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Home›Repair guides›Cummins/Onan›Generator Set Start Test

Cummins/Onan OT-A-4060A / OT-C-10050C — Generator Set Start Test

Operation · Transfer switch

For the Cummins/Onan OT-A-4060A / OT-C-10050C, from the Cummins/Onan service manual.

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Before you start

  • AC power within the cabinet and the rear side of the cabinet door presents a shock hazard. Close the cabinet door before testing.

Procedure

  1. Place the Test With/Without Load selector switch on the Power Sentry control in the Without Load position.
  2. Close the cabinet door.
  3. Move the Test/Normal/Retransfer switch to Test. The generator set should start and run.
  4. At the end of the test period, move the Test/Normal/Retransfer switch to Normal. The generator will stop.
  5. Check that the With/Without Load selector switches are in the desired positions for scheduled exercise.
  6. Close and lock the cabinet door.

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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