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12.10 Overload Protection Control
Outdoor Fan Control
If the temperature of the Outdoor Heat Exchanger less than -3°C, Outdoor Fan is ON. The Outdoor Fan stop,
o
when Outdoor Heat Exchanger temperature is Tb or more according to Outdoor Air Temperature region as
table below:
The Outdoor Fan restarts when the indoor heat exchanger temperature falls to 49°C.
Outdoor Air
Temperature
Tb
During starting of Heating mode and after deice, Outdoor Fan ON for 90 sec. (Hi).
Compressor High Pressure Control
If the indoor heat exchanger becomes 68°C or more, the compressor will stop and restart automatically.
o
Time Delay Safety Control is activated before the compressor restart.
o
12.11 4-Way Valve Control
4-way valve always on during Heating operation. (except deicing operation)
When the unit is switched off by remote control during Heating operation, the 4-way valve stay at Heating
position for 5 minutes.
This is to prevent the refrigerant flow process sound for being occur.
12.12 Hot Start Control
Hot Start Control is to prevent cool air discharge into the room when heating operation start.
When Heating operation starts, Indoor fan will not start until the indoor heat exchanger reaches 30°C as diagram
shown.
Hot start is completed when indoor heat exchanger rises to 42°C or operation over 4 minutes.
< 10°C
≥ 10°C ~ < 15°C ≥ 5°C ~ < 20°C ≥ 20°C ~ < 25°C
≥ 5°C
≥ 3°C
≥ 1.5°C
≥ 0.5°C
35
≥ 25°C
Outdoor Fan
OFF
≥ 0.5°C
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