Carrier 40MAHB Series - PCB Communication Error (EH06); EH06 Error Troubleshooting Steps

40MAHB: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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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
Is it still displaying the error code? The unit functions as designed.
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