Siemens 6SL3825, Operating Instructions Manual, Page: 114 / 146

Final checks
1. Make sure that all the screws have been tightened with the correct torques.
NOTICE
Damage and/or short-circuits at the double submodules caused by an incorrect tightening
torque
If you do not comply with the screw tightening torques, then this can lead to damage and/
or short-circuits at the power cells.
● When installing the power cells comply with the specified torques.
Screw type Torque
M4 1.8 Nm
M5 3 Nm
For the M5 x 25 screws of the upper holding rail, a torque of 6 Nm
must be used (see step 4 of the description on removing).
M8 13 Nm
2. Check whether all of the couplings of the cooling water connections are correctly inserted
and interlocked (shift the plastic ring towards the front and insert the locking ring).
NOTICE
Damage to the gating unit if the locking ring is not inserted
The gating unit can be damaged if the flow of water through the heatsink is not guaranteed.
In order to guarantee a reliable flow of water through the heat sink, the locking ring must
be correctly inserted.
● After the water coupling has been interlocked, insert the locking ring into the slot
between the locking ring and the coupling.
● If the locking ring cannot be inserted, then check whether the water coupling is correctly
inserted and interlocked.
Note
Ventilating the deionized water circuit
Vent the deionized water circuit after replacing a power cell.
Maintenance
9.7 Repair
SINAMICS PERFECT HARMONY GH150 6SL3825
114
Operating Instructions 05/2020