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StephenH View Drop Down
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Joined: 29 Nov 2015
Location: Wake Forest, NC
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Posts: 6291 		Direct Link To This Post Topic: generator
    Posted: 02 Mar 2016 at 11:12am
CharlieM,  Thanks. I was not sure how it worked.
StephenH
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techntrek View Drop Down
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Joined: 29 Jul 2009
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Posts: 9059 		Direct Link To This Post Posted: 02 Mar 2016 at 6:27pm
Yes, that is true.  If both ran at the same time the circuit breaker would trip.
Doug ~ '10 171 (2009-2015) ~ 2008 Salem ~ Pod instruction manual
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marwayne View Drop Down
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Posts: 1002 		Direct Link To This Post Posted: 02 Mar 2016 at 6:34pm
When microwave is plugged in not in use the draw is 3 watts.
Convection on roast draws 1115 watts.
If you want something done right, do it yourself.
2011 RP172, 2016 Tundra 5.7 Litre, Ltd.


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brentandjudy View Drop Down
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Posts: 9 		Direct Link To This Post Posted: 02 Mar 2016 at 6:55pm
Well following on Marwaynes advise, I ran an extension straight to the microwave from the generator and no luck, except for the grill which works on grill 1, but not on 2 or 3. The convection oven works well on 375F, I did not try it at higher temperatures.
So back to square one !!
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JandL View Drop Down
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Posts: 364 		Direct Link To This Post Posted: 02 Mar 2016 at 7:10pm
My microwave starts at high power, so I would think yours does the same. You can lower it and try and see what power setting you can run it at
JandL
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CharlieM View Drop Down
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Posts: 1797 		Direct Link To This Post Posted: 02 Mar 2016 at 8:10pm
IF the micro works well when plugged into shore power, and IF the generator is up to full speed before turning on the micro, and IF the micro is plugged directly into the generator, and IF the micro is the same High Pointe we all have I'd conclude the generator is at fault. Current posts confirm a 2000W generator will have no problem with the micro. BTW, turning the micro power down will have no effect. The power setting affects only the duty cycle, not the peak power. For example, 40% means the micro runs at 100% power for 40% of the time, then it's off for the remaining 60%. The cycle period is about a minute. 
Charlie
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brentandjudy View Drop Down
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Posts: 9 		Direct Link To This Post Posted: 02 Mar 2016 at 8:57pm
Tried it down to power 2, still no joy.
Thanks,
Brent
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marwayne View Drop Down
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Posts: 1002 		Direct Link To This Post Posted: 02 Mar 2016 at 9:24pm
Here is my setup from generator to pod, you can see where both ends are plugged in.

If you want something done right, do it yourself.
2011 RP172, 2016 Tundra 5.7 Litre, Ltd.


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TheBum View Drop Down
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Joined: 26 Feb 2016
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Posts: 1407 		Direct Link To This Post Posted: 04 Mar 2016 at 12:58pm
Originally posted by brentandjudy

Tried it down to power 2, still no joy.
Thanks,
Brent


I'm not surprised. The tube in most (all?) microwaves is either on or off. The "power" setting just changes the duty cycle, i.e. how long the tube is on and the amount of time until it turns on again.
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brentandjudy View Drop Down
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Posts: 9 		Direct Link To This Post Posted: 05 Mar 2016 at 1:27pm
I just tried a couple of things.
1.  Measured the voltage inside the camper while running the convection oven.  Voltage was at 120V which indicates no line or source resistance. Implies the connection is low impedance.
2.  Ran the microwave from an alternative connection on the Generator which showed the same problem. 
3.  Measured the voltage with a DMM and tried starting the microwave a couple of times.  Noticed a significant drop in voltage down to 69V which implies High Surge or delayed surge capability.
4.  Ran a similar size Samsung 1.58kW microwave off an extension cord on the Generator and it worked perfectly.  This implies that the surge capability previously mentioned should not be the issue.

Conclusion:  The Highpointe Microwave appears to be drawing high inrush currents causing the voltage to drop to the point that the microwave resets. 

Johann, Brent's friend.
 
Brent
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