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Cummins/Onan — . Resistance of Zener diode CR6 should be 600

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. 7. Resistance of resistors R6, R5, and R3 should be
  2. 8. Rectifier CR1 normally has 600 ohms in one direction, infinity in the other direction. fl ba SN EAS

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.