El 16(Communication Malfunction Between Adapter Board And Outdoor Main Board Diagnosis And Solution) - Mars Comfort-Aire Century VCD-SA Series Service Manual

7.25 EL 16(Communication malfunction between adapter board and outdoor main board
diagnosis and solution)
Description: The adapter PCB cannot detect the main control board.
Recommended parts to prepare:
• Connection wires
• Adapter board
• Outdoor main PCB
Troubleshooting and repair:
Power off, then restart the unit after 3 minutes.
Check the wirings and connections
Replace the outdoor main control
7.26 Indoor and outdoor mismatch malfunction diagnosis and solution
Description: Indoor and outdoor units are mismatched, the LED displays this code. Please replace the matching indoor
or outdoor unit.
Does a problem remain?
YES
Are all the
connections good?
YES
Replace the adapter main PCB
Does the error still exist?
YES
board
 Troubleshooting 49
NO The unit is operating normally
NO Ensure proper connections
NO The problem is solved

Service Manual - VCDxxSA