Jump to content
Sign in to follow this  
chad  kalkowski

2008 kohler 5kw gen UU code ?

Recommended Posts

The UU code stands for under voltage shutdown due to the genset being overloaded. Not likely a result of genset's engine problems ... check for the overload condition first.

Switch off boat's 120vac genset breaker (generator supplied power cut off) and restart the genset under no load condition.

If that works, switch all 120vac systems off, switch 120vac genset breaker back on and start troubleshooting each system individually. When all systems check okay, then start increasing the load by switching on multiple systems.

The water heater, a/c, and microwave or stove running concurrently can take the 5kW genset down ... especially if you keep them powered while the genset is being started.

Share this post


Link to post
Share on other sites

Is the alternator putting out 120V? Check the generator fuses. What's your fuel tank level? If your fuel tank level is low, you generator may not be picking up enough fuel to run properly.

Share this post


Link to post
Share on other sites

I have seen that UU code, but there is usually another code first. It will give you that code sometimes as it is shutting down for another problem. I would put a new impeller in and see if that solves it. It is a cheap thing to do.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×