Fujitsu ARTG30LHTA Service Instruction
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Fujitsu ARTG30LHTA Service Instruction

Duct type inverter indoor / outdoor unit, refrigerant r410a
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Table of Contents

See also: Operating Manual
SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
DUCT
INVERTER
Models Indoor unit Outdoor unit
ARTG30LHTA
ARTG36LHTA
ARTG45LHTA
ARTG54LHTA
type
AOTG30LATL
AOTG36LATL
AOTG45LATL
AOTG54LATL
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Summary of Contents for Fujitsu ARTG30LHTA

  • Page 1 SPLIT TYPE ROOM AIR CONDITIONER DUCT type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AOTG30LATL ARTG30LHTA AOTG36LATL ARTG36LHTA ARTG45LHTA AOTG45LATL ARTG54LHTA AOTG54LATL R410A...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATIONS 1. DESCRIPTION OF EACH CONTROL OPERATION 1-1 COOLING OPERATION.................... 01-01 01-01 1-1-1 COOLING CAPACITY CONTROL..............1-2 HEATING OPERATION..................... 01-02 1-2-1 HEATING CAPACITY CONTROL..............01-02 1-3 DRY OPERATION...................... 01-03 1-3-1 INDOOR UNIT CONTROL................. 01-03 01-04 1-4 AUTO CHANGEOVER OPERATION................ 1-5 INDOOR FAN CONTROL..................
  • Page 3 R410A DUCT type INVERTER 2 . TROUBLE SHOOTING...
  • Page 4 2 ERROR DISPLAY 2-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY 1. SELF - DIAGNOSIS AR-WAF1E hen "Er" in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed service personnel. Unit number (usually 0) Error code SU MO TU WE TH FR SA ex.
  • Page 5 2. ERROR CODE HISTORY DISPLAY Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller. 1. Stop the air conditioner operation. 2. Press the SET TEMPERATURE buttons simultaneously for 3 seconds or more to start the self-diagnosis. Error code Error history number SU MO TU WE TH FR SA...
  • Page 6 2-1-2 OUTDOOR UNIT DISPLAY 1. OUTDOOR UNIT Indicator PCB LEDs Buttons 2. ERROR DETECTION Display when an error occurs. PUMP PEAK POWER ERROR DOWN NOISE MODE (L1) (L2) (L3) (L4) (L5) (L6) Blink (Hi speed) Check that the “ERROR” LED blinks, then press the [Enter] button once. For details, refer to the following table.
  • Page 7 2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Serial Communication Error (Serial Reverse Transfer Error) Detective Actuators: Detective details: When the indoor unit cannot receive the serial signal from Outdoor unit Outdoor unit Main PCB more than 2minutes after power ON, or the indoor unit cannot receive Outdoor unit Fan motor...
  • Page 8 Trouble shooting 2 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Serial Communication Error (Serial Forward Transfer Error) Detective Actuators: Detective details: When the outdoor unit cannot properly receive the serial signal from Indoor unit Controller PCB indoor unit for 10 seconds or more.
  • Page 9 Trouble shooting 3 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Wired Remote Controller Communication Error Detective Actuators: Detective details: Indoor unit Controller PCB When the indoor unit cannot properly receive the signal from Wired Remote Controller (Option) Wired Remote Controller for 1 minute or more.
  • Page 10 Indicate or Display: Trouble shooting 4 INDOOR UNIT Error Method: Refer to error code table. Fan Motor Drive Circuit Error Detective Actuators: Detective details: When a momentary power cut off. Indoor Unit Power Supply PCB When do not start fan motor. Forecast of Cause : 1.
  • Page 11 Trouble shooting 5 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Room Thermistor Error Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit Indoor unit thermistor is open or short is detected always. Indoor Temperature Thermistor Forecast of Cause : 1.
  • Page 12 Trouble shooting 6 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Heat Ex. Thermistor Error Detective Actuators: Detective details: Indoor Unit Controller PCB Indoor unit thermistor is open or short is detected always. Heat Exchanger (MID) Thermistor Forecast of Cause : 1.
  • Page 13 Trouble shooting 7 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Unit Fan Motor1 Error Detective Actuators: Detective details: Indoor unit Power Supply PCB When the condition that actual frequency of Indoor Fan is below 1/3 of target frequency is continued more than 56 seconds. Indoor unit fan motor Forecast of Cause: 1.
  • Page 14 Indicate or Display: Trouble shooting 8 INDOOR UNIT Error Method: Refer to error code table. Drainage Error Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit When Float switch is ON for more than 3 minutes. Float Switch Forecast of Cause : 1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure 4.
  • Page 15 Trouble shooting 9 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Unit Fan Motor2 Error Detective Actuators: Detective details: When the condition that actual frequency of Indoor Fan is Indoor unit Power Supply PCB below 1/3 of target frequency is continued more than 56 seconds. Indoor unit fan motor Forecast of Cause: 1.
  • Page 16 Indicate or Display: Trouble shooting 10 OUTDOOR UNIT Error Method: Refer to error code table. Inverter Error Detective Actuators: Detective details: Inverter PCB Error information received from Inverter PCB Forecast of Cause : 1. External cause. 2. Power supply to Filter PCB to Inverter PCB wiring disconnection, open 3.
  • Page 17 Trouble shooting 11 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. IPM Error Detective Actuators: Detective details: When more than normal operating current to IPM in Main PCB flows, Outdoor unit Main PCB the compressor stops. Compressor After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again.
  • Page 18 Indicate or Display: Trouble shooting 12 OUTDOOR UNIT Error Method: Refer to error code table. Discharge Thermistor Error Detective Actuators: Detective details: Discharge temperature thermistor short detected Discharge temperature thermistor Discharge thermistor open detected Forecast of Cause : 1. Connector connection failure, open 2.
  • Page 19 Indicate or Display: Trouble shooting 13 OUTDOOR UNIT Error Method: Refer to error code table. Compressor Thermistor Error Detective Actuators: Detective details: Compressor temperature thermistor short detected Compressor temperature thermistor Compressor thermistor open detected Forecast of Cause : 1. Connector connection failure, open 2.
  • Page 20 Indicate or Display: Trouble shooting 14 OUTDOOR UNIT Error Method: Refer to error code table. Heat Ex. Outlet Temp. Thermistor Error Detective Actuators: Detective details: Heat exchanger liquid temperature Heat exchanger outlet temperature thermistor short or open detected thermistor Forecast of Cause : 1.
  • Page 21 Indicate or Display: Trouble shooting 15 OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Thermistor Error Detective Actuators: Detective details: Outdoor temperature thermistor short or open detected Outdoor temperature thermistor Forecast of Cause : 1. Connector connection defective, open 2.
  • Page 22 Indicate or Display: Trouble shooting 16 OUTDOOR UNIT Error Method: Refer to error code table. Heat Sink Thermistor Error Detective Actuators: Detective details: Heat sink temperature thermistor (Built-in IPM) open/short detected Inverter PCB Forecast of Cause : 1. Inverter PCB failure If this error is displayed, replace Inverter PCB 02-19...
  • Page 23 Trouble shooting 17 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Current Sensor Error Detective details: Detective Actuators: When Input Current Sensor has detected 0A, while Inverter Compressor is Outdoor unit Main PCB operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation) Forecast of Cause : 1.
  • Page 24 Indicate or Display: Trouble shooting 18 OUTDOOR UNIT Error Method: Refer to error code table. Pressure Sencer Error Detective Actuators: Detective details: High pressure switch When the power was turned on, "high pressure switch : open" was detected. Forecast of Cause : 1.
  • Page 25 Trouble shooting 19 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Over Current Error Detective details: Detective Actuators: "Protection stop by overcurrent generation after inverter compressor start Outdoor unit Main PCB processing completed'' generated consecutively 10 times. Compressor * The number of generations is reset if the start-up of Transistor PCB...
  • Page 26 Trouble shooting 20 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Compressor Control Error Detective details: Detective Actuators: While running the compressor, if the detected rotor location is out of Outdoor unit Main PCB phase with actual rotor location more than 90°, Compressor the compressor stops.
  • Page 27 Trouble shooting 18 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Unit Fan Motor 1 Error Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit Main PCB after fan motor starts, fan motor stops.
  • Page 28 Trouble shooting 22 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Unit Fan Motor 2 Error Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit Main PCB after fan motor starts, fan motor stops.

  • Page 29: Heating Operation

    Trouble shooting 23 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. 4-Way Valve Error Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with Indoor Unit Controller PCB Circuit the room temperature, and either following condition is detected Heat Exchanger Temperature Thermistor continuously two times, the compressor stops.
  • Page 30 R410A DUCT type INVERTER 2 . TROUBLE SHOOTING...

  • Page 31: Error Display

    2 ERROR DISPLAY 2-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY 1. SELF - DIAGNOSIS AR-WAF1E hen "Er" in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed service personnel. Unit number (usually 0) Error code SU MO TU WE TH FR SA ex.
  • Page 32 2. ERROR CODE HISTORY DISPLAY Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller. 1. Stop the air conditioner operation. 2. Press the SET TEMPERATURE buttons simultaneously for 3 seconds or more to start the self-diagnosis. Error code Error history number SU MO TU WE TH FR SA...

  • Page 33: Outdoor Unit Display

    2-1-2 OUTDOOR UNIT DISPLAY 1. OUTDOOR UNIT Indicator PCB LEDs Buttons 2. ERROR DETECTION Display when an error occurs. PUMP PEAK POWER ERROR DOWN NOISE MODE (L1) (L2) (L3) (L4) (L5) (L6) Blink (Hi speed) Check that the “ERROR” LED blinks, then press the [Enter] button once. For details, refer to the following table.

  • Page 34: Trouble Shooting With Error Code

    2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Serial Communication Error (Serial Reverse Transfer Error) Detective Actuators: Detective details: When the indoor unit cannot receive the serial signal from Outdoor unit Outdoor unit Main PCB more than 2minutes after power ON, or the indoor unit cannot receive Outdoor unit Fan motor...
  • Page 35 Trouble shooting 2 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Serial Communication Error (Serial Forward Transfer Error) Detective Actuators: Detective details: When the outdoor unit cannot properly receive the serial signal from Indoor unit Controller PCB indoor unit for 10 seconds or more.
  • Page 36 Trouble shooting 3 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Wired Remote Controller Communication Error Detective Actuators: Detective details: Indoor unit Controller PCB When the indoor unit cannot properly receive the signal from Wired Remote Controller (Option) Wired Remote Controller for 1 minute or more.
  • Page 37 Indicate or Display: Trouble shooting 4 INDOOR UNIT Error Method: Refer to error code table. Fan Motor Drive Circuit Error Detective Actuators: Detective details: When a momentary power cut off. Indoor Unit Power Supply PCB When do not start fan motor. Forecast of Cause : 1.
  • Page 38 Trouble shooting 5 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Room Thermistor Error Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit Indoor unit thermistor is open or short is detected always. Indoor Temperature Thermistor Forecast of Cause : 1.
  • Page 39 Trouble shooting 6 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Heat Ex. Thermistor Error Detective Actuators: Detective details: Indoor Unit Controller PCB Indoor unit thermistor is open or short is detected always. Heat Exchanger (MID) Thermistor Forecast of Cause : 1.
  • Page 40 Trouble shooting 7 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Unit Fan Motor1 Error Detective Actuators: Detective details: Indoor unit Power Supply PCB When the condition that actual frequency of Indoor Fan is below 1/3 of target frequency is continued more than 56 seconds. Indoor unit fan motor Forecast of Cause: 1.
  • Page 41 Indicate or Display: Trouble shooting 8 INDOOR UNIT Error Method: Refer to error code table. Drainage Error Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit When Float switch is ON for more than 3 minutes. Float Switch Forecast of Cause : 1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure 4.
  • Page 42 Trouble shooting 9 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Unit Fan Motor2 Error Detective Actuators: Detective details: When the condition that actual frequency of Indoor Fan is Indoor unit Power Supply PCB below 1/3 of target frequency is continued more than 56 seconds. Indoor unit fan motor Forecast of Cause: 1.
  • Page 43 Indicate or Display: Trouble shooting 10 OUTDOOR UNIT Error Method: Refer to error code table. Inverter Error Detective Actuators: Detective details: Inverter PCB Error information received from Inverter PCB Forecast of Cause : 1. External cause. 2. Power supply to Filter PCB to Inverter PCB wiring disconnection, open 3.
  • Page 44 Trouble shooting 11 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. IPM Error Detective Actuators: Detective details: When more than normal operating current to IPM in Main PCB flows, Outdoor unit Main PCB the compressor stops. Compressor After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again.
  • Page 45 Indicate or Display: Trouble shooting 12 OUTDOOR UNIT Error Method: Refer to error code table. Discharge Thermistor Error Detective Actuators: Detective details: Discharge temperature thermistor short detected Discharge temperature thermistor Discharge thermistor open detected Forecast of Cause : 1. Connector connection failure, open 2.
  • Page 46 Indicate or Display: Trouble shooting 13 OUTDOOR UNIT Error Method: Refer to error code table. Compressor Thermistor Error Detective Actuators: Detective details: Compressor temperature thermistor short detected Compressor temperature thermistor Compressor thermistor open detected Forecast of Cause : 1. Connector connection failure, open 2.
  • Page 47 Indicate or Display: Trouble shooting 14 OUTDOOR UNIT Error Method: Refer to error code table. Heat Ex. Outlet Temp. Thermistor Error Detective Actuators: Detective details: Heat exchanger liquid temperature Heat exchanger outlet temperature thermistor short or open detected thermistor Forecast of Cause : 1.
  • Page 48 Indicate or Display: Trouble shooting 15 OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Thermistor Error Detective Actuators: Detective details: Outdoor temperature thermistor short or open detected Outdoor temperature thermistor Forecast of Cause : 1. Connector connection defective, open 2.
  • Page 49 Indicate or Display: Trouble shooting 16 OUTDOOR UNIT Error Method: Refer to error code table. Heat Sink Thermistor Error Detective Actuators: Detective details: Heat sink temperature thermistor (Built-in IPM) open/short detected Inverter PCB Forecast of Cause : 1. Inverter PCB failure If this error is displayed, replace Inverter PCB 02-19...
  • Page 50 Trouble shooting 17 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Current Sensor Error Detective details: Detective Actuators: When Input Current Sensor has detected 0A, while Inverter Compressor is Outdoor unit Main PCB operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation) Forecast of Cause : 1.
  • Page 51 Indicate or Display: Trouble shooting 18 OUTDOOR UNIT Error Method: Refer to error code table. Pressure Sencer Error Detective Actuators: Detective details: High pressure switch When the power was turned on, "high pressure switch : open" was detected. Forecast of Cause : 1.
  • Page 52 Trouble shooting 19 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Over Current Error Detective details: Detective Actuators: "Protection stop by overcurrent generation after inverter compressor start Outdoor unit Main PCB processing completed'' generated consecutively 10 times. Compressor * The number of generations is reset if the start-up of Transistor PCB...
  • Page 53 Trouble shooting 20 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Compressor Control Error Detective details: Detective Actuators: While running the compressor, if the detected rotor location is out of Outdoor unit Main PCB phase with actual rotor location more than 90°, Compressor the compressor stops.
  • Page 54 Trouble shooting 18 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Unit Fan Motor 1 Error Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit Main PCB after fan motor starts, fan motor stops.
  • Page 55 Trouble shooting 22 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Unit Fan Motor 2 Error Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit Main PCB after fan motor starts, fan motor stops.
  • Page 56 Trouble shooting 23 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. 4-Way Valve Error Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with Indoor Unit Controller PCB Circuit the room temperature, and either following condition is detected Heat Exchanger Temperature Thermistor continuously two times, the compressor stops.

  • Page 57: Cooling Operation

    Trouble shooting 24 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Discharge Temp. Error Detective details: Detective Actuators: °C "Protection stop by "discharge temperature during compressor Discharge temperature thermistor operation'''' generated 2 times within 24 hours. Forecast of Cause : 1.
  • Page 58 Indicate or Display: Trouble shooting 25 OUTDOOR UNIT Error Method: Refer to error code table. Compressor Temp. Error Detective details: Detective Actuators: °C "Protection stop by "compressor tempreture" during compressor Compressor temperature thermistor operation""generated 2 times within 24 hours Forecast of Cause : 1.
  • Page 59 Indicate or Display: Trouble shooting 26 OUTDOOR UNIT Error Method: Refer to error code table. Low Pressure Error Detective details: Detective Actuators: Suction pressure sensor "Protection stop by suction pressure 0.05MPa continued for 5 minutes" repeats 5 times within 2 hours. Forecast of Cause : 1.

  • Page 60: Trouble Shooting With No Error Code

    2-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 27 1. Power Supply failure 2. External cause Indoor Unit - No Power 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable.
  • Page 61 Forecast of Cause: Trouble shooting 28 1. Power Supply failure 2. External cause Outdoor Unit - No Power 3. 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 Installation Manual or Data &...
  • Page 62 Forecast of Cause: Trouble shooting 29 1. Setting/ Connection failure 2. External cause No Operation (Power is ON) 3. Electrical Component defective Check Point 1 : Check indoor and outdoor installation condition Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control. Or, check if there is an open cable connection.
  • Page 63 Forecast of Cause: Trouble shooting 30 1. Indoor Unit error 2. Outdoor Unit error No Cooling / No Heating 3. Effect by Surrounding environment 4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure Check Point 1 : Check Indoor Unit Does Indoor Unit FAN run on HIGH FAN? Is Air Filter dirty? Is Heat Exchanger clogged?
  • Page 64 Forecast of Cause : Trouble shooting 31 1. Abnormal installation (Indoor/ Outdoor) Abnormal Noise 2. Fan failure (Indoor/ Outdoor) 3. Compressor failure (Outdoor) Diagnosis method when Abnormal Noise is occurred Abnormal noise is coming from Indoor Unit. Abnormal noise is coming from Outdoor Unit. (Check and correct followings) (Check and correct followings) Is Main Unit installed in stable condition?

  • Page 65: Service Parts Information

    2-4 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting ) Abnormal noise Stops soon after starting up Does not start up Check if vibration noise by Is there open or loose connection Is there open or loose connection loose bolt or contact noise...
  • Page 66 SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) (WHITE) (BLACK) IPM PCB TM305 TM304 TM303 Inverter PCB BLACK WHITE Compressor (RED) Check Point 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor.
  • Page 67 SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector ( Loose connector or open cable ) EXPANSION VALVE COIL CN111 BLUE ORANGE YELLOW WHITE Check Point 2 : Check Coil of EEV Check Point 3 : Check Voltage from Main PCB.
  • Page 68 SERVICE PARTS INFORMATION 4 Indoor unit fan motor 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 : Check resistance of Indoor Fan Motor Refer to below.
  • Page 69 SERVICE PARTS INFORMATION 6 Active filter module Check Point 1 : Check Open or Short-circuit and Diode (D1) Remove connector, check the open or short-circuit and the diode in the module Check the open or short-circuit Terminal Resistance value Tester(+) Tester(-) (+IN) ( IN)
  • Page 70 SERVICE PARTS INFORMATION 7 Mounted on Transistor PCB) Check Point 1 Disconnect the connection wires between the Transistor PCB - Capacitor PCB and Transistor PCB - Inverter Compressor. Set the tester to the "Resistance" mode, and measure the resistance between the following terminals. TM301 (P) - TM305(U) / TM304(V) / TM303(W) TM302 (N) - TM305(U) / TM304(V) / TM303(W) Judge the result of...
  • Page 71 SERVICE PARTS INFORMATION 8 Thermistor Check Point : Check Thermistor resistance value Remove connector and check Thermistor resistance value. Temperature Resistance Value [ k ] [°C] Thermistor A Thermistor B Thermistor C Thermistor D - 20 105.4 - 10 27.8 58.2 27.4 20.7...
  • Page 72 SERVICE PARTS INFORMATION 9 Discharge Pressure Sensor Suction Pressure Sensor 1. Discharge Pressure Sensor Check Point : Check Voltage from Main PCB With the connector connected to the PCB, measure the voltage between CN91:3-4 of the Main PCB. CN91 PRESSURE WHITE SENSOR BLACK...

  • Page 73: Disassembly Process

    DISASSEMBLY PROCESS MODEL : ARTG45 / 54LHTA 1. Appearance SIDE VIEW BACK VIEW FRONT VIEW 2. CONTROL BOX COVER removal screw Hook 1) Remove the mounting screws 2) Remove the control box cover. (4 places). 3. POWER SUPPLY PCB, CONTROLLER PCB and FILTER PCB removal FILTER PCB POWER SUPPLY PCB CONTROLLER PCB...
  • Page 74 3-1. POWER SUPPLY PCB removal locking spacers 1) Remove the connectors and each wires. 2) Remove the locking spacers(4 places). 3-2. CONTROLLER PCB removal earth screw locking spacers 2) Remove the earth screw 1) Remove the connectors and each wires. and locking spacers(4 places).
  • Page 75 4. FAN MOTOR removal screw screw screw screw 1) Remove the mounting screws(13 places). Tape 3) Peel off the tapes. 2) Remove the PANEL TOP ASSY. Reuse the tape. screw screw 4) Remove the mounting screws(4 places). 5) Pull the CASING. MOTOR SHAFT 6) Loosen the MOTOR SHAFT screw.
  • Page 76 hook screw 9) Loosen the screw. 8) Take out the SIROCCO FAN and CASING. Unlock the point. Note at the installation. ■Please install it so that a motor band touches rubber. ■Insert SIROCCO FAN and MOTOR SHAFT reference D cutting position. Please insert it till a SIROCCO FAN stop.
  • Page 77 6. THERMISTOR removal 6-1 PIPE THERMISTOR screw 3) Remove the 4) Remove the 1) Remove the mounting 2) Remove the PIPE PANEL. THERMISTOR SPRING. THERMISTOR. screws(4 places) 6-2 ROOM THRMISTOR Remove the THERMISTOR. 7. DRAIN PAN removal screw Attention!! When remove the screw, please affix and remove the hand.
  • Page 78 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Mar. 2011 Printed in Japan...

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