![background image](http://html1.mh-extra.com/html/daikin/ftks50bvmb/ftks50bvmb_service-manual_501473108.webp)
SiEN18-622
Basic Control
Function
95
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 FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...