Why is my Cummins generator not starting？
As a common backup power supply, Cummins generator sets have been widely used in factories, schools, hospitals, hotels, real estate and so on. But sometimes, we will find that the Cummins diesel generator is difficult to start or can not start, which is really a troublesome problem. Then let Huali give you an analysis of the reasons for this, hoping to answer your doubts.
Under normal circumstances, Cummins diesel generator manufacturers believe that when the diesel engine can not start, you need to find the reasons from the following aspects.
1. Electrical failure
(1) Check whether the battery voltage reaches the rated voltage of 24V
Because the generator is usually in the automatic state, the electronic control module ECM monitoring the status of the entire genset and the contact between the EMCP control panel are maintained by battery power supply. When the external battery charger fails, the battery power cannot be replenished and the voltage drops. Charge the battery. The charging time depends on the discharge of the battery and the rated current of the charger. It is recommended to replace the battery in an emergency.
(2) Check whether the battery terminal is in bad contact with the connecting cable
Cummins generator battery electrolyte in the usual maintenance if added too much, which is easy to overflow the surface corrosion of the battery terminal increases the contact resistance so that the cable connection is poor. In this case, sandpaper can be used to polish the terminal and the corrosion layer of the cable joint, and then re-tighten the screw to fully contact it.
(3) Whether the positive and negative cables of the starting motor are not well connected, which causes vibration when the generator is running and loosens the wiring, resulting in poor contact
The probability of starting motor failure is less, but it cannot be ruled out. To judge the action of the starting motor, you can touch the shell of the starting motor by hand at the moment of starting the engine. If the starting motor is inactive and the shell is cold, it indicates that the motor is not moving. Or the starting motor is seriously hot, there is a burnt taste, the motor coil has been burned. It takes a long time to repair the motor.
2. Fuel system failure
(1) There is air in the fuel system
This is a more common failure for Cummins generator, which is usually caused by improper handling of the fuel filter element when replacing it. After the air enters the pipeline with the fuel, the fuel content in the pipeline is reduced, and the pressure is reduced, resulting in the engine failing to start. In this case, it needs to perform exhaust treatment
(2) Fuel filter failure
Long-term use of the fuel filter will block the filter, resulting in the fuel not flow. Fuel filter needs to be replaced.
(3) Fuel injection nozzle failure
Clogged or damaged fuel injectors can also prevent the generator from starting. It needs to check whether the nozzle is normal, if there is a fault , which is need to be replaced or repaired.
3. Mechanical transmission failure
(1) The generator drive belt falls off: the generator drive belt may fall off, causing the generator to fail to rotate. It is necessary to check whether the belt is seriously worn or loose. If there is a fault, it needs to be replaced or adjusted.
(2) Generator mechanical structure failure: there is failure of the internal mechanical structure of the generator, such as serious gear wear or bearing aging, which will cause the generator to fail to start. It is necessary to check whether the internal mechanical structure of the generator is normal, and if there is a fault, it needs to be replaced or repaired in time.
4. The ambient temperature is too low
In the case of low temperature, the preheating of Cummins diesel generator should be done, otherwise it is not easy to start.
Before starting the Cummins generator, the following preparations need to be done:
1. Check whether the Cummins generator is in normal working condition, including oil, water and electrical inspection.
2. Check whether there are dangerous items around the engine, such as cleaning oil, debris, etc.
3. Check whether the exhaust pipe of the generator is unblocked.
Master the correct Cummins generator startup and shutdown procedures
1. Check whether the generator is powered off.
2. Open the control cabinet door of the Cummins generator, and open the battery main switch, control standby switch and control motor switch in order.
3. Press the Preheat button on the control panel to start the preheat operation.
4. Wait for the indicator to light up and press the "Start" button to start the engine.
5. After the engine starts, adjusting the current to the specified value on the operating panel at the top of the generator and keep it for a period of time to make the generator run smoothly.
6. After the operation is complete, press the "Stop" button on the control panel, and then press the "Shutdown" button to complete the shutdown operation.
The above is Huali for you to introduce the simple analysis of the reasons for Cummins diesel generator not start and the start and stop operation steps, If you have any questions and need to know about this, you are welcomed to come to consult, we will have a professional engineer to explain to you.
