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  • wrecker towing truck

    HOWO 50 ton heavy duty wrecker towing truck

    This wrecker has the functions of lifting, pulling, lifting, etc. It is convenient, quick, good-looking, safe and reliable. This truck wrecker is widely used in highways, public security traffic police, airports, terminals, auto repair industry and highway companies, etc.

  • heavy duty separated tow truck

    HOWO 40 ton boom and underlift separated tow truck

    Wrecker truck equipped with lifting winch device and wheel bracket which can lift, towing, back load and transport.Widely used in road, police traffic, airports, docks, auto repair company, industry and highway departments, timely, fast clean-up accident, failure, illegal and other vehicles.

  • heavy duty ratotor towing truck

    Howo 30 ton heavy duty ratotor towing truck

    Road wrecker is used for safety salvage of vehicles subject to city road, suburb way, highway, airport and bridge road. It is suitable for medium and small-sized cargos, cars and other special vehicles, which are allowed within the technical parameters of this kind

  • heavy duty integrated tow truck

    25 ton howo heavy duty integrated line of wrecker ​recovery truck

    The tow wrecker is called the road wrecker, also known as road rescue vehicle. It has many functions such as lifting, pulling and lifting traction. 

  • stage boom breakdown truck

    25 ton howo heavy duty with stage boom breakdown truck

    The INT series is out integrated line of tow trucks commonly called wreckers. We have a wide range of products with 6 different models ranging for the small 3 ton to the massive 60 ton with a 3 stage boom. 

Fault Analysis of Refrigeration System of Refrigerated Truck

2023-02-10

1. Carefully observe the working conditions of each component of the air conditioner on refrigerator truck, focusing on the three parts of the refrigeration system, electrical system, and wind system to judge whether they are working normally.

Refrigerator truck

2. Turn on the power and listen carefully to whether the sound of the air conditioner compressor is running normally, whether there is any abnormal sound, whether there is any noise in the operation of the fan, whether the noise is too loud, etc. When the air conditioner is running, under normal circumstances, the vibration is slight and the noise is small, generally below 50DB. If the vibration and noise are too large, the possible reasons are foam plastic pads, etc., which can make the air conditioner vibrate and make noise during operation. Especially when the air conditioner is just starting and stopping, it is most obvious. The chassis collides, and the fan's If the axis moves, the blades will lose their balance and there will be impact sounds; if there are foreign objects in the fan, the blades will also produce impact sounds when they collide with them.

Refrigerated truck

3. Touch the relevant parts of the air conditioner with your hands to feel the heat, cold, and vibration, which will help you judge the nature and location of the fault. Under normal circumstances, the temperature of the condenser gradually decreases from top to bottom, and the temperature of the lower part is slightly higher than the ambient temperature. If the entire condenser is not hot or the upper part is slightly warm, or if it is hot but there is a significant difference in temperature between the upper and lower adjacent pipes, it is abnormal. Under normal conditions, put a finger dipped in water on the evaporator On the surface of the evaporator, there will be a cold and sticky feeling. Under normal conditions, the capillary at the dryer and the outlet should have a sense of warmth (slightly higher than the ambient temperature, which is basically the same as the temperature of the end pipe of the condenser). Low temperature or dew condensation on the surface and temperature difference between capillary sections are abnormal. The temperature of the suction pipe 200mm away from the compressor should be about the same as the ambient temperature under normal conditions.

Freezer Truck

4. In order to accurately judge the nature and location of the fault, it is often necessary to use instruments and meters to check and measure the performance parameters and status of the air conditioner. For example, use a leak detector to check whether there is refrigerant leakage; use a multimeter to measure the power supply voltage, the current of each terminal to ground and Whether the operating current meets the requirements, the air conditioner controlled by computer should also measure whether the potential of each control point is normal, etc.

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