Routine Maintenance; Fan Maintenance - Sungrow SG4.0RT User Manual

User Manual

9.2.2 Routine Maintenance

Item
Device clean
Electrical
connection
General status
of the system

9.2.3 Fan Maintenance

If the inverter has an external fan, when the fan fails to work normally, the inverter cannot be
effectively cooled, which will affect the efficiency of the inverter or cause derated operation.
Therefore, keep the fan clean and replace the damaged fan in time.
• Power off the inverter and disconnect it from all power supplies before main-
taining fans.
• After the inverter is powered off for 10 minutes, measure the voltage and cur-
rent with professional instrument. Only when there is no voltage nor current
can operators who wear protective equipment operate and maintain the inverter.
• Fan maintenance must be performed by professionals.
step 1 Refer to "8.1 Disconnecting Inverter"
step 2 Refer to "5 Electrical Connection"
step 3 Refer to "4 Mechanical Mounting"
step 4 Unscrew the screws on the fan bracket.
Method
Check the temperature and dust of the
inverter. Clean the inverter enclosure if
necessary.
Check whether all cable are firmly con-
nected in place.
Check whether there is damage to the
cables, especially the surface in con-
tact with metal.
• Visual check for any damage or de-
formation of the inverter.
• Check any abnormal noise during
the operation.
• Check each operation parameter.
• Be sure that nothing covers the
heat sink of the inverter.
to stop the inverter.
and disconnect all the cable connections in reverse steps.
and dismantle the inverter in reverse steps.
9 Troubleshooting and Maintenance
Period
Six months to a year
(depending on the dust con-
tents in air)
6 months after commissioning
and then once or twice a year
Every 6 months
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