Haier AC122ACERA [369/408] Troubleshooting

Haier AB282ACEAA [369/408] Troubleshooting
2.2.3 For AU362AHERA
Alarm condition: ambient temperature sensor is in short
circuit or open circuit for 60 seconds continously.
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
For sensor failure of ambient,
suction, coil and condenser air
inlet temperature, check if
resistor R74/R75/R77/R78 value
of outdoor PCB is 20K; for
discharging temperature sensor
failure, check if R76 is 47K
yes
yes
yes
no
no
no
1) Sensor failure
no
Replace PCB
yes
Replace sensor
Re-electrified after
being powered off
outdoor indicator
LED2 flashes 1 time
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
yes
yes
if the total load
is too big
LED1 is the indicator for communication between indoor
and outdoor unit
LED2 is the failure indicator
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
2) O utdoor power module failure
Troubleshooting
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