SiUS34-907
Protection Control
Function
43
4.2
Low Pressure Protection Control
This low pressure protection control is used to protect compressors against the transient decrease of low
pressure.
[In cooling operation]
[In heating operation]
Pe<36.3 psi
36Hz Unload
Pe>56.6 psi
Pe<10.2 psi
Lo
w
press
u
re not limited
Lo
w
-press
u
re
stand
b
y
Lo
w
press
u
re
limited
Pe: Lo
w
-press
u
re sensor detection
v
al
u
e
W
hen occ
u
rring 3 times
w
ithin 30 min.,
the malf
u
nction code "E4" is o
u
tp
u
t.
Pe<21.
8
psi
Pe>43.5 psi
Hot gas S
V
P = OFF
Hot gas S
V
P = O
N
&
• Ts-Teg<14.4 degree
• Pe>
8
.7 psi
• Pe>13.1 psi
or
After 10 sec.
Pe<24.7 psi
Pe<24.7 psi
Pe>29 psi
Pe< 10.2 psi
C
u
rrent step limited
After 15 sec.
Lo
w
press
u
re not limited
Lo
w
press
u
re limited
I
NV
.
u
pper limit fre
qu
ency :
1-step
u
p from c
u
rrent
compressor fre
qu
ency
Pe: Lo
w
-press
u
re sensor detection
v
al
u
e
I
NV
.
u
pper limit fre
qu
ency :
3-step do
w
n from c
u
rrent
W
hen occ
u
rring 3 times
w
ithin 30 min.,
the malf
u
nction code "E4" is o
u
tp
u
t.
Lo
w
-press
u
re
stand
b
y
Pe<17.4 psi
Pe>24.7 psi
Hot gas S
V
P = OFF
Hot gas S
V
P = O
N
Summary of Contents for VRV III-S RXYMQ36 48PVJU
Page 1: ...RXYMQ36 48PVJU R 410A Heat Pump 60Hz SiUS34 907...
Page 9: ...SiUS34 907 Safety Considerations viii...
Page 237: ...Wiring Diagrams SiUS34 907 228 Appendix 2 2 Field Wiring RXYMQ36 48PVJU 3D065370...
Page 238: ...SiUS34 907 Wiring Diagrams Appendix 229 2 3 Indoor Unit FXFQ12M 18M 24M 30M 36MVJU 3D042620C...
Page 239: ...Wiring Diagrams SiUS34 907 230 Appendix FXZQ07M 09M 12M 18MVJU 3D059263...
Page 240: ...SiUS34 907 Wiring Diagrams Appendix 231 FXDQ07M 09M 12M 18M 24MVJU 3D050501A...
Page 241: ...Wiring Diagrams SiUS34 907 232 Appendix FXMQ07P 09P 12P 18P 24P 30P 36P 48PVJU 3D065984A...
Page 242: ...SiUS34 907 Wiring Diagrams Appendix 233 FXHQ12M 24M 36MVJU 3D048116A...
Page 243: ...Wiring Diagrams SiUS34 907 234 Appendix FXAQ07M 09M 12M 18M 24MVJU 3D046039D...
Page 244: ...SiUS34 907 Wiring Diagrams Appendix 235 FXLQ12M 18M 24MVJU FXNQ12M 18M 24MVJU 3D045644A...
Page 247: ...Option List SiUS34 907 238 Appendix...
Page 249: ...Example of Connection 240...
Page 263: ...Precautions for New Refrigerant R 410A SiUS34 907 254 Precautions for New Refrigerant R 410A...
