Haier AU122AEERA Service Manual page 41

Commercial Air Conditioner
Trouble description
IPM failure
Abnormal of DC moter
Communication error between
indoor and outdoor unit
Compressor discharging
temprerture protection
Spdu / IPM module over
current protection
Abnormal of outdoor ambient
sensor
Abnormal of piping sensor
High pressure protection
Abnormal of compressor
discharge sensor
The power supply is not the
50Hz
Module PWM select circuit error
Detect PFC over-current
Module error
Eeprom failure
Compressor jam(only for spdu)
Compressor start-up abnormal
Compressor parameter error
Circuit error detected by current
Abnormal of Compressor
suction sensor
Communication error
SPDU
Communication error between
main board and spdu module
Low pressure protection
Condenser air inlet temp. sensor
failure
Module over-voltage protection
(only for ISPM)
Module lack-voltage protection
(only for ISPM)
Compressor phase loss
PFC voltage abnormal
Compressor U-phase
over-current
Compressor V-phase
over-current
Compressor W-phase
over-current
4-way valve reverse failure
Lack off refrigerant or discharge
side dirty
Display of
LED borad Analyze and diagnose
LED 5-4-3-2-1
00001 IPM failure
00010 Jam of DC motor or motor failure
00011 Communication fail over 4min
Compressor discharging tempreature over 120
00100
centigrade
00101 Current of spdu / ISPM module over limit
Outdoor
00110
open-circuit last 60 sec
Piping sensor short-circuit or open-circuit last
00111
60 sec
01000 System high pressure over 4.5Mpa
Compressor discharge sensor short-circuit or
01001
open-circuit last 60 sec
01010 The power supply is not the 50Hz
01011 Module PWM select wrong circuit
The current of PFC circuit is too high
01100
01101 Module error
01110 Outdoor main board eeprom fail
01111 Inner compressor is
10001 Compressor start-up abnormal
Wrong compressor parameter is selected in the
10010
Eeprom
10011 Circuit damage detected by the current
Compressor suction sensor short-circuit or
10101
open-circuit last 60 sec
10110 Communication error send from
10110 Communication fail over 4min
11000 System low pressure
Condenser air inlet temp. sensor short-circuit or
11001
open-circuit last 60 sec
11010 Send from ISPM module
11011 Send from ISPM module
11110 U/V/W loss
11111 Voltage of PFC circuit is abnormal
00101 The current of compressor U-phase is too high
00101 The current of compressor V-phase is too high
00101 The current of compressor W-phase is too high
Alarm and stop if detect Td-Tci<=25 last for 1min
after compressor has started for 10min in heating
11100
mode, confirm the failure if it appears 3 times
in one hour.
Alarm and stop if detect Td-Tci>=25 last for 1min
after compressor has started for 10min in cooling
11101
mode, confirm the failure if it appears 3 times
in one hour
41
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
ambient sensor short-circuit or
abnormal jamed
SPDU
under 0.05Mpa
Flash times
of LED on
mainborad
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