Fujitsu AU*G36LRLA Service Instruction page 77

Trouble shooting 30
OUTDOOR UNIT Error Method:
Compressure temp. error
Detective Actuators:
Outdoor unit Main PCB
Compressor temperature thermistor
Forecast of Cause :
1. Valve is close
5. Outdoor fan failure
< Cooling mode >
Check Point 1 : Check if gas valve is open
If it is not open, open it and check the operation.
OK
Check Point 2 : Check EEV and Strainer
Are EEV and Strainer open?
(Refer to PARTS INFORMATION 3)
>> If EEV or Strainer is defective, replace it.
OK
Check Point 3 : Check if gas leak or less gas
Measure Gas pressure, if there is a leak, correct it.
>> If recharging refrigerant, make sure to perform
vacuuming and recharge the specified amount.
OK
Check Point 4 : Check Compressor temperature thermistor
Is it on the holder?
Is there a cable pinched?
>> Check characteristics of thermistor (Refer to Trouble shooting 19),
If defective, replace the thermistor.
OK
Check Point 5 : Check Outdoor heat exchanger
Is there any obstructing the air flow route?
Is there any clogging of outdoor unit Heat exchanger?
>> If clogged, clear the clog.
OK
Check Point 6 : Check Outdoor fan
Check Outdoor fan motor. (Refer to Trouble shooting 27)
>> If the Fan motor is failure, replace it.
Indicate or Display:
Refer to error code table.
Detective details:
When the compressor temperature becomes 110°C or more.
When detecting it 2 times within 24 hours,
the compressor stops permanently.
2. EEV failure 3. Gas leak, less
6. Outdoor heat exchanger clogged
MPa MPa
4. Compressor thermistor failure
< Heating mode >
Check Point 1 : Check if liquid valve is open
If it is not open, open it and check the operation.
Check Point 2 : Check EEV and Strainer
Are EEV and Strainer open?
(Refer to PARTS INFORMATION 3)
>> If EEV or Strainer is defective, replace it.
Check Point 7 : Replace Main PCB
OK
If Check Point 1 ~ 6 do not improve
the symptom, replace Main PCB.
02-32
OK
OK