MSP Duct Type Functions
SiSG121917E
67
Part 4 Functions and Control
2.3 Freeze Prevention Control
Outline
When the temperature detected by liquid pipe thermistor (R2T) of the indoor heat exchanger
drops too low, the unit enters freeze prevention control in accordance with the following
conditions, and is also set in accordance with the conditions given below.
Details
Conditions for starting: Temperature is –1°C or less for total of 40 min., or temperature is –5°C
or less for total of 10 min.
Conditions for cancelling: Temperature is +7°C or more for 10 min. continuously
Ex: Case where temperature is –5°C or less for total of 10 min.
Freeze pre
v
ention control
N
ormal operation
Forced OFF
b
y thermostat
10 min.
– 5°C
+ 0°C
+ 7°C
10 min.
(R12940)
