Protection Control
SiUS371901E
117
Functions and Control
6. Protection Control
6.1
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.
Cooling
Normal control
21-step down
9-step up
9-step down
3-step up
2-step down
1-step up
2-step down
After 10 seconds
After 15 seconds
After 15 seconds
After 10 seconds
Pc > 3.57 MPa
(518 psi)
Pc > 3.70 MPa
(537 psi)
Pc < 3.14 MPa
(455 psi)
Pc < 3.45 MPa
(500 psi)
Pc > 3.67 MPa
(532 psi)
Pc > 3.62 MPa
(525 psi)
Pc > 3.57 MPa
(518 psi)
Compressor step: 1
After 15 seconds
Pc < 3.33 MPa (483 psi)
After 10 seconds
Upper limit compressor step: max (Max. Step)
Pc > 3.72 MPa
(540 psi)
Pc: High pressure sensor
detection value for each
outdoor unit
Current
step
maintained
Abnormal stop
(
E3
is displayed)
High pressure standby
(2 times within 40 minutes)
After 10
seconds
High pressure switch (4.0 MPa
(580 psi)) is activated
Summary of Contents for REYQ-XA
Page 1: ...Service Manual SiUS371901E REYQ72 456XATJU REYQ72 456XAYDU REYQ72 432XAYCU Heat Recovery 60 Hz...
Page 415: ...SiUS371901E Wiring Diagrams Appendix 402 REYQ144 168XATJU 2D119206A...
Page 416: ...Wiring Diagrams SiUS371901E 403 Appendix REYQ72 96 120XAYDU 2D119207B...
Page 417: ...SiUS371901E Wiring Diagrams Appendix 404 REYQ144 168XAYDU 2D119208B...
Page 418: ...Wiring Diagrams SiUS371901E 405 Appendix REYQ72 96 120 144 168XAYCU 2D119209A...
Page 421: ...SiUS371901E Wiring Diagrams Appendix 408 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 423: ...SiUS371901E Wiring Diagrams Appendix 410 FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 425: ...SiUS371901E Wiring Diagrams Appendix 412 FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU C 3D110467C...
Page 426: ...Wiring Diagrams SiUS371901E 413 Appendix FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 428: ...Wiring Diagrams SiUS371901E 415 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 429: ...SiUS371901E Wiring Diagrams Appendix 416 FXAQ07 09 12 18 24PVJU C 3D075354D...
Page 435: ...SiUS371901E Wiring Diagrams Appendix 422 VAM1200GVJU 3D073270D...
Page 437: ...SiUS371901E Wiring Diagrams Appendix 424 1 4 2 Multi Branch Selector Unit BS4Q54TVJ 3D089123B...
Page 438: ...Wiring Diagrams SiUS371901E 425 Appendix BS6 8Q54TVJ 2D089122B...
Page 439: ...SiUS371901E Wiring Diagrams Appendix 426 BS10 12Q54TVJ 2D089121B...
Page 440: ...Revision History Month Year Version Revised contents 04 2019 SiUS371901E First edition...
