AirStage ARXB07LALH, Service Manual

Page: 93 / 207

Inverter PCB short interruption
detection
OK
OK
OK
Inverter PCB
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.
Cable open check
Check Point 2 : Check the wiring (Power supply to Filter PCB (INV) to
Inverter PCB)
Connector and wiring connection state check
Check Point 3 : Check Main PCB
Check Main PCB Power supply
Check Point 4 : Replace Inverter PCB
Replace Inverter PCB.
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
''Momentary power failure" received from Inverter PCB
Indoor Unit : No Display
Outdoor Unit : E. 67. 2
Error Code : 67
04-29
Trouble shooting 19
Indicate or Display:
Detective Actuators: Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :