Fujitsu AS*A09LKC Service Instructions Manual page 34

Trouble shooting 10
INDOOR UNIT Error Method:
Power Supply Frequency
Detection Error
Detective Actuators:
Indoor Unit Controller PCB
Forecast of Cause:
1. Connection failure
Check Point 1-1 : Reset the power supply and operate
Does error indication reappear?
YES YES
Check Point 2 : Check connection
Check any loose or removed connection line of
between indoor unit and outdoor unit.
>> If there is an abnormal condition, correct it by
referring to Installation Manual or Data &
Technical Manual.
Check connection condition in control unit.
(If there is loose connector, open cable or mis-wiring.)
OK
Check Point 3 : Check the voltage of power supply
Check the voltage of power supply
>> Check if AC198(AC220V-10%) - 264V(AC240V+10%) appears
at outdoor unit terminal L - N.
OK
Check Point 4 : Replace Controller PCB
If Check Point 1 ~ 3 do not improve the symptom, replace Controller PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When power frequency is not detected by 4 seconds after power-on.
2. External cause 3. Controller PCB failure
NO
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).
02-12