What are the general troubleshooting methods for Diesel generator set

Generator Set general troubleshooting

1. After pressing the start button, the unit does not respond or rotates very slowly

1. Possible cause: The starting battery is insufficient

Starter battery connection and plug loose

Intermediate relay failure

starter motor failure

2. Processing method: check the charge of the starting battery

Check and fasten the starter battery wire and plug

Check whether the intermediate relay works normally

overhaul starter motor

2. The engine can rotate to a certain speed, but cannot ignite

1. Possible cause: No oil is ejected from the fuel injector (poor fuel supply)

Fuel system leaks air

The injection time of the fuel injection pump is inaccurate or the fuel injection pump is faulty

2. Treatment method: check whether there is air leakage or blockage in the oil circuit from the daily fuel tank to the fuel injection pump

Open the exhaust screw to check the oil outlet

Retry fuel injection

Replace fuel injection pump and try again

3. Shut down after starting

1. Possible reasons: poor oil circuit, clogged filter, failure of oil pump

Air filter heavily clogged

Fuel injector failure

temperature is too low

2. Treatment method: Check the smoothness of the oil circuit, replace the diesel filter if necessary, check the air filter, and replace it if necessary

Adjust fuel injectors, replace if necessary

4. The Generator Set engine is not working properly

4.1 black smoke

1. Possible cause: The air filter is seriously blocked

Wrong grade of fuel

Exhaust back pressure too high

Injection pump failure

fuel injector bite

Insufficient engine cylinder compression

2. Treatment method: check the air filter and replace it if necessary

Check fuel quality (use Chinese light 0# diesel)

Check the fuel supply of the fuel injection pump and readjust

Check the atomization condition of the fuel injector

Check whether the cylinder compression force is normal

4.2 Blue smoke or white smoke

1. Possible reasons: Improper selection of lubricating oil grade, excessive oil level

Short startup time, engine temperature is too low

Worn piston rings, supercharger failure

2. Treatment method: Check whether the lubricating oil is too thin, and check whether the oil level is within the specified range

No need to deal with, the unit can run for a little longer

Check the gap between the piston ring and the cylinder and the gap between the piston ring groove and whether the supercharger is working normally

4.3 Engine running unstable

1. Possible reasons: poor oil supply or air in the oil circuit

Fuel injection pump or injector failure

Air filter partially clogged

2. Treatment method: Check whether the oil circuit is unobstructed, whether the oil pipe joint is loose, whether the fuel filter is blocked, check the fuel injection timing of the fuel injection pump, whether the fuel pump rack is flexible, and check the atomization status of the fuel injector nozzle to check the cleanliness of the air filter Condition

4.4 There is abnormal sound in the engine

1. Possible reasons: Improper choice of fuel grade or poor fuel quality

Fuel injection timing

Fuel injector failure

2. Treatment method: check the fuel grade or add reliable diesel and restart

check fuel injection timing

Check whether the fuel injector is normal

4.5 Insufficient engine power

1. Possible reason: poor oil supply in the oil circuit

The high pressure pump is not working properly

The fuel injector is not working properly

air intake system blocked

2. Treatment method: Check whether the oil circuit is smooth, whether the oil pipe joint is loose, and whether the fuel filter is blocked

Check and adjust the high pressure oil pump

Check and replace fuel injectors

Check, clean or replace the air filter

 4.6 Lubricating oil pressure is too low or too high

1. Possible reason: SAE value of lubricating oil is incorrect

Lubricating oil pressure gauge display is not accurate

oil filter clogged

2. Treatment method: check whether the grade of lubricating oil is correct

Replace pressure gauge and pressure sensor

Check or replace oil filter

 4.7 Water temperature is too high

1. Possible cause: The exhaust cooling system is abnormal

Injection timing of fuel injection pump

Long time overload operation

2. Treatment method: Check whether the water pump is working normally, whether the thermostat can be opened, check whether the outside of the water tank is blocked, correct the tightness of the fan belt and fuel injection timing, and check whether the load is reasonable