Jandy SHPM 20 Pump Not starting

[lcchan]

The Jandy SHPM20 filter pump for my Florida pool would not turn on this morning. I opened up the capacitor cover, detached the capacitor and found no voltage across the terminal wires. I suspect that the 10-year old motor is bad and has to be replaced. I would really appreciate any help on this. Thanks.

 

[mas985]

There won't be any voltage across the capacitor terminals unless the pump was turned on (power going to the motor). Was it turned on?

If you are trying to test for voltage, the best place is the terminal block in back of the pump motor.

Do you here a hum when the pump is suppose to turn on?

 

[lcchan]

Thanks for the reply.
Pump was turned on when voltage was measured and there was no humming noise.

 

[JamesW]

Check voltage at motor terminals.

 

[lcchan]

Check voltage at motor terminals.

Checked voltage at the motor terminals and found 0v. Then disconnected the power from pump and found that the problem is with the relay. Problem is now fixed. Thanks for the help.

 

[JamesW]

Good job. Thanks for the update.

 

[lcchan]

The job is not yet done, however. I mistakenly took out the four (4) long screws in the back of the motor. Now I cannot put them back in. Is there an easy way to put them back in without having to detaching the motor from the pump housing ? My motor is made by A.O.Smith, There is no part number on the label. But I was going to replace it with the A.O.Smith B855.

 

[JamesW]

Did the long screws unscrew or break off?

Did the back plate rotate out of position?

 

[lcchan]

The long screws are unscrewed and not broken off. I have to check to see if the back plate is rotated out of position. Thanks.

 

[lcchan]

JamesW,

I was able to put the four (4) long screws back in this morning by rotating the back plate of the motor. The pump is working again.

Thanks for the help.

 

[JamesW]