Popular Searches:
A: 1. Overvoltage: Fault in the voltage detection circuit; too short acceleration and deceleration; too high input voltage; peripheral issues
2. Undervoltage: Open circuit at the input end; faulty rectifier bridge or unit drive board
3. Unit overheating: Fault in the temperature detection element; reversed rotation of the top cabinet fan; environmental problems
4. Unit fiber optic communication fault: Issues with the fiber optic board, fiber optic connector, or wiring
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