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Shinco Service Manual
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4. Running mode
4.1. Defrosting
1. Entry condition:
Defrosting starts when meeting one of the following conditions
a. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more than
40 minutes, and the
temperature remains consecutively
-6°c for more than 3 minutes
b. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more than
80 minutes, and the
temperature remains consecutively
-4°c for more than 3 minutes
c. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more than
120 minutes, and the
temperature remains consecutively
-3°c for more than 3 minutes
2. .Ending condition of defrosting
If one of following conditions is satisfied, end the defrosting and turn into heating mode:
a. The defrost time has reached to 10 minutes.
b. When the temperature of outdoor heat exchanger rises up to
15°C.
3.Defrosting Actions:
4.2. Fan-only mode
The outdoor unit doesn’t operation, only the indoor fan runs. The fan speed can be set on HIGH MID LOW, and the
louver can be regulated by remote controller.
4.3. Cooling mode
4.3.1 Compressor frequency controlling
a. Frequency control when starting
Temperature difference= Room temperature (RT)-Set temperature (ST)
RT-ST
b. Frequency control during operation
The frequency will change according to the RT-ST, and details see following fig.
Max. 10 minutes
20s 20 s
ON 10s 10S
Compressor. OFF
ON ON
4 way valve OFF
ON ON
Outdoor fan OFF
ON