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Fujitsu AOTG30LATL, Service Instruction

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Fujitsu AOTG30LATL Service Instruction Download Page 19

Refer to error code table.

Compressor Thermistor Error

DC

Compressor temperature thermistor

Compressor temperature thermistor short detected

Compressor thermistor open detected 

 

1. Connector connection failure, open

2. Thermistor failure

3. Main PCB failure

OK

OK

Check Point 1 : Check the connector connection and cable open

 

 

 

Connector connection state check
Cable open check

Check Point 2 : Check the thermistor

 

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)
* For the thermistor characteristics, refer to the "Service Parts Information 8".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN62:3-4) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Compressor temperature thermistor (CN62:3-4)

If the voltage does not appear, replace Main PCB

, and execute 

the check operation again.

02-16

Trouble shooting  13

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause : 

CN62

THERMISTOR (COMP SHELL1)

THERMISTOR (DIS.TEMP.1)

BL

AC

K

BL

AC

K

B

LA

C

K

B

LA

C

K

1 2

3 4

1 2

3 4

Summary of Contents for AOTG30LATL

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

Page 2: ...ES 3 MINUTES ST 01 12 1 12 4 WAY VALVE EXTENSION SELECT 01 12 1 13 AUTO RESTART 01 14 1 14 PUMP DOWN 01 13 1 15 COMPRESSOR PREHEATING 01 14 1 16 MINIMUM HEAT OPERATION 01 14 1 20 VARIOUS PROTECTIONS 01 18 1 21 COMPRESSOR STOP CONTROL 01 20 1 19 OFF DEFROST OPERATION CONTROL 01 17 6 REFRIGERANT CAUTION R410A 3 DISASSEMBLY PROCESS 2 1 2 OUTDOOR UNIT DISPLAY 2 1 1 WIRED REMOTE CONTROLLER DISPLAY 2 1 ...

Page 3: ...2 TROUBLE SHOOTING R410A DUCT type INVERTER ...

Page 4: ...or Pressure sensor Error Compressor Thermistor Error W AR WAF1E AR WDD1E hen Er in Temperature Display is displayed inspection of the air conditioning system is necessary Please consult authoilzed service personnel 1 SELF DIAGNOSIS SU MO TU WE TH FR SA Unit number usually 0 Error code ex Self diagnosis check Compressor Control Error Outdoor Unit Fan Motor 1 Error Outdoor Unit Fan Motor 2 Error 4 w...

Page 5: ... SET TEMPERATURE buttons simultaneously for 3 seconds or more to start the self diagnosis 4 Press the SET TEMPERATURE buttons simultaneously for 3 seconds or more or there is no key input for 60 seconds to stop the display 3 Press the SET TEMPERATURE button to select the error history number SU MOTU WETH FR SA Error code Error history number 0 1 2 3 4 5 6 7 F E d c b A 9 8 Lower Raise ...

Page 6: ... Thermistor Error Heat Sink Thermistor Error Current sensor Error Pressure sensor Error Heat Ex Liquid Middle Thermistor Error Compressor Thermistor Error Compressor Control Error Outdoor Unit Fan Motor 1 Error Outdoor Unit Fan Motor 2 Error 4 way Valve Error Discharge Temp Error Compressor Temp Error Low Pressure Error 2 2 2 2 2 2 2 2 2 2 2 1 1 1 5 6 3 6 5 7 1 7 2 7 3 7 3 7 4 7 7 8 4 8 6 8 6 9 4 ...

Page 7: ...n Manual or Data Technical Manual Check connection condition in control unit If there is loose connector open cable or mis wiring Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC198V AC220V 10 264V AC240V 10 appears at outdoor unit terminal L N When the indoor unit cannot receive the serial signal from Outdoor unit more than 2minutes after power ON or t...

Page 8: ...2 Check connection Check any loose or removed connection line of between indoor unit and outdoor unit If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check connection condition in control unit If there is loose connector open cable or mis wiring Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC198...

Page 9: ... failure Check correct the followings Check the connection of terminal between Wired Remote Controller and indoor unit and check if there is a disconnection of the cable When the indoor unit cannot properly receive the signal from Wired Remote Controller for 1 minute or more 02 06 Refer to error code table If it is DC13V Remote Control is failure Controller PCB is normal Replace Remote Control If ...

Page 10: ...le OK OK Check Point 2 Check connection of Connector Check if connector is removed Check erroneous connection Check if cable is open Upon correcting the removed connector or mis wiring reset the power Check Point 1 Check external cause at Indoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if ther...

Page 11: ...Power when reinstalling due to removed connector or incorrect wiring 6 5 8 0 10 0 12 5 15 8 20 2 25 9 33 6 3 59 4 35 5 3 Resistance value k OK OK Check Point 3 Check voltage of Controller PCB DC5 0V Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor DC5 0V If the voltage does not appear replace Controller PCB and execute the check operation again DC 02 08 Troubl...

Page 12: ...ck Point 2 Remove connector and check Thermistor resistance value 02 09 Trouble shooting 6 INDOOR UNIT Error Method Indicate or Display Indoor Heat Ex Thermistor Error Refer to error code table 31 7 39 6 49 7 62 9 80 3 103 134 176 17 1 20 8 25 6 Resistance value k Temperature C Temperature C 0 40 45 50 5 10 15 20 25 30 35 Resistance value k OK Check Point 3 Check voltage of Controller PCB DC5 0V M...

Page 13: ...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 excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down restart operation When the condition that actual frequency of Indoor Fan is below 1 3 of target frequency is continued more...

Page 14: ...ch failure 2 Shorted connector wire 3 Controller PCB failure 4 Drain pump failure 5 Hose clogging Check Point 2 Check Connector and Wire Check loose contact of CN000 ARTG30 36LHTA CN000 ARTG45 54LHTA and shorted wire pinched wire Replace Float switch if the wire is abnormal Check Point 4 Check Controller PCB If Check Point 1 3 do not improve the symptom change Controller PCB and execute the check ...

Page 15: ...inding open 3 Motor protection by surrounding temperature rise 4 Power Supply PCB failure 5 Indoor unit fan motor failure 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 excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down r...

Page 16: ...mporary open was not generated Check if ground is connected correctly or there are no related cables near the power line Check Point 2 Check the wiring Power supply to Filter PCB to Inverter PCB Connector and wiring connection state check Cable open check Replace Filter PCB and Inverter PCB Check Point 1 1 Turn the power on again Error displayed again Check Point 3 Replace Filter PCB INV and Inver...

Page 17: ... Outdoor Fan Heat Exchanger Is there anything obstructing the air distribution circuit Is there any clogging of Outdoor Heat Exchanger Is the Fan rotating by hand when operation is off If the Fan Motor is locked replace it Check Outdoor Fan Motor Refer to Trouble shooting 21 22 If the Fan Motor is failure replace it Check Point 4 Check Compressor PARTS INFORMATION 2 Check Compressor If Check Point...

Page 18: ...tion state check Cable open check Check Point 2 Check the thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN62 1 2 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replac...

Page 19: ...eristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN62 3 4 voltage value 5V Remove the thermistor from Main PCB check the voltage Compressor temperature thermistor CN62 3 4 If the voltage does not appear replace Main PCB and execute the check operation a...

Page 20: ...the thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN63 1 2 voltage value 5V Remove the thermistor from Main PCB check the voltage Heat exchanger outlet temperature thermistor CN63 1 2 If the voltage does not appear replac...

Page 21: ... thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN61 1 3 voltage value 5V Remove the thermistor from Main PCB check the voltage Outdoor temperature thermistor CN61 1 3 If the voltage does not appear replace Main PCB and ex...

Page 22: ...B Heat sink temperature thermistor Built in IPM open short detected 1 Inverter PCB failure 02 19 Trouble shooting 16 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause If this error is displayed replace Inverter PCB ...

Page 23: ...e 1 Defective connection of electric components 2 External cause 3 Main PCB failure Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause h...

Page 24: ...as detected Check Point 1 Check the high pressure switch connection state Connector and wiring connection state check Cable open check Check Point 2 Check the high pressure switch characteristics Switch characteristics check For the characteristics of high pressure switch refer to below Check Point 3 Replace Main PCB Change Main PCB and execute the check operation again 02 21 Pressure Sencer Error...

Page 25: ...ssor 1 Outdoor unit fan operation defective foreign matter on hear exchanger excessive rise of ambient temperature 2 Main PCB 3 Inverter compressor failure lock winding short 4 Transistor PCB IPM failure Protection stop by overcurrent generation after inverter compressor start processing completed generated consecutively 10 times The number of generations is reset if the start up of the compressor...

Page 26: ...r or mis wiring reset the power Refer to PARTS INFORMATION 2 For Compressor Terminal Main PCB While running the compressor if the detected rotor location is out of phase with actual rotor location more than 90 the compressor stops After the compressor restarts if the same operation is repeated within 40sec the compressor stops again If and repeats 5 times the compressor stops permanently Check Poi...

Page 27: ... Check Point 4 Check Output Voltage of Main PCB Check outdoor unit circuit diagram and the voltage Measure at Main PCB side connector If the voltage is not correct replace Main PCB When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts fan motor stops After fan motor restarts if the same operation within 60sec is repeated 3 times in a row compressor and fan motor ...

Page 28: ... Check Point 4 Check Output Voltage of Main PCB Check outdoor unit circuit diagram and the voltage Measure at Main PCB side connector If the voltage is not correct replace Main PCB When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts fan motor stops After fan motor restarts if the same operation within 60sec is repeated 3 times in a row compressor and fan motor ...

Page 29: ... is not proper replace 4 way valve OK OK Check Point 4 Replace Main PCB If Check Point 1 3 do not improve the symptom replace Main PCB Check Point 2 Check thermistor of Indoor unit Isn t it fallen off the holder Is there a cable pinched Check characteristics of thermistor Refer to Trouble shooting 5 6 If defective replace the thermistor Indoor Unit Controller PCB Circuit Heat Exchanger Temperature...

Page 30: ...2 TROUBLE SHOOTING R410A DUCT type INVERTER ...

Page 31: ...or Pressure sensor Error Compressor Thermistor Error W AR WAF1E AR WDD1E hen Er in Temperature Display is displayed inspection of the air conditioning system is necessary Please consult authoilzed service personnel 1 SELF DIAGNOSIS SU MO TU WE TH FR SA Unit number usually 0 Error code ex Self diagnosis check Compressor Control Error Outdoor Unit Fan Motor 1 Error Outdoor Unit Fan Motor 2 Error 4 w...

Page 32: ... SET TEMPERATURE buttons simultaneously for 3 seconds or more to start the self diagnosis 4 Press the SET TEMPERATURE buttons simultaneously for 3 seconds or more or there is no key input for 60 seconds to stop the display 3 Press the SET TEMPERATURE button to select the error history number SU MOTU WETH FR SA Error code Error history number 0 1 2 3 4 5 6 7 F E d c b A 9 8 Lower Raise ...

Page 33: ... Thermistor Error Heat Sink Thermistor Error Current sensor Error Pressure sensor Error Heat Ex Liquid Middle Thermistor Error Compressor Thermistor Error Compressor Control Error Outdoor Unit Fan Motor 1 Error Outdoor Unit Fan Motor 2 Error 4 way Valve Error Discharge Temp Error Compressor Temp Error Low Pressure Error 2 2 2 2 2 2 2 2 2 2 2 1 1 1 5 6 3 6 5 7 1 7 2 7 3 7 3 7 4 7 7 8 4 8 6 8 6 9 4 ...

Page 34: ...n Manual or Data Technical Manual Check connection condition in control unit If there is loose connector open cable or mis wiring Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC198V AC220V 10 264V AC240V 10 appears at outdoor unit terminal L N When the indoor unit cannot receive the serial signal from Outdoor unit more than 2minutes after power ON or t...

Page 35: ...2 Check connection Check any loose or removed connection line of between indoor unit and outdoor unit If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check connection condition in control unit If there is loose connector open cable or mis wiring Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC198...

Page 36: ... failure Check correct the followings Check the connection of terminal between Wired Remote Controller and indoor unit and check if there is a disconnection of the cable When the indoor unit cannot properly receive the signal from Wired Remote Controller for 1 minute or more 02 06 Refer to error code table If it is DC13V Remote Control is failure Controller PCB is normal Replace Remote Control If ...

Page 37: ...le OK OK Check Point 2 Check connection of Connector Check if connector is removed Check erroneous connection Check if cable is open Upon correcting the removed connector or mis wiring reset the power Check Point 1 Check external cause at Indoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if ther...

Page 38: ...Power when reinstalling due to removed connector or incorrect wiring 6 5 8 0 10 0 12 5 15 8 20 2 25 9 33 6 3 59 4 35 5 3 Resistance value k OK OK Check Point 3 Check voltage of Controller PCB DC5 0V Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor DC5 0V If the voltage does not appear replace Controller PCB and execute the check operation again DC 02 08 Troubl...

Page 39: ...ck Point 2 Remove connector and check Thermistor resistance value 02 09 Trouble shooting 6 INDOOR UNIT Error Method Indicate or Display Indoor Heat Ex Thermistor Error Refer to error code table 31 7 39 6 49 7 62 9 80 3 103 134 176 17 1 20 8 25 6 Resistance value k Temperature C Temperature C 0 40 45 50 5 10 15 20 25 30 35 Resistance value k OK Check Point 3 Check voltage of Controller PCB DC5 0V M...

Page 40: ...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 excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down restart operation When the condition that actual frequency of Indoor Fan is below 1 3 of target frequency is continued more...

Page 41: ...ch failure 2 Shorted connector wire 3 Controller PCB failure 4 Drain pump failure 5 Hose clogging Check Point 2 Check Connector and Wire Check loose contact of CN000 ARTG30 36LHTA CN000 ARTG45 54LHTA and shorted wire pinched wire Replace Float switch if the wire is abnormal Check Point 4 Check Controller PCB If Check Point 1 3 do not improve the symptom change Controller PCB and execute the check ...

Page 42: ...inding open 3 Motor protection by surrounding temperature rise 4 Power Supply PCB failure 5 Indoor unit fan motor failure 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 excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down r...

Page 43: ...mporary open was not generated Check if ground is connected correctly or there are no related cables near the power line Check Point 2 Check the wiring Power supply to Filter PCB to Inverter PCB Connector and wiring connection state check Cable open check Replace Filter PCB and Inverter PCB Check Point 1 1 Turn the power on again Error displayed again Check Point 3 Replace Filter PCB INV and Inver...

Page 44: ... Outdoor Fan Heat Exchanger Is there anything obstructing the air distribution circuit Is there any clogging of Outdoor Heat Exchanger Is the Fan rotating by hand when operation is off If the Fan Motor is locked replace it Check Outdoor Fan Motor Refer to Trouble shooting 21 22 If the Fan Motor is failure replace it Check Point 4 Check Compressor PARTS INFORMATION 2 Check Compressor If Check Point...

Page 45: ...tion state check Cable open check Check Point 2 Check the thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN62 1 2 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replac...

Page 46: ...eristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN62 3 4 voltage value 5V Remove the thermistor from Main PCB check the voltage Compressor temperature thermistor CN62 3 4 If the voltage does not appear replace Main PCB and execute the check operation a...

Page 47: ...the thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN63 1 2 voltage value 5V Remove the thermistor from Main PCB check the voltage Heat exchanger outlet temperature thermistor CN63 1 2 If the voltage does not appear replac...

Page 48: ... thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN61 1 3 voltage value 5V Remove the thermistor from Main PCB check the voltage Outdoor temperature thermistor CN61 1 3 If the voltage does not appear replace Main PCB and ex...

Page 49: ...B Heat sink temperature thermistor Built in IPM open short detected 1 Inverter PCB failure 02 19 Trouble shooting 16 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause If this error is displayed replace Inverter PCB ...

Page 50: ...e 1 Defective connection of electric components 2 External cause 3 Main PCB failure Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause h...

Page 51: ...as detected Check Point 1 Check the high pressure switch connection state Connector and wiring connection state check Cable open check Check Point 2 Check the high pressure switch characteristics Switch characteristics check For the characteristics of high pressure switch refer to below Check Point 3 Replace Main PCB Change Main PCB and execute the check operation again 02 21 Pressure Sencer Error...

Page 52: ...ssor 1 Outdoor unit fan operation defective foreign matter on hear exchanger excessive rise of ambient temperature 2 Main PCB 3 Inverter compressor failure lock winding short 4 Transistor PCB IPM failure Protection stop by overcurrent generation after inverter compressor start processing completed generated consecutively 10 times The number of generations is reset if the start up of the compressor...

Page 53: ...r or mis wiring reset the power Refer to PARTS INFORMATION 2 For Compressor Terminal Main PCB While running the compressor if the detected rotor location is out of phase with actual rotor location more than 90 the compressor stops After the compressor restarts if the same operation is repeated within 40sec the compressor stops again If and repeats 5 times the compressor stops permanently Check Poi...

Page 54: ... Check Point 4 Check Output Voltage of Main PCB Check outdoor unit circuit diagram and the voltage Measure at Main PCB side connector If the voltage is not correct replace Main PCB When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts fan motor stops After fan motor restarts if the same operation within 60sec is repeated 3 times in a row compressor and fan motor ...

Page 55: ... Check Point 4 Check Output Voltage of Main PCB Check outdoor unit circuit diagram and the voltage Measure at Main PCB side connector If the voltage is not correct replace Main PCB When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts fan motor stops After fan motor restarts if the same operation within 60sec is repeated 3 times in a row compressor and fan motor ...

Page 56: ... is not proper replace 4 way valve OK OK Check Point 4 Replace Main PCB If Check Point 1 3 do not improve the symptom replace Main PCB Check Point 2 Check thermistor of Indoor unit Isn t it fallen off the holder Is there a cable pinched Check characteristics of thermistor Refer to Trouble shooting 5 6 If defective replace the thermistor Indoor Unit Controller PCB Circuit Heat Exchanger Temperature...

Page 57: ... return Refer to Service Parts Information 3 4 Check Point 3 Check the outdoor unit fan heat exchanger Check for foreign object at heat exchanger Check if fan can be rotated by hand Motor check PARTS INFORMATION 7 Check Point 2 Check the EEV strainer Check Point 5 Check the refrigerant amount Leak check EEV open Strainer clogging check before and after EEV ACM oil return Refer to Service Parts Inf...

Page 58: ...t 5 Check the refrigerant amount Leak check 02 28 Cooling operation OK Heating operation Check Point 1 Check if 3 way valve gas side is open EEV open Strainer clogging check before and after EEV ACM oil return Refer to Service Parts Information 3 4 Check Point 2 Check the EEV strainer EEV open Strainer clogging check before and after EEV ACM oil return Refer to Service Parts Information 3 4 Check ...

Page 59: ...he outdoor unit ambient temperature Outdoor ambient temperature lower than operating range Outdoor unit EEV operation check Strainer not clogged Check Point 4 Check the outdoor unit EEV strainer clogging Indoor unit EEV operation check Strainer not clogged strainer clogging Suction pressure sensor characteristics check For the characteristics of the suction pressure sensor PARTS INFORMATION 9 Chec...

Page 60: ... power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding 02 30 2 3 TROUBLE SHOOTING WITH NO ERROR CODE Check Point 3 Check Electrical Components YES YES OK NO Check the voltage of power supply Check if AC198 264V appears at Outdoor Unit Terminal L N Ch...

Page 61: ... large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check the voltage of power supply Check if AC198 264V appear...

Page 62: ...f Power and check correct followings Is there loose or removed communication line of Indoor Unit and Outdoor Unit Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or elect...

Page 63: ...ts that obstruct the air flow route Check clogged Heat Exchanger Is the Valve open Is capacity of Indoor Unit fitted to Room size Any windows open Or direct sunlight Check connection pipe specified pipe length Pipe diameter Check any loose or removed communication line If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check if Strainer is clo...

Page 64: ...on grille and front panel normal Is Fan broken or deformed Is the screw of Fan loose Is there any object which obstruct the Fan rotation Is Main Unit installed in stable condition Is Fan Guard installed normally Check if vibration noise by loose bolt or contact noise of piping is happening Is Compressor locked Check Compressor PARTS INFORMATION 1 2 Water Leaking 1 Erroneous installation 2 Drain ho...

Page 65: ...mpressor due to clogged dirt or less oil Replace Compressor Replace Compressor Replace Compressor Stops soon after starting up Is there open or loose connection cable Is Gas Pipe Valve open Low Pressure is too low Check if Refrigerant is leaking Recharge Refrigerant Check if Strainer is clogged PARTS INFORMATION 3 If there is no failure the defect of Compressor can be considered Compression part b...

Page 66: ...ck terminal connection of Compressor loose or incorrect wiring Check winding resistance of each terminal If the resistance value is 0 or infinite replace Compressor If the symptom does not change with above Check 1 2 replace Main PCB 02 36 Resistance Value 0 432 8 at 20 C U RED V WHITE W BLACK IPM PCB TM303 TM304 TM305 RED WHITE BLACK Compressor Inverter PCB ...

Page 67: ...ck connection of connector Loose connector or open cable Remove connector check each winding resistance of Coil If Resistance value is abnormal replace EEV Remove Connector and check Voltage DC12V If it does not appear replace Main PCB Turn on Power and check operation noise If an abnormal noise does not show replace Main PCB When Valve is closed it has a temp difference between Inlet and Outlet I...

Page 68: ...rown DC voltage Vm No function Earth terminal GND Control voltage Vcc Speed command Vsp Feed back FG SERVICE PARTS INFORMATION 4 Check Point 1 Check rotation of Fan Indoor unit fan motor 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 Circuit te...

Page 69: ...utput voltage of compressor stopping Active Filter Module is detective Replace Active Filter Module Terminal Resistance value L2 L1 L1 L2 P P Control Box N N IN IN IN IN Tester Tester Check the open or short circuit L2 P P N L2 L2 Check the diode 0 360k 720k 1 69M 20 360k 20 20 Ref value 1 1 88M Ref value 2 1 40M Ref value 1 2 28M Ref value 2 Terminal Resistance value Tester Tester 1 32M Ref value...

Page 70: ...de and measure the resistance between the following terminals Set the tester to the Diode mode and measure the voltage value between the following terminals Judge the result of as follows Judge the result of as follows TM301 P TM305 U TM304 V TM303 W TM302 N TM305 U TM304 V TM303 W P P P U V W N N N U V W U V W P P P U V W N N N Over 2k Including Over 2k Including Over 20k Including Terminal Teste...

Page 71: ...or D 20 10 5 0 5 10 15 20 25 30 40 50 60 70 80 90 100 110 120 168 6 129 8 100 9 79 1 62 6 49 8 40 0 26 3 17 8 12 3 8 7 6 3 4 6 3 4 2 6 2 0 27 8 21 0 16 1 12 4 9 6 7 6 6 0 4 8 3 8 2 5 1 7 1 2 105 4 58 2 44 0 33 6 25 9 20 2 15 8 12 5 10 0 8 0 5 3 3 6 27 4 20 7 15 8 12 2 9 5 7 5 5 9 4 7 3 8 2 5 1 7 1 2 0 8 0 6 0 4 0 3 Applicable Thermistors Discharge temp TH Comprssor temp TH Outdoor temp TH Heat sin...

Page 72: ...cteristics of pressure sensor 4 5 5 0 0 5 0 Output DCV Pressure MPa DC Check Point Check Voltage from Main PCB DC With the connector connected to the PCB measure the voltage between CN92 2 3 of the Main PCB 2 Suction Pressure Sensor Characteristics of pressure sensor 3 5 1 7 0 5 0 Output DCV Pressure MPa DC 02 42 1 1 3 3 WHITE PRESSURE SENSOR HIGH BLACK 2 2 RED PS 1 1 3 3 WHITE PRESSURE SENSOR LOW...

Page 73: ...WER SUPPLY PCB CONTROLLER PCB and FILTER PCB removal DISASSEMBLY PROCESS POWER SUPPLY PCB screw 1 Remove the mounting screws 4 places Hook 2 Remove the control box cover CONTROLLER PCB FILTER PCB FRONT VIEW SIDE VIEW MODEL ARTG45 54LHTA BACK VIEW ...

Page 74: ...e connectors and each wires 2 Remove the earth screw and locking spacers 4 places locking spacers 3 3 FILTER PCB removal 1 Remove the connectors each wires and terminal wire black white red 3 Remove the terminal bracket earth screw 2 Remove the mounting screws 2 places earth screw 4 Remove the earth screw and locking spacers 5 places locking spacers Hook screw ...

Page 75: ... places screw screw screw screw 2 Remove the PANELTOPASSY screw screw 4 Remove the mounting screws 4 places 6 Loosen the MOTOR SHAFT screw 7 Slide the left with the SIROCCO FAN and CASING 5 Pull the CASING Tape Reuse the tape MOTOR SHAFT 3 Peel off the tapes ...

Page 76: ...FAN Insert SIROCCO FAN and MOTOR SHAFT reference D cutting position Please insert it till a SIROCCO FAN stop Please install it so that a motor band touches rubber 2 Tighten the screw 1 Insert it till a SIROCCO FAN stop 9 Loosen the screw 8 Take out the SIROCCO FAN and CASING screw hook Unlock the point MOTOR SHAFT NG OK ...

Page 77: ...g screws 4 places 3 Remove the THERMISTOR SPRING Remove the THERMISTOR 4 Remove the THERMISTOR screw 03 05 7 DRAIN PAN removal screw 2 Remove the PIPE PANEL 1 Remove the mounting screws 2 places 2 Remove the DRAIN PAN 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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