Fujitsu AUXG36KRLB Service Manual
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Fujitsu AUXG36KRLB Service Manual

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AIR CONDITIONER
Cassette type
INDOOR
OUTDOOR
SERVICE MANUAL
AUXG36KRLB
AUXG45KRLB
AUXG54KRLB
AOYG36KRTA
AOYG45KRTA
AOYG54KRTA
SR_AU014EF_03
2020.11.16
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Summary of Contents for Fujitsu AUXG36KRLB

  • Page 1 AIR CONDITIONER Cassette type SERVICE MANUAL INDOOR AUXG36KRLB AUXG45KRLB AUXG54KRLB OUTDOOR AOYG36KRTA AOYG45KRTA AOYG54KRTA SR_AU014EF_03 2020.11.16...
  • Page 2 • Product specifications and design are subject to change without notice for future improvement. • For further details, please check with our authorized dealer. Trademarks ™ FGLair is trademark of Fujitsu General Limited in the United States, other countries or both. ™ Google Play is trademark of Google Inc. ®...
  • Page 3 CONTENTS 1. GENERAL INFORMATION 2. TECHNICAL DATA AND PARTS LIST 3. TROUBLESHOOTING 4. CONTROL AND FUNCTIONS 5. FILED WORKING...
  • Page 5 1. GENERAL INFORMATION 2020.11.16 SR_CH01_AU014EF_02...
  • Page 6 CONTENTS 1. GENERAL INFORMATION 1. Specifications....................01-1 1-1. Indoor unit ........................01-1 1-2. Outdoor unit........................01-3 2. Dimensions....................01-5 2-1. Indoor unit ........................01-5 2-2. Outdoor unit........................01-8...
  • Page 7 1. Specifications 1-1. Indoor unit Cassette Type Inverter heat pump Model name AUXG36KRLB AUXG45KRLB AUXG54KRLB Power supply 3N 400 V ~ 50 Hz Power supply intake Outdoor unit Available voltage range 342—457 V 12.1 13.4 Rated Btu/h 32,400 41,300 45,700 Cooling 2.8—11.2...
  • Page 8 Specifications for ErP Lot10 Model name AUXG36KRLB Cooling Energy efficiency class Heating (Average) Cooling 9.5 (35°C) Pdesign Heating (Average) 8.7 (-10°C) SEER Cooling 6.55 kWh/kWh SCOP Heating (Average) Annual energy consump- kWh/a tion QHE (Average) 2,828 Cooling Sound power level...
  • Page 9 1-2. Outdoor unit Type Inverter heat pump Model name AOYG36KRTA Power supply 3N 400 V ~ 50 Hz Power supply intake Outdoor unit Available voltage range 342—457 V Starting current Cooling 3,750 Airflow rate Heating 3,750 Type × Q'ty Propeller × 1 Motor output Cooling Sound pressure level *1...
  • Page 10 Type Inverter heat pump Model name AOYG45KRTA AOYG54KRTA Power supply 3N 400 V ~ 50 Hz Power supply intake Outdoor unit Available voltage range 342—457 V Starting current Cooling 4,450 Airflow rate Heating 4,450 Type × Q'ty Propeller × 1 Motor output Cooling Sound pressure level *1...
  • Page 11 2. Dimensions 2-1. Indoor unit ¢ Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB Unit: mm Hanging bolt position Drain hose View A Ceiling Wire hole Fresh air inlet (cut out) Ø95 View B View C 4 × Ø3.2 hole - (01-5) - 2-1.
  • Page 12 ¢ Installation space requirement Unit: mm Strong and durable ceiling 1,500 or more 3,000 or more 1,800 to H2 1,000 or more Obstruction Floor Model name H1: Attic height AUXG36-54KRLB 298 or more Be sure to make function setting with the remote controller according to the installed ceiling height. H2: The maximum height from floor to ceiling Model name Ceiling height...
  • Page 13 • Human sensor (Option) Top view Drain Refrigerant pipe pipe Human sensor Example of sensitivity range: Unit: mm 3,200 8,800 Ceiling height 3,200 mm Equal sensitivity range of temperature Detecting position 800 mm from floor surface NOTE: When the installation height gets higher, the temperature sensitivity decreases. CAUTION •...
  • Page 14 2-2. Outdoor unit ¢ Models: AOYG36KRTA Unit: mm 35.7 Top view 3 Way valve (Liquid) 3 Way valve (Gas) 25 67 Ф28: Cable port Pipe port Ф28: Cable port Ф28: Cable port Ф28: Cable port Ф28: Cable port Ф28: Cable port Pipe port Pipe port Front view...
  • Page 15 ¢ Models: AOYG45KRTA and AOYG54KRTA Unit: mm 35.7 Top view 3 Way valve (Liquid) 3 Way valve (Gas) 129.1 Pipe port Ф28 Ф28 85.3 Cable port Pipe port Ф28: Cable port Cable port Pipe port Pipe port Pipe port Front view Side view Rear view 62.6...
  • Page 16 - (01-10) - 2-2. Outdoor unit 2. Dimensions...
  • Page 17 2. TECHNICAL DATA AND PARTS LIST 2019.10.04 SR_CH02_AU014EF_01...
  • Page 18 1. Precautions....................02-1 2. Cassette grille (optional part) parts list.............02-2 2-1. Model: UTG-UKYC-W ....................02-2 3. Indoor unit parts list..................02-5 3-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB.........02-5 4. Outdoor unit parts list................02-10 4-1. Model: AOYG36KRTA....................02-10 4-2. Models: AOYG45KRTA and AOYG54KRTA ..............02-14 5. Accessories ....................02-18 5-1.
  • Page 19 • Service parts information and design are subject to change without notice for product improve- ment. • For the latest information of the service parts, refer to our Service Portal. https://fujitsu-general.force.com/portal/ • Precise figure of the service parts listed in this manual may differ from the actual service parts. - (02-1) -...
  • Page 20 2. Cassette grille (optional part) parts list 2-1. Model: UTG-UKYC-W ¢ Intake grille Description Parts No. Intake Grille Assy 9381691005 Long Life Filter 9378252028 Filter Guide 9378253018 Hook Wire 9378597020 - (02-2) - 2-1. Model: UTG-UKYC-W 2. Cassette grille (optional part) parts list...
  • Page 21 ¢ Panels Description Parts No. Decoration Panel 9381352005 Corner Panel Assy 9381711000 9381713004 Drain Cover Assy - (02-3) - 2-1. Model: UTG-UKYC-W 2. Cassette grille (optional part) parts list...
  • Page 22 ¢ Louvers and motors Description Parts No. Detail A Louver Assy 9381693009 Motor Case Assy 9381712007 Step Motor 9900885007 Motor Cover 9381354009 Wire (Step Motor) 9710175008 - (02-4) - 2-1. Model: UTG-UKYC-W 2. Cassette grille (optional part) parts list...
  • Page 23 3. Indoor unit parts list 3-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB ¢ Miscellaneous parts Hook B Hook A Hook A Wire cover - (02-5) - 3-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB 3. Indoor unit parts list...
  • Page 24 Main PCB (AUXG54KRLB) 9710995910 Power PCB 9710022005 PCB (Non-polar 2-wire) 9710019005 Remote terminal 5P 9900896003 Power Terminal 3P 9900720032 Main PCB holder 9381350001 Power PCB Holder 9381349005 - (02-6) - 3-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB 3. Indoor unit parts list...
  • Page 25 Bellmouth (30,36,45,54) 9381345007 Turbo fan assy 9381303007 Turbo Fan Washer 9378394018 9356998009 Brushless motor 9603443009 Special Nut 9378388017 Motor Wire Holder 9381351008 Drain pan sub assy 9381789009 - (02-7) - 3-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB 3. Indoor unit parts list...
  • Page 26 Vane L 9381745012 Vane R 9381744008 Drain Pump Sub Assy 9381793006 Drain Port Sub Assy 9381788002 Drain Hose 9379665001 Hose Band 9379757010 Float Switch Sub Assy 9381794003 - (02-8) - 3-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB 3. Indoor unit parts list...
  • Page 27 9381787012 Insulation Box Sub Assy (30,36,45,54) 9381787005 Evaporator Total Assy (24) 9378580664 Evaporator Total Assy (30) 9378580671 Evaporator Total Assy (36,45,54) 9378580688 Wind Guide Board 9382125004 - (02-9) - 3-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB 3. Indoor unit parts list...
  • Page 28 4. Outdoor unit parts list 4-1. Model: AOYG36KRTA ¢ Exterior parts and chassis - (02-10) - 4-1. Model: AOYG36KRTA 4. Outdoor unit parts list...
  • Page 29 Item no. Part no. Part name Service part 9383880001 Top panel assy ♦ 9383779008 Protective net ♦ 9375361013 Net rubber ♦ 9900984038 Thermistor (Heat exchanger) ♦ 9900727154 Thermistor assy ♦ 9383607004 Thermo holder ♦ 9383874000 Right panel sub assy ♦ 9383879005 Rear pipe cover ♦...
  • Page 30 ¢ Compressor - (02-12) - 4-1. Model: AOYG36KRTA 4. Outdoor unit parts list...
  • Page 31 Item no. Part no. Part name Service part 9383858000 Sound insulation unit ♦ 9900565091 Thermistor (Outdoor temp.) ♦ 9900186029 Pressure switch ♦ 9374425631 4-way valve assy ♦ 9970194016 Solenoid ♦ 9970158018 Sensor ♦ 9384848017 Accumulator assy (service) ♦ 9970209000 Expansion valve coil ♦...
  • Page 32 4-2. Models: AOYG45KRTA and AOYG54KRTA ¢ Exterior parts and chassis - (02-14) - 4-2. Models: AOYG45KRTA and AOYG54KRTA 4. Outdoor unit parts list...
  • Page 33 Item no. Part no. Part name Service part 9383880001 Top panel assy ♦ 9381013005 Protective net ♦ 9375361013 Net rubber ♦ 9900984038 Thermistor (Heat exchanger) ♦ 9900727154 Thermistor assy ♦ 9383607004 Thermo holder ♦ 9383874017 Right panel sub assy ♦ 9383879005 Rear pipe cover ♦...
  • Page 34 ¢ Compressor - (02-16) - 4-2. Models: AOYG45KRTA and AOYG54KRTA 4. Outdoor unit parts list...
  • Page 35 Item no. Part no. Part name Service part 9383858017 Sound insulation unit ♦ 9900565091 Thermistor (Outdoor temp.) ♦ 9900186029 Pressure switch ♦ 9374425624 4-way valve assy ♦ 9970194016 Solenoid ♦ 9970158018 Sensor ♦ 9384848000 Accumulator assy (Service) ♦ 9970209000 Expansion valve coil ♦...
  • Page 36 5. Accessories 5-1. Indoor unit ¢ Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB Part name Exterior Q’ty Part name Exterior Q’ty Operating manual Insulation Operating manual Drain hose (CD-ROM) Installation manual Hose band Drain hose heat Template (Carton top) insulation Washer Cable tie (large)
  • Page 37 6. Optional parts 6-1. Indoor unit ¢ Controllers Exterior Part name Model name Summary Easy finger touch operation with LCD Wired remote panel. Backlit LCD enables easy UTY-RNRYZ* controller operation in a dark room. Wire type: Non-polar 2-wire High visibility and easy operation. Room temperature can be accurately Wired remote controlled using the built-in thermo...
  • Page 38 Exterior Part name Model name Summary Compact remote controller concentrates on the basic functions such as Start/Stop, fan control, Simple remote temperature setting, and operation UTY-RSNYM controller mode. Wire type: Polar 3-wire IR receiver kit with wireless Unit control is performed by wireless UTY-LBTYC remote remote controller.
  • Page 39 ¢ Others Exterior Part name Model name Summary Human sensor UTY-SHZXC For circular flow cassette type. Use to connect with various peripheral External devices and air conditioner PCB. UTY-XWZXZG connect kit For control output port. Air outlet shutter Installed at the air outlet when 3- UTR-YDZK plate directions mode is performed.
  • Page 40 Exterior Part name Model name Summary Remotely manage an air conditioning system using mobile devices such as Wireless LAN UTY-TFSXZ1 smartphones and tablets. adapter For connection indoor unit with UART interface. For connection between indoor unit Modbus UTY-VMSX with UART interface and a Modbus converter open network.
  • Page 41 7. Refrigerant system diagrams 7-1. Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA Heat exchanger 3-Way 3-Way ( INDOOR ) valve valve Pressure switch Pressure sensor 4-Way valve Strainer Expansion valve Heat exchanger Strainer ( OUTDOOR ) : Cooling : Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat Exchanger Med temperature) : Thermistor (Outdoor temperature)
  • Page 42 8. Wiring diagram 8-1. Indoor unit ¢ Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB - (02-24) - 8-1. Indoor unit 8. Wiring diagram...
  • Page 43 8-2. Outdoor unit ¢ Model: AOYG36KRTA ¢ Models: AOYG45KRTA and AOYG54KRTA - (02-25) - 8-2. Outdoor unit 8. Wiring diagram...
  • Page 44 9. PC board diagrams 9-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB CONTROL UNIT 24 model: EZ-01823HSE 45 model: EZ-01826HSE 30 model: EZ-01824HSE 54 model: EZ-01827HSE 36 model: EZ-01825HSE EMI FILTER Thermistor Characteristics. ZCAT1518-0730 TERMINAL 2 TURNS OPTION ( 2 WIRE TYPE )
  • Page 45 9-2. Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA INVERTER ASSEMBLY 36 model: EZ-0190HUE 45 model: EZ-0191HUE 54 model: EZ-0191HUE DC340V UL1015 AWG20 GREEN UL1430 AWG22 DC FAN MOTOR 1 DC15V-2 TERMINAL EMI FILTER UL1430 AWG22 EMI FILTER F102 BLACK BLACK GRFC-8 P650 GRFC-8 UL1430 AWG22 WHITE...
  • Page 46 - (02-28) - 9-2. Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA 9. PC board diagrams...
  • Page 47 3. TROUBLESHOOTING 2020.11.16 SR_CH03_AU014EF_02...
  • Page 48 CONTENTS 3. TROUBLESHOOTING 1. Error code ....................03-1 1-1. Error code table (Wired remote controller)..............03-1 1-2. Error code table (Outdoor unit) ..................03-2 2. Troubleshooting with error code ...............03-4 2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit).....03-4 2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) ....03-6 2-3.

  • Page 49: Table Of Contents

    CONTENTS (continued) 3-3. No operation (Power is on) ...................03-47 3-4. No cooling/No heating ....................03-48 3-5. Abnormal noise......................03-50 3-6. Water leaking........................03-51 4. Service parts information .................03-52 4-1. Compressor........................03-52 4-2. Inverter compressor......................03-53 4-3. Outdoor unit Electronic Expansion Valve (EEV) ............03-55 4-4. Indoor unit fan motor ....................03-57 4-5.
  • Page 51 1. Error code 1-1. Error code table (Wired remote controller) The operation, timer, and economy indicators operate according to the error contents. For confirmation of the error contents, refer the flashing pattern as follows. Wired remote Error contents controller display E: 11.
  • Page 52 1-2. Error code table (Outdoor unit) The operation status is determined by the lighting up and blinking of the LED lamp. After check that ERROR LED lamp blinks, press the ENTER button once. NOTE: For the positions of LED lamp and buttons, refer to "Functionsettings (for outdoor unit)" in Chapter 5.
  • Page 53 PUMP LOW NOISE PEAK CUT POWER/ DOWN Error contents ERROR MODE E: 84. Current sensor error (Outdoor ■ ● ■ ■ ○ ○ ○ ● unit) E: 86. High pressure switch error ■ ● ■ ■ ○ ● ● ○ (Outdoor unit) ■...

  • Page 54: E: 11. Serial Communication Error (Serial Reverse Transfer Error) (Outdoor Unit)

    2. Troubleshooting with error code 2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) Wired remote Indicator Error code E: 11 controller Main PCB When the indoor unit cannot receive the serial signal from outdoor unit more than 2 minutes after power on, Detective actuator Outdoor unit or the indoor unit cannot receive the serial signal more...
  • Page 55 Check point 4. Check serial signal (Reverse transfer signal) Check serial signal (Reverse transfer signal) BLACK WHITE BLACK WHITE • Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1 —3. •...

  • Page 56: E: 11. Serial Communication Error (Serial Forward Transfer Error) (Indoor Unit)

    2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) Wired remote Indicator Error code E: 11 controller When the outdoor unit cannot receive the serial signal Detective actuator Indoor unit Main PCB from indoor unit more than 10 seconds. Connection failure Forecast of cause External cause...
  • Page 57 Check point 4. Check serial signal (Forward transfer signal) Check serial signal (Forward transfer signal) BLACK WHITE BLACK WHITE • Check if indicated value swings between AC 30 V and AC 130 V at outdoor unit terminal 2—3. • If it is abnormal, replace main PCB. ↓...

  • Page 58: E: 12. Wired Remote Controller Communication Error (Indoor Unit)

    2-3. E: 12. Wired remote controller communication error (Indoor unit) Wired remote Indicator Error code E: 12 controller Indoor unit Main PCB When the indoor unit cannot receive the signal from wired remote controller more than following time during normal operation. Detective actuator Wired remote control •...

  • Page 59: E: 18. External Communication Error (Indoor Unit)

    2-4. E: 18. External communication error (Indoor unit) Wired remote Indicator Error code E: 18 controller External After receiving a signal from the external input and Detective actuator Indoor unit communication output PCB, the same signal has not been received for error 15 seconds.

  • Page 60: E: 23. Combination Error (Outdoor Unit)

    2-5. E: 23. Combination error (Outdoor unit) Wired remote Indicator Error code E: 23 controller Detective actuator Indoor unit • When the outdoor unit type is multi type Forecast of cause Incorrect indoor unit is selected. Check point 1. Check the type of indoor unit •...

  • Page 61: E: 26. Address Setting Error In Wired Remote Controller (Indoor Unit)

    2-6. E: 26. Address setting error in wired remote controller (Indoor unit) Wired remote Indicator Error code E: 26 controller Wired remote controller (2-wire) • When the address number set by auto setting and manual setting are mixed in one remote controller group Detective actuator Indoor unit controller PCB...

  • Page 62: E: 29. Connected Unit Number Error (Indoor Unit)

    2-7. E: 29. Connected unit number error (Indoor unit) Wired remote Indicator Error code E: 29 controller Wired remote controller (2-wire) When the number of the connected indoor unit exceeds Detective actuator the limitation. Indoor unit main PCB Wrong wiring of indoor unit or remote controller Number of indoor unit or remote controller in remote Forecast of cause controller group...

  • Page 63: E: 32. Indoor Unit Main Pcb Error (Indoor Unit)

    2-8. E: 32. Indoor unit main PCB error (Indoor unit) Wired remote Indicator Error code E: 32 controller When power is on and there is some below case. Detective actuator Indoor unit main PCB 1. When model information of EEPROM is incorrect. 2.

  • Page 64: E: 33. Indoor Unit Motor Electricity Consumption Detection Error (Indoor Unit)

    2-9. E: 33. Indoor unit motor electricity consumption detection error (Indoor unit) Wired remote Indicator Error code E: 33 controller Indoor unit motor electricity When the voltage value or the current value of the motor Detective actuator consumption detection go beyond the limits Fan motor failure Forecast of cause Main PCB failure...

  • Page 65: E: 35. Manual Auto Button Error (Indoor Unit)

    2-10. E: 35. MANUAL AUTO button error (Indoor unit) Wired remote Indicator Error code E: 35 controller Indoor unit controller PCB When the MANUAL AUTO button becomes on for Detective actuator Indicator PCB consecutive 60 or more seconds. Manual auto switch MANUAL AUTO button failure Forecast of cause Controller PCB and indicator PCB failure...

  • Page 66: E: 39. Indoor Unit Power Supply Error For Fan Motor (Indoor Unit)

    2-11. E: 39. Indoor unit power supply error for fan motor (Indoor unit) Wired remote Indicator Error code E: 39 controller • When a momentary power cut off Detective actuator Indoor unit main PCB • When do not start fan motor External cause Forecast of cause Connector connection failure...
  • Page 67 2-12. E: 3A. Indoor unit communication circuit (wired remote controller) error Wired remote Indicator Error code E: 3A controller Wired remote controller (2-wire) Detect the communication error of microcomputer and Detective actuator communication PCB. Indoor unit controller PCB circuit Communication PCB defective Forecast of cause Indoor unit main PCB defective Check point 1.

  • Page 68: E: 41. Room Temperature Sensor Error (Indoor Unit)

    2-13. E: 41. Room temperature sensor error (Indoor unit) Wired remote Indicator Error code E: 41 controller Indoor unit main PCB Room temperature thermistor is open or short is Detective actuator detected always. Room temperature thermistor Connector failure Forecast of cause Thermistor failure Main PCB failure Check point 1.

  • Page 69: E: 42. Indoor Unit Heat Exchanger Sensor Error (Indoor Unit)

    2-14. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) Wired remote Indicator Error code E: 42 controller Indoor unit main PCB When heat exchanger temperature thermistor open or Detective actuator Heat exchanger temperature short circuit is detected. thermistor Connector connection failure Forecast of cause Thermistor failure...

  • Page 70: E: 51. Indoor Unit Fan Motor Error (Indoor Unit)

    2-15. E: 51. Indoor unit fan motor error (Indoor unit) Wired remote Indicator Error code E: 51 controller main PCB When the condition that actual frequency of indoor fan is Detective actuator Indoor unit below 1/3 of target frequency is continued more than 56 Fan motor seconds.

  • Page 71: E: 53. Drain Pump Error (Indoor Unit)

    2-16. E: 53. Drain pump error (Indoor unit) Wired remote Indicator Error code E: 53 controller Indoor unit main PCB Detective actuator When Float switch is ON for more than 3 minutes. Float switch Float switch failure Shorted connector/wire failure Forecast of cause Main PCB failure Drain pump failure...

  • Page 72: E: 62. Outdoor Unit Main Pcb Error (Outdoor Unit)

    2-17. E: 62. Outdoor unit main PCB error (Outdoor unit) Wired remote Indicator Error code E: 62 controller Access to EEPROM failed due to some cause after Detective actuator Outdoor unit Main PCB outdoor unit started. External cause (Noise, temporary open, voltage drop) Forecast of cause Main PCB failure Check point 1.

  • Page 73: E: 63. Inverter Error (Outdoor Unit)

    2-18. E: 63. Inverter error (Outdoor unit) Wired remote Indicator Error code E: 63 controller Detective actuator Outdoor unit Inverter PCB Error information received from inverter PCB Forecast of cause External cause Power supply to inverter PCB wiring disconnection or open Inverter PCB failure Check point 1.

  • Page 74: E: 64. Pfc Circuit Error (Outdoor Unit)

    2-19. E: 64. PFC circuit error (Outdoor unit) Wired remote Indicator Error code E: 64 controller • When inverter input DC voltage is higher than 420 V for over 3 seconds, the compressor stops. Detective actuator Outdoor unit Main PCB •...

  • Page 75: E: 65. Trip Terminal L Error (Outdoor Unit)

    2-20. E: 65. Trip terminal L error (Outdoor unit) Wired remote Indicator Error code E: 65 controller When the signal from FO terminal of IPM is “L” (0 V) Detective actuator Outdoor unit Main PCB during the compressor stopping. Forecast of cause Main PCB failure Check point 1.

  • Page 76: E: 71. Discharge Thermistor Error (Outdoor Unit)

    2-21. E: 71. Discharge thermistor error (Outdoor unit) Wired remote Indicator Error code E: 71 controller Outdoor unit main PCB When discharge pipe temperature thermistor open or Detective actuator short circuit is detected at power on or while running the Discharge pipe temperature compressor thermistor...

  • Page 77: E: 72. Compressor Thermistor Error (Outdoor Unit)

    2-22. E: 72. Compressor thermistor error (Outdoor unit) Wired remote Indicator Error code E: 72 controller Outdoor unit main PCB When compressor temperature thermistor open or short Detective actuator circuit is detected at power on or while running the Compressor temperature thermistor compressor Connector failure Forecast of cause...

  • Page 78: E: 73. Heat Exchanger (Middle/Outlet) Temperature Thermistor Error (Outdoor Unit)

    2-23. E: 73. Heat exchanger (Middle/Outlet) temperature thermistor error (Outdoor unit) Wired remote Indicator Error code E: 73 controller Heat exchanger liquid temperature • Heat exchanger liquid temperature thermistor short thermistor or open detected Detective actuator Heat exchanger middle • Heat exchanger middle temperature thermistor temperature thermistor short or open detected...

  • Page 79: E: 74. Outdoor Temperature Thermistor Error (Outdoor Unit)

    2-24. E: 74. Outdoor temperature thermistor error (Outdoor unit) Wired remote Indicator Error code E: 74 controller Outdoor unit main PCB When outdoor temperature thermistor open or short Detective actuator circuit is detected at power on or while running the Outdoor temperature thermistor compressor Connector failure...

  • Page 80: E: 77. Heat Sink Thermistor Error (Outdoor Unit)

    2-25. E: 77. Heat sink thermistor error (Outdoor unit) Wired remote Indicator Error code E: 77 controller Detective actuator Heat sink temperature thermistor Heat sink temperature thermistor short or open detected Connector failure Forecast of cause Thermistor failure Inverter PCB failure Check point 1.

  • Page 81: E: 84. Current Sensor Error (Outdoor Unit)

    2-26. E: 84. Current sensor error (Outdoor unit) Wired remote Indicator Error code E: 84 controller When input current sensor has detected 0 A, while inverter compressor is operating at higher than 56 rps, Detective actuator Outdoor unit main PCB after 1 minute upon starting the compressor.

  • Page 82: E: 86. High Pressure Switch Error (Outdoor Unit)

    2-27. E: 86. High pressure switch error (Outdoor unit) Wired remote Indicator Error code E: 86 controller Outdoor unit main PCB When pressure switch open is detected in 10 seconds Detective actuator after the power is turned on. High pressure switch High pressure switch connector disconnection or open Forecast of cause High pressure switch characteristics failure...

  • Page 83: E: 94. Trip Detection (Outdoor Unit)

    2-28. E: 94. Trip detection (Outdoor unit) Wired remote Indicator Error code E: 94 controller Check point 1. Check the outdoor unit fan operation, heat-exchanger, ambient temperature • No obstructions in air passages? • Heat exchange fins clogged • Outdoor unit fan motor check •...

  • Page 84: E: 95. Compressor Motor Control Error (Outdoor Unit)

    2-29. E: 95. Compressor motor control error (Outdoor unit) Wired remote Indicator Error code E: 95 controller Check point 1. Check Noise from Compressor Turn on Power and check operation noise. → If an abnormal noise show, replace compres- sor. ↓...

  • Page 85: E: 97. Outdoor Unit Fan Motor Error (Outdoor Unit)

    2-30. E: 97. Outdoor unit fan motor error (Outdoor unit) Wired remote Indicator Error code E: 97 controller Main PCB 1. When outdoor fan rotation speed is less than 100 rpm in 20 seconds after fan motor starts, fan motor stops.

  • Page 86: E: 99. 4-Way Valve Error (Outdoor Unit)

    2-31. E: 99. 4-way valve error (Outdoor unit) Wired remote Indicator Error code E: 99 controller Indoor unit main PCB When the indoor heat exchanger temperature is compared with the room temperature, and either Heat exchanger temperature following condition is detected continuously two times, thermistor the compressor stops.
  • Page 87 Check point 4. Check the solenoid coil and 4-way valve NOTE: Refer solenoid coil and 4-way valve in "Service parts information" on page 03-52. • Solenoid coil Remove P60 from PCB and check the resistance value of coil. Resistance value is 1.97kΩ. →...
  • Page 88 2-32. E: A1. Discharge temperature error (Outdoor unit) Wired remote Indicator Error code E: A1 controller Outdoor unit main PCB Protection stop by discharge temperature ≥ 110 °C Detective actuator during compressor operation generated 2 times within Discharge temperature thermistor 24 hours.
  • Page 89 Check point 5. Check the refrigerant amount Check the refrigerant leakage. ↓ Check point 6. Replace main PCB If check point 1 to 5 do not improve the symptom, replace the main PCB. ↓ - (03-39) - 2-32. E: A1. Discharge temperature error (Outdoor unit) 2.
  • Page 90 2-33. E: A3. Compressor temperature error (Outdoor unit) Wired remote Indicator Error code E: A3 controller Outdoor unit main PCB Protection stop by compressor temperature ≥ 108 °C Detective actuator during compressor operation generated 2 times within Compressor temperature thermistor 24 hours.
  • Page 91 Check point 5. Check the refrigerant amount Check the refrigerant leakage. ↓ Check point 6. Replace main PCB If check point 1 to 5 do not improve the symptom, replace the main PCB. ↓ - (03-41) - 2-33. E: A3. Compressor temperature error (Outdoor unit) 2.
  • Page 92 2-34. E: A5. Low pressure error (Outdoor unit) Wired remote Indicator Error code E: A5 controller Outdoor unit main PCB Protection stop by suction pressure ≥ 0.02 MPaG Detective actuator continued 5 minutes repeats 5 times within 24 hours. Suction pressure sensor 3-way valve not opened Outdoor unit ambient temperature too low Outdoor unit operation failure, foreign matter on heat...
  • Page 93 Check point 6. Check the refrigerant amount Check the refrigerant leakage. ↓ Check point 7. Replace main PCB If check point 1 to 6 do not improve the symptom, replace the main PCB. ↓ - (03-43) - 2-34. E: A5. Low pressure error (Outdoor unit) 2.
  • Page 94 2-35. E: AC. Heat sink temperature error (Outdoor unit) Wired remote Indicator Error code E: AC controller Outdoor unit inverter PCB Protection stop by heat sink temperature ≥ 80 °C during Detective actuator heat sink operation generated 2 times within 24 hours. Heat sink temperature thermistor Foreign matter on heat sink, heat sink dirty Foreign matter on heat exchanger, excessive ambient...
  • Page 95 3. Troubleshooting without error code 3-1. Indoor unit—No power Power supply failure Forecast of cause External cause Electrical components defective Check point 1. Check installation condition • Isn’t the breaker down? • Check loose or removed connection cable. -> If abnormal condition is found, correct it by referring to the installation manual or the “DESIGN & TECHNICAL MANUAL”.
  • Page 96 3-2. Outdoor unit—No power Power supply failure Forecast of cause External cause Electrical components defective Check point 1. Check installation condition • Is the circuit breaker on or off? • Check loose or removed connection cable. → If abnormal condition is found, correct it by referring to the installation manual or the “DESIGN & TECHNICAL MANUAL”.

  • Page 97: No Operation (Power Is On)

    3-3. No operation (Power is on) Setting/ Connection failure Forecast of cause External cause Electrical components defective Check point 1. Check indoor and outdoor installation condition -> If there is some abnormal condition, correct it by referring to the installation manual and “DESIGN &...

  • Page 98: No Cooling/No Heating

    3-4. No cooling/No heating Indoor unit error Outdoor unit error Forecast of cause Effect by surrounding environment Connection pipe/Connection wire failure Refrigeration cycle failure Check point 1. Check Indoor unit • Does Indoor unit fan run in the HIGH mode? •...
  • Page 99 NOTES: • Strainer normally does not have temperature difference between inlet and outlet as shown be- low. Pipe (In) Pipe (Out) • If there is a difference like shown below, there is a possibility of inside clogged. In this case, re- place the strainer.

  • Page 100: Abnormal Noise

    3-5. Abnormal noise Abnormal installation (indoor unit/outdoor unit) Forecast of cause Fan failure (indoor unit/outdoor unit) Compressor failure (outdoor) Diagnosis method when abnormal noise is occurred Abnormal noise is coming from Outdoor Abnormal noise is coming from Indoor unit. unit. (Check and correct followings) (Check and correct followings) ↓...

  • Page 101: Water Leaking

    3-6. Water leaking Erroneous installation Forecast of cause Drain hose failure Diagnosis method when water is spitting Diagnosis method when water leak occurs • Is main unit installed in stable condi- tion? Is the filter clogged? • Is main unit broken or deformed at the time of transportation or maintenance? ↓...

  • Page 102: Service Parts Information

    4. Service parts information 4-1. Compressor Diagnosis method of compressor (If outdoor unit LED displays error, refer to troubleshooting) Does not start up Stops soon after starting up Abnormal noise ↓ ↓ ↓ Check if vibration noise by Is there open or loose con- Is there open or loose con- loose bolt or contact noise of nection cable?

  • Page 103: Inverter Compressor

    4-2. Inverter compressor ¢ Model: AOYG36KRTA Check point 1. Check connection • Check terminal connection of compressor (loose or incorrect wiring) T(W) S(V) (BLACK) (WHITE) Main PCB R(U) (RED) • Check terminal connection of main PCB (loose or incorrect wiring) Main PCB W400(U) W401(V) W402(W)
  • Page 104 ¢ Models: AOYG45KRTA and AOYG54KRTA Check point 1. Check connection • Check terminal connection of compressor (loose or incorrect wiring) C (W) S(V) (BLACK) (WHITE) Main PCB R(U) (RED) • Check terminal connection of main PCB (loose or incorrect wiring) Main PCB W400(U) W401(V) W402(W)

  • Page 105: Outdoor Unit Electronic Expansion Valve (Eev)

    4-3. Outdoor unit Electronic Expansion Valve (EEV) ¢ Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA Check point 1. Check connections Check connection of connector. (Loose connector or open cable) NOTE: For details of wiring diagram, refer to "Wiring diagrams" in Chapter 2. TECHNICAL DATA AND PARTS LIST.
  • Page 106 Check point 6. Check strainer • Strainer normally does not have temperature difference between inlet and outlet as shown be- low. Pipe (In) Pipe (Out) • If there is a difference like shown below, there is a possibility of inside clogged. In this case, replace the strainer.

  • Page 107: Indoor Unit Fan Motor

    4-4. Indoor unit fan motor ¢ Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB Check point 1. Check rotation of fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) → If fan or bearing is abnormal, replace it.

  • Page 108: Outdoor Unit Fan Motor

    4-5. Outdoor unit fan motor ¢ Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA Check point 1. Check rotation of fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) → If fan or bearing is abnormal, replace it. Check point 2.

  • Page 109: Pressure Switch

    4-6. Pressure switch ¢ Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA • Type of contact Pressure • Characteristics of pressure switch Pressure switch 1 Contact: Short → Open 4.2 — 4.05 MPa Contact: Open → Short 3.2 ± 0.15 MPa 36/45/54 model: P770 - (03-59) - 4-6.

  • Page 110: 4-Way Valve Coil (Solenoid Coil)/4-Way Valve

    4-7. 4-way valve coil (solenoid coil)/4-way valve ¢ Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA Check point 1. Check connection • Check the connection of connector P60. BLACK SOLENOID COIL BLACK ↓ Check Point 2 : Check solenoid coil Remove P60 from PCB and check the resistance value of coil. Resistance Value ≈...

  • Page 111: Thermistor Resistance Values

    5. Thermistor resistance values 5-1. Indoor unit ¢ Room temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -10.0 58.25 0.73 -5.0 44.03 0.93 33.62 1.15 25.93 1.39 10.0 20.18 1.66 15.0 15.84 1.94 20.0 12.54 2.22 25.0 10.00 2.50 30.0 8.04 2.77 35.0...

  • Page 112: Outdoor Unit

    5-2. Outdoor unit ¢ Heatsink thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 94.26 0.08 -25.0 67.95 0.11 -20.0 49.62 0.15 -15.0 36.68 0.20 -10.0 27.42 0.26 -5.0 20.73 0.34 15.83 0.43 12.21 0.55 10.0 9.50 0.68 15.0 7.46 0.84 20.0 5.90 1.01...
  • Page 113 ¢ Discharge temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 1,013.11 0.06 -25.0 729.09 0.09 -20.0 531.56 0.12 -15.0 392.31 0.16 -10.0 292.91 0.21 -5.0 221.09 0.28 168.60 0.36 129.84 0.46 10.0 100.91 0.57 15.0 79.12 0.71 20.0 62.55 0.86 25.0 49.84...
  • Page 114 ¢ Heat exchanger temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 95.58 0.24 -25.0 68.90 0.32 -20.0 50.31 0.43 -15.0 37.19 0.57 -10.0 27.81 0.73 -5.0 21.02 0.92 16.05 1.14 12.38 1.39 10.0 9.63 1.65 15.0 7.56 1.93 20.0 5.98 2.21 25.0...
  • Page 115 4. CONTROL AND FUNCTIONS 2020.05.12 SR_CH04_AU014EF_01...
  • Page 116 CONTENTS 4. CONTROL AND FUNCTIONS 1. Compressor frequency control..............04-1 1-1. Cooling operation ......................04-1 1-2. Heating operation ......................04-3 1-3. Dry operation ........................04-3 1-4. Compressor frequency at normal start-up ..............04-4 1-5. Compressor frequency limitation by outdoor temperature ..........04-6 2. Auto changeover operation................04-8 3.
  • Page 117 CONTENTS (continued) 8-7. Low outdoor temperature protection................04-32 8-8. High temperature and high pressure release control ............04-33...

  • Page 119: Compressor Frequency Control

    • Compressor frequency range Model name Minimum frequency Maximum frequency AUXG36KRLB 15 rps 98 rps AUXG45KRLB 17 rps 95 rps...
  • Page 120 Unit: rps Outdoor Indoor unit fan mode Model name temperature HIGH QUIET zone A zone B zone C zone AUXG36KRLB D zone E zone F zone A zone B zone AUXG45KRLB C zone AUXG54KRLB D zone E zone F zone - (04-2) - 1-1.

  • Page 121: Heating Operation

    • When the room temperature is within the range of +1.0°C to -6.0°C of the setting temperature, the compressor frequency is controlled within the range shown below. • Compressor frequency range Unit: rps Model name Minimum frequency Maximum frequency AUXG36KRLB 15 rps 120 rps AUXG45KRLB 17 rps 120 rps AUXG54KRLB 1-3.

  • Page 122: Compressor Frequency At Normal Start-Up

    1-4. Compressor frequency at normal start-up ¢ Model: AOYG36KRTA Compressor frequency soon after starting is controlled as below. Frequency VIII Frequency VII Frequency VI Frequency V Frequency IV Frequency III Frequency II Frequency I Time 1 Time 2 Time 3 Time 4 Time 5 Time 6...
  • Page 123 ¢ Models: AOYG45KRTA and AOYG54KRTA Compressor frequency soon after starting is controlled as below. Frequency X Frequency IX Frequency VIII Frequency VII Frequency VI Frequency V Frequency IV Frequency III Frequency II Frequency I Time 1 Time 2 Time 3 Time 4 Time 5 Time 6...

  • Page 124: Compressor Frequency Limitation By Outdoor Temperature

    1-5. Compressor frequency limitation by outdoor temperature The minimum compressor frequency is limited by outdoor temperature as below. • Cooling/Dry mode K zone 52°C J zone 50°C I zone 46°C H zone 31°C G zone 21°C F zone 13°C E zone 7°C D zone °C...
  • Page 125 • Heating mode I zone 20°C H zone 16°C G zone 12°C F zone 7°C E zone 2°C D zone -7°C C zone -10°C B zone -15°C A zone Limitation of compressor Model name Outdoor temperature zone frequency A zone 58 rps B zone 52 rps...

  • Page 126: Auto Changeover Operation

    2. Auto changeover operation When the air conditioner is set to AUTO mode by remote controller, operation starts in the optimum mode from among heating, cooling, dry and monitoring modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set be- tween 18°C and 30°C in 1.0°C steps.
  • Page 127 Operation flow chart Start Ts: Setting temperarure Monitor mode Room temp. > Ts+2°C? Room temp. < Ts-2°C? Middle zone Auto change over is second or more? Operation mode before the monitor mode is cooling mode? Operation mode of Heating operation Cooling operation outdoor unit: Cooling? Thermostat remains...

  • Page 128: Fan Control

    3. Fan control Tr: Room temperature Ts: Setting temperature 3-1. Indoor fan control ¢ Fan speed Indoor fan speed is defined as below. Speed (rpm) Operation mode Fan mode AUXG36KRLB AUXG45KRLB AUXG54KRLB HIGH MED+ Heating QUIET Cool air prevention S-LOW...
  • Page 129 ¢ Dry operation During dry operation, fan speed setting can not be changed as shown in “Fan speed” above. ¢ Heating operation Switch the airflow AUTO, and the indoor fan motor will run according to a room temperature, as be- low.
  • Page 130 • 10 °C HEAT operation Indoor heat exchanger Indoor heat exchanger temperature rises temperature drops AUTO 39°C 34°C ¢ Moisture return prevention control (cooling and dry mode) Switch the airflow AUTO at cooling mode, and the indoor fan motor will run as shown below. Compressor Indoor fan setting airflow...

  • Page 131: Outdoor Fan Control

    3-2. Outdoor fan control ¢ Outdoor fan motor This outdoor unit has a DC fan motor. (Control method is different between AC and DC motors.) ¢ Fan speed  Model: AOYG36KRTA Fan speed is defined by outdoor temperature and compressor frequency. Unit: rpm Fan step Cooling or dry...
  • Page 132  Models: AOYG45KRTA and AOYG54KRTA Fan speed is defined by outdoor temperature and compressor frequency. Unit: rpm Fan step Cooling or dry Heating — — — S-HIGH — • When the compressor frequency increases, the outdoor fan speed also changes to the higher speed.

  • Page 133: Louver Control

    4-2. All louver control • All louver operation When the mode is selected, the standard louver position of the each mode is set. model name Operation mode Standard Position Cooling AUXG36KRLB Heating Monitor Cooling AUXG45KRLB AUXG54KRLB Heating Monitor NOTES: •...

  • Page 134: Swing Operation

    4-3. Swing operation • To select vertical airflow swing operation When the swing signal is received, the vertical airflow direction louver starts to swing. – Swinging range • Cooling mode/dry mode/fan mode: 1 ↔ 4 • Heating mode: 1 ↔ 4 –...

  • Page 135: Timer Operation Control

    5. Timer operation control 5-1. Wireless remote control On/Off timer Program timer Sleep timer Weekly timer ○ ○ ○ — ¢ On/Off timer • Off timer: When the clock reaches the set timer, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 136 ¢ Sleep timer If the sleep timer is set, the room temperature is monitored and the operation is stopped auto- matically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time on. •...

  • Page 137: Wired Remote Control

    5-2. Wired remote control Temperature set On/Off timer Program timer Sleep timer Weekly timer back timer ○ ○ ○ ○ ○ ¢ On/Off timer • Off timer: When the clock reaches the set timer, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 138 ¢ Sleep timer If the sleep timer is set, the room temperature is monitored and the operation is stopped auto- matically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time on. •...
  • Page 139 ¢ Temperature set back timer • The SET BACK timer only changes the set temperature for 7 days, it cannot be used to start or stop air conditioner operation. • The SET BACK timer can be set to operate up to two times per day but only one temperature setting can be used.

  • Page 140: Defrost Operation Control

    6. Defrost operation control Tn: Outdoor unit heat exchanger temperature Ta: Outdoor temperature Tn10: Temperature at 10 minutes after compressor start Tnb: Temperature before 5 minutes Triggering condition • The defrost operation starts when outdoor unit heat exchanger temperature sensor detects the temperature lower than the values shown below.

  • Page 141: Defrost Operation In Heating Operation Stopped

    6-1. Defrost operation in heating operation stopped If the outdoor unit is frosted when stopping the heating operation, it stops after performing the auto- matic defrosting operation. In this time, if the indoor unit operation lamp flashes slowly (6 sec on/2 sec off), the outdoor unit al- low the heat exchanger to defrost, and then stop.

  • Page 142: Various Control

    7. Various control 7-1. Auto restart When the power was interrupted by a power failure etc. during operation, the operation contents at that time are memorized and when the power is recovered, operation is automatically started with the memorized operation contents. Operation contents memorized when the power is interrupted Operation mode Setting temperature...

  • Page 143: Compressor Preheating

    7-5. Compressor preheating By preheating the compressor, warm airflow is quickly discharged when the operation is started. • Triggering condition 1 – Outdoor temperature ≤ 20°C When outdoor temperature reaches 26°C, compressor preheating stops. – 30 minutes after compressor stopped •...

  • Page 144: Drain Pump Control

    7-8. Drain pump control ¢ Drain control for cooling operation  During the compressor in operation • Triggering condition The thermostat is turned on during cooling or dry mode. • Operation details The drain pump is turned on. • Release condition –...
  • Page 145  Overflow control • Triggering condition The float switch is turned on. • Operation details – The drain pump is turned on. – When the operation mode is cooling or dry, operate the followings. • The compressor is stopped. • Then indoor fan control is turned off. •...

  • Page 146: Prevention To Restart For 3 Minutes (3 Minutes St)

    7-9. Prevention to restart for 3 minutes (3 minutes st) When the compressor fails to start for the number of times below, it does not enter operation status for 3 minutes. Retry number Retry set number When the compressor fails to start in the retry set number above, the compressor is stopped. 7-10.

  • Page 147: Outdoor Unit Low Noise Operation

    7-13. Outdoor unit low noise operation The compressor frequency and outdoor unit fan speed are limited to reduce the operation noise by external input. Compressor Outdoor fan speed frequency Low noise mode Low noise mode Cooling/Dry Level 1 Heating AOYG36KRTA Cooling/Dry Level 2 Heating...

  • Page 148: Various Protections

    8. Various protections 8-1. Discharge gas temperature over-rise prevention control The discharge gas temperature sensor (discharge thermistor: outdoor unit side) detects the dis- charge gas temperature. • When the discharge temperature becomes higher than the trigger condition, the compressor fre- quency is decreased as the table below, and it continues to decrease until the discharge tempera- ture becomes lower than the trigger condition.

  • Page 149: Current Release Control

    8-3. Current release control The compressor frequency is controlled so that the outdoor unit input current does not exceeds cur- rent limit value set according to the outdoor temperature. The compressor frequency returns according to the operation mode, when the current becomes low- er than the release value.

  • Page 150: Indoor Unit Fan Motor Over Temperature Protection

    8-4. Indoor unit fan motor over temperature protection When satisfy the following conditions, the protection works. • After the 90 seconds from the fan operation, detect less than 300 rpm for 10 seconds. • IPM trip protection works. • Current overload protection works. When detecting the above condtion, recheck the condition after 6 minutes.
  • Page 151 8-8. High temperature and high pressure release control The compressor is controlled as follows. ¢ Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA • Cooling mode Indoor unit heat exchanger Indoor unit heat exchanger temperature rises temperature drops 64°C Zone A 60°C 58°C Zone B Zone C Stable zone...
  • Page 152 - (04-34) - 8-8. High temperature and high pressure release control 8. Various protections...
  • Page 153 5. FILED WORKING 2020.05.12 SR_CH05_AU014EF_01...
  • Page 154 CONTENTS 5. FILED WORKING 1. Function settings ..................05-1 1-1. Function settings on indoor unit..................05-1 1-2. Function settings by using remote controller ..............05-3...
  • Page 155 1. Function settings To adjust the functions of this product according to the installation environment, various types of function settings are available. NOTE: Incorrect settings can cause a product malfunction. 1-1. Function settings on indoor unit By using some components on the PCB, you can change the function settings. ¢...
  • Page 156 ¢ DIP switch setting • SW100: Remote controller address setting NOTE: Because this setting is normally done automatically when 2-core wired remote con- troller is installed, setting is unnecessary. Multiple indoor units can be operated by using one wired remote controller. Set the unit number of each indoor unit.
  • Page 157 1-2. Function settings by using remote controller Some function settings can be changed on the remote controller. After confirming the setting proce- dure and the content of each function setting, select appropriate functions for your installation envi- ronment. ¢ Setting procedure by using remote controller Remote controller is not attached for this product.
  • Page 158 2) Ceiling height Select the appropriate ceiling height according to the place of installation. Function number Setting value Setting description Factory setting Standard ♦ High ceiling Low ceiling For the specific height for each setting value, refer to “Installation space” in Chapter "Dimensions" on page 1.
  • Page 159 5) Room temperature control for indoor unit sensor Depending on the installed environment, correction of the room temperature sensor may be re- quired. Select the appropriate control setting according to the installed environment. The temperature of the room temperature sensor is corrected as follows: Corrected temp.
  • Page 160 6) Room temperature control for wired remote controller sensor Depending on the installed environment, correction of the wire remote temperature sensor may be required. Select the appropriate control setting according to the installed environment. To change this setting, set Function 42 to Both “01”. Ensure that the Thermo Sensor icon is displayed on the remote controller screen.
  • Page 161 9) Remote controller custom code (Only for wireless remote controller) The indoor unit custom code can be changed. Select the appropriate custom code. Function number Setting value Setting description Factory setting ♦ 10) External input control "Operation/Stop" mode or "Forced stop" mode can be selected. Function number Setting value Setting description...
  • Page 162 13) Switching functions for external output terminal Functions of the external output terminal can be switched. For details, refer to “External input and output”. Function number Setting value Setting description Factory setting Operation status ♦ 01—08 (Setting prohibited) Error status Indoor unit fan operation status External heater - (05-8) -...

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