Inverter Pcb Short Interruption Detection - Fujitsu Airstage J-II Service Manual

Trouble shooting 19
OUTDOOR UNIT Error Method:
Inverter PCB short interruption
detection
Detective Actuators:
Inverter PCB
Forecast of Cause :
1. Noise, momentary power failure, voltage drop
2. Power supply to Filter PCB (INV) to Inverter PCB wiring disconnection, open
3. Main PCB defective 4. Inverter PCB defective
Check Point 1 : Noise, momentary power failure, voltage drop
Check if temporary voltage drop was not generated.
Check if momentary power failure was not generated.
Check if ground is connection correctly or there are no related cables near the power line.
OK
Check Point 2 : Check the wiring (Power supply to Filter PCB (INV) to
Inverter PCB)
Connector and wiring connection state check
Cable open check
OK
Check Point 3 : Check Main PCB
Check Main PCB Power supply
OK
Check Point 4 : Replace Inverter PCB
Replace Inverter PCB.
Indicate or Display:
Outdoor Unit : E. 67. 2
Indoor Unit : No Display
Error Code : 67
Detective details:
''Momentary power failure" received from Inverter PCB
04-29