Haier AB182ACERA Service Manual page 39

The compressor total running time is over 30 minutes, Tp<-6℃, enter defrosting (signal time over 5
minutes);
b. Quit condition
The defrosting time is over 10 minutes (excluding conversion time for before and after defrosting).
Or Tp>12℃, quit defrosting.
After defrosting begins, the loads will operate as below:
a. In defrosting:
For the unit with outdoor PCB: the operation of the compressor and the 4-way valve is controlled by
indoor unit, the outdoor motor operation is controlled by outdoor unit.
For the uit without outdoor PCB: the compressor and the outdoor motor stop, meanwhile, indoor
motor will stop too. 55 seconds later, 4-way valve will close. Another 5 seconds later, the
compressor starts up.
b. Quit defrosting:
The compressor will not stop, outdoor motor starts up and after it runs for 30 seconds, 4-way valve
will open, indoor motor will run as anti-cold air state.
For the unit with auxiliary electric heating function:
a. If the auxiliary electric heating function is working when the defrosting condition is met, please
stop electric heater firstly, 20 seconds later, defrosting can begin;
b. After defrosting, the unit will adjust the working state of electric heater according to the setting
before defrosting.
8. Auxiliary electric heating function (valid in heating mode or heating state in AUTO mode)
Enter condition:
1) ΔT>1
2) Thermostat ON and running for 1 minute
3) Tr<26℃
4) Indoor motor running
5) Electric heating function start signal available (cancelled)
6) The system working in heating mode or in heating state of AUTO mode
7) Tg<48℃
If the above conditions can all be met, the electric heating function will work.
Quit condition:
1) ΔT≤1
2) Thermostat OFF
3) Tr>26℃
4) Indoor motor stops
5) Electric heating function start signal not available (cancelled)
6) The system in non-heating operation
7) Tg>52℃
If one of the above conditions can be met, the electric heater will stop.
9. Special functions
9.1 CLOCK setting and TIMER function
The unit can set 24-hour TIMER ON/OFF, and the min. unit is 1 minute, after being set, the timer
lamp of indoor will be on, and after the timer is over, the timer lamp will be off.
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Commercial Air Conditioner
Model: AB182ACERA
AC182ACERA