Pc 40(Communication Error Between Outdoor Main Pcb And Ipm Board Diagnosis And Solution) - Mars Comfort-Aire Century VCD-SA Series Service Manual

Service Manual - VCDxxSA
7.13 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:
Is there at least one LED in the
compressor driven chip light?
No
Check the signal wire between the
Compressor driven chip and the
main board, is it connected
properly?
No
Reconnect and retry. Is the
error still displayed?
No
Replace Compressor driven
Chip. Is the system running
normally?
No
Replace outdoor main board.
Is the system running
normally?
No
Replace the electric control box
 Troubleshooting 36
Yes
Yes
No
Yes
Yes
Problem is resolved
