SMA MC-Box 6.3 - Manual (Page 36)

9 Maintenance SMA Solar Technology AG
36 MC-BOX-6_12-BE-en-20 Operating Manual
9 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.
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Danger to life due to electric shock
High voltages are present in the Multicluster Box. Touching live components can result in death or
serious injury due to electric shock.
• Disconnect the multicluster system from all voltage sources before carrying out any work on
the Multicluster Box (see Section 8, page 35).
Maintenance work Recommended
maintenance
interval
Check the inside of the Multicluster Box for dirt, moisture and water ingress.
• If necessary, clean the Multicluster Box and take appropriate measures.
Twelve months
Check stability of all connections. Disconnect the Multicluster Box from all voltage
sources (see Section 8, page 35).
• Tighten connections if necessary (for torques: see Section 11, page 38 or
Section 12, page 42).
Twelve months
Check insulation, terminals and fuse elements for any discoloration or visible
changes.
• If a customer-supplied cable, such as the load cable of the Multicluster Box,
shows discoloration or visible changes, replace it. Disconnect the
Multicluster Box from all voltage sources (see Section 8, page 35).
• If any internal wiring or a fuse element is discolored or shows visible
changes, inform the SMA Service Line.
Twelve months
Check the Multicluster Box for corrosion.
• Use touch-up sticks, paint brushes, spray paint or, alternatively, 2K-PUR
acrylic paint to repair minor surface damage. Observe the relevant
instructions of the paint manufacturer.
• Use touch-up paint or alternatively 2K-PUR acrylic paint to repair extensive
surface damage. Observe the relevant instructions of the paint
manufacturer.
Twelve months
Check door seals for damage.
• Replace damaged door seals.
Twelve months
To protect the door seals from damage due to freezing, treat the seals with a
protective agent (e.g. talcum, petroleum jelly or wax). Twelve months