Fujitsu ASU09RL2 Service Instructions Manual page 39

Trouble shooting 14
OUTDOOR UNIT Error Method:
Trip detection
Detective Actuators:
Outdoor unit Main PCB
Compressor
Forecast of Cause :
1. Defective connection of electric components
4. 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 mis-wiring, reset the power.
OK
Check Point 2 : Check Heat exchanger
Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?
OK
Check Point 3 : Check Compressor
Check Compressor. (PARTS INFORMATION 2)
OK
Check Point 4 : Replace Main PCB
If Check Point 1 ~ 3 do not improve the symptom, change Main PCB.
Indicate or Display:
Refer to error code table.
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
2. Outdoor heat exchanger clogged
is loose.
repeats 5 times, the compressor stops permanently.
02-16
3. Compressor failure