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Hello, my name is ***** ***** I am going to assist you with this.
What are the model and serial numbers of the genset?
I work 2 jobs, and help on Just Answer in the evenings.
I can not be online 24/7, but am online almost every day.
I do not have to be online for you to reply. If you post your reply, I will get it when I log on.
But I can do nothing at all if I don't know what you are working on.
All I need for now is the model number and serial number of the genset. It is on the data tag.
It will be on the genset itself. Exactly where depends on which model it is.
I don't need a picture.
All I need is the model and serial numbers.
About how old is this thing?
I can not get the model number to come up at all, and a Generac serial number has been 7 digits long for at least 20 or 30 years. I have never seen a 6 digit serial number - and I've been a Generac tech for 15 years.
Can you get a picture of the entire unit?
Ok, I actually know several sister units to this one.
I need you to do a procedure called the Fixed Excitation Test.
I have uploaded the instructions for doing it.
Please do test #3, and let me know the results.
Click here to download the test.
The wires at the voltage regulator are marked.
The AC leads are the wires that the 120V comes out from.
It is easiest to just test at the input to the circuit breaker, with the breaker shut off.
Unfortunately, I will not be available tomorrow.
I have to go visit my daughter in college tomorrow, and will not be back until very late.
As I stated earlier, I do not have to be online for you to post. I will get your message when I log on.
I work my primary job this weekend, and work 6:30AM to 7PM.
I will be checking in sometime after about 7:45PM.
But just follow the instructions I sent to you. They make better sense once you get in there.
Did you do the test yet?
I did. Yesterday was her 21st birthday. Had to go see her.
Just use the battery that is connected to the genset. You can pull the power from the starter solenoid, or the back of the fuse holder. There is no need to carry in an extra battery.
Yes, a 6500 watt genset should run both A/Cs with no problem.
If it is tripping the breakers on the genset, it can only have a few causes.
From least likely to most likely, they are:
Bad breakers on the genset
Bad A/C units
Genset not producing enough voltage
Too many things on in the RV, besides the A/C units.
The genset needs to be putting out 120 - 126 volts, with no load on the unit.
The best place to test is at the input to the circuit breakers, with the breakers shut off to prevent any outside interference.
That depends on what the actual reading is.
ON the input side of either breaker.
No, you have to test from the breaker to neutral. There is no reverse polarity with AC.
Put one meter lead on the breaker, and the other to neutral.
There is a stud on the side of the panel in there that contains the neutral and grounds. It will probably have 6 or 8 wires attached to it.
That is also the neutral bus. This unit has a bonded neutral.
I actually am a certified Generac technician - I do not need all those pictures.
Since the generator is producing power when you apply 12V directly to the brushes, just not on its own,, the problem is a bad voltage regulator. You will need to get a new one.
That wasn't what you explained in your last post.
Remember, I can't see or hear what is going on, and only know what you tell me.
What 3rd wire are you talking about? What is the number on the wire?
Use a voltmeter and test wire 4 for 12V while the engine is cranking.
If it does not have 12V, follow it to the next device. The next device is the Choke Module. It will have (2) wires #4.
If you do not get 12V at the VR, check it at the CM while cranking the engine (leave it connected). Do you get 12V here?
At the CM, there is also a wire #15. Test it for 12V while cranking the engine. Does it have 12V?
CM is Choke Module, as I explained above. Yes, VR is Voltage Regulator.
Just follow the wire 4 from the Voltage Regulator to find the Choke Module. It is the device to the left of the Voltage REgulator.
Don't worry, if I throw an abbreviation out there, it will not be out of the blue. I will have spelled it out in the post.
All of the wires are numbered with stenciling on the wire.
Wire 15 will be in the middle of the 5 positions on the CM.
Ok, the problem here is that the CM is not providing field flash to the VR.
Power goes in to the CM on wire 15, and is passed to the VR while cranking. Your CM is not passing the power, so the problem is a bad CM, not a bad VR.
You can order one through any Generac dealer, or from this website:
That is the Choke Solenoid.
The part number for the solenoid is 044128. It is available at that site.