Author Topic: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board  (Read 2976 times)

Offline andersenappliance

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Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« on: September 05, 2012, 12:10:35 PM »
I think they sent me a bad board.

The manual here says to refer to the tech sheet for troubleshooting the adc.

This is the PART in question.

Bad cooling defrost problems, intermittent.  The old board acting funny, the new board don't seem to want to do anything at all.

The service manual sends you to the tech sheet.  The tech sheet is not in the fridge.

(Why aren't the tech sheets included in the manuals as appendices?)

Any help is appreciated. Heading back over now.

Offline AJ

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #1 on: September 05, 2012, 12:38:27 PM »
Here is the tech sheet.
Hope it helps.


Let us know what you find.
Hope you find our website helpful.

Offline andersenappliance

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #2 on: September 05, 2012, 03:25:26 PM »
thanks!

That was quick!

I'll let you know what I find.

Offline andersenappliance

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #3 on: September 05, 2012, 10:50:16 PM »
I went through it all again, and came up with an intermittent problem with the capacitor.  This doesn't explain the defrost problem, which I fixed with the new ADC board, but it explains why the thing didn't start again with the new board.

I tested the capacitor, and got 14.5 mfd's for a 15 mfd capacitor.  Sometimes.  Sometimes nothing.  I swapped it for a 15 mfd capacitor that tested 15.7 always.

We'll order him a new one tomorrow with my regular order.

I'd think that 14.5 would do it, but not the intermittent problem.  Hearing the compressor groaning as it tries to start of the  run (only) wiring is kinda sad.

I wish I knew a lot more about boards.

That is something I need to buckle down on.

Anybody got training info for them?  Even basic "for dummies" stuff would be appreciated.

Offline dab147315

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #4 on: September 06, 2012, 06:45:10 PM »
Sears parts has a wiring diagram for your model.May want to look at it.

Offline dab147315

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #5 on: September 06, 2012, 07:06:13 PM »
I don,t think a capacitor is going to help you with a compressor starting problem.Sounds like you need a relay that comes with the capacitor.If i am understanding you forum right.Part #67005560 relay and capacitor.

Offline AJ

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #6 on: September 06, 2012, 07:10:24 PM »
Sears parts has a wiring diagram for your model.May want to look at it.

So does the tech sheet I posted above. ;)
Hope you find our website helpful.

Offline andersenappliance

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #7 on: September 06, 2012, 07:41:16 PM »
@dab147315,

thanks,

You can get the Starting Device #67005560 Or you can get just the Capacitor.

The relay checks out according to the service manual.  The capacitor did not.  I put in a used one of the same specs, and it started up fine.

I'm still relatively inexperienced with everything, but it seems that the capacitor in this set up gives temporary voltage to the start wiring, while constant goes to the run wiring.  If the thing is trying to start off of one winding only, I'd expect to hear it until the overload clicks off.  That's what I got, and swapping out the capacitors fixed that.

I'm just letting it run to see if it goes through its defrost cycle fine and that it maintains a good temp.  If not, the customer wants to condemn the machine (spare fridge), so we'll avoid the cost of the capacitor.

So far, so good.  Good temp, no frost.  If all is ok tomorrow, we'll get the capacitor, and close the ticket.

Thanks for the help, all!

Offline tgoods

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #8 on: September 06, 2012, 08:50:44 PM »
It's highly unlikely that the capacitor will cause the compressor to not start.  That's a run capacitor.  The compressor will run without the capacitor, but at a higher wattage. Next time you see a compressor with a run capacitor, disconnect it and compare amperage readings with and without the cap.

Offline andersenappliance

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Re: Tech Sheet for Maytag Ref. MSD2650HEB? re: adc board
« Reply #9 on: September 06, 2012, 09:23:18 PM »
@dab147315 & tgoods.

Ok.  That's two to one.  Happy to defer to your judgement.

But it seemed to fix itself after I swapped capacitors.  Of course, I rechecked everything, so it could have been a loose connection.

What do you think it could have been?

I'm interested to know.  After all, working for myself, while it provides on the job training, my boss ain't the best instructor!  :)


 

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