Fujitsu AS* A09LEC Service Instruction page 45

Trouble shooting 18
OUTDOOR UNIT Error Method:
Excessive High Pressure
Protection On Cooling
Detective Actuators:
Outdoor unit Main PCB
Outdoor unit 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 15)
>> 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 Main PCB
If Check Point 1 ~ 5 do not improve the symptom, replace Main PCB.
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 67 °C and above.
2. Outdoor fan operation failure
4. Thermistor failure
02-20
5. EEV failure 6. Main PCB failure