Haier AC242ACEAA [301/408] Electric control functions

Haier AU282AHERA [301/408] Electric control functions
SLEEP button 6 times continuously, then the buzzer will sound 3 times, you can enter the manual
defrosting. At this moment, the unit will not adjust the enter condition of defrost and begin to defrost
function directly, whose procedure is as the same as the auto defrost; the quit condition is that the
defrosting time is up to 5 minutes.
Auto defrost:
Project 1: with outdoor PCB
a. Enter condition
In heating mode, the compressor has run for 45 minutes continuously.
The compressor has run for 60 minutes in all and has run for over 5 minutes continuously.
If one of the above conditions can be met, and indoor unit receives the defrosting temp. arrival
signal from outdoor, the unit begins to defrost and sends the defrosting beginning signal to outdoor.
b. Quit condition
The defrosting temp. arrival signal from outdoor is cancelled or the defrosting time is over 12
minutes (including each 1-minute conversion time for before and after defrosting), the defrosting is
over and sends the defrosting cancelled signal to outdoor unit.
Project 2: For the unit without outdoor PCB and defrosting sensor
a. Enter condition
ƽ Indoor occurs overload protection and outdoor motor stops, if outdoor motor can not enter
overheat state in 10 minutes after it runs again, also the compressor runs for 45 minutes in all
and has run for over 20 minutes continuously, Tg is below 43ć;
ƽ The compressor runs for 20 minutes continuously, Tg will reduce 1ć for every 6 minutes, and
Tg is below 40ć, 5 minutes later after the compressor restarts up.
ƽ The compressor runs for 3 hours in all and has run for over 20 minutes continuously, Tg is
below 40ć;
ƽ The temperature difference between Tg and Tr is below 16ć and the compressor runs for 45
minutes in all and has run for over 20 minutes continuously, Tg is below 40ć
If one of the above conditions can be met, the unit will enter the defrost.
b. Quit condition
The defrosting time is over 10 minutes (excluding conversion time for before and after defrosting).
Project 3: For the unit without outdoor PCB but with defrosting sensor
a. Enter condition
In heating mode, after the compressor starts up, the compressor and the outdoor motor have run for
at least 5 minutes;
The compressor total running time is over 30 minutes, Tp<-18ć, enter defrosting (signal time over
5 minutes);
The compressor total running time is over 30 minutes, Tp<-6ć, 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>12ć, 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
Electric control functions
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