Engineering manual
304
Indoor unit - Water overflow
Remote controller display A2
Possible reason
Float switch work abnormal
Float switch not connect to electrical board
Water pump work abnormal
Water pump not connect to electrical board
Drain pipe not install well or block
Unit electrical board abnormal
Diagnostic
No
Yes
Yes
Connect water pump and
restart
Change float switch
Check whether drain pipe
is blocked or installed
incorrect.
Connect well the wire and
restart again
Change this indoor unit’s
electrical board
Change water pump
No
Yes
Is float switch wire
broken?
Does water pump
connect to electrical
board at CN11?