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14. Pressure Sensor Output Check
Outdoor Unit
Pd sensor characteristics
0 to 4.15 MPa (0.5 to 4.73V output for 0 to 4.15 MPa)
Voltage readings across pins 2 and 3 of CN501 on indoor unit main P.C. board (with negative-side probe of
multimeter placed on pin 3)
VOLT
Pd
(MPa)
(kg/cm
0.61
0.10
0.70
0.20
0.80
0.30
0.90
0.39
1.00
0.49
1.25
0.74
1.52
1.00
1.78
1.25
2.03
1.50
2.29
1.75
Outdoor Unit
PS sensor characteristics
0 to 2.0 MPa (0.5 to 5V output for 0 to 2.0 MPa)
Voltage readings across pins 2 and 3 of CN500 on indoor unit main P.C. board (with negative-side probe of
multimeter placed on pin 3)
VOLT
Ps
(MPa)
(kg/cm
0.59
0.05
0.69
0.10
0.89
0.20
1.10
0.30
1.30
0.40
1.49
0.50
1.69
0.60
1.90
0.70
2.10
0.80
2.29
0.90
Pd
VOLT
Pd
2
)
(MPa)
1.1
2.54
2.00
2.0
2.79
2.25
3.0
3.05
2.50
4.0
3.30
2.75
5.0
3.56
3.00
7.5
3.81
3.25
10.2
4.08
3.51
12.8
4.32
3.74
15.3
4.59
4.01
17.9
4.73
4.15
VOLT
Ps
Ps
2
)
(MPa)
0.5
2.49
1.00
1.0
2.70
1.10
2.0
2.90
2.90
3.1
3.09
3.09
4.1
3.29
3.29
5.1
3.50
3.50
6.1
3.70
3.70
7.2
4.09
4.09
8.2
4.50
4.50
9.2
4.89
4.89
Pd
2
(kg/cm
)
20.4
22.9
25.5
28.0
30.5
33.1
35.8
38.2
40.9
42.3
Ps
2
(kg/cm
)
10.2
11.2
12.2
13.2
14.2
15.3
16.3
18.3
20.4
22.4
– 102 –
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Troubleshooting
