SMA 20000TL Service Manual - Manual (Page 31)

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 11 "Recommissioning the Inverter", page 34).
9 Checking the Function of the Surge Arresters SMA Solar Technology AG
Service Manual for Installers 31 STP20-25TL-SG-en-11