Midea M2OC1-18HRDN1-Q

8.3.2.3 Communication malfunction between IPM board and outdoor main board
No
Check whether the IPM board has error display
Replace IPM board
Yes
Insert the connecting wiring between the IPM module and the main
board well over again
Trouble is solved
Yes
No
Replace the IPM board
No
Trouble is solved
Yes
No
Replace outdoor PCB
Replace the electric control box
Trouble is solved
Yes
The problem is not
resolved.