Daikin 3MKS50E3V1B Service Manual
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Daikin 3MKS50E3V1B Service Manual

Super multi nx e / f / g / k-series
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Table of Contents

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See also: Installation Manual
Service
Manual
E / F / G / K-Series
[Applied Models]
Inverter Multi : Cooling Only
Inverter Multi : Heat Pump
SiBE121135

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Summary of Contents for Daikin 3MKS50E3V1B

  • Page 1 SiBE121135 Service Manual E / F / G / K-Series [Applied Models] Inverter Multi : Cooling Only Inverter Multi : Heat Pump...
  • Page 2 SiBE121135 SUPER MULTI NX E-Series F-Series G-Series K-Series Cooling Only Outdoor Unit 3MKS50E3V1B 4MKS58E3V1B 4MKS75F2V1B 5MKS90E2V3B Indoor Unit FTXS25J2V1B FFQ25B9V1B FHQ35BWV1B FDBQ25B8V1 FTXS35J2V1B FFQ35B9V1B FHQ50BWV1B FBQ35C8VEB FTXS42J2V1B FFQ50B9V1B FHQ60BWV1B FBQ50C8VEB FTXS50J2V1B FFQ60B9V1B FBQ60C8VEB FTXS60GV1B FTXS71GV1B Heat Pump Outdoor Unit 3MXS40K2V1B...

  • Page 3: Table Of Contents

    SiBE121135 1. Introduction ................... vii 1.1 Safety Cautions ..................vii 1.2 Used Icons ....................xi Part 1 List of Functions ..............1 1. Cooling Only....................2 1.1 Outdoor Unit .....................2 1.2 Indoor Unit....................3 2. Heat Pump ....................6 2.1 Outdoor Unit .....................6 2.2 Indoor Unit....................7 Part 2 Specifications ..............
  • Page 4 SiBE121135 1.8 Automatic Operation................86 1.9 Thermostat Control.................87 1.10 NIGHT SET Mode ..................89 1.11 ECONO Operation .................90 1.12 HOME LEAVE Operation ...............91 1.13 INTELLIGENT EYE Operation ...............92 1.14 2-Area INTELLIGENT EYE Operation ...........93 1.15 Inverter POWERFUL Operation .............95 1.16 Multi-Colored Indicator Lamp / TIMER Lamp .........95 1.17 Other Functions..................97 2.
  • Page 5 SiBE121135 4.1 RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series..................267 4.2 SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series .....267 4.3 Sub Codes for SA Indoor Unit ..............268 4.4 Outdoor Unit ..................269 5. Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series ................270 5.1 Indoor Unit PCB Abnormality ...............270 5.2 Freeze-up Protection Control or Heating Peak-cut Control....272...
  • Page 6 SiBE121135 8. Check ....................325 8.1 Thermistor Resistance Check ..............325 8.2 Fan Motor Connector Check ..............326 8.3 Hall IC Check ..................327 8.4 Indoor Electronic Expansion Valve Coil Check ........327 8.5 Power Supply Waveform Check............328 8.6 Outdoor Electronic Expansion Valve Check.........329 8.7 Four Way Valve Performance Check ...........330 8.8 Inverter Unit Refrigerant System Check..........330 8.9 “Inverter Checker”...
  • Page 7 SiBE121135 6. Application of Silicon Grease to a Power Transistor and a Diode Bridge ................423 Part 9 Appendix................. 424 1. Piping Diagrams..................425 1.1 Outdoor Unit ..................425 1.2 Indoor Unit....................430 2. Wiring Diagrams..................437 2.1 Outdoor Unit ..................437 2.2 Indoor Unit....................442 Table of Contents...

  • Page 8: Introduction

    Introduction SiBE121135 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. Warnings The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 9 SiBE121135 Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident. In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant.
  • Page 10 Introduction SiBE121135 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 11 SiBE121135 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 12: Used Icons

    Introduction SiBE121135 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 13: Part 1 List Of Functions

    SiBE121135 Part 1 List of Functions 1. Cooling Only....................2 1.1 Outdoor Unit .....................2 1.2 Indoor Unit....................3 2. Heat Pump ....................6 2.1 Outdoor Unit .....................6 2.2 Indoor Unit....................7 List of Functions...

  • Page 14: Cooling Only

    Cooling Only SiBE121135 1. Cooling Only Outdoor Unit Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — Operation Limit for Heating (°CWB) —...

  • Page 15: Indoor Unit

    SiBE121135 Cooling Only Indoor Unit 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) —...
  • Page 16 Cooling Only SiBE121135 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) — Air-Purifying Filter with Photocatalytic —...
  • Page 17 SiBE121135 Cooling Only 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) — — Air-Purifying Filter with Photocatalytic —...

  • Page 18: Heat Pump

    Heat Pump SiBE121135 2. Heat Pump Outdoor Unit 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 –...

  • Page 19: Indoor Unit

    SiBE121135 Heat Pump Indoor Unit 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 20 Heat Pump SiBE121135 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 21 SiBE121135 Heat Pump 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 Heat Pump SiBE121135 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 SiBE121135 Heat Pump 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 24 Heat Pump SiBE121135 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 25 SiBE121135 Heat Pump 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 26: Part 2 Specifications

    SiBE121135 Part 2 Specifications 1. Cooling Only..................15 1.1 Outdoor Unit ...................15 1.2 Indoor Unit....................17 2. Heat Pump ....................22 2.1 Outdoor Unit ...................22 2.2 Indoor Unit....................25 Specifications...

  • Page 27: Cooling Only

    SiBE121135 Cooling Only 1. Cooling Only Outdoor Unit 50 Hz, 230 V Model 3MKS50E3V1B 4MKS58E3V1B Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD 2YC36BXD Motor Output 1,100 1,100 Model FVC50K...

  • Page 28: Specifications

    Cooling Only SiBE121135 50 Hz, 230 V Model 4MKS75F2V1B 5MKS90E2V3B Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45DXD 2YC63BXD Motor Output 1,380 1,920 Model FVC50K FVC50K Refrigerant Oil Charge 0.65 0.75 Type R-410A...

  • Page 29: Indoor Unit

    SiBE121135 Cooling Only Indoor Unit Wall Mounted Type 50 Hz, 220 - 230 - 240 V Model FTXS25J2V1B FTXS35J2V1B Rated Capacity 2.5 kW Class 3.5 kW Class Front Panel Color White White 10.8 (381) 11.4 (403) 7.9 (279) 8.7 (307) m³/min Airflow Rate (cfm)
  • Page 30 Cooling Only SiBE121135 50 Hz, 220 - 230 - 240 V Model FTXS60GV1B FTXS71GV1B Rated Capacity 6.0 kW Class 7.1 kW Class Front Panel Color White White 16.0 (565) 17.2 (607) 13.5 (477) 14.5 (512) m³/min Airflow Rate (cfm) 11.3 (399) 11.5 (406) 10.1 (357) 10.5 (371)

  • Page 31: Ceiling Mounted Cassette Type

    SiBE121135 Cooling Only Ceiling Mounted Cassette Type 50 Hz, 230 V Model FFQ25B9V1B FFQ35B9V1B Rated Capacity 2.5 kW Class 3.5 kW Class Model BYFQ60B8W1 BYFQ60B8W1 Color White White Decoration Panel Dimensions (H × W × D) 55 × 700 × 700 55 ×...

  • Page 32: Ceiling Suspended Type

    Cooling Only SiBE121135 Ceiling Suspended Type 50 Hz, 220 - 230 - 240 V Model FHQ35BWV1B FHQ50BWV1B Rated Capacity 3.5 kW Class 5.0 kW Class Panel Color White White 13.0 (459) 13.0 (459) Airflow Rate m³/min 10.0 (353) 10.0 (353) Type Sirocco Fan Sirocco Fan...
  • Page 33 SiBE121135 Cooling Only Ceiling Mounted Built-in Type 50 Hz, 220 - 230 - 240 V / 50 Hz, 230 V 60 Hz, 220 V Model FDBQ25B8V1 FBQ35C8VEB Rated Capacity 2.5 kW Class 3.5 kW Class Model — BYBS45DJW1 Color — White Decoration Panel...

  • Page 34: Heat Pump

    Heat Pump SiBE121135 2. Heat Pump Outdoor Unit 50 Hz, 230 V 3MXS40K2V1B 3MXS52E3V1B Model Cooling Heating Cooling Heating Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD 2YC36BXD Motor Output 1,100 1,100 Model...
  • Page 35 SiBE121135 Heat Pump 50 Hz, 230 V 3MXS68G2V1B 4MXS68F2V1B Model Cooling Heating Cooling Heating Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45DXD 2YC45DXD Motor Output 1,380 1,380 Model FVC50K FVC50K Refrigerant Oil Charge 0.65...
  • Page 36 Heat Pump SiBE121135 50 Hz, 230 V 4MXS80E2V3B 5MXS90E2V3B Model Cooling Heating Cooling Heating Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC63BXD 2YC63BXD Motor Output 1,920 1,920 Model FVC50K FVC50K Refrigerant Oil Charge 0.75...

  • Page 37: Indoor Unit

    SiBE121135 Heat Pump Indoor Unit Wall Mounted Type 50 Hz, 220 - 230 - 240 V FTXG25JV1BW FTXG25JV1BA Model Cooling Heating Cooling Heating Rated Capacity 2.5 kW Class 2.5 kW Class Front Panel Color White Silver 8.8 (311) 9.6 (339) 8.8 (311) 9.6 (339) 6.8 (240)
  • Page 38 Heat Pump SiBE121135 50 Hz, 220 - 230 - 240 V FTXG50JV1BW FTXG50JV1BA Model Cooling Heating Cooling Heating Rated Capacity 5.0 kW Class 5.0 kW Class Front Panel Color White Silver 10.3 (364) 11.4 (402) 10.3 (364) 11.4 (402) 8.5 (300) 9.8 (346) 8.5 (300) 9.8 (346)
  • Page 39 SiBE121135 Heat Pump 50 Hz, 220 - 230 - 240 V FTXS25K2V1B CTXS35K2V1B Model Cooling Heating Cooling Heating Rated Capacity 2.5 kW Class 3.5 kW Class Front Panel Color White White 9.1 (321) 10.0 (353) 9.2 (325) 10.1 (357) 7.0 (247) 8.0 (282) 7.2 (254) 8.1 (286)
  • Page 40 Heat Pump SiBE121135 50 Hz, 220 - 230 - 240 V FTXS42J2V1B FTXS50J2V1B Model Cooling Heating Cooling Heating Rated Capacity 4.2 kW Class 5.0 kW Class Front Panel Color White White 11.3 (399) 12.2 (431) 11.6 (410) 12.1 (427) 9.0 (318) 9.7 (343) 9.2 (325) 9.8 (346)

  • Page 41: Floor Standing Type

    SiBE121135 Heat Pump Floor Standing Type 50 Hz, 220 - 230 - 240 V FVXG25K2V1B FVXG35K2V1B Model Cooling Heating Cooling Heating Rated Capacity 2.5 kW Class 3.5 kW Class Front Panel Color White White 8.9 (314) 9.9 (349) 9.1 (321) 10.2 (360) 7.0 (247) 7.8 (275)
  • Page 42 Heat Pump SiBE121135 50 Hz, 220 - 230 - 240 V FVXS25FV1B FVXS35FV1B Model Cooling Heating Cooling Heating Rated Capacity 2.5 kW Class 3.5 kW Class Front Panel Color White White 8.2 (290) 8.8 (311) 8.5 (300) 9.4 (332) 6.5 (230) 6.9 (244) 6.7 (237) 7.3 (258)
  • Page 43 SiBE121135 Heat Pump Floor / Ceiling Suspended Dual Type 50 Hz, 220 - 230 - 240 V FLXS25BAVMB FLXS35BAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5 kW Class 3.5 kW Class Front Panel Color Almond White Almond White 7.6 (268) 9.2 (325) 8.6 (304) 9.8 (346)

  • Page 44: Duct Connected Type

    Heat Pump SiBE121135 Duct Connected Type 50 Hz, 230 V FDXS25E7VMB FDXS35E7VMB Model Cooling Heating Cooling Heating Rated Capacity 2.5 kW Class 3.5 kW Class 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 Rate (cfm)
  • Page 45 SiBE121135 Heat Pump Ceiling Mounted Cassette Type 50 Hz, 220 - 230 - 240 V FCQG35FVEB FCQG50FVEB Model Cooling Heating Cooling Heating Rated Capacity 3.5 kW Class 5.0 kW Class Model BYCQ140D7W1 / BYCQ140D7W1W / BYCQ140D7GW1 BYCQ140D7W1 / BYCQ140D7W1W / BYCQ140D7GW1 Color Fresh White Fresh White...
  • Page 46 Heat Pump SiBE121135 50 Hz, 230 V FFQ25B9V1B FFQ35B9V1B Model Cooling Heating Cooling Heating Rated Capacity 2.5 kW Class 3.5 kW Class Model BYFQ60B8W1 BYFQ60B8W1 Color White White Decoration Panel Dimensions (H × W × D) 55 × 700 × 700 55 ×...
  • Page 47 SiBE121135 Heat Pump Ceiling Suspended Type 50 Hz, 220 - 230 - 240 V FHQ35BWV1B FHQ50BWV1B Model Cooling Heating Cooling Heating Rated Capacity 3.5 kW Class 5.0 kW Class Panel Color White White 13.0 (459) 13.0 (459) 13.0 (459) 13.0 (459) Airflow Rate m³/min 10.0 (353)
  • Page 48 Heat Pump SiBE121135 Ceiling Mounted Built-in Type 50 Hz, 220 - 230 - 240 V / 50 Hz, 230 V 60 Hz, 220 V FDBQ25B8V1 FBQ35C8VEB Model Cooling Heating Cooling Heating Rated Capacity 2.5 kW Class 3.5 kW Class Model —...

  • Page 49: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE121135 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Outdoor Unit..................38 2. Indoor Unit.....................41 2.1 FTXG25/35/50JV1BW(A) ...............41 2.2 FTXS20/25K2V1B, CTXS15/35K2V1B ..........44 2.3 FTXS25/35/42/50J2V1B.................46 2.4 FTXS60/71GV1B..................49 2.5 FVXG25/35/50K2V1B ................52 2.6 FVXS25/35/50FV1B ................55 2.7 FLXS25/35/50/60BAVMB...............57 2.8 FDXS25/35E7VMB, FDXS50/60C7VMB..........59 2.9 FCQG35/50/60FVEB................61 2.10 FFQ25/35/50/60B9V1B ................64 2.11 FHQ35/50/60BWV1B ................66 2.12 FDBQ25B8V1..................68 2.13 FBQ35/50/60C8VEB ................70...

  • Page 50: Outdoor Unit

    Outdoor Unit SiBE121135 1. Outdoor Unit Connectors and PCB (1): Main PCB Other Parts 1) S10 Connector for terminal board (indoor - outdoor transmission) 2) S15 Connector for COOL / HEAT mode lock ∗ Refer to page 413 for detail. 3) S20 (white) Connector for electronic expansion valve coil A port 4) S21 (red)
  • Page 51 SiBE121135 Outdoor Unit PCB Detail PCB (1): Main PCB (40/50/52/58 class) S101 W V U 2P165232-2 2P165232-4 PCB (1): Main PCB (68/75 class) V100 S101 W V U 3P194316-1 3P194316-2 Printed Circuit Board Connector Wiring Diagram...
  • Page 52 Outdoor Unit SiBE121135 PCB (1): Main PCB (80/90 class) E1 E2 V100 (white) (blue) S101 W V U 2P171491-1 2P171491-2 PCB (2): Service Monitor PCB (for 3 or 4-room model) LED3 LED1 LED4 LED2 LED A S102 3P165332-1 PCB (2): Service Monitor PCB (for 5-room model) LED5 LED3 LED1...

  • Page 53: Indoor Unit

    SiBE121135 Indoor Unit 2. Indoor Unit FTXG25/35/50JV1BW(A) Connectors and [A1P]: Control PCB Other Parts 1) S21 Connector for centralized control (HA) 2) S25 Connector for INTELLIGENT EYE sensor PCB 3) S32 Indoor heat exchanger thermistor 4) S41 Connector for swing motors 5) S42 Connector for reduction motor (front panel mechanism) and limit switch 6) S46...
  • Page 54 Indoor Unit SiBE121135 PCB Detail [A1P]: Control PCB JB JC LED A S200 2P254830-1 Printed Circuit Board Connector Wiring Diagram...
  • Page 55 SiBE121135 Indoor Unit [A2P]: Signal Receiver / Display PCB 3P254832-1 [A3P]: INTELLIGENT EYE Sensor PCB 3P255914-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 56: Ftxs20/25K2V1B, Ctxs15/35K2V1B

    Indoor Unit SiBE121135 FTXS20/25K2V1B, CTXS15/35K2V1B Connectors and PCB(1): Control PCB Other Parts 1) S6 Connector for swing motor (horizontal blade) 2) S25 Connector for INTELLIGENT EYE sensor PCB 3) S26 Connector for display PCB 4) S32 Connector for indoor heat exchanger thermistor 5) S200 Connector for fan motor 6) S403...
  • Page 57 SiBE121135 Indoor Unit PCB Detail PCB(1): Control PCB JA JC JB LED A S200 S403 FG1, FG2 2P297453-1 PCB(2): Display PCB LED3 LED2 LED1 (Solder side) RTH1 3P185701-3 PCB(3): INTELLIGENT EYE Sensor PCB 3P296737-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 58: Ftxs25/35/42/50J2V1B

    Indoor Unit SiBE121135 FTXS25/35/42/50J2V1B Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46...
  • Page 59 SiBE121135 Indoor Unit PCB Detail PCB (1): Control PCB LED A 2P206687-1 Printed Circuit Board Connector Wiring Diagram...
  • Page 60 Indoor Unit SiBE121135 PCB (2): Signal Receiver PCB 3P210728-1 PCB (3): Display PCB LED1 LED2 LED3 RTH1 3P210728-1 PCB (4): INTELLIGENT EYE Sensor PCB 3EB86013-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 61: Ftxs60/71Gv1B

    SiBE121135 Indoor Unit FTXS60/71GV1B Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB 4) S32 Connector for indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46...
  • Page 62 Indoor Unit SiBE121135 PCB Detail PCB (1): Control PCB (3.15A) LED A 2P227881-2 Printed Circuit Board Connector Wiring Diagram...
  • Page 63 SiBE121135 Indoor Unit PCB (2): Signal Receiver PCB 3P247309-1 PCB (3): Display PCB LED1 LED2 LED3 RTH1 3P247309-1 PCB (4): INTELLIGENT EYE Sensor PCB 3P227885-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 64: Fvxg25/35/50K2V1B

    Indoor Unit SiBE121135 FVXG25/35/50K2V1B PCB (1): Main PCB Connectors and Other Parts 1) S1 Connector for fan motor 2) S2 Connector for terminal board 3) S6 Connector for swing motor 4) S21 Connector for centralized control (HA) 5) S26 Connector for service PCB 6) S30 Connector for indoor electronic expansion valve coil (motor operated valve coil)
  • Page 65 SiBE121135 Indoor Unit PCB Detail PCB (1): Main PCB LED A 2P273247-1 Printed Circuit Board Connector Wiring Diagram...
  • Page 66 Indoor Unit SiBE121135 PCB (2): Display PCB 3P273252-1 PCB (3): Service PCB S2W-1 3P273254-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 67: Fvxs25/35/50Fv1B

    SiBE121135 Indoor Unit FVXS25/35/50FV1B PCB (1): Sensor PCB Connectors and Other Parts 1) S49 Connector for control PCB 2) RTH2 (R1T) Room temperature thermistor PCB (2): Control PCB 1) S1 Connector for fan motor 2) S21 Connector for centralized control (HA) 3) S26 Connector for service PCB 4) S32...
  • Page 68 Indoor Unit SiBE121135 PCB Detail PCB (1): Sensor PCB RTH2 3P191450-1 PCB (2): Control PCB LED A S21 S41 2P191446-1 PCB (3): Service PCB PCB (4): Display PCB LED1 LED2 3P191447-1 SW2-4 3P191448-1 LED3 does not function. Printed Circuit Board Connector Wiring Diagram...

  • Page 69: Flxs25/35/50/60Bavmb

    SiBE121135 Indoor Unit FLXS25/35/50/60BAVMB Connectors and PCB (1): Control PCB Other Parts 1) S6 Connector for swing motor (horizontal swing) 2) S7 Connector for AC fan motor 3) S21 Connector for centralized control (HA) 4) S24 Connector for display PCB 5) S26 Connector for signal receiver PCB 6) S32...
  • Page 70 Indoor Unit SiBE121135 PCB Detail PCB (1): Control PCB LED A 2P084352-3 PCB (2): Power Supply PCB 2P084361-1 PCB (3): Display PCB PCB (4): Signal Receiver PCB LED3 LED2 LED1 EX511 REV 12 2P084377-5 PHOTO 2P084377- S31 (RTH) 2P084377-5 Printed Circuit Board Connector Wiring Diagram...

  • Page 71: Fdxs25/35E7Vmb, Fdxs50/60C7Vmb

    SiBE121135 Indoor Unit FDXS25/35E7VMB, FDXS50/60C7VMB Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for AC fan motor 2) S7 Connector for AC fan motor (Hall IC) 3) S21 Connector for centralized control (HA) 4) S26 Connector for display PCB 5) S32 Connector for indoor heat exchanger thermistor 6) H1, H2, H3...
  • Page 72 Indoor Unit SiBE121135 PCB Detail PCB (1): Control PCB LED A 2P131149-1 PCB (2): Display PCB LED3 LED2 RTH1 LED1 2P084375-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 73: Fcqg35/50/60Fveb

    SiBE121135 Indoor Unit FCQG35/50/60FVEB Connectors and [A1P] Other Parts 1) X15A Connector for float switch 2) X16A Connector for room temperature thermistor 3) X17A, X18A Connector for indoor heat exchanger thermistor 4) X20A Connector for fan motor 5) X24A Connector for signal receiver PCB (when the wireless remote controller is used) 6) X27A Connector for terminal board (for inter-unit wiring)
  • Page 74 Indoor Unit SiBE121135 PCB Detail [A1P] X27A X35A X33A X17A X24A X15A X18A X16A X36A 2P263068-4 Printed Circuit Board Connector Wiring Diagram...
  • Page 75 SiBE121135 Indoor Unit [A2P] X10A 2P263045-1 [A3P]: Humidity Sensor PCB Humidity sensor 4EB86011-3 Printed Circuit Board Connector Wiring Diagram...

  • Page 76: Ffq25/35/50/60B9V1B

    Indoor Unit SiBE121135 2.10 FFQ25/35/50/60B9V1B Connectors and [A1P]: Control PCB Other Parts 1) X5A Connector for terminal board (for wired remote controller) 2) X10A, X11A Connector for transformer 3) X15A Connector for float switch 4) X17A, X18A Connector for indoor heat exchanger thermistor 5) X19A Connector for room temperature thermistor 6) X20A...
  • Page 77 SiBE121135 Indoor Unit PCB Detail [A1P]: Control PCB X25A X20A X27A X11A X10A X18A X33A X19A X60A X36A X61A X40A X17A X15A X24A X35A 2P197080-6 Printed Circuit Board Connector Wiring Diagram...

  • Page 78: Fhq35/50/60Bwv1B

    Indoor Unit SiBE121135 2.11 FHQ35/50/60BWV1B Connectors and [A1P]: Control PCB Other Parts 1) X5A Connector for terminal board (for wired remote controller) 2) X10A, X11A Connector for transformer 3) X14A Connector for limit switch (for swing flap) 4) X15A Connector for float switch (option) 5) X17A, X18A Connector for indoor heat exchanger thermistor 6) X19A...
  • Page 79 SiBE121135 Indoor Unit PCB Detail [A1P]: Control PCB X19A X18A X40A X15A X17A X14A X35A X60A X61A X33A X10A X24A X26A X11A X27A X25A 2P197075-6 X29A X20A Printed Circuit Board Connector Wiring Diagram...

  • Page 80: Fdbq25B8V1

    Indoor Unit SiBE121135 2.12 FDBQ25B8V1 Connectors and [A1P]: Control PCB Other Parts 1) X5A Connector for terminal board (for wired remote controller) 2) X10A, X11A Connector for transformer 3) X17A Connector for indoor heat exchanger thermistor 4) X18A Connector for liquid pipe thermistor 5) X19A Connector for room temperature thermistor 6) X21A...
  • Page 81 SiBE121135 Indoor Unit PCB Detail [A1P]: Control PCB X21A X27A X40A X11A X10A X35A X33A X60A X61A 2P095008-8 X18A X19A X17A Printed Circuit Board Connector Wiring Diagram...

  • Page 82: Fbq35/50/60C8Veb

    Indoor Unit SiBE121135 2.13 FBQ35/50/60C8VEB Connectors and [A1P]: Control PCB Other Parts 1) X15A Connector for float switch 2) X16A Connector for room temperature thermistor 3) X17A Connector for indoor heat exchanger thermistor 4) X18A Connector for liquid pipe thermistor 5) X25A Connector for drain pump motor 6) X27A...
  • Page 83 SiBE121135 Indoor Unit PCB Detail [A1P]: Control PCB X17A X18A X15A X30A X16A X70A X85A X33A X35A X27A X28A X25A 2P202878-7 Printed Circuit Board Connector Wiring Diagram...
  • Page 84 Indoor Unit SiBE121135 [A2P]: Fan PCB (for FBQ35/50C8VEB) X10A 2P207230-1 [A2P]: Fan PCB (for FBQ60C8VEB) X10A X3A HAP 2P210642-2 Printed Circuit Board Connector Wiring Diagram...

  • Page 85: Wired Remote Controller

    SiBE121135 Wired Remote Controller 3. Wired Remote Controller BRC1D528 Connectors and 1) P1, P2 Terminal for indoor unit Other Parts 2) R1T Room temperature thermistor 3) SS1 MAIN / SUB setting switch ∗ Refer to page 422 for detail. PCB Detail 2P113638-2 Printed Circuit Board Connector Wiring Diagram...

  • Page 86: Brc1E52A7, Brc1E52B7

    Wired Remote Controller SiBE121135 BRC1E52A7, BRC1E52B7 Connectors and 1) P1, P2 Terminal for indoor unit Other Parts 2) R1T Room temperature thermistor PCB Detail 2P298037-1 2P298037-2 Printed Circuit Board Connector Wiring Diagram...

  • Page 87: Part 4 Function And Control

    SiBE121135 Part 4 Function and Control 1. Indoor Unit Control (RA Models) ............76 1.1 Temperature Control ................76 1.2 Frequency Principle................76 1.3 Operation Starting Control..............78 1.4 Airflow Direction Control.................79 1.5 Fan Speed Control for Indoor Unit ............82 1.6 RADIANT Operation................83 1.7 Program Dry Operation ................85 1.8 Automatic Operation................86 1.9 Thermostat Control.................87 1.10 NIGHT SET Mode ..................89...

  • Page 88: Indoor Unit Control (Ra Models)

    Indoor Unit Control (RA Models) SiBE121135 1. Indoor Unit Control (RA Models) Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures Room temperature: temperature of lower part of the room Set temperature: temperature set by remote controller Room thermistor temperature: temperature detected by room temperature thermistor Target temperature: temperature determined by microcomputer Target temperature...
  • Page 89 SiBE121135 Indoor Unit Control (RA Models) Drawing of The following drawing shows a schematic view of the inverter principle: Inverter Refrigerant circulation rate (high) high speed Amount of heat Amount of heat exchanged air (large) exchanged air (large) high f low f Amount of heat Amount of heat...

  • Page 90: Operation Starting Control

    Indoor Unit Control (RA Models) SiBE121135 Operation Starting Control Outline Wall Mounted Type: FTXG Series 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 91: Airflow Direction Control

    SiBE121135 Indoor Unit Control (RA Models) Airflow Direction Control Power-Airflow The large flap sends a large volume of air downward to the floor. The flap provides an optimum Dual Flaps control in cooling, dry, and heating operation. <Cooling / Dry> During cooling or dry operation, the flap retracts into the indoor unit.
  • Page 92 Indoor Unit Control (RA Models) SiBE121135 Floor Standing Type: FVXS Series Vertical Swing (up and down) Cooling / Dry Heating Upward airflow limit (R6831) (R6829) Upward airflow limit (R6832) (R6830) Floor / Ceiling Suspended Dual Type Vertical Swing (up and down) Cooling / Dry / Fan Heating Ceiling...
  • Page 93 SiBE121135 Indoor Unit Control (RA Models) COMFORT Wall Mounted Type AIRFLOW The vertical swing flap is controlled not to blow the air directly at the people in the room. Operation Cooling / Dry Heating (R11665) (R12181) FTXG 5° 75° FTXS-K, CTXS-K 0°...

  • Page 94: Fan Speed Control For Indoor Unit

    Indoor Unit Control (RA Models) SiBE121135 Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.

  • Page 95: Radiant Operation

    SiBE121135 Indoor Unit Control (RA Models) RADIANT Operation Outline Floor Standing Type: FVXG Series The RADIANT operation has 2 operation modes. RADIANT 1: RADIANT operation with heating RADIANT 2: RADIANT operation only 1.6.1 Indoor Electronic Expansion Valve (Motor Operated Valve) Control Initializing with The indoor electronic expansion valve is initialized when turning on the power.

  • Page 96: Indoor Unit Fan Control

    Indoor Unit Control (RA Models) SiBE121135 1.6.2 Indoor Unit Fan Control The movement of the indoor unit fan is different whether in RADIANT 1 or RADIANT 2. RADIANT 1 starts. Room temperature Set temperature Note: The only difference between RADIANT 1 and RADIANT 2 is the Room temperature movement of the indoor unit fan.

  • Page 97: Program Dry Operation

    SiBE121135 Indoor Unit Control (RA Models) Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and [FAN] setting buttons are inoperable. Detail The microcomputer automatically sets the temperature and airflow rate.

  • Page 98: Automatic Operation

    Indoor Unit Control (RA Models) SiBE121135 Automatic Operation Outline Automatic Cooling / Heating Function When the automatic operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.

  • Page 99: Thermostat Control

    SiBE121135 Indoor Unit Control (RA Models) Thermostat Control Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference returns to the zone C after being in the zone A. The system resumes from defrost control in any zones except A.
  • Page 100 Indoor Unit Control (RA Models) SiBE121135 <Heating / Radiant> Wall Mounted Type: FTXG, FTXS-G series Floor Standing Type: FVXG series Room thermistor temperature – target temperature 2.0˚C 1.5˚C 0.5˚C (R11894) Wall Mounted Type: FTXS-K, CTXS-K, FTXS-J series Floor Standing Type: FVXS series Room thermistor temperature –...

  • Page 101: Night Set Mode

    SiBE121135 Indoor Unit Control (RA Models) 1.10 NIGHT SET Mode Outline When the OFF TIMER is set, the NIGHT SET Mode is automatically activated. The NIGHT SET Mode keeps the airflow rate setting. Detail The NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating.

  • Page 102: Econo Operation

    Indoor Unit Control (RA Models) SiBE121135 1.11 ECONO Operation Wall Mounted Type, Floor Standing Type The "ECONO operation" reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.

  • Page 103: Home Leave Operation

    SiBE121135 Indoor Unit Control (RA Models) 1.12 HOME LEAVE Operation Outline Floor / Ceiling Suspended Dual Type, Duct Connected Type HOME LEAVE operation is a function that allows you to record your favorite set temperature and airflow rate. You can start your favorite operation mode simply by pressing the [HOME LEAVE] button on the remote controller.

  • Page 104: Intelligent Eye Operation

    Indoor Unit Control (RA Models) SiBE121135 1.13 INTELLIGENT EYE Operation Outline Wall Mounted Type: FTXG, FTXS-K, CTXS-K, FTXS-G Series This function detects the existence of humans in the room with a human motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity.

  • Page 105: 2-Area Intelligent Eye Operation

    SiBE121135 Indoor Unit Control (RA Models) 1.14 2-Area INTELLIGENT EYE Operation Outline Wall Mounted Type: FTXS-J Series The following functions can be performed by a motion sensor (INTELLIGENT EYE). 1. Reduction of the capacity when there is nobody in the room in order to save electricity (energy saving operation) 2.
  • Page 106 Indoor Unit Control (RA Models) SiBE121135 2. Motions (for example: in cooling) within 20 minutes 20 min. 20 min. Human detection signal RESET. (From area A or B) Target temperature INTELLIGENT EYE lamp Remote controller [INTELLIGENT EYE] button Operation Set speed Set speed Fan speed ( ) (R15308)

  • Page 107: Inverter Powerful Operation

    SiBE121135 Indoor Unit Control (RA Models) 1.15 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. Detail When the [POWERFUL] button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.
  • Page 108 Indoor Unit Control (RA Models) SiBE121135 Brightness The brightness of the multi-colored indicator lamp can be adjusted L (low), H (high), or OFF. Setting 1. Press the center of the [Temp] button and the [Mode] button at the same time. (R11669) 5C is displayed on the LCD.

  • Page 109: Other Functions

    SiBE121135 Indoor Unit Control (RA Models) 1.17 Other Functions 1.17.1 Hot-Start Function In order to prevent the cold air blast that normally comes when heating operation is started, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or made very weak thereby carrying out comfortable heating of the room.

  • Page 110: Weekly Timer Operation

    Indoor Unit Control (RA Models) SiBE121135 1.17.7 Auto-restart Function If a power failure (including one for just a moment) occurs during the operation, the operation restarts automatically when the power is restored in the same condition as before the power failure.

  • Page 111: Indoor Unit Control (Sa Models)

    SiBE121135 Indoor Unit Control (SA Models) 2. Indoor Unit Control (SA Models) Drain Pump Control 2.1.1 When the Float Switch is Tripped While the Cooling Thermostat is The remote controller displays A3 and the indoor unit stops. Thermostat (running) Float switch Drain pump 5 min.
  • Page 112 Indoor Unit Control (SA Models) SiBE121135 2.1.3 When the Float Switch is Tripped During Heating Operation: The remote controller displays A3 and the indoor unit stops. Thermostat (running) Humidifier Reset Float switch Drain pump 5 min. 5 sec. 5 min. (R16094) During heating operation, if the float switch is not reset even after the 5 minutes operation, 5 seconds stop, 5 minutes operation cycle ends, operation continues until the switch is reset.

  • Page 113: Thermostat Sensor In Remote Controller

    SiBE121135 Indoor Unit Control (SA Models) Thermostat Sensor in Remote Controller Temperature is controlled by both the thermostat sensor in remote controller and air suction thermostat in the indoor unit. (This is however limited to when the field setting for the thermostat sensor in remote controller is set to “Use.”...
  • Page 114 Indoor Unit Control (SA Models) SiBE121135 Heating When heating, the hot air rises to the top of the room, resulting in the temperature being lower near the floor where the occupants are. When controlling by body thermostat sensor only, the indoor unit may therefore be turned off by the thermostat before the lower part of the room reaches the set temperature.

  • Page 115: Freeze Prevention Control

    SiBE121135 Indoor Unit Control (SA Models) Freeze Prevention Control When the temperature detected by liquid pipe thermistor (R2T) of the indoor heat exchanger drops too low, the unit enters freeze prevention control in accordance with the following conditions, and is also set in accordance with the conditions given below. Conditions for starting: Temperature is –1°C or less for total of 40 min., or temperature is –5°C or less for total of 10 min.

  • Page 116: Hot Start Control (In Heating Operation Only)

    Indoor Unit Control (SA Models) SiBE121135 Hot Start Control (In Heating Operation Only) Outline At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity. Detail Defrost ending or oil return ending Hot start ending conditions...

  • Page 117: Function Of Thermistor

    SiBE121135 Function of Thermistor 3. Function of Thermistor Illustrations are for 4-room models as representative and have 4 lines of indoor unit system (A ~ D). 3-room models have 3 lines (A ~ C) and 5-room models have 5 lines (A ~ E). Cooling Only Model Outdoor electronic expansion valve...
  • Page 118 Function of Thermistor SiBE121135 (2) Discharge 1. The discharge pipe thermistor is used for controlling discharge pipe temperature. If the Pipe Thermistor discharge pipe temperature (used in place of the inner temperature of the compressor) rises abnormally, the operating frequency becomes lower or the operation halts. 2.

  • Page 119: Control Specification

    SiBE121135 Control Specification 4. Control Specification Mode Hierarchy Outline There are 3 modes; normal operation mode, forced operation mode, and power transistor test mode for installation and servicing. Detail Cooling Only Model Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode Cooling (includes drying)

  • Page 120: Frequency Control

    Control Specification SiBE121135 Frequency Control Outline Frequency that corresponds to each room’s capacity is determined according to the difference between the target temperature and the temperature of each room. The function is explained as follows. 1. How to determine frequency 2.
  • Page 121 SiBE121135 Control Specification For Heat Pump Model 1. Determine command frequency Command frequency is determined in the following order of priority. 1. Limiting defrost control time 2. Forced cooling / heating 3. Indoor frequency command 2. Determine upper limit frequency The minimum value is set as upper limit frequency among the frequency upper limits of the following functions: Compressor protection, input current, discharge pipe temperature, low Hz high pressure...
  • Page 122 Control Specification SiBE121135 PI Control (Determine Frequency Up / Down by ∆D Signal) 1. P control A total of the ∆D value is calculated in each sampling time (20 seconds), and the frequency is adjusted according to its difference from the frequency previously calculated. 2.

  • Page 123: Controls At Mode Changing / Start-Up

    SiBE121135 Control Specification Controls at Mode Changing / Start-up 4.3.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the preheating command from the outdoor unit. Detail ON Condition When the outdoor temperature is below 10.5°C, the inverter operation in open phase starts. OFF Condition When the outdoor temperature is higher than 12°C, the inverter operation in open phase stops.

  • Page 124: Discharge Pipe Temperature Control

    Control Specification SiBE121135 4.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not used when defrosting.) (Hz) Frequency (sec.) Time (R13528) 40/50/52/58 class 68/75/80/90 class A (Hz) B (Hz) C (Hz)

  • Page 125: Input Current Control

    SiBE121135 Control Specification Input Current Control Outline An input current is detected by the CT while the compressor is running, and the frequency upper limit is set from the input current. In case of heat pump models, this control which is the upper limit control of the frequency takes priority over the lower limit control of four way valve operation compensation.

  • Page 126: Heating Peak-Cut Control

    Control Specification SiBE121135 Heating Peak-cut Control Outline During heating operation, the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure. Detail The operating frequency is judged with the indoor heat exchanger temperature 2 minutes after the operation starts and seconds after the number of operation room is changed.

  • Page 127: Outdoor Fan Control

    SiBE121135 Control Specification Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting.

  • Page 128: Defrost Control

    Control Specification SiBE121135 4.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish. Detail Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 129: Low Hz High Pressure Limit

    SiBE121135 Control Specification 4.11 Low Hz High Pressure Limit Outline The upper limit of high pressure in a low Hz zone is set. The upper limit of the indoor heat exchanger temperature is also set by the operating frequency. Zones are divided into three, reset zone, keep zone, and dropping zone, and the frequency control is carried out according to each zone.
  • Page 130 Control Specification SiBE121135 Detail The followings are the examples of the outdoor electronic expansion valve control which function in each operation mode. Operation pattern : Holding Functions — : No Functions When power is turned on Fully closed when power is turned on —...

  • Page 131: Pressure Equalizing Control

    SiBE121135 Control Specification 4.12.1 Fully Closing with Power on The outdoor electronic expansion valve is initialized when the power is turned on. The opening position is set and the pressure equalization is developed. 4.12.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The outdoor electronic expansion valve opens, and develops the pressure equalization.
  • Page 132 Control Specification SiBE121135 4.12.8 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the outdoor electronic expansion valve opens according to the outdoor temperature and the operation frequency, and operates for a specified time, and then stops.
  • Page 133 SiBE121135 Control Specification 4.12.11Target Discharge Pipe Temperature Control The target discharge pipe temperature is obtained from the indoor and outdoor heat exchanger temperature, and the outdoor electronic expansion valve opening is adjusted so that the actual discharge pipe temperature becomes close to the target discharge pipe temperature. (Indirect SH (superheating) control using the discharge pipe temperature) The target discharge pipe temperature is set as to become the...

  • Page 134: Malfunctions

    Control Specification SiBE121135 4.13 Malfunctions 4.13.1 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. Radiation fin thermistor 4. Gas pipe thermistor 5.
  • Page 135 SiBE121135 Control Specification 4.13.4 Anti-icing Function During cooling, if the indoor heat exchanger temperature in the operation stopped room becomes below the specified temperature for the specified time, the outdoor electronic expansion valve is opened in the operation stopped room as specified, and the fully closed operation is carried out.

  • Page 136: Part 5 Operation Manual

    SiBE121135 Part 5 Operation Manual 1. System Configuration................125 2. RA Indoor Unit..................126 2.1 FTXG, FTXS-K, CTXS, FVXG Series - ARC466A1, A2, A6 ....126 2.2 FTXS-J, FTXS-G, FVXS Series - ARC452A1, A3........178 2.3 FLXS, FDXS Series - ARC433B67, B69 ..........218 3. SA Indoor Unit..................233 3.1 BRC1D528 ...................233 Operation Manual...

  • Page 137: System Configuration

    SiBE121135 System Configuration 1. System Configuration After installation and trial operation of the room air conditioner are completed, the air conditioner should be handled and operated as described in the following pages. Every user should be informed on the correct method of operation and how to check if it can cool (or heat) well, and how to use it efficiently.

  • Page 138: Ra Indoor Unit

    RA Indoor Unit SiBE121135 2. RA Indoor Unit FTXG, FTXS-K, CTXS, FVXG Series - ARC466A1, A2, A6 2.1.1 Manual Contents and Reference Page Wall Mounted Type Floor Standing Type Model Series FTXS20/25K2V1B FTXG25-50JV1BW(A) FVXG25-50K2V1B CTXS15/35K2V1B Read Before Operation Names of Parts Preparation before Operation Operation AUTO ·...

  • Page 139: Name Of Parts

    SiBE121135 RA Indoor Unit 2.1.2 Name of Parts FTXG25/35/50JV1BW(A) Name of Parts Indoor Unit Air inlet INTELLIGENT EYE sensor • Appearance of the indoor unit may differ. • It detects the movements of people and automatically switches between normal operation and energy saving operation.
  • Page 140 RA Indoor Unit SiBE121135 Open the front panel Panel support plate Air filter Titanium apatite photocatalytic air-purifying filter Operation Manual...

  • Page 141: Remote Controller

    SiBE121135 RA Indoor Unit Name of Parts Remote Controller Signal transmitter Receiver 50cm or more Display (LCD) • It displays the current settings. • To use the remote controller, aim the (In this illustration, each section is transmitter at the indoor unit. If there shown with its displays on for the is anything to block signals between purpose of explanation.)
  • Page 142 RA Indoor Unit SiBE121135 Open the front cover MODE selector button • It selects the operation mode. (AUTO/DRY/COOL/HEAT/ FAN) ECONO button • ECONO operation. SWING button • Adjusting the airflow direction. QUIET button • OUTDOOR UNIT QUIET operation. INTELLIGENT EYE button •...

  • Page 143: Model Name Plate

    SiBE121135 RA Indoor Unit FTXS20/25K2V1B, CTXS15/35K2V1B Name of Parts Indoor Unit Air inlet INTELLIGENT EYE sensor • It detects the movements of people and automatically switches between normal operation and energy saving operation. Front panel Air outlet Room temperature sensor Model name Louvers (vertical blades) •...
  • Page 144 RA Indoor Unit SiBE121135 Open the front panel Air filter Titanium apatite photocatalytic air-purifying filter Operation Manual...
  • Page 145 SiBE121135 RA Indoor Unit Name of Parts Remote Controller Signal transmitter Receiver Display (LCD) • It displays the current settings. • To use the remote controller, aim the (In this illustration, each section is transmitter at the indoor unit. If there shown with its displays on for the is anything to block signals between purpose of explanation.)
  • Page 146 RA Indoor Unit SiBE121135 Open the front cover MODE selector button • It selects the operation mode. (AUTO/DRY/COOL/HEAT/ FAN) ECONO button • ECONO operation. SWING button • Adjusting the airflow direction. QUIET button • OUTDOOR UNIT QUIET operation. INTELLIGENT EYE button •...
  • Page 147 SiBE121135 RA Indoor Unit FVXG25/35/50K2V1B Name of Parts Indoor Unit Louvers (vertical blades) • The louvers are inside of the air outlet. Air outlet Flap (horizontal blade) Radiant panel Front panel Air inlet Room temperature sensor • It detects the air temperature around the unit. Display Signal receiver and Indoor unit ON/OFF switch...

  • Page 148: Titanium Apatite Photocatalytic

    RA Indoor Unit SiBE121135 Open the front panel Front panel stopper Strings CAUTION • The surface of the radiant panel becomes very hot during RADIANT operation. Do not touch the panel of the main unit directly. After the operation is complete, do not remove or care and clean the panel until the surface Air filter (upper) temperature of the panel decreases.
  • Page 149 SiBE121135 RA Indoor Unit Name of Parts Remote Controller Signal transmitter Receiver Display (LCD) • It displays the current settings. (In this illustration, each section is shown with its displays on for the purpose of explanation.) • To use the remote controller, aim the transmitter at the indoor unit.
  • Page 150 RA Indoor Unit SiBE121135 Open the front cover MODE selector button • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) ECONO button • ECONO operation. SWING button • Adjusting the airflow direction. QUIET button • OUTDOOR UNIT QUIET operation. Lamp brightness setting button POWERFUL button •...

  • Page 151: Preparation Before Operation

    SiBE121135 RA Indoor Unit 2.1.3 Preparation before Operation Preparation before Operation To set the batteries Position – Slide the front cover to take it off. correctly! Set two dry batteries AAA.LR03 (alkaline). Set the front cover as before. To fix the remote controller holder on the wall Remote controller Choose a place from where the signals reach the unit.
  • Page 152 RA Indoor Unit SiBE121135 Turn the breaker on • After the power is turned on, the flap of the indoor unit opens and closes once to set the reference position. To set the clock Press • “ ” is displayed on the LCD. •...

  • Page 153: Fan Operation

    SiBE121135 RA Indoor Unit 2.1.4 AUTO · DRY · COOL · HEAT · FAN Operation FTXG25/35/50JV1BW(A) 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 Press and select an operation mode.

  • Page 154: Operating Conditions

    RA Indoor Unit SiBE121135 To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. COOL operation HEAT operation AUTO operation DRY or FAN operation 18-32˚C 10-30˚C 18-30˚C The temperature setting is Press to raise the temperature and press...
  • Page 155 SiBE121135 RA Indoor Unit FTXS20/25K2V1B, CTXS15/35K2V1B 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 Press and select an operation mode.
  • Page 156 RA Indoor Unit SiBE121135 To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. HEAT operation AUTO operation DRY or FAN operation COOL operation 10-30˚C 18-30˚C 18-32˚C The temperature setting is Press to raise the temperature and press...
  • Page 157 SiBE121135 RA Indoor Unit FVXG25/35/50K2V1B 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.
  • Page 158 RA Indoor Unit SiBE121135 2.1.5 RADIANT Operation RADIANT Operation The RADIANT operation provides a comfortable environment with quiet and currentless heating operation in addition to the HEAT operation mode. The RADIANT operation has 2 operation modes. To start RADIANT operation Press and select an HEAT operation.

  • Page 159: Temperature Setting

    SiBE121135 RA Indoor Unit 2.1.6 Temperature Setting Temperature Setting To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. HEAT or RADIANT COOL operation AUTO operation DRY or FAN operation operation 18-32˚C 10-30˚C...

  • Page 160: Adjusting The Airflow Direction And Rate

    RA Indoor Unit SiBE121135 2.1.7 Adjusting the Airflow Direction and Rate FTXG25/35/50JV1BW(A) Adjusting the Airflow Direction and Rate You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ”...

  • Page 161: Ra Indoor Unit

    SiBE121135 RA Indoor Unit To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.
  • Page 162 RA Indoor Unit SiBE121135 FTXS20/25K2V1B, CTXS15/35K2V1B Adjusting the Airflow Direction and Rate You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. •...
  • Page 163 SiBE121135 RA Indoor Unit To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.
  • Page 164 RA Indoor Unit SiBE121135 FVXG25/35/50K2V1B Adjusting the Airflow Direction and Rate You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. • The flap (horizontal blade) will begin to swing. To set the flap at desired position •...
  • Page 165 SiBE121135 RA Indoor Unit Adjusting the Airflow Direction and Rate To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.

  • Page 166: Comfort Airflow Operation

    RA Indoor Unit SiBE121135 2.1.8 COMFORT AIRFLOW Operation COMFORT AIRFLOW Operation The flow of air will be in the upward direction while in COOL operation and in the downward direction while in HEAT operation, which will provide a comfortable wind that will not come in direct contact with people. To start COMFORT AIRFLOW operation Press •...
  • Page 167 SiBE121135 RA Indoor Unit 2.1.9 INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. If nobody in the room for more than 20 minutes, the operation automatically changes to energy saving operation. To start INTELLIGENT EYE operation Press •...
  • Page 168 RA Indoor Unit SiBE121135 INTELLIGENT EYE Operation [Example] When someone is in the When no one is in the room Someone is back in the room room 20 minutes after, start energy saving operation. Back to normal operation. Normal operation •...

  • Page 169: Powerful Operation

    SiBE121135 RA Indoor Unit 2.1.10 POWERFUL Operation FTXG25/35/50JV1BW(A), FTXS20/25K2V1B, CTXS15/35K2V1B POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation modes. You can get the maximum capacity. To start POWERFUL operation Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.
  • Page 170 RA Indoor Unit SiBE121135 FVXG25/35/50K2V1B POWERFUL Operation POWERFUL operation quickly maximises the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 171: Outdoor Unit Quiet Operation

    SiBE121135 RA Indoor Unit 2.1.11 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 the night. To start OUTDOOR UNIT QUIET operation Press •...
  • Page 172 RA Indoor Unit SiBE121135 2.1.12 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 173: Off Timer Operation

    SiBE121135 RA Indoor Unit 2.1.13 OFF TIMER Operation FTXG25/35/50JV1BW(A) OFF 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.
  • Page 174 RA Indoor Unit SiBE121135 FTXS20/25K2V1B, CTXS15/35K2V1B OFF 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 175 SiBE121135 RA Indoor Unit FVXG25/35/50K2V1B OFF 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 176: On Timer Operation

    RA Indoor Unit SiBE121135 2.1.14 ON TIMER Operation FTXG25/35/50JV1BW(A) ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press • “ ” is displayed on the LCD. •...
  • Page 177 SiBE121135 RA Indoor Unit FTXS20/25K2V1B, CTXS15/35K2V1B ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press • “ ” is displayed on the LCD. • “ ”...
  • Page 178 RA Indoor Unit SiBE121135 FVXG25/35/50K2V1B ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press • “ ” is displayed on the LCD. • “ ”...
  • Page 179 SiBE121135 RA Indoor Unit 2.1.15 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 [Example] The same timer settings are made for the week from Monday through Friday while different timer settings are...
  • Page 180 RA Indoor Unit SiBE121135 To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C...
  • Page 181 SiBE121135 RA Indoor Unit WEEKLY TIMER Operation Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to step when setting the OFF TIMER.
  • Page 182 RA Indoor Unit SiBE121135 Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C...
  • Page 183 SiBE121135 RA Indoor Unit WEEKLY TIMER Operation Confirming a reservation • The reservation can be confirmed. Setting Displays Normal Confirmation Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
  • Page 184 RA Indoor Unit SiBE121135 To delete reservations The individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press •...

  • Page 185: Note For Multi System

    SiBE121135 RA Indoor Unit 2.1.16 Note for Multi System Note for Multi System Multi system has one outdoor unit connected to multiple indoor units. Selecting the operation mode With the priority room setting present but A room B room inactive or not present. When more than one indoor unit is operating, priority is given to the first unit that was turned on.
  • Page 186 RA Indoor Unit SiBE121135 COOL/HEAT mode lock The COOL/HEAT mode lock requires initial programming during installation. Please consult your authorised dealer for assistance. The COOL/HEAT mode lock sets the unit forcibly to either COOL or HEAT operation. This function is convenient when you wish to set all indoor units connected to the multi system to the same operation mode.
  • Page 187 SiBE121135 RA Indoor Unit 2.1.17 Quick Reference FTXG25/35/50JV1BW(A) Quick Reference Operation Manual...
  • Page 188 RA Indoor Unit SiBE121135 FTXS20/25K2V1B, CTXS15/35K2V1B Quick Reference Operation Manual...
  • Page 189 SiBE121135 RA Indoor Unit FVXG25/35/50K2V1B Quick Reference Operation Manual...

  • Page 190: Ftxs-J, Ftxs-G, Fvxs Series - Arc452A1, A3

    RA Indoor Unit SiBE121135 FTXS-J, FTXS-G, FVXS Series - ARC452A1, A3 2.2.1 Manual Contents and Reference Page Wall Mounted Type Floor Standing Type Model Series FTXS25-50J2V1B FTXS60/71GV1B FVXS25-50FV1B Read Before Operation Names of Parts Operation AUTO · DRY · COOL · HEAT · FAN Operation Adjusting the Airflow Direction COMFORT AIRFLOW and INTELLIGENT...
  • Page 191 SiBE121135 RA Indoor Unit 2.2.2 Names of Parts FTXS20/25/35/42/50J2V1B Names of Parts Indoor Unit Operation Manual...
  • Page 192 RA Indoor Unit SiBE121135 Indoor Unit 13. Indoor unit ON/OFF switch: 1. Air filter • 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 193 SiBE121135 RA Indoor Unit Remote Controller <Open the front cover> <ARC452A3> 1. Signal transmitter: 11. SWING button: • It sends signals to the indoor unit. • Vertical blades (louvers) 2. Display: 12. COMFORT/SENSOR button: • It displays the current settings. •...

  • Page 194: Names Of Parts

    RA Indoor Unit SiBE121135 FTXS60/71GV1B Names of Parts Indoor Unit Operation Manual...
  • Page 195 SiBE121135 RA Indoor Unit Indoor Unit 1. Air filter 13. 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 •These filters are attached to the inside of table.

  • Page 196: Names Of Parts

    RA Indoor Unit SiBE121135 Names of Parts Remote Controller <Open the front cover> <ARC452A3> 1. Signal transmitter: 10. SWING button: • It sends signals to the indoor unit. • Flaps (horizontal blades) 2. Display (LCD): 11. SWING button: • Louvers (vertical blades) •...

  • Page 197: Opening The Front Panel

    SiBE121135 RA Indoor Unit FVXS25/35/50FV1B Names of parts Indoor Unit Opening the Front Panel Air outlet selection switch • This setting blows air from upper outlet only. This setting automatically decides a blow • pattern depending on mode and conditions. •...
  • Page 198 RA Indoor Unit SiBE121135 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. Air outlet COOLING COOL 22˚C...
  • Page 199 SiBE121135 RA Indoor Unit Remote Controller <Open the lid> <ARC452A1> 1. Signal transmitter: 9. ECONO button: ECONO operation • It sends signals to the indoor unit. 10. SWING button: 2. Display: • Adjusting the Airflow Direction • It displays the current settings. (In this illustration, each section is shown 11.
  • Page 200 RA Indoor Unit SiBE121135 2.2.3 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.

  • Page 201: To Change The Airflow Rate Setting

    SiBE121135 RA Indoor Unit To change the airflow rate setting 5. Press AUTO or COOL or HEAT or FAN operation DRY operation 5 levels of airflow rate setting from “ ” to “ ” plus “ ” The airflow rate setting is not variable. “...

  • Page 202: Adjusting The Airflow Direction

    RA Indoor Unit SiBE121135 2.2.4 Adjusting the Airflow Direction FTXS20/25/35/42/50J2V1B Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. •...
  • Page 203 SiBE121135 RA Indoor Unit To set the flaps or louvers at desired position • This function is effective while flaps or louvers are in auto swing mode. Press when the flaps or louvers have reached the desired position. • In the 3-D airflow, the flaps and louvers move in turn. •...
  • Page 204 RA Indoor Unit SiBE121135 FTXS60/71GV1B Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. • The flaps (horizontal blades) will begin to swing. Right and left airflow direction Press •...
  • Page 205 SiBE121135 RA Indoor Unit To set the flaps or louvers at desired position • This function is effective while flaps or louvers are in auto swing mode. Press when the flaps or louvers have reached the desired position. • In the 3-D airflow, the flaps and louvers move in turn. •...
  • Page 206 RA Indoor Unit SiBE121135 FVXS25/35/50FV1B 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 207 SiBE121135 RA Indoor Unit Airflow 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 Blowing pattern Situation •...

  • Page 208: Comfort Airflow And Intelligent Eye Operation

    RA Indoor Unit SiBE121135 2.2.5 COMFORT AIRFLOW and INTELLIGENT EYE Operation FTXS20/25/35/42/50J2V1B COMFORT AIRFLOW and INTELLIGENT EYE Operation COMFORT AIRFLOW operation The flow of air will be in the upward direction while in COOL operation and in the downward direction while in HEAT operation, which will provide a comfortable wind that will not come in direct contact with people.
  • Page 209 SiBE121135 RA Indoor Unit To start operation Press and select the desired mode. • Each time the is pressed a different setting option is displayed on the LCD. • By selecting “ ” from the following icons, the air conditioner will be in COMFORT AIRFLOW operation combined with INTELLIGENT EYE operation.
  • Page 210 RA Indoor Unit SiBE121135 COMFORT AIRFLOW and INTELLIGENT EYE Operation NOTE Notes on COMFORT AIRFLOW operation • The flap position will change, preventing air from blowing directly on the occupants of the room. • POWERFUL operation and COMFORT AIRFLOW operation cannot be used at the same time.
  • Page 211 SiBE121135 RA Indoor Unit NOTE Note on combination of COMFORT AIRFLOW operation and INTELLIGENT EYE operation • The airflow rate will be set to AUTO. If the upper and lower airflow direction is selected, the COMFORT AIRFLOW operation will be canceled. Priority is given to the function of whichever button is pressed last.
  • Page 212 RA Indoor Unit SiBE121135 FTXS60/71GV1B COMFORT AIRFLOW and INTELLIGENT EYE Operation COMFORT AIRFLOW operation The flow of air will be in the upward direction while in COOL operation and in the downward direction while in HEAT operation, which will provide a comfortable wind that will not come in direct contact with people.
  • Page 213 SiBE121135 RA Indoor Unit To start operation Press and select the desired mode. • Each time the is pressed a different setting option is displayed on the LCD. • By selecting “ ” from the following icons, the air conditioner will be in COMFORT AIRFLOW operation combined with INTELLIGENT EYE operation.
  • Page 214 RA Indoor Unit SiBE121135 COMFORT AIRFLOW and INTELLIGENT EYE Operation NOTE Notes on COMFORT AIRFLOW operation • The flap position will change, preventing air from blowing directly on the occupants of the room. • POWERFUL operation and COMFORT AIRFLOW operation cannot be used at the same time.
  • Page 215 SiBE121135 RA Indoor Unit 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 operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 216: Quiet Operation

    RA Indoor Unit SiBE121135 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 217 SiBE121135 RA Indoor Unit 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 218 RA Indoor Unit SiBE121135 2.2.9 OFF TIMER Operation OFF 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 219 SiBE121135 RA Indoor Unit 2.2.10 ON TIMER Operation ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press • “ ” and setting time are displayed on the LCD. •...
  • Page 220 RA Indoor Unit SiBE121135 2.2.11 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 221 SiBE121135 RA Indoor Unit WEEKLY TIMER Operation To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C...
  • Page 222 RA Indoor Unit SiBE121135 6. Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to step 9 when setting the OFF TIMER. 7.
  • Page 223 SiBE121135 RA Indoor Unit WEEKLY TIMER Operation Setting Displays Day and number ON/OFF Time Temperature NOTE Notes on WEEKLY TIMER operation • Do not forget to set the clock on the remote control first. • The day of the week, ON/OFF TIMER mode, time and set temperature (only for ON TIMER mode) can be set with WEEKLY TIMER.

  • Page 224: Copy Mode

    RA Indoor Unit SiBE121135 Copy mode • A reservation made once can be copied another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C...
  • Page 225 SiBE121135 RA Indoor Unit WEEKLY TIMER Operation 5. Press • The reservation will be copied to the selected day of the week. The whole reservation of the selected day of the week will be copied. • To continue copying the settings to other days of the week, repeat step 4 and step 5.
  • Page 226 RA Indoor Unit SiBE121135 Confirming a reservation • The reservation can be confirmed. 1. Press • The day of the week and the reservation number of current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
  • Page 227 SiBE121135 RA Indoor Unit WEEKLY TIMER Operation To delete reservations The individual reservation • Refer to setting mode. When selecting desired mode at step 4 in setting mode, select “blank”. The reservation will be deleted. The reservations for each day of the week •...
  • Page 228 RA Indoor Unit SiBE121135 2.2.12 Note for Multi System Note for Multi System This system has one outdoor unit connected to multiple indoor units. Selecting the operation mode A room B room 1. With the priority room setting present but inactive or not present. When more than 1 indoor unit is operating, priority is given to the first unit that was turned on.
  • Page 229 SiBE121135 RA Indoor Unit Note for Multi System OUTDOOR UNIT QUIET operation 1. With the priority room setting present but inactive or not present. When using the OUTDOOR UNIT QUIET operation feature with the Multi system, set all indoor units to OUTDOOR UNIT QUIET operation using their remote controllers. When clearing OUTDOOR UNIT QUIET operation, clear one of the operating indoor units using their remote controller.

  • Page 230: Flxs, Fdxs Series - Arc433B67, B69

    RA Indoor Unit SiBE121135 FLXS, FDXS Series - ARC433B67, B69 2.3.1 Manual Contents and Reference Page Floor / Ceiling Suspended Dual Type Duct Connected Type Model Series FDXS25/35E7VMB FLXS25-60BAVMB FDXS50/60C7VMB Read Before Operation Remote Controller Operation AUTO · DRY · COOL · HEAT · FAN Operation Adjusting the Airflow Direction —...
  • Page 231 SiBE121135 RA Indoor Unit 2.3.2 Remote Controller FLXS25/35/50/60BAVMB Remote Controller < ARC433B67, B68 > 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2. Display: (AUTO/DRY/COOL/HEAT/FAN) • It displays the current settings. 8.
  • Page 232 RA Indoor Unit SiBE121135 FDXS25/35E7VMB, FDXS50/60C7VMB Remote Controller < ARC433B69, B76 > 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2. Display: (AUTO/DRY/COOL/HEAT/FAN) • It displays the current settings. 8.
  • Page 233 SiBE121135 RA Indoor Unit 2.3.3 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.

  • Page 234: To Change The Air Flow Rate Setting

    RA Indoor Unit SiBE121135 To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...
  • Page 235 SiBE121135 RA Indoor Unit 2.3.4 Adjusting the Airflow Direction FLXS25/35/50/60BAVMB 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 236 RA Indoor Unit SiBE121135 To adjust the vertical blades (louvers) • When adjusting the louver, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvers. (You will find a knob on the left side and the right side blades.) Notes on flap and louvers angles.
  • Page 237 SiBE121135 RA Indoor Unit 2.3.5 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.
  • Page 238 RA Indoor Unit SiBE121135 2.3.6 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 239 SiBE121135 RA Indoor Unit 2.3.7 HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. To start HOME LEAVE operation 1. Press “HOME LEAVE button” . •...
  • Page 240 RA Indoor Unit SiBE121135 What’s the HOME LEAVE operation? Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate.

  • Page 241: Timer Operation

    SiBE121135 RA Indoor Unit 2.3.8 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 242 RA Indoor Unit SiBE121135 To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.
  • Page 243 SiBE121135 RA Indoor Unit 2.3.9 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 Outdoor unit Selecting the Operation Mode room Living room 1.
  • Page 244 RA Indoor Unit SiBE121135 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 245: Sa Indoor Unit

    SiBE121135 SA Indoor Unit 3. SA Indoor Unit BRC1D528 23 7 Operation Manual...
  • Page 246 SA Indoor Unit SiBE121135 Start Operation Manual...
  • Page 247 SiBE121135 SA Indoor Unit BRC1D528 Remote controller Operation manual 1. Features and functions THANK YOU FOR PURCHASING THIS The BRC1D528 is a state of the art remote controller CONTROLLER. READ THE MANUAL that offers full control over your installation. ATTENTIVELY BEFORE USING THE INSTALLATION.
  • Page 248 SA Indoor Unit SiBE121135 LEAVE HOME AIR CLEANING ICON The leave home function prevents the room This icon indicates that the air cleaning unit (option) is temperature from dropping when the occupants are operational. out for a longer period. If the room temperature drops below 10°C, heating is started automatically.
  • Page 249 SiBE121135 SA Indoor Unit MAXTEMPERATURE IMUM SET NOT AVAILABLE The maximum set temperature indicates the is displayed whenever a non-installed option maximum set temperature when in limit operation. is addressed or a function is not available. MINIMUM SET TEMPERATURE FAN SPEED ICON The minimum set temperature indicates the minimum This icon indicates the set fan speed.
  • Page 250 SA Indoor Unit SiBE121135 AIR FILTER CLEANING TIME ICON RESET SCHEDULE TIMER BUTTON BUTTON This button enables or disables the schedule timer. This button is used to reset the air filter cleaning time TIME ADJUST BUTTON icon. These buttons are used to adjust the clock or, when in 3.
  • Page 251 SiBE121135 SA Indoor Unit 4. Description of the operation modes Defrost (heat pump types only) In heating operation, freezing of the outdoor heat FAN ONLY OPERATION exchanger may occur. If so, the heating capacity of In this mode, air only circulates without heating or the system lowers and the system goes into defrost cooling.
  • Page 252 SA Indoor Unit SiBE121135 Use the button to select the desired operation AUTOMATIC OPERATION mode. User adjustable parameters: • Setpoint temperature, use the & Fan only operation buttons, Dry operation • Fan speed, use the button, Automatic operation • Air flow direction adjust, use the button, Cooling operation •...
  • Page 253 SiBE121135 SA Indoor Unit ADDITIONAL FEATURES OF THE CONTROLLER NOTE The schedule timer overrules the LEAVE HOME button, only use the button to enable or disable the schedule timer. The Press the buttons schedule timer is enabled when the simultaneously to enable the LEAVE HOME function. icon is visible.
  • Page 254 SA Indoor Unit SiBE121135 What can the schedule timer do? • switch off the installation (the schedule timer The concept of the schedule timer is simple, remains enabled and reactivates the straightforward though powerful. installation as programmed); the operation The schedule timer can order 3 actions: lamp will turn off, 1 switch on the installation at a scheduled time, in •...
  • Page 255 SiBE121135 SA Indoor Unit button is used to exit browsing at once Continue pressing the button until the day of the (without having to scroll through all programmed week indicator displays the current day (not blinking), actions). you have now quit browsing. Press the button to enter the browse mode, the NOTE...
  • Page 256 SA Indoor Unit SiBE121135 Programmed actions might overlap; due to the "last Getting started command overrules" logic, the last scheduled Programming the schedule timer is flexible (you can command will rule. add, remove or alter programmed actions whenever required) and straightforward (programming steps are limited to a minimum).
  • Page 257 SiBE121135 SA Indoor Unit Programming In this particular case, no actions have been programmed before, all schedule timer actions are idle. • Browse to Monday by pressing the button. THE SCHEDULE TIMER IS PROGRAMMED icon appears, will blink and one of FOR THE FIRST TIME icons might be displayed but all other fields remain blank, indicating that...
  • Page 258 SA Indoor Unit SiBE121135 If the action and the corresponding time are correct, Program mode is quit and depending on the choice you can proceed to the second schedule timer action. made, the programmed actions are saved for Monday This is done by pressing the button, the data is (and possibly Tuesday).
  • Page 259 SiBE121135 SA Indoor Unit 8. Troubleshooting I WANT TO DELETE ONE OR MORE PROGRAMMED ACTIONS The guidelines below might help to solve your Make sure you are not in program mode ( problem. If you cannot remedy the problem, consult blinking);...

  • Page 260: Part 6 Service Diagnosis

    SiBE121135 Part 6 Service Diagnosis 1. Troubleshooting with LED ..............250 1.1 Indoor Unit....................250 1.2 Outdoor Unit ..................252 2. Problem Symptoms and Measures .............253 3. Service Check Function ..............254 3.1 RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series..................254 3.2 SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series .....263 4.
  • Page 261 SiBE121135 7.4 Unspecified Voltage (between Indoor Unit and Outdoor Unit) / Anti-icing Function in Other Rooms............301 7.5 Anti-icing Function................302 7.6 Outdoor Unit PCB Abnormality.............304 7.7 OL Activation (Compressor Overload) ..........305 7.8 Compressor Lock .................306 7.9 DC Fan Lock ..................307 7.10 Input Overcurrent Detection ..............308 7.11 Discharge Pipe Temperature Control...........309 7.12 High Pressure Control in Cooling ............310 7.13 Compressor Sensor System Abnormality ..........311...

  • Page 262: Troubleshooting With Led

    Troubleshooting with LED SiBE121135 1. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.
  • Page 263 SiBE121135 Troubleshooting with LED Floor Standing Type: FVXS Series Floor / Ceiling Suspended Dual Type Operation lamp (green) (R11688) Operation lamp (green) (R11687) Duct Connected Type Operation lamp (green) (Q0340) BRC1D528 BRC1E52A7, BRC1E52B7 Operation lamp (red) Operation lamp (green) (R12851) The error or warning message also blinks on the basic screen.

  • Page 264: Outdoor Unit

    Troubleshooting with LED SiBE121135 Outdoor Unit The outdoor unit has one green LED (LED A) on the PCB. When the LED A blinks, the microcomputer works in order. Service monitor PCB LED A LED A LED 1 LED 1 LED 2 LED 2 LED 3 LED 3...

  • Page 265: Problem Symptoms And Measures

    SiBE121135 Problem Symptoms and Measures 2. Problem Symptoms and Measures Problem Symptom Check Item Details of Measure Reference Page None of the units operates. Check the power supply. Check if the rated voltage is supplied. — Check the types of the indoor units. Check if the indoor unit type is compatible with —...

  • Page 266: Service Check Function

    Service Check Function SiBE121135 3. Service Check Function RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series 3.1.1 ARC466 Series Remote Controller 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen.
  • Page 267 SiBE121135 Service Check Function Check Method 2 1. Press the center of the [Temp] button and the [Mode] button at the same time. (R11669) 5C is displayed on the LCD. (R11821) 2. Select 5C (service check) with the [Temp] button. 3.
  • Page 268 Service Check Function SiBE121135 5. Diagnose by the sound. beep : The left-side number does not correspond with the error code. tow consecutive beeps : The left-side number corresponds with the error code but the right-side number does not. long beep : Both the left-side and right-side numbers correspond with the error code. The numbers indicated when you hear the long beep are the error code.
  • Page 269 SiBE121135 Service Check Function 3.1.2 ARC452 Series Remote Controller 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen. Timer cancel button < ARC452 Series > (R14554) 2.
  • Page 270 Service Check Function SiBE121135 Check Method 2 1. Press the 3 buttons ([TEMP] , [TEMP] , [MODE]) at the same time to enter the diagnosis mode. (R8381) The left-side number blinks. (R8382) 2. Press the [TEMP] button and change the number until you hear the two consecutive beeps or the long beep.
  • Page 271 SiBE121135 Service Check Function 5. Press the [TEMP] button and change the number until you hear the long beep. (R8383) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not.
  • Page 272 Service Check Function SiBE121135 3.1.3 ARC433 Series Remote Controller 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen. Timer cancel button < ARC433 Series > (R14555) 2.
  • Page 273 SiBE121135 Service Check Function Check Method 2 1. Press the center of the [TEMP] button and the [MODE] button at the same time to enter the diagnosis mode. (R4272) The left-side number blinks. (R14967) 2. Press the [TEMP] button and change the number until you hear the two consecutive beeps or the long beep.
  • Page 274 Service Check Function SiBE121135 5. Press the [TEMP] button and change the number until you hear the long beep. (R4277) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not.

  • Page 275: Sa Indoor Unit - Fcqg, Ffq, Fhq, Fdbq, Fbq Series

    SiBE121135 Service Check Function SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series 3.2.1 Relations between Modes BRC1D528 The following modes can be selected by using the [Inspection / Test] button on the remote controller. Press the [INSPECTION/TEST OPERATION] button for more Service data can be obtained.
  • Page 276 Service Check Function SiBE121135 BRC1E52A7, BRC1E52B7 <Main Menu> • Set temp. mode changeover • Airflow direction • Quick Cool/Heat On/Off • Ventilation • Timer setting • Service Contact/Model Info • Convenient functions • Setting status list • Clock setting Main Menu screen •...
  • Page 277 SiBE121135 Service Check Function 3.2.2 BRC1D528 If operation stops due to malfunction, the operation lamp on the remote controller blinks, and error code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when inspection mode is entered.) The error code enables you to tell what kind of malfunction caused operation to stop.
  • Page 278 Service Check Function SiBE121135 3.2.3 BRC1E52A7, BRC1E52B7 The following display appears on the screen when a error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp [Menu/Enter] button (R17163) (1) Check if it is error or warning.

  • Page 279: Code Indication On Remote Controller

    SiBE121135 Code Indication on Remote Controller 4. Code Indication on Remote Controller RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Error Codes Description Reference Page Normal condition — Indoor unit PCB abnormality Freeze-up protection control or heating peak-cut control DC motor (wall, floor standing) Fan motor or related abnormality AC motor (floor / ceiling, duct)

  • Page 280: Sub Codes For Sa Indoor Unit

    Code Indication on Remote Controller SiBE121135 Sub Codes for SA Indoor Unit If an error code like the one shown below is displayed when the navigation remote controller (BRC1E52A7, BRC1E52B7) is in use, make a detailed diagnosis or a diagnosis of the relevant unit referring to the attached list.

  • Page 281: Outdoor Unit

    SiBE121135 Code Indication on Remote Controller Outdoor Unit : ON, : OFF, : Blinks Green : Blinks in normal condition Red : OFF in normal condition Outdoor Unit LED Indication Error Codes Description Reference Page Green h 00 Normal condition —...

  • Page 282: Troubleshooting For Ra Indoor Unit - Ftxg, Ftxs, Ctxs, Fvxg, Fvxs, Flxs, Fdxs Series

    Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series SiBE121135 5. Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Indoor Unit PCB Abnormality Remote Controller Display Method of The system checks if the circuit works properly within the microcomputer of the indoor unit. Malfunction Detection Malfunction...
  • Page 283 SiBE121135 Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the combination of the indoor and outdoor unit.

  • Page 284: Freeze-Up Protection Control Or Heating Peak-Cut Control

    Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series SiBE121135 Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display Method of Freeze-up protection control Malfunction During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor.
  • Page 285 SiBE121135 Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged.

  • Page 286: Fan Motor Or Related Abnormality

    Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series SiBE121135 Fan Motor or Related Abnormality 5.3.1 DC Motor (Wall Mounted Type, Floor Standing Type) Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation.
  • Page 287 SiBE121135 Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Troubleshooting FTXG, FTXS-J, FTXS-G, FVXG, FVXS Series Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.02 Turn off the power supply Refer to P.326...
  • Page 288 Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series SiBE121135 Troubleshooting FTXS-K, CTXS-K Series Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.03 Note: The motor may break when the Turn off the power.
  • Page 289 SiBE121135 Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series 5.3.2 AC Motor (Duct Connected Type, Floor / Ceiling Suspended Dual Type) Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation.

  • Page 290: Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve (Motor Operated Valve) Abnormality, Freeze-Up Protection Control (Fvxg Series Only)

    Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series SiBE121135 Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve (Motor Operated Valve) Abnormality, Freeze-up Protection Control (FVXG Series Only) Remote Controller Display Method of Radiant panel temperature rise During RADIANT operation, high temperature control (e.g., operation halt, indoor electronic Malfunction expansion valve closure) is activated according to the temperature detected by the radiant...
  • Page 291 SiBE121135 Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 ∗ When the outdoor temperature is below the Check the operation condition.

  • Page 292: Thermistor Or Related Abnormality (Ra Indoor Unit)

    Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series SiBE121135 Thermistor or Related Abnormality (RA Indoor Unit) C4, C9, CE Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction...

  • Page 293: Front Panel Open / Close Fault (Ftxg Series Only)

    SiBE121135 Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Front Panel Open / Close Fault (FTXG Series Only) Remote Controller Display Method of Malfunction Detection Malfunction If the error repeats, the system is shut down. Decision Conditions Supposed...

  • Page 294: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series SiBE121135 Signal Transmission Error (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is Malfunction checked whether it is normal.

  • Page 295: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiBE121135 Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Unspecified Voltage (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the Malfunction indoor / outdoor transmission signal.

  • Page 296: Troubleshooting For Sa Indoor Unit - Fcqg, Ffq, Fhq, Fdbq, Fbq Series

    Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series SiBE121135 6. Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series Indoor Unit PCB Abnormality Remote Controller Display Method of The system checks the data from EEPROM. Malfunction Detection Malfunction...

  • Page 297: Drain Water Level System Abnormality

    SiBE121135 Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series Drain Water Level System Abnormality Remote Controller Display Method of The float switch detects error. Malfunction Detection Malfunction When the water level reaches its upper limit and when the float switch turns OFF Decision Conditions Supposed...
  • Page 298 Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series SiBE121135 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the unit a ceiling suspended type? Is the optional drain raising mechanism connected?

  • Page 299: Fan Motor Or Related Abnormality

    SiBE121135 Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series Fan Motor or Related Abnormality Remote Controller Display Method of The signal from the fan motor detects abnormal fan speed. Malfunction Detection Malfunction When the fan rotations are not detected while the output voltage to the fan is at its maximum Decision Conditions Supposed...
  • Page 300 Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series SiBE121135 Troubleshooting FHQ Series Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the connections of X20A and X26A.

  • Page 301: Swing Motor Lock (Fhq Series Only)

    SiBE121135 Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series Swing Motor Lock (FHQ Series Only) Remote Controller Display Method of The error is detected by the limit switch when the motor turns. Malfunction Detection Malfunction When the ON/OFF micro-switch for position detection cannot be reversed even though the Decision swing motor is energized for a specified amount of time (about 30 seconds).

  • Page 302: Drain System Abnormality

    Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series SiBE121135 Drain System Abnormality Remote Controller Display Method of Water leakage is detected based on the float switch ON/OFF changeover while the compressor is not operating. Malfunction Detection Malfunction When the float switch changes from ON to OFF while the compressor is OFF Decision...

  • Page 303: Thermistor Or Related Abnormality (Sa Indoor Unit)

    SiBE121135 Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series Thermistor or Related Abnormality (SA Indoor Unit) C4, C9 Remote Controller Display Method of The temperatures detected by the thermistors determine thermistor errors. Malfunction Detection Malfunction The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Decision Conditions Supposed...

  • Page 304: Remote Controller Thermistor Abnormality

    Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series SiBE121135 Remote Controller Thermistor Abnormality Remote Controller Display Method of Even if remote controller thermistor is faulty, system is possible to operate by system thermistor. Malfunction detection is carried out by the temperature detected by remote controller thermistor. Malfunction Detection Malfunction...

  • Page 305: Signal Transmission Error

    SiBE121135 Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series Signal Transmission Error (between Indoor Unit and Remote Controller) Remote Controller Display Method of Microcomputer checks if transmission between indoor unit and remote controller is normal. Malfunction Detection Malfunction Normal transmission does not continue for specified period.

  • Page 306: Signal Transmission Error

    Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series SiBE121135 Signal Transmission Error (between MAIN Remote Controller and SUB Remote Controller) Remote Controller Display Method of In case of controlling with 2 remote controllers, check the system using micro-computer if signal Malfunction transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 307: Field Setting Abnormality

    SiBE121135 Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series 6.10 Field Setting Abnormality Remote Controller Display Method of Malfunction Detection Malfunction Incorrect field setting Decision Conditions Supposed Defective indoor unit PCB Causes Defective outdoor unit PCB Defective power supply PCB Indoor-outdoor, indoor-indoor unit transmission wiring Defective remote controller wiring...

  • Page 308: Troubleshooting For Outdoor Unit

    Troubleshooting for Outdoor Unit SiBE121135 7. Troubleshooting for Outdoor Unit Refrigerant Shortage Remote Controller Display Outdoor Unit LED Display Method of Refrigerant shortage detection I : Malfunction Refrigerant shortage is detected by checking the input current value and the compressor output frequency.
  • Page 309 SiBE121135 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.325 Any thermistor Replace the thermistor(s) disconnected? ∗ Discharge pipe thermistor position.

  • Page 310: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting for Outdoor Unit SiBE121135 Low-voltage Detection or Over-voltage Detection Remote Controller Display Outdoor Unit LED Display Method of Indoor Unit Malfunction The zero-cross detection of the power supply is evaluated by the indoor unit PCB. Detection Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit.
  • Page 311 SiBE121135 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Voltage as rated? Correct the power supply. Check the connection of the compressor harness.

  • Page 312: Signal Transmission Error (On Outdoor Unit Pcb)

    Troubleshooting for Outdoor Unit SiBE121135 Signal Transmission Error (on Outdoor Unit PCB) Remote Controller Display Outdoor Unit LED Display Method of Communication error between microcomputer mounted on the main PCB and PM1. Malfunction Detection Malfunction The abnormality is determined when the data sent from the PM1 can not be received for 9 Decision seconds.

  • Page 313: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiBE121135 Troubleshooting for Outdoor Unit Unspecified Voltage (between Indoor Unit and Outdoor Unit) / Anti-icing Function in Other Rooms UA, UH Remote Controller Display Outdoor Unit LED Display Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the Malfunction microcomputer.

  • Page 314: Anti-Icing Function

    Troubleshooting for Outdoor Unit SiBE121135 Anti-icing Function Remote Controller Display Outdoor Unit LED Display Method of During cooling operation, indoor unit icing is detected by checking the temperatures sensed by Malfunction the indoor heat exchanger thermistor and room temperature thermistor that are located in a shut-down room.
  • Page 315 SiBE121135 Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.325 Check the wiring and piping. Check No.12 Wrong wiring or Activate the wiring error check piping? Refer to P.329...

  • Page 316: Outdoor Unit Pcb Abnormality

    Troubleshooting for Outdoor Unit SiBE121135 Outdoor Unit PCB Abnormality Remote Controller Display Outdoor Unit LED Display Method of Detect within the program of the microcomputer. Malfunction Detection Malfunction The program of the microcomputer is in abnormal running order. Decision Conditions Supposed Defective outdoor unit PCB Causes...

  • Page 317: Ol Activation (Compressor Overload)

    SiBE121135 Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Remote Controller Display Outdoor Unit LED Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the error repeats, the system is shut down. Decision Reset condition: Continuous run for about 60 minutes without any other error ∗...

  • Page 318: Compressor Lock

    Troubleshooting for Outdoor Unit SiBE121135 Compressor Lock Remote Controller Display Outdoor Unit LED Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction Judging from the current waveform generated when high-frequency voltage is applied to the Decision compressor.

  • Page 319: Dc Fan Lock

    SiBE121135 Troubleshooting for Outdoor Unit DC Fan Lock Remote Controller Display Outdoor Unit LED Display Method of An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Malfunction Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. Decision If the error repeats, the system is shut down.

  • Page 320: Input Overcurrent Detection

    Troubleshooting for Outdoor Unit SiBE121135 7.10 Input Overcurrent Detection Remote Controller Display Outdoor Unit LED Display Method of Detected by checking the input current value Malfunction Detection Malfunction The input current is at a certain value (depending on the condition) for 2.5 seconds. Decision The compressor halts if the error occurs, and restarts automatically after 3-minute standby.

  • Page 321: Discharge Pipe Temperature Control

    SiBE121135 Troubleshooting for Outdoor Unit 7.11 Discharge Pipe Temperature Control Remote Controller Display Outdoor Unit LED Display Method of Detected by the discharge pipe thermistor Malfunction Detection Malfunction If the temperature detected by the discharge pipe thermistor rises above °C, the Decision compressor stops.

  • Page 322: High Pressure Control In Cooling

    Troubleshooting for Outdoor Unit SiBE121135 7.12 High Pressure Control in Cooling Remote Controller Display Outdoor Unit LED Display Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling mode if the Malfunction temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Malfunction The temperature sensed by the outdoor heat exchanger thermistor rises above about...

  • Page 323: Compressor Sensor System Abnormality

    SiBE121135 Troubleshooting for Outdoor Unit 7.13 Compressor Sensor System Abnormality Remote Controller Display Outdoor Unit LED Display Method of Fault condition is identified by the supply voltage and the DC voltage which is detected Malfunction before the compressor startup. Fault condition is identified by the compressor current which is detected right after the Detection compressor startup.
  • Page 324 Troubleshooting for Outdoor Unit SiBE121135 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Reactor connection check Connection OK? Connect the reactor properly. Compressor connection check Connect the compressor Connection OK? properly.

  • Page 325: Position Sensor Abnormality

    SiBE121135 Troubleshooting for Outdoor Unit 7.14 Position Sensor Abnormality Remote Controller Display Outdoor Unit LED Display Method of A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction If the error repeats, the system is shut down. Reset condition: Continuous run for about 5 minutes without any other error Decision Conditions...
  • Page 326 Troubleshooting for Outdoor Unit SiBE121135 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.331 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.333 Voltage as rated? Correct the power supply.

  • Page 327: Ct Or Related Abnormality

    SiBE121135 Troubleshooting for Outdoor Unit 7.15 CT or Related Abnormality Remote Controller Display Outdoor Unit LED Display Method of A CT or related error is detected by checking the compressor running frequency and CT- Malfunction detected input current. Detection Malfunction The compressor running frequency is more than Hz and input current is less than Decision...
  • Page 328 Troubleshooting for Outdoor Unit SiBE121135 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Turn off the power and turn it on Refer to P.331 again. Check No.21 Start operation.

  • Page 329: Thermistor Or Related Abnormality (Outdoor Unit)

    SiBE121135 Troubleshooting for Outdoor Unit 7.16 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6, J8, J9, P4 Remote Controller Display Outdoor Unit LED 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 sensed by each thermistor.
  • Page 330 Troubleshooting for Outdoor Unit SiBE121135 Troubleshooting In case of Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn on the power again. Refer to P.325 Error displayed Reconnect the connectors again on remote or thermistors.

  • Page 331: Electrical Box Temperature Rise

    SiBE121135 Troubleshooting for Outdoor Unit 7.17 Electrical Box Temperature Rise Remote Controller Display Outdoor Unit LED 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 °C.
  • Page 332 Troubleshooting for Outdoor Unit SiBE121135 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 WARNING Turn off the power and turn it on Refer to P.333 again. To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises...

  • Page 333: Radiation Fin Temperature Rise

    SiBE121135 Troubleshooting for Outdoor Unit 7.18 Radiation Fin Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature with the Malfunction compressor on. Detection Malfunction The radiation fin temperature with the compressor on is above °C.
  • Page 334 Troubleshooting for Outdoor Unit SiBE121135 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 Refer to P.333 Turn off the power and turn it on again to start the system. Check No.19 Refer to P.334 Has the PCB been...

  • Page 335: Output Overcurrent Detection

    SiBE121135 Troubleshooting for Outdoor Unit 7.19 Output Overcurrent Detection Remote Controller Display Outdoor Unit LED Display Method of An output overcurrent 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. Decision A speed error occurs while the compressor is running.
  • Page 336 Troubleshooting for Outdoor Unit SiBE121135 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output Refer to P.331 overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 337: Check

    SiBE121135 Check 8. Check Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graphs below.

  • Page 338: Fan Motor Connector Check

    Check SiBE121135 Fan Motor Connector Check Check No.02 FTXG, FTXS-J, FTXS-G, FVXG, FVXS Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 4 - 7). 3. Check motor control voltage (pins 4 - 3). 4.

  • Page 339: Hall Ic Check

    SiBE121135 Check Hall IC Check Check No.04 FLXS, FDXS Series 1. Check the connector connection. 2. With the power on, operation off, and the connector connected, check the following. ∗Output voltage of about 5 V between pins 1 and 3. ∗Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.

  • Page 340: Power Supply Waveform Check

    Check SiBE121135 Power Supply Waveform Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check the waveform disturbance. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] [Fig.2]...

  • Page 341: Outdoor Electronic Expansion Valve Check

    SiBE121135 Check Outdoor Electronic Expansion Valve Check Check No.12 Conduct the followings to check the outdoor electronic expansion valve (EV). 1. Check to see if the EV connector is correctly inserted in the PCB. Match the EV unit number and the connector number. 2.

  • Page 342: Four Way Valve Performance Check

    Check SiBE121135 Four Way Valve Performance Check Check No.13 Turn off the power and turn it on again. ∗ Four way valve coil Start heating operation. Cooling / Dry : No continuity Heating : Continuity S80 voltage at 220 - 240 Replace the outdoor unit VAC with compressor PCB.

  • Page 343: Inverter Checker" Check

    SiBE121135 Check “Inverter Checker” Check Check No.15 Characteristics If abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (control PCB, power module, etc.).

  • Page 344: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiBE121135 Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. (3) If NG in Check No.22, replace the power module.

  • Page 345: Installation Condition Check

    SiBE121135 Check 8.11 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.

  • Page 346: Outdoor Fan System Check

    Check SiBE121135 8.13 Outdoor Fan System Check Check No.19 Check the outdoor unit fan system. Fan motor lead wire Outdoor unit fan running? Reconnect the connector. connector disconnected? Outdoor unit fan system Go to Check No. 16. functioning. (R15128) 8.14 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit.

  • Page 347: Power Module Check

    SiBE121135 Check 8.15 Power Module Check Check No.22 Note: Check to make sure that the voltage between (+) and (–) of the power module (PM1) is approx. 0 V before checking. Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.

  • Page 348: Part 7 Removal Procedure

    SiBE121135 Part 7 Removal Procedure 1. Outdoor Unit: 40-75 Class..............337 1.1 Removal of Outer Panels ..............337 1.2 Removal of Electrical Box ..............341 1.3 Removal of PCBs .................349 1.4 Removal of Outdoor Fan / Fan Motor...........354 1.5 Removal of Sound Blankets ..............356 1.6 Removal of Coils / Thermistors ............360 1.7 Removal of Distributor................363 1.8 Removal of Four Way Valve..............364...

  • Page 349: Outdoor Unit: 40-75 Class

    SiBE121135 Outdoor Unit: 40-75 Class 1. Outdoor Unit: 40-75 Class Note: The illustrations are for heat pump models as representative. Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
  • Page 350 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Remove the 6 screws Front panel of the front panel. (R17165) Remove the screw of the shield plate. Shield plate (R11204) Slide the shield plate to the left to unfasten the hooks and remove the shield plate.
  • Page 351 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points Lift the front panel up to unfasten the left side hooks. (R5501) The front panel has 3 hooks on the left. Hook (R12901) Unfasten the right side hook and remove the Hook front panel.
  • Page 352 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Remove the 4 screws of the discharge grille. Discharge grille (R12902) Remove the 2 screws of the stop valve cover. Stop valve cover (R11206) Slide the stop valve cover downward and remove it. (R5506) When reassembling, make sure to fit the 5 hooks.

  • Page 353: Removal Of Electrical Box

    SiBE121135 Outdoor Unit: 40-75 Class Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Disconnect the The illustrations are for 3- harnesses.
  • Page 354 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Detach the fixing tape Fixing of the electrical box tape cover. (R5512) Unfasten the 4 hooks at mark of the electrical box cover. (R5513) Lift the electrical box cover up and remove it. (R5514) Detach the clamp and When reassembling, insert...
  • Page 355 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points Release the fan motor lead wire from the Fan motor lead wire hooks. (R17168) (R5518) Disconnect the [S20] (white) : room A connectors for the [S21] (red) : room B [S20] [S21] [S22] electronic expansion [S22] (blue) : room C...
  • Page 356 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Disconnect the [S40] connector for the overload protector [S40]. (R5521) 10 The wire harness for the compressor is attached to the partition plate by the clamp. Partition plate Clamp (R12904) 11 Pull out the clamp with pliers.
  • Page 357 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points Disconnect the each [S90] : Thermistors [S90] [S92] [S93] connector. [S92] : Gas pipe thermistors [S93] : Liquid pipe thermistors (R5523) When reassembling, insert each clamp of the thermistor harnesses into the holes as below.
  • Page 358 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points The figure shows the arrangement of the wire harnesses under the electrical box. (R5527) When reassembling, insert Pull out the clamp of the the clamp into the small hole. Thermistor lead wire thermistor lead wire.
  • Page 359 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points (R11180) Remove the 2 screws and remove the wiring fixture. Wiring fixture (R11181) Detach the outdoor temperature thermistor. (R5533) Remove the screw on the right side of the electrical box. (R17258) Removal Procedure...
  • Page 360 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Remove the screw of the electrical box. (R17259) Lift up and remove the electrical box. (R5536) Removal Procedure...

  • Page 361: Removal Of Pcbs

    SiBE121135 Outdoor Unit: 40-75 Class Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the service Service monitor PCB Terminal board monitor PCB.
  • Page 362 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Unfasten the upper hook and pull the service monitor PCB upward to remove. (R5541) Refer to page 40 for detail. (R5542) 2. Remove the main PCB. [AC1] [AC2] [AC1] [AC2] : for power supply Disconnect the [S10] brown...
  • Page 363 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points Unfasten the 3 hooks on the reactor side and slide the main PCB to the left. (R5547) Release the relay harness for the compressor from the hook. (R5548) Lift up the main PCB In working, be careful not to and remove it.
  • Page 364 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Refer to page 39 for detail. [S70] [S40] [S20] [S21] [S22] [S80] [S93] [S90] (R17260) [S92] Remove the 2 screws of the radiation fin. Clamp for reactor harness (R11207) When reassembling, make sure to use the silicon grease.
  • Page 365 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points 3. Remove the terminal board. Disconnect all the wire harnesses from the back of the terminal board. Terminal board (back) (R12907) (R5556) Unfasten the hook of the electrical box and remove the terminal board.

  • Page 366: Removal Of Outdoor Fan / Fan Motor

    Outdoor Unit: 40-75 Class SiBE121135 Removal of Outdoor Fan / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws Preparation of the fan motor fixing Remove the outer panels plate.
  • Page 367 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points Open the 2 hooks and When reassembling, put the release the fan motor fan motor lead wire through lead wire. the back of the fan motor so as not to be entangled with the outdoor fan.

  • Page 368: Removal Of Sound Blankets

    Outdoor Unit: 40-75 Class SiBE121135 Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side Preparation panel. Remove the outer panels Right side panel and plates.
  • Page 369 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points Lift up and remove the right side panel. (R5573) 2. Remove the partition Partition plate plate. Remove the 2 screws of the partition plate. (R5575) Detach the clamp of the relay harness for the compressor.
  • Page 370 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Lift up and remove the partition plate. (R5580) When reassembling, make sure to fit the lower hook of the partition plate. (R5577) 3. Remove the sound Since the piping ports on the blankets.
  • Page 371 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points Open the sound blanket (outer) and pull it out. Sound blanket (outer) (R5583) Open the sound blanket (inner) and pull it out. Sound blanket (inner) (R5584) Removal Procedure...

  • Page 372: Removal Of Coils / Thermistors

    Outdoor Unit: 40-75 Class SiBE121135 Removal of Coils / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the electronic expansion valve coils. Pull out the electronic expansion valve coils.
  • Page 373 SiBE121135 Outdoor Unit: 40-75 Class Step Procedure Points 3. Remove the thermistors. When reassembling, meet the edge of the thermistor Open the putty and and the fixture. remove the liquid pipe thermistors. Liquid pipe thermistor (R11184) Pull out the gas pipe thermistors.
  • Page 374 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Remove the discharge When reassembling, meet pipe thermistor. the edge of the thermistor Clip and the fixture. Discharge pipe thermistor (R11185) Remove the assembly of thermistors. Connector Outdoor temperature thermistor Outdoor heat exchanger thermistor Discharge pipe...

  • Page 375: Removal Of Distributor

    SiBE121135 Outdoor Unit: 40-75 Class Removal of Distributor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the putty. Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.

  • Page 376: Removal Of Four Way Valve

    Outdoor Unit: 40-75 Class SiBE121135 Removal of Four Way Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Before working, make Cooling only models have no sure that the refrigerant four way valve coil.

  • Page 377: Removal Of Compressor

    SiBE121135 Outdoor Unit: 40-75 Class Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Terminal cover (R12914) Disconnect the compressor lead wires.
  • Page 378 Outdoor Unit: 40-75 Class SiBE121135 Step Procedure Points Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine. Warning If the refrigerant gas leaks during work, ventilate the room.

  • Page 379: Outdoor Unit: 80/90 Class

    SiBE121135 Outdoor Unit: 80/90 Class 2. Outdoor Unit: 80/90 Class Note: The illustrations are for heat pump models as representative. Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
  • Page 380 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Slide the suction grille Hook downward to unfasten the 3 top hooks. (R14613) Remove the suction grille. (R6372) 2. Remove the top panel. Top panel Remove the 4 screws on the back and the screw on the left side panel.
  • Page 381 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Remove the 2 screws on the front and the screw on the right side panel. Right side panel (R6374) Lift the top panel and remove it. (R6375) 3. Remove the right side panel.
  • Page 382 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Slide the right side panel downward to unfasten the 2 hooks on the back side. (R6377) Hook (R14614) Hook (R14615) Removal Procedure...
  • Page 383 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Remove the right side panel. (R10441) 4. Remove the front panel This screw is M5 × 16 (2). Front Panel (2) Remove the 2 screws. Front Panel (1) (R10629) Removal Procedure...
  • Page 384 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Slide the front panel (2) downward to unfasten the hook. (R10374) (R6383) Remove the front panel (2). (R10375) Removal Procedure...
  • Page 385 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points 5. Remove the front panel Remove the discharge grille (1). and outdoor fan first to remove the front panel (1). Remove the 4 screws on the discharge grille. Front Panel (1) Discharge grille (R10376) Pull the bottom of the discharge grille.
  • Page 386 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Slide the discharge grille downward to unfasten the 2 hooks at the top. Hook (R17173) Remove the discharge grille. (R10380) Remove the nut and Nut size : M8 remove the outdoor fan. 13 mm Outdoor fan (R12301)
  • Page 387 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Remove the 2 screws on the partition plate Partition plate (1) (1). (R10382) Remove the screw at the bottom left of the front panel (1). (R10383) Remove the screw at the bottom of the left side.
  • Page 388 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Remove the screw at the bottom of the back side. (R6394) The front panel (1) has a hook. Lift the front panel (1). Hook (R17174) Remove the front panel (1). (R10385) Be sure to detach the front panel (1) carefully so as not to deform it.
  • Page 389 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points 6. Remove the rear panel. Remove the screw on the partition plate (2). Rear panel Partition plate (2) (R11209) Slide the partition plate (2) to the left and remove it. (R11211) Removal Procedure...
  • Page 390 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Remove the 5 screws on the wire fixing plate (upper). Wire fixing plate (upper) (R11210) Remove the wire fixing plate (upper). (R11213) Remove the 3 screws on the wire fixing plate (lower). Wire fixing plate (lower) (R11214)
  • Page 391 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Remove the wire fixing plate (lower). (R11215) Pull out the holder of The holder is secured in the the outdoor clearances of the outdoor temperature thermistor. heat exchanger fins. Outdoor temperature thermistor (R10388) Release the thermistor wire from the groove...
  • Page 392 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Remove the 3 screws on the rear panel. (R10390) Remove the screw on the bottom frame. (R10391) Remove the screw on the stop valve mounting plate. Stop valve mounting plate (R10392) Removal Procedure...
  • Page 393 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Lift the rear panel upward to unfasten the 2 hooks. Hook Hook (R12918) Remove the rear panel. (R10394) Removal Procedure...

  • Page 394: Removal Of Electrical Box

    Outdoor Unit: 80/90 Class SiBE121135 Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws to detach the earth wires.
  • Page 395 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Disconnect the Pull out the clamp. connector for the four The cooling only model has [S80] way valve coil [S80]. no harness for [S80]. Clamp (R11187) Disconnect the Pull out the clamp. connectors for the 5-room models also has electronic expansion...
  • Page 396 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Disconnect the Pull out the clamp. [S92] connector for the gas When reassembling, insert pipe thermistor [S92]. the clamp into the small hole. [S92] Clamp (R17267) (R10537) Disconnect the Pull out the clamp. connector for the thermistors [S90].
  • Page 397 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Disconnect the connector for the [S40] overload protector [S40]. (R10539) The wire harness for the compressor is attached to the partition plate (1) by the clamp. Partition plate Clamp (R12904) Pull out the clamp with pliers.
  • Page 398 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Disconnect the relay connector of the compressor. (R6469) Remove the screw on the stop valve mounting Electrical box plate. Stop valve mounting plate (R10395) Remove the screw on the partition plate (1). Partition plate (1) (R6411) Removal Procedure...
  • Page 399 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Slide the electrical box leftward to unfasten the hook on the right side of the electrical box. Hook (R10401) Lift up the electrical box and remove it. (R10402) Removal Procedure...

  • Page 400: Removal Of Pcbs

    Outdoor Unit: 80/90 Class SiBE121135 Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the main PCB. Hook Remove the cover of Release the 4 hooks.
  • Page 401 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Disconnect the [S51] [S101] : service V(yellow) W(blue) U(red) [S51] [S101] connectors. monitor PCB [S10] [S10] : terminal board [HR2](blue) (transmission) [AC2] [HR1](white) (blue) [HR1] [HR2] : reactor [AC1] [AC1] [AC2] : terminal board (brown) (power supply) [U] [V] [W] : compressor...
  • Page 402 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points 3. Remove the service monitor PCB. [S102] Disconnect the connectors [S52] [S102] from the service monitor PCB. [S52] Service monitor PCB (R10410) Slightly lift the top hook to detach. (R6436) Unfasten the bottom Refer to page 40 for detail.
  • Page 403 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points 4. Remove the terminal board. Remove the screw. Terminal board (R10411) Unfasten the hook. (R10412) Remove the terminal board. (R10413) Removal Procedure...

  • Page 404: Removal Of Fan Motor

    Outdoor Unit: 80/90 Class SiBE121135 Removal of Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points (R10414) Remove the 2 lower Be sure to remove the lower screws of the fan motor.

  • Page 405: Removal Of Coils / Thermistors

    SiBE121135 Outdoor Unit: 80/90 Class Removal of Coils / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the electronic expansion valve coils. Pull out the electronic expansion valve coils.
  • Page 406 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points 2. Remove the thermistors. Pull out the gas pipe thermistors. Gas pipe thermistors (R10416) Gas pipe thermistor (R6448) Removal Procedure...
  • Page 407 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Peel off the putty and pull out the liquid pipe thermistors. Liquid pipe thermistors (R10417) Liquid pipe thermistor (R6450) Pull out the outdoor heat exchanger Outdoor heat exchanger thermistor. thermistor (R10541) Removal Procedure...
  • Page 408 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Remove the clip from Be careful not to lose the the outdoor heat clip. exchanger thermistor. Clip (R6452) Slightly open the sound blanket (outer). Sound blanket (outer) (R10418) Remove the sound blanket (top upper). Sound blanket (top upper) (R10419) Removal Procedure...
  • Page 409 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Remove the discharge pipe thermistor. Discharge pipe thermistor (R10420) Remove the fixture. Fixture (R10430) 3. Remove the four way valve coil. Remove the screw. (R10431) Removal Procedure...
  • Page 410 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Remove the four way valve coil. Four way valve coil (R10432) Removal Procedure...

  • Page 411: Removal Of Sound Blankets

    SiBE121135 Outdoor Unit: 80/90 Class Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the sound blanket (outer). Sound blanket (outer) (R10433) Remove the sound The sound blanket is fragile.
  • Page 412 Outdoor Unit: 80/90 Class SiBE121135 Step Procedure Points Remove the sound The sound blanket is fragile. blanket (outer). Sound blanket (outer) (R10436) Remove the sound The sound blanket is fragile. blanket (top inner). Carefully pass the blanket through the discharge pipe. Sound blanket (top inner) (R10437) Open the sound blanket...
  • Page 413 SiBE121135 Outdoor Unit: 80/90 Class Step Procedure Points Remove the sound blanket (inner). (R10439) Removal Procedure...

  • Page 414: Removal Of Compressor

    Outdoor Unit: 80/90 Class SiBE121135 Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Terminal cover (R6466) Disconnect the U : red, V : yellow, W : blue U(red) compressor lead wires.

  • Page 415: Part 8 Trial Operation And Field Settings

    SiBE121135 Part 8 Trial Operation and Field Settings 1. Pump Down Operation................404 2. Forced Operation ................405 3. Wiring Error Check Function ...............406 4. Trial Operation ..................408 4.1 RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series..................408 4.2 SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series .....410 5.

  • Page 416: Pump Down Operation

    Pump Down Operation SiBE121135 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation.

  • Page 417: Forced Operation

    SiBE121135 Forced Operation 2. Forced Operation Outline Forced operation mode includes forced cooling and forced heating. Operation mode can be selected by the operation mode switch (SW2) on the outdoor unit. Press the forced operation [ON/OFF] switch (SW1) on the outdoor unit to start the operation. Detail Item Forced Cooling...

  • Page 418: Wiring Error Check Function

    Wiring Error Check Function SiBE121135 3. Wiring Error Check Function Outline The convenient wiring error check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch that is behind the stop valve cover of the outdoor unit.
  • Page 419 SiBE121135 Wiring Error Check Function Basic Knowledge Refrigerant flows from Port A and on. The temperatures of the indoor heat exchanger thermistors are detected one by one to check up the matching between the piping and wiring. With this function on, freezing (crackling) noise may be heard from the indoor unit. This is not a problem.

  • Page 420: Trial Operation

    Trial Operation SiBE121135 4. Trial Operation RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series Outline 1. Measure the power supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating operation. 3.
  • Page 421 SiBE121135 Trial Operation ARC452 Series (1) Press the [ON/OFF] button to turn on the system. (2) Press the both of [TEMP] buttons and the [MODE] button at the same time. (3) Press the [MODE] button twice. (T appears on the display to indicate that trial operation is selected.) (4) Press the [MODE] button and select the operation mode.

  • Page 422: Sa Indoor Unit - Fcqg, Ffq, Fhq, Fdbq, Fbq Series

    Trial Operation SiBE121135 SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series 4.2.1 Check points To carry out test operation, check the followings: Check that the temperature setting of the remote controller is at the lowest level in cooling mode.
  • Page 423 SiBE121135 Trial Operation BRC1E51A7 Step Action Remote controller Before test operation Turn on the power supply more than 6 hours before test operation. Open the gas stop valve. Open the liquid stop valve. How to activate test operation Press and hold the [Cancel] button ( ) for 4 seconds to enter the Field setting menu.

  • Page 424: Field Settings

    Field Settings SiBE121135 5. Field Settings Outdoor Unit 5.1.1 Priority Room Setting Outdoor electronic expansion valves are controlled to provide more capacity to the prioritized room. Setting method Turn off the circuit breaker before changing the setting. Only one room can be set as the priority room (By turning on one of the SW4 on the service monitor PCB of the outdoor unit).
  • Page 425 SiBE121135 Field Settings 5.1.2 COOL / HEAT Mode Lock Use the [S15] connector to set the unit to cooling only or heating only. Setting to heating only (H): Short-circuit pins 1 and 3 of the connector [S15]. Setting to cooling only (C): Short-circuit pins 3 and 5 of the connector [S15]. The following specifications apply to the connector housing and pins.
  • Page 426 Field Settings SiBE121135 5.1.3 NIGHT QUIET Mode If NIGHT QUIET mode is to be used, initial settings must be made when the unit is installed. Explain the function of NIGHT QUIET mode, as described below, to the customer, and confirm whether or not the customer wants to use NIGHT QUIET mode.

  • Page 427: Ra Indoor Unit - Ftxg, Ftxs, Ctxs, Fvxg, Fvxs, Flxs

    SiBE121135 Field Settings RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series 5.2.1 Model Type Setting ARC452A1, ARC452A3, ARC466A6 The remote controller is common to the heat pump model and cooling only model. Use the DIP switch on the remote controller to set the model type. Set the DIP switch as shown in the illustration.
  • Page 428 Field Settings SiBE121135 FTXS-J Series FTXS-G Series ADDRESS ADDRESS (R11735) EXIST (R12216) Floor Standing FVXG Series Type (1) Remove the front panel, air filters and front grille. (2) Remove the screw, and remove the service cover. Service cover (R14629) (3)Turn on the DIP switch [S2W-1] on the service PCB. Service PCB 1 2 3 4 (R14630)
  • Page 429 SiBE121135 Field Settings FVXS Series 1) Remove the front grille. 2) Lift the sensor PCB fixing plate and remove the front shield plate. 3) Disconnect the connectors [S1] [S41] [S42]. 4) Remove the electric box (1 screw). 5) Pull out the indoor heat exchanger thermistor. 6) Remove the shield plate (8 tabs).

  • Page 430: Jumper And Switch Settings

    Field Settings SiBE121135 Wireless Remote (1) Remove the cover and take it off. Controller (2) Cut the address setting jumper. ARC466 series ARC452 series Jumper Jumper ADDRESS EXIST ADDRESS EXIST (R12065) (R12037) ARC433 series Jumper ADDRESS EXIST (R6573) 5.2.3 Jumper and Switch Settings Jumper (on indoor Function When connected...

  • Page 431: Sa Indoor Unit - Fcqg, Ffq, Fhq, Fdbq, Fbq Series

    SiBE121135 Field Settings SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series 5.3.1 How to Change the Field Settings Outline If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual for each optional accessory. Wired remote BRC1D528 controller...
  • Page 432 Field Settings SiBE121135 BRC1E52A7, BRC1E52B7 (R12878) a Unit No. b First code No. c Second code No. d Mode Step Action Remote controller Press and hold the [Cancel] button ( for 4 seconds to enter the Field setting menu. Use the buttons to select Field setting list and push the [Menu/Enter] button ( (R12879)
  • Page 433 SiBE121135 Field Settings 5.3.2 Overview of the Field Settings First Second Code No. Mode Code Description of setting Ultra longlife Approx. Approx. filter 10,000 hrs. 5,000 hrs. Filter cleaning sign — — interval Approx. Approx. Longlife filter 2,500 hrs. 1,250 hrs. (20) Ultra longlife Longlife filter type...
  • Page 434 Field Settings SiBE121135 5.3.3 MAIN / SUB Setting when Using 2 Wired Remote Controllers Outline The MAIN / SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers (control panel and separate remote controller), set one to MAIN and the other to SUB.

  • Page 435: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    SiBE121135 Application of Silicon Grease to a Power Transistor and a Diode Bridge 6. Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board (PCB) 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 radiation fin) of the power transistor and diode bridge.

  • Page 436: Part 9 Appendix

    SiBE121135 Part 9 Appendix 1. Piping Diagrams..................425 1.1 Outdoor Unit ..................425 1.2 Indoor Unit....................430 2. Wiring Diagrams..................437 2.1 Outdoor Unit ..................437 2.2 Indoor Unit....................442 Appendix...

  • Page 437: Piping Diagrams

    SiBE121135 Piping Diagrams 1. Piping Diagrams Outdoor Unit 1.1.1 Cooling Only 3MKS50E3V1B OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE ELECTRONIC THERMISTOR ( DOA ) HEADER EXPANSION VALVE LIQUID PIPE THERMISTOR ( DLA ) 6.4CuT HEADER 9.5CuT ROOM A ( 6.4 CuT )
  • Page 438 Piping Diagrams SiBE121135 4MKS75F2V1B OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLA ) 6.4CuT HEADER 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLB ) 6.4CuT ROOM B ( 6.4 CuT )
  • Page 439 SiBE121135 Piping Diagrams 1.1.2 Heat Pump 3MXS40K2V1B OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) HEADER ELECTRONIC EXPANSION VALVE LIQUID PIPE HEADER THERMISTOR ( DLA ) 9.5CuT 6.4CuT ROOM A ( 6.4 CuT ) FILTER ELECTRONIC EXPANSION VALVE LIQUID PIPE THERMISTOR ( DLB ) FIELD...
  • Page 440 Piping Diagrams SiBE121135 3MXS68G2V1B OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR(DOA) HEADER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR(DLA) 6.4CuT HEADER 9.5CuT ROOM A (6.4 CuT) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR(DLB) FIELD 6.4CuT ROOM B PIPING (6.4 CuT) FILTER MOTOR OPERATED VALVE LIQUID LIQUID PIPE...
  • Page 441 SiBE121135 Piping Diagrams 4MXS80E2V3B OUTDOOR UNIT MOTOR OPERATED LIQUID PIPE HEAT EXCHANGER VALVE (A) OUTDOOR THERMISTOR (ROOM-A) 7.9CuT TEMPERATURE RECEIVER HEADER 7.9CuT 7.9CuT ROOM A THERMISTOR HEADER LIQUID PIPE MOTOR OPERATED 7.9CuT FILTER (6.4 CuT) VALVE (B) THERMISTOR 7.9CuT 9.5CuT (ROOM-B) 7.9CuT 7.9CuT...

  • Page 442: Indoor Unit

    Piping Diagrams SiBE121135 Indoor Unit 1.2.1 Wall Mounted Type FTXG25/35JV1BW(A) FTXG50JV1BW(A) INDOOR UNIT INDOOR UNIT 6.4CuT 6.4CuT HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR CROSS FLOW FAN CROSS FLOW FAN ON HEAT EXCH. ON HEAT EXCH. FIELD PIPING FIELD PIPING 6.4CuT 6.4CuT FAN MOTOR FAN MOTOR...
  • Page 443 SiBE121135 Piping Diagrams FTXS50J2V1B FTXS60GV1B INDOOR UNIT INDOOR UNIT ( 7.9CuT ) 6.4CuT HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING THERMISTOR CROSS FLOW FAN ON HEAT EXCH. ( 6.4CuT ) FIELD PIPING 6.4CuT FAN MOTOR FIELD PIPING ( 12.7CuT ) ( 12.7CuT )
  • Page 444 Piping Diagrams SiBE121135 1.2.2 Floor Standing Type FVXG25/35K2V1B FVXG50K2V1B INDOOR UNIT INDOOR UNIT RADIANT PANEL RADIANT PANEL THERMISTOR 6.4CuT THERMISTOR 6.4CuT THERMISTOR THERMISTOR HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. CROSS FLOW FAN CROSS FLOW FAN FIELD PIPING FIELD PIPING 6.4CuT...
  • Page 445 SiBE121135 Piping Diagrams 1.2.3 Floor / Ceiling Suspended Dual Type FLXS25/35BAVMB FLXS50/60BAVMB INDOOR UNIT INDOOR UNIT ( 6.4CuT ) ( 9.5CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR FIELD PIPING ON HEAT ON HEAT FIELD PIPING EXCH. ( 6.4CuT ) ( 6.4CuT ) EXCH.
  • Page 446 Piping Diagrams SiBE121135 1.2.5 Ceiling Mounted Cassette Type FCQG35/50/60FVEB REFRIGERANT FLOW COOLING HEATING HEAT EXCHANGER MODEL FCQG35FVEB 9.52 FCQG50FVEB 6.35 12.7 FCQG60FVEB LIQUID PIPE CONNECTION PORT φ A GAS PIPE CONNECTION PORT φ B C: 4D076993 FFQ25/35/50/60B9V1B Indoor heat exchanger Field piping φ...
  • Page 447 SiBE121135 Piping Diagrams 1.2.6 Ceiling Suspended Type FHQ35/50/60BWV1B Indoor heat exchanger φ Field piping C1220T-O φ Field piping C1220T-O Outdoor unit Indoor unit MODEL FHQ35BWV1B FHQ50, 60BWV1B 12.7 C: 4D037995L Appendix...
  • Page 448 Piping Diagrams SiBE121135 1.2.7 Ceiling Mounted Built-in Type FDBQ25B8V1 Heat exchanger Refrigerant flow Cooling Heating Refrigerant pipe connection port diameters Model Liquid Liquid pipe connection port φ9.52 φ6.35 FDBQ25B8V1 Gas pipe connection port C: 3TW20815-1B FBQ35/50/60C8VEB Refrigerant flow Heat exchanger Cooling Heating Refrigerant pipe connection port diameters...

  • Page 449: Wiring Diagrams

    SiBE121135 Wiring Diagrams 2. Wiring Diagrams Outdoor Unit 2.1.1 Cooling Only 3MKS50E3V1B MRM20 3.15A POWER SUPPLY MRM10 6(P) + + + 7(N) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A PCB1 ROOM C S101 SHEET METAL t˚ t˚ t˚...
  • Page 450 Wiring Diagrams SiBE121135 4MKS75F2V1B MRM20 3.15A POWER SUPPLY V100 MRM10 6(P) 7(N) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A MRC/W PCB1 ROOM C S101 t° t° t° t° t° t° t° t° t° t° t° ROOM D S102 R10T R11T PCB2...
  • Page 451 SiBE121135 Wiring Diagrams 2.1.2 Heat Pump 3MXS40K2V1B, 3MXS52E3V1B MRM20 3.15A POWER SUPPLY MRM10 6(P) + + + 7(N) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A PCB1 ROOM C S101 SHEET METAL t˚ t˚ t˚ t˚ t˚ t˚ t˚ t˚...
  • Page 452 Wiring Diagrams SiBE121135 4MXS68F2V1B MRM20 3.15A POWER SUPPLY V100 MRM10 6(P) 7(N) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A MRC/W PCB1 ROOM C S101 t° t° t° t° t° t° t° t° t° t° t° ROOM D S102 PCB2 R10T R11T...
  • Page 453 SiBE121135 Wiring Diagrams 5MXS90E2V3B 1N ~50Hz 230V WHT : WHITE YLW : YELLOW ORG : ORANGE RED : RED GRN : GREEN BLU : BLUE BRN : BROWN BLK : BLACK GRY : GREY TO INDOOR UNIT ROOM B ROOM A ROOM C ROOM D ROOM E...

  • Page 454: Indoor Unit

    Wiring Diagrams SiBE121135 Indoor Unit 2.2.1 Wall Mounted Type FTXG25/35/50JV1BW(A) : FRAME GROUND : FUSE H1P, H2P : PILOT LAMP 3.15A C102 : FAN MOTOR OUTDOOR MR10 M1S, M2S : SWING MOTOR : STEPPING MOTOR C101 INTELLIGENT EYE TRANSMISSION A1P~A3P : PRINTED CIRCUIT BOARD SENSOR / YLW...
  • Page 455 SiBE121135 Wiring Diagrams FTXS25/35/42/50J2V1B PCB3 PCB1 LED1 3.15A OUTDOOR C102 LED2 MR10 FIELD WIRING. LED3 C101 TRANSMISSION CAUTION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY t˚ IS TURNED OFF AND THEN BACK ON AGAIN. : BUZZER RTH1 C101, C102 : CAPACITOR...
  • Page 456 Wiring Diagrams SiBE121135 2.2.2 Floor Standing Type FVXG25/35/50K2V1B PCB1 PCB3 → RECTIFIER S2W(4) 3.15A outdoor MR10 GRN/YLW PCB2 C102 FIELD WIRING. SIGNAL RECEIVER TRANSMISSION CAUTION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS C101 TURNED OFF AND THEN BACK 1 RED ON AGAIN.
  • Page 457 SiBE121135 Wiring Diagrams 2.2.3 Floor / Ceiling Suspended Dual Type FLXS25/35/50/60BAVMB PCB3 PCB1 PCB2 3.15A → outdoor FIELD WIRING. / YLW PCB4 TRANSMISSION CIRCUIT CAUTION NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS indoor TURNED OFF AND THEN BACK ON AGAIN.
  • Page 458 Wiring Diagrams SiBE121135 2.2.5 Ceiling Mounted Cassette Type FCQG35/50/60FVEB INDOOR UNIT R2T R3T INPUT FROM 35~60 OUTSIDE ( NOTE 9 ) t˚ t˚ CLASS CENTRAL REMOTE H2P BS1 CONTROLLER (NOTE 2) +C105 TO OUTDOOR X18A X17A X15A UNIT ( NOTE 8 ) X24A NOTE)3 RECEIVER/DISPLAY UNIT...
  • Page 459 SiBE121135 Wiring Diagrams FFQ25/35/50/60B9V1B : COLOR OF WIRE. : (MARKED) COLOR OF WIRE CONNECTOR. : COLOR OF PCB CONNECTOR. IN CASE OF SIMUL TANEOUS TO OUTDOOR OPERATION SYSTEM UNIT WIRED INDOOR UNIT INDOOR UNIT REMOTE (MASTER) (SLAVE) CONTROLLER SWITCH BOX (SEE NOTE 3) REMOTE CONTROLLER...
  • Page 460 Wiring Diagrams SiBE121135 2.2.6 Ceiling Suspended Type FHQ35/50/60BWV1B PUSH BUTTON SWITCH ( ON/OFF ) PRINTED CIRCUIT BOARD :CONNECTOR DISCRIMINATION COLOUR FOR COMPONENTS. CAPACITOR ( M1F ) PILOT LAMP IN CASE OF SIMULTANEOUS ( ON-RED ) FUSE ( F5A 250V ) :CONNECTOR COLOUR FOR COMPONENTS.
  • Page 461 SiBE121135 Wiring Diagrams FBQ35/50C8VEB COLORS: : BLACK : BLUE : BROWN : GREY : ORANGE : PINK : RED : WHITE : YELLOW : GREEN TRANSMISSION WIRING 1N~220-240V 50Hz CENTRAL REMOTE 1N~220V 60Hz CONTROLLER NOTE 2 WIRED REMOTE CONTROLLER (OPTIONAL ACCESSORY) COMMON POWER SUPPLY NOTE 4...
  • Page 462 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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