Damage to bolted connections through overtightening
If the permitted torques are exceeded, bolted connections can be damaged. In this case, fault-free operation of the
inverter is no longer ensured.
• Only tighten loose bolted connections to the prescribed torque. Torque specifications are indicated in the circuit
Procedure:
1. Check that the bolted connections of all assemblies are securely in place.
If bolted connections are loose, tighten them using a torque wrench.
2. Check whether all bolted connections of the power cabling are securely in place.
If bolted connections are loose, tighten them using a torque wrench.
3. Check the insulation and connections for any discoloration or change in appearance.
4. Check the bolted connections for damage and contact elements for corrosion.
If bolted connections are damaged or contact elements corroded, replace them.
10.5.6 Checking the Surge Arresters
Figure 43: Position of the surge arresters
Position
Designation
A
Ready indicator
Additionally required maintenance material (not included in the scope of delivery):
☐ A surge arrester testing device approved by the manufacturer of the surge arrester such as the PM20 by DEHN +
SÖHNE GmbH + Co. KG.
10 Maintenance
SMA Solar Technology AG
System Manual
MVPS22JP-SH-en-11
148
Summary of Contents for 1000-1SC
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