York YCUL0045E, Installation Operation & Maintenance

Page: 102 / 144

JOHNSON CONTROLS
102
FORM 150.63-NM8 (1020)
SERVICE AND TROUBLESHOOTING
Suction Temperature Sensor - System 1
J8-5 = +5 VDC regulated supply to sensor.
J8-8 = VDC input signal to the I/O Board. See
Table 31 for voltage readings that correspond
to specific suction temperatures.
J8-2 = drain (shield connection = 0 VDC)
TABLE 31 – SUCTION TEMP. SENSOR
TEMPERATURE/VOLTAGE/
RESISTANCE CORRELATION
TEMP °F VOLTAGE RESISTANCE TEMP °C
0 1.71 25619 -18
2 1.78 24046 -17
4 1.85 22580 -16
6 1.93 21214 -14
8 2.00 19939 -13
10 2.07 18749 -12
12 2.15 17637 -11
14 2.22 16599 -10
16 2.30 15629 -9
18 2.37 14721 -8
20 2.45 13872 -7
22 2.52 13077 -6
24 2.59 12333 -4
26 2.67 11636 -3
28 2.74 10982 -2
30 2.81 10370 -1
32 2.88 9795 0
34 2.95 9256 1
36 3.02 8750 2
38 3.08 8276 3
40 3.15 7830 4
42 3.21 7411 6
44 3.27 7017 7
46 3.33 6647 8
48 3.39 6298 9
50 3.45 5970 10
52 3.51 5661 11
54 3.56 5370 12
56 3.61 5096 13
58 3.67 4837 14
60 3.72 4593 16
62 3.76 4363 17
64 3.81 4145 18
66 3.86 3941 19
68 3.90 3747 20
70 3.94 3564 21
72 3.98 3392 22
74 4.02 3228 23
76 4.06 3074 24
78 4.10 2928 26
80 4.13 2790 27
Suction Temperature Sensor - System 2
J10-5 = +5 VDC regulated supply to sensor.
J10-8 = VDC input signal to the I/O Board. See Table
31 for voltage readings that correspond to
specific suction temperatures.
J10-2
= drain (shield connection = 0 VDC )