Thermostat Control - Daikin 4MXS-R Series Service Manual

RA Indoor Unit Functions
CDXS, FDXS, FVXS series
Target temperature – 2.0˚C (–3.6˚F)
= Thermostat OFF
Target temperature – 3.0˚C (–5.4˚F)
Ex: When the target temperature is 25°C (77°F)
2.5

Thermostat Control

Outline
Thermostat control is based on the difference between the room thermistor temperature and the
target temperature.
Details
Thermostat OFF Condition
Thermostat ON Conditions
Cooling
Heating
CTXG, FTXR series
57
Cooling → 23°C (73.4°F): Thermostat OFF → 22°C (71.6°F): Switch to heating
Heating → 26.5°C (79.7°F): Thermostat OFF → 27.5°C (81.5°F): Switch to cooling
The temperature difference is in the zone A.
The temperature difference returns to the zone C after being in the zone A.
The system resumes from defrost control in any zones except A.
The operation turns on in any zones except A.
The monitoring time has passed while the temperature difference is in the zone B.
(Cooling: 10 minutes, Heating: 10 seconds)
Zone C Zone C
–1.0˚C (–1.8˚F)
Zone B Zone B
–2.0˚C (–3.6˚F)
Zone A Zone A
OFF
Zone A
Zone B
1.0˚C (1.8˚F)
Zone C
Cooling Operation
Target temperature + 2.5˚C (+4.5˚F)
Target temperature + 1.5˚C (+2.7˚F)
= Thermostat OFF
Heating Operation
Room thermistor temperature – target temperature
ON ON
–0.5˚C (–0.9˚F)
–1.5˚C (–2.7˚F)
OFF OFF
Room thermistor temperature – target temperature
1.5˚C (2.7˚F)
0.5˚C (0.9˚F)
0˚C (0˚F)
ON
SiUS121736EA
(R22000)
(R24031)
(R24032)
Functions and Control