The common faults of the inverter during use are as follows: 1. State fault; 2. Hardware fault; 3. System fault; 4. Communication fault; 5. Power fault monitoring. As a common inverter accessory product, the terminal block can also affect the output efficiency of the inverter. The existing Le Electric will list the common problems caused by the terminal itself and cause the inverter products to be unusable, giving you the most comprehensive solution to the inverter terminal problem.
First of all, we should know in detail what are the causes of common faults in the inverter?
1. State fault: DC over/long voltage, DC overcurrent, AC overcurrent, excessive speed deviation, ground fault, and lack of equal.
2. Hardware failure: current board failure, trigger board failure, IGBT failure, pulse generator failure, etc.
3. System failure: Watchdog failure, system parameter abnormality, clock failure, etc.
4. Communication failure: TIMEOUT, OVERRUN, etc.
5. Power failure: Alarm when the control power is too high/low.
Next let us analyze the problem of the terminal specifically:
1. Switching power supply operation panel has no display:
Firstly, the control voltage of the control terminal and the 10V frequency adjustment voltage should be measured. If it is zero, the terminal is used normally, otherwise the higher quality connected product needs to be replaced; secondly, the resistance of the main terminal of the inverter is normal;
2. The inverter incoming line cannot measure data:
No faults were found when viewing the fault log in the drive menu, and the operation of each button on the operator panel was recorded in the event log. Check that the LED indicators on the A10 main board and A22 power board in the inverter are normal. Use the test pencil to measure the incoming power of the inverter. It is found that one phase is not normal. The three-phase result measured by a multimeter is: Vab=390V, Vac= 190V, Vbc=190V. Poor contact at the terminal block of the incoming line of the inspection system.
3. Carbonization of terminals in the inverter module:
When checking the inverter module for no bad symptoms, check the insulation problem between each terminal and the ground. Once the plastic insulated terminals between the DC bus circuit terminals P-P1 and N are found to have charring signs, replace them from a safety point of view. If the terminal is damaged, the inverter can resume normal operation.
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Jingjiang Gisen Technology Co.,Ltd , https://www.jsgisengroup.com