AUX air conditioner service manual
73
☆When heating turns off：
A、If TE≥TE5，the indoor fan unit runs at the low fan speed for 10 seconds.
B、If TE＜TE5，the indoor fan unit closes.
⑤Ventilating mode
a)When ventilating，only display the indoor temperature but without the setting temperature and its
display.
b)When ventilating，the temperature setting “plus” and “minus” are invalid, the functions of strong fan
and sleeping are invalid, too.
c)When ventilating，the indoor fan unit runs at the setting fan speed. The compressor and outdoor fan
unit close. Timing function is valid.
⑶Control function of operation
auxiliary electric heating function①
a) When running under heating mode, the auxiliary electric heating starts if the electric heating is
permitted by and meets the following conditions:
The compressor runs in the mode of heat pump for 4 minutes.
A.TA≤TA3
B.TS－TA≥3℃
C.TE＜TE6
b)When the auxiliary electric heating meets one of the below conditions, the auxiliary electric heating
quit：
A.TA≥TA4；
B.TS－TA≤1℃
C.TE≥TE7
c) The electric heating quit once any one of the compressor and the indoor fan unit doesn’t work.
When the compressor runs, if the auxiliary electric heating quit, the electric heater can restart after 1
minute’s delay.
②Intelligent defrosting function
a)The start condition for defrosting(The defrosting function is workable if meet one of the below
conditions）
A、When start the heating mode or 5 minutes later after the defrosting process, and after the
process for catching the maximum temperature difference between the indoor coil and indoor room
temperature (last for 3 minutes), when the difference value between the indoor coil temperature and
indoor room temperature is reduced by up than 5℃ and last for above than 3 minutes, and the
continuous running time of the compressor ＞5 minutes, the accumulated running time of the
compressor is over than 45 minutes, and the indoor coil temperature ≤48℃.(When the fan speed of the
indoor fan unit falls by one gear, the correctness of the temperature difference is -2℃, when the fan
speed of the indoor fan unit rise 1 gear, the correctness of the temperature difference is +2℃).
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