Product Manual B

5. Maintenance5-2019

A complete system test is recommended to verify that the electrical system is

working properly. Testing the system once every 200 hours or every 2 years is

required to make sure the transfer switch will transfer the load to the generator set if

there is a utility power failure. For more information, see the transfer switch owner

manual.

To initiate a complete system test:

1. Before starting:

• Check the oil level.

• Verify that fuel related components, such as manual valves, outside of the

generator set are open.

• See the Checklist section in the installation manual.

2. Place the generator set in Standby mode.

3. Switch the main utility disconnect from the ON to the OFF position.

4. Make sure the following occurs:

a. The generator set starts.

b. After the generator set starts and stabilizes, the load is transferred from the

utility to the generator set.

5. Switch the main utility disconnect from the OFF to the ON position.

6. Make sure the following occurs:

a. After approximately 5 minutes, the load is transferred back to the utility.

b. Once the transfer switch is connected to utility power, after approximately 5

minutes, the generator set stops.

NOTICE

If the test fails, call your authorized Cummins service provider to fix the

problem.