SMA SB 2500TL-21 Installation - Manual (Page 81)

SMA Solar Technology AG Troubleshooting
Installation Manual SB25-30TLST-21-IA-en-13 81
8. Close and earth the inverter:
– Place one conical spring washer over each
screw. The grooved side of the conical spring
washer must face the screw head.
– Attach the upper enclosure lid to the enclosure
and tighten the centre lower screw halfway. Use
an Allen key (AF 4) to do this.
– Secure the upper enclosure lid in the sequence
1 to 5 (torque: 6 Nm). Use an Allen key (AF 4)
to do this.
☑ The teeth of the conical spring washer press into
the upper enclosure lid. The lid is thus earthed.
9. Close the lower enclosure lid and commission the inverter again (see Section 8.3 "Closing the
Inverter" (page 60)).