SMA Solar Technology AG
Maintenance and Cleaning
Installation Guide
SB11_17-IEN084820
33
8 Maintenance and Cleaning
Check the correct operation of the Sunny Boy at regular intervals. Impurities such as dust or airborne
blossoms can cause heat concentration that can lead to yield losses. Also check the Sunny Boy and
the cables for visible external damage. Undertake repairs if necessary.
8.1 Cleaning the Cooling Fins
The heat dissipation of the product can be restricted by unclean cooling fins.
• Clean the cooling fins with a suitable, soft brush.
8.2 Checking the Electronic Solar Switch for Wear
To check the Electronic Solar Switch for wear, proceed as follows:
1. Remove the Electronic Solar Switch.
2. Check whether metal tongues inside the connector have a brown discoloration or are burned
off.
☑ If all metal tongues are in acceptable condition (as illustrated above), the Electronic Solar
Switch can continue to be used.
☑ If at least one of the metal tongues has a brown discoloration or is completely burned off (as
illustrated below), proper functioning of the Electronic Solar Switch is no longer guaranteed.
3. Replace the defective Electronic Solar Switch before reactivating the Sunny Boy. You can
purchase replacements from SMA Solar Technology (see section 12 „Accessories“ (43)).
CAUTION!
Danger of burn injuries due to hot housing parts!
• Do not touch the housing of the Sunny Boy during operation.
