AUX air conditioner service manual
83
●Auxiliary electric-heater function (automatic run)
a) When running under heating mode, the auxiliary electric heating starts if the electric heating is
permitted by and meets the following conditions:
A、The compressor runs in the mode of heat pump for 4 minutes.
B、TA≤TA2
C、TS－TA≥3℃
D、TE＜TE6
b)When the auxiliary electric heating meets one of the below conditions, the auxiliary electric heating
shut off：
A、TA≥TA4；
B、TS－TA≤2℃
C、TE≥TE7
c) The electric heating quit once any one of the compressor and the indoor fan unit doesn’t work.
d) Under the auxiliary electric heating process, if the air-conditioner turns off without non-electricity,
the indoor fan transforms automatically to run at the low fan speed for 60 seconds.
e) When the compressor runs, if the auxiliary electric heating quit, the compressor can restart after 1
minute’s electric heating.
●Intelligent defrosting function
a) The start condition for defrosting
A、When the indoor fan unit starts the overloading protection and the outdoor fan unit stops, when the
outdoor fan unit restarts and the time of continue running ≥10minutes，and the accumulated running
time of the compressor≥45 minutes，the continuous running time≥20minutes, TE≤TE6（and shall
continue 3minutes）.
B、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 temperature,
when the difference value between TE and TA is reduced by up than X℃ 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 TE≤TE6(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℃).
Assume △T=Tp-Tr，￡ =△Tmax-△T，§=5,￡≥§and continuously lasts above than 3 minutes to start
the defrosting process. If the fan speed keep same, then§=5 ；if the fan speed reduces one gear,
then§=5-2=3。
△T is the difference value between the coil pipe and the indoor temperature.￡ is the maximum
difference value between coil pipe and indoor temperature-instant △T，§is the reduction scope of the
temperature difference between coil and indoor temperature.
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