1. The fuel system is faulty (1) Air enters or is blocked in the fuel filter or pipeline, which causes the oil pipeline to be blocked, the power is insufficient, and even the fire is difficult. The air entering the pipeline should be removed, the diesel filter element should be cleaned and replaced if necessary. (2) Oil leakage, seizure or poor atomization caused by the damage of the fuel injection coupler. At this time, it is easy to cause lack of cylinders and insufficient engine power. It should be cleaned, ground or replaced in time. (3) Insufficient fuel supply of the fuel injection pump will also cause insufficient power. The coupler should be checked, repaired or replaced in time, and the fuel supply of the fuel injection pump should be re-adjusted. 2. The cooling and lubrication system is faulty The overheating of the Weichai generator is caused by the failure of the cooling or lubrication system. In this case, the water temperature and oil temperature will be too high, and it is easy to cause the cylinder to be pulled or the piston ring to be stuck. When the exhaust temperature of diesel generator increases, the cooler and radiator should be checked to remove scale. 3. The cylinder head group is faulty (1) Insufficient intake air volume or mixed exhaust gas in the intake air due to exhaust gas leakage, resulting in insufficient fuel combustion and reduced power. The mating surface of the valve and the valve seat should be ground to improve its tightness, and if necessary, replace it with a new one. (2) Air leakage at the joint surface of the cylinder head and the body will cause the air in the cylinder to enter the water channel or oil channel, causing the coolant to enter the engine body. Lack of motivation. Due to the damage to the cylinder head gasket, an air flow will rush out from the cylinder head gasket during shifting, and blisters will appear on the gasket when the engine is running. At this time, the cylinder head nut should be tightened according to the specified torque or the cylinder head gasket should be replaced. (3) Incorrect valve clearance will cause air leakage, resulting in decreased engine power and even difficulty in catching fire. The valve clearance should be readjusted. (4) Damage to the valve spring will cause the valve to return difficult, the valve leaks, and the gas compression ratio is reduced, resulting in insufficient engine power. Damaged valve springs should be replaced in time. (5) Air leakage from the injector mounting hole or damage to the copper pad will result in a lack of cylinders, resulting in insufficient engine power. It should be removed for inspection and replaced with damaged parts. If the inlet water temperature is too low, the heat dissipation loss will increase. At this time, the inlet temperature should be adjusted to meet the specified value. 4. The air filter is not clean An unclean air filter will increase resistance, reduce air flow, and decrease charging efficiency, resulting in insufficient engine power. The diesel air filter element should be cleaned or the dust on the paper filter element should be cleaned as required, and the filter element should be replaced if necessary. 5. Exhaust pipe blockage Blockage of the exhaust pipe will cause the exhaust to be blocked and the fuel efficiency will decrease. Power drops. It should be checked whether the exhaust guide resistance increases due to too much carbon deposition in the exhaust pipe. Generally, the exhaust back pressure should not exceed 3.3Kpa, and the carbon deposits in the exhaust pipe should be cleaned frequently. 6. The fuel supply advance angle is too large or too small If the fuel supply advance angle is too large or too small, it will cause the fuel injection time of the fuel pump to be too early or too late (the fuel injection time is too early, the fuel combustion will be insufficient; The process is not in good shape. At this time, check whether the screw of the fuel injection drive shaft adapter is loose. If it is loose, adjust the fuel supply advance angle according to the requirements and tighten the screw. 7. Piston and cylinder liner strain Due to the serious strain or wear of the piston and the cylinder liner, and the increase of friction loss caused by the glued piston ring, the mechanical loss of the engine itself increases, the compression ratio decreases, the ignition is difficult or the combustion is insufficient, the lower air charge increases, and the leakage Severe gas. At this time, the cylinder liner, piston and piston rings should be replaced. 8. The surface of connecting rod bearing bush and crankshaft connecting rod journal is biting The occurrence of this situation will be accompanied by abnormal sound and oil pressure drop, which is caused by blocked oil passage, damaged oil pump, blocked oil filter element, or low oil hydraulic pressure or even no oil. At this time, the side cover of the Weichai generator can be removed, and the side and clearance of the connecting rod big end can be checked to see if the connecting rod big end can move forward and backward. At this time, for the supercharged diesel generator, in addition to the above reasons, the power will be reduced, if the supercharger bearing is worn, the intake pipe of the press and turbine is blocked by dirt or leaks, the diesel generator can also be damaged. Power drops. When the above situation occurs in the supercharger, the bearings should be overhauled or replaced, the intake pipe and the casing should be cleaned, the impeller should be cleaned, and the joint nuts and clamps should be tightened.1. The installation site should be well ventilated, the generator end should have enough air inlet, and the diesel engine end should have good air outlet. The area of ​​the air outlet should be more than 1.5 times larger than the area of ​​the water tank. 2. The surroundings of the installation site should be kept clean, and items that can generate acid, alkali and other corrosive gases and vapors should be avoided. Where possible, fire extinguishing devices should be provided. 3. For indoor use, the exhaust pipe must be led outdoors, the diameter of the pipe must be greater than or equal to the diameter of the exhaust pipe of the muffler, and the connected pipes should not have more than 3 elbows to ensure smooth exhaust. It is inclined downward by 5-10 degrees to avoid rainwater injection; if the exhaust pipe is installed vertically upwards, a rain cover must be installed. 4. When the foundation is made of concrete, the horizontality must be measured with a level ruler during installation, so that the unit can be fixed on a horizontal foundation. There should be special shock-proof pads or foot bolts between the unit and the foundation. 5. The casing of the unit must have a reliable protective grounding. For generators that need to be directly grounded at the neutral point, the neutral grounding must be carried out by professionals and equipped with lightning protection devices. It is strictly forbidden to use the grounding device of the mains for neutral point ground directly. 6. The two-way switch between the generator and the mains must be very reliable to prevent reverse power transmission. The wiring reliability of the two-way switch needs to be checked and approved by the local power supply department.