SiENBE18-621
Basic Control
Function
61
2. Basic Control
2.1
Normal Operation
"
Cooling Operation
"
Heating Operation
H
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.
Summary of Contents for BPMKS967B2B
Page 1: ...SiENBE18 621 E Series Service Manual Applied Models Super Multi Plus Heat Pump...
Page 12: ...SiENBE18 621 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Page 19: ...List of Functions SiENBE18 621 8 List of Functions...
Page 33: ...Specifications SiENBE18 621 22 Specifications...
Page 69: ...Refrigerant Flow for Each Operation Mode SiENBE18 621 58 Refrigerant Circuit...
Page 121: ...Indoor Unit SkyAir Models SiENBE18 621 110 Function...
Page 169: ...Instruction SiENBE18 621 158 System Configuration FTXS 20 25 35C Indoor Unit...
Page 371: ...Method of Replacing The Inverter s Power Transistors Modules SiENBE18 621 360 Troubleshooting...
Page 393: ...SiENBE18 621 vi Index...