SMA SC 500HE-US Maintenance Manual - Manual (Page 32)

4 Maintenance SMA America, LLC
32 SC500HEUS-eng-WH-IUS120411 Maintenance Manual
1. Check whether all screw connections for the power cables are tight.
If screw connections are loose, tighten them with a torque wrench.
2. Check insulation and connections for discoloration or changes.
If insulation and connections are discolored or changed, contact the SMA Service Line.
3. Check screw connections for damage and contact elements for corrosion.
If screw connections are damaged or contact elements are corroded, contact the
SMA Service Line.
4.3.11 Retightening the Connection of the Power Cables Using
Cage Clamps (Optional)
Requirement:
☐ The inverter must be disconnected (see 4.3.1 "Disconnecting the Inverter", page 19).
C AC connection
D Protective conductor
/05*$&
Damage to screw connections from over-tightening
• Only apply the prescribed torque to tighten screw connections with the cage clamp option.
Torque specifications are shown in the inverter installation manual. Contact the SMA Service
Line if specifications are missing.
/05*$&
Inadequate screw connections due to harsh ambient conditions
• Check the screw connections for discoloration or changes more frequently in the case of
significant daytime temperature differences (see maintenance report).
Position Designation