Fujitsu ARYG72LHTA Service Instruction page 56

Trouble shooting 18
OUTDOOR UNIT Error Method:
Inverter Error
Detective Actuators:
Transistor PCB
Main PCB
Forecast of Cause : 1. External cause. 2. Power supply to Filter PCB to Transistor PCB wiring disconnection, open.
3. Transistor PCB failure. 4. Transistor PCB to Main PCB wiring disconnection, open.
5. Main PCB failure.
Check Point 1-1 :
Turn the power on again.
Error displayed again?
YES
Check Point 2 : Check the wiring (Power supply to Filter PCB to Transistor PCB)
Connector and wiring connection state check
Cable open check
OK
Check Point 3 : Transistor PCB
Replace Transistor PCB.
NO
Check Point 4 : Check the wiring (Transistor PCB to Main PCB)
Connector and wiring connection state check
Cable open check
OK
Check Point 5 : Main PCB
Replace Main PCB.
Indicate or Display:
Error code : 63
Detective details:
Error information received from Transistor PCB
Check Point 1-2 : External cause
Check if temporary voltage drop was not generated.
NO
Check if temporary open was not generated.
Check if ground is connected correctly or there are no related cables near the
power line.
02-20
Outdoor unit :
PUMP LOW
POWER
DOWN NOISE
ERROR
MODE (L1) (L2) (L3) (L4)
2 6 3
PEAK
CUT
(L5) (L6)