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Old 07-04-2013, 07:31 PM   #1
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EMS-30 Surge Guard Failure

A little bump in the road today.....
Had our TT plugged in and fridge running to prepare for an up coming camp outing. This afternoon I thought I would check on the fridge in the TT. I found there was no 120 volt in the TT, and as luck would have it, I didn’t have the propane bottles turned on. The fridge had tried to switch to run on propane, but of course couldn’t. I lost a few food items which were in the freezer and had almost fully thawed. After some trouble shooting, I determined my 3 month old hardwired EMS had failed and had cut off the 120 volts to the TT. I am disappointed that the EMS had failed. I will call Progressive Industries in the morning when they open up, to see what solutions they might have for me.

A bit more info; if I unplug the TT, then plug in again, the EMS will run fine for 4 or 5 minutes, then fail. I repeated this sequence a half-dozen times, same result. The supply voltage here is 120 volts, 60 Hz....quite normal. No thunder storm events here.
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Old 07-04-2013, 08:28 PM   #2
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Does your EMS have a by-pass switch? If yes have tried to see if allows current to pass through? My Progressive EMS has a the by-pass switch
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Old 07-04-2013, 08:51 PM   #3
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I believe it does have a bypass, but I will deal with that in the morning. We have 4 more days before we're due to head out camping. Thanks for that suggestion.
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Old 07-05-2013, 09:17 AM   #4
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This morning, called their 7-day a week tech support and left a message. They will get back to me. One thing I like about the EMS is the tech support, and the fact the unit can be worked upon and repaired.

This morning, temperatures are a cooler 75 F. Yesterday was quite warm with temps in the 90 F range. I had left the EMS unplugged over night, and its been running fine for over an hour this morning. Has me wondering if the warm temperatures had caused the contactor to be unable to stay energized and closed for any length of time. Never did get any error messages from the controller board. Hmmmm..... have to see what tech support says.
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Old 07-05-2013, 11:59 AM   #5
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Well, more than 3 hours now, and still working. Just now, I installed 1/4 inch spacers between the bottom of the EMS and the plywood board it’s attached to. I’m going on the assumption the contactor was over heating because the bottom was tight against the plywood. There is no mention in the installation manual about any need for spacers. Rustic Eagle, if you’re reading this, in your thread about your EMS you wondered if spacers were needed, could be they are. Not yet any word from tech support, maybe later today.
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Old 07-05-2013, 12:50 PM   #6
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Just got the call from tech support. They said the circuit board needs to be replaced, and will send me one under warranty. Have to say, I like their service.
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Old 07-05-2013, 05:25 PM   #7
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Glad to hear Progessive Industries are working with you. Happy Camping
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