Freeze Prevention - Daikin VRVIII-S Service Manual

Outline of Control (Indoor Unit)
6.4

Freeze Prevention

Freeze
When the temperature detected by liquid pipe temperature thermistor (R2T) of the indoor unit
heat exchanger drops too low, the unit enters freeze prevention operation in accordance with
Prevention by Off
the following conditions, and is also set in accordance with the conditions given below.
Cycle (Indoor
Unit)
Conditions for starting freeze prevention: 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 stopping freeze prevention: Temperature is +7°C or more for 10 min.
continuously
Ex: Case where temperature is –5°C or less for total of 10 min.
62
+ 7°C
+ 0°C
- 5°C
10 min.
Freeze prevention operation
Forced OFF by thermostat
SiENBE34-703
10 min.
(VG005)
Function