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Cummins/Onan HDZAA — Service Procedure

For the Cummins/Onan HDZAA.

Applies to: Cummins Onan Hdzaa

Before you start

  • The generator will make up to three start at-

Procedure

  1. Verify that the battery is fully charged and that
  2. Check for 12 VDC at Pin 12 of the 12-pin con-
  3. Replace the internal control board if there is 12
  4. Replace the Operator Panel if it does not wake

Source: manual:983-0502 Onan HDZAA (spec A-B) Diesel Genset Service manual (06-2010).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.