SMA America, LLC Maintenance
Installation Guide SB30-40US-IUS103030 81
10 Maintenance
The Sunny Boy is designed to provide many years of trouble-free service. Performing regular
maintenance will help ensure the long life and high efficiency of your system.
10.1 Cleaning the fans
The fan intakes and handle covers should be cleaned periodically with a vacuum cleaner. Do not
blow air into the fan areas. For deeper cleanings, the fans can be removed completely.
The fan is mounted on the bottom side of the Sunny Boy. To clean or replace the fan please follow
the steps below:
1. Turn off all DC and AC disconnects and wait for 5 minutes for any residual voltages to dissipate.
2. Disconnect the Sunny Boy from both the DC and AC connections.
3. Wait for the fans to stop rotating.
4. Carefully remove the black plastic plate and filter in
front of the fan with the two plastic tabs on the right
border.
Clean the fan guard with a soft brush, a paint brush, a
cloth, or compressed air.
5. To release the fan press the front latches backwards
and the rear latches forwards.
6. Remove the fan by pulling it slowly and carefully
downwards.
7. Unlock and remove the plugs.
The fan cables are long enough for lifting the fans far
enough out to disconnect the internal plugs in the Sunny
Boy.
8. Remove the fan and clean it with a soft brush, a paint
brush, or a cloth and water.
Do not use compressed air as this can damage the fan.
9. To clean the fan use a soft brush or cloth. Do not use air pressure for cleaning the fan. This will
damage the fan.
10. When the fan is clean, reinstall it using the above steps in reverse order.
11. Do not blow air through the fan or the fan screens while the fan plate is assembled on the Sunny
Boy.
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