10 General Maintenance Work
SMA Solar Technology AG
Operating manual
MC-BOX-6-3-BE-en-30
27
10 General Maintenance Work
The general maintenance work must be performed every twelve months.
DANGER
Danger to life due to electric shock when live components or cables are
touched
High voltages are present in the conductive components or cables of the product. Touching live
parts and cables results in death or lethal injuries due to electric shock.
• Do not touch non-insulated parts or cables.
• Disconnect the product from voltage sources and make sure it cannot be reconnected
before working on the device.
• Wear suitable personal protective equipment for all work on the product.
Adverse ambient conditions reduce maintenance intervals
Location and ambient conditions influence the maintenance intervals. Note that cleaning and
corrosion protection may be required more frequently depending on the conditions at the
installation site.
• If the product is subject to adverse ambient conditions, a reduction of the maintenance
intervals is recommended. Above all, the intervals between cleaning work and corrosion
protection should be reduced.
• SMA recommends a monthly optical inspection to determine the maintenance
requirement.
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. It is taken for granted that standard tools
and materials such as torque wrenches, one-contact voltage testers and wrenches will be 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 color: 7035)
☐ Abrasive cloth
☐ Degreaser
☐ For maintaining the seals: talcum, petroleum jelly or wax
Procedure:
1. Check whether the inside of the product is soiled or moist.
2. If the interior of the product is dirty, clean the product.
3. If the interior of the product is moist or water has accumulated, dry the product out.
4. Check whether all connections have been tightened with the correct torque (see Section 12,
