Carrier 40MAHB Series Service Manual page 26

40MAHB: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
Indoor PCB/Display Board Communication Error (EH06)
Description: The indoor PCB does not receive feedback from the display board.
Recommended parts to repair:
• Communication wire
• Indoor PCB
• Display board
Troubleshooting
Wait 2 minutes then restart the unit.
Is it still displaying the error code?
Check the wirings and connections.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Power off.
YES
Are all the connections
good?
YES
Replace the indoor main PCB.
Does the error still exist?
Replace the display board.
The unit functions as designed.
NO
Ensure a proper connection.
NO
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