Fujitsu Inverter Halcyon ASU12RMLQ, Service Instruction

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Trouble shooting 33
INDOOR UNIT
OUTDOOR UNIT Error Method:
Indicate or Display:
Refer to error code table.
Detective Actuators:
Detective details:
Forecast of Cause :
Compressor temperature error
Outdoor Unit Main PCB Circuit
Compressor Temperature Thermistor
02-38
When the compressor temperature becomes higher than 125°C,
the compressor stops.
Check Point 1 : Check if Gas Valve is open
If it is not open, open it and check the operation.
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.
Check Point 5 : Check Outdoor FAN, Heat Exchanger
Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?
Is the Fan rotating? (Check by hand and if it is locked, replace the motor)
Check Outdoor Fan Motor.
>>If the Fan Motor is defective, replace it.
Check Point 4 : Check Compressor Thermistor
Isn’t it fallen off the holder?
Is there a cable pinched?
>> Check characteristics of thermistor (Refer to Trouble shooting 12),
If defective, replace the thermistor
Check Point 2 : Check EEV and Strainer
Are EEV and Strainer open?
(Refer to PARTS INFORMATION 4)
>>If EEV or Strainer is defective, replace it.
OK OK
OK
OK
OK
OK
MPa MPa
1. Valve is close 2. EEV failure 3. Gas Leak, less 4. Compressor Thermistor failure
5. Outdoor Fan Operation failure 6. Outdoor Heat Exchanger clogged
< Cooling mode >
< 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 4)
>>If EEV or Strainer is defective, replace it.