Fujitsu AS* A09LEC Service Instruction page 40

Trouble shooting 13
OUTDOOR UNIT Error Method:
CT Error
Detective Actuators:
Outdoor unit Main 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 : Replace Main PCB
If Check Point 1 ~ 2 do not improve the symptom,
replace Main PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When Input Current Sensor has detected 0A,
while Inverter Compressor is operating at higher than 56rps,
after 1minute upon starting the Compressor.
(Except during the defrost operation)
2. External cause 3. Main PCB failure
NO
02-15
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).