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Hank I have under voltage issue with my generac 20k

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Hello Hank I have under...
Hello Hank I have under voltage issue with my generac 20k generator. I changed the nexus controller board, I also changed the brushes and it's still giving me under voltage error.
Submitted: 8 months ago.Category: Small Engine
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Answered in 3 minutes by:
11/17/2017
Technician: Hank F., Technician replied 8 months ago
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15,901
Experience: Certified on Onan and Generac generators
Verified

Hello, thank you for requesting me.

What are the model and serial numbers of the genset?

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Customer reply replied 8 months ago
Model(###) ###-####Serial(###) ###-####
Technician: Hank F., Technician replied 8 months ago

Ok, thanks.

The first thing you need to do is to connect a meter to the output of the genset. Connect one meter lead to the back of one of the circuit breakers, and the other lead to the ground lug.

Start the set, and note the voltage.

Now switch your meter over to read frequency.

What are the voltage and frequency readings?

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Customer reply replied 8 months ago
12.5
Technician: Hank F., Technician replied 8 months ago

What is 12.5?

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Technician: Hank F., Technician replied 8 months ago

Did you get the voltage and frequency readings yet?

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