Potential Relay Troubleshooting

It s probably a bad potential relay.

Potential relay troubleshooting.

The start cap is momentarily applied to the circuit then quickly disengaged. A simple ohmmeter is all that is needed to troubleshoot a potential relay. Troubleshooting of a potential relay can be done with an ohmmeter. I ve used this procedure many times.

Remember short out the start cap used above. My paperback and e book. Potential relay operation and testing. The coil is wired between terminals 2 and 5 with the contacts between terminals 1 and 2.

The relay does the same thing. A simple ohmmeter is all that is needed to troubleshoot a potential relay. The above procedure simply mimics the action of the 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.

The resistance should read close to zero since there are normally closed contacts between terminals 1 and 2. Knowing the sequence of operation for this type of starting relay can help you diagnose confirm or rule out certain service problems. Whenever possible the model number on the old relay should be used when ordering a new relay. All you have to do is touch the ends of the.

After taking all of the connecting wires off of the potential relay measure the resistance across the 1 and 2 terminals. The relay coil is across terminals 2 and 5 while the relay contacts are across terminals 1 and 2. This video explains the terminal arrangement of a potential relay how to wire it up and how it works.