Haier AC242ACEAA [366/408] Troubleshooting

Haier AU48NAIERA [366/408] Troubleshooting
re
p
lace PCB
yes
replace sensor
no
no
adjust piping
outdoor indicator shows 
yes
adjust refrigerant
check if the system
piping is blocked
check if refrigerant is too
much or too less
check if discharging temp.
sensor value is normal
no
yes
5) Compressor discharging temperature protection
Outdoor indicator shows 00100.
Alarm condition: Within half an hour after compressor is running, compressor discharging temp. is over 120degree
for 3 times continously.
adjust piping
Outdoor indicator shows 00101.
Alarm condition: When compressor running, the module current is over 21A.
6) Outdoor SPDU module over current protection
replace SPDU
module
adjust refrigerant
yes
no
yes
no
outdoor failure indicator shows
00101
check if the refrigerant is
too much or too less
check if the piping is
blocked
replace sensor
yes
adjust piping
adjust refrigerant
yes
check if the piping is
blocked
Outdoor indicator shows 01000
Alarm condition: When compressor running, high pressure is over 4.5 MPa for 30
seconds continously.
7) Outdoor high pressure protection
outdoor failure indicator shows
01000
yes
no
no
check if the refrigerant is too
much or less by the pressure
gauge
if high pressure switch
is normal
Troubleshooting
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