Table of Contents
Outline of Control
3.2.4
Freeze Prevention
Freeze Prevention
When the temperature detected by liquid pipe temperature thermistor (R2T) of the indoor unit heat
by Off Cycle
exchanger drops too low, the unit enters freeze prevention operation in accordance with the following
(Indoor Unit)
conditions, and is also set in accordance with the conditions given below.
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.
450
Function UM Combination "MA1R Series" Using R-407C
PACD011001C2
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Troubleshooting
