SMA Solar Technology AG GRID-CONNECT-BOX 12, Operating Manual, Page: 30 / 40

10 Maintenance SMA Solar Technology AG
30 GRID-BOX-12-3-20-BE-en-11 Operating Manual
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 assumed 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 color: 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
Maintenance work
• Check whether the inside of the Grid-Connect-Box is soiled or moist.
If the inside of the Grid-Connect-Box is dirty, clean the Grid-Connect-Box.
If the inside of the Grid-Connect-Box is moist or water has accumulated, dry the Grid-Connect-Box out.
• Check all Grid-Connect-Box power cables for discoloration or changes in the appearance of the insulation.
If any power cables are discolored or the appearance of the insulation has changed, replace these power cables.
• Check all insulated conductors, terminals and fuse elements in the Grid-Connect-Box for discoloration or changes
in the appearance of the insulation.
If any insulated conductors, terminals or fuse elements in the Grid-Connect-Box are discolored or have changed in
appearance, contact Service (see Section 13, page 35).
• Check whether the Grid-Connect-Box is free of corrosion damage.
If the Grid-Connect-Box displays minor corrosion damage, treat the affected area as follows:
• Sand the affected area.
• Clean the affected area with degreaser.
• Paint the affected area.
If the Grid-Connect-Box displays large-scale corrosion damage, treat the entire surface as follows:
• Sand the surface.
• Clean the entire surface with degreaser.
• Paint the entire surface.
• Check all door seals for damage.
If a door seal is damaged, replace this door seal.
• Apply talcum, petroleum jelly or wax to the door seals. This will prevent frost damage.