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Old 08-05-2017, 09:41 AM   #1
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Parallel generators not powering TT.

I have 27HFS that had a champion gen by and it died. I purchased these two Yamaha 2000 watt generators to run on parallel. I turned everything off in the trailer and when I warm up the generators and plug in just a fan, the fan isn't getting fully powered up.

Is there something that I'm missing? Is there a switch somewhere in the TT that needs to be toggled? I tested the generators with the parallels powering the fan on an adapter 30 amp and they are powering very well. I checked all the fuses and they are good. The TT works normal when plugged into a 30 amp outlet. Is there something wrong with the inverter?
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Old 08-05-2017, 09:50 AM   #2
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I'd bet it's a neutral bonding issue. Someone with more experience is bound to show up.
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Old 08-05-2017, 10:18 AM   #3
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The new Yamaha's use a paralleling cable arrangement between the two generators to sync them together. Are you using that cable? If so are you sure it is connected correctly?
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Old 08-05-2017, 10:24 AM   #4
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Do you have an EMS hardwired on your TT?
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Old 08-05-2017, 10:34 AM   #5
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The new Yamaha's use a paralleling cable arrangement between the two generators to sync them together. Are you using that cable? If so are you sure it is connected correctly?


Yes and I tested the parallel using a 30 amp/110 adapter on my fan and the generators work great.
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Old 08-05-2017, 10:34 AM   #6
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Do you have an EMS hardwired on your TT?


EMS?
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Old 08-05-2017, 10:36 AM   #7
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I'd bet it's a neutral bonding issue. Someone with more experience is bound to show up.


Ok thank you
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Old 08-05-2017, 10:39 AM   #8
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EMS?
Electronic Monitoring System..... if it senses and open ground on your generator it will not allow power from your Yamahas into the camper.
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Old 08-05-2017, 10:53 AM   #9
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Open ground
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Old 08-05-2017, 12:13 PM   #10
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You might need the Progressive bonding neutral - ground plug. About $15
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Old 08-05-2017, 12:16 PM   #11
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Electronic Monitoring System..... if it senses and open ground on your generator it will not allow power from your Yamahas into the camper.


Awesome, I think that's it my friend. Thank you.
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Old 08-05-2017, 12:16 PM   #12
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You might need the Progressive bonding neutral - ground plug. About $15


Ok cool thank you.
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Old 08-05-2017, 02:29 PM   #13
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Make your own, real quick and easy. Just run a jumper wire from white(neutral) to green(ground) screws on a male plug. Then just plug it into unused 120v receptacle on your gen set.
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Old 08-05-2017, 03:04 PM   #14
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Make your own, real quick and easy. Just run a jumper wire from white(neutral) to green(ground) screws on a male plug. Then just plug it into unused 120v receptacle on your gen set.


Headed to THD right now.
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Old 08-05-2017, 05:07 PM   #15
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Old 08-05-2017, 05:10 PM   #16
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http://noshockzone.org/generator-gro...utral-bonding/
This will help a lot.
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Old 08-05-2017, 05:46 PM   #17
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Didnt work. AC kicks in for about 10 sec and then power shuts off. I have no other appliances running. I even have the fridge on gas.
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Old 08-05-2017, 05:49 PM   #18
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Do you have an EMS hardwired on your TT?


Is this something that comes with the TT or is it added?
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Old 08-05-2017, 05:52 PM   #19
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Didnt work. AC kicks in for about 10 sec and then power shuts off. I have no other appliances running. I even have the fridge on gas.
I think your parallel cable is not connected all the way. Check that first.

Does the overload light kick on for the generator?

Flip all breakers off except for A.C. the inverter may be running to charge the battery. You will also want to set the stat higher than a giant temp or just turn on fan only first. Once running well then engage the ac by lowering the temp or turning on a.c..

If overloaded you may need a hard start capacitor for your AC.
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Old 08-05-2017, 07:04 PM   #20
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It is imperative that one generated is started first and establishes the second one as the slave. If not you will get an overload condition. I was told this by a Yamaha corporate repersentative. I encountered the same problems. I turned off all breakers in the fifth wheel. Started one generator. Let it warm up and go to Eco mode. Then I started the second unit. I then turned on the ac breaker. Everything worked fine after that
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