Daikin VRV - WII, Service Manual

Page: 78 / 312

SiUS30-604 Normal Control
Function 65
5. Normal Control
5.1 Compressor Control
5.1.1 Compressor Control
Compressor PI Control
Carries out the compressor capacity PI control to maintain Te at constant during cooling operation
and Tc at constant during heating operation to ensure stable unit performance.
[Cooling operation]
[Heating operation]
[Cooling/Heating simultaneous operation]
Controls compressor capacity to adjust Te to
achieve target value (TeS). Te : Low pressure equivalent saturation temperature
(°F)
Te setting TeS : Target Te value
(Varies depending on Te setting, operating frequency,
etc.)
L M (Normal)
(factory
setting)
H
37.4 42.8 48.2
Controls compressor capacity to adjust Tc to
achieve target value (TcS). Tc : High pressure equivalent saturation temperature
(°F)
Tc setting TcS : Target Tc value
(Varies depending on Tc setting, operating frequency,
etc.)
L M (Normal)
(factory
setting)
H
109.4 114.8 120.2
Controls compressor capacity to adjust Te to achieve target value (TeS) and Tc to achieve target value
(TcS) at the same time.
Te setting
L M (Normal)
(factory
setting)
H Te : Low pressure equivalent saturation temperature
(°F)
TeS : Target Te value
(Varies depending on Te setting, operating frequency,
etc.)
37.4 42.8 48.2
Tc setting
L M (Normal)
(factory
setting)
H Tc : High pressure equivalent saturation temperature
(°F)
TcS : Target Tc value
(Varies depending on Tc setting, operating frequency,
etc.)
109.4 114.8 120.2