kmb1966
Lake Charles
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I have been working on my Norcold 1200 again and have noticed that the unit will power up and operate when only connecting the 12 volt (+) supply to the rear control board connector labeled "12V". The connector labeled GND can be disconnected totally. Obviously there refrigerator is somehow already grounded somewhere, but I am wondering if this is a problem or is normal??
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wnjj
Cornelius, Oregon
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Joined: 01/11/2007
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It’s probably grounded through the 3rd pin of the AC power cord and I’m pretty sure it is normal.
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kmb1966
Lake Charles
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wnjj wrote:It’s probably grounded through the 3rd pin of the AC power cord and I’m pretty sure it is normal.
yes, but the only thing I noticed is that it will also operate when the 120 cord is unplugged making the refrigerator go to propane mode.
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enblethen
Moses Lake, WA
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Joined: 01/05/2005
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It is possible that one of the screws holding the circuit board has a ground connection.
The 120 volt element could be going to ground
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BB_TX
McKinney, Texas
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Is the refrigerator metal frame in any way touching the trailer metal frame? Trailer frame is ground, and the fridge internal 12 v ground may also be connected to the refrigerator frame.
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vermilye
Oswego, NY, USA
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Do you have copper propane piping? One of my refrigerators ran on the hot & the propane copper pipe until the broken ground was discovered.
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Chris Bryant
Arden, North Carolina
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vermilye wrote:Do you have copper propane piping? One of my refrigerators ran on the hot & the propane copper pipe until the broken ground was discovered.
^^^^^^^ This ^^^^^^^
-- Chris Bryant
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ScottG
Bothell Wa.
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Joined: 02/25/2005
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Chris Bryant wrote:vermilye wrote:Do you have copper propane piping? One of my refrigerators ran on the hot & the propane copper pipe until the broken ground was discovered.
^^^^^^^ This ^^^^^^^
Yup, he nailed it!
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kmb1966
Lake Charles
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vermilye wrote:Do you have copper propane piping? One of my refrigerators ran on the hot & the propane copper pipe until the broken ground was discovered.
yes. that has to be how it is being grounded.
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larry cad
ohio
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Probably not a good idea to have electricity flowing through a pipe that is carrying flammable gas
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