Fujitsu ARXG45KMLA Service Manual
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Fujitsu ARXG45KMLA Service Manual

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AIR CONDITIONER
Duct type
INDOOR
OUTDOOR
SERVICE MANUAL
ARXG36KMLA
ARXG45KMLA
AOYG36KRTA
AOYG45KRTA
SR_AR014EF_03
2020.11.16

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  • Page 1 AIR CONDITIONER Duct type SERVICE MANUAL INDOOR ARXG36KMLA ARXG45KMLA OUTDOOR AOYG36KRTA AOYG45KRTA SR_AR014EF_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_AR014EF_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........................01-7...
  • Page 7 1. Specifications 1-1. Indoor unit Type Inverter heat pump Model name ARXG36KMLA ARXG45KMLA Power supply 3N 400 V ~ 50 Hz Power supply intake Outdoor unit Available voltage range 342—457 V k→ 12.1 Rated Btu/h 32,400 41,300 Cooling k→ 2.8—11.2 4.0—13.0...
  • Page 8 Specifications for ErP Lot10 Model name ARXG36KMLA Cooling Energy efficiency class Heating (Average) Cooling 9.5 (35°C) Pdesign k→ Heating (Average) 8.7 (-10°C) SEER Cooling 6.10 k→h/k→h SCOP Heating (Average) 4.00 Annual energy consumption k→h/a QHE (Average) 3,044 - (01-2) - 1-1.
  • 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 →...
  • Page 10 Type Inverter heat pump Model name AOYG45KRTA 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 →...
  • Page 11 2. Dimensions 2-1. Indoor unit ¢ Models: ARXG36KMLA and ARXG45KMLA Unit: mm Φ205 Φ3.2 Front view 1,177 Gas pipe Drain port Liquid pipe Φ200 Knockout Drain port for fresh air Φ5 Φ3.2 80 80 P125 × 3 = 375 P125 × 3 = 375 Φ5...
  • Page 12 ¢ Installation space requirement Provide sufficient installation space for product safety.  Models: ARXG36KMLA and ARXG45KMLA Unit: mm 2,500 or more (When no ceiling) 300 or more 150 or more Floor - (01-6) - 2-1. Indoor unit 2. Dimensions...
  • Page 13 2-2. Outdoor unit ¢ Model: 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 14 ¢ Model: AOYG45KRTA 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 15.2...
  • Page 15 2. TECHNICAL DATA AND PARTS LIST 2020.11.16 SR_CH02_AR014EF_03...
  • Page 16 CONTENTS 2. TECHNICAL DATA AND PARTS LIST 1. Precautions....................02-1 2. Indoor unit parts list..................02-2 2-1. Models: AR↓G36KMLA and AR↓G45KMLA ..............02-2 3. Outdoor unit parts list.................02-8 3-1. Model: AOYG36KRTA....................02-8 3-2. Model: AOYG45KRTA....................02-12 4. Accessories ....................02-16 4-1. Indoor unit ........................02-16 4-2. Outdoor unit........................02-16 5.
  • Page 17 • 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 18 2. Indoor unit parts list 2-1. Models: ARXG36KMLA and ARXG45KMLA ¢ Thermistors Hook metal Ref. Description Part number Room thermistor 9900826048 Pipe thermistor 9900942045 - (02-2) - 2-1. Models: AR↓G36KMLA and AR↓G45KMLA 2. Indoor unit parts list...
  • Page 19 ¢ Main PC board Ref. Description Part number Main PCB (24KMLA) 9710624223 Main PCB (30KMLA) 9710624230 Main PCB (36KMLA) 9710624247 Main PCB (45KMLA) 9710624254 Holder 0600063023 Communication PCB 9710019005 Power supply PCB 9710661013 Terminal 3P 9306489045 Terminal 5P 9900896003 Reactor assy 9707457049 - (02-3) - 2-1.
  • Page 20 ¢ Evaporator Main panel sub assy Bracket pipe sub assy Ref. Description Part number Drain pan sub assy 9374513017 Evaporator Total Assy (24KMLA) 9374517978 Evaporator Total Assy (30, 36KMLA) 9383816048 Evaporator Total Assy (45KMLA) 9383816031 - (02-4) - 2-1. Models: AR↓G36KMLA and AR↓G45KMLA 2.
  • Page 21 ¢ Casing and fan Intake cover sub assy Intake frame assy Motor bracket Ref. Description Part number Casing A 9374233021 Casing B 9374234028 Sirocco fan assy 9356531060 Fan motor assy 9380718031 Rubber 9385102002 - (02-5) - 2-1. Models: AR↓G36KMLA and AR↓G45KMLA 2.
  • Page 22 ¢ Casing and fan Ref. Description Part number Casing A 9374233021 Casing B 9374234028 Sirocco Fan Assy 9356531046 Fan Motor 9603213015 - (02-6) - 2-1. Models: AR↓G36KMLA and AR↓G45KMLA 2. Indoor unit parts list...
  • Page 23 - (02-7) - 2-1. Models: AR↓G36KMLA and AR↓G45KMLA 2. Indoor unit parts list...
  • Page 24 3. Outdoor unit parts list 3-1. Model: AOYG36KRTA ¢ Exterior parts and chassis - (02-8) - 3-1. Model: AOYG36KRTA 3. Outdoor unit parts list...
  • Page 25 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 26 ¢ Compressor - (02-10) - 3-1. Model: AOYG36KRTA 3. Outdoor unit parts list...
  • Page 27 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 28 3-2. Model: AOYG45KRTA ¢ Exterior parts and chassis - (02-12) - 3-2. Model: AOYG45KRTA 3. Outdoor unit parts list...
  • Page 29 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 30 ¢ Compressor - (02-14) - 3-2. Model: AOYG45KRTA 3. Outdoor unit parts list...
  • Page 31 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 32 4. Accessories 4-1. Indoor unit ¢ Models: ARXG36KMLA and ARXG45KMLA Part name Exterior Q’ty Part name Exterior Q’ty Operating manual Cable tie (medium) Operating manual Cable tie (small) (CD-ROM) Coupler heat insulation Installation manual (large) Coupler heat insulation Hanger (small)
  • Page 33 5. Optional parts 5-1. Indoor unit ¢ Controllers Exterior Part name Model name Summary Easy finger touch operation with LCD →ired remote panel. Backlit LCD enables easy UTY-RNRYZ* controller operation in a dark room. →ire type: Non-polar 2-wire High visibility and easy operation. Room temperature can be accurately →ired remote controlled using the built-in thermo...
  • Page 34 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. →ire type: Polar 3-wire IR receiver kit with wireless Unit control is performed by wireless UTY-LBTYM remote remote controller.
  • Page 35 Exterior Part name Model name Summary Remotely manage an air conditioning system using mobile devices such as →ireless LAN UTY-TFS↓Z1 smartphones and tablets. adapter For connection indoor unit with UART interface. For connection between indoor unit Modbus UTY-VMS↓ with UART interface and a Modbus converter open network.
  • Page 36 6. Refrigerant system diagrams 6-1. Models: AOYG36KRTA and AOYG45KRTA 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 37 7. Wiring diagrams 7-1. Indoor unit ¢ Models: ARXG36KMLA and ARXG45KMLA - (02-21) - 7-1. Indoor unit 7. →iring diagrams...
  • Page 38 7-2. Outdoor unit ¢ Model: AOYG36KRTA ¢ Model: AOYG45KRTA - (02-22) - 7-2. Outdoor unit 7. →iring diagrams...
  • Page 39 8. PC board diagrams 8-1. Models: ARXG36KMLA and ARXG45KMLA CONTROL UNIT 24 model : EZ-0182EHSE 36 model: EZ-0182GHSE CN8 Thermistor Characteristics. Temperature 30 model : EZ-0182FHSE 45 model: EZ-0182HHSE ( 20 ( 30 Thermistor 33.62 k 12.54 k 8.04 k DC5V-1 Thermistor ( Room temp.
  • Page 40 8-2. Models: AOYG36KRTA and AOYG45KRTA 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 WHITE...
  • Page 41 3. TROUBLESHOOTING 2020.11.16 SR_CH03_AR014EF_02...
  • Page 42 CONTENTS 3. TROUBLESHOOTING 1. Error code ....................03-1 1-1. Error code table (→ired remote controller)..............03-1 1-2. Error code table (Outdoor unit: for 36/45 model only).............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.

  • Page 43: Table Of Contents

    CONTENTS (continued) 3-5. Abnormal noise......................03-47 3-6. →ater leaking........................03-48 4. Service parts information .................03-49 4-1. Compressor........................03-49 4-2. Inverter compressor......................03-50 4-3. Outdoor unit Electronic Expansion Valve (EEV) ............03-52 4-4. Indoor unit fan motor ....................03-54 4-5. Outdoor unit fan motor....................03-55 4-6. Pressure switch ......................03-56 4-7.
  • Page 45 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 46 1-2. Error code table (Outdoor unit: for 36/45 model only) 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 47 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 48: 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) →ired remote Indicator Error code E: 11 controller Main PCB →hen 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 49 Check point 4. Check serial signal (Reverse transfer signal) Check serial signal (Reverse transfer signal) BLACK WHITE WHITE BLACK BLUE • Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1 —3.

  • Page 50: E: 11. Serial Communication Error (Serial Forward Transfer Error) (Indoor Unit)

    2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) →ired remote Indicator Error code E: 11 controller →hen 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 51 Check point 4. Check serial signal (Forward transfer signal) Check serial signal (Forward transfer signal) BLACK WHITE WHITE BLACK BLUE • 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 52: E: 12. →Ired Remote Controller Communication Error (Indoor Unit)

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

  • Page 53: E: 15. Automatic Air Flow Adjustment Error (Indoor Unit)

    2-4. E: 15. Automatic air flow adjustment error (Indoor unit) →ired remote Indicator Error code E: 15 controller • On automatic airflow adjustment operation, when the fan speed other than 0rpm is detected at the 0rpm operation. • On automatic airflow adjustment operation, when Detective actuator Indoor unit Main PCB...

  • Page 54: E: 18. External Communication Error (Indoor Unit)

    2-5. E: 18. External communication error (Indoor unit) →ired 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 55: E: 23. Combination Error (Outdoor Unit)

    2-6. E: 23. Combination error (Outdoor unit) →ired remote Indicator Error code E: 23 controller Detective actuator Indoor unit • →hen 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 56: E: 32. Indoor Unit Main Pcb Error (Indoor Unit)

    2-7. E: 32. Indoor unit main PCB error (Indoor unit) →ired remote Indicator Error code E: 32 controller →hen power is on and there is some below case. Detective actuator Indoor unit main PCB 1. →hen model information of EEPROM is incorrect. 2.

  • Page 57: E: 33. Indoor Unit Motor Electricity Consumption Detection Error (Indoor Unit)

    2-8. E: 33. Indoor unit motor electricity consumption detection error (Indoor unit) →ired remote Indicator Error code E: 33 controller Indoor unit motor electricity →hen 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 58: E: 35. Manual Auto Button Error (Indoor Unit)

    2-9. E: 35. MANUAL AUTO button error (Indoor unit) →ired remote Indicator Error code E: 35 controller Indoor unit controller PCB →hen 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 59: E: 39. Indoor Unit Power Supply Error For Fan Motor (Indoor Unit)

    2-10. E: 39. Indoor unit power supply error for fan motor (Indoor unit) →ired remote Indicator Error code E: 39 controller • →hen a momentary power cut off Detective actuator Indoor unit main PCB • →hen do not start fan motor External cause Forecast of cause Connector connection failure...
  • Page 60 2-11. E: 3A. Indoor unit communication circuit (wired remote controller) error →ired remote Indicator Error code E: 3A controller →ired 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 61: E: 41. Room Temperature Sensor Error (Indoor Unit)

    2-12. E: 41. Room temperature sensor error (Indoor unit) →ired 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 62: E: 42. Indoor Unit Heat Exchanger Sensor Error (Indoor Unit)

    2-13. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) →ired remote Indicator Error code E: 42 controller Indoor unit main PCB →hen 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 63: E: 51. Indoor Unit Fan Motor Error (Indoor Unit)

    2-14. E: 51. Indoor unit fan motor error (Indoor unit) →ired remote Indicator Error code E: 51 controller main PCB →hen 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 64: E: 53. Drain Pump Error (Indoor Unit)

    2-15. E: 53. Drain pump error (Indoor unit) →ired remote Indicator Error code E: 53 controller Indoor unit main PCB Detective actuator →hen 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 65: E: 62. Outdoor Unit Main Pcb Error (Outdoor Unit)

    2-16. E: 62. Outdoor unit main PCB error (Outdoor unit) →ired 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 66: E: 63. Inverter Error (Outdoor Unit)

    2-17. E: 63. Inverter error (Outdoor unit) →ired 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 67: E: 64. Pfc Circuit Error (Outdoor Unit)

    2-18. E: 64. PFC circuit error (Outdoor unit) →ired remote Indicator Error code E: 64 controller • →hen inverter input DC voltage is higher than 420 V for over 3 seconds, the compressor stops. Detective actuator Outdoor unit Main PCB •...

  • Page 68: E: 65. Trip Terminal L Error (Outdoor Unit)

    2-19. E: 65. Trip terminal L error (Outdoor unit) →ired remote Indicator Error code E: 65 controller →hen 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 69: E: 71. Discharge Thermistor Error (Outdoor Unit)

    2-20. E: 71. Discharge thermistor error (Outdoor unit) →ired remote Indicator Error code E: 71 controller Outdoor unit main PCB →hen 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 70: E: 72. Compressor Thermistor Error (Outdoor Unit)

    2-21. E: 72. Compressor thermistor error (Outdoor unit) →ired remote Indicator Error code E: 72 controller Outdoor unit main PCB →hen 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 71: E: 73. Heat Exchanger (Middle/Outlet) Temperature Thermistor Error (Outdoor Unit)

    2-22. E: 73. Heat exchanger (Middle/Outlet) temperature thermistor error (Outdoor unit) →ired 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 72: E: 74. Outdoor Temperature Thermistor Error (Outdoor Unit)

    2-23. E: 74. Outdoor temperature thermistor error (Outdoor unit) →ired remote Indicator Error code E: 74 controller Outdoor unit main PCB →hen 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 73: E: 77. Heat Sink Thermistor Error (Outdoor Unit)

    2-24. E: 77. Heat sink thermistor error (Outdoor unit) →ired 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 74: E: 84. Current Sensor Error (Outdoor Unit)

    2-25. E: 84. Current sensor error (Outdoor unit) →ired remote Indicator Error code E: 84 controller →hen input current sensor has detected 0 A, while inverter compressor is operating at higher than 50 rps, Detective actuator Outdoor unit main PCB after 1 minute upon starting the compressor.

  • Page 75: E: 86. High Pressure Switch Error (Outdoor Unit)

    2-26. E: 86. High pressure switch error (Outdoor unit) →ired remote Indicator Error code E: 86 controller Outdoor unit main PCB 30 seconds or more after power-on, when pressure sensor detection value detects the condition below Detective actuator continuously for 30 seconds or more. High pressure switch Ps ≤...

  • Page 76: E: 94. Trip Detection (Outdoor Unit)

    2-27. E: 94. Trip detection (Outdoor unit) →ired remote Indicator Error code E: 94 controller Inverter PCB Protection stop by over-current generation after inverter compressor start processing completed generated Main PCB consecutively 10 times. Detective actuator Outdoor unit NOTE: The number of generations is reset when the Compressor compressor starts up.

  • Page 77: E: 95. Compressor Motor Control Error (Outdoor Unit)

    2-28. E: 95. Compressor motor control error (Outdoor unit) →ired remote Indicator Error code E: 95 controller Main PCB "Protection stop by "overcurrent generation at inverter Detective actuator Outdoor unit compressor starting" restart" generated consecutively 10 Compressor times x 3 sets (total 30 times) Defective connection of electric components Forecast of cause Main PCB failure...

  • Page 78: E: 97. Outdoor Unit Fan Motor Error (Outdoor Unit)

    2-29. E: 97. Outdoor unit fan motor error (Outdoor unit) →ired remote Indicator Error code E: 97 controller Main PCB 1. →hen outdoor fan rotation speed is less than 100 rpm in 20 seconds after fan motor starts, fan motor stops.

  • Page 79: E: 99. 4-Way Valve Error (Outdoor Unit)

    2-30. E: 99. 4-way valve error (Outdoor unit) →ired remote Indicator Error code E: 99 controller Indoor unit main PCB →hen 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 80 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 03-49. • Solenoid coil Remove P60 from PCB and check the resistance value of coil. Resistance value is 1.97 kΩ. If it is open or abnormal resistance value, replace solenoid coil.
  • Page 81 2-31. E: A1. Discharge temperature error (Outdoor unit) →ired 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 82 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. - (03-38) - 2-31. E: A1. Discharge temperature error (Outdoor unit) 2.
  • Page 83 2-32. E: A3. Compressor temperature error (Outdoor unit) →ired 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 84 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. - (03-40) - 2-32. E: A3. Compressor temperature error (Outdoor unit) 2.
  • Page 85 2-33. E: AC. Heat sink temperature error (Outdoor unit) →ired 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 86 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 87 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 88 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 • Indoor unit: – Check incorrect wiring between indoor unit and remote controller. – Check if there is an open cable connection.
  • Page 89 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 90 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 91: 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 92: Ater 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? MPa MPa •...

  • Page 93: 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 94: 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 95 ¢ Model: AOYG45KRTA 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) BLACK...

  • Page 96: Outdoor Unit Electronic Expansion Valve (Eev)

    4-3. Outdoor unit Electronic Expansion Valve (EEV) ¢ Models: AOYG36KRTA and AOYG45KRTA Check point 1. Check connections Check connection of connector. (Loose connector or open cable) NOTE: For details of wiring diagram, refer to "→iring diagrams" in Chapter 2. TECHNICAL DATA AND PARTS LIST on page 02-21.
  • Page 97 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 98: Indoor Unit Fan Motor

    4-4. Indoor unit fan motor ¢ Models: ARXG36KMLA and ARXG45KMLA WARNING →hen you approach this part, please cut off the power supply and wait for a while until DC voltage has been discharged. Check point 1. Check rotation of fan Rotate the fan by hand when operation is off.

  • Page 99: Outdoor Unit Fan Motor

    4-5. Outdoor unit fan motor ¢ Models: AOYG36KRTA and AOYG45KRTA 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 100: Pressure Switch

    4-6. Pressure switch ¢ Models: AOYG36KRTA and AOYG45KRTA • 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 model: P770 - (03-56) - 4-6.

  • Page 101: 4-Way Valve Coil (Solenoid Coil)/4-Way Valve

    4-7. 4-way valve coil (solenoid coil)/4-way valve ¢ Models: AOYG36KRTA and AOYG45KRTA 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 102: 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 103: 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 104 ¢ 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 105 ¢ 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 106 - (03-62) - 5-2. Outdoor unit 5. Thermistor resistance values...
  • Page 107 4. CONTROL AND FUNCTIONS 2020.05.19 SR_CH04_AR014EF_01...
  • Page 108 CONTENTS 4. CONTROL AND FUNCTIONS 1. Compressor frequency control..............04-1 1-1. Cooling operation ......................04-1 1-2. Heating operation ......................04-2 1-3. Dry operation ........................04-2 1-4. Compressor frequency at normal start-up ..............04-3 1-5. Compressor frequency limitation by outdoor temperature ..........04-5 2. Auto changeover operation................04-7 3.

  • Page 109: Compressor Frequency Control

    1. Compressor frequency control 1-1. Cooling operation A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. •...

  • Page 110: Heating Operation

    1-2. Heating operation A sensor (room temperature thermistor) built in indoor unit body will usually perceive difference or variation between setting temperature and present room temperature, and controls operation fre- quency of compressor. • If the room temperature is 6.0 °C lower than a set temperature, the compressor operation frequen- cy will attain to maximum performance.

  • Page 111: 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 112 ¢ Model: AOYG45KRTA 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 Time 7...

  • Page 113: 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 114 • 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 115: Auto Changeover Operation

    2. Auto changeover operation →hen 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 116 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 117: 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 ARXG36KMLA ARXG45KMLA HIGH 1,270 1,300 1,020 Heating LO→ QUIET S-LO→ HIGH...
  • Page 118 ¢ 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 119: Outdoor Fan Control

    ¢ 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 Indoor fan speed S-LOW 30 (sec) 3-2. Outdoor fan control ¢...
  • Page 120  AOYG45KRTA Fan speed is defined by outdoor temperature and compressor frequency. Unit: rpm Fan step Cooling or dry Heating — — — S-HIGH — • →hen the compressor frequency increases, the outdoor fan speed also changes to the higher speed.

  • Page 121: Timer Operation Control

    4. Timer operation control 4-1. Wireless remote control On/Off timer Program timer Sleep timer Weekly timer ○ ○ ○ — ¢ On/Off timer • Off timer: →hen the clock reaches the set timer, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 122 ¢ 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 123: Ired Remote Control

    4-2. Wired remote control Temperature set On/Off timer Program timer Sleep timer Weekly timer back timer ○ ○ ○ ○ ○ ¢ On/Off timer • Off timer: →hen the clock reaches the set timer, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 124 ¢ 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 125 ¢ 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 126: Defrost Operation Control

    5. 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 127: Defrost Operation In Heating Operation Stopped

    5-1. 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 128: Various Control

    6. Various control 6-1. Auto restart →hen 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 129: Compressor Preheating

    6-5. Compressor preheating By preheating the compressor, warm airflow is quickly discharged when the operation is started. • Triggering condition 1 – Outdoor temperature ≤ 20°C →hen outdoor temperature reaches 26°C, compressor preheating stops. – 30 minutes after compressor stopped •...

  • Page 130: Drain Pump Control

    6-8. 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 131  Overflow control • Triggering condition The float switch is turned on. • Operation details – The drain pump is turned on. – →hen the operation mode is cooling or dry, operate the followings. • The compressor is stopped. • Then indoor fan control is turned off. •...
  • Page 132 ¢ Drain control for dehumidification operation  During cooling or dry mode • →hen the compressor starts, the drain pump starts simultaneously. • The drain pump operates continuously for 3 minutes after the compressor is turned off. Compressor Drain pump 3 minutes •...

  • Page 133: Prevention To Restart For 3 Minutes (3 Minutes St)

     During heating mode or fan mode and when operation is stopped • Triggering condition Drain pump is turned on at the same time that the float switch is turned on. • Operation details →hen the float switch turns on continuously for 3 minutes, "failure indication" operates. There- after, even if the float switch turns off, the "failure indication"...

  • Page 134: Various Protections

    7. Various protections 7-1. Discharge gas temperature over-rise prevention control The discharge gas temperature sensor (discharge thermistor: outdoor unit side) detects the dis- charge gas temperature. • →hen 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 135: Current Release Control

    7-3. 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 136: Indoor Unit Fan Motor Over Temperature Protection

    7-4. Indoor unit fan motor over temperature protection →hen satisfy the following conditions, the protection works. • After the 90 seconds from the fan operation, detect less than 200 rpm for 10 seconds. • IPM trip protection works. • Current overload protection works. →hen detecting the above condtion, recheck the condition after 6 minutes.

  • Page 137: High Temperature And High Pressure Release Control

    7-8. High temperature and high pressure release control The compressor is controlled as follows. ¢ Models: AOYG36KRTA and AOYG45KRTA • 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 Zone D...
  • Page 138 - (04-30) - 7-8. High temperature and high pressure release control 7. Various protections...
  • Page 139 5. FILED WORKING 2020.11.16 SR_CH05_AR014EF_02...
  • Page 140 CONTENTS 5. FILED WORKING 1. Function settings ..................05-1 1-1. Function settings on indoor unit..................05-1 1-2. Function settings on outdoor unit..................05-7...
  • Page 141 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. Related components on the PCB and the applicable settings: Component Setting content...
  • Page 142 ¢ DIP switch setting • SW100: Remote controller address setting →hen operating a number of indoor units by using a wired remote controller, DIP switch set- ting for assigning unit number to each indoor unit is required. The slide switches are normally set to make the unit number 00. Remote Switch number controller...
  • Page 143 ¢ 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 144 3) 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 145 4) 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 146 7) 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 ♦ 8) External input control "Operation/Stop" mode or "Forced stop" mode can be selected. Function number Setting value Setting description...
  • Page 147 11) Primary and secondary settings Set the indoor unit that is connected to the outdoor unit using a transmission cable as the primary. Function number Setting value Setting description Factory setting Primary ♦ Secondary 12) Switching functions for external output terminal Functions of the external output terminal can be switched.
  • Page 148  Switch buttons and the functions LED lamps S134 S133 S132 S131 S130 Switch buttons LED lamp Function or operation method Lights on while power on. (1) PO→ER/MODE Green Local setting in outdoor unit or error code is displayed with blink. (2) ERROR Blinks during error operation.
  • Page 149 ¢ Local setting procedure NOTE: Before performing the function setting, be sure to stop the operation of the air conditioner.  Low noise mode Press the MODE switch button (S134) for 3 seconds or more to switch to “Local setting mode”. After confirming the LED lamp of PO→ER/MODE blinks 9 times, press the ENTER switch but- ton (S132).
  • Page 150  Peak cut mode Press the MODE switch button (S134) for 3 seconds or more to switch to “Local setting mode”. After confirming the LED lamp of PO→ER/MODE blinks 9 times, press the ENTER switch but- ton (S132). PUMP POWER LOW NOISE PEAK CUT DOWN...

This manual is also suitable for:

Arxg36kmlaAoyg36krtaAoyg45krta

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