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Ask Hank F. Your Own Question
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 14618
Experience:  Certified on Onan and Generac generators
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We have a Generac RV generator model 004700-0. It runs great

Customer Question

Hi. We have a Generac RV generator model 004700-0. It runs great for 12-14 hpurs and then shuts off all of a sudden. Any known issues we can look for? The power center is a Parallax series 7300 if that helps any...
Submitted: 1 year ago.
Category: Small Engine
Customer: replied 1 year ago.
Correction the generator stays running, we lose all power inside like the ac, lights etc.
Customer: replied 1 year ago.
after about 2min power come back on.
Expert:  Hank F. replied 1 year ago.

Hello, my name is ***** ***** I am going to assist you with this.

There are no known "issues" with this, but there are a couple of things that can cause it.

The most common would be that the DPE breaker is weak, or is being overloaded.

A bad rotor or dirty slip rings could cause the DPE to overheat.

But it is very weird that it would run that long before losing power. Normally it would be a time frame of more like 20 - 30 minutes.

The next most common thing would be a voltage regulator going bad.

Unfortunately, neither of those can be easily tested with the genset mounted in the coach. The component are inside the control box, and access is very limited with the top cover on.

Customer: replied 1 year ago.
What is a Dpe
Customer: replied 1 year ago.
Where is the voltage regulator / rotor /slip ring
Expert:  Hank F. replied 1 year ago.

DPE is Dual Phase Exciter. It is a special circuit breaker located in the control box.

The voltage regulator is also in the control box.

The slip rings are part of the rotor, which is the center part of the generator that turns with the engine.

The brushes are part of the beariung carrier, and ride against the slip rings,.

The genset needs to be completely disassembled to access the brushes and slip rings.

Expert:  Hank F. replied 1 year ago.

Was this what you wanted to know?