Remote Controller Thermistor - Daikin RXYQ-TA Series Service Manual

Outline of Control (Indoor Unit)
8.3

Remote Controller Thermistor

Temperature is controlled by both the remote controller thermistor and suction air thermistor for the
indoor unit. (This is however limited to when the field setting for the remote controller thermistor is
set to Use.)
Note: When outdoor air is introduced to the air-conditioner with mixed into indoor air, the room
temperature may fail to be set temperature, since TS and TH1 do not enter the area of "use range
of remote control thermistor." In such a case, put the remote sensor (optional accessory) in your
room, and use it with setting "do not use remote control thermostat."
∗ FXTQ-TA models do not have this control because they do not have suction air thermistor. The
Cooling
If there is a significant difference in the set temperature and the suction temperature, fine
adjustment control is carried out using a suction air thermistor, or using the remote controller
thermistor near the position of the user when the suction temperature is near the set temperature.
˚C
32
Set temperature
(Ts)
30
28
26
24
22
20
18
16
12
(This example also assumes there are several other air conditioners, and the suction temperature
changes even when the thermostat is off.)
Suction air thermistor is used for temperatures from 18°C (64°F) to 23°C (73°F) (A → C).
Remote controller thermistor is used for temperatures from 23°C (73°F) to 27°C (81°F) (C → E).
Suction air thermistor is used for temperatures from 27°C (81°F) to 30°C (86°F) (E → F).
Suction air thermistor is used for temperatures from 30°C (86°F) to 25°C (77°F) (F → D).
Remote controller thermistor is used for temperatures from 25°C (77°F) to 21°C (70°F) (D → B).
Suction air thermistor is used for temperatures from 21°C (70°F) to 18°C (64°F) (B → A).
75
thermistor is selectable manually when remote sensor (optional accessory) is installed.
A
14 16 18
Range in which remote controller
thermistor can be used
Assuming the set temperature in the figure above is 24°C (75°F), and the suction
temperature has changed from 18°C (64°F) to 30°C (86°F) (A → F):
Assuming suction temperature has changed from 30°C (86°F) to 18°C (64°F) (F → A):
TH1 = Ts – 1
TH1 = Ts – 3
B C D
20 22 24 26
Range in which
suction air thermistor
can be used
TH1 = Ts + 3
E F
28 30 32
Suction temperature (TH1)
Differential
Functions and Control
SiUS341615E
TH1 = Ts + 1
˚C
34