The faults of refrigerated trucks can be roughly divided into three parts:

1、 Circuit malfunction;

2、 Oil circuit malfunction

3、 The driving system of the refrigerated truck has faults, such as steering, braking, transmission, etc. Among them, circuit faults are divided into high voltage circuit faults and low voltage circuit faults. In actual use, about 60% of the faults in refrigerated trucks are circuit faults, and 30% are in the oil circuit.

Most of these faults can be resolved by themselves. Only about 10% are due to operational system failures, which belong to mechanical faults. Most vehicles can still be driven when they occur and need to be repaired at nearby repair stations.

When you encounter a malfunction while driving a refrigerated truck, don't rush to get busy. First, check the reflection of the malfunction indicator light. The refrigeration unit factory teaches everyone to calm down, analyze the symptoms of the malfunction, and ask more questions about why.

1. Does a cold car suddenly or slowly stall while driving? Sudden stalling is mostly due to circuit faults; Slow engine shutdown or continuous jumping of refrigerated trucks are mostly caused by oil circuit faults.

2. Fire testing. If there is no high-pressure fire or cylinder fire, it is a circuit fault. If there is a high-pressure fire, the problem lies in the oil circuit. But most mechanical failures are accompanied by abnormal noises, which vary with the speed of the vehicle and disappear when stopping, and are not directly related to oil circuit faults.

Use paragraph by paragraph negation to focus on specific areas. First identify which type of fault it belongs to, and then check if the external fault is abnormal. If the wire is open or short circuited, it indicates that the connection part is loose, there is no smell of burnt wires in the engine, oil pipe leakage, etc.