Fujitsu AS*A09LKC Service Instructions Manual page 40

Trouble shooting 16
OUTDOOR UNIT Error Method:
Discharge Temperature Error
Detective Actuators:
Outdoor Unit Inverter PCB
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 Pipe Thermistor
Is it on the holder?
Is there a cable pinched?
>> Check characteristics of thermistor (Refer to Trouble shooting 6),
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 14)
>> If the Fan Motor is failure, replace it.
Indicate or Display:
Refer to error code table.
Detective details:
When the discharge temperature becomes higher than 115°C.
When detecting it 2 times within 24 hours, the compressor stops.
2. EEV failure 3. Gas leak, less
6. Outdoor Heat Exchanger clogged
MPa MPa
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.
02-18
OK
OK