Pc40 Communication Error Between The Outdoor Main Chip And Compressor Driven Chip - Carrier 38MBRC Series Service Manual

38MBRC: Service Manual
PC 40 (Communication Error Between Outdoor Main PCB and IPM Board Diagnosis and Solution)
Description: The main PCB cannot detect the IPM board.
Recommended parts to prepare:
• Connection wires
• IPM board
• Outdoor main PCB
• Electric control box
Troubleshooting and repair:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Is there at least one LED in
the IPM board light?
?
No
Check the signal wire between
the IPM board and the main
the IPM board
board, is it connected properly ?
,
No
Reconnect and retry.
Does the error still appear?
No
Replace IPM board . Is the
Replace . Is the
system running normally?
No
Replace outdoor main board .
Is the system running
normally?
?
No
Replace the electric control box.
Yes
?
Yes
Yes
?
Yes
33
No
Trouble is resolved
Trouble is resolved