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13.24 Overload Protection Control
• Outdoor Fan Control
o If the temperature of the Outdoor Heat Exchanger less than -3°C, Outdoor Fan is ON. The Outdoor Fan stop,
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
< 10°C ≥ 10°C ~ < 15°C ≥ 5°C ~ < 20°C ≥ 20°C ~ < 25°C ≥ 25°C
Tb ≥ 5°C ≥ 3°C ≥ 1.5°C ≥ 0.5°C ≥ 0.5°C
Outdoor Fan
OFF
During starting of Heating mode and after deice, Outdoor Fan ON for 90 sec. (Hi).
• Compressor High Pressure Control
o 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.
13.25 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.
13.26 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.
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