SMA SC 500HE-20 Maintenance Manua - Manual (Page 25)

SMA Solar Technology AG 6 Maintenance Under Voltage-Free Conditions
Maintenance Manual SC500-800HE20-WH-en-10 25
Figure 7: Position of the power cabling
2. Check that all screw connections on the power cables are tight.
If screw connections are loose, tighten them with a torque wrench.
3. Check the insulation and connections for discolouration and changes to their appearance.
If the insulation or connections are discoloured or if there are changes to their appearance,
contact the SMA Service Line.
4. Check screw connections for damage and contact elements for corrosion.
If screw connections are damaged or contact elements are corroded, replace them.
Item Description
A Connection bar, earthing cables
B Connection lugs, AC cables
C Connection lugs, DC+ cables
D Connection lugs, DC‒ cables
1. %"/(&3
Danger to life from electric shock or electric arc when touching live components.
• Disconnect the inverter (see Section 6.1).