The Cummins/Onan MDKD is a 7 kW (9 kVA) Diesel standby generator set. It is available at 110 V, 220 V, 115 V, 230 V, 120 V and 240 V, 1-phase, 50 Hz and rated 241.7 A. It holds about 3.8 L (1.0 gal) of oil and 13.7 L (3.6 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses battery rated 360 CCA at 12 V. The set measures 823×479×560 mm (32.4×18.9×22.0 in) and weighs about 238 kg (525 lb).
What is the power rating of the Cummins/Onan MDKD?
The Cummins/Onan MDKD is rated 7 kW standby (9.0 kVA).
What fuel does the Cummins/Onan MDKD use?
The Cummins/Onan MDKD runs on Diesel.
Troubleshooting
24
Fault codes
Code
Meaning
Remedy
A052J727 (Issue 1)
The screen will display a description of the fault, the numeric fault code, and the hour the fault occurred in total generator set running time (see figure below).
Refer to Section 6.4 on page 60 to diagnose and correct the problem.
No Code - No Response at Digital Display or Control Switch
No Code - No Response at Digital Display or Control Switch
No Code - Starter Engages and Disengages
No Code - Starter Engages and Disengages
No Code - Starting Batteries do not Maintain a Charge
No Code - Starting Batteries do not Maintain a Charge
No Code - No AC Power When Generator Set is Running
No Code - No AC Power When Generator Set is Running
Code No. 1
Code No. 1 - High Engine Temperature
Code No. 2
Code No. 2 - Low Oil Pressure
Code No. 3
Code No. 3 - Service Check
Code No. 4
Code No. 4 - Overcrank
Code No. 5
Code No. 5 - Warning Shutdown due to CO
Code No. 7
Code No. 7 - Loss of Raw Water Flow
Code No. 12
Code No. 12 - High AC Voltage
Code No. 13
Code No. 13 - Low AC Voltage
Code No. 14
Code No. 14 - High AC Frequency
Code No. 15
Code No. 15 - Low AC Frequency
Code No. 22
Code No. 22 - Governor Overload
Code No. 23
Code No. 23 - Faulty Oil Pressure Sender
Code No. 24
Code No. 24 - Faulty Temperature Sender
Code No. 27
Code No. 27 - Loss of AC Voltage Sense
Code No. 29
Code No. 29 - High Battery Voltage
Code No. 32
Code No. 32 - Starting Fault
Symptoms & remedies
Symptom
Cause
Remedy
Press BACK to return to GEN STATUS in order to monitor engine temperature and oil pressure. Service the generator set as required.
The PRE-ALARM status lamp will blink when the engine oil pressure or engine temperature approaches its engine shutdown limit.
Press BACK to return to GEN STATUS.
To adjust the brightness or contrast of the digital display screen, press SCREEN on any GEN STATUS screen, then NEXT to toggle between Brightness and Contrast.
DC Control
Low oil pressure, high coolant temperature, high exhaust temperature and overspeed (option)
The fault breaker trips and stops the genset. See Figure 3-2.
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.