Haier HSU12XHK, Service Manual

Page: 37 / 71

HSU09/12XHK-SM Codes and Description
Domestic Air Conditioner
34
NO
YES
YES
NO
YES
NO
YES
whether terminal CN8
and CN9 on indoor PCB
well inserted or not?
Pull out and reinsert the terminals
Electrify the machine again and turn it on in the cooling
operation
Measure whether there is voltage 60VAC-115VAC
between the red wire and the black wire of Terminal CN9
on the indoor mainboard.
NO
the indoor mainboard is damaged and need replace
Check whether motor can run when turn on the unit
the indoor motor is damaged and need replace
When fan motor is running Measure whether there is
voltage pulse between the middle wire and the black side
wire of Terminal CN8 on the indoor mainboard.
the motor of the indoor unit is damaged and need
replace
the indoor mainboard is damaged and need replace