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4. Troubleshooting
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"C-F0"
* Disconnect power.
* Unplug connectors from Sub PCB,
Wall Main PCB and New FM Main PCB.
* Check wire harness between
Wall main, New FM main and Sub PCBs.
* Check connector pins on Sub
Wall main and New FM main pcb
for short circuits..
Ok
Ok
Ok
No
No
* Replace Sub PCB and make sure it works
* Repair damaged harness or replace.
END
END
END
* Repair shorted pins or damaged
part of the circuit.
4-1 Failure Display Codes
Wall Main PCB
Sub PCB
New FM Main PCB
