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Cummins/Onan C20D6T Generator Set

The Cummins/Onan C20D6T is a 14.8 kW (17.9 kVA) Diesel standby generator set powered by a Cummins/Onan C20D6T engine. It is available at 240/416 V, 220/380 V, 230 V and 240 V, 3-phase and 50 Hz. Starting uses 65 group-65 batteries at 12 V. The set measures 2180×987×2006 mm (85.8×38.9×79.0 in) and weighs about 1408 kg (3104 lb). An integrated tank holds 150 L (39.6 gal).

14 kW
Standby
2.5 L
Displacement
1
Document types

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

Specifications

FuelDiesel
Frequency50.0 Hz
Standby power14 kW
Standby kVA17
Prime power14 kW
ControllerPowerCommand 1.1, PowerStart 0600 OR PowerCommand 1.1
Voltage options240/416 V, 220/380 V, 230/400 V, 230 V, 240 V
Phase3Ø,1Ø,3Ø,1Ø
Battery group65
Battery voltage12 V
Battery quantity65
Dimensions (L×W×H)2180×987×2006 mm
Dry weight1408 kg
Fuel tank150.0 L

Engine

Cummins/Onan C20D6T
Displacement2.5 L
AspirationDirect injection

Maintenance & consumables

for the Cummins/Onan C20D6T
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 C20D6T?

The Cummins/Onan C20D6T is rated 14 kW standby (17.9 kVA).

What engine does the Cummins/Onan C20D6T use?

The Cummins/Onan C20D6T is powered by the Cummins/Onan C20D6T engine.

What fuel does the Cummins/Onan C20D6T use?

The Cummins/Onan C20D6T runs on Diesel.

Troubleshooting

6

Fault codes

CodeMeaning
59High AC voltage shutdown
27Low AC voltage shutdown
81 uUnder frequency shutdown
81 oOver frequency shutdown/warning
51High Current warning/shutdown

Symptoms & remedies

SymptomCause
Battery voltage warningStatus of battery charging system (failure)

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

Fuel consumption

RatingLoadL/hgal/h
Prime
Standby

Available documents

Spec sheet — EMERS-5627-EN (Cummins/Onan)Spec sheet — EMERS-5671-EN (Cummins/Onan)