Function of Thermistor SiUS12-928_B
53 Function and Control
(5) Liquid Pipe
Thermistor
1. When only one indoor unit is in heating, the liquid pipe thermistor is used for subcooling control.
The actual subcool is calculated with the liquid pipe temperature and the maximum indoor heat
exchanger temperature. The system controls the outdoor electronic expansion valve openings
to obtain the target subcool.
2. In heating operation, the liquid pipe thermistor is used for liquid pipes isothermal control. The
system controls the outdoor electronic expansion valve opening so that the liquid pipe
temperatures in each room becomes equal.
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