Fujitsu AOU30RLXEH, Service Instruction

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OK
OK
Test 3 : Replace Main PCB
If Test 1 or 1, 2 do not improve the symptom, change Main PCB.
Test 2 : Check Transistor PCB (IPM)
>> If IPM is abnormal, replace Transistor PCB.
OK
Test 4 : Replace Compressor
If Test 3 do not improve the symptom, change Compressor.
1. Outdoor unit fan operation defective, foreign matter on heat exchanger,
excessive rise of ambient temperature
2. Main PCB 3. Inverter compressor failure (lock, winding short) 4. Transistor PCB (IPM) failure
No obstructions in air passages?
Heat exchange fins clogged
Outdoor unit fan motor check
Ambient temperature not raised by the effect of other heat sources?
Discharged air not sucked in?
Test 1 : Check the outdoor unit fan operation, heat exchanger, ambient temperature
Check IPM. (SERVICE PARTS INFORMATION 8)
Trouble shooting 26
OUTDOOR UNIT Error Method:
Over Current Error
Outdoor unit main PCB
Compressor
Transistor PCB
“Protection stop by overcurrent generation after inverter compressor start
processing completed” generated consecutively 10 times.
*The number of generations is reset if the start-up of the compressor succeeds.
Detective Actuators: Detective details:
Indicate of Display:
Forecast of Cause:
Outdoor unit :
POWER
MODE
ERROR
2
9
(L1) (L2) (L6) (L5) (L4) (L3)
4
PUMP
DOWN
LOW
NOISE
PEAK
CUT
02-29
Indoor Unit :
Operation lamp: 9 times Flash,
Timer lamp : 4 times Flash
ERROR CODE : [E : 94]
n: n times blinking : Light ON : Light OFF