Need Manual Troubleshooting Norcold SCQT-6406 works AC volt not DC volts ?

[chuck711]

Need Manual....Troubleshooting Norcold SCQT-6406 works AC volts not DC volts ? When hooked up to shore power my Norcold works fine However on the batteries which are topped off nothing............Any thoughts or suggestions?No manual on this unit ........where could I get one?

[GordMay]

Marine Refrigeration expert Richard Kollmann < http://kollmann-marine.com > gives specific answers to specific questions, on his Technical Forum: http://www.kollmann-marine.com/phpBB/

Norcold is a division of:
Dometic Environmental Corporation
P.O. Box 15299, Richmond, VA USA 23227
Phone: 804-746-1313
Fax: 804-746-7248
Web: http://dometicenviro.com/marinerefri...roductsmr.html
Refrigerators: http://dometicenviro.com/marinerefrigerator/frige.html
Freezers: http://dometicenviro.com/marinerefrigerator/freeze.html

[chuck711]

Gord May
Thanks for the response. I'll get crackin and check out these places.
Thanks again

[Sunspot Baby]

I had a similar problem on a different make of fridge. The compressor was actually a 12 or 24v unit with a converter to take 110 to 12. When I bypassed the converter and took 12v straight to the compressor it worked fine. The problem was in the converter, voltage was getting through but not enough amps to run the fridge. It was the 2nd converter or the unit because I had a similar problem with the first. The 2nd failed in Bahamas, so I now just run it as 12 volt and it works great. When on shore power, the battery charger keeps up fine.

FWIW I have a freezer with the same converter that has worked trouble free for 2 years.

Assuming yours is similar, try bypassing the voltage converter and see if it runs OK.

George

[Dziadek Jacek]

Originally Posted by chuck711

Need Manual....Troubleshooting Norcold SCQT-6406 works AC volts not DC volts ? When hooked up to shore power my Norcold works fine However on the batteries which are topped off nothing............Any thoughts or suggestions?No manual on this unit ........where could I get one?

no manual but experiance, sorry, It works on AC because it is only transformed to about 40VAC to move the compresor pump,12vdc must be converted to 40VAC and it need complicated electronic circut where many elements can fail, sometime it is only corrosion easly seen on the circut board.

[senormechanico]

Recently,I got a 12 volt/120 volt fridge for free.
Same problem, the 12 volt didn't work. A couple of power transistors later, it worked fine. Did I mention, I fixed it myself with no soldering? They were mounted on a small circuit board with a couple of screws in each one.

Steve (retired electronics tech) B.

[Don1500]

I know this is an old thread but I think this would be of help to others.

The manual for the Norcold SCQT-6406 can be obtained here:

http://bryantrv.com/docs2/docs/ncolddedc.pdf