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Help Fixing my Dishwasher to drain - Part 2 (media.piefed.ca)
submitted 2 months ago by to c/diy@slrpnk.net
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Part of trying the get my dishwasher to drain https://piefed.ca/c/diy@slrpnk.net/p/894317/help-fixing-my-dishwasher-it-won-t-drain-and-is-stop-on-sanitize-mode

I have removed to drain pump, solenoid, water heater.

The drain pump white part spins with no obstruction at all.

With a multimeter:

My solenoid is about to get 984 OHMs resistance.

I'm not sure how to check my drain pump. I don't see any connector end. Closest thing are these 6 metal spike thing pointed out on the motherboard.

I don't see any visible blockage.

I'm not sure if I need to check the voltage as well. And I'm not sure if i need the dishwasher running with water to test. Problem is still stuff is located at the bottom of the dishwasher. If I wanted to check the voltage with running water.

Help Fixing my Dishwasher - Part 2
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[–] [S] 4 points 2 months ago (1 child)

I'm not quiet sure how I would go about testing like that. And I never heard of working on a hot circuit.

I understand I could time the dishwasher and use that to help find what cycle it stops at.

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  • [–] 2 points 2 months ago

    AFAIK you would need a VFD or a custom built driver circuit to generate the frequency you need to operate it at which is the hard part.

    Honestly though if it's an permanent magnet synchronous AC motor (highly likely) you should be able to test it provided you had a Variac to lower mains voltage (or transformer with taps works too) although you would need to bring the input voltage waaay down.

    Permanent magnet synchronous motors have a ratio of V/Hz you need to maintain, in this case we have 0.256 V/Hz.

    To test at 60Hz the max I would start at would be 15.34V AC at 60Hz. Otherwise you draw too much current and risk cooking it.

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