Maintenance and Cleaning
SMA Solar Technology AG
54
SSMUS-TUS094511
Technical Description
9 Maintenance and Cleaning
The Sunny Central String-Monitor must be maintained at regular intervals. Maintenance includes:
• Inspection of wearing parts, and replacement thereof if necessary
• Functionality test of components
• Inspection of contact joints
• Cleaning of housing and interior if necessary
The maintenance intervals depend on the location and the ambient conditions. A device installed in
an environment with very dusty ambient air requires more frequent maintenance than indicated in the
following table.
Maintenance electrical connections
Maintenance housing
Maintenance work
Maintenance interval
(recommended)
Check all power cable connections for looseness and tighten them if
necessary. Check the connectors and insulation for discoloration or
degradation. Replace any damaged connectors or corroded contacts.
12 months
Check all string cable connections for looseness and replace them if
necessary. Check the connectors and insulation on the assembly and
busbars for discoloration or degradation.
12 months
Checking the shield connection
24 months
Checking the ground connection
12 months
Maintenance work
Maintenance interval
(recommended)
Check that the Sunny Central String-Monitor is mounted correctly
24 months
Check the screw fitting seals and that they are tightly fastened and replace
them if necessary
12 months
Check whether there is condensation water in the device
12 months
Check the installation location for accessibility, combustible materials, and
that the device is securely positioned
12 months
Check the adhesive warning labels and replace them if necessary.
24 months
Visual inspection of the housing for damage
12 months
