Daikin FTXN50L - Unit Functionality and Control; 2.1 Temperature Control; 2.2 Cooling and Heating Mode Operation

Algorithm & Control
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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.
Target temperature
Room thermistor temperature
Room temperature
Set 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 handset.
The operating modes are:
• Cool
• Heat
• Fan
• Auto
• Dry
2.2.1 Cooling Mode
WhenTr≥Ts+1.5°C
• Compressor, Indoor Fan and Outdoor Fan ON.
WhenTr≤Ts-2°C
• 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
Time
T
Ts - 2°C
Compresor will stop