The Cummins/Onan HDKB is a 5 kW diesel standby generator set. It is available at 12 V and 16 V, 50 Hz and rated 41.7 A. It holds about 1.9 L (0.5 gal) of oil and 2.8 L (0.7 gal) of coolant. Starting uses battery rated 650 CCA at 12 V. The set measures 120×108×38 mm (4.7×4.3×1.5 in), weighs about 181 kg (399 lb) and produces 68 dBA at 3 m.
What is the power rating of the Cummins/Onan HDKB?
The Cummins/Onan HDKB is rated 5 kW standby.
What fuel does the Cummins/Onan HDKB use?
The Cummins/Onan HDKB runs on diesel.
Troubleshooting
17
Fault codes
Code
Meaning
Code 1
Engine Over Temperature
Code 2
Low Oil Pressure
Code 3
Service Check
Code 4
Over Crank
Code 12
Over Voltage
Code 13
Under Voltage
Code 14
Over Frequency
Code 15
Under Frequency
Code 19
Governor Actuator
Code 22
Governor Actuator Overload
Code 24
Faulty Temperature Sender
Code 27
Voltage Sense
Code 29
High Battery Voltage
Code 32
Low Cranking Speed
Code 35
Control Card Failure
Symptoms & remedies
Symptom
Remedy
The genset stops
Does the genset operate correctly from the genset controls? If it does not, the problem is in the genset, not the EC-20 controller. See the genset Operator, Installation, and Service Manuals.
The indicator light in the Start/Stop switch turns off
Confirm that the correct connection diagram (Figures 5 - 7) was used, then check EC 30 wiring connections. Confirm that the correct voltages are present on each terminal. Check all terminal connections on both ends of the wiring harness. Are harness connectors properly joined?
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
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.