Troubleshooting 26
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole. This picture and the value are only for reference, actual appearance
and value may vary
7.6 EH 0b (Indoor PCB / Display board communication error diagnosis and solution)
Description: Indoor PCB does not receive feedback from the display board.
Recommended parts to prepare:
• Communication wire
• Indoor PCB
• Display board
Troubleshooting and repair:
Is it still displaying
the error code?
The unit functions 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 off, then restart the unit 2 minutes
later
Ensure a proper connection
YES
NO
NO
YES
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