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Valsi Generator 7500W no output voltage

I have a Valsi 7500W generator which is not putting out any voltage. Can you still get anyone to work on these or get parts and manuals. I have been unable to find anyone with parts on the internet.

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If its a Generac could be the voltage regulator or control board. If you want to go inside then disconnect the avr (voltage regulator) from the field and put 12 volts to the field slip rings with a car battery. Watch Polarity.... Yu should get about 60-80 volts out of the 115 receptacle. Plug in a light bulb and see if it lights. If it does then the field and stator are probably ok and you need to look elseware. Make sure breakers and connections are ok from the stator and receptacle.

Posted on Jul 29, 2009

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Good Luck with that...but if engine runs and there is no output voltage, that generally means that the stator needs to serviced or replaced (likely as pricey as a new genny).

Posted on Mar 10, 2009

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I need a rectifier or avr for generac 3500 xl genarator


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  • Jun 28, 2016 | Generac Electrical Supplies

    1 Answer

    Output voltage adjustment


    Output voltage is based on 3600 rpm @ 60Hz. Sounds like your generator is over speeding slightly. Put a Frequency meter on the output of the generator and tune it to 61.5 Hz, that will get your generator in the 3600 RPM range.

    Jul 17, 2014 | Dewalt DG7000 Heavy-Duty 7000 Watt Gas...

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    Low voltage


    You have overloaded the generator and have blown a capacitor, resistor or similar item that will only allow half the voltage output to the recepticals. I know I have done this too.

    Dec 05, 2013 | McCulloch 11 HP 5700 WATT GENERATOR

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    We have a Valsi 5500 watt generator that isn't putting enough voltage out to run everything in out small travel trailer. It runs the lights but doesnt push out enough voltage to carry the A/C, microwave,...


    How long have you had this generator?
    Has the generator worked on all of these loads before?
    Model 5500 is a 5500 Watt generator which could easily be 5500 watts (Peak) and not continuous.

    Your AC is an inductive load.
    Your lights are resistive loads

    An inductive load can cause issues when starting due to an increased current demand at start up that some generators cringe under. Do the lights flicker or are they stable? I'd say your diodes on your stator are working if you have light stability but you haven't provided nearly enough information for a detailed solution.

    I'm sure you have enough voltage but you aren't getting enough current to run specific loads. How many watts is your AC? How many watts for your microwave? Both of these units demand a great deal of energy to run and when you place too much demand on your generator, it will choke it out and eventually, will cause damage to the generator. You may consider getting a beefier generator with a greater amount of wattage output.


    Seeing these specs online and noting what you are trying to run, you have an undersized generator and need to get one that can produce a greater amount of running wattage (as well as peak wattage).

    Apr 12, 2011 | Watts Onan Portable Generator - 4000 ,...

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    7 hp brigs engine on my generator runs two fast producing 127 volts. how do I slow it down?


    Hi and welcome to FixYa. I am Kelly. Since you did not mention the make or model number of your generator I will respond in generic terms. If your generator is at 127 volts with NO load it is adjust at the very top end of the manufacturers limits. There is a 10% tolerance so 120 VAC + 12 is 127 VAC. Under an electrical load above 500 watts the generator should drop the output voltage slightly so your generator would still be within factory limits. Personally on any generator as a repair person; I set the output voltage at 126 VAC no load so that when the user puts the generator to work the output voltage is good. If your generator is running at 127 VAC under load then you can adjust the governor screw on the governor plate CCW about 1/2 turn to drop the voltage. Without a generator model number or engine number I can not tell you exactly where the governor plate is on your engine / generator. The screw will have a lock nut that you must loosen 1/4 turn then turn the adjustment screw CCW to drop the voltage. Just make sure to re-tighten the lock nut when the adjustments are complete. Mind you by decreasing the output voltage you also drop the output freqency at the same time you decrease the output voltage. It is better to have 125 -127 VAC under a no load condition as the more electrical load you add the more voltage drop you will notice. It is best to adjust the generator to 122.5 -123 VAC under a medium load. (50% of output capacity) A bread toaster is 1400 - 1600 watts and is a good load for a 3000 watt generator. Also a good hand held hair dryer will use around 1600 watts. If you use this type of load and the voltage output is 122.5 to 123 VAC I would not adjust anything. I have been working on generators since 1970 so this is nothing new for me. I hope that you understand everything I posted. If not, feel free to ask as many questions as you wish in any future response.
    Thanks for choosing FixYa,
    Kelly

    Jan 08, 2011 | Craftsman Electrical Supplies

    1 Answer

    Valsi 7.5kw gen. The output voltage varies about 30 % with or without a load. the generator seems to be running at a constant speed. the speed of variation is a pproximately 1/2 hz. It would appear a...


    Sometimes the voltage will be higher with absolutely NO load. Try a small load and see if it comes down. If not, then need a replacement AVR.

    Jan 01, 2011 | Electrical Supplies

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    Ust 3000 generator-only idles-no voltage output


    chek brushes...if they seemed ok then replace AVR card

    Sep 05, 2009 | Coleman Powermate Powermate 5000W...

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    No output from my generator


    check breaker, your outlets should be like a gfi

    May 21, 2009 | Coleman Powermate Premium Plus 6250W...

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    67 votage display on generator output.


    Please stop making new problem threads each time you answer, instead post a comment to one of the 5 threads you already have open for this problem. It's getting hard to follow the conversation :-)

    OK, now to the problem. You say you have checked 67 volts is displayed on the generator output, I think this means that you see 67 volts on the control panel display when the generator is running. This can be several different problems:
    a) a bad CT/PT module that tells the controller the wrong voltage
    b) a bad A/D module inside the controller itself
    c) a bad voltage regulator

    Get a real DMM meter and measure the voltages at the top side of the output (large) circuit breaker of the generator. Put the black lead of the meter on the neutral wire and then measure to each of the phase wires on the circuit breaker. If you get normal voltages then you probably have a bad A/D, if you get 67 volts on all 3 phases you have some other problem.

    You still haven't told me what model/spec of generator this is, look on the data sticker on the generator cabinet.

    Peace,
    Carl

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