Haier AB12CS1ERA Service Manual page 406

Module current detect circuit failure
Check if wire between IPM
and compressor is correct
Y
Replace power
module
Suction temperature too high
In heating mode:
Check if there is power
supply output from O.D.
PCB for the 4 way valve
N
If the four way valve is
reversing successful?
In cooling mode:
Check if the stop valve is not
opened
N
If the E.E.V is not been
plugged to the 0.D.
PCB?
N
If the refrigerant is
lacked
N
Correct the wire due to diagram
Y
Replace the O.D. PCB
Y
Replace the four way valve
Y
Open the stop valve
Y
Plug the E.E.V to the 0.D. PCB
Y
Recharge the refrigerant
404
Super Match