Harmon pc45-------generator

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harmondoodle

New Member
Nov 27, 2014
6
Saylorsburg pa
My stove will not run off of 8000w generator. It starts, runs great for 5 minutes, then goes into shutdown mode. Even tried running direct extension cord from generator, same results. Only thing I haven't done is ground generator. Any ideas appreciated.

Thanks, Jerry
 
It is shutting down because of the modified sine wave output of the generator as opposed to pure sign wave that comes out of the your wall outlet.

It sees the mod sine wave as "dirty" power and shuts down.
 
It is shutting down because of the modified sine wave output of the generator as opposed to pure sign wave that comes out of the your wall outlet.

It sees the mod sine wave as "dirty" power and shuts down.

I have a 7500 Watt Generac Generator with a transfer switch to power most areas of the house..
That said,
I DO NOT use the generator to run my Harman due to the dirty[ fluctuating power] coming off of it..
I am leary of burning up or ruining the circuit board in the Harman...
I Run my Oil Furnace for heat in the event of power Outtage..[Saved a million gallons of oil anyways.] ALL my hardwired rooms and such are connected to the transfer switch which is connected to the main power box.
If you do not have any other heat source, you may think about a Honda Inverter type that generates clean steady power...
I didn't buy one because they are too pricey for the lower wattage and already have a big Generator for the house and a backup heat source.
btw: I;m sure there are some here who have not had a problem using a standard Genny to run the're stoves.. I just won't chance it since I don't have to..
 
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A others have said, it will shut down using modified sine wave. It needs to be pure sine wave...Apparently the newer Harmans are doing that..Good or bad ??
 
My stove will not run off of 8000w generator. It starts, runs great for 5 minutes, then goes into shutdown mode. Even tried running direct extension cord from generator, same results. Only thing I haven't done is ground generator. Any ideas appreciated.

Thanks, Jerry

What kind of generator? Age?

If the power is dirty enough, it will likely fry the board on your Harmon if you keep trying to use it - and might fry boards in anything else that has a board that is plugged into it too.
 
A others have said, it will shut down using modified sine wave. It needs to be pure sine wave...Apparently the newer Harmans are doing that..Good or bad ??
If the newer Harmans shut down, that is a good...
A wakeup call to not use the genny and possibly damage the circuitry..
 
It is shutting down because of the modified sine wave output
It's an 8000 watt generator, with I assume some mass to the rotating components. It might not be providing clean power, but I'm pretty sure the term "modified sine wave" wouldn't apply. I could be wrong, of course. :)
 
My neighbor has a new Generac sitting down in his garage that is 8,500 watt peak. And it is a modified sine wave output. Most of them are. Except for the inverter jobbies there are very few pure sine wave generators floating around.
 
If your genny has a DC output then maybe spend $200 on a pure sine wave inverter to run your stove while also running your house of the AC .

also, how much load are you putting on the genny? Many generators (aside from inverter types) do not make clean power if underutilized. If it is putting out 2/3 to 3/4 or more of its max (running) load, it is actually cleaner than at idle. One reason why bigger is not always better.
 
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I like the put some more load on it, like a resistance heater or something, theory.
 
My P43 is running room temp, manual on my 8500 watt generator, as is the rest of our house. That said, I did modify my generator to run wfo all the time. maybe that's the difference.
Happy Thanksgiving everyone !
 
I have a 7500 Watt Generac Generator with a transfer switch to power most areas of the house..
That said,
I DO NOT use the generator to run my Harman due to the dirty[ fluctuating power] coming off of it..
I am leary of burning up or ruining the circuit board in the Harman...
I Run my Oil Furnace for heat in the event of power Outtage..[Saved a million gallons of oil anyways.] ALL my hardwired rooms and such are connected to the transfer switch which is connected to the main power box.
If you do not have any other heat source, you may think about a Honda Inverter type that generates clean steady power...
I didn't buy one because they are too pricey for the lower wattage and already have a big Generator for the house and a backup heat source.
btw: I;m sure there are some here who have not had a problem using a standard Genny to run the're stoves.. I just won't chance it since I don't have to..
Same here with my 5500w gen. Though it seems to run everything else just fine I won't try it with the stove.. For one thing the stove is on a circuit that I don't have powered through my gen. No, I just let the stove go out and the oil heat come on rather than risk a $300 board. My transfer switch is wired that way so I just run with that.
 
Same here with my 5500w gen. Though it seems to run everything else just fine I won't try it with the stove.. For one thing the stove is on a circuit that I don't have powered through my gen. No, I just let the stove go out and the oil heat come on rather than risk a $300 board. My transfer switch is wired that way so I just run with that.
I can run the hardwired room my stove is in but like you,
I prefer not to..
 
I can run the hardwired room my stove is in but like you,
I prefer not to..
i keep threatening to swap out my transfer switch for one with more circuits. It only has 6 because we needed it in a hurry and that's what was available. The gen would have no trouble with 10 since the added circuits would all be low draw. The heavy stuff is already on board and that barely runs the meters up. But hey we have some lights, all the fridges, the freezer, work stations in two kitchens and heat and hot water. So how much does one really need beyond that ? We left the second floor dark. Well maybe some day.
 
i keep threatening to swap out my transfer switch for one with more circuits. It only has 6 because we needed it in a hurry and that's what was available. The gen would have no trouble with 10 since the added circuits would all be low draw. The heavy stuff is already on board and that barely runs the meters up. But hey we have some lights, all the fridges, the freezer, work stations in two kitchens and heat and hot water. So how much does one really need beyond that ? We left the second floor dark. Well maybe some day.
I have a 10 circuit transfer switch..
all the breakers on it are interchangeable which was good for us because it came with many 15 ampers and I am using mostly 20amp circuits so it was easy to swap them.
btw: my whole 2nd floor is energized due to the 10 breaker model.
didn't hook up anything that was big like electric stove, washer, dryer but did hook up our 24k AC Wall unit.
 
We needed a gerator
I have a 10 circuit transfer switch..
all the breakers on it are interchangeable which was good for us because it came with many 15 ampers and I am using mostly 20amp circuits so it was easy to swap them.
btw: my whole 2nd floor is energized due to the 10 breaker model.
didn't hook up anything that was big like electric stove, washer, dryer but did hook up our 24k AC Wall unit.
We needed the gen fairly quickly because at the time my elderly ( 90) father in law was in our apartment we rent out. My wife had full care of him and he had to have heat which is provided by the main houses oil boiler. The only transfer switch available locally was a six circuit. I wish I had at least 8 but 10 would be perfect. So we run heat and hot water, two refrigerators and a chest freezer. Two kitchen work stations. A couple of light circuits on our side and one over there. Downstairs bath with outlet. So that gets us most anything we really need and we use oil lamps otherwise. The ranges are gas. So we can cook, take a bath or shower, shave, use the bathroom, nothing thaws out and we all have heat. Life is good in a power outage !
 
We needed a gerator

We needed the gen fairly quickly because at the time my elderly ( 90) father in law was in our apartment we rent out. My wife had full care of him and he had to have heat which is provided by the main houses oil boiler. The only transfer switch available locally was a six circuit. I wish I had at least 8 but 10 would be perfect. So we run heat and hot water, two refrigerators and a chest freezer. Two kitchen work stations. A couple of light circuits on our side and one over there. Downstairs bath with outlet. So that gets us most anything we really need and we use oil lamps otherwise. The ranges are gas. So we can cook, take a bath or shower, shave, use the bathroom, nothing thaws out and we all have heat. Life is good in a power outage !
yes it is...
we use our microwave or I cook on the grill since I didn't want to tie up a 30amp breaker on electric stove.. I actually pulled the 30 amp breaker and put 2 15's in it;s place which gave us energized 2nd floor..
my wife will run the vacuum cleaner during a power outtage and call her sister so she can hear it... she has been after her and her husband to get a genny..
 
yes it is...
we use our microwave or I cook on the grill since I didn't want to tie up a 30amp breaker on electric stove.. I actually pulled the 30 amp breaker and put 2 15's in it;s place which gave us energized 2nd floor..
my wife will run the vacuum cleaner during a power outtage and call her sister so she can hear it... she has been after her and her husband to get a genny..
And me after my oldest daughter. Last year their house was out for over a week, they had to move out when it got down to 36 deg inside. But ya know when you're trying to get kids through college etc it's tough to justify something that sits 98% of the time and isn't all that cheap to get into. And it's an engine to maintain etc etc..
 
I haven't used my big portable gen to run the stove but the problem might be more of a frequency issue than "dirty power". As long as the gen has AVR it should run stove fine. Others here use big portables no problem. If the gen has a governor adjust get a kilowatt meter and adjust output to close to ~60 cycle with a moderate 1500 W load. Running Sensitive electronics on a big (non-inverter) gen could be more about 60 cycle output than a square wave. Worth a try.....,,

I use my EU2000i for the PS.
 
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I haven't used my big portable gen to run the stove but the problem might be more of a frequency issue than "dirty power". As long as the gen has AVR it should run stove fine. Others here use big portables no problem. If the gen has a governor adjust get a kilowatt meter and adjust output to close to ~60 cycle with a moderate 1500 W load. Running Sensitive electronics on a big (non-inverter) gen could be more about 60 cycle output than a square wave. Worth a try.....,,

I use my EU2000i for the PS.
That is a factor yes. But I still don't trust it and my gen is very stable running and surges don't flux the output hardly at all. electronic voltage regulators work wonders. This leads me to another thought, if the gens own electronics works on the gen why not a harman board ?
 
Harmon Is that a Chinese nock off ? I plugged my Harman p35i into my generator and had no issues ..

I dunno - I just duplicated the OPs spelling. Maybe ask him?
 
It is shutting down because of the modified sine wave output of the generator as opposed to pure sign wave that comes out of the your wall outlet.

It sees the mod sine wave as "dirty" power and shuts down.
I have a 7500 Watt Generac Generator with a transfer switch to power most areas of the house..
That said,
I DO NOT use the generator to run my Harman due to the dirty[ fluctuating power] coming off of it..
I am leary of burning up or ruining the circuit board in the Harman...
I Run my Oil Furnace for heat in the event of power Outtage..[Saved a million gallons of oil anyways.] ALL my hardwired rooms and such are connected to the transfer switch which is connected to the main power box.
If you do not have any other heat source, you may think about a Honda Inverter type that generates clean steady power...
I didn't buy one because they are too pricey for the lower wattage and already have a big Generator for the house and a backup heat source.
btw: I;m sure there are some here who have not had a problem using a standard Genny to run the're stoves.. I just won't chance it since I don't have to..
 
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