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Algorithm & Control
2.0 Function & Control
2.1 Temperature Control
The temperature is detected by the room temperature thermistor (either on the unit or on the wired panel).
The set temperature can be selected either through remote controller or wired controller by user.
Room temperature
2.2 Cooling and Heating Mode Operation
The system has 5 operating modes. The mode selection is done through the indoor by using the remote
controller.
The operating modes are:
• Cool
• Heat
• Fan
• Auto
• Dry
2.2.1 Cooling Mode
When Tr ≥ Ts + 1.5°C (2.7°F)
• Compressor, Indoor Fan and Outdoor Fan ON.
When Tr ≤ Ts - 2°C (3.6°F)
• Compressor and Outdoor Fan OFF. Indoor Fan remained ON.
Tr = Room Temperature
Ts = Set Temperature
When cooling load is too small and the room temperature still drops below compressor cut off point,
compressor will stop.
Compressor Capacity
Lowest Frequency
17
Room thermistor temperature
Target temperature
Set temperature
T
Ts - 2°C (3.6°F)
Compressor will stop
Time
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