Common faults of frequency converter: overcurrent, overvoltage, overload, overheating, undervoltage,

Overcurrent is divided into true overcurrent and false overcurrent; False overcurrent is caused by current detection circuits such as sampling circuit, Hall element and amplifier circuit. The real overcurrent is caused by heavy load, short acceleration time and damage of inverter module.

Overvoltage and undervoltage are generally caused by the damage of detection circuit and module, short deceleration time and high power frequency voltage.

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