Fujitsu AS*A09LKC Service Instructions Manual page 41

Trouble shooting 17
OUTDOOR UNIT Error Method:
Excessive High Pressure
Protection On Cooling
Detective Actuators:
Outdoor Unit Inverter PCB
Outdoor Fan Motor
Heat Exchanger Temp. Thermistor
Outdoor unit EEV
Forecast of Cause :
1. Connection failure
3. Outdoor Heat Exchanger clogged
Check Point 1 : Check connections condition in control unit
Check if the terminal connection is loose.
Check if connector is removed.
Check if connector is erroneous connection.
Check if cable is open.
>> Upon correcting the removed connector or mis-wiring, reset the power.
OK
Check Point 2 : 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 cloge it.
OK
Check Point 3 : Check Outdoor Fan
Check Outdoor Fan Motor. (Refer to Trouble shooting 14)
>> If the Fan Motor is failure, replace it.
OK OK
Check Point 4 : Check Thermistor
Check Thermistor. (Refer to Trouble shooting 7)
>> If the Thermistor is failure, replace it.
OK OK
Check Point 5 : Check EEV
Check EEV. (PARTS INFORMATION 3)
>> If the EEV is failure, replace it.
OK OK
Check Point 6 : Replace Inverter PCB
If Check Point 1 ~ 5 do not improve the symptom, replace
Indicate or Display:
Refer to error code table.
Detective details:
In cooling operation, after 1 minute or more compressor starts,
when outdoor heat exchanger temperature is 68 °C and above.
2. Outdoor Fan operation failure
4. Thermistor failure
Inverter PCB
02-19
5. EEV failure 6. Inverter PCB failure
.