SERVICE (cont.)
Electronic Controls (cont.)
Liquid Level Control Test Procedure
1.Disconnect the dispenser from the power source.
2.Check the voltage across terminals 3 & 4 of the electronic control assembly with a voltmeter. Connect the dispenser to the power source. The indication must be 200 to 240 volts ac for 200 to 240 volt models.
3.Disconnect the dispenser from the power source. If voltage was present as described, proceed to #4. If voltage was not present as described, refer to the Wiring Diagrams and check the dispenser wiring harness.
4.Remove the pink wire from terminal 5 of the elec- tronic control assembly.
5.Check the voltage across terminals 1 & 4 of the elec- tronic control assembly with a voltmeter. Connect the dispenser to the power source. The indication must be 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 seconds.
6.Disconnect the dispenser from the power source.
If voltage was present as described, the liquid level control of the system is operating properly, proceed to #7.
If voltage was not present as described, replace the electronic control assembly and the temperature sen- sor in the tank lid.
NOTE - Each electronic control assembly is calibrated to a temperature sensor. Both components MUST be replaced as a set.
7.Reconnect the pink wire to terminal 5 of the elec- tronic control assembly.
8.Loosen the compression fitting, remove the probe from the tank lid, and inspect it for mineral depos- its. Replace it if necessary. Keep the exposed ends of the probe away from any metal surface of the dispenser.
9.Check the voltage across the terminals 1 & 4 of the electronic control assembly with a voltmeter. Connect the dispenser to the power source. The indication must be 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 seconds.
10.Touch the screw head end of the probe to the dis- penser housing. The indication must be 0.
11.Move the probe away from the dispenser housing. The indication must again be 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 seconds.
12.Disconnect the dispenser from the power source.
If voltage was present as described, reinstall the probe, the sensing function of the system is operating properly.
If voltage was not present as described, check the pink probe wire and the green ground wire for continuity and/or replace the probe.
Temperature control Flow Charts
11 | 10889 091599 |
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