Outdoor Unit Transmission Pcb Parallel Communication Error - Fujitsu Airstage J-II Service Manual

Trouble shooting 20
OUTDOOR UNIT Error Method:
Outdoor Unit transmission PCB
Parallel Communication Error
Detective Actuators:
Outdoor unit Main PCB
Communication PCB
Forecast of Cause :
1. Noise
3. Communication PCB defective
Check Point 1-1 : Turn the power
on again.
Error displayed again?
YES
Check Point 2 : Check the communication PCB connection
Communication PCB connection check
OK
Check Point 3 : Check the communication PCB
Communication PCB check
OK
Check Point 4 : Replace Main PCB
Change Main PCB and set up the original address.
Indicate or Display:
Outdoor Unit : E. 69. 1
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Error Code : 69
Detective details:
Parallel communication (communication between main CPU and
communication PCB ) failed 5 times.
2. Communication PCB connection defective
4. Main PCB defective
Check Point 1-2 : Noise
NO
Check if ground is connection correctly or there are
no related cables near the power line.
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