Daikin REYQ8-48PY1B, Service Manual

Page: 154 / 477

Outline of Control (Indoor Unit) SiBE37-701_B
143 Function
6.2 Thermostat Control
6.2.1 Room Temperature Thermistor in Remote Controller
Temperature is controlled by both the room temperature thermistor in remote controller and
suction air thermistor in the indoor unit. (This is however limited to when the field setting for the
room temperature thermistor in remote controller is set to “Use”.)
Cooling If there is a significant difference in the set temperature and the suction air temperature, fine
adjustment control is carried out using a suction air thermistor in indoor unit, or using the room
temperature thermistor in the remote controller near the position of the user when the suction air
thermistor in indoor unit is near the set temperature.
„
Ex: When cooling
Assuming the set temperature in the figure above is 24°C, and the suction air
temperature has changed from 18°C to 30°C (A
→
F):
(This example also assumes there are several other air conditioners, the VRV system is off, and
that temperature changes even when the thermostat sensor is off.)
Suction air thermistor in indoor unit is used for temperatures from 18°C to 23°C (A
→
C).
Room temperature thermistor in remote controller is used for temperatures from 23°C to 27°C
(C
→
E).
Suction air thermistor in indoor unit is used for temperatures from 27°C to 30°C (E
→
F).
And, assuming suction temperature has changed from 30 ° C to 18 ° C (F
→
A):
Suction air thermistor in indoor unit is used for temperatures from 30°C to 25°C (F
→
D).
Room temperature thermistor in remote controller is used for temperatures from 25°C to 21°C
(D
→
B).
Suction air thermistor in indoor unit is used for temperatures from 21°C to 18°C (B
→
A).
Set temperature (Ts)
Range in which room temperature
thermistor in remote controller can
be used
Range in which suction
air thermistor in indoor
unit can be used
Differential
Suction air temperature (TH1)
TH1 = Ts – 3
TH1 = Ts – 1
TH1 = Ts + 1
TH1 = Ts + 3
°C
32
30
28
26
24
22
20
18
16
12 14 16 18 20 22 24 26 28 30 32 34
°C
A B C D E F