Cummins/Onan — Test Procedure

Testing & diagnosis · EC-30 installation

From a Cummins/Onan service manual — check it applies to your exact model before use.

Applies to: Cummins/Onan HDKA, Cummins/Onan HDKB, Cummins/Onan HDKC

Procedure

1. Reconnect the genset negative (-) battery cable.
2. Insert the fuse in the fuse holders for Wire #7 8-35VDC Power, Wire #8 House Battery Sense, and Wire #9 Engine Battery Sense.
3. Refer to the Setting Up section and select the genset type.
4. Set the hour-meter if the EC-30 is installed on an existing genset; skip this step on a new genset.
5. Start and stop the genset using the Stop/Start switch located at the genset to confirm genset operation.
6. Start the genset at the EC-30 and check the Start/Stop indicator light flashes while cranking (units with diagnostics only).
7. Confirm the genset starts and continues to run, and that the Start/Stop indicator light remains illuminated while running.
8. Scroll to the Hour Meter display and confirm it is operating.
9. Scroll to the Volt Meter display and confirm it is operating.
10. Stop the genset at the controller and check that the genset stops, the indicator light turns off, and the Hour Meter stops.
11. Use the TEST SYSTEM displays to sequentially test all inputs and outputs.
12. Set the clock to the current local time.

Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKB →, Cummins/Onan HDKC →

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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