Haier HSU-18HEA03/R2(DB)-I Service Manual page 63

Turn o ff s
Does fan rotate
Yes
Tu
Does it rotate?
Yes
Stop fan motor
Check output of fan
motor connector
Is rotation number
command pulse
generated?
HSU-18HEA03/R2(DB)-I
NO
No
No
Replace indoor
unit PCB
Replace fan motor
Turn o ff
fan motor connector
Check outpue of fan motor connector
Is motor
DC310 gengerated ?
Is motor c ontrol
Is rotation number
commamd voltage
DC1 generated?
No
Replace indoor unit PCB
61
Service Diagnosis
and d isconnect
turn
NO
v oltage
Replace indoor unit PCB
Yes
NO
?
Replace indoor unit PCB
Yes
Yes
Replace fan
motor
Domestic Air Conditioner