Filter Checking And Cleaning - Sungrow SG500MX Operation Manual

9 Routine Maintenance
Item
LCD time
display
Check the module fans inside the cabinet periodically and the fans on top of the
cabinet for abnormal operation and abnormal noise. If so, there may be dust
penetrating inside the inverter. Stop the inverter and clean the dust.
Wait at least 5 minutes after the inverter discharge completely. Before cleaning, make
sure, with multimeter, the inverter internal is discharged completely to avoid electric
shock.
Almost all maintenance work needs to remove the internal protective grid during
maintenance. Make sure to reassembly the grid and fasten all the screws after the
maintenance work.
Make sure all bolts are securely fixed.
The frequency of maintenance operations could be increased according to the
environmental conditions of the place where the inverter is suited, plant capacity
and on-site situations.

9.3 Filter checking and cleaning

It is recommended to check and clean the inverter filter at least once every six
months.
The maintenance interval should be shortened to once every three months or
shorter if the dust deposition is heavy.
Cool air comes into the inverter from the front and hot air is exhausted from the inverter from
the top. There are two air inlet windows on the lower front side of the inverter cabinet (as
marked by item "A" in the following figure). Proceed as follows to clean or replace the filter
periodically.
44
Method
 Check if the time displayed on the LCD display is
correct;
 Replace the button cells on the back of the LCD
panel if time is incorrect after calibration.
Operation Manual
Interval
Everyone and a half
year