Table 3-5.6: Electric ball valve turn ON or OFF depending on the operation mode of the port.
Normal Simultaneous
Cooling / Heating
Error or Stop (OFF previously)
Error or Stop (Cooling previously)
Error or stop (Heating previously)
mode conflict(Set the controller to display E0,
default)
mode conflict(Set the controller not to display
E0)
5.2 Compressor Control
Cooling operation
Compressor frequency is PI controlled to keep low pressure at target temperature.
Te: Low pressure equivalent saturation temperature (°C)
Tes: Target Te value.
Tes will be decided by Te setting, if you choose Auto that means except Te setting, the Tes would be adjusted according to
the ambient temperature, refrigerant pipe length, etc.
Table 3-5.7: Te setting
Heating operation
Compressor frequency is PI controlled to keep high pressure at target temperature.
Tc: High pressure equivalent saturation temperature (°C)
Tcs: Target Tc value.
Tcs will be decided by Tc setting, if you choose Auto that means except Tc setting, the Tcs would be adjusted according to
the ambient temperature, refrigerant pipe length, etc.
Table 3-5.8: Tc setting
Simultaneous cooling and heating operation
It controls compressor capacity to adjust Tc to target value (Tcs) and Te to target value (Tes).
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