先要按沼气发电机组的检查方法排查一下沼气发电机组的工作情况，断缸试验，看是否个别缸不工作或工作不好，每缸作比较；有无气缸漏气现象；气门间隙是否正常。在确定上述部位没有故障，判定故障可能发生在沼气装置上。故障排除方法：

First, check the working condition of the biogas generator set according to the inspection method of the biogas generator set, and conduct cylinder breaking test to see whether individual cylinders do not work or work well. Compare each cylinder; Whether there is air leakage in the cylinder; Check whether the valve clearance is normal. After determining that there is no fault at the above parts, it is determined that the fault may occur on the biogas device. Troubleshooting method:

1)沼气动力阀间隙太小，沼气流量不够，混合气过稀。调整动力阀，国Ⅲ系列沼气发电机组的动力阀装在减压器出气口，动力阀有刻度，R(-)方向为减小，L(+)方向为增大。

1) The clearance of biogas power valve is too small, the biogas flow is insufficient, and the mixture is too thin. Adjust the power valve. The power valve of the national III series biogas generator set is installed at the air outlet of the pressure reducer. The power valve has a scale. The R (-) direction is decreasing and the L (+) direction is increasing.

2)检查沼气过滤器有无堵塞。

2) Check whether the biogas filter is blocked.

3)检查压力平衡管是否漏气或破损。

3) Check the pressure balance pipe for air leakage or damage.

4)增压中冷系统是否有漏气，检查排气管垫、增压器接口、中冷器、混合器、进气管及各连接硅胶管，增压器有无损害。

4) Check whether there is air leakage in the supercharging and intercooling system. Check whether the exhaust pipe gasket, supercharger interface, intercooler, mixer, intake pipe and each connecting silicone rubber pipe are damaged.

5)排气管道或三元催化器堵塞，致排气阻力增大。

5) The exhaust pipe or three-way catalyst is blocked, resulting in increased exhaust resistance.

6)检查空气滤清器是否良好，进气管路是否畅通。

6) Check whether the air filter is in good condition and whether the air inlet pipe is unblocked.

7)检查沼气步进电机及减压器出气口到混合器之间的管路。

7) Check the pipeline from the gas outlet of biogas stepper motor and pressure reducer to the mixer.

8)混合器皮膜破损，不能形成合理的空燃比，更换皮膜。

8) The mixer membrane is damaged and cannot form a reasonable air-fuel ratio. Replace the membrane.

9)中低压减压阀二级阀片行程过小。

9) The stroke of the secondary valve plate of the medium and low pressure reducing valve is too small.

10)减压器电磁阀阀芯、阀孔是否破损，进气量不够，更换电磁阀。

10) Check whether the valve core and valve hole of the solenoid valve of the pressure reducer are damaged, and if the air intake is insufficient, replace the solenoid valve.

11)检查低减压器的膜片、弹簧、杆杆有无损害。

11) Check the diaphragm, spring and rod of the low pressure reducer for damage.

沼气发电机组动力下降的原因以及故障排查方法我们已经讲解完毕了，您可以作为参考使用，当然有疑问可以随时来我们网站http://www.huannengpower.com咨询了解！

We have explained the reasons for the power drop of the biogas generator unit and the troubleshooting methods. You can use them as a reference. Of course, if you have any questions, you can come to our website at any time http://www.huannengpower.com Consult and understand!