American Standard 4A6V8024A1000B, Service Facts

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18 4A-V8-SF-1G-EN
SENSORS
Compressor Dome Temperature
This table shows the corresponding voltage, resistance
and temperature readings for the Dome Temperature
Sensor when measured across pins 1 and 10. The
power source for the Dome Temperature Sensor is
3.2VDC.
TEMP F TEMP C
THERMISTOR
RESISTANCE
(OHMS)
VOLTS DC
(PIN TO PIN)
-15 -26.11 139453 3.13
-10 -23.33 118062 3.11
-5 -20.56 100258 3.10
0 -17.78 85393 3.08
5 -15.00 72944 3.06
10 -12.22 62487 3.04
15 -9.44 53676 3.02
20 -6.67 46232 2.99
25 -3.89 39925 2.96
30 -1.11 34567 2.93
35 1.67 30003 2.89
40 4.44 26105 2.85
45 7.22 22767 2.80
50 10.00 19903 2.75
55 12.78 17438 2.70
60 15.56 15312 2.64
65 18.33 13475 2.58
70 21.11 11883 2.51
75 23.89 10501 2.45
80 26.67 9298 2.37
85 29.44 8249 2.30
90 32.22 7333 2.22
95 35.00 6530 2.14
100 37.78 5826 2.06
105 40.56 5208 1.97
110 43.33 4663 1.89
115 46.11 4182 1.80
120 48.89 3758 1.72
125 51.67 3382 1.63
130 54.44 3048 1.55
135 57.22 2752 1.47
140 60.00 2488 1.39
145 62.78 2253 1.31
150 65.56 2043 1.24
155 68.33 1856 1.17
160 71.11 1688 1.10
165 73.89 1537 1.03
170 76.67 1402 0.97
175 79.44 1280 0.91
180 82.22 1170 0.85
185 85.00 1071 0.80
190 87.78 982 0.74
195 90.56 901 0.70
200 93.33 828 0.65
205 96.11 762 0.61
210 98.89 702 0.57
215 101.67 647 0.53
TEMP F TEMP C
THERMISTOR
RESISTANCE
(OHMS)
VOLTS DC
(PIN TO PIN)
220 104.44 597 0.50
225 107.22 552 0.47
230 110.00 511 0.44
235 112.78 473 0.41
240 115.56 438 0.38
245 118.33 407 0.36
250 121.11 378 0.33
255 123.89 351 0.31
260 126.67 327 0.29
265 129.44 304 0.27
270 132.22 284 0.26
275 135.00 265 0.24
280 137.78 247 0.23
285 140.56 231 0.21
290 143.33 216 0.20
295 146.11 203 0.19
300 148.89 190 0.18
305 151.67 178 0.17
310 154.44 167 0.16
315 157.22 157 0.15
320 160.00 148 0.14
325 162.78 139 0.13
330 165.56 131 0.12
Figure 6. Dome Temperature Sensor
Pin 1 & 10 (Red)
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18
A working Compressor Dome Temperature Sensor is
required for:
• Protection (High/Low Temperature)
• Preheating (Sump Heat)
• Outdoor EEV Control
• Diagnostics; Reverse rotation, Flooding, Charge
Level
The Dome Temperature Sensor control contains an
NTC thermistor input for sensing the Compressor
Dome Temperature. The thermistor has a nominal
resistance of
≈ 10k ohms at 75°F. The minimum range
required for the Dome Temperature input is —31°F to
302°F. when measured across pins 1 and 10.
N No otte e:: Secure Installation of Dome Sensor is required
for reliable compressor & system operation.