Cummins/Onan QMS11−G2 NR3 Engine
The Cummins/Onan QMS11−G2 NR3 is an engine. It powers generator sets from Cummins/Onan, including the DQHAB.
Also known as: Cummins Inc. QMS11−G2 NR3
Part of the Cummins/Onan QMS11 engine family — 2 variants share parts & fitment.
Common problems
15- LOW BAT VOLTAGE — Warning 441
Cause: Battery voltage supply to the control is approaching a low level at which unpredictable operation will occur; discharged or defective battery
Fix: Check the battery charger fuse. Recharge or replace the battery - Overspeed — Shtdn 234
- LOW COOLANT TEMP — Warning 1435
Cause: Engine coolant heater is not operating or is not circulating coolant; coolant heater not connected to power supply
Fix: Check for blown fuse or disconnected heater cord and correct as required - J1939 time out error — Wrng 285
- WEAK BATTERY — Warning 1442
Cause: During cranking, the battery voltage is at or below the weak battery warning trip point for a time greater than or equal to the weak battery set time
Fix: See code 441 for corrective action - Water in fuel high — Wrng 1852
- VGT comm timeout — Wrng 1894
- Under Frequency — Shtdn 1448
- Unack fault warn — Wrng 2962
- TRB in temp sen low — Wrng 692
- TRB in temp sen high — Wrng 691
- TOO LONG IN IDLE — Warning 2342
Cause: Genset has been in Idle mode too long (10 minutes maximum) - Speed/Hz Match — Shtdn 1469
- Speed Signal Lost — Shtdn 115
- Speed Signal Lost 121
Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan QMS11−G2 NR3.
Common questions
Which generators use the Cummins/Onan QMS11−G2 NR3 engine?
The Cummins/Onan QMS11−G2 NR3 powers 1 generator set(s), including Cummins/Onan DQHAB.
What is a common problem with the Cummins/Onan QMS11−G2 NR3 engine?
A commonly reported issue on generators using the Cummins/Onan QMS11−G2 NR3 is: LOW BAT VOLTAGE — Warning. Cause: Battery voltage supply to the control is approaching a low level at which unpredictable operation will occur; discharged or defective battery. Fix: Check the battery charger fuse. Recharge or replace the battery.