Fujitsu AU*G36LRLA Service Instruction page 70

Trouble shooting 23
OUTDOOR UNIT Error Method:
Current sensor error
Detective Actuators:
Outdoor unit Inverter PCB
Outdoor unit Filter PCB
Forecast of Cause :
1. Connection failure
Check Point 1-1 : Reset power supply and operate
Does error indication reappear?
YES
Check Point 2 :
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 3 : Check Filter PCB
Check Filter PCB : CN200, 1 - 3 pin
>> 40 seconds after compressor starts.
If it is higher than 0.2V, Inverter PCB is failure.
>> Replace Inverter PCB
If it is lower than 0.2V, Filter PCB is failure.
>> Replace Filter PCB
Indicate or Display:
Refer to error code table.
Detective details:
After compressor runs for 1 minute or more, and while it runs
in 50Hz or more.
When outdoor current value (A/D data) of Input Current Sensor
has detected [00H].
2. External cause 3. Filter PCB failure
NO
02-25
4. Inverter PCB failure
Check Point 1-2 : Check external cause such as noise
Check if the ground connection is proper.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).