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Cummins/Onan DFLC Generator Set

The Cummins/Onan DFLC is a 1250 kW (1563 kVA) Diesel standby generator set powered by a Cummins/Onan KTA 50 G3 engine. It is available at 220/380 V, 240/416 V, 254/440 V, 277/480 V, 347/600 V and 2200/4160 V, Three Phase Reconnectable / Non-Reconnectable-phase and 60 Hz. It holds about 177 L (46.8 gal) of oil and 386.1 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 5652×2277×2441 mm (222.5×89.6×96.1 in) and weighs about 10864 kg (23951 lb).

1250 kW
Standby
50.3 L
Displacement
177.0 L
Oil capacity
5
Document types

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

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power1250 kW
Standby kVA1563
Prime power1100 kW
ControllerCascade, DetectorControl, PowerCommand, PowerCommand 2100, PowerCommand 3100 (PCC)
Oil capacity177.0 L
Voltage options220/380 V, 240/416 V, 254/440 V, 277/480 V, 347/600 V, 2200/4160 V
PhaseThree Phase Reconnectable / Non-Reconnectable
Battery groupFour, 12 Volt
Battery cranking1400 CCA
Battery voltage24 V
Battery quantity4
Coolant capacity386.1 L
Max ambient40 °C
Dimensions (L×W×H)5652×2277×2441 mm
Dry weight10864 kg

Engine

Cummins/Onan KTA 50 G3
Oil capacity254.0 L
Coolant capacity351.0 L
Displacement50.3 L
AspirationTurbocharged-Aftercooled
Rated speed1800 rpm

Maintenance & consumables

for the Cummins/Onan KTA 50 G3
ItemSpecCapacityPart #Interval
Air filter— find
Fuel filter— find
Oil filter— find
Belt— find
Coolant440.0 l—
Oil177.0 l—

Common questions

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

The Cummins/Onan DFLC is rated 1250 kW standby (1563.0 kVA).

What engine does the Cummins/Onan DFLC use?

The Cummins/Onan DFLC is powered by the Cummins/Onan KTA 50 G3 engine.

What fuel does the Cummins/Onan DFLC use?

The Cummins/Onan DFLC runs on Diesel.

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

The Cummins/Onan KTA 50 G3 engine in the Cummins/Onan DFLC has an oil capacity of 254.0 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
140-3230Cleaner, 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
140-2503Bracket, Mounting1Service part / kit buy
140-2504-01Bracket, Mounting (Right Side)1Service part / kit buy
140-2504-02Bracket, Mounting (Left Side)1Service 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
F-2375A single line drawing of the prime power systemService 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
Prime0%89.0
Prime0%157.0
Prime0%222.0
Prime1%291.0
Standby0%98.0
Standby0%174.0
Standby0%249.0
Standby1%330.0
Standby100%292.677.2

Available documents

Spec sheetOperator's manualReferenceParts manualService manual

Other sets with this engine

Cummins/Onan C1250 D2R