Service Manual -
B-VMHxxAV-1
Troubleshooting 47
7.23 EH 0b(Communication error between indoor two chips diagnosis and solution)
Description
: Indoor PCB main chip does not receive feedback from another chip.
Recommended parts to prepare:
• Indoor main board
• Adapter board
Troubleshooting and repair:
Check the connection wires
between the adaptor board and
the main board, is it connected
properly?
Reconnect and retry. Is the
error still displayed?
Replace the transfer board. Is
the system running normally?
Replace indoor main board.
Yes
No
No
No
Trouble is resolved
Yes
Shut off the power supply and
turn it on 2 minutes later.
Is it still displaying
the error code?
Yes
Yes
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 ...