Function & Control; Temperature Control; Cooling And Heating Mode Operation - Daikin FTXB50BV1B Service Manual

Function & Control
2.0 Function & Control

2.1 Temperature Control

Temperature detected by room temperature thermistor (either on the unit or on wired panel). Set temperature
is select by user using wireless handset or wired handset.
Room thermistor temperature
Room temperature

2.2 Cooling and Heating Mode Operation

The system has 5 operating modes. The mode selection is done from indoor using 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 falling below compressor cut off point,
compressor will stop.
Compressor Capacity
Lowest Frequency
13
Target temperature
Set temperature
T Ts - 2°C
Compresor will stop
Time