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Special Control
SiUS39-602
48
Function
3.
Special Control
3.1
Startup Control
This startup control is used to provide the following control to reduce the compressor load
resulting from liquid return or else during compressor startup, and also determine the position of
four way valves.
3.1.1 Startup Control in Cooling Operation
Note 1.
Hold : maintain the previous position before entering this operation.
Note 2.
ON at starting immediately after power is on.
Note 3.
SVO is open even independent outdoor unit installation.
Actuator
Pressure equalization
before start-up
Starting control
Step1
Step2
Compressor
OFF
52Hz + OFF
Compressor operating frequency
increases by 2 step/20 sec. until Pc -
Pe > 58 psi
Outdoor unit fan
OFF
OFF
1-step/15 sec. increases with
Pc > 319 psi
1-step/15 sec. decreases with
Pc < 261 psi
Four way valve 1
OFF
OFF
OFF
Four way valve 2
Hold *Note 1
OFF
OFF
Main motorized valve (EV1)
0 pls
1400 pls
1400 pls
Sub motorized valve (EV2)
0 pls
1400 pls
1400 pls
Sub-cooling motorized valve (EV3)
0 pls
0 pls
0 pls
Hot gas bypass valve (SVP)
OFF
ON
ON
Oil equalization valve (SVO)
OFF
ON
ON *Note 3
Receiver charging valve (SVL)
OFF
OFF
OFF
Receiver discharge valve (SVG)
OFF
OFF
OFF
Discharge pipe stop valve (SVR)
Hold
Hold
OFF
Non-operating unit liquid pipe stop
valve (SVSL)
ON
OFF
OFF
High pressure gas pipe pressure
reduction valve (SVC)
Hold
*Note 2
OFF
OFF
Ending conditions
1 min.
5 sec.
•
320 sec.
•
Pc - Pe > 58 psi
or
Summary of Contents for REYQ72
Page 35: ...Specifications SiUS39 602 24 Specifications...
Page 121: ...Field Setting SiUS39 602 110 Test Operation...
Page 129: ...Troubleshooting by Remote Controller SiUS39 602 118 Troubleshooting...
Page 225: ...Troubleshooting OP Unified ON OFF Controller SiUS39 602 214 Troubleshooting...
Page 232: ...SiUS39 602 Piping Diagrams Appendix 221 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338...
Page 235: ...Wiring Diagrams for Reference SiUS39 602 224 Appendix REYQ144 168 192MTJU C 3D050354A...
Page 240: ...SiUS39 602 Wiring Diagrams for Reference Appendix 229 2 4 BS Unit BSVQ36M 60MVJU 3D045069A...
Page 249: ...Example of Connection R 410A Type SiUS39 602 238 Appendix...
Page 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 602 244 Appendix...
Page 265: ...Precautions for New Refrigerant R 410A SiUS39 602 254 Precautions for New Refrigerant R 410A...
Page 269: ...SiUS39 602 iv Index...