The Reasons Why the Genset Fails to Start

Principais Falhas no Arranque de um Gerador

The Reasons Why the Genset Fails to Start

Preventive maintenance is very important to prevent failures on the genset functioning. However, an unexpected failure can happen for several reasons.

Below we present the main reasons why the genset fails to start:

  • Battery failure

Most of the failures on the genset startup are related to the battery. A significant percentage of this fault is due to the accumulation of lead sulfate in the battery plates which ends up by disabling them. The purchase of a battery without maintenance it is an option that minimizes the problem, but still, it is necessary to pay attention to the manufacturer guidelines to its maintenance or replacement.

  • Air in the fuel system

When there is a genset that doesn’t work for a long period, it’s possible that there is some air entrance which leads to a failure on the equipment startup. To avoid this problem, it is important to make weekly tests to the generator. By having this habit, it will help to keep the good functioning of the equipment and avoid possible failures ahead.

  • Fuel leakage

The fuel leakages can occur in systems without periodic maintenance or that are exposed to time actions in inadequate locations. This can cause cracks in hoses and valves where the fuel passes. The fuel leakage can cause the previous problem we mentioned above of the air in the system, which causes even more failures on the genset.

  • Carbonization

The gensets with a diesel engine are generally projected to operate with a load of 70% to 80% of output power. This is the best way to guarantee the efficiency of the system. The gensets that work under load for a long period accumulate fuel waste in the shape of carbonized particles and other wastes like oil, condensed water, and other acids. To clean the system and avoid failures in the genset it is recommended that the engine runs in full load during a period so that it can burn the excess of fuel.

  • Problems with circuit breakers and/or fuses

In the case of a genset failure due to an unarmed circuit breaker or a burned fuse, first, you need to figure it out the reason why so that in this way you can act against the problem and solve it. To force the rearmament of the circuit breaker or to replace the fuse can cause serious damage to the system that acted in a prevented way to protect the genset from overload, short-circuit power or other risks.

Hugo Luís
Technical Assistance and Support Manager 

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