Motor does not start on high speed, only through low speed

[alex6999]

Hi, my motor does not start on high speed, I need to start it on low speed, than switch to high speed.

The main problem electricity not stable, and often disconnected for couple second. Motor stops and does not start again.

It thermally protected, so it activated after 2 second. And deactivated after 30-100 second.

So motor warm, thermally protection clicking and nothing.

Looks like I have
A.O. Smith B982
1-1.6 HP

 

[alex6999]

Actually just now motor stops. I checked computer logs, it does not reboot, so I think motor stopped because it was overheated.

Lines clear, filters backwashed today. Pressure on bypass 10 and 12 through clean filter.
Manometer no good and showing 2 at no pressure.

Ambient temp close to 100 today.

 

[alex6999]

I found motor need new capacitor
And because of overheat my motor motor coil May be burnt little bit. So my motor will not work long time.

Capacitor in motor rated 90° C
May I install cheap capacitor from ebay, rated 65°?


This capacitor rated 85° but have 3 wires, can I use it?
TEMCo 30/5 MFD uF Dual Run Capacitor 370 440 vac Volts AC Motor HVAC 30+5 799491873599 | eBay

Industrial grade amrad cost $13 on ebay.

 

[alex6999]

Bought new capacitor. Same capacitor, rated 90 cesium
And it too big, does not fit motor body.

motor start on high speed with new capacitor

Old and new

 

[JamesW]

Go to a local motor shop to get a capacitor that will fit.

 

[alex6999]

Bought new capacitor last autumn and installed it, motor now start on high speed, run 5 seconds and goes to thermal protection.

Wrong again?
It's rated 125VAC, but motor 240V
is it the problem?


OK, found another another one
will it work?

Cbb60 AC 450v 50/60hz 30uf 8mm Thread Polypropylene Film Motor Run Capacitor NH for sale online | eBay

Find many great new & used options and get the best deals for Cbb60 AC 450v 50/60hz 30uf 8mm Thread Polypropylene Film Motor Run Capacitor NH at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Or may be this

Titan Pro TTMJ25 Motor Start Capacitor 25-30 MFD UF / 220-250 VAC | eBay

Titan Pro part number TTMJ25. 25-30 MFD UF / 220-250 VAC. Rated at 25-30 uf 165 Volts 50/60HZ. Product TypeStart Capacitor. Motor Start Capacitor. Rated 3-second start. ManufacturerTitan Pro.

www.ebay.com

 

[JamesW]

Pool Pump Run Capacitor, 30 MFD, 2444 - 5VR0303 - INYOPools.com

5VR0303 - CAPACITOR, RUN 370V 30 MFD (5VR0303) - 2444

www.inyopools.com

 

[RonsPlc]

I am a bit concerned with your pump over heating. Once a pump is running, the capacitor is no longer in play.
You mentioned that your electricity to the pump is "not stable", which could have damaged your pump.
This is the reason that we don't recommend putting a pump on an extension cord.
I would start by getting an electrician to check the wiring going to the pump.
If it is too old/unstable the result inside the pump is HEAT... enough heat to melt some of the winding insulation in the motor itself.
Once the electrician is satisfied that you don't have a wiring problem, you may need to get a new pump.

 

[JamesW]

They have a "Run" capacitor, not a "Start" capacitor.

A "Run" capacitor stays in the circuit during operation.

If they had the wrong capacitor, the motor will not work correctly.

They need to try it with the correct capacitor.

 

[alex6999]

Inyopool capacitor too expensive, $30 with shipping.

Understood, start capacitors used with motors with start button. And 2 capacitors there

It's run capacitor and 125 not volts, it's VA, it's watts * or / cos phi