SMA SB 3300-11 Installation - Manual (Page 45)

SMA Solar Technology AG Maintenance and Cleaning
Installation Manual SB33-38-11-IA-en-62 45
8 Maintenance and Cleaning
8.1 Cleaning the Inverter
If the inverter is dirty and the visibility of the operating data and operating states of the inverter is only
limited, clean the enclosure lid, the display and the LEDs with a damp cloth. Do not use any corrosive
substances (e.g., solvents or abrasives) for this.
Also check the inverters and the cables for visible external damage. Repair, if necessary.
8.2 Checking the Heat Dissipation
You only need to check the heat dissipation of the inverter if, during an optical inspection, you notice
a marked build-up in the fan guard or the inverter is increasingly observed to be in "Derating"
operating state. Whether the inverter switches to "Derating" operating state depends on the ambient
temperature and cooling efficiency.
8.2.1 Cleaning the Fans
If the fan guard is only covered in loose dust, it can be cleaned with a vacuum cleaner.
If you do not achieve satisfactory results with a vacuum cleaner, dismantle the fans for cleaning.
Proceed as follows:
1. Disconnect the inverter from both the DC and AC connections as described in section
7.2 "Opening the Inverter" (page 41).
2. Wait for the fan to stop rotating.
Cleaning the Fan Guards
3. Remove the fan guard:
– Press both latches on the right edge of the fan
guard to the right using a screwdriver and
loosen from the retainer.
– Carefully remove the fan guard.
4. Clean the fan guard with a soft brush, a paint brush,
a cloth, or compressed air.