New pool pump motor overheating

[davidluiz]

Hi All,

Bought a brand new 3/4 hp hayward pool sweep pump from ebay. Well guess what. The pump runs but the motor housing gets so hot you can't touch it. Motor's pulling around 9.5A on 220V which seems too high. Any ideas what might be wrong with the "new in box" pump deal from ebay? I'm going to try to call hayward tech support on Monday and see if I can get a warranty replacement. Seems odd though that a new motor would have problems. Here's what I've checked so far:

1. Measured 240 volts right at motor terminals.
2. Centrifical starting switch seems to be opening when motor comes up to speed.
3. Motor makes a grrring noise and has a slight vibration.
4. Double checked the wiring.
5. Current is ~9.5A.

Over temp switch doesn't shut off though. Although I haven't run it more than 30mins in fear of something melting down. Here are my guesses of what might be wrong:

1. Shorted or open field winding?
2. Rotor defective?
3. Starting cap defective? (seems to start fine though and come up to speed)

Anybody have ideas on what might be wrong? Isn't 4 to 5 amps about right for a 3/4 hp motor running on 220V?

Thanks in advance

Dave

 

[Paul Franklin]

Hi All,

Bought a brand new 3/4 hp hayward pool sweep pump from ebay. Well guess what. The pump runs but the motor housing gets so hot you can't touch it. Motor's pulling around 9.5A on 220V which seems too high. Any ideas what might be wrong with the "new in box" pump deal from ebay? I'm going to try to call hayward tech support on Monday and see if I can get a warranty replacement. Seems odd though that a new motor would have problems. Here's what I've checked so far:

1. Measured 240 volts right at motor terminals.
2. Centrifical starting switch seems to be opening when motor comes up to speed.
3. Motor makes a grrring noise and has a slight vibration.
4. Double checked the wiring.
5. Current is ~9.5A.

Over temp switch doesn't shut off though. Although I haven't run it more than 30mins in fear of something melting down. Here are my guesses of what might be wrong:

1. Shorted or open field winding?
2. Rotor defective?
3. Starting cap defective? (seems to start fine though and come up to speed)

Anybody have ideas on what might be wrong? Isn't 4 to 5 amps about right for a 3/4 hp motor running on 220V?

Thanks in advance

Dave

Are you sure there are no restrictions? Does the flow seem right? Might you have a plugged screen or filter? It sounds like there is too much back pressure. You're right, current is too high for 3/4 horse.

One more thought...are you sure it's wired for 220? often they are dual voltage.

HTH,

Paul

 

[Deke]

Hi All,

Bought a brand new 3/4 hp hayward pool sweep pump from ebay. Well guess what. The pump runs but the motor housing gets so hot you can't touch it. Motor's pulling around 9.5A on 220V which seems too high. Any ideas what might be wrong with the "new in box" pump deal from ebay? I'm going to try to call hayward tech support on Monday and see if I can get a warranty replacement. Seems odd though that a new motor would have problems. Here's what I've checked so far:

1. Measured 240 volts right at motor terminals.
2. Centrifical starting switch seems to be opening when motor comes up to speed.
3. Motor makes a grrring noise and has a slight vibration.
4. Double checked the wiring.
5. Current is ~9.5A.

Over temp switch doesn't shut off though. Although I haven't run it more than 30mins in fear of something melting down. Here are my guesses of what might be wrong:

1. Shorted or open field winding?
2. Rotor defective?
3. Starting cap defective? (seems to start fine though and come up to speed)

Anybody have ideas on what might be wrong? Isn't 4 to 5 amps about right for a 3/4 hp motor running on 220V?

Thanks in advance

Dave

You are running 240 volts on a 110 volt motor.

 

[davidluiz]

Are you sure there are no restrictions? Does the flow seem right? Might you have a plugged screen or filter? It sounds like there is too much back pressure. You're right, current is too high for 3/4 horse.

One more thought...are you sure it's wired for 220? often they are dual voltage.

HTH,

Paul- Hide quoted text -

- Show quoted text -

Back pressure was something I questioned as well but even running with the pump discharge port open to the air, get the same results. Also, when connected up to the pool cleaner line, which has a valve in it, I closed the valve and the current when down about .5 amps.

I checked and double checked the wiring an it's wired according to the name plate.