the input current detected by the product of DC current and DC voltage. Detection Malfunction When the compressor operation frequency is more than 52 Hz...

  • Page 241: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiBE12-712C 4.17 Thermistor or Related Abnormality (Outdoor Unit) P4 , J3 , J6 , J8 , J9 , H9 Remote Controller Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction [A thermistor error is detected by checking the temperature.] Detection...
  • Page 242 SiBE12-712C Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Turn on the power again. Refer to P.248 Error displayed Reconnect. again on remote controller? Connector or thermistor Reconnect.

  • Page 243: Electrical Box Temperature Rise

    Troubleshooting SiBE12-712C 4.18 Electrical Box Temperature Rise Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection Malfunction With the compressor off, the radiation fin temperature is above 80°C. The error is cleared when the temperature drops below 70°C.
  • Page 244 SiBE12-712C Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 (Precaution before turning on the power again) Refer to P.248 Make sure the power has been off for at least 30 seconds. WARNING Turn off the power and turn it on again.

  • Page 245: Radiation Fin Temperature Rise

    Troubleshooting SiBE12-712C 4.19 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor on. Detection Malfunction If the radiation fin temperature with the compressor on is above 93°C, If a radiation fin temperature rise takes place 255 times successively, the system will be shut Decision down.
  • Page 246 SiBE12-712C Troubleshooting Troubleshooting Be sure to turn off power switch before WARNING Caution connect or disconnect connector, or Check No.06 To cool down the electricals, the parts damage may be occurred. outdoor unit fan gets started when Refer to P.248 (Precaution before turning on the power again) the radiation fin temperature rises above 75˚C even when the air...

  • Page 247: Output Over Current Detection

    Troubleshooting SiBE12-712C 4.20 Output Over Current Detection Remote Controller Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
  • Page 248 SiBE12-712C Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and Check No.07 reconnected for part replacement, for example, and the system is interrupted by an input over-current, check the wires again.

  • Page 249: Insufficient Gas

    Troubleshooting SiBE12-712C 4.21 Insufficient Gas Remote Controller Display Method of Gas shortage detection I : Malfunction A gas shortage is detected by checking the power consumption value and the compressor running frequency. Detection Malfunction Gas shortage detection I : Power consumption < 4578 / 256 (W/Hz) × Compressor running frequency – 638 (W) Decision However, when the status of running frequency >...
  • Page 250 SiBE12-712C Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.245 Any thermistor Replace in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor air thermistor...

  • Page 251: Over-Voltage Detection / Low-Voltage Detection

    Troubleshooting SiBE12-712C 4.22 Over-voltage Detection / Low-voltage Detection Remote Controller Display Method of An abnormal voltage rise (or drop) is detected by checking the detection circuit or DC voltage Malfunction detection circuit. Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or the voltage being detected by the DC voltage detection circuit is judged to be below 150V for Decision 0.1 second.

  • Page 252: Anti-Icing Function In Other Rooms / Unspecified Voltage (Between Indoor And Outdoor Units)

    SiBE12-712C Troubleshooting 4.23 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units) UA , UH Remote Controller Display Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the microcomputer.

  • Page 253: Outdoor Unit Pcb Abnormality Or Signal Transmission Circuit Abnormality

    Troubleshooting SiBE12-712C 4.24 Outdoor Unit PCB Abnormality or Signal Transmission Circuit Abnormality Remote Controller Display Method of 1. Detect within the programme of the microcomputer that the programme is operating normally. Malfunction 2. When indoor-outdoor unit signal transmission can not be performed for more than 15 sec. Detection 3.
  • Page 254 SiBE12-712C Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check indoor unit also, because a comunication circuit fault may be caused by the problem related to the indoor unit. Check supply voltage Rectify the power supply.
  • Page 255 Troubleshooting SiBE12-712C Continued from the previous page Check No.10 Refer to P.250 Check grounding Does LED A turn off? Grounded? Carry out grounding work. The cause seems to be an Check No. 10 external factor other than Check the power supply failure of the outdoor unit waveform.

  • Page 256: Check

    SiBE12-712C Check 5. Check How to Check 5.1.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.
  • Page 257 Check SiBE12-712C Valve Body Condition (Symptom) Check Method / Measure (1) Valve body catches at fully opened or half Reset power supply and conduct cooling opened position. operation unit by unit. (Symptom) Cooling: Check the liquid pipe temperature Water leakage at the no-operation unit of no-operation unit.
  • Page 258 SiBE12-712C Check 5.1.4 Four Way Valve Performance Check Check No.05 Turn off the power and turn it on again. ∗ Four way valve coil Start the heating-mode run. Cooling / dry : No continuity Heating : Continuity voltage at DC 220- Replace the outdoor unit 240 V with compressor PCB.

  • Page 259: Thermistor Resistance Check

    Check SiBE12-712C 5.1.5 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 260: Installation Condition Check

    SiBE12-712C Check 5.1.6 Installation Condition Check Check No.07 Installation condition check Check the Abnormal allowable dimensions Change the position of the air of the air suction and discharge grille or the discharge area. installation location. Normal Does the discharged air from other outdoor unit cause an Change the position of the air increase of the suction...

  • Page 261: Discharge Pressure Check

    Check SiBE12-712C 5.1.7 Discharge Pressure Check Check No.08 Discharge pressure check High Replace the compressor. Is the stop valve open? Open the stop valve. Is the connection pipe Replace the pipe installed at deformed? the site. Dirty Are the heat exchanger Clean.
  • Page 262 SiBE12-712C Check 5.1.10 Inverter Units Refrigerant System Check Check No.11 Refrigerant system check the discharge thermistor disconnected Correct the problem. from the holder? Is the temperature of the four way valve suction Four way valve defective. pipe abnormaly Replace the four way valve. high? Check for gas leaks.

  • Page 263: Power Transistor Check

    Check SiBE12-712C 5.1.12 Power Transistor Check Check No.13 Checking the power transistor Never touch any live parts for at least 10 minutes after turning off the circuit breaker. If unavoidably necessary to touch a live part, make sure the power transistor's supply voltage is below 50 V using the tester.
  • Page 264 SiBE12-712C Check 5.1.14 Turning Speed Pulse Input on the Outdoor Unit PCB Check Check No.15 <Propeller fan motor> Make sure the voltage of 270±30V is being applied. (1) Stop the operation first and then the power, and disconnect the connector S70. (2) Make sure there is about DC 270 V between pins 4 and 7.
  • Page 265 Check SiBE12-712C Service Diagnosis...

  • Page 266: Part 7 Removal Procedure

    SiBE12-712C Part 7 Removal Procedure 1. Outdoor Unit..................256 1.1 Removal of the Panels and Plates ............256 1.2 Removal of the Electrical Box ..............258 1.3 Removal of the PCB................263 1.4 Removal of the Sound Blanket.............268 1.5 Removal of the Propeller Fan / Fan Motor ...........270 1.6 Removal of the Thermistors ..............273 1.7 Removal of the Compressor..............275 1.8 Removal of the Four Way Valve / Electronic Expansion Valve ....277...

  • Page 267: Outdoor Unit

    Outdoor Unit SiBE12-712C 1. Outdoor Unit Removal of the Panels and Plates Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points External appearance. Handle Manufacturer's label (R7570) φ6.4 Flare connection...
  • Page 268 SiBE12-712C Outdoor Unit Step Procedure Points Loosen the 4 screws When reassembling, make and remove the sure to fit the 4 hooks. discharge grille. (R7700) Loosen the 2 screws of The stop valve cover is the stop valve cover united with the shelter. and remove it.

  • Page 269: Removal Of The Electrical Box

    Outdoor Unit SiBE12-712C Removal of the Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Disconnect the Fasten the wires with screws connecting wires on the terminal board.
  • Page 270 SiBE12-712C Outdoor Unit Step Procedure Points Disconnect the For removal procedure of the connector for the fan lead wire for the fan motor, [S70] motor [S70]. refer to “Removal of the PCB”. (R7578) Detach the lead wire for the fan motor. (R7579) Disconnect the [S91] : Gas pipe thermistor...
  • Page 271 Outdoor Unit SiBE12-712C Step Procedure Points Disconnect the [S20] : Electronic expansion connectors [S20], [S21] valve EVA [S20] [S21] [S80] and [S80]. [S21] : Electronic expansion valve EVB [S80] : Four way valve (R7582) Undo the wire clip from The clip is push-mount type. the electrical box.
  • Page 272 SiBE12-712C Outdoor Unit Step Procedure Points Detach the discharge Meet the edge of the pipe thermistor. thermistor and the clip. Be careful not to lose the clip Clip for discharge pipe for the discharge pipe thermistor thermistor. Discharge pipe thermistor (R7586) Disconnect the [S90] : Thermistor ASSY...
  • Page 273 Outdoor Unit SiBE12-712C Step Procedure Points Loosen the screw in front of the electrical box. (R7590) Lift up the electrical box to remove. (R7591) Removal Procedure...

  • Page 274: Removal Of The Pcb

    SiBE12-712C Outdoor Unit Removal of the PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels Preparation Electrical box (cover) and plates such as the top Remove the electrical box plate and the front panel.
  • Page 275 Outdoor Unit SiBE12-712C Step Procedure Points Loosen the 2 screws Temperature fuse harness and detach the 1 clip to remove the radiation shield plate. Radiation shield plate (2) (R7600) Compressor harness Clip Hole (R7596) The clip is push mount type. (R7601) Cut off the clamp and disconnect the wire...
  • Page 276 SiBE12-712C Outdoor Unit Step Procedure Points Loosen the 7 screws in total to remove the PCB. (R7598) (R7602) Lift up the back side Make sure that the hooks of slightly and undo the the electrical box are placed hooks of the front. on the PCB.
  • Page 277 Outdoor Unit SiBE12-712C Step Procedure Points (R7605) Lift up the control PCB to remove. (R7606) Detach the faston See page 66 for detail. terminals from the [S70] [S40] [S92] [S91] [S20] [S21] temperature fuse and [S90] [S80] each terminal board. (R7607) [S20] : Electronic expansion valve EVA...
  • Page 278 SiBE12-712C Outdoor Unit Step Procedure Points Loosen the 2 screws of the radiation fin. (R7608) (R7609) Removal Procedure...

  • Page 279: Removal Of The Sound Blanket

    Outdoor Unit SiBE12-712C Removal of the Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electrical box 1. Remove the right side panel Loosen the 6 screws to remove the right side panel.
  • Page 280 SiBE12-712C Outdoor Unit Step Procedure Points 3. Remove the sound blanket Undo the fixing strings, open the sound blanket (body) and pull it out. (R7613) Lift up the sound Since the piping ports are blanket (top-upper) to torn easily, remove the remove.

  • Page 281: Removal Of The Propeller Fan / Fan Motor

    Outdoor Unit SiBE12-712C Removal of the Propeller Fan Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the propeller fan Loosen the washer fitted nut (M10) by an open-ended spanner to remove the propeller...
  • Page 282 SiBE12-712C Outdoor Unit Step Procedure Points The figure shows the arrangement of the fan motor lead wire. (R7622) Loosen the 1 screw to When assembling, make remove the fan motor sure mark of the fan motor fixing plate. goes down. (R7623) (R7624) Take out the fan motor...
  • Page 283 Outdoor Unit SiBE12-712C Step Procedure Points Turn the fun motor fixing plate backward and undo the 2 fixing hooks of the lead wire. (R7626) Release the fan motor When assembling, put the lead wire. lead wire through the back of the motor (so as not to be entangled with the propeller fan).

  • Page 284: Removal Of The Thermistors

    SiBE12-712C Outdoor Unit Removal of the Thermistors Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the assembly of Be careful not to lose the clip thermistor for the discharge pipe thermistor.
  • Page 285 Outdoor Unit SiBE12-712C Step Procedure Points Cut off the clamp. (R7634) Open the putty and remove the each Thermistor (Liquid) thermistor. Room A [S91] : Gas pipe Thermistor (Gas) thermistor Room A Room A (Black) Room B (Gray) [S92] : Liquid pipe thermistor Room A (Black) Room B (Gray)

  • Page 286: Removal Of The Compressor

    SiBE12-712C Outdoor Unit Removal of the Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal Be careful so as not to burn Terminal cover cover.
  • Page 287 Outdoor Unit SiBE12-712C Step Procedure Points There is a nut fixing the compressor. Warning Remove the nut with an Since it may happen that open-end spanner. refrigeration oil in the compressor will catch fire, prepare wet cloth so as to extinguish fire immediately.

  • Page 288: Removal Of The Four Way Valve / Electronic Expansion Valve

    SiBE12-712C Outdoor Unit Removal of the Four Way Valve Electronic Expansion Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the sound blanket. Warning Be careful about the four way 1.
  • Page 289 Outdoor Unit SiBE12-712C Step Procedure Points Before working, make Reassembling precautions sure that the refrigerant is 1. Use non-oxidizing brazing empty in the circuit. method. If nitrogen gas is not Be sure to apply nitrogen available, braze the parts replacement when speedily.

  • Page 290: Part 8 Others

    SiBE12-712C Part 8 Others 1. Others ....................280 1.1 Test Run from the Remote Controller ..........280 1.2 Jumper Settings ...................281 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................283 Others...

  • Page 291: Others

    Others SiBE12-712C 1. Others Test Run from the Remote Controller For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature. Trial operation may be disabled in either mode depending on the room temperature. After trial operation is complete, set the temperature to a normal level.

  • Page 292: Jumper Settings

    SiBE12-712C Others Jumper Settings 1.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the front panel.
  • Page 293 Others SiBE12-712C 1.2.3 Adjusting the Angle of the INTELLIGENT EYE Sensor FTK(X)S20-35C, ATK(X)S20-35D Only 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° to right and left of center) Gently push and slide the sensor to adjust the angle.

  • Page 294: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    SiBE12-712C Others Application of Silicon Grease to a Power Transistor Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board of an outdoor unit is replaced, it is required that silicon grease (*1) is certainly applied to the heat radiation part (the contact point to the heat radiation fin) of the power transistor and diode bridge.
  • Page 295 Others SiBE12-712C Others...

  • Page 296: Part 9 Appendix

    SiBE12-712C Part 9 Appendix 1. Piping Diagrams..................286 1.1 Indoor Units ..................286 1.2 Outdoor Units ..................290 2. Wiring Diagrams..................292 2.1 Indoor Units ..................292 2.2 Outdoor Units ..................296 Appendix...

  • Page 297: Piping Diagrams

    Piping Diagrams SiBE12-712C Piping Diagrams Indoor Units 1.1.1 Wall Mounted Type FTKS20/25/35D3VMW(L), ATKS20/25/35E2V1B FTKS50D2V1W(L) INDOOR UNIT MUFFLER ASSY HEAT EXCHANGER INDOOR UNIT 7.0CuT 6.4CuT MAFFLER ASSY HEAT EXCHANGER 7.0CuT 6.4CuT THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT CROSS FLOW FAN FIELD PIPING...
  • Page 298 SiBE12-712C Piping Diagrams CTXG50EV1BW(S), ATXG50EV1B FTXS20/25/35D3VMW(L), ATXS20/25/35E2V1B, ATXS25/35EV1B7 INDOOR UNIT HEAT EXCHANGER INDOOR UNIT 7.0CuT MAFFLER ASSY HEAT EXCHANGER 7.0CuT 7.0CuT 6.4CuT THERMISTOR 7.0CuT ON HEAT EXCH 7.0CuT THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT CROSS FLOW FAN FIELD PIPING (6.4CuT) CROSS FLOW FAN FIELD PIPING FAN MOTOR...
  • Page 299 Piping Diagrams SiBE12-712C 1.1.2 Duct Connected Type FDK(X)S25/35CAVMB, FDK(X)S50CVMB, FDK(X)S25/35EAVMB INDOOR UNIT ( 6.4CuT ) HEAT EXCHANGER THERMISTOR ON HEAT FIELD PIPING ( 6.4CuT ) EXCH. SIROCCO FAN FAN MOTOR FIELD PIPING CuT ) CuT ) REFRIGERANT FLOW CDXS25CVMB CDXS50CVMB CDKS25CVMB CDKS50CVMB COOLING...
  • Page 300 SiBE12-712C Piping Diagrams FLXS25/35BAVMB FLXS50BAVMB INDOOR UNIT INDOOR UNIT ( 6.4CuT ) ( 9.5CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT FIELD PIPING ON HEAT FIELD PIPING EXCH. ( 6.4CuT ) ( 6.4CuT ) EXCH. SIROCCO FAN SIROCCO FAN FAN MOTOR FAN MOTOR ( 9.5CuT )

  • Page 301: Outdoor Units

    Piping Diagrams SiBE12-712C Outdoor Units 2MKS40FV1B, 2AMK40FV1B OUTDOOR UNIT OUTDOOR TEMPERATURE MUFFLER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR LIQUID LINE BRANCH WITH HEAT EXCHANGER THERMISTOR MUFFLER PIPE STOP VALVE 7.0CuT FILTER 6.4CuT 6.4CuT 6.4CuT 6.4CuT ROOM A (6.4 CuT) 7.0CuT BRANCH 6.4CuT FIELD...
  • Page 302 SiBE12-712C Piping Diagrams 2MXS40FV1B, 2AMX40FV1B, 2AMX40F2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE MUFFLER MOTOR OPERATED VALVE THERMISTOR LIQUID PIPE LIQUID LINE WITH BRANCH HEAT EXCHANGER THERMISTOR FILTER MUFFLER STOP VALVE PIPE 7.0CuT 6.4CuT 6.4CuT 6.4CuT 6.4CuT ROOM A 7.0CuT (6.4 CuT) BRANCH 6.4CuT PIPE FIELD...

  • Page 303: Wiring Diagrams

    Wiring Diagrams SiBE12-712C Wiring Diagrams Indoor Units 2.1.1 Wall Mounted Type FTK(X)S20/25/35D3VMW(L), ATK(X)S20/25/35E2V1B, ATXS25/35EV1B7 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.
  • Page 304 SiBE12-712C Wiring Diagrams FTK(X)S20/25/35CAVMB, ATK(X)S20/25/35DAVMB PCB3 S36 S35 PCB1 → INTELLIGENT- EYE SENSOR 3.15A outdoor TERMINAL FOR PCB2 CENTRALIZED CONTROL FIELD WIRING. TRANSMISSION LED1 LED2 LED3 CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS t°...
  • Page 305 Wiring Diagrams SiBE12-712C 2.1.2 Duct Connected Type FDK(X)S25/35CAVMB, FDK(X)S50CVMB, FDK(X)S25/35EAVMB PCB1 PCB2 V1TR outdoor 3.15A 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 306 SiBE12-712C Wiring Diagrams 2.1.4 Floor Standing Type FVXS25/35/50FV1B PCB3 PCB2 → RECTIFIER S2W(4) 3.15A outdoor GRN/YLW FIELD WIRING. WIRELESS TRANSMISSION REMOTE CAUTION CIRCUIT CONTROLLER NOTE THAT OPERATION WILL PCB4 RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS RECEIVER TURNED OFF AND THEN BACK ON AGAIN.

  • Page 307: Outdoor Units

    Wiring Diagrams SiBE12-712C Outdoor Units 2MKS40FV1B, 2AMK40FV1B indoor PCB1 C100 MRM20 IPM1 ROOM A MRM10 ROOM B 3.15A 3.15A 1C11 MRCW S92 RED S91WHT S20 WHT S21 RED POWER SUPPLY 102°C t° t° t° t° t° t° t° (ROOM-A) (ROOM-A) (OUTDOOR) (DISCHARGE) X11A...
  • Page 308 SiBE12-712C Wiring Diagrams 2MXS40FV1B, 2AMX40FV1B, 2AMX40F2V1B indoor PCB1 C100 MRM20 IPM1 ROOM A MRM10 3.15A ROOM B 3.15A 1C11 MRCW S92 RED S91WHT S20 WHT S21 RED POWER SUPPLY 102°C t° t° t° t° t° t° t° (ROOM-A) (ROOM-A) (OUTDOOR) (DISCHARGE) X11A (ROOM-A)
  • Page 309 Wiring Diagrams SiBE12-712C Appendix...

  • Page 310: Index

    SiBE12-712C Index Numerics check No.05 ............247 check No.06 ............248 00 .................207 check No.07 ............249 3-D airflow ..............71 check No.08 ............250 3-minute standby ............92 check No.09 ............250 check No.10 ............250 check No.11 ............251 A1 .................208 check No.12 ............
  • Page 311 SiBE12-712C E5 ..............218 FU3 ............... 65 E6 ..............219 function of thermistor E7 ..............220 cooling only model .......... 87 E8 ..............221 heat pump model ..........85 F3 ..............223 functions ..............2 F6 ..............224 fuse ........52, 54, 56, 58, 60, 63, 65 H0 ..............226 H6 ..............227 H8 ..............229...
  • Page 312 SiBE12-712C limit switch ............56, 215 sensor PCB ............. 64 limit switch continuity check .........245 service PCB ............ 64 liquid compression protection function 2 ....96 signal receiver PCB ...... 53, 55, 57, 62 liquid pipe thermistor ........86, 231 printed circuit board connector wiring diagram ..52 low-voltage detection ...........240 problem symptoms and measures ......
  • Page 313 SiBE12-712C SW1 ..........52, 56, 58, 60, 63 SW2 ..............60, 63 SW4 ...............63 SW7 ...............54 target discharge pipe temperature control ...101 test run ..............280 thermistor discharge pipe thermistor ..85, 87, 100, 231 gas pipe thermistor ......85, 87, 231 indoor heat exchanger thermistor ..86, 87, 214 liquid pipe thermistor .......86, 231 outdoor heat exchanger thermistor ..85, 87, 231 outdoor temperature thermistor .....231...
  • Page 314 SiBE12-712C Drawings & Flow Charts Numerics 3-D airflow ..............71 fan motor connector output check ....... 245 fan motor or related abnormality AC motor ............211 adjusting the angle of the INTELLIGENT EYE sensor DC motor ............212 ..............282 four way valve performance check ...... 247 anti-icing function in other rooms ......241 freeze-up protection control ......
  • Page 315 SiBE12-712C outdoor unit PCB abnormality ......242 output over current detection .......236 target discharge pipe temperature control ..101 over-voltage detection / low-voltage detection ..240 thermistor or related abnormality (indoor unit) ..214 thermistor or related abnormality (outdoor unit) .. 230 thermistor resistance check ........
  • Page 316 Specifications, designs and other content appearing in this brochure are current as of April 2008 but subject to change without notice. SiBE 12-712C Printed in Japan 04/2008 B AK...

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