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7.6
E7/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
:
Power off, then restart the unit
2 minutes later
Is it still displaying the error code?
YES
Check the wirings and connections
Are all the connections
good?
YES
Replace the indoor main PCB
Does the error still exist?
Replace the display board
Troubleshooting
NO
The unit functions normally
NO
Ensure a proper connection
27
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