Thread: Help with electrical issue Jet JPT310

It's a resistor that appears to be in series with the capacitor and was overloaded by too much current. The only way to tell its value, as the label is burnt off, is to refer to the original circuit diagram or try to measure it as it may still be intact with only the connection wire on the end dropped off.

It may have dropped its lead and the burning is a result of arcing, not likely but a possibility.

I feel that fitting a resistor to limit the current strange as using a smaller value capacitor would achieve the same result.

If that is the start capacitor then the starting circuit might be faulty and has left the start winding permanently energised and/or overloaded.

Either way I think that the best option is return to supplier for repair.

The lines appear to be the grooves cut in the resistve film not the color code of the device, excessive heat destroys the color codes anyway.
You would need a circuit diagram or access to a working machine to determine the value, if you were to draw out the circuit withe the remaining components it may be possible to take an educated guess of a starting value as it may just be a bleed resistor on the capacitor.

Sorry cant be of more help

The more i look at it the more I think it is just a bleed resistor in parallel with the capacitor, if it is it may have been like that for a long time and would not affect operation of the unit.
An open circuit bleed resistor would also not cause the issues you currently have.

I agree that it appears to be a bleed resistor in parallel with the capacitor and as such should not give you the symptoms that you have experienced. A bleed resistor can be temporarily removed without affecting the operation of the motor.

Most specs say “10-20kohms at 0.5W” while others say 2W. I also can’t see it being the cause unless it somehow shorted out on the lid? Motor should still run without it.

Thanks guys. So it sounds like either i've got bigger issues and that even replacing the burned out resistor won't help.

I really hope that Carbatec can just express ship out a replacement motor or that I can drive mine in and swap it over. Really don't want the machine to be out of action for more than a couple of days.

Cheers, Dom

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Just a follow up to this. I rang Carbatec. They were great about it and ordered a new motor. About 8 business days later a guy came out and we replaced the motor and I'm back in action. I honestly was not expecting them to sort it out with so little fuss and to send someone out to me (assumed I'd have to do the running around). Top marks Carbatec. Very impresssed.

Cheers, Dom

Good to see that customer service is still alive and kicking. Well done