沼氣發電機組出現故障時，操作人員應沉著仔細及時地分析故障的特征，并判斷其產生的原因。通常沼氣發電機組出現這些問題要預防：

When the biogas generator unit fails, the operator shall analyze the characteristics of the failure carefully and timely, and judge the cause. In general, these problems of biogas generating units should be prevented:

1.啟動困難出現該故障，先應檢查混合器是否有沼氣進入沼氣發電機組，沼氣供給系統是否有故障，檢查混合氣是否符合質和量的要求。然后檢查所有缸線是否跳火，逐步檢查點火系統、12V電源系統等是否工作正常，具體步驟如下：

1. It is difficult to start. In case of this fault, first check whether there is biogas entering the biogas generator set in the mixer, whether there is fault in the biogas supply system, and whether the mixed gas meets the quality and quantity requirements. Then check whether all cylinder lines are tripped, and gradually check whether the ignition system and 12V power supply system work normally. The specific steps are as follows:

1)檢查沼氣裝置或電路是否有故障，ECU電源打開后，減壓器電磁閥應有喀噠響聲。

1) Check whether the biogas device or circuit is faulty. After the ECU power is turned on, the solenoid valve of the pressure reducer should have a clicking sound.

2)檢查12V繼電器是否良好。

2) Check whether the 12V relay is in good condition.

3)檢查沼氣管路是否暢通，閥門是否開啟。

3) Check whether the biogas pipeline is unblocked and whether the valve is opened.

4)檢查鋼瓶是否有氣。

4) Check whether there is air in the cylinder.

5)檢查混合氣濃度是否過濃或過稀，調整混合器上的怠速濃度調整螺釘，順時針混合氣加濃，反時針混合氣變稀，或加或取一張混合器膜片銅墊片。加銅墊片混合氣變稀,減銅墊片混合氣變濃。

5) Check whether the mixture concentration is too rich or too thin, adjust the idle speed concentration adjusting screw on the mixer, increase the mixture concentration clockwise, and dilute the mixture anticlockwise, or add or take a copper gasket of the mixer diaphragm. The mixed gas with copper gasket becomes thinner and the mixed gas with copper gasket becomes thicker.

6)檢查高壓線跳火性能，檢查高壓線是否漏電。

6) Check the fire tripping performance of the high-voltage line and check whether the high-voltage line has leakage.

7)檢查線束插接件是否可靠。

7) Check whether the harness connector is reliable.

8)檢查曲軸轉角信號傳感器是否良好。

8) Check whether the crankshaft angle signal sensor is in good condition.

9)檢查整車電源及電壓變換器輸出電壓是否符合要求。

9) Check whether the output voltage of the vehicle power supply and voltage converter meets the requirements.

10)檢查蓄電瓶電壓是否過低、連接是否正常。

10) Check whether the battery voltage is too low and the connection is normal.

11)檢查火花塞電間隙是否正常，有無積炭。

11) Check whether the electric gap of the spark plug is normal and whether there is carbon deposit.

12)檢查空氣濾清器是否良好，進氣管路是否暢通。

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

13)檢查起動機是否工作正常。

13) Check whether the starter works normally.

14)檢查ECU是否工作正常。

14) Check whether the ECU works normally.

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