SiUS39-602
Protection Control
Function
59
4.
Protection Control
4.1
High Pressure Protection Control
This high pressure protection control is used to prevent the activation of protection devices due
to abnormal increase of high pressure and to protect compressors against the transient
increase of high pressure.
[In cooling operation]
[In heating operation]
High pressure not limited
Pc>505 psi
High pressure standby
INV upper limit frequency = 210 Hz
High pressure limited
Pc>505 psi
Pc>519 psi
Pc<464 psi
Pc>512 psi
STD compressor
standby for 5 mins
Pc: HP pressure sensor detection
value for each outdoor unit
When occurring 3 times within
30 min., HPS is activated without high
pressure standby, thus outputting the
malfunction code “E3”.
INV upper limit frequency :
3-step / 10 sec down from
current compressor frequency
INV upper limit frequency:
1-step / 20 sec up from
current compressor frequency
High pressure not limited
Pc>490 psi
Lower-priority compressor stops.
High pressure limited
Pc>490 psi
52 Hz + OFF
Pc>506 psi
High pressure standby
Pc>519 psi
Pc<435 psi
Pc: HP pressure sensor detection
value for master unit
When occurring 3 times within
30 min., HPS is activated without high
pressure standby, thus outputting the
malfunction code “E3” .
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...