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Cummins/Onan DFLE Generator Set

The Cummins/Onan DFLE is a 1250 kW (1875 kVA) Diesel standby generator set powered by a Cummins/Onan KTA50 series engine. It is available at 24 V, Single Phase-phase and 60 Hz. It holds about 44.7 L (11.8 gal) of oil and 386 L (102.0 gal) of coolant, with a maximum ambient rating of 40 °C. Starting uses 4 group-12 batteries rated 1400 CCA at 24 V. The set measures 480×12192×96 mm (18.9×480.0×3.8 in), weighs about 50800 kg (111995 lb) and produces 74 dBA at 7 m. The same KTA50 series engine also powers generator sets from AKSA.

1250 kW
Standby
50.0 L
Displacement
44.7 L
Oil capacity
4
Document types

How to read your Cummins/Onan serial & model number →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power1250 kW
Standby kVA1875
Prime power1250 kW
ControllerDetectorControl, PowerCommand 2100, PowerCommand 3100 (PCC), PowerCommand with AmpSentry Protection
Oil capacity44.7 L
Voltage options24 V
PhaseSingle Phase
Battery groupFour, 12 Volt
Battery cranking1400 CCA
Battery voltage24 Volts DC V
Battery quantity4
Coolant capacity386 L
Max ambient40 °C
Dimensions (L×W×H)480×12192×96 mm
Dry weight10350 kg
Sound level74.0 dBA @ 7 m

Engine

Cummins/Onan KTA50 series
Oil capacity44.7 L
Coolant capacity348.0 L
Displacement50.0 L
Aspirationturbocharged and after-cooled
Rated speed50 rpm

Maintenance & consumables

for the Cummins/Onan KTA50 series
ItemSpecCapacityPart #Interval
Air filter— find
Fuel filter— find
Oil filter— find
Belt— find
Coolant—
Oil—

Common questions

What is the power rating of the Cummins/Onan DFLE?

The Cummins/Onan DFLE is rated 1250 kW standby (1875.0 kVA).

What engine does the Cummins/Onan DFLE use?

The Cummins/Onan DFLE is powered by the Cummins/Onan KTA50 series engine.

What fuel does the Cummins/Onan DFLE use?

The Cummins/Onan DFLE runs on Diesel.

What is the oil capacity of the Cummins/Onan DFLE?

The Cummins/Onan KTA50 series engine in the Cummins/Onan DFLE has an oil capacity of 44.7 liters.

Troubleshooting

55

Fault codes

CodeMeaning
1131Battle Short mode is enabled.
1416An overridden shutdown fault occurs, but the genset does not shut down.
234Overspeed fault.
1433Emergency Stop fault.
1434Remote Emergency Stop fault.
121Speed Signal Lost fault.
2335Excitation Fault.
1123A shutdown occurs immediately after moving the customer installed Battle Short switch to OFF with an active but overridden shutdown fault or a shutdown fault that was overridden at any time.
135Oil Pressure Sensor High
141Oil Pressure Sensor Low
143Pre-Low Oil Pressure Sensor
144Coolant Temperature Sensor High
145Coolant Temperature Sensor Low
146Pre-High Cool Temp
151High Coolant Temp
197Low Coolant Level
235Low Coolant Level
359Fail to Start
415Low Oil Pressure
441Low Battery Voltage
442High Battery Voltage
1124Delayed Shutdown
1244Engine Normal Shutdown
1311Customer Inputs #1
1312Customer Inputs #2
1317Customer Inputs #3
1318Customer Inputs #4
1334Crit Scaler OR
1335Non-Crit Scaler OR
1417Power Down Failure
1435Low Coolant Temperature
1438Fail to Crank
1442Weak Battery
1443Battery Failed
1444KW Overload
1445Short Circuit
1446High AC Voltage
1447Low AC Voltage
1448Under Frequency
1449Over Frequency
1461Loss of Field
1466Modem Failure
1468Network Error
1469Speed/Hz Match
1471Over Current
1472Over Current
2336Memory Error
2341High Control Temperature
2342Too Long in Idle
2967Governor Fault
2968AVR Fault
2969LON Failure
2972Field Overload

Symptoms & remedies

SymptomCauseRemedy
Engine does not startPlace the O/Manual/Auto switch in the O position and press the Fault Acknowledge/Reset button. Before attempting to restart, wait two minutes for the starter motor to cool and then repeat the starting procedure. If the engine does not run after a second attempt, refer to the Troubleshooting section.
Engine cold (Code 1435) messageThe engine jacket water coolant temperature falls below 70°F (21°C)Check the coolant heaters for proper operation. If the coolant heaters are operating properly, other precautions may be necessary to warm the engine before applying a load.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

46
Part #DescriptionQtySystem
140-1548Element, Air Cleaner2Air filter Amazon eBay $91.60
140-2096Element, Primary (Outer)2Air filter buy
140-2097Cleaner, Air (Includes Elements)2Air filter FridayParts $856.89
140-2467Element, Safety (Inner)2Air filter buy
140-2501Cleaner, Air (Disposable)2Air filter FridayParts $152.02
140-2502Band, Mounting – Air Cleaner4Air filter Amazon eBay $59.99
140-2503Bracket, Mounting - Air Cleaner1Air filter buy
140-3163Cleaner, Air (No Replaceable Element)2Air filter Amazon eBay $23.99
140-3230Cleaner, Air (Includes Elements - See Ref. No. 25 and 26)2Air filter Amazon eBay $95.60
502-1162Connector, Hose (3/8")2Hose buy
503-0685Clamp, Hose2Hose buy
503-1484Elbow, Hose (45 Deg) (7" ID)2Hose buy
503-1620Hose – Bulk (3/8" ID) (Order by the Foot)-Hose buy
503-1870-11Clamp, Hose2Hose buy
503-1870-12Clamp, Hose2Hose buy
960-0504PCC Control Service Manual*Service manual buy
960-0507Detector Control Service Manual**Service manual buy
FS1216Fuel/Water Sep Spin-On2Fuel filter Amazon eBay $44.99
LF3325Lube, Full-Flow Spin-On5Oil filter Amazon eBay $176.70
140-1260Fitting, Safety Filter2Service part / kit Amazon eBay $35.00
140-2098Hood, Air Inlet (Includes Mounting Clamp)2Service part / kit Amazon eBay $49.99
140-2099Band, Mounting4Service part / kit Amazon eBay $19.99
140-2395Tube, Air Inlet1Service part / kit buy
140-2504-01Bracket - Right Side1Service part / kit buy
140-2504-02Bracket - Left Side1Service part / kit buy
140-2508Tube, Air Inlet (7" x 9" - 3/4")2Service part / kit Amazon eBay $129.95
140-2509Tube, Air Inlet2Service part / kit buy
140-2515Bracket, Mounting1Service part / kit buy
140-2519Tube, Air Inlet2Service part / kit buy
140-2521Tube, Air Inlet2Service part / kit buy
140-2528Shield – Air In Heat1Service part / kit buy
309-0635-02Valve, Check2Service part / kit buy
503-1717Elbow, Reducer (45 Deg) (7" ID to 6" ID)2Service part / kit buy
503-1720Insert, Reducer (6" OD to 5-1/2" ID)2Service part / kit buy
505-0017Bushing, Pipe – Reducer (3/8" to 1/4")2Service part / kit dieselpartscenter $2032.36
505-0376Elbow – 45 Deg (3/8")2Service part / kit buy
526-0030Washer, Flat (3/8")8Service part / kit buy
800-0055Screw, Cap – Hex Head (3/8–16 x 2-1/4")8Service part / kit buy
800-0094Screw, Cap – Hex Head (1/2–13 x 2")8Service part / kit buy
821-0029Screw, Self–Locking – Hex Washer Head (3/8–16 x 3/4")8Service part / kit buy
821-0033Screw, Self–Locking – Hex Washer Head (7/16–14 x 3/4")8Service part / kit buy
821-5004-03Screw, Self-Locking – Hex Washer Head (3/8–16 x 1")2Service part / kit buy
870-0281Nut, Self-Locking – Hex Washer Head (3/8–16)2Service part / kit buy
960-0606Service part / kit buy
960-0608Service part / kit buy
F-2061Installation of two C1400 D5 generator setsService part / kit buy

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime
Prime25%111.029.2
Prime50%180.047.6
Prime75%257.068.0
Prime100%330.087.3
Standby
Standby25%124.032.8
Standby50%211.055.8
Standby75%301.079.4
Standby100%392.0103.6

Available documents

Spec sheetOperator's manualParts manualService manual

Other sets with this engine

Cummins/Onan DFLBCummins/Onan DFLC