Cummins/Onan — Voltage Measurement for Regulation (Regulation Calibration)
Adjustments · PCC1302 control
From a Cummins/Onan service manual covering: 1302 series control, HMI211, HMI211RS, PCC 1302. Check it applies to your exact model before use.
Applies to: Cummins/Onan PCC 1302
Procedure
- View the Service Menu by holding down the "up" and "down" arrow keys on any of the operator menus.
- Select item 1, "Setup Menus".
- Enter setup menu password 574.
- Select item 1, "Genset Service".
- Select item 1, and verify the "Volts AC" setting is correct for your application; adjust and save if necessary.
- Press the back button to return to the service menu.
- Select item 3, "Meter Calib."
- Press the "Adjust" button and change the "Reg Volt Adj:" value. The effect of this trim is inverse on the regulated voltage.
- Save the adjustments by pressing the "Save" button.
Tools required
- Calibrated voltmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan PCC 1302 →
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.