Daikin VRV RXYQ72-384XAYCA, Service Manual

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Outline of Control (Indoor Unit) SiUS342004EB
113 Part 4 Functions and Control
9.4 Thermostat Control
The thermostat ON/OFF differential value (factory setting) differs depending on the models.
9.4.1 Without Infrared Floor Sensor
Whether the thermostat is turned ON or OFF is determined by the difference between the remote
controller set temperature and the actual detected room temperature (  1).
Normal operation

Cooling operation

Heating operation
Dry operation

When Tro < 24.5°C (76.1°F)

When Tro ≥ 24.5°C (76.1°F)
FXSQ-TB, FXMQ-TB, FXMQ-TA, FXTQ-TA, FXTQ-TB, CXTQ-TA only
If the field setting 11 (21)-12 (for FXSQ-TB, FXMQ-TB, FXMQ-TA) or 14 (24)-5 (for FXTQ-TA,
FXTQ-TB, CXTQ-TA) is set to 02 , Tro will be the same as the cooling set temperature.
ΔT = Room temperature – Remote controller set temperature
Tro: Room temperature at the start of dry operation
Tr: Room temperature

1: The thermistor for room temperature detection depends on the field setting 10 (20)-2.
Differential value Model
1°C (1.8°F) FXFQ-T, FXZQ-TA, FXUQ-P, FXEQ-P, FXSQ-TA, FXHQ-M, FXTQ-TA, FXTQ-TB
0.5°C (0.9°F)
FXFQ-AA, FXZQ-TB, FXUQ-PA, FXDQ-M, FXSQ-TB, FXMQ-PB, FXMQ-TB,
FXMQ-TA, FXMQ-M, FXAQ-P, FXLQ-M, FXNQ-M, FXMQ-MF, CXTQ-TA
Thermostat OFF
N ormal operation
(Thermostat O N )
Δ
T
≤
–1.0˚C (–1. 8 ˚F)
Δ
T
≥ +
1.0˚C (
+
1. 8 ˚F)
Thermostat OFF
N ormal operation
(Thermostat O N )
Δ
T
≥ +
1.0˚C (
+
1. 8 ˚F)
Δ
T
≤
–1.0˚C (–1. 8 ˚F)
Thermostat OFF
Dry operation
Tr
<
Tro – 1.0˚C (–1. 8 ˚F)
Tr
>
Tro + 1.0˚C (
+
1. 8 ˚F)
Thermostat OFF
Dry operation
Tr
<
Tro – 1.5˚C (–2.7˚F)
Tr
>
Tro + 0.5˚C (+0.9˚F)
Thermostat OFF
Dry operation
Tr < Tro – 1.0°C (–1.8°F)
Tr > Tro + 1.0°C (+1.8°F)