Fujitsu AO*G09LTCN, Service Instructions Manual

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Trouble shooting 11
OUTDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 3 : Check Outdoor Fan
OK
OK
Check Point 6 : Replace Main PCB
OK OK
OK OK
Check Point 1 : Check connections of Outdoor Unit Electrical Components
IPM error
Outdoor unit Main PCB
Outdoor unit Transistor PCB (14L)
Compressor
1. Defective connection of electric components 2. Outdoor Fan Operation failure
3. Outdoor Heat Exchanger clogged 4. Compressor failure
5. Main PCB failure 6. Transistor PCB failure (For 14L)
Check if connector is removed.
Check if
the terminal connection
is loose.
Check erroneous connection.
Check if cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Check Point 2 : Check Outdoor Fan, Heat Exchanger
Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?
Is the Fan rotating by hand when operation is off ?
>> If the Fan Motor is locked, replace it.
Check Outdoor Fan Motor. (Refer to Trouble shooting 17)
>> If the Fan Motor is failure, replace it.
Check Point 4 : Check Compressor
(PARTS INFORMATION 2) Check Compressor.
If Check Point 1 5 do not improve the symptom, change Main PCB.
When more than normal operating current to IPM in Main PCB flows,
the compressor stops.
After the compressor restarts, if the same operation is repeated within 40sec,
the compressor stops again.
If and repeats 5 times, the compressor stops permanently.
02-15
OK OK
Check Point 5 : Check Transistor PCB (For 14L)
(PARTS INFORMATION 7) Check Transistor PCB.
Indicate or Display:
Refer to error code table.