90
14.22 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.
14.23 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.
14.24 Hot Start Control
• This operation is to prevent the Cold Draft during Heating mode operation.
• The operation will start when compressor OFF (Thermo OFF) during Heating operation.
• For the first 2 mins. from compressor OFF (Thermo OFF), Indoor fan speed will operate accordingly to the Indoor
heat exchanger temperature as shown below:
• After 2 mins. from compressor OFF (thermo OFF), Indoor fan will run at SSLo speed only.
• Anti Cold Draft Control will stop when:
o Intake temperature < set temperature. (Time Delay Safety Control 4 minutes waiting is valid)
o 30 Minutes Time Save Control activates.
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