Docking garbage truck circuit common faults and maintenance methods
1. Intuitive diagnosis method: When the garbage truck circuit of the docking type malfunctions, abnormal phenomena such as smoke, sparks, abnormal sound, burnt odor, and heat can sometimes occur. These phenomena can be observed directly so that the location of the fault can be determined.
2. Open circuit method: When there is a ground fault in the docking garbage truck circuit equipment, it can be judged by the open circuit method. After the circuit section that is suspected to have a ground fault is disconnected, whether the ground fault in the electrical equipment is still present is judged. The location and reason of the circuit ground.
3, short circuit method: docking garbage circuit circuit failure, you can also use the short circuit method to determine, that is, with a screwdriver or wire will be suspected circuit breaker fault short circuit, observe the meter pointer changes or electrical equipment working conditions to determine Is there a circuit failure in the circuit?
4, test light method: test light method is to use a docking garbage light bulb as a test light, check the circuit for any open circuit failure.
5. Instrumentation method: Observe the instructions of the ammeter, water temperature gauge, fuel gauge, oil pressure gauge, etc. on the docking-type garbage truck dashboard to determine whether there is any fault in the circuit. For example, when the engine is cold and the ignition switch is turned on, the water temperature meter indicates that the full-scale position does not move, indicating that the water temperature sensor has a fault or that the circuit has a ground connection.
6, low-voltage grounding test method: that is, remove a certain end of the power equipment to the docking garbage truck metal part of the test and produce sparks to judge. This method is relatively simple, and it is a method often used by electricians in the vast number of docking garbage trucks. The hot landing test method can be divided into direct grounding and indirect grounding. The so-called direct grounding is a direct spark that generates intense sparks without any load. For example, we have to determine if there is a fault in the circuit between the ignition coil and the battery. You can remove the end of the ignition coil that is connected to the ignition switch and scratch it on the docking garbage truck body or frame. If there is a strong spark, the circuit is normal. If there is no spark, it means that there is an open circuit in the circuit. Indirect grounding is used to determine if there is a fault in the line or load by using a certain load on the docked garbage truck appliance to generate weak sparks. For example, if you have a spark plug on a conventional ignition system breaker cable, it means that the line is normal; if there is no spark, it means that the circuit has an open circuit. It is particularly worth noting that the test fire method cannot be applied to electronic circuit docking garbage trucks.
7, high-pressure test method: the high-voltage circuit ground iron test fire, observe the spark status, determine the ignition system work. The specific method is: Remove the high-voltage wire of the ignition coil or spark plug, aim it at the spark plug or the cylinder head, and the distance is about 5mm, then turn on the start switch and turn the engine to see its flashover condition. If the spark is intense, sky blue, and the sound of jumping fire is louder, it means that the ignition system is working normally; otherwise, the ignition system is not working properly.
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