WEG MVW3000 Series, Руководство по программированию

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7
DIAGNOSTICS AND TROUBLESHOOTING
DANGER!
Even after the DC link voltage indication parameters present 0 V on the HMI, 250 V may still be
presented on the DC link of the power cells. Wait for ten minutes, and the cabinet doors may be
opened.
9. Execute the procedures 2 and 3 of the Preventive Maintenance During Operation.
10. Clean the dust accumulated inside the control and high voltage cabinets as described next:
Heatsink ventilation system (fans, rectifier and inverter arm heatsinks): remove the dust accumulated on the
heatsink fins using compressed air.
Electronic boards: remove the dust accumulated on the boards using an anti-static brush and/ or low pressure
ionized compressed air. If necessary, remove the boards from the inverter.
WARNING!
Electronic boards have components sensitive to electrostatic discharges. Do not touch the compo-
nents or connectors directly. If necessary, first touch the grounded metallic frame or wear a proper
grounded wrist strap.
Cabinet inner part and other components: remove the accumulated dust using a vacuum cleaner with a
nonmetallic nozzle. Perform this cleaning especially on the insulating materials that support energized parts to
avoid leakage currents during operation.
11. Connection retightening: inspect all the electrical and mechanical connections and retighten them if necessary.
12. Reinstall all the removed components and connections in their respective places and follow the start-up
procedures described in
section 6.3 ENERGIZATION, START-UP AND SAFE DE-ENERGIZATION on page 6-15 of
the User’s Manual.
MVW3000 | 7-69