Generac GP7000E Generator outputting only 110v

[oldlawnguy]

Generac Model: 0056260 Serial: 5452944 (don't know the build date)

Unit is basically/looks new, however it only outputs 110v not 120v and (while testing) blown out LED bulbs and Alexa devices. Trying to help a neighbor who wants to give to me and go buy another generator.

Pulled the schematic and suspect the

GENERAC 0G84440101 CAPACITOR VOLTAGE REGULATOR​

Any tips on how to confirm this and or what else to check to help troubleshoot?

I tried to lookup the above part number and it appears no one has it including Generac, so is there any cross reference part numbers to source?

It's a $19.00 part!

Thanks

 

[StarTech]

You need to contact Generac on this one to verify that 28 microfarad capacitor is the correct one.

Wiring schematic shows a 47 microfarad 450 vac capacitor yet the pn given is a 28 microfarad 450 vac capacitor.

 

[oldlawnguy]

You need to contact Generac on this one to verify that 28 microfarad capacitor is the correct one.

Wiring schematic shows a 47 microfarad 450 vac capacitor yet the pn given is a 28 microfarad 450 vac capacitor.

Good catch Star!!! I pulled the pn from the parts list. Where did you get the info 0G84440101 is 28mf? I'm going to call them on Mon.

Thanks!

 

[StarTech]

 

[oldlawnguy]

View attachment 62603

Interesting... I did find the part on Generac website, my bad as I was using "g" instead of G. Let's see what Generac support says on 28uf .vs 47uf as well as getting to root cause. Thanks again Star!!!

 

[ILENGINE]

Double check the engine rpm's had a generac generator a few years back that was only putting out 120 total instead of the 240 for both legs. Found out that it was only running half throttle. After speeding the engine up to the correct 3750 has correct voltage.

 

[oldlawnguy]

Double check the engine rpm's had a generac generator a few years back that was only putting out 120 total instead of the 240 for both legs. Found out that it was only running half throttle. After speeding the engine up to the correct 3750 has correct voltage.

Thanks ILENGINE
I did notice the choke was on 1/2 way. Will put a tach in it and measure.

Interesting... I did find the part on Generac website, my bad as I was using "g" instead of G. Let's see what Generac support says on 28uf .vs 47uf as well as getting to root cause. Thanks again Star!!!

Pulled off the OG84440101 It's 28uF part not 47uf as wiring diagram stated. Diagram has Rev E ECO chain so I wonder if 47uf was a phase in part. This unit was built in 2009

Measured with 2 different multimeters. On DCV was expecting like 5v, but highest I got on multiple readings was 2.01v but kept decreasing steadily as probes stayed attached. Other multimeter gave 0V.

Got 0.L for Ohms and no continuity. Seems bad to me unless I missed something??? Anything else to measure before ordering part?

 

[StarTech]

Capacitor don't test an OHMs meter or continuity meter as they tend to charge up. Also you will get false readings. To test a capacitor you need a capacitance meter. Some more expensive multimeters has this test available.

The reading should be between 26.6uf to 29.4uf when tested with one these meters which is +- 5%.

 

[oldlawnguy]

Capacitor don't test an OHMs meter or continuity meter as they tend to charge up. Also you will get false readings. To test a capacitor you need a capacitance meter. Some more expensive multimeters has this test available.

The reading should be between 26.6uf to 29.4uf when tested with one these meters which is +- 5%.

Ahhhhhh light shines on marble head.... Thanks Star!

 

[oldlawnguy]

Ahhhhhh light shines on marble head.... Thanks Star!

Star got ahold of a MM that measures capacitance... 27.52uf so it's good.

I asked neighbor more questions and he said the engine ran "rough" and he and electrician could only test generator with 1/2 throttle???

I'm gonna pick up on ILENGINE suggestion and go to engine side. Neighbor said the gas has plenty of Stabil in gas and I suspect that "plenty" may be the issue.

Gonna drain gas and put some of my own in a see what happens.

The generator was stored in cellar and always drained the tank and had regular maintenance. It literally looks like it just came out of the box.