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2 Speed 1.5 HP motor/pump used with Pool. Motor works in low speed but trips the circuit in high speed (trips GFCI outlet). ???

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  • stanswiess Sep 28, 2009

    Used on the same circuit throughout. Is it economical/worth repairing a $200 - $300 pump?

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Has it always been used on that circuit? if so that is a sign of the armature inside the motor going bad. when i motor starts to pull more amperage it means there are bad spots to create a additional draw of electricity. so i would have to say it needs repair.

but if that is a circuit you never used it on. i would check what the rated amps for that circuit are and compare with the motors rating!

also the speed switch may be bad! do you know how to test with a meter?

Posted on Sep 27, 2009

  • michael schultz
    michael schultz Sep 28, 2009

    just wondering if everything is
    okay? let me know if i can help any more and please remember to accept
    and rate our chat! thank you



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I have a 2 speed pool pump. The breaker kept tripping so I tried to troubleshoot the problem. I am an electrician by trade but unfortunately have never had or dealt with pools. I took the pump into a pool...


Coming into the back of the motor...
4 wires? Right?
Red, Black, White, and Green
A 2 speed will be 4 wires - additional Red wire
A 1 speed will 3 wires - no Red

The black and red wires are your speed wires,
they will go on to your 'line' connections...labeled on the motor next to the spade connection as 'H' and 'L'

the white wire is your common or neutral wire,
it will go on the space connection with a 'C' next to it.

and the green wire naturally is ground. Normally attached directly to the base of the motor.

I cannot tell you specifically which wire is low-speed or which wire is high-speed. Because different spa control manufacturer's alternate or vary the use of colors for low/high speed. Unfortunately it is not standard. But if I was to venture a guess, the majority of these control manufacturers, use red wire for low speed.

I have also seen at times, that the label is Misprinted. Where the common and low-speed are switched?
in my experience, and I have wired and many, many motors. Both two speed and single speed motors. The common is almost always either at the top of the spade connections, or the middle spade connection, I have never seen in my recent experience, where the common connection is at the bottom.
This in common problem, may or may not be the case for you.

to your question specifically:... Both speed wires are not on the same relay, are they? Or is it a contractor?
(normally two different relays on the circuit board for the different speeds of the pump) Unless there is a normally closed and a normally open spade connection?

is this a mechanical spa control system, or is it a digital electronic, with a circuitboard, spa control system?

Aug 08, 2013 | AO Smith A O Smith Motors Century 1hp 115v...

2 Answers

Power trips out when jets are switched on


I'm going on somewhat limited information here not knowing if the tub is newly installed or if this is a spa that has been working in the past and just started doing this. It would be helpful to know if this is a recently installed pump as well. That said here are a few things to check.
If it's a new install: Your electrician has more than likely wired the spa incorrectly. Be sure that the spa pack has 220V going into the pack and that the GFCI is wired correctly.
If it's an old spa with a new problem: A lot of times a bad heater element can cause a spa to trip the breaker. If you have a bad element the spa will operate normally for about a minute when you turn the power on, then trip the breaker as soon as the heater kicks in.
If it only trips the breaker when the pump is turned on to high speed, more than likely there is a problem with the wiring of the pump or the relay on the pump itself.

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I have a Century 1081 115v, 2 speed pump for my waterfeature. The motor runs fine in low and high spped, the pump impeller is spinning but it dies not pump water.It is a 3/4 horse. The waterfall reservoir...


I don't know the answer to this ... your pool service company can advise you. To my way of thinking, you are asking a lot of a 3/4 horse. I have a 1 1/2 horse lifting water in a two inch pipe about 4 feet to my water feature with no reservoir.

Since you have a two inch pipe, why not run a bigger motor? I have two HP on all my filtered lines which are 2" suction and 2" discharge.

Are you absolutely sure you have suction? ... and no air leaks on the suction side?

Apr 24, 2011 | Century New Magnetek Pool Spa Pump Motor...

1 Answer

Hello,I have an old jacuzzi vectra II hot tub (1988) 120 volt.the gfci on the unit trips every time the pump is on low speed with the thermostat calling for heat. there is no trip when there is no demand...


hi,

ok so when the pump is on high and the heater is running it doesent trip? you didnt say if it did. undo the heater leads so the pump is isolated completely. run the pump on the control centers gfci and see if it trips. if it does then try wiring directly - with an extension cord to a plug with a gfci in your house and see if it trips the gfci in your bathroom. if no trip inside house then bypass tubs gfci and run it with heater and pump through your bathroom gfci. if no trip then try and replace the tubs gfci, it gets pretty humid in the control center and gfci's have a semiconductor which which do fail after years of rough duty like that. if it trips the gfci in your house with the heater again it has a cracked heater element. craigslist always has old hot tubs and parts. you might have to buy a whole used old hot tub but that may be cheaper than a new heater box.

later

jm

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1 Answer

Replaced Single Speed Pool Pump Motor with 2-Speed Motor


You will need a two speed time clock to really take advantage of real energy efficiency savings. Intermatic makes one that fits in place of the original t104 time clock. You will need to run an additional wire to the pump as well. You will have the ground. Then one common wire that is always hot whether or not you are on high speed or low speed. You could make this a white wire. Then a black wire for your high speed that is energized in high speed and a red wire for the low speed. It is important that the high and low speeds not be energized at the same time, otherwise you will hear a very unpleasant sound coming from the motor, and failure and shortened life of the motor will be realized. HTH

May 29, 2010 | Hayward 2HP Pool Pump Motor A O Smith...

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Trips GFCI outlets


The motor on this unit is sealed and not accessible for repair, only replacement.

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I have a 2 speed spa motor (K48m2a4) that stopped working at low speed. going to high speed only has circulating power.


Either the low speed circuit is defective or a relay is inoperative. If you feel confident , you could switch the low and high speed leads on terminal plate. The high speed jet button would activate low speed on pump if motor is good.

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1 Answer

High speed spa pump shuts off


The motor may have a thermal cutoff if the motor draws too much current. Do you have a sufficient large gauge circuit supplying the motore? If not the actual voltage at the motor may drop, causing it to draw more current to make up for the loss of voltage, thereby tripping the motor's protective breaker. I assume the motor will start again after serveral minutes of cooling down.

Curtis

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