At very low ambient temperatures, the compressor may operate with a higher compression ratio, which affects the discharge temperature.
What is the discharge temperature
It is the temperature of the refrigerant immediately after the compressor.
Why does it increase
A larger pressure difference and high required water temperature increase the thermal load of the compressor.
Why is it monitored
Excessively high temperature can affect the oil, insulation, and long-term reliability.
Control
The controller can limit compressor frequency or supply temperature for protection.
