OPERATION & SERVICE
Contactor Inspection
A thorough visual inspection of the contactors used on Electronic Control Models should be performed as part of any regular maintenance program and whenever the water heater is being serviced. Refer to the listed Steps and images below for this procedure.
1Secure power to the water heater at the main breaker or disconnect switch.
2Verify with an AC volt meter that there is not any voltage present at the Power Distribution Block, power circuit fuse block and all wiring terminals on the contactors. See Figure 2 on page 9 for the location of these components.
3Remove the top cover (two small screws) from the contactor.
4Check for and remove any debris from the area surrounding the switch contacts. IE: ants will occasionally infest the switch contacts and eventually cause the contactor to malfunction.
5Physically test the mechanical spring action of the contactor by depressing the contactor mechanism. If the action is not smooth and/or sticks - replace the contactor.
6Perform a close visual inspection of the switch contacts. The contacts are silver plated and should be smooth. Contactor chatter (see pages 6 & 34), voltage spikes, arcing, excessive current along with normal wear and tear can cause the normally smooth surface of the contacts to become burnt, pitted and damaged. In extreme cases the contacts can “weld” closed. The switch contacts are not replaceable. If the contacts show signs of excessive wear - replace the contactor.
7Replace the top cover on all contactors when inspection is complete.
Top View Cover Plate On | Side View Cover Plate Removed | Physically Operate Mechanical | ||||
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| Spring Action Of Contactor | ||
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| Press Down Here | ||
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Perform Close Visual Inspection
Of Switch Contacts
Servicing should only be performed by a Qualified Service Agent
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