Cummins/Onan OT UCD 280 — Start-Stop Time Delay Adjustment (Solid-State)

Adjustments · Start-Stop time delay module 7

For the Cummins/Onan OT UCD 280, from the Cummins/Onan service manual.

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Procedure

1. Open the cabinet door of automatic transfer switch.
2. Move the load selector switch to WITH LOAD.
3. Move test transfer switch to TEST.
4. With a stopwatch or watch with a second hand, measure the time until the generator set starts cranking.
5. Insert a small screwdriver through the START hole in the front panel of the start-stop time delay module; turn the START potentiometer to adjust start time delay.
6. Move test transfer switch to NORMAL.
7. Measure time until generator set begins to shut down.
8. Turn the STOP potentiometer with the small screwdriver to adjust the stop time delay.
9. Repeat until desired delay times are obtained.
10. Move the load selector switch to desired position, WITHOUT LOAD or WITH LOAD.

Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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