Service manual

3. Maintenance 9-2013
3.2 Cleaning the Housing Top
The top surface of the generator set housing can be damaged by pressure washing or solvents
and other cleaning agents. Only use soap and water or an “all citrus degreaser" to clean the top.
3.3 Exercising the Generator Set
NOTICE
Audible engine RPM variation may be heard while there is no load applied. This is
normal and does not affect genset performance.
Exercising the generator set drives off moisture, re-lubricates the engine and removes oxides
from electrical contacts. The result is better starting, more reliable operation and longer engine
life.
The generator set exerciser is capable of automatically starting the generator set and letting it
run for 20 minutes, once every 28 days, or more often, if desired.
Refer to the Exercise Settings section of this manual for more information on setting up the
exerciser.
3.4 Complete System Test
A complete system test is recommended to verify that the electrical system is working properly.
Testing the system once every three months is required to make sure the transfer switch will
transfer the load to the generator set, should there be a utility power failure. For more
information, see the automatic transfer switch Operator Manual.
To initiate a complete system test:
1. Switch the main utility disconnect from the ON to the OFF position.
2. Make sure the following occurs:
a. The generator control starts the generator set.
b. After the generator set starts and stabilizes, the load is transferred from the utility to
the generator set.
3. Switch the main utility disconnect from the OFF to the ON position.
4. Make sure the following occurs:
a. After a time delay, the load is transferred back to the utility.
b. Once the transfer switch is connected to utility power, after a time delay, the generator
set stops.
NOTICE
If the test fails, call an authorized Cummins dealer to perform the testing.
12 A030A239 (Issue 10)