SiENBE28-901
Troubleshooting
Air Cooled Refrigeration Condensing Unit
139
[Check 10] Voltage Characteristics of Pressure Sensor
PH = 1.38V
H
–0.69
PL = 0.57V
L
–0.28
PH : High pressure (MPa)
PL : Low pressure (MPa)
V
H
: Output voltage [High pressure side] V
DC
V
L
: Output voltage [Low pressure side] V
DC
Pressure detected
P
H
, P
L
(kg/cm
2
)
MPa
51.0
5.0
45.9
4.5
40.8
4.0
35.7
3.5
30.6
3.0
25.5
2.5
20.4
2.0
15.3
1.5
10.2
1.0
5.1
0.5
-5.1
-0.5
0
High pressure (P
H
)
(1.7MPa) Low pressure (P
L
)
-0.5
0
0.5
1
1.5
2
2.5
3
3.5
4
V
DC
Output voltage (V
H
, V
L
)
