Daikin FTX-N Series, Service Manual

Page: 58 / 242

Functions for FTX, FVXS Series SiUS091601EA
53 Part 4 Functions and Control
Reference
2.6 Thermostat Control
Outline
Thermostat control is based on the difference between the room thermistor temperature and the
target temperature.
Details
Thermostat OFF Condition
 The temperature difference is in the zone A.
Thermostat ON Conditions
 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 temperature difference remains in zone B for the determined monitoring time.
Cooling/Dry
Heating
FTX Series
FVXS Series
Refer to Temperature Control on page 44 for details.
Cooling Dry Heating
FTX09/12/15NMVJU 10 minutes 7.5 minutes 10 seconds
FTX18/24UVJU 10 minutes 10 minutes 10 seconds
FVXS series 10 minutes 10 minutes 10 seconds
Zone B Zone B
Zone A Zone A
OFF OFF
ON ON
Zone C Zone C
Room thermistor temperature – target temperature
–1.5°C (–2.7°F)
(R22426)
Cooling : –0.5°C (–0.9°F)
Dry : –0.5°C (–0.9°F)
Cooling : –2.0°C (–3.6°F)
Dry : –2.5 ~ –2.0°C (–4.5 ~ –3.6°F)
Zone B Zone B
Zone A Zone A
OFF OFF
ON ON
Zone C Zone C
2.0°C (3.6°F)
0.5°C (0.9°F)
1.5°C (2.7°F)
Room thermistor temperature – target temperature
(R22427)
Zone B Zone B
Zone A Zone A
OFF OFF
ON ON
Zone C Zone C
1.5°C (2.7°F)
Room thermistor temperature – target temperature
0°C (0°F)
(R22428)
1.0°C (1.8°F)