HomeCummins/OnanCummins/Onan DFAC

Cummins/Onan DFAC Generator Set

The Cummins/Onan DFAC is a diesel generator set powered by a Cummins/Onan LTA10 engine. It operates at 60 Hz. It holds about 36 L (9.5 gal) of oil and 49 L (12.9 gal) of coolant. Starting uses 2 group-8 batteries rated 1400 CCA at 12 V. The same LTA10 engine also powers generator sets from AKSA.

36.0 L
Oil capacity
5
Document types

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

Specifications

Fueldiesel
Frequency60.0 Hz
ControllerDetector, PowerCommand 3100, PowerCommand 3100 (PCC)
Oil capacity36.0 L
Battery group8D
Battery cranking1400 CCA
Battery voltage12 V
Battery quantity2
Coolant capacity49 L

Engine

Cummins/Onan LTA10
Oil capacity36.0 L
Coolant capacity51.0 L

Maintenance & consumables

for the Cummins/Onan LTA10
ItemSpecCapacityPart #Interval
Air filter find
Fuel filter find
Oil filter find
Belt find
Coolant49.0 L
OilCummins engine Operation and Maintenance Manual36.0 L

Common questions

What engine does the Cummins/Onan DFAC use?

The Cummins/Onan DFAC is powered by the Cummins/Onan LTA10 engine.

What fuel does the Cummins/Onan DFAC use?

The Cummins/Onan DFAC runs on diesel.

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

The Cummins/Onan LTA10 engine in the Cummins/Onan DFAC has an oil capacity of 36.0 liters.

Troubleshooting

24

Fault codes

CodeMeaningCauseRemedy
221Shutdown lamp lights. Engine will not crank.Indicates possible fault with control or starting system. Check for the following conditions: a. Poor battery cable connections. Clean the battery cable terminals and tighten all connections. b. Discharged or defective battery. Recharge or replace the battery. c. Contact an authorized service center for service of starter and start- ing system.
222Shutdown lamp lights. Engine stops cranking.A. Check for empty fuel tank, fuel leaks, or plugged fuel lines and correct as required. b. Check for dirty fuel filter and replace if necessary. c. Check for dirty or plugged air filter and replace if necessary. d. Reset the control and restart after correcting the problem. Contact an authorized service center if none of the above.
223Shutdown lamp lights. Engine runs and then shuts down.Indicates engine has exceeded normal operating speed. (2070 rpm @ 60 hz; 1800 rpm @ 50 hz) Contact an authorized service center.
230Warning lamp lights. MESSAGE: LOW DC VOLTAGEA. Discharged or defective battery. Check the battery charger fuse. Recharge or replace the battery. b. Poor battery cable connections. Clean the battery cable terminals and tighten all connections. c. Contact an authorized service center if none of the above.
231Warning lamp lights. MESSAGE: HIGH DC VOLTAGEContact an authorized service center.
232Warning lamp lights. MESSAGE: WEAK BATTERYDischarged or defective battery. See Warning message 230, LOW DC VOLTAGE.
240Warning lamp lights. MESSAGE: LOW FUEL DAYCheck fuel supply and replenish as required.
241Warning lamp lights. MESSAGE: LOW FUELCheck fuel supply and replenish as required.
250Shutdown lamp lights. MESSAGE: EEPROM ERRORIndicates PCC memory error. Data corruption of critical operating parameters. Contact an authorized service center.
251 - WARNING or 252 - WARNINGWarning lamp lights. MESSAGE: EEPROM ERRORIndicates PCC memory error. Data corruption of noncritical operating parameters. Contact an authorized service center.
260 - SHUTDOWN or 261 - SHUTDOWN or 262 - SHUTDOWN or 263 - SHUTDOWNShutdown lamp lights. MESSAGE: CUSTOMER FAULT 1 or GROUND FAULT or RUPTURE BASIN or HIGH GEN TEMPWhen any one of these customer defined inputs is closed to ground, the corresponding fault message is displayed. The nature of the fault is an optional customer selection. These fault functions can be programmed to initiate a shutdown or a warning. As indicated by the Shutdown lamp, a shutdown response has been preselected. Contact an authorized service center.
301Shutdown lamp lights. MESSAGE: HIGH AC VOLTAGEIndicates that one or more of the phase voltages has exceeded 130% of nominal, or has exceeded 110% of nominal for 10 seconds. Contact an authorized service center.
303Shutdown lamp lights. MESSAGE: LOW AC VOLTAGEIndicates that one or more of the phase voltages has dropped below 85% of nominal for 10 seconds. Contact an authorized service center.
313Shutdown lamp lights. MESSAGE: UNDER FREQUENCYIndicates that engine speed has dropped below 90% of nominal for 10 seconds. NOTE: Five seconds before shutdown, a Load Dump signal is initiated. Contact an authorized service center.
320Warning lamp lights. MESSAGE: OVERCURRENTIndicates that generator output current has exceeded 110% of rated for 60 seconds. Contact an authorized service center.
321Shutdown lamp lights. MESSAGE: OVERCURRENTIndicates that generator output current has exceeded 110% of rated, and that a PCC time/current calculation has initiated an overcurrent shutdown. Contact an authorized service center.

Symptoms & remedies

SymptomCauseRemedy
Shutdown lamp lights.MESSAGE: EMERGENCY STOP 102 − SHUTDOWN Engine shuts down and will not crank. Indicates local or remote Emergency Stop. To reset the local Emergency Stop button : Pull the button out or turn the switch clockwise (button with arrow) and allow it to pop out. Move the Run/Off/Auto switch to Off. Press the Reset switch. Select Run or Auto, as required.
PCC continuously monitors engine sensors for abnormal conditions such as low oil pressure and high coolant temperature.If any of these conditions occur, the PCC will light a yellow Warning lamp or a red Shutdown lamp and display a message on the digital display panel.
Shutdown fault (red Shutdown lamp) occurs.The PCC will stop the engine and close a set of contacts that can be wired to trip a circuit breaker. The operator can restart the set after making adjustments or corrections.
Warning Status Indicator: This yellow lamp is lit whenever the control detects a warning condition.After the condition is corrected, warning indicators can be reset by pressing the Reset switch. In auto mode, warning indicators can also be reset by cycling the remote reset input after the condition is corrected.
Shutdown Status Indicator: This red lamp is lit whenever the control detects a shutdown condition.After the condition is corrected, shutdown indicators can be reset by turning the Run/Off/Auto switch to the Off position and pressing the Reset switch. In auto mode, shutdown faults can be reset by removing the remote start input and then cycling the remote reset input.
Emergency Stop shutdown status (Code 102) occurs.This status can only be reset at the PCC front panel.
Excessive Axial alignment will cause more generator vibration than Angular misalignment.Axial misalignment is the result of the generator shaft axis not aligning with engine crankshaft axis. The tolerances in the bolted flywheel and drive disc connection may add up to displace the generator axially relative to the crankshaft axis.
If the assembly is allowed to run under these conditions, the discs must flex in alternate directions twice for each engine revolution. It is important to minimize the amount of disc flexing since, if it is excessive, the drive disc will crack.Angular misalignment is the result of the generator bearing center axis not aligning with axis of the engine crankshaft. This condition creates an angle between the generator shaft axis and the crankshaft axis. The cause of this type of misalignment is usually shimming error.

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

Parts

12
Part #DescriptionQtySystem
0300-4623-05DFAA (600V)1Current transformer PartsGeek
0300-4623-06DFAB (600V)1Current transformer PartsGeek
0300-4623-07DFAC (600V)1Current transformer PartsGeek
0300-4623-17DFAA BR (0-480V)1Current transformer PartsGeek
0300-4623-19DFAB BR (0-480V)1Current transformer PartsGeek
0300-4623-21DFAC BR (0-480V)1Current transformer PartsGeek
960-0167Battery, Group Number: 8D, CCA (minimum): 1400, Cold Soak® -40°F (-40°C)2Battery PartsGeek
A40-TB1-2SWITCHED B+Belt PartsGeek
A40-TB1-4GROUNDBelt PartsGeek
A40-TB1-7COMMON ALARMBelt PartsGeek
A40-TB1-8JUMPER WIREBelt PartsGeek
LF3000Lube, Spin-On1Oil filter Amazon eBay $104.99 PartsGeek

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
Standby
Standby100%52.713.9

Available documents

Spec sheet — Cummins-installation-manual-DFAA-DFAB-DFAC-DFBC-DFBF-DFBD-DFBE-DFBF-DFCB-DFCC-DFCE-DFEB-DFEC-DFED-DFFA-DFFB-DFGA-DFGB-DFGC-DFJA-DFJB-DFJC-DFJD-DFLA-DFLB-DFLC-DFLD-DFLE-DFMB-DQAA-DQAB-DQBA-DQBB (Cummins/Onan)Spec sheet — LTA10 60HZ 203~252kw (Cummins/Onan)Operator's manual — 960-0171 Cummins DFAB DFAC Operator's Manual (12-2012) (Cummins/Onan)Operator's manual — 960-0175 Cummins DFAB DFAC Operator's Manual (2-2013) (Cummins/Onan)Reference — 9-3Parts manual — 0932-0112 Onan Post-Sale Literature Index (07-1998) (Cummins/Onan)Parts manual — 0960-0204 (Cummins/Onan)Parts manual — 960-0260 Onan DFAA DFAB DFAC Parts Catalog (6-1997) (Cummins/Onan)Parts manual — 960-0293 Cummins DFAB DFAC Parts Manual (3-2003) (Cummins/Onan)Parts manual — 960-0298 Cummins DFAB DFAC Parts Manual (12-2012) (Cummins/Onan)Service manual — 960-0167 Cummins DFAB DFAC Operator's Manual (1-2003) (Cummins/Onan)Service manual — 960-0504 Onan DFxx series Generator Control Service Manual 04-1993 (Cummins/Onan)Service manual — 960-0507C Cummins DFAA thru DFMB DQAA Service Manual (2-2004) (Cummins/Onan)Service manual — 960-0519C Cummins DFAB DFB DFC DFG DFLC Series Service Manual (2-2004) (Cummins/Onan)Service manual — 960-0619D Cummins DFA DFB DFC DFE DFF DFG DFJ DFL DFM DQA DQB Installation (6-2003) (Cummins/Onan)Service manual — 960-0631B Cummins DFAB DFAC DFBF DFCC DFCE Installation Manual (2-2004) (Cummins/Onan)Service manual — 960-0634C Cummins DFAB DFBF DFCB DFCC DFCE Installation Manual (2-2004) (Cummins/Onan)Service manual — Cummins-3100-PowerCommand-DFAA-DFAB-DFAC-DFBC-DFBD-DFBE-DFBF-DFCB-DFCC-DFCE-DFEB-DFEC-DFED-DFFA-DFFB-DFGA-DFGB-DFGC-DFJA-DFJB-DFJC-DFJD-DFLA-DFLB-DFLC-DFLD-DFLE-DFMB-DQAA-DQAB-DQBB (Cummins/Onan)Service manual — Detector Control Generator Set Service Manual (Cummins/Onan)