Haier AU282AHBEA Service Manual page 219

Ta≥50℃, Max. frequency 68Hz
(1) Frequency limited conditions of current protection
current<1.598V, no limited
1.744V≤current<1.917V, frequency not change
2.080V≤current<2.332, frequency reduces continuously
current>2.332V, unit shutoff
Note: The current limitation for different models, you can choose it due to the different distributing voltage
of the hardware current detecting circuit.
(2) Compressor overheat protection
Tc(compressor temperature)< 97℃, no limited
103℃≤Tc<108℃, frequency not change
Tc≥120℃, unit shutoff
97℃, all resume.
(3) Anti-freezed protection
Te(evaporator temperature)>8℃, no limited
2℃≤Te<5℃, frequency not change
Te<-1℃, 5 minutes later, the unit shutoff (commercial unit is 8 minutes)
Te>8℃, all resume.
(4) In cooling mode, outdoor heat exchanger overload protection
Te<53℃, not limited
59℃≤Te<62℃, frequency not change
Te≥72℃, unit shutoff
Te<53℃, all resume
When the unit stops, the fan motor of outdoor unit will stop.
(5) High Mode operation
In cooling state of High mode, the temperature will be added 4℃ at the base of the set temperature, the
compressor will run at the frequency with the added temperature. 15 minutes later, the High mode will be
cancelled automatically.
In High mode, the indoor fan is High speed. The evaporator anti-freezed function, ourdoor heat
exchanger overload protection, compressor overheat protection and over current protection are valid
(identical to that of cooling mode).
(6) Soft Mode operation
In cooling state of Soft mode, the frequency will depend on the current at the frequency set in the chip,
when the current is below half of the rated current at rated condition. The fan speed is Auto Fan until you
change the operation mode. The Auto Fan of Soft mode depends on the temperature difference.
Ta-Ts≥5℃ High speed
1℃≤Ta-Ts<5℃ Med speed
1℃≤Ta-Ts<1℃ Low speed
Note: Ta: indoor ambient temperature; Ts: set temperature
8.2.4 Dehumidification operation
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