Fujitsu AMUG24LMAS Service Manual page 72

Troubleshooting 17
IPM error
Detective actuators:
Outdoor unit main PCB
Compressor
Transistor PCB
Detective details:
When more than normal operating
①
current to IPM in main PCB flows,
the compressor stops.
After the compressor restarts.
②
If the same operation is repeated
within 40sec,
the compressor stops.
If and repeats 5 times,
③ ① ②
the compressor stops permanently.
Forecast of cause:
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
Indicate or Display:
Indoor unit
Operation lamp: 6 times Flash,
Timer lamp
Wired remote
Error code : [E : 65]
Outdoor unit (AOUG36/48LMAS1)
Mode Error
2
: Light OFF
Test 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
Test 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
Test 3 : Check outdoor fan
Check Outdoor Fan Motor. (Refer to Troubleshooting 26)
>> If the Fan Motor is failure, replace it.
OK
Test 4 : Check compressor
Check Compressor. (PARTS INFORMATION 2)
OK
Test 5 : Check transistor PCB
Check Transistor PCB
>>If Transistor PCB is abnormal, replace it.
OK
Test 6 : Replace main PCB
If Test 1 - 5 do not improve the symptom, change Main PCB.
03-24
: 5 times Flash
A B C D E
6
5
: Light ON n : n times blinking
is loose.
F