SMA America, LLC
Maintenance and cleaning
Installation Guide
SB20_25_30HFUS-eng-IUS113711
71
9.1.1 Cleaning the fan
If the fan enclosure is soiled with loose dust, it can be cleaned using a vacuum cleaner. For locating
the fan refer to section "Lower view of the SMA DC-Disconnect" on page 42.
If you do not achieve satisfactory results with a vacuum cleaner, you can dismantle the fan for
cleaning.
If the enclosure and fan are dirtier, proceed as follows:
1. Disconnect the Sunny Boy from voltage sources (see section 8.1 ”Disconnect the Sunny Boy
from Voltage Sources” (page 65)).
2. Open the SMA DC Disconnect (see section 8.2 ”Open SMA DC Disconnect” (page 66)).
3. Unlock (1) and pull out (2) the fan socket.
4. Pull the handle of the fan bracket carefully
downwards, until the fan bracket is pulled out of its
guide rail.
☑ The fan and fan bracket are removed.
NOTICE
Damage to the fan during cleaning with compressed air.
• For cleaning the fan, only use a soft brush, a paint brush or a damp cloth.
