SMA Solar Technology AG
10 Maintenance
Operating Manual
MC-BOX-12-3-20-BE-en-10
37
10.2 Maintenance Work every 12 Months
Required maintenance materials and tools:
Only those consumables and maintenance materials not normally included in the standard equipment of an electrically
qualified person are listed below. It is taken for granted that standard tools and materials such as torque wrenches are
available for all maintenance operations.
To repair minor surface corrosion damage: touch-up sticks, paint brushes, spray paint or, alternatively, 2K-PUR
acrylic paint (RAL-Farbe: 7035)
To repair large-surface corrosion damage: touch-up sticks or, alternatively, 2K-PUR acrylic paint (RAL-Farbe: 7035)
Abrasive cloth
Degreaser
For maintaining the seals: talcum, petroleum jelly or wax
Procedure:
'$1*(5
Danger to life due to electric shock
High voltages are present in the Multicluster Box and the multicluster system. Touching live components can result in
death or serious injury due to electric shock.
• Disconnect the Multicluster Box and multicluster system from all voltage sources before carrying out any work on
the Multicluster Box (see Section 8, page 28).
The ambient conditions influence the maintenance intervals
Geographic location and ambient conditions influence the length of maintenance intervals. More frequent cleaning
and corrosion protection work may be necessary in adverse ambient conditions.
• If the Multicluster Box is subject to adverse ambient conditions, SMA Solar Technology AG recommends
carrying out maintenance work more frequently.
• SMA Solar Technology AG recommends performing an optical inspection once a month to determine
maintenance needs.
Maintenance activities
• Check whether the inside of the Multicluster Box is soiled or damp.
If the inside of the Multicluster Box is dirty, clean it.
If the inside of the Multicluster Box is moist or water has accumulated, dry it out.
• Check that all connections have been tightened with the correct torque (see Section 12 "Technical Data",
page 40)
If any connections are not tightened with the correct torque, tighten with a suitable torque wrench.
• Check all power cables of the Multicluster Box for discoloration or changes in appearance of the insulation.
If any power cable is discolored or the insulation looks changed, replace the cable.
• Check all terminals and fuse elements in the Multicluster Box for discoloration or changes in appearance of the
insulation.
If any terminals or fuse elements in the Multicluster Box are discolored or changed, contact the SMA Service Line
