V6R VRF 50Hz
33
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Table 3-5.6: Electric ball valve turn ON or OFF depending on the operation mode of the port.
ODU mode
IDU state
Electric ball valve
EVBA
EVBB
EVBC
Cooling only
Cooling
2950pls
0pls
2950pls
Cooling Thermo OFF
Fan
Error or Stop
Normal Simultaneous
Cooling / Heating
Error or Stop (OFF previously)
Maintain current
state
Maintain current
state
Maintain current
state
Cooling
2950pls
0pls
2950pls
Cooling Thermo OFF
Fan
Error or Stop (Cooling previously)
Heating
0pls
2950pls
2950pls
Heating Thermo OFF
Error or stop (Heating previously)
Heating only
Heating
Heating Thermo OFF
Fan
Error or Stop
mode conflict(Set the controller to display E0,
default)
mode conflict(Set the controller not to display
E0)
2950
0pls
2950pls
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
Setting
1 (Default)
2
3
4
5
6
7
8
Tes(C)
6 Auto
0 Auto
3 Auto
9 Fixed
6 Fixed
3 Fixed
0 Fixed
-3 Fixed
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
Setting
1 (Default)
2
3
4
5
6
7
8
Tcs(C)
48 Auto
50 Auto
45 Auto
42 Fixed
44 Fixed
46 Fixed
48 Fixed
51 Fixed
Simultaneous cooling and heating operation
It controls compressor capacity to adjust Tc to target value (Tcs) and Te to target value (Tes).
