Te≤C×TA－α
Herein: C：TA＜0℃，C=0.8 TA≥0℃，C=0.6
According to SW2, the setting is as follow: in the place easy to frost, it is H; when out of factory, it is M.
Jumper
selection
M(out of factory) H
α(℃)
8(E) 6(E)
②Defrosting entering condition: -15℃≤C×TA－α≤-2℃
③Stop and Pause condition of compressor running accumulative time in heating mode:
Checking Stop: running operation changes from heating to cooling.
Checking Pause: thermostat OFF, or the unit stops.
3.7.2 Cancel condition:
It will take the max. 10 minutes from beginning defrosting to quit it. Te sensor will measure the condition of
outdoor heat exchanger, if the temp. is over 7℃ for 60 seconds in all or is up to 12℃ for 30 seconds in all,
the defrosting will be over.
3.7.3 Compulsory defrosting control
Enter condition: in heating mode, after receiving the compulsory defrosting signal from indoor unit, the unit
will perform the compulsory defrosting operation.
Cancel condition: Te≥12℃ and keep for 1 minute or the defrosting time is over 10 minutes.
The manual defrosting signal of indoor unit will remain until the outdoor enters defrosting mode.
Note: When outdoor compressor not running, the unti still can enter manual defrosting, but it will comply
with the 3-minute protection of compressor.
-50-
Commercial Air Conditioner Model: AU18/222XFERA
AS072/092/122XVERA
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