halts during the defrosting stage, remain still for 30 seconds, then
conducts defrosting operation if it is still within the defrosting stage, the
compressor starts according to the demand of the startup of the
defrosting compressor.
l Entering into the defrosting stage, it must be guaranteed that the
minimum operation time of the compressor should amount at least to 2
minutes before exit defrosting.
D. Conditions to exit the defrosting stage
The defrosting operation will return to heating operation if any of the following
conditions is met.
（
1
）：
The temperature of the outdoor heat exchanger remains above
7
℃
(Can be adjusted through EEPROM) for over 80 seconds
continuously.
（
2
）：
Keep defrosting operation for 9 minutes (Can be adjusted
through EEPROM) continuously.
E
．
After the condition to exit defrosting operation is met, work as
follows.
The compressor stops, the outdoor fan motor stops 50
seconds later, the four-way valve turns on, the compressor starts
according to the starting process.
Time sequence of the defrosting operation is as follows:
Compressor
Outdoors fan motor
Four-way valve
60
×
9Max
5.Outdoor condensation temperature control while cooling:
5.1.When the operation frequency F
＜
40HZ, if the temperature of the
outdoor coiled pipe T
outdoor coil≥
52
℃
, decrease the operation frequency
of the compressor by 2Hz
，
then examine the temperature of the outdoor
coiled pipe at 10-second intervals, if T
outdoor coil≥
52
℃
, decrease the
operation frequency further by 2Hz
，
until the frequency is the lowest;
During the frequency-decreasing operation, if 47
℃≤
T
outdoor coil ＜
52
℃
, the
compressor and the fan motor keep their original states;
the compressor runs at the normal operating frequency, and the outdoor fan
motor returns to its original state,
5.2.When the operation frequency F
≥
40HZ, if the temperature of the outdoor
coiled pipe T
outdoor coil≥
57
℃
, decrease the operation frequency of the compressor
by 2Hz
，
then examine the temperature of the outdoor coiled pipe at 10-second
intervals, if T
outdoor coil≥
57
℃
, decrease the operation frequency further by 2Hz
，
until the frequency is the lowest;
During the frequency-decreasing operation, if 52
℃≤
T
outdoor coil＜
57
℃
, the
compressor and the fan motor keep their original states;
When T
outdoor coil≤
51
℃
, the compressor runs at the normal operating frequency,
36
Model:
HSU-12HS03/R2(DB)
HSU-09HS03/R2(DB)Domestic Air Conditioner
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