10 Maintenance
SMA Solar Technology AG
38
MC_BOX_36-BE-en-20
Operating Manual
10 Maintenance
The Multicluster Box must be serviced at regular intervals. Note that the maintenance interval is
influenced by the mounting location and the ambient conditions. The Multicluster Box must be
serviced more frequently if it is installed in environments with severe dust pollution.
Danger to life due to electric shock
High voltages are present in the Multicluster Box and the multicluster system. Touching live
components results in death or serious injury due to electric shock.
Α Disconnect the multicluster system from all voltage sources before carrying out any work on
the Multicluster Box (see Section 9, page 37).
Risk of burns
Busbars and terminals in the Multicluster Box can get hot during operation.
Α Do not touch busbars or terminals.
Maintenance work
Recommended
maintenance
interval
Check the inside of the Multicluster Box for dirt, moisture and water
ingress.
Α If necessary, clean the Multicluster Box and take appropriate
actions.
12 months
Check stability of all connections. Disconnect the Multicluster Box from all
voltage sources (see Section 9, page 37).
Α Tighten connections if necessary (for torques: see Section 12,
page 41).
12 months
Check insulation, terminals and fuse elements for any discoloration or
visible changes.
Α If a customer-supplied cable, such as the load cable to the
Multicluster Box, shows discoloration or visible changes, replace it.
Disconnect the Multicluster Box from all voltage sources (see
Section 9, page 37).
Α If any internal wiring or a fuse element is discolored or shows visible
changes, inform the SMA Service Line.
12 months
