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SiUS331708EA
Special Control
Functions and Control
46
3.1.2 Startup Control in Heating Operation
Thermostat ON
Outdoor unit
actuator
Electric symbol
Pressure equalization control
prior to startup
Startup control
24/36 class 48 class 60 class
STEP 1
STEP 2
Compressor
M1C
M1C
M1C
0 Hz
Minimum frequency
Increases 2 steps every 20 seconds
from minimum frequency
until Pc – Pe > 0.39 MPa
(56.6 psi) is achieved
Outdoor fan
M1F
M1F
M1F,
M2F
From starting
Ta > 20
°
C (68
°
F): STEP 1
Ta
≤
20
°
C (68
°
F): OFF
STEP 8
STEP 8
Four way valve
Y1S
Y1S
Y1S
Holds
ON
ON
Main electronic
expansion valve
Y1E
Y1E
Y1E
0 pulse
0 pulse
0 pulse
Subcooling
electronic
expansion valve
Y3E
0 pulse
0 pulse
0 pulse
Hot gas bypass
valve
Y2S
ON
OFF
OFF
Injection valve
Y3S
Y3S
OFF
OFF
OFF
Ending conditions
•
Pc – Pe < 0.3 MPa
(43.5 psi)
•
A lapse of 5 min.
A lapse of 10 sec.
•
A lapse of 130 sec.
•
Pc > 2.70 MPa
(392 psi)
•
Pc – Pe > 0.39 MPa
(56.6 psi)
OR
OR
Summary of Contents for RXSQ24TAVJU
Page 1: ...Service Manual SiUS331708EA RXSQ24 36 48 60TAVJU Heat Pump 60 Hz...
Page 290: ...Wiring Diagrams SiUS331708EA 277 Appendix RXSQ48TAVJU 3D109546A...
Page 291: ...SiUS331708EA Wiring Diagrams Appendix 278 RXSQ60TAVJU 3D109547A...
Page 295: ...SiUS331708EA Wiring Diagrams Appendix 282 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 298: ...Wiring Diagrams SiUS331708EA 285 Appendix FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 300: ...Wiring Diagrams SiUS331708EA 287 Appendix FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU 3D110467B...
Page 301: ...SiUS331708EA Wiring Diagrams Appendix 288 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 302: ...Wiring Diagrams SiUS331708EA 289 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 303: ...SiUS331708EA Wiring Diagrams Appendix 290 FXAQ07 09 12 18 24PVJU 3D075354C...
Page 309: ...SiUS331708EA Wiring Diagrams Appendix 296 VAM1200GVJU 3D073270D...