The equipment on site suddenly malfunctioned. The supervisor demanded the problem be resolved within half an hour. He hurriedly grabbed tools to test it. He discovered the problem wasn't easy to solve. Debugging and fixing it would take some time. As a result, the boss was dissatisfied with the work. He thought the efficiency was insufficient and delayed production. What are some common inverter fault solutions?
1. How to distinguish between heavy faults and light faults?
When a light malfunctions, the system issues an alarm signal, and the fault indicator flashes. In the event of a serious fault, the system will issue a fault indicator that remains illuminated, along with commands to disconnect the high voltage and prohibit reconnection, and will store the fault information and the high voltage disconnect command. If the serious fault condition is not cleared, the fault indication and high voltage disconnect command remain valid.
2. What are minor problems?
Lighting faults include: transformer overheat alarm, cabinet overheat alarm, cabinet door open, unit bypass, and system-wide faults with no memory processing (only fault indication is displayed, and the alarm automatically clears after the fault disappears). If a minor fault alarm occurs during inverter operation, the system will not stop. If a minor fault alarm occurs during shutdown, the inverter can continue to operate.
3. What is the main fault?
The following faults should be considered major faults. The main fault types are displayed in the upper left corner of the monitor: external fault, transformer overheating, cabinet overheating, unit fault, inverter overcurrent, high-voltage power loss, interface board fault, controller communication failure, interface board communication failure, motor overload, parameter error, and main control board fault. Unit faults include fuse failure, unit overheating, driver failure, fiber optic fault, and unit overvoltage. For external faults, the high-voltage disconnect line (cabinet door button or external connector) must be disconnected before system reset to restore the system to normal. After a major fault other than an external fault, the system can be directly reset to restore it to normal, but the cause of the fault must be found before power is restored. After a unit fault occurs, the unit status can only be detected after the high-voltage power is restored. If the fault is difficult to analyze and it is uncertain whether the high voltage can be restored, please consult the manufacturer. Note: Do not rush to restore power before finding the cause of the fault, otherwise the inverter may be seriously damaged!
4. Transformer over-temperature alarm: When the measured temperature of the transformer temperature controller exceeds its set alarm temperature (default setting is 100℃), the over-temperature alarm contact of the temperature controller will close.
Check if the top or bottom fan of the transformer cabinet is working properly (if the bottom fan is malfunctioning, the three-phase temperature difference may be large); check if the temperature resistance is normal (check if the wires are broken, if the plugs are making poor contact, and if the contact is poor, check if the temperature value is high); check if the filter is clogged (place an A4 sheet of paper on the filter to see if it can be absorbed; otherwise, clean the filter); check if the frequency converter has been overloaded for a long time; check if the ambient temperature is too high (the ambient temperature should be below 45℃; otherwise, ventilation should be increased); check if the fan switch and contactor installed at the bottom front of the transformer cabinet are disconnected; check if the fan control and protection circuit of the transformer cabinet is normal.
5. Cabinet Temperature Over-Temperature Alarm Unit: When the temperature of the cabinet exceeds 55℃, the system will issue a cabinet temperature over-temperature alarm.
Check if the fan on top of the cabinet is working properly, and if the fan switch installed in the secondary room has tripped; check if the filter is clogged (place an A4 sheet of paper on the filter screen to see if it can be absorbed; otherwise, clean the filter screen); check if the frequency converter has been overloaded for a long time; check if the ambient temperature is too high (the ambient temperature should be below 45℃; otherwise, ventilation should be strengthened (using a wall-mounted fan or an air duct installed on top of the cabinet) or cooling equipment); check if the transformer cabinet fan control protection circuit is normal.
6. Transformer overheating: The temperature measured by the transformer temperature controller is higher than its set trip temperature (default setting is 130℃). When...
What are some common inverter fault solutions? This category collects and displays some common fault codes. In addition to providing the causes and solutions, we've also thoughtfully included related courses at the end. Besides troubleshooting, it also offers targeted improvement of knowledge and skills, making it highly practical.
