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11.2.2 Maintenance (Every two years)
Item Check method
System status and cleaning
Check the following items, and correct immedi-
ately those failing to meet the relevant
requirements:
• Check whether there is any damage or deforma-
tion of the inverter and internal equipment.
• Check if there is abnormal noise during the oper-
ation of internal equipment.
• Check whether the temperature inside the inver-
ter is excessively high.
• Check whether the humidity and the amount of
dust inside the inverter are within the normal
range. Clean it if necessary.
• Check whether the air inlet and outlet of the in-
verter are blocked.
Warning marks
Check whether the warning labels and marks are
clearly visible and free of stains and damage. Re-
place them if necessary.
Ground of the shielded layer of
cables
Check whether the cable shielding layer is in good
contact with the insulation sleeve and whether the
copper bus bar is firmly fixed.
Wiring between the terminal box and
switch *
Check whether the terminal box and the switch
are connected correctly.
SPD and fuse
Check whether the SPD and fuse are properly
fastened.
Corrosion
Check whether there is oxidation or rust inside
the inverter.
Note: * means optional.
System Manual 11 Routine Maintenance
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