10 General Maintenance Work
SMA Solar Technology AG
Operating manual
MC-BOX-6-3-BE-en-30
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5. If any connections are not tightened with the correct torque, tighten with a suitable torque
wrench.
6. Check all power cables on the product for discoloration or changes in the appearance of the
insulation.
7. If any power cables are discolored or the appearance of the insulation has changed, replace
these power cables.
8. Check all insulated conductors, terminals and fuse elements in the product for discoloration or
changes in the appearance of the insulation.
9. If any insulated conductors, terminals or fuse elements in the product are discolored or have
changed in appearance, contact Service (see Section 14, page 36).
10. Check whether the product is free of corrosion damage.
11. If the product displays minor corrosion damage, treat the affected area as follows:
• Sand the area.
• Clean the area with degreaser.
• Paint the area.
12. If the product displays large-scale corrosion damage, treat the entire surface as follows:
• Sand the surface.
• Clean the entire surface with degreaser.
• Paint the entire surface.
13. Check whether all seals on the cabinet door are undamaged.
14. If a seal is damaged, replace the seal.
15. Apply talcum, petroleum jelly or wax to seals. This will prevent frost damage.
