Sungrow SG3425UD-MV, Системное руководство

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98
Check item Check method
Grounding and
equipotential connections
• Check whether the grounding connection is performed
properly and the grounding resistance is less than 4Ω.
• Check whether the equipotential connections inside the
MV Station are performed properly.
• Check whether the equipotential connection of the oil
tray is performed properly.
Fan
• Check the running status of the fans.
• Check whether the fan blades have cracks.
• Check whether the fan makes abnormal noise during
running.
Screws Check all screws inside the MV Station.
Maintenance (once every 6 months to a year)
Check item Check method
Safety function
• Check the stop functions of the emergency stop button
and the LCD.
• Simulate shutdown
• Check the warning labels and other device symbols for
completeness and legibility, and replace them in time if
necessary.
Software maintenance
Inspect all parameter settings.
Module cleanness
• Check the temperature and cleanness of the radiator.
If necessary, clean the radiator with a vacuum.
• If necessary, replace the filter.
• Note: Check the ventilation performance of the air inlet.
Otherwise, a fault may occur in the module due to
overheat caused by poor ventilation.
LCD time display
• Check whether the time displayed on the LCD is
correct.
• After calibration, if the time is still incorrect, replace the
button cell on the back of the LCD.
Component maintenance
• Regularly check whether the metal components are
corroded (once every 6 months).
• Annually check the contactors (auxiliary switch and
micro switch) to ensure normal operation.
• Check the running parameters (especially the voltage
and insulation)
12 Routine Maintenance System Manual