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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
  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.