Daikin VRV RXYQ72-384XAYCA Service Manual page 121

SiUS342004EB
9.4.2 With Infrared Floor Sensor
Whether the thermostat is turned on or off is determined by the difference between the remote
controller set temperature and the detected temperature around people.
Normal operation
 Cooling operation
 Heating operation
Dry operation
 When Tro ≤ 24.5°C (76.1°F)
 When Tro > 24.5°C (76.1°F)
FXFQ-AA, FXZQ-TB, FXUQ-PA only
If the field setting 11 (21)-12 is set to 02, Tro will be the same as the cooling set temperature.
ΔT = Room temperature or temperature around people – Remote controller set temperature
Tro: Room temperature or temperature around people at the start of dry operation
Tr: Room temperature or temperature around people
Control range of
When the floor temperature is very low, operation using the temperature around people may cause
temperature the suction air temperature to operate outside of use range.
around people To avoid the above condition, a limit based on the suction air temperature is set for the use range of
the temperature around people.
Cooling operation
 When the floor temperature is lower than suction air temperature (R1T), R1T will be treated as
 When the temperature around people is 15°C (59°F) or lower, R1T will be treated as the control
Heating operation
 When the floor temperature is higher than suction air temperature (R1T), R1T will be treated as
 When the temperature around people is 33°C (91.4°F) or higher, R1T will be treated as the
Part 4 Functions and Control
Normal operation
(Thermostat ON)
Normal operation
(Thermostat ON)
Dry operation
Dry operation
Dry operation
the control target temperature for operation.
temperature for operation.
the control target temperature in operation.
control temperature for operation.
ΔT ≤ –1.0˚C (–1.8˚F)
Thermostat OFF
ΔT ≥ +1.0˚C (+1.8˚F)
ΔT ≥ +1.0˚C (+1.8˚F)
Thermostat OFF
ΔT ≤ –1.0˚C (–1.8˚F)
Tr < Tro – 1.0˚C (– 1.8˚F)
Thermostat OFF
Tr > Tro + 1.0˚C (+ 1.8˚F)
Tr < Tro – 1.5˚C (– 2.7˚F)
Thermostat OFF
Tr > Tro + 0.5˚C (+ 0.9˚F)
Tr < Tro – 1.0˚C (–1.8˚F)
Thermostat OFF
Tr > Tro + 1.0˚C (+1.8˚F)
Outline of Control (Indoor Unit)
114