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Home›Repair guides›Cummins/Onan›With-Load Standby System Test

Cummins/Onan OT-A-4060A / OT-C-10050C — With-Load Standby System 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 that can cause severe personal injury or death.

Procedure

  1. Place the Test With/Without Load selector switch on the Power Sentry control in the With Load position.
  2. Close the cabinet door.
  3. Move the Test/Normal/Retransfer switch to Test. The generator set should start and assume the load after the transfer time delay.
  4. At the end of the test period, move the switch to Normal to retransfer after the retransfer time delay.
  5. To bypass the retransfer time delay and retransfer immediately, move the switch to Retransfer and release.
  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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