Indoor Unit (SkyAir Models) SiAU18-715
116 Function
8.3 Function Details
Thermostat
Control
Freeze-up
Protection
Control
The thermostat turns OFF under the following temperature conditions to prevent freezing of the
indoor unit heat exchanger.
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.)
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