Basic Control; Normal Operation - Daikin Super Multi Plus E-Series FTXG25EV1BW Service Manual

Basic Control

2. Basic Control

2.1

Normal Operation

[Cooling Operation]
Actuator
Compressor
Outdoor fan
Four way valve (Y1S)
Main electronic expansion valve (Y1E)
Subcooling electronic expansion valve
(Y3E)
Hot gas bypass valve (Y2S)
[Heating Operation]
Actuator
Compressor
Outdoor fan
Four way valve (Y1S)
Main electronic expansion valve (Y1E)
Subcooling electronic expansion valve
(Y3E)
Hot gas bypass valve (Y2S)
★ Heating operation does not function when the outdoor temperature is above 24 ° CDB.
78
Operation
Compressor PI control
Cooling fan control
OFF
480 pls
PI control
OFF
Operation
Compressor PI control
STEP 7 or 8
ON
PI control
PI control
OFF
Remarks
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.




This valve turns on with low pressure protection
control.
Remarks
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.




This valve turns on with low pressure protection
control.
SiBE18-821_C
Function