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Home›Repair guides›Operate when Load is Connected (TROUBLESHOOTING, Spec D models).

Cummins/Onan — Operate when Load is Connected (TROUBLESHOOTING, Spec D models).

For these Cummins/Onan models: 15.0 HA - 21 - a, 7.5 HA - 21 - a.

Applies to: Cummins Onan 15 0 Ha 21 A, Cummins Onan 7 5 Ha 21 A

Procedure

  1. 9. Check generator set operation without automatic demand control. Disconnect demand control from generator set. Start generator set with start-stop switch on set controls. If set doesn’t operate properly, reconnect demand control and refer to the generator set operator's manual or service manual.
  2. 10. Jumper A2K1 terminal 30 to TB1-3, then remove jumper. Remove quickly if unit starts.

Source: manual:907-0500 Onan HA Auto Demand Control Service Manual (06-1984).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.