Cummins/Onan — Adjusting Voltage Using Digital Display
Adjustments · Generator set control / digital display
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKB, Kubota D1105 engine, Kubota V1505 engine, Kubota V2003 engine, Kubota V2403 engine, Kubota V3300 engine
Before you start
- Disconnect all generator loads before adjusting voltage.
Procedure
- Start the generator set and let voltage and frequency stabilize for 5 to 10 seconds; disconnect all loads.
- Rapidly press START 6 times during the first minute after startup to enter voltage adjust mode.
- To adjust voltage up, press and quickly release START; voltage increases approximately 0.6 volts per press and release.
- To adjust voltage down, press and hold START for about 1 second; voltage decreases approximately 0.6 volts per press and release.
- Wait about 20 seconds for the display to change from Volt Adj to Running, then press STOP to save the adjustment.
- Restart the generator set and check voltage.
- Recalibrate AC voltage on the digital display as instructed in the Operator Manual.
Tools required
- Accurate AC voltage and frequency meters Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Voltage change approximately 0.6 volts per press and release
Full service-parts list: Cummins/Onan MDKB →, Kubota D1105 engine →
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.