Question about Kohler 12 kW Emergency Power System - 12RES-L
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Posted on Jan 02, 2017
SOURCE: Code UU
Here is the code explained direct from Kohler's manual. I'd disconnect the generator load first.
UU Undervoltage Shutdown occurs if the voltage falls below 80% of the nominal system voltage for more than seconds. Check wiring and connections.
Reduce the load and restart the generator set. —
Check wiring and Check controller configuration, system voltage
and frequency (parameter UU).
Check AC voltage and adjust, if necessary. 5.7
Replace the SCR module and test voltage again. 4.9
Separately excite unit. 5.2
Check stator continuity
See web site for manual :http://www.kohlerpower.com/onlinecatalog/pdf/tp6196.pdf
Posted on Jul 11, 2010
If it has a couple hundred hours or more, try cleaning the slips rings on the back of the rotor shaft. They should be very shiny and not black or polished looking.
Posted on Sep 06, 2011
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