Program Dry Operation - Daikin 2MXS-N Series Service Manual

Function of CTXS, FTXS, CDXS, FDXS, FVXS Series
1.5

Program Dry Operation

Outline Program dry operation removes humidity while preventing the room temperature from lowering.
Since the microcomputer controls both the temperature and airflow rate, the temperature
adjustment and FAN setting buttons are inoperable.
Detail The microcomputer automatically sets the temperature and airflow rate. The difference between
the room thermistor temperature at start-up and the target temperature is divided into two zones.
Then, the unit operates in an appropriate capacity for each zone to maintain the temperature and
humidity at a comfortable level.
temperature at start-up
40
Zone B
Y
Room thermistor Target temperature
24°C or more
(75.2°F or more)
temperature at start-up
18 ~ 23.5°C
(64.4 ~ 74.3°F)
17.5°C or less
(63.5°F or less)
Thermostat turns on also when the room temperature is in the zone B for 10 minutes.
Zone C = Thermostat ON
Zone A = Thermostat OFF
Thermostat OFF point
X
Room thermistor
18°C
(64.4°F)
X
Z
Zone B
+ 0.5˚C (0.9˚F)
(R11587)
Thermostat ON point
Y
X – 2.5°C X – 0.5°C
(X – 4.5°F) (X – 0.9°F)
X – 2.0°C X – 0.5°C
(X – 3.6°F) (X – 0.9°F)
X – 2.0°C X – 0.5°C = 17.5°C
(X – 3.6°F) (X – 0.9°F = 63.5°F)
Function and Control
SiUS121502E
Z