HomeCummins/OnanCummins/Onan C38 D5

Cummins/Onan C38 D5 Generator Set

The Cummins/Onan C38 D5 is a 24 kW (30.4 kVA) Diesel standby generator set powered by a Cummins/Onan C38 D5 engine. It is available at 50 V and 208 V, 3-phase and 50 Hz. It holds about 6.8 L (1.8 gal) of oil and 26 L (6.9 gal) of coolant, with a maximum ambient rating of 50 °C. The set measures 1753×930×1238 mm (69.0×36.6×48.7 in) and weighs about 778 kg (1715 lb). An integrated tank holds 170 L (44.9 gal).

24 kW
Standby
3.3 L
Displacement
6.8 L
Oil capacity
3
Document types

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

Specifications

FuelDiesel
Frequency50.0 Hz
Standby power24 kW
Standby kVA30
Prime power28 kW
ControllerPowerCommand 1301, PowerStart
Oil capacity6.8 L
Voltage options50 V, 60 V, 208 V, 190 V, 380 V, 416 V
Phase3-phase and single phase
Power factor1.0
Battery voltage12 V
Coolant capacity26 L
Max ambient50 °C
Dimensions (L×W×H)1753×930×1238 mm
Dry weight743 kg
Fuel tank170.0 L

Engine

Cummins/Onan C38 D5
Displacement3.3 L
Aspirationnaturally aspirated

Filters & service parts

model family
ItemSpecCapacityPart #Interval
Air filter find
Fuel filter find
Oil filter find
Belt find
Coolant
Oil

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.

Common questions

What is the power rating of the Cummins/Onan C38 D5?

The Cummins/Onan C38 D5 is rated 24 kW standby (30.4 kVA).

What engine does the Cummins/Onan C38 D5 use?

The Cummins/Onan C38 D5 is powered by the Cummins/Onan C38 D5 engine.

What fuel does the Cummins/Onan C38 D5 use?

The Cummins/Onan C38 D5 runs on Diesel.

Troubleshooting

16

Fault codes

CodeMeaningCauseRemedy
81 uGenerator set output frequency cannot be maintained.
59High AC voltage shutdown (Output voltage on any phase exceeds pre-set values).
27Low AC voltage shutdown (Voltage on any phase has dropped below a preset value).
96Lamp: ShutdownIndicates that the engine oil temperature is above normal and has reached the shutdown trip point.
202Lamp: WarningIndicates engine is operating near cooling system capacity (monitor condition). Increase in load or higher ambient temperature may cause High Coolant Temp (1) shutdown.Review code 1 correction list for other possible causes.

Symptoms & remedies

SymptomCauseRemedy
Output voltage on any phase exceeds pre-set values.Values adjustable from 105-125% of nominal voltage, with time delay adjustable from 1-10 seconds. Default value is 110% for 5 seconds.
Voltage on any phase has dropped below a preset value.Adjustable over a range of 50-95% of voltage, time delay 2-20 seconds. Default value is 90% for 5 seconds.
Low oil pressure or high coolant temperatureThe control (with graphical display) will light a yellow Warning lamp or a red Shutdown lamp and display a message on the graphical display. A control without the graphical display indicates a shutdown condition by intermittent flashing of the status indicator.
Unexpected start-up or failure to crankRemote inputVerify that the remote input is not causing the symptom or isolate the control from these inputs before troubleshooting the control.
Equipment damage due to wrong calibration fileDo not swap Baseboards from another genset model and only use the calibration file shown on the nameplate.
Features not available for troubleshooting base boardConfirm that the feature is installed and enabled prior to trouble-shooting the base board for symptoms related to a feature.
Shutdown conditionMake sure that parameter adjustments and time delays, related to the fault condition, have been appropriately set for the application. It may be necessary to write the initial capture file to the device or update the calibration file.
Shutdown or unexpected start-upPress the button to switch to the Off mode. Turnoff or remove AC power from the battery charger. Remove the negative (–) battery cable from the generator set starting battery.
L not start in remote mode, but starts in manual mode.The remote start switch or configurable wiring is faulty.Reset the control. Attempt to start, and check for ground at TB1-11. If ground level is not present, isolate to the remote switch or configurable wiring. Repair as necessary. If ground is present, go to next step.
The menu display Auto button, harness or the Base board is bad.Check for continuity between P11-16 (AUTO) to P11-8 (GND). If no continuity when pressing the menu display Auto button, isolate to front membrane panel or wiring harness. If there is continuity, the Base board is bad.
Increase in load or higher ambient temperature may cause High Coolant Temp (1) shutdown.Review code 1 correction list for other possible causes.

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

Parts

35
Part #DescriptionQtySystem
0193-0430-01Switch-Pressure1Sensor PartsGeek yemparts $67.75
0193-0432Thermostat1Thermostat PartsGeek
0502-1507Adapter-Hose (Oil)1Hose PartsGeek
0100-3922Engine-B3.3G11Service part / kit PartsGeek
0155-4215Guard-Exhaust (Support)2Service part / kit PartsGeek
0155-4311-02Guard-Exhaust1Service part / kit PartsGeek
0320-1981-01Accessories-CB (SD Contact)1Service part / kit PartsGeek
0320-1981-02Accessories-CB (Shunt Trip)1Service part / kit PartsGeek
0320-2225-01Accessories-CB (Shunt Trip)1Service part / kit PartsGeek
0320-2225-02Accessories-CB (SD Contact)1Service part / kit PartsGeek
0331-0618-02Locknut Conduit2Service part / kit PartsGeek
0332-4001-01Rail-Terminal Block (300mm)1Service part / kit PartsGeek
0337-3583-04Strap-Ground2Service part / kit PartsGeek
0338-4487Harness-Engine (Mechanical governor)1Service part / kit PartsGeek
0338-4720Harness-Engine (Electronic governor)1Service part / kit PartsGeek
0338-4819-02Harness AC1Service part / kit PartsGeek
0338-4819-03Harness AC1Service part / kit PartsGeek
0504-0264-01Valve-Hydraulic (Oil)1Service part / kit PartsGeek
0505-0019Bushing-Reducer1Service part / kit PartsGeek
0505-2235Adaptor-Pipe1Service part / kit PartsGeek
0526-0399-56Washer-Flat (M5)2Service part / kit PartsGeek
0526-0399-60Washer-Flat (M8)4Service part / kit PartsGeek
0526-0399-62Washer-Flat (M10)2Service part / kit PartsGeek
0800-0309-93Screw-Hex Head (M5)2Service part / kit PartsGeek
0800-3017-19Screw-Hex Head (M8 X 20)2Service part / kit PartsGeek
0800-3017-35Screw HHC (M10)1Service part / kit PartsGeek
0800-3017-37Screw-Hex Head (M10 X 25)2Service part / kit PartsGeek
0850-0114-52Washer-Lock (M5)2Service part / kit PartsGeek
0850-0114-54Washer-Lock (M8)2Service part / kit PartsGeek
0850-0114-55Washer-Lock (M10)2Service part / kit PartsGeek
0862-0026-55Nut-Hex (M8)2Service part / kit PartsGeek
0862-0026-56Nut Hex (M10)1Service part / kit PartsGeek
0872-0020-01Standoff2Service part / kit PartsGeek
0872-0021Standoff1Service part / kit PartsGeek
961-0518(Issue1)1Service part / kit 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
Prime0%3.10.8
Standby
Standby0%3.20.8

Available documents

Spec sheet — 0058677 (Cummins/Onan)Spec sheet — Cummins-C38D5-Generator-Data-Sheet (Cummins/Onan)Spec sheet — Cummins-C38D5-Spec-Sheet (Cummins/Onan)Spec sheet — SS23-CPGKParts manual — 906-0103 Cummins C22D5 C25D6 C30D6 C33D5 Parts (8-2006) (Cummins/Onan)Service manual — C3xDx Generator Service Manual (Cummins/Onan)