Potential Relay Troubleshooting

Whenever possible the model number on the old relay should be used when ordering a new relay.

Potential relay troubleshooting.

The start cap is momentarily applied to the circuit then quickly disengaged. The above procedure simply mimics the action of the potential relay. This video explains the terminal arrangement of a potential relay how to wire it up and how it works. The relay does the same thing.

All you have to do is touch the ends of the. A simple ohmmeter is all that is needed to troubleshoot a potential relay. When used with a run capacitor a 15 000 ohm to 18 000 ohm 2 w bleed resistor should be attached to the start capacitor to prevent possible arcing when the relay contacts open. Potential starting relays consist of a high resistance coil and a set of normally closed contacts.

The resistance should read close to zero since there are normally closed contacts between terminals 1 and 2. I show the. The relay coil is across terminals 2 and 5 while the relay contacts are across terminals 1 and 2. A simple ohmmeter is all that is needed to troubleshoot a potential relay.

The coil is wired between terminals 2 and 5 with the contacts between terminals 1 and 2. Remember short out the start cap used above. Replacement relays can be cross referenced for different manufacturers using convenient tables via the internet. I ve used this procedure many times.

It s probably a bad potential relay. Potential relay operation and testing. Troubleshooting of a potential relay can be done with an ohmmeter.