Service Manual -
B-VMHxxAV-1
Troubleshooting 48
7.24 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:
YES
Power off, then restart the unit after 3 minutes.
Does the error still exist?
Replace the outdoor main control
board
Does a problem remain?
The unit is operating normally
NO
Check the wirings and connections
YES
Are all the
connections good?
Ensure proper connections
NO
YES
Replace the adapter main PCB
The problem is solved
NO
7.25 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.
Summary of Contents for Comfort-Aire Century A-VMH18SV-1
Page 30: ...Service Manual B VMHxxAV 1 ...
Page 37: ...Service Manual B VMHxxAV 1 Outdoor Unit 3 3 Panel Plate X430 Square grille ...
Page 38: ...Service Manual B VMHxxAV 1 Outdoor Unit 4 4 Panel Plate D30 Square grille ...
Page 39: ...Service Manual B VMHxxAV 1 Outdoor Unit 5 5 2 Service Place Minimim 4 Recommended 12 ...
Page 42: ...Service Manual B VMHxxAV 1 Outdoor Unit 8 8 A VMH18SV 1 A VMH24SV 1 ...
Page 45: ...Service Manual B VMHxxAV 1 ...
Page 103: ...Service Manual B VMHxxAV 1 Troubleshooting 15 ...