Si39-504
Special Control
Function
77
3.
Special Control
3.1
Startup Control
This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the
compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor.
In addition, to avoid stresses to the compressor due to oil return or else after the startup, the following control is made
and the position of the four way valve is also determined.
3.1.1 Startup Control in Cooling Operation
3.1.2 Startup Control in Heating Operation
Thermostat ON
Pressure equalization
control prior to startup
Startup control
STEP1
STEP2
Compressor
OFF
52Hz
+OFF +OFF
+2 steps/20 sec.
(until Pc - Pe>0.39MPa is achieved)
Outdoor unit fan
OFF
OFF
+1 step/15 sec. (when Pc>2.16MPa)
-1 step/15 sec. (when Pc<1.77MPa)
Four way valve
OFF
OFF
OFF
Main motorized valve (EV1)
0 pls
2000 pls
2000 pls
Subcooling motorized valve
(EV2)
0 pls
0 pls
0 pls
Hot gas bypass valve
(SVP)
ON (RXYQ5MA model)
OFF (RXYQ8 ~ 16MA models)
ON
ON
Receiver gas discharging
valve (SVG)
OFF
OFF
OFF
Non-operating unit liquid
pipe stop valve (SVSL)
ON
ON
ON
Ending conditions
RXYQ5MA model
•
Pc - Pe<0.20MPa
•
A lapse of three
minutes
RXYQ8 ~ 16MA models
• A lapse of 15 sec.
A lapse of 5 sec.
•
A lapse of 320 sec.
•
Pc - Pe>0.39MPa
•
OR
OR
Thermostat ON
Pressure equalization
control prior to startup
Startup control
STEP1
STEP2
Compressor
OFF
52Hz
+OFF +OFF
+2 steps/20 sec.
(until Pc - Pe>0.39MPa is achieved)
Outdoor unit fan
STEP4
OFF
STEP8
Four way valve
ON
ON
ON
Main motorized valve (EV1)
0 pls
0 pls
0 pls or 180 pls
Subcooling motorized valve
(EV2)
0 pls
0 pls
0 pls
Hot gas bypass valve
(SVP)
ON (RXYQ5MA model)
OFF (RXYQ8 ~ 16MA models)
ON
ON
Receiver gas discharging
valve (SVG)
OFF
OFF
OFF
Non-operating unit liquid
pipe stop valve (SVSL)
ON
ON
ON
Ending conditions
RXYQ5MA model
•
Pc - Pe<0.20MPa
•
A lapse of three
minutes
RXYQ8 ~ 16MA models
• A lapse of 15 sec.
A lapse of 5 sec.
•
A lapse of 130 sec.
•
Pc>2.94MPa
•
OR
OR
Summary of Contents for VRV II RXYQ5MATL
Page 53: ...Specifications Si39 504 42 Specifications...
Page 115: ...Outline of Control Indoor Unit Si39 504 104 Function...
Page 161: ...Field Setting Si39 504 150 Test Operation...
Page 172: ...Si39 504 Troubleshooting by Remote Controller Troubleshooting 161...
Page 266: ...Si39 504 Piping Diagrams Appendix 255 RXYQ8MA 10MA 12MAYL E TL E 3D048033A...
Page 267: ...Piping Diagrams Si39 504 256 Appendix RXYQ14MA 16MAYL E TL E 3D048034A...
Page 271: ...Wiring Diagrams for Reference Si39 504 260 Appendix RXYQ8MA 10MA 12MAYL E 3D047088C...
Page 272: ...Si39 504 Wiring Diagrams for Reference Appendix 261 RXYQ14MA 16MAYL E 3D047089C...
Page 273: ...Wiring Diagrams for Reference Si39 504 262 Appendix 2 1 2 RXYQ MATL E RXYQ5MATL E 3D049059A...
Page 274: ...Si39 504 Wiring Diagrams for Reference Appendix 263 RXYQ8MA 10MA 12MATL E 3D049060A...
Page 275: ...Wiring Diagrams for Reference Si39 504 264 Appendix RXYQ14MA 16MATL E 3D049061A...
Page 283: ...Wiring Diagrams for Reference Si39 504 272 Appendix FXCQ40M 50M 80M 125MVE 3D039557A...
Page 285: ...Wiring Diagrams for Reference Si39 504 274 Appendix FXKQ25M 32M 40M 63MVE 3D039564B...
Page 289: ...Wiring Diagrams for Reference Si39 504 278 Appendix FXMQ40M 50M 63M 80M 100M 125MVE 3D039620B...
Page 290: ...Si39 504 Wiring Diagrams for Reference Appendix 279 FXMQ200M 250MVE 3D039621B...
Page 291: ...Wiring Diagrams for Reference Si39 504 280 Appendix FXHQ32M 63M 100MVE 3D039801D...
Page 292: ...Si39 504 Wiring Diagrams for Reference Appendix 281 FXAQ20M 25M 32MVE 40M 50M 63MVE 3D034206C...
Page 309: ...Selection of Pipe Size Joints and Header Si39 504 298 Appendix Note 1...
Page 315: ...Method of Replacing The Inverter s Power Transistors and Diode Modules Si39 504 304 Appendix...