SMA STP 15000TL Service Manual - Manual (Page 35)

4. Tighten all four screws on the DC protective
cover with an Allen key (AF 3) in the sequence 1
to 4 (torque: 3 Nm ± 0.3 Nm).
5. Recommission the inverter (see Section 12, page 38).
10 Checking the Function of the Surge Arresters SMA Solar Technology AG
Service Manual 35 STP15-17TL-10-SG-en-10