Fujitsu AUXB04GALH Service Manual page 118

Trouble shooting 30-1
OUTDOOR UNIT Error Method:
Outdoor unit microcomputer
self-check error
Detective Actuators:
Outdoor unit Main PCB
Forecast of Cause :
1. Noise, momentary open, voltage drop
Check Point 1-1 : Turn the power on again.
Error generated again and the power was turned back on?
YES
Check Point 2 : Check Outdoor Unit electric components
Check all connectors (loose connector or incorrect wiring)
Check any shortage or corrosion on PCB.
OK
Check Point 3 : Replace Main PCB
Change Main PCB and set up the original address.
Indicate or Display:
E62. 9
Outdoor Unit : E. 6 2. 9
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / 6 2
Detective details:
When the error is detected by the self-diagnosis of a microcomputer
2. Defective connection of electric component
04-42
Filter LED Continuous Flash.
Check Point 1-2 : Noise, momentary open, voltage drop
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.
3. Main PCB defective
NO