FORM 201.26-NM1
ISSUE DATE: 1/19/2018
SECTION 9 – SERVICE AND TROUBLESHOOTING
JOHNSON CONTROLS
160
Liquid and Refrigerant Sensor Test Points
(
)
Entering Chilled Liquid Sensor
J6-5 = +5VDC regulated supply to sensor.
J6-8 = VDC input signal to the I/O board.
See Table
22 on page 160 for voltage readings that cor-
respond to specific liquid temperatures.
J6-2 = drain (shield connection = 0VDC) Return
Leaving Chilled Liquid Temperature Sensor
J6-4 = +5VDC regulated supply to sensor.
J6-7 = VDC input signal to the microboard.
22 on page 160 for voltage readings that cor-
respond to specific liquid temperatures.
J6-1 = drain (shield connection = 0VDC) Return
TABLE 22 -
ENTERING/LEAVING CHILLED LIQUID
TEMP. SENSOR, TEMPERATURE / VOLTAGE COR-
RELATION
TEMP °F
VOLTAGE
(SIGNAL INPUT
TO RETURN)
TEMP °C
10
1.33
-12
12
1.39
-11
14
1.46
-10
16
1.51
-9
18
1.58
-8
20
1.65
-7
22
1.71
-6
24
1.78
-4
26
1.85
-3
28
1.91
-2
30
1.98
-1
32
2.05
0
34
2.12
1
36
2.19
2
38
2.26
3
40
2.33
4
42
2.40
6
44
2.47
7
46
2.53
8
48
2.60
9
50
2.65
10
52
2.73
11
54
2.80
12
56
2.86
13
58
2.92
14
60
2.98
16
62
3.05
17
64
3.11
18
66
3.17
19
68
3.23
20
70
3.29
21
72
3.34
22
74
3.39
23
76
3.45
24
78
3.5
26
80
3.54
27
Summary of Contents for YCWL0056SE
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