SiUS342004EB
Protection Control
Part 4 Functions and Control
94
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
N
ormal control
21-step do
w
n
9-step up
9-step do
w
n
3-step up
2-step do
w
n
1-step up
2-step do
w
n
After 10 seconds
After 15 seconds
After 15 seconds
After 10 seconds
Pc > 3.57 MPa
(51
8
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
(51
8
psi)
Compressor step: 1
After 15 seconds
Pc < 3.33 MPa (4
8
3 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
w
ithin 40 minutes)
After 10
seconds
High pressure s
w
itch (4.0 MPa
(5
8
0 psi)) is activated
Summary of Contents for VRV RXYQ72-384XAYCA
Page 1: ...Service Manual RXYQ72 384XAYCA RXYQ72 384XBYCA Heat Pump 60 Hz SiUS342004EB...
Page 395: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 388 FXFQ07 09 12 15 18 24 30 36 48TVJU 3D086460B...
Page 397: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 390 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 401: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 394 FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 402: ...Wiring Diagrams SiUS342004EB 395 Part 7 Appendix FXDQ07 09 12 18 24MVJU C 3D050501C...
Page 409: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 402 FXHQ12 24 36MVJU 3D048116C...
Page 410: ...Wiring Diagrams SiUS342004EB 403 Part 7 Appendix FXAQ07 09 12 18 24PVJU 3D075354F...
Page 418: ...Wiring Diagrams SiUS342004EB 411 Part 7 Appendix VAM1200GVJU 3D073270D...
