KONE elevator V3F16L inverter repair steps - Database & Sql Blog Articles

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1. When receiving the KONE elevator V3F16L inverter for repair, please send the repair personnel to understand the situation in detail:
When we receive the KONE elevator V3F16L inverter sent by the customer, we should know the function of the V3F16L inverter to be repaired by the repairer, understand the use environment of the KONE elevator V3F16L inverter, the environmental conditions and faults when the fault occurs. Phenomenon and cause of failure.
Second, before the maintenance, the V3F16L inverter of the repairing force should be carefully and carefully checked:
Before we carry out maintenance, we should use the special cleaning liquid for the circuit board to clean the circuit board in the V3F16L inverter, and take a picture with a high-definition, high-pixel digital camera. After the photo is taken, the V3F16L inverter circuit board should be repaired. Careful observation of each part, focusing on the front and back of the circuit board with or without erosion, printed circuit disconnection, component soldering, short circuit, device with or without cracking and other obvious damage.
Third, the composition of the circuit board of the KONE elevator V3F16L inverter for maintenance is analyzed, and the maintenance plan is formulated according to the fault phenomenon:
Through the analysis of the circuit board structure of the KONE elevator V3F16L inverter to be repaired, analyze the possible parts of the fault according to the fault phenomenon, and develop a maintenance plan.
4. Measure the key points in the circuit board of KONE Elevator V3F16L inverter:
When starting to repair the KONE elevator V3F16L inverter circuit board, it should be carried out step by step according to the established maintenance plan to find and compress the fault.
1. Measure the static resistance value between the positive pole of the power supply board of the KONE elevator V3F16L inverter and the ground to determine whether the power supply is short-circuited;
2. Use a multimeter to measure some discrete components, such as diodes, transistors, etc.;
3. Perform the function test of the device with the circuit online tester, and mark the test results one by one: good, bad, and suspicious;
4. Use the ASA method for comparison test to further judge whether it is good or bad; if there is a programmable device or program memory, read and store the contents of the good board and compare it with the faulty board (record the data file name in the maintenance record sheet) );
5. Power up the KONE elevator V3F16L inverter circuit board, measure whether the power supply voltage is stable, and touch the device for overheating; use the oscilloscope to check the signal waveform of the device pin, such as the signal on the bus, the clock signal of the CPU, etc.
6. Various instruments are alternately measured, and the test results are comprehensively analyzed to improve the accuracy of the judgment;
7. Remove the devices labeled "Bad" and "Suspicious" for offline testing to determine if they are damaged.
5. Replace the faulty device in the circuit board of KONE Elevator V3F16L inverter:
Through the above detection, it is generally possible to find damaged electronic components. When replacing damaged electronic components, electronic components of the same type and specifications should be used to ensure that the parameters of the circuit board of the KONE elevator V3F16L inverter are not greatly changed.
Sixth, the review of KONE elevator V3F16L inverter after repair:
Before assembling the circuit boards of KONE Elevator V3F16L inverter, a careful review should be carried out. The main components of the replaced device components are not installed correctly. The welding has no solder joints or short circuits. The internal The connection line is not inserted incorrectly, and the positive and negative of the electrolytic capacitor and the diode device are not reversed.
Seven, KONE elevator V3F16L inverter repair test:
After repairing the KL elevator V3F16L inverter, it is necessary to get the test in the elevator equipment test platform. After installing it on the elevator equipment test platform, it should be confirmed that each wiring plug is inserted incorrectly, and it is confirmed that each wiring plug is not inserted incorrectly. Put the elevator into the inspection state, send power to the elevator and check whether the parameter setting of the drive cabinet is correct. If it is incorrect, it should be changed according to the correct parameter value. After confirming the parameters are correct, the standby test state is performed on the key test points of the V3F16L inverter. When the test, the test data and the standard value are met, the trial operation in the inspection state is allowed. When the test run, the operation should be performed in the downward direction. If the operation can be performed in the downward direction, then the test operation is performed in the upward direction, and then the maintenance is performed. After the upper and lower directions can be run in the state, the elevator will be self-learned (commonly referred to as slab and high-level measurement). After self-study, the elevator can be used in the normal operation position to monitor the key point data of the V3F16L inverter again. Whether it meets the standard value and confirms that there is no abnormality before the elevator can be tested for no-load operation of the express train.
Eight, establish KONE elevator V3F16L inverter repair case document:
It is recommended that when you repair the KONE elevator V3F16L inverter, you should develop the habit of writing the maintenance case of the KONE elevator V3F16L inverter. The purpose of writing the maintenance case is to summarize the experience in the maintenance process, encounter those problems, and where to go during the maintenance. The detour, and finally what method is used to solve the problem, through the establishment of the KONE elevator V3F16L inverter repair case, to lay a solid foundation for improving maintenance skills.