Yamaha EF2400iS Generator - Page 3 - Fiberglass RV


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Old 09-12-2008, 09:53 AM   #29
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As others mentioned, I would take the trailer out of the equation and start testing the generator on other loads, like portable heaters, home microwaves, computers, etc., basically anything in combination that will tax the generator.

If it won't run a microwave, there's something seriously wrong with it.
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Old 09-12-2008, 12:49 PM   #30
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OK, this is interesting and frustrating. We are doing just basic testing of the generator with our trailer and its equipment.

We are at about 3000' in the High Sierras, CA. Just below Yosemite. We decided to just start trying item by item to see what would run and what would not. Much the same as we did in Colorado.

First we ran the little electric plug in heater - NO Problem

Second the 750 watt Microwave (full power for one minute) - NO Problem

Third the 11,000 BTU Air Conditioner, on low - NO Problem, WHAT? NO PROBLEM?
Kick it up to High... NO PROBLEM, Runs easily. NO WAY, WHAT IS GOING ON?

Leave the A/C on and turn on the Microwave - Generator circuit breaker trips.

------------------------------------

So what have I learned. It runs fine at 3000' elevation but does not run at 9300' elevation where the smaller Honda does run OK.
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Old 09-12-2008, 02:20 PM   #31
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Interesting the way it won't work at 9000 ft........ Are you running on regular gasoline??_____ or are you using propane?______ If propane maybe it doesn't work at that altitude?....I'm really not sure...just guessing.
Enjoy yourself up there
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Old 09-12-2008, 02:22 PM   #32
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To bad you do not have a way to tell what the RPM is at each level. A TACHOMETER would tell you if the engine is running at the correct RPM.

Could it B that the engine runs slower at higher altitude or does not ramp up to take care of the surge at the higher altitude?
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Old 09-12-2008, 02:28 PM   #33
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Mike
Interesting the way it won't work at 9000 ft........ Are you running on regular gasoline??_____ or are you using propane?______ If propane maybe it doesn't work at that altitude?....I'm really not sure...just guessing.
Enjoy yourself up there
Joe
I was using regular gasoline. I wonder if Premium would have helped.
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Old 09-12-2008, 02:31 PM   #34
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To bad you do not have a way to tell what the RPM is at each level. A TACHOMETER would tell you if the engine is running at the correct RPM.

Could it B that the engine runs slower at higher altitude or does not ramp up to take care of the surge at the higher altitude?
I think you are hitting the problem. It sounded like it wouldn't or couldn't rev up to full speed. On the Yamaha, there is no way (I can find) to take it off econo mode. It does it on its own from the load required.
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Old 09-12-2008, 03:53 PM   #35
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So what have I learned. It runs fine at 3000' elevation but does not run at 9300' elevation where the smaller Honda does run OK.
So, you are not still having the problem after you got home?

Mike, the Honda has a high-altitude carburetor jet option which is recommended if you commonly camp at 5000' or greater. Since we live at 7300' and usually camped at 5000 to 10000 feet (back in those days) Mayberry's changed out the h-a jet for the cost of the part $10, then sent along the normal jet for if we had any problems at sea level. We have used the gen in southern California and no problem pulling the a/c or the micro even without retrofitting to the normal jet. Of course I'll never really know if our Honda would have worked here at 7300' without the h-a jet, 'cause it was never outfitted that way since Mayberry's shipped it to me.

I would guess that your Yamaha would have a similar option of plugging in a high-altitude carb jet for when you come to Colorado.

All that being said, we did have a problem camping in New Mexico in August. Using the gen for the first time in perhaps a year, it wouldn't run our a/c, and only reluctantly would run Joyce's oxygen accumulator overnight, with the eco-throttle turned off. Knew it was not the usual owner maintenance, because it had a new plug, new oil, both filters cleaned, etc. Took it to good local equipment shop (not the local Honda dealer, where dropping it off to them would have cost $75 b.t.w.)----water in the gasoline. Now runs like the gem it always was.

You might blame water in your Colorado gasoline---in southwestern Colorado it ALL comes from the same refinery in New Mexico! It only differs in what the driver spits in the Shell or Exxon or ? tanker before he leaves the plant.

Good luck.
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Old 09-12-2008, 07:37 PM   #36
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Thanks George. Good info to consider.
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Old 09-13-2008, 10:57 AM   #37
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Yes, it is very reasonable to expect the Yamaha 2400 to handle the same load as the Honda 2000. It should handle more according to the spec sheet and the independent tests that I have read.

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The phrase is "Power Factor".

We know that watts = amps times volts. We know that AC is sinusoidal. Amps are sinusoidal and voltage is sinusoidal. To get the rated watts the volts and amps must peak at the same time. However, frequently they don't phase together. The amount they are different is the phase angle and the sine (or cosine, I don't remember which) of the angle is a factor that reduces the available wattage.
Steve,

Yes, Power Factor is the reason one needs to buy a larger generator than the simple calculation of volts times amps would indicate.

[b]Watts = EI times [b]cosine of phase angle

[b]VARs (Volt Amperes Reactive) = EI times [b]sine of phase angle

On some appliances the spec VA=xxx is written instead of watts. This is because VA does not equal watts.

[b]In this case, the inductive and capacitive reactance of the trailer load does not change with the Honda vs. the Yamaha power source. If the Honda works, so should the Yamaha. But it may explain why the service department says the Yamaha meets specifications when it clearly does not perform satisfactory. [b]My guess is; the service department test the generator with a purely resistive load and this generator is having a problem with an inductive reactance load.

Dean
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Old 09-14-2008, 11:29 PM   #38
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I camped this weekend with an electrician. He brought out his $600 surge protector which test each line, amps, (i donít know what all). We tried to test the generator, but it showed an open ground. Every Inverter generator Iíve had has an open ground.

So we tested the appliances one by one in the RV. My RV showed 3 amps with only the converter running when we plugged it in then dropped to 2 amps within a short time.

The refrigerator didnít show any draw. Carl said it doesnít show anything below 1 amp. Also, my CPAP didnít show anything. The microwave showed 16 amps [at] 121 volts. The A/C showed 9 amps [at] 121 volts (missed the surge).

His feelings were that the altitude was causing the generator to run rich. It probably needed different jets or something for that altitude. (this kinda makes sense to me)
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Old 09-14-2008, 11:43 PM   #39
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I camped this weekend with an electrician. He brought out his $600 surge protector which test each line, amps, (i donít know what all). We tried to test the generator, but it showed an open ground. Every Inverter generator Iíve had has an open ground.
I believe you may find that the Canadian version of the Honda/Yamaha inverter generators have a different grounding system, which is why one can't successfully parallel two of those generators. Apparently the Canadian codes have all generators in one class, whereas the US codes differ above and below certain sizes.

Higher octane won't make a difference at altitude because the lower ambient air pressure means the compression ratio is lower and less octane is needed than at lower altitudes.

The altitude will cause the mixture to run richer which is why motors, LP burners, etc., have substitute orifices for different altitudes. It may be that your particular engine is already running rich and more altitude is causing it to run too rich.
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Old 09-15-2008, 01:00 AM   #40
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I've run my Honda 2000 from sea level to 8700 ft no problems. I run a house window AC. I don't know what the draw is watts wise all I know is it works!

Very interesting Mike. I'm sorry you are having a hard time with your new generator.
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Old 09-15-2008, 01:23 AM   #41
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When I had my Honda it too ran well at high altitudes. Maggie and Wesí Honda also ran well up there at 9300í.
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Old 09-16-2008, 01:31 PM   #42
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HELP. So I hope someone here can answer this question.

When I had my Honda EU2000i in my Casita, my Kipor 3500 on my houseboat and this Yamaha EF2400iS, ALL inverter type generators; they all show an Open Ground ERROR when you check the circuitry. With an Open Ground ERROR, it is my understanding that GFI plugs wonít work. My friends Surge Protector would not work with the Open Ground ERROR.

How do you correct the problem of an Open Ground ERROR on one of these Inverter Generators?

These generators are on rubber feet. The trailer is on rubber tires. The trailer uses the frame for the 12 volt ground.

Is there a solution for these Open Ground ERRORS with an Inverter Generator?
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