Haier Unitary smart series Service Manual page 175

6) Outdoor SPDU module over current protection
Outdoor indicator shows 00101.
Alarm condition: When compressor running, the module current is over 21A.
outdoor failure indicator shows
00101
check if the refrigerant is
too much or too less
no
check if the piping is
blocked
no
replace SPDU
module
7) Outdoor high pressure protection
Outdoor indicator shows 01000
Alarm condition: When compressor running, high pressure is over 4.5 MPa for 30
seconds continously.
outdoor failure indicator shows
01000
check if the refrigerant is too
much or less by the pressure
gauge
no
check if the piping is
blocked
no
if high pressure switch
is normal
8) Outdoor power supply is abnormal
Outdoor indicator shows 01010
Alarm condition: if power supply is not 50Hz as standard, which will affect the
normal communication and cause air conditioner bad operation.
outdoor indicator shows 01010
check if the wiring between
indoor and outdoor is correct
yes
check if power
supply is normal
yes
adjust refrigerant
yes
adjust piping
yes
adjust refrigerant
yes
adjust piping
yes
replace sensor
no
adjust wiring
no
adjust power supply as
50HZ 220-230VAC
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