Discharge Temperature Error - Fujitsu AB A30LBT Series Service Instruction

Trouble shooting 9
OUTDOOR UNIT Error Method:

Discharge temperature error

Detective Actuators:
Outdoor Unit Main PCB Circuit
Discharge Pipe Temperature Thermistor
Forecast of Cause:
1. Valve is close
5. Outdoor Fan Operation 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 Discharge Thermistor
Isn't it fallen off the holder?
Is there a cable pinched?
>> Check characteristics of thermistor (Refer to Trouble shooting 8).
If defective, replace the thermistor.
OK
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.
Indicate or Display:
Refer to error code table.
Detective details:
2. EEV failure 3. Gas Leak, less
6. Outdoor Heat Exchanger clogged
When the discharge temperature becomes higher than 110°C,
the compressor stops.
After the compressor restarts, if the same operation is repeated,
the compressor stops permanently.
4. Discharge 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.
MPa MPa
02-13
OK
OK