Cummins/Onan QST30 — Digital Power Factor Display Calibration
Adjustments · PCC digital display
For the Cummins/Onan QST30, from the Cummins/Onan service manual.
Applies to: Cummins/Onan DFHA, Cummins/Onan DFHB, Cummins/Onan DFHC, Cummins/Onan DFHD, Cummins/Onan QST30, Cummins/Onan QST30 engine
Procedure
- Select >> from Main Menu, proceed to PF1 menu.
- With generator set OFF, attach power factor meter to L1.
- Start generator set and allow to reach normal operating speed.
- Load generator set to maximum rated kVA at rated voltage.
- Calibrate PF1 reading to agree with power factor meter.
- Repeat steps 24 through 27 for L2 and L3.
- Select EXIT if no calibration; SAVE then EXIT if calibration made.
Tools required
- power factor meter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan DFHA →, Cummins/Onan DFHB →, Cummins/Onan DFHC →, Cummins/Onan DFHD →, Cummins/Onan QST30 →
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.