Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›connector on the internal control panel and

Cummins/Onan HDZAA — connector on the internal control panel and

For the Cummins/Onan HDZAA.

Applies to: Cummins Onan Hdzaa

Before you start

  • ing for 2 seconds if necessary before the next crank.
  • Gen Wait should appear on the display.
  • Possible Cause/Diagnosis/Repair
  • The generator will make up to three start at-
  • tempts, cranking each time for 5 seconds and paus-

Procedure

  1. pin connector on the internal control
  2. pin connector.
  3. 4
  4. Replace the internal control board if there is 12
  5. Replace the Operator Panel if it does not wake
  6. pin connector and a good ground at Pin 1.
  7. Clear the Gen Wait message from the Operator
  8. Check the fuel level and fill as necessary.
  9. Press the stop switch (p. 2-2) if it is not in its “1”
  10. Replace the fuel if it is not of the specified grade
  11. Check Fuel flow from lift pump, should be
  12. Verify that the fuel solenoid is getting 12V DC
  13. The cam to crank timing is off. Check Timing.
  14. Valves not set properly: Check Valve lash. Re-
  15. The injector nozzle is blocked or locked. Re-
  16. The injection pump is stuck. Remove the high
  17. Engine compression is low—blown head gas-
  18. Air in fuel system: Prime fuel system by turning

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.