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Re: How to disconnect my Norcold refrigerator from A/C 120v [message #317243 is a reply to message #317219]

Tue, 09 May 2017 05:59

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma:

Senior Member

I'm assuming your Norcold fridge is the OEM fridge with the cylindrical swing motor on the back. The fridge itself actually ran on approx 24VAC. There was a power supply unit under the fridge which had a transformer with multiple windings. It stepped 120VAC down to 24VAC and when running running on 12VDC, it stepped 12v up to 24v by using an inverter circuit through it.

In DC mode the circuit applied a crude square wave to the transformer, which does not pass through very well. It doesn't run a swing motor very well either. I designed my own 24VAC sine wave inverter circuit as my inverter was toast. It ran well for a number of years until the swing motor was finally wore out.

You may be better to consider running the fridge off an inverter into its 120V input. The swing motor and transformer will run cooler and quieter.

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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[Message index]

		How to disconnect my Norcold refrigerator from A/C 120v By: DavidJForjan on Mon, 08 May 2017 16:20
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: pzerkel on Mon, 08 May 2017 16:35
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: A Hamilto on Mon, 08 May 2017 16:45
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: DavidJForjan on Thu, 18 May 2017 15:57
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: A Hamilto on Thu, 18 May 2017 16:14
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: Ken Burton on Tue, 09 May 2017 03:03
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: RF_Burns on Tue, 09 May 2017 05:59
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: A Hamilto on Tue, 09 May 2017 08:25
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: A Hamilto on Tue, 09 May 2017 11:22
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: DavidJForjan on Thu, 11 May 2017 11:39
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: Ken Burton on Thu, 11 May 2017 14:07
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: A Hamilto on Thu, 11 May 2017 14:41
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: Matt Colie on Thu, 11 May 2017 18:09
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: A Hamilto on Thu, 11 May 2017 19:14
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: Matt Colie on Fri, 12 May 2017 09:20
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: A Hamilto on Fri, 12 May 2017 12:15
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: DavidJForjan on Fri, 12 May 2017 13:27
		Re: How to disconnect my Norcold refrigerator from A/C 120v By: DavidJForjan on Thu, 18 May 2017 20:53

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