Maintenance 111
Checking and cleaning the power connections (R8i,
2 × R8i, 3 × R8i)
WARNING! Obey the safety instructions, page 11. If you ignore the instructions,
physical injury or death, or damage to the equipment can occur.
1. Stop the inverter and do the steps in section Precautions before electrical work on
page 12 before you start the work.
2. Open the inverter cubicle door.
3. Extract one inverter module from the cabinet as described in section Replacing the
inverter module (frames R8i, 2 × R8i, 3 × R8i).
4. Check the tightness of the busbar connections at the quick connector. Use the
tightening torque tables in chapter Technical data.
5. Clean all contact surfaces of the quick connector and apply a layer of suitable joint
compound (eg, Isoflex
®
Topas NB 52 from Klüber Lubrication) onto them.
6. Re-insert the inverter module.
7. Repeat steps 4 to 7 for all remaining inverter modules.
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