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Cummins/Onan DF Series — Generator Voltage Adjustment (Without Detector AC Option)

For the Cummins/Onan DF Series.

Applies to: Cummins Onan Df Series

Before you start

  • High voltages in the control present an electrical shock hazard which can cause severe personal injury or death. Proceed with care!

Procedure

  1. Open control panel doors, locate VRAS-2 (upper left), and refer to Figure 20 to locate terminal board TB1 and R32 potentiometer.
  2. Connect an accurate 2% voltmeter to VRAS-2 terminal board TB1-2 and TB1-3 terminals (Figure 20).
  3. While observing the voltmeter, insert a screwdriver into R32 potentiometer and slowly turn to increase or decrease voltage until adjusted to the rated nameplate voltage.
  4. Disconnect voltmeter from TB1 and close control panel doors.

Tools required

  • Screwdriver
  • Voltmeter (2% accuracy)

Specs & torque values

  • Connect to VRAS-2 terminal board TB1-2 and TB1-3 terminals

Source: manual:960-0602 Onan DFM DFP Installation Manual (10-1986).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.