How to determine faults in the frequency converter during crane operation

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Skilled operators with sufficient experience in operating cranes often have their own simple techniques to help identify and address common faults that occur during crane operation, such as failures of frequency converters. Regarding the structure of the crane itself, the frequency converter is usually directly connected to the motor. If it is suspected that there may be a malfunction in the crane’s operation, simple methods can be used first to determine whether the problem lies with the motor, or with the wiring, or the frequency converter. The judgment skills required here rely on a small tool – a multimeter, which is an auxiliary tool often used in the maintenance of mechanical equipment such as cranes. The crane operator can first use a multimeter to check whether there is a connection at the power input of the inverter, or whether there is any output from the inverter’s output terminal, thereby using this as a basis to determine whether the inverter is faulty. Additionally, a multimeter can also be used to help drivers determine whether there are faults in the wiring of the crane; for example, it can be used to check whether the wiring is conductive or to verify that the insulation between the various wires is in good condition