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Old 03-22-2012, 06:56 PM   #1
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No 110v from shore .... Generator 110v OK

We just brought the coach from the storage place and I hooked up to my shore power and nothing. I have a 220v properly wired that I have been using with no problem. I use a 50/30 adapter as my 220v coach cord is not long enough. The house breaker is OK. I have power all the way to the end of my power cords, checked with a meter, 115v. I checked to see if I had 110v while running the Gen again, and I did. All 110v worked.

We camped 2 weeks ago on shore power with no problems. Last week we went to the state park for the day and we used the Gen for aprox. 1 1/2 hrs with no problems. There was no shore power available.

I do not know if the transfer relay/switch is bad? Is there a fuse hiding somewhere?


Thanks for your input,
Fred

We are suspose to leave Friday night to camp .................
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Old 03-22-2012, 06:59 PM   #2
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No 110v from shore ......... gen 110v OK

We just brought the coach from the storage place and I hooked up to my shore power and nothing. I have a 220v properly wired that I have been using with no problem. I use a 50/30 adapter as my 220v coach cord is not long enough. The house breaker is OK. I have power all the way to the end of my power cords, checked with a meter, 115v. I checked to see if I had 110v while running the Gen again, and I did. All 110v worked.

We camped 2 weeks ago on shore power with no problems. Last week we went to the state park for the day and we used the Gen for aprox. 1 1/2 hrs with no problems. There was no shore power available.

I do not know if the transfer relay/switch is bad? Is there a fuse hiding somewhere?


Thanks for your input,
Fred

We are suspose to leave Friday night to camp .................
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Old 03-22-2012, 07:06 PM   #3
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Hi,

It sounds like your transfer switch is bad. Since you apparently have a meter of some sort I would un plug shore power and take the cover off of the tramsfer switch and first look for burnt wires or open wires. THen I would check the relay itself for burnt contacts.

If you feel comfortable working with electricity and know what you are looking at I would plug in the shore power and check voltage and when you loose the voltage that is the problem. If you don't know what you are doing then leave it for a licensed electrician or a RV repair shop to look at it. Electricity is something you have to respect as it could kill you.

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Old 03-22-2012, 07:18 PM   #4
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Fred 420, I bet its the transfer switch, after removing all power as stated above check the contacts. You maybe able to clean them up with emory cloth. May also try some electrical contact cleaner just spray it in and wash everything out, it drys very fast. You can get it at any auto parts store. Worth a shot before you buy anothe rswitch. Hope this helps.
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Old 03-22-2012, 07:31 PM   #5
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Quote:
Originally Posted by Fred420 View Post
We just brought the coach from the storage place and I hooked up to my shore power and nothing. I have a 220v properly wired that I have been using with no problem. I use a 50/30 adapter as my 220v coach cord is not long enough. The house breaker is OK. I have power all the way to the end of my power cords, checked with a meter, 115v. I checked to see if I had 110v while running the Gen again, and I did. All 110v worked.
In my opinion it could be but only a couple of items. I am going to assume that you do not use any 220v appliances and that 220v never has entered the coach.

If you are getting power from the generator and no power from your shore connection, the fault may lie in the transfer switch. It's the steel box where all the cords connect to inside your motorhome. There aren't any fuses that would prevent you from getting power or anything like that.

I am also hoping that the connections through the extension cord are not corroded, burnt or coated with melted rubber from one of the cord connections. It happens with 30A equipment.

I had a failed transfer switch a few years back and this is how it was not working as well. Generator OK - shore power nothing. Once the transfer switch was replaced (got whacked by lightning) all was well again. Good luck.
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Old 03-23-2012, 06:50 AM   #6
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Thanks for the replys!

I am at work now and will check out the ATS. I looked in it last night with a flashlight and there is a buss bar in the way of everything. I saw a circut board and read on the label that there was a LED light that should be lit if working? I do not see any hard relays.

Anyone have any thoughts?
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Old 03-23-2012, 07:21 AM   #7
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Did you switch the switch from storage to use.
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Old 03-23-2012, 07:30 AM   #8
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It sounds like and could very well be your transfer switch especially if it's an IOTA unit as they are subject to many failures including fires.

However, one other place to check is your inverter/converter to make sure that the circuit breakers haven't tripped. Remember that the inverter/converter has 120 VAC running through it even though it may not be doing anything at the time. It may be OK since you state that you have full power from the genset but it only takes a second to make sure.

Many people overlook the inverter/converter as a power source problem when trying to use shore power.

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Old 03-23-2012, 07:52 AM   #9
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Does the inverter/converter affect the shore power coming in? And not the Gen?
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Old 03-23-2012, 08:13 AM   #10
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I am not quite sure how it all works as I know enough about the RV electrical stuff to be very dangerous.

It could be that if the genset is transferring power correctly to the coach but the shore power cord is not, then your inverter/converter is functioning correctly, just not sure.

It's a simple thing to check whether the CB's have tripped on your inverter/converter. I believe they are simple push buttons on the outside case.

I would definitely check the transfer switch as that is likely your problem, just don't over look the simple things.

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Old 03-23-2012, 08:17 AM   #11
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If everything 110 works with the generator, there is no switch that will change that when on shore power.

If it is like any transfer switches I have seen, the control board is working to supply 110 with the generator. It sounds like the normally closed contacts are not making when on shore power. If you are getting 110 up to the transfer switch, I don't see what else it could be. If you don't have any emery paper, the striker on a match book will work to clean up the transfer switch relay contacts.



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Old 03-23-2012, 08:18 AM   #12
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Does the inverter/converter affect the shore power coming in? And not the Gen? Someone mentioned this as a possible problem.

Donlock ......... what switch? The only ones that I turn are the battery disconnects.
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Old 03-23-2012, 08:30 AM   #13
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My buddy does have an older MH(1992) that doesn't have a transfer switch and he has to flip a couple breakers to go from shore to generator, but this is a 2006 MH.



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Old 03-23-2012, 08:48 AM   #14
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Fred420 please expalin your statement on using 220 volt shore power to your MH????? MH's DO NOT USE 220 volts hopefully it is just a play on words. IF you connected your MH to a 220 volt plug then you have blown something in the MH. MHs use 110 volt single leg 30 amp service or 110 volt dual leg 50 amp service.
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