Cummins/Onan 1750DQKB / 3200 Series — Bus Voltage Calibration (C)
Testing & diagnosis · Bus PT module
For the Cummins/Onan 1750DQKB / 3200 Series, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 1750DQKB, Cummins/Onan DFE
Procedure
- Display the Bus Voltage Calibration submenu.
- With all gensets OFF, attach a calibrated voltmeter to TB1-A (L1) and TB1-B (L2) of the bus PT module.
- Start another genset and allow it to reach normal operating speed and voltage. Connect to the bus.
- Calibrate the voltage reading for Bus Volts L1 so the display matches the calibrated meter.
- Shut the generator set OFF.
- Repeat steps 2 through 5 for Bus Volts L2 and L3.
- Exit menu to save changes.
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 1750DQKB →, Cummins/Onan DFE →
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.