It is the job responsibility of Beijing Yashilin After-sales Department to do a good job in product pre-sale, sale and after-sales service. No matter how good the product is, there are times when a fault occurs. How to quickly determine the fault and keep the test box in a good working state has always been the subject of research by environmental test equipment manufacturers. The author has been engaged in after-sales service of environmental test equipment for more than ten years. Years of after-sales service experience summarize the following common faults and solutions:
1. The low temperature can not reach the test index, we must first observe the temperature change, whether the temperature drops slowly, or the temperature has a tendency to rise after the temperature reaches a certain value, the former should check whether the studio will be tested before the low temperature test After drying, keep the studio dry before putting the test samples into the working room for testing, whether the test samples in the working room are placed too much, so that the wind in the working room cannot be fully circulated. After eliminating the above reasons, it is necessary to consider Whether it is a fault in the refrigeration system, so we must ask the company's professionals to carry out maintenance. The latter phenomenon is caused by the poor use environment of the equipment. The ambient temperature of the equipment and the location (the distance between the back of the cabinet and the wall) must meet the requirements (detailed instructions are in the equipment instructions).
2. In the wet heat test, the actual humidity will reach 100% or the actual humidity is very different from the target humidity, the value is much lower, the former phenomenon: it may be caused by the dry gauze on the wet ball sensor, it is necessary to check the wet ball Whether the water tank of the sensor is short of water, the water level in the water tank is automatically controlled by a water level controller, check whether the water supply system of the water level controller is normal, and whether the water level controller works normally. Another possibility is that the wet ball gauze will harden the gauze due to the long usage time or the purity of the water supply, so that the gauze can not absorb the water and dry, and only need to replace or clean the gauze to eliminate the above phenomenon. The latter phenomenon is mainly because the humidification system does not work, check the water supply system of the humidification system, whether there is a certain amount of water in the water supply system, whether the water level control to control the water level of the humidification boiler is normal, and whether the water level in the humidification boiler is normal. If all of the above is normal, then check the electrical control system, which requires professional maintenance personnel to carry out maintenance.
3. When the equipment suddenly fails during the test operation, the corresponding fault display prompt appears on the control instrument and there is an audible alarm prompt. The operator can quickly check which type of fault belongs to the chapter of troubleshooting in the operation and use of the device, and then you can ask a professional to quickly troubleshoot to ensure that the test is carried out normally. There will be other phenomena in the use of other environmental test equipment, then specific phenomena, specific analysis and elimination are required. The environmental test equipment should also be regularly maintained, the condenser of the refrigeration system should be cleaned regularly, the moving parts should be lubricated and lubricated according to the instructions, and the electrical control system should be regularly maintained and inspected. These tasks are essential.
4. In the high temperature test, if the temperature change does not reach the test temperature value, you can check the electrical system and eliminate the fault one by one. If the temperature rises very slowly, it is necessary to check the wind circulation system to see if the adjustment baffle of the wind circulation is opened normally, otherwise, check whether the motor of the wind circulation is operating normally. If the temperature overshoot is severe, the PID setting parameters need to be adjusted. If the temperature rises directly and the over-temperature protection, then the controller fails, the controller must be replaced.
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