Shandeka Air Conditioning Panel Black Screen Troubleshooting, Guangheng Technician Accurately Investigate and Quickly Repair
Shandeka Air Conditioning Panel Black Screen Troubleshooting, Guangheng Technician Accurately Investigate and Quickly Repair
[Customer Background] A Shenzhen freight company has a Shandeka high-end heavy truck, which is mainly used for long-distance freight transportation. During driving, the air conditioner panel suddenly went black, the air conditioner could not be turned on normally, and many repairs in other maintenance organizations could not be solved. It coincided with the high temperature in summer. The air conditioner failure seriously affected the driver's driving safety, and the vehicle ran long distances for a long time and could not be shut down for a long time. Shenzhen Guangheng 7 × 24 hours.
[Fault Phenomenon] When the vehicle is driving, the air conditioner panel suddenly has a black screen, the keys do not respond, the air conditioner cannot be cooled and heated, and at the same time, the instrument panel occasionally has a fault prompt, but the specific fault code cannot be read. After the maintenance organization replaced the air conditioner panel, the fault has not been solved. It is suspected that there is a problem with the circuit system, but the fault point cannot be accurately located.
[Diagnosis Process] After receiving rescue help, Shenzhen Guangheng immediately arranged senior circuit technicians to carry professional testing equipment to the location designated by the customer for on-site diagnosis. According to the circuit structure characteristics of Shandeka model, the technician adopts segmented detection method to first check the circuit connection of the air conditioning panel to eliminate the problems of loose and short circuit. Then, the vehicle circuit system data are read through the computer diagnostic instrument, and the key parts such as the air conditioning control module, line interface and power supply are checked one by one in combination with the self-made electrical fault detection tool. Finally, the root cause of the fault is the aging of the air conditioning control module and poor contact, resulting abnormal signal transmission, panel black screen.
[Maintenance Plan and Implementation] Considering that the customer's vehicle cannot be shut down for a long time, the technician has formulated a quick maintenance plan: first, replace the aging air conditioning control module and use the original genuine parts to ensure the adaptation to the vehicle; The second is to comprehensively arrange the air conditioning system circuit, re-tighten the circuit interface, deal with the poor contact parts, and avoid subsequent failures. The third is to conduct a comprehensive inspection of the entire circuit system of the vehicle, investigate potential hidden dangers to ensure stable operation of the circuit system; The fourth is to carry out on-site debugging to verify the operation effect of the air conditioner and ensure that the fault is completely solved.
[Maintenance Effect] The whole on-site maintenance process takes 2 hours to complete the fault repair efficiently. The air conditioning panel returns to normal, the cooling and heating functions are normal, the circuit system runs stably without any fault prompt. At the same time, the technician explained the daily maintenance knowledge of the air-conditioning system to the driver, reminding him to check the line regularly to avoid similar failures. Customers highly recognize Shenzhen Guangheng's rapid response and accurate maintenance capabilities, and the subsequent maintenance of long-distance transport vehicles is entrusted to Shenzhen Guangheng.
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