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Home›Repair guides›9 See Printed Circuit Board Tests (Spec C and D).

Cummins/Onan — 9 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. Check generator output voltage. See generator set operator’s manual.
  2. 2. Check the automatic control contactor coil. lf malfunctioning, see Line Contactor Pull-in Adjustment under CONTROL COMPONENTS.

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.