Haier AC122ACERA [360/408] Troubleshooting

Haier AC122ACEAA [360/408] Troubleshooting
2.2 For DC inverter units (*ERA)
2.2.1 For AU122AEERA
yes
if the refrigerant
is normal
improve the ventilation
condition
no
no
stop the unit, restart up until power
module temperature has reduced
yes
if compressor wiring is
correct
yes
if compressor winding is normal, and
the each phase resistor is in balance
no
compressor can
not start up
no
wiring correctly
no
replace compressor
Alarm condition: ambient temperature sensor is in short circuit or open circuit
if sensor is fixed
well
Relocate
reconnect
no
check if the wiring is
correct according to
wiring diagram
Is sensor short-circuit
or open-circuit?
Replace sensor
Is sensor resistance
acceptable?
Replace sensor
yes
yes
yes
no
no
no
1) Sensor failure
Replace PCB
Check if the power
normal
outdoor indicator indicate
the above failure
check if the any current among
compressor input port U-V-W is
over high
check if the system is
blocked
yes
yes
no
check if module bottom temperature
is over high, more than 90degree
if ventilation beside the
module radiator is good
yes
compressor startup procedure is
abnormal, and vibrates seriously
2) Outdoor power module failure
The following troubleshooting is available for:
a. IPM failure(00001)
b. Compressor U-phase,V-phase and W-phase over-current(00101), total unit over-current(00101)
c. Compressor start-up abnormal(10001), Compressor jam(01111), Compressor phase loss(11110), Module
lack-voltage protection(11011), Detect PFC over-current(01100), PFC voltage abnormal(11111)
yes
yes
if the total load
is too big
no
adjust the power supply
as 220-230VAC, 50Hz
if the total unit
operate normally
replace the
module
no
Troubleshooting
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