Faults and Elimination Methods for Emergency Diesel Generator

Emergency Diesel Generator Faults

Fault	Fault characteristics and causes	Elimination method
Oil pressure alarm shutdown	Pressure sensor broken	Replace the pressure sensor
	Poor quality of lubricating oil	Replace the lubricating oil
	Oil filter is dirty	Replace the oil filter
	Pressure valve failure	Repair or replace pressure valves
	Oil pump failure	Replace the oil pump
	Insufficient oil	Add oil
High water temperature alarm and stop	Insufficient cooling water	Add cooling water, the cooling water must be distilled water
Engine cannot start	Water temperature sensor is broken	Replace the water temperature sensor
	Tubing has air	Check, exhaust air
	Tank valve is not open	Open the oil tank valve
	Oil tank without oil	Add fuel
	Poor fuel quality	Replace the fuel
	Starter motor failure	Replace the starting motor
	Insufficient battery capacity	Charge the battery
	Battery terminal oxidation, poor contact	Rust removal, fasten battery connection bolt
	High pressure oil pump failure	Repair or replace the oil pump
	Air filter is blocked	Replace or clean air filter
Diesel engine power	Fuel line, fuel filter into air or blocked	Remove air or replace fuel filter cartridge
	Fuel injection pump does not atomize oil	Check for repair or replacement of coupling parts
	The generator body is overheated, the ambient temperature is too high, the   temperature of the oil and cooling water is high, and the discharge temperature is also greatly increased.	Check the cooler and radiator to remove scale; check if the pipe diameter is toosmall. If the ambient temperature is too high, the ventilation should be improved to improve the cooling effect.
There is abnormal noise when the diesel engine is running.	The transmission gear is worn and the tooth gap is too large; the front cover   emits an abnormal sound, and when the engine suddenly drops, the impact sound can be heard.	Adjust the backlash and replace the gear according to the wear condition
	Inlet   and the exhaust valve clearance is too large, and a loud rhythmic noise is heard at the cylinder head.	Recalibrate the valve clearance
	There is no oil between the rocker arm adjusting screw and the spherical seat of the push rod. The "squeak" of dry friction is heard at the cylinder.	Add oil
Exhaust black smoke	Air filter blocked, intake air blocked	Check and clean the air filter
	The fuel supply of each cylinder is uneven.	Adjust the fuel injection pump
	Incorrect valve clearance and poor valve seal	Adjust the valve clearance, check the sealing cone, and eliminate the defects
Exhaust white smoke	The atomization of injector is poor, there is oil drop phenomenon, and the injection pressure is insufficient.	Check the nozzle couplings for grinding or replacement, and re-adjust the injection pressure to the specified range
	Incomplete combustion in individual cylinders when the engine is just started	Increase the speed and load properly, and run more time.