Haier AU122AEERA - Electrical Control Functions; Indoor Temperature Protection; Over Current Protection

Commercial Air Conditioner
Model: AU122AEERA AB122ACERA
AC122ACERA AD122ALERA
ambient temperature, and 3 minutes later, the unit will adjust according to the outdoor ambient
temperature and compressor running frequency.
Fan speed chart in 3 minutes after compressor starts up:
Ambient temp. ~10 10~25 25~
Cool Class-3 Class-5 Class-6
heat Class-6 Class-5 Class-3
Fan speed chart in 3 minutes after compressor runs due to the ambient temp. and compressor
frequency:
Compressor frequency in cooling F<40Hz
40Hz≤F<50Hz 50≤F
Over 28℃
Class-3 Class-5 Class-6
Twh
Below 28℃
Class-1 Class-3 Class-5
Compressor frequency in heating F<40Hz
40Hz≤F<50Hz 50≤F
Over 15℃
Class-1 Class-3 Class-4
Twh
Below 15℃
Class-3 Class-5 Class-6
● Low temp. cooling mode:
Outdoor temp. To To <0
0≤To <5 5≤To <10 10≤To <15
DC fan speed Class-1 Class-2 Class-3 Class-4
● Rated running mode:
Outdoor fan motor runs in class-7(DC motor) in rated mode.
1.2.4 Fan motor speed control when outdoor select inverter moter
Select fan motor by SW4 on the outdoor small indicate board, ON means DC motor, OFF means
inverter motor.
Blowing remain heat function: In cooling mode, when compressor shuts off, outdoor motor will run in
low speed, and will shut off after 30 seconds.
Fan speed chart in 3 minutes after compressor starts up:
Ambient temp. ~15 15~25 25~
Cool Low speed High speed High speed
Ambient temp. ~10 10~20 20~
heat High speed High speed Low speed
Fan speed chart in 3 minutes after compressor runs due to the ambient temp. and compressor
frequency:
Compressor frequency in cooling ~25 25~45 45~
Over 28℃
Low speed High speed High speed
Twh
Below 28℃
Low speed Low speed High speed
Compressor frequency in heating ~25 25~45 45~
Over 15℃
Low speed Low speed High speed
Twh
Below 15℃
Low speed High speed High speed
Remark: 1. There are 45 seconds delay when changing fan speed;
2. When in non-heating mode, if outdoor ambient temp. is lower than 15℃, the fan will run in low
speed;
3. When in heating mode, if outdoor ambient temp. is lower than 20℃, the fan will run in low
speed.
1.3 Outdoor electronic expansion valve (EEV) control
1.3.1 Movement of EEV
Full-close, full-open, open angle upper limitation, open angle lower limitation, open/close valve speed.
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