在攪拌機(jī)維修過程中，我們經(jīng)常會遇到許多疑難故障，特別是攪拌機(jī)的電路故障。有時我們沒有辦法開始。我們不知道故障在哪里，更不用說快速排除故障了。下面就教你幾個攪拌機(jī)電路故障排除方法。

In the process of mixer maintenance, we often encounter many difficult faults, especially the circuit fault of the mixer. Sometimes we can't get started. We don't know where the trouble is, let alone remove it quickly. Here are some troubleshooting methods for mixer circuit.

直觀的診斷方法

Intuitive diagnostic methods

當(dāng)特種車的電路發(fā)生故障時，有時會出現(xiàn)冒煙、火花、異響、燒焦、發(fā)熱等異?，F(xiàn)象。這些現(xiàn)象可以直接觀察，從而判斷故障位置。

When the circuit of a special vehicle breaks down, some abnormal phenomena such as smoke, sparks, abnormal noise, scorching and heating may occur. These phenomena can be directly observed to determine the fault location.

開路法

Open circuit method

當(dāng)攪拌機(jī)的電路設(shè)備發(fā)生接地故障時，可用開路法進(jìn)行判斷。斷開懷疑有接地故障的電路段后，觀察電氣設(shè)備中是否仍存在接地故障，以判斷電路接地故障的位置和原因。

In case of grounding fault of mixer circuit equipment, open circuit method can be used for judgment. After disconnecting the circuit section suspected of having a ground fault, observe whether there is still a ground fault in the electrical equipment to determine the location and cause of the circuit ground fault.

短路方法

Short circuit method

如果攪拌機(jī)電路存在開路故障，也可采用短路法判斷，即用駕駛員或?qū)Ь€對懷疑存在開路故障的電路短路，觀察儀表指針的變化或電氣設(shè)備的工作情況，判斷電路是否存在開路故障。

If there is an open circuit fault in the mixer circuit, the short circuit method can also be used to judge, that is, use the driver or wire to short circuit the circuit suspected of having an open circuit fault, observe the change of the instrument pointer or the working condition of the electrical equipment, and judge whether there is an open circuit fault in the circuit.

測試燈法

Test lamp method

測試燈法是用車輛燈泡作為測試燈，檢查電路中是否存在開路故障。

The test lamp method uses the vehicle bulb as a test lamp to check whether there is an open circuit fault in the circuit.

儀表方法

Instrumentation method

觀察攪拌機(jī)儀表板上的電流表、水溫表、燃油表、油壓表的指示，判斷電路是否有故障。例如，當(dāng)發(fā)動機(jī)處于冷態(tài)且點火開關(guān)打開時，水溫表的滿刻度位置不移動，表明水溫表傳感器有故障或電路接地。

Observe the indications of ammeter, water temperature gauge, fuel gauge and oil pressure gauge on the instrument panel of the mixer to judge whether the circuit is faulty. For example, when the engine is cold and the ignition switch is on, the full scale position of the water temperature gauge does not move, indicating that the water temperature gauge sensor is faulty or the circuit is grounded.

低壓接地著火試驗方法：將電氣設(shè)備的一根電線端部拆下，試驗貨車金屬部分是否產(chǎn)生火花。這種方法相對簡單，經(jīng)常被攪拌機(jī)電工使用。接地測試有兩種方法：直接接地測試和間接接地測試。特別是在電子線路車上不能采用耐火試驗方法。

Low voltage grounding fire test method: remove the end of a wire of electrical equipment and test whether the metal part of the truck produces sparks. This method is relatively simple and is often used by mixer electricians. There are two methods of grounding test: direct grounding test and indirect grounding test. In particular, the fire resistance test method cannot be used on electronic circuit vehicles.

直接接地方式：空載直接接地產(chǎn)生強(qiáng)火花。例如，如果要判斷點火線圈與蓄電池之間的電路是否有故障，可以將點火線圈上連接點火開關(guān)的電線端拆下，在車身或車架上劃傷。如果有強(qiáng)烈的火花，說明電路正常；如果沒有火花，說明電路開路。

Direct grounding mode: no-load direct grounding produces strong sparks. For example, if you want to judge whether there is a fault in the circuit between the ignition coil and the battery, you can remove the wire end connecting the ignition switch on the ignition coil and scratch the body or frame. If there is a strong spark, the circuit is normal; If there is no spark, the circuit is open.

間接接地法：通過混凝土攪拌機(jī)電器對某一負(fù)載接地產(chǎn)生微弱火花，判斷電路或負(fù)載是否存在故障。例如，傳統(tǒng)點火系統(tǒng)斷路器的連接線接地，如果有火花，說明電路正常；如果沒有火花，說明電路開路。

Indirect grounding method: a weak spark is generated by the concrete mixer electrical appliance to ground a load to judge whether there is a fault in the circuit or load. For example, the connecting line of the circuit breaker of the traditional ignition system is grounded. If there is spark, the circuit is normal; If there is no spark, the circuit is open.

高壓著火試驗方法

High pressure ignition test method

將著火試驗的高壓電路接地，觀察電火花情況，判斷點火系統(tǒng)的工作狀態(tài)。具體方法是：取下點火線圈或火花塞的高壓線，對準(zhǔn)火花塞或氣缸蓋，距離約5mm，然后打開起動開關(guān)，轉(zhuǎn)動發(fā)動機(jī)，看到點火跳動。如果火花很強(qiáng)，天藍(lán)色，跳火的聲音很大，說明點火系統(tǒng)工作正常；否則，說明點火系統(tǒng)工作不正常。

Ground the high-voltage circuit of the ignition test, observe the electric spark and judge the working state of the ignition system. The specific method is: remove the high-voltage wire of the ignition coil or spark plug, align it with the spark plug or cylinder head at a distance of about 5mm, then turn on the start switch, turn the engine, and see the ignition jump. If the spark is very strong, the sky is blue, and the sound of fire jumping is very loud, it indicates that the ignition system works normally; Otherwise, the ignition system is not working properly.

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