Fujitsu Comfort Series Service Manual page 30

Troubleshooting 4
OUTDOOR UNIT Error Method:
Outdoor unit main PCB model
information error
Detective Actuators:
Outdoor unit Main PCB
Forecast of Cause:
1. External cause (Noise, temporary open, voltage drop)
Check Point 1-1 : Reset Power Supply and operate
Does Error indication show again?
YES
YES
Check Point 2 : Replace Main PCB
Change Main PCB.
Indicate or Display:
Green 6 flash / Red 2 flash
Detective details:
Access to EEPROM failed due to some cause after outdoor unit started.
2. Main PCB failure
NO
Check Point 1-2 : Check external cause
Check if temporary voltage drop was not generated.
Check if momentary open was not generated.
Check if ground is connection correctly or there are no related
cables near the power line.
03-05
Outdoor unit : No indication