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Old 11-07-2015, 07:25 PM   #1
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1988 29' Excella
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MagneTek tu-750-6

I am replacing the old MagneTek with a PowerMax EMS-HW30C. There are three connections on the PowerMax. One for ground, neutral, and hot. However the old converter had an extra black wire of small diameter. I have no idea where it goes to; thus no idea where or whether to connect it to the new converter. Appreciate any input. I have a picture of the wire connected to the unit, but I am not sure how to add to the post.
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Old 11-07-2015, 08:25 PM   #2
cwf
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Look below the typing area for "Additional options".. "Attach files"... Select that the. Select the file of choice ... Then select "upload".. Once the upload completes, close the window.. Complete text entry the. Submit the entry.
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Old 11-08-2015, 09:57 AM   #3
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Added Photo

Thanks for instruction on adding the pic. Hopefully this works and someone has made the same conversion and can give some guidance.
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Old 11-08-2015, 10:06 AM   #4
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To recap.... The new converter named above has a connection for the hot, ground, and neutral. As you can see the old converter named above has an additional small diameter black wire running in next to the large diameter white wire (ground). I am not sure of the purpose of the small diameter black wire.
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Old 11-08-2015, 11:46 AM   #5
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Small black wire for 'Shore Power On' indicator?

Your small wire may go to your trailer's control panel.

I am not familiar with the converter you are replacing, but the old OEM Univolt in our 1973 Sovereign had such a wire, which ran to the control panel where it lit up the 'shore power on' light.

To help identify the function of your mystery wire, check the voltage on it when the converter is plugged into shore power. If you see the DC output voltage on this wire, a good bet is that this wire went to your monitor or control center.

When I replaced the Univolt there was no connection for the 'power on' light on the new converter. I missed that little night light up there--a 'status ok' assurance when things got dark.
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Old 11-08-2015, 08:42 PM   #6
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Thanks

I appreciate the help loading pics and problem solving on the install of the new converter. All is working fine!
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