Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›3 See Printed Circuit Board Tests (Spec C and D).

Cummins/Onan — 3 See Printed Circuit Board Tests (Spec C and D).

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. 1. Put auto-manual switch in “MANUAL” position and stop generator set with start-stop switch on engine control.
  2. 2. Remove the lead from the load side of the contactor in the demand control.

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.