Engineering manual
303
2 Indoor unit troubleshooting
Indoor unit - Mode conflict
Remote controller display A1
Possible reason
Unit mode conflict to the system operation mode
Master indoor unit change mode
Unit electrical board fault
Diagnostic
Yes
Stop using the indoor unit or change
the unit’s mode
Whether the indoor unit’s mode is
conflicted with Master indoor
unit’s mode
Check whether the indoor
unit’s mode is conflicted with
outdoor operation mode
Stop using the indoor unit or
change the unit’s mode
No
Change this indoor unit’s electrical
board
Yes
No
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