Cummins/Onan — With-Load Standby System Test
Operation · Transfer panel
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Close and lock the cabinet door when not working inside the cabinet.
Procedure
- Move the Load/No-Load switch on the control circuit board to the Load position.
- Keep the Auto/Man switch in the Auto position to enable automatic retransfer.
- Replace the cover over the circuit board and close the cabinet door.
- Notify occupants and turn off electronic devices prior to removing utility power.
- Reduce load until total does not exceed 80% of the generator kW rating.
- Remove the AC utility power to the transfer panel.
- Activate the remote test input. Generator should start and assume load after time delays.
- Deactivate remote test input and restore AC utility power.
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.