Fujitsu ASU18RLB Service Instructions Manual page 38

Trouble shooting 11
OUTDOOR UNIT Error Method:
IPM Error
Detective Actuators:
Outdoor unit Main PCB
Outdoor unit Transistor PCB (14L)
Compressor
Forecast of Cause :
1. Defective connection of electric components
3. Outdoor Heat Exchanger clogged
5. Main PCB failure
Check Point 1 : Check connections of Outdoor Unit Electrical Components
Check if
the terminal connection
Check if connector is removed.
Check erroneous connection.
Check if cable is open.
>>Upon correcting the removed connector or miss-wiring, reset the power.
OK
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.
OK
Check Point 3 : Check Outdoor Fan
Check Outdoor Fan Motor. (Refer to Trouble shooting 18)
>> If the Fan Motor is failure, replace it.
OK OK
Check Point 4 : Check Compressor
Check Compressor.
(PARTS INFORMATION 2)
OK OK
Check Point 5 : Check Transistor PCB
Check Transistor PCB. (PARTS INFORMATION 7)
OK OK
Check Point 6 : Replace Main PCB
If Check Point 1 5 do not improve the symptom, change Main PCB.
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit
ERROR CODE : [E : 65]
Detective details:
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
is loose.
: Operation lamp: 6 time Flash, Timer lamp: 5 time Flash
Economy lamp: Continuous flash.
repeats 5 times, the compressor stops permanently.
2. Outdoor Fan Operation failure
4. Compressor failure
6. Transistor PCB failure
02-14