SiAU18-715 Basic Control
Function 77
2. Basic Control
2.1 Normal Operation
Cooling Operation
Heating Operation
★
Heating operation is not functional at an outdoor air temperature of 24
°
CDB or more.
Actuator Operation Remarks
Compressor Compressor PI control
Used for high pressure protection control, low
pressure protection control, discharge pipe
temperature protection control, and compressor
operating frequency upper limit control with
inverter protection control.
Outdoor unit fan Cooling fan control
Four way valve OFF
Main electronic expansion valve (EV1) 480 pls
Subcooling electronic expansion valve
(EV3)
PI control
Hot gas bypass valve (SVP) OFF
This valve turns on with low pressure protection
control.
Actuator Operation Remarks
Compressor Compressor PI control
Used for high pressure protection control, low
pressure protection control, discharge pipe
temperature protection control, and compressor
operating frequency upper limit control with
inverter protection control.
Outdoor unit fan STEP 7 or 8
Four way valve ON
Main electronic expansion valve (EV1) PI control
Subcooling electronic expansion valve
(EV3)
PI control
Hot gas bypass valve (SVP) OFF
This valve turns on with low pressure protection
control.
To Next Page
Loading...
Need help?
General
