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ESIE12-06
CHECK 5
Check Pressure Sensor
Measure the voltage (DC) between pins 1 and 3 of the connector.
Service Diagnosis
Outdoor unit PCB (A1P)
GND
Micr-ocomputer
A/D input
Measure DC voltage here.
Detected Pressure
P
H
(Kg/cm²) 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
0
0
-5.1
-0.5
-0.5
0
0.5
+5V
Connector Red
P
H
1
1.5
2
2.5
3
3.5
Output voltage (V
)
H
This graph is available for both high pressure sensor
and low pressure sensor.
Red
Black
White
P
= 1.38V
– 0.69
H
H
P
: Detected pressure (MPa)
H
V
: Output voltage (V)
H
4
V
DC
247
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Troubleshooting
