1、沼氣發電機組啟動電池故障，電池長時間未維修。 電解液水分揮發后，不能立即補充。 沒有配置啟動電池充電器，電池長時間自然放電后電量下降，使用的充電器需要人工定期進行均充更換。 由于疏于更換操作，蓄電池電量達不到要求，解決此問題除配置高質量充電器外，還需要必要的檢查維護。

1. The start-up battery of the biogas generator set has malfunctioned and the battery has not been repaired for a long time. After the electrolyte moisture evaporates, it cannot be replenished immediately. There is no configuration to start the battery charger, and after a long period of natural discharge, the battery level drops. The charger used needs to be manually replaced regularly for even charging. Due to negligence in replacement operations, the battery level does not meet the requirements. To solve this problem, in addition to configuring a high-quality charger, necessary inspection and maintenance are also required.

2、水進入柴油發動機，空氣中水氣因溫度變化發生冷凝現象，結成水珠附著在油箱內壁，流入柴油，柴油含水量超標，此類柴油進入發動機高壓油泵，精密切割。

2. Water enters the diesel engine, and the water vapor in the air condenses due to temperature changes, forming water droplets that adhere to the inner wall of the fuel tank and flow into the diesel. The water content of the diesel exceeds the standard, and this type of diesel enters the high-pressure oil pump of the engine for precise cutting.

3、機油保用期(兩年)動機油是機械潤滑作用，但機油也有一定的保用期，長時間儲存后，機油的物理化學性能會發生變化，導致機組運行時潤滑狀況惡化，容易引起機組零部件損壞，潤滑油定期更換。

3. The warranty period of engine oil (two years) is for mechanical lubrication, but engine oil also has a certain warranty period. After long-term storage, the physical and chemical properties of engine oil will change, leading to deterioration of lubrication conditions during unit operation, which can easily cause damage to unit components. Lubricating oil should be replaced regularly.

4、三過濾更換周期(柴過濾、機過濾、空過濾、水過濾)，過濾器起到過濾柴油、機油或水的作用，防止雜質進入機體內。 柴油中油污、雜質也是不可避免的存在，因此在機組運行過程中，過濾器起著重要的作用，但同時這些油污或雜質也堆積在過濾壁上，降低了過濾器的過濾能力，堆積過度，油路由此成為油機的備用機組每兩年更換一次。

4. Three filter replacement cycles (diesel filter, machine filter, air filter, water filter), the filter plays a role in filtering diesel, engine oil, or water, preventing impurities from entering the engine body. Oil pollution and impurities are also inevitable in diesel, so filters play an important role in the operation of the unit. However, at the same time, these oil pollutants or impurities also accumulate on the filter wall, reducing the filtering ability of the filter and causing excessive accumulation. As a result, the oil circuit becomes a backup unit for the oil engine, which is replaced every two years.

5、冷卻系統、水泵、水箱及輸水管道長時間不沖洗，水循環不暢，冷卻效果下降，管接頭是否良好，水箱、自來水是否漏水等冷卻系統出現故障，導致冷卻效果較差，機組即使水箱漏水導致水箱內水位下降，機組也不能正常動作。 (冬季使用發電機時，建議在冷卻系統中安裝水加熱器，以免水管凍結。

5. If the cooling system, water pump, water tank, and water delivery pipeline are not flushed for a long time, the water circulation is not smooth, the cooling effect decreases, the pipe joints are good, and the water tank and tap water are leaking, the cooling system malfunctions, resulting in poor cooling effect. Even if the water level in the water tank drops due to water leakage, the unit cannot operate normally. When using the generator in winter, it is recommended to install a water heater in the cooling system to prevent water pipes from freezing.

6、潤滑系統、密封，由于潤滑油或油脂的化學特性和機械磨損后產生的鐵屑，它們不僅降低了潤滑效果，而且加速了零件的損傷，同時由于潤滑油對橡膠墊有一定的腐蝕作用。

6. Lubrication systems and seals, due to the chemical properties of lubricating oil or grease and the iron filings generated after mechanical wear, not only reduce lubrication effectiveness, but also accelerate part damage. At the same time, lubricating oil has a certain corrosive effect on rubber pads.

7、燃料、閥門系統、發動機功率主要由燃料在缸內燃燒做功，由于燃料通過噴油嘴噴出，燃燒后的沉積物堆積在噴油嘴上，隨著堆積量的增加，噴油嘴噴射量受到一定的影響，噴油嘴點火提前時間不均勻因此，燃料系統定期清洗、過濾部件的更換、油供給變得順暢，能夠向閥系統進行調整。

7. The fuel, valve system, and engine power are mainly powered by the combustion of fuel in the cylinder. As the fuel is sprayed out through the fuel injector, the sediment after combustion accumulates on the injector. As the accumulation increases, the injection amount of the injector is affected to a certain extent, and the ignition advance time of the injector is uneven. Therefore, the fuel system is regularly cleaned, filter components are replaced, and the oil supply becomes smooth, which can be adjusted to the valve system.

8、沼氣發電機組控制部分、油機控制部分也是機組維護的重要部分，機組使用過長，線路接縫松動，AVR模塊是否正常工作。

8. The control part of the biogas generator unit and the control part of the oil engine are also important parts of unit maintenance. If the unit is used too long, the line joints are loose, and whether the AVR module is working properly.