COMMUNICATION ERROR
Cause
If CO is displayed The Main board and Display have stopped communicating with each other.
Solution
Check the wiring at the left-hand hinge connections & the associated voltages.
DETAILS BELOW:
Continuity Test:
- Set meter to continuity and check the Rx/Tx lines from the Main PCB to the Left Door Hinge connector, this checks the wiring through the cabinet.
- Check continuity on Rx/Tx lines from the Left Door Hinge connector to the Display PCB, this checks the wiring in the door.
Note: If there is an open wire in the circuit the greatest chance will be the wiring for either the Rx/Tx in the door is open. It is very rare for a wire in the cabinet to open.
10 Responses
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