Eb (Communication Error Between The Indoor Pcb And Display Board) - Carrier 42QHP09E8S Service Manual

5.7

Eb (Communication error between the indoor PCB and display board)

Description: Indoor PCB does not receive feedback from Display board.
Recommended parts to prepare:
• Wiring mistake
• PCB faulty
• Display board malfunction
Troubleshooting and repair:
Power off, then restart the
unit 2 minutes later.
Check the wirings and
Replace the indoor main PCB.
Is the problem solved?
The unit operates normally.
 Page 68 
Is it still displaying
the error code?
YES
connection.
Is it normal?
YES
YES
NO The unit operates normally.
Correct the connection
NO
or replace the Wirings.
NO Replace the Display board.