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25
DIAGNOSIS AND SOLUTION (CONT.)
Indoor PCB/Display Board Communication Error ( )
Troubleshooting
Error Code
Malfunction decision conditions The indoor PCB does not receive feedback from the display board.
Supposed causes
Communication wire
Indoor PCB
Display board
Is it still displaying the error code?
The unit is functioning normally.
Check the wirings and connections.
Are all the connections
good?
Replace the indoor main PCB.
Does the error still exist?
Replace the display board.
Power o. Wait 2 minutes
then restart the unit.
Ensure a proper connection.
YES
NO
NO
YES
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