Program Dry Operation - Daikin FTXR-T Series Service Manual

SiUS041829E
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.
Details
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.
 Thermostat turns on also when the room temperature is in the zone B for 10 minutes.
Part 4 Functions and Control
Room temperature
X – 1.0°C (1.8°F)
Y = X – 2.5°C (4.5°F)
or
Y = X – 2.0°C (3.6°F)
Room thermistor
temperature at start-up
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)
Zone C = Thermostat ON
Zone B
Zone A = Thermostat OFF
Target temperature Thermostat OFF point
X
Room thermistor
18°C
(64.4°F)
Room temperature
Target temperature X
Z = X – 0.5°C (0.9°F)
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)
Main Functions
(R24029)
Z 
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