Carrier 40MBFAQ Service Manual

40MBFAQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
31
DIAGNOSIS AND SOLUTION (CONT.)
EH 0b (Communication error between display board and main board Diagnosis and Solution)
Description: The indoor PCB does not receive feedback from the display board
Recommended parts to prepare:
•Communication wire
• Indoor PCB
• Display board
Troubleshooting
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 o, then restart the unit
2 minutes later.
Ensure a proper connection.
YES
NO
NO
YES

Carrier 40MBFAQ Specifications

General

Brand	Carrier
Model	40MBFAQ
Category	Heater
Language	English