Thorough and periodic maintenance, inspections, and overhauls are recommended to detect and promptly eliminate any faults before they can cause further damage. Since operating conditions cannot be defined exactly, only general terms can be given assuming fault-free operation. Timing on maintenance scheduling and inspections should always be adapted, by the customer, to the conditions of the installation site (dirt, applied load, etc.) and the specific application.
<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/668f4835-3f6d-463a-b53e-5a1438b8b8df/MicrosoftTeams-image.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/668f4835-3f6d-463a-b53e-5a1438b8b8df/MicrosoftTeams-image.png" width="40px" /> People with pacemakers are in danger near rotors disassembled from the motor.
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<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/2143829a-5163-4518-a4af-519f1a58207b/general-warning-sign_hires.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/2143829a-5163-4518-a4af-519f1a58207b/general-warning-sign_hires.png" width="40px" /> Maintenance, inspection, and overhaul operations must be carried out by qualified personnel and in accordance with current safety regulations.
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<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/68730098-ad21-4a0f-927f-148fa08c4977/electricity-hazard_hires.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/68730098-ad21-4a0f-927f-148fa08c4977/electricity-hazard_hires.png" width="40px" /> Any work on the motor should be done only after disconnecting the power supply upstream of the inverter and then securing it against accidental starting.
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<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/3a47597c-dd3e-4ede-a267-596128bd4125/electricity-hazard_hires.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/3a47597c-dd3e-4ede-a267-596128bd4125/electricity-hazard_hires.png" width="40px" /> When disconnecting the motor from the power supply for maintenance work, care should be taken that in addition to the power circuit, any auxiliary circuits (e.g., anti-condensation heaters, external fans, brakes, etc.) should also be disconnected from the power supply as dangerous voltage may be present on them.
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<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/e39034cb-427f-4054-ada6-6c325e16b38b/electricity-hazard_hires.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/e39034cb-427f-4054-ada6-6c325e16b38b/electricity-hazard_hires.png" width="40px" /> Before working on the motor, make sure the shaft is locked and cannot rotate. A rotation of the shaft induces a voltage proportional to the speed of the motor shaft (generator operation).
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<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/6876c4a5-39cf-4df7-9305-1298a7456b61/magnetic-fields_hires.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/6876c4a5-39cf-4df7-9305-1298a7456b61/magnetic-fields_hires.png" width="40px" /> Three-phase permanent magnet synchronous motors emit stray magnetic fields during assembly and disassembly. The rotors of such motors can disturb or damage electronic devices such as pacemakers, cell phones, credit cards, watches, etc.
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<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/a5a09299-3940-47e0-8d8a-bf168d86a0aa/warning-crushing-of-hands_hires.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/a5a09299-3940-47e0-8d8a-bf168d86a0aa/warning-crushing-of-hands_hires.png" width="40px" /> Special purpose-built equipment is recommended for rotor disassembly and assembly. Failure to heed this warning could create crushing hazards to the operator's hands, resulting in injury. When assembling the rotor, make sure that no metal debris is present on the outer surface of the rotor.
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<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/aeb7918b-877d-4ad9-a29a-aa6595d2fb64/hot-surface_hires.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/aeb7918b-877d-4ad9-a29a-aa6595d2fb64/hot-surface_hires.png" width="40px" /> The surface of the motor may become hot during operation and should not be handled until it cools down. Ensure that all components that may be sensitive to heat are protected from any potential source.
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Use only non-abrasive and non-corrosive cleaning products that are compatible with aluminum. When using a pressure hose to clean the machine, make sure the water jet is never aimed directly at items such as gaskets, cable glands, bearings, or vent plugs.