Function Details - Daikin Super Multi Plus D-Series Service Manual

SiEBE18-526
8.3

Function Details

Thermostat
Control
Freeze-up
The thermostat turns OFF under the following temperature conditions to prevent freezing of the
Protection indoor unit heat exchanger.
Control
Function
Heating
thermostat OFF
Heating
thermostat ON
The motorized valve is controlled to maintain the indoor unit heat exchanger temperature
(Te) above 0°C.
The outdoor unit fan speed is reduced to prevent freeze-up protection control from activating
during cooling operation under low outside air temperature. (For details, see the section on
cooling operation under low outside air temperature.)
Outdoor unit heat exchanger temperature
(Te)
7°C
-1°C
-3°C
-5°C
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
25
Initial setting
25
25
25
25
Set temperature
-2.5 -2 -1 0 +1 +2
Freeze prevention control
Reset after 10 continuous minutes
Thermostat OFF after
40 cumulative minutes
Thermostat OFF after 1 continuous minutes
from 8 min. after starting (FHQ only)
Thermostat OFF after
1 continuous minutes from 8 min. after starting (FFQ only)
Indoor Unit (SkyAir Models)
+2.5
Cooling
thermostat ON
Cooling
thermostat OFF
(S1962)
(S1116)
95