Jandy AquaLink RS series, Troubleshooting Manual

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Page 21
5.3 Water Temperature Sensor
5.3.1 Troubleshooting
When the Power Center PCB is put in Service or Time Out Mode, the thermostat setting will automatically be
switched to 104° F for testing. If the heater circuit is activated and the water heater temperature is less than 104° F, the
LED above the heater button should turn on. If it does not
fi re, the problem is caused by either the Water Temperature
Sensor or the PCB. Test the sensor as indicated below.
Remove the green terminal bar from the Power Center PCB. Place a good thermometer in the
fl ow of water for the
body of water to be tested (e.g. pool skimmer) and turn on the fi lter pump. Set your test meter to resistance at or above
20 K Ohms. Test between terminals fi ve (5) and six (6) on the green terminal bar. Compare the reading to the chart. If
the reading and chart do not match, replace the sensor.
Table 5. Temperature and Resistance Chart
Temp Resistance Temp Resistance
50°F
19.898 K Ohms
78°F
9.735 K Ohms
51°F 19.435 K Ohms 79°F 9.483 K Ohms
52°F
18.871 K Ohms
80°F
9.284 K Ohms
53°F 18.382 K Ohms 81°F 9.079 K Ohms
54°F
17.902 K Ohms
82°F
8.864 K Ohms
55°F 17.473 K Ohms 83°F 8.655 K Ohms
56°F
16.988 K Ohms
84°F
8.450 K Ohms
57°F
16.549 K Ohms
85°F
8.253 K Ohms
58°F
16.150 K Ohms
86°F
8.057 K Ohms
59°F
15.710 K Ohms
87°F
7.871 K Ohms
60°F 15.314 K Ohms 88°F 7.687 K Ohms
61°F
14.923 K Ohms
89°F
7.509 K Ohms
62°F 14.547 K Ohms 90°F 7.335 K Ohms
63°F
14.193 K Ohms
91°F
7.166 K Ohms
64°F 13.823 K Ohms 92°F 7.001 K Ohms
65°F
13.477 K Ohms
93°F
6.840 K Ohms
66°F
13.138 K Ohms
94°F
6.685 K Ohms
67°F
12.813 K Ohms
95°F
6.531 K Ohms
68°F
12.492 K Ohms
96°F
6.384 K Ohms
69°F 12.186 K Ohms 97°F 6.238 K Ohms
70°F
11.893 K Ohms
98°F
6.099 K Ohms
71°F 11.593 K Ohms 99°F 5.963 K Ohms
72°F
11.309 K Ohms
100°F
5.829 K Ohms
73°F 11.032 K Ohms 101°F 5.700 K Ohms
74°F
10.765 K Ohms
102°F
5.572 K Ohms
75°F
10.502 K Ohms
103°F
5.449 K Ohms
76°F 10.250 K Ohms 104°F 5.327 K Ohms
77°F
10.000 K Ohms