81
Item Check method
Screw Check whether internal screws fell off.
Exterior of the inverter
Check the following items, and correct immediately those fail-
ing to meet relevant requirements:
• Check whether there are flammable objects on the top of the
inverter.
• Check whether the welding points between the inverter and
foundation steel plate are firm and if there is corrosion.
• Check whether the enclosure of the inverter is damaged,
painted, or oxidized.
• Check whether the monitoring window and cabinet door can
be opened flexibly.
• Check whether the sealing strip is fixed properly.
Interior of the
transformer
Sample the internal oil at the oil leakage port to analyze the
operation status of the transformer.
11.2.4 Maintenance (Every half a year to once a year)
Item Check method
Safety function
• Check whether the shutdown key on the touchscreen and
the e-stop button work normally.
• Simulate shutdown.
• Check the warning marks and other device marks, and re-
place them timely if they are fuzzy or damaged.
Software maintenance
Check the settable parameters on the touchscreen.
Internal components
inspection
• Check whether the circuit board and other components are
clean.
• Check the temperature of the heat sink and the amount of
dust accumulated. Clean heat-dissipation modules with a vac-
uum cleaner if necessary.
• Replace the air filter screen if necessary.
Note! Be sure to check the ventilation of the air inlet. Other-
wise, the fault may be caused due to overheating if the module
cannot be cooled effectively.
System Manual 11 Routine Maintenance
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