• Opening
1. Unscrew the 4 Philips screws of the bus
plug.
2. Unscrew and remove the 6 Philips screws
in the cover and lift the cover up carefully.
If necessary, press the bus plug down to
prevent the internal printed circuit boards
from moving or becoming loose. Do not
damage the cable through mechanical
stress.
• Closing
1. Replace the cover. Place the cables for the
operating voltage connection back into the
housing so that they are not clamped.
Tighten the Philips screws in the cover in
diagonally opposite sequence.
2. Tighten the bus plug screws.
VIFB6 - 03/05 3. Installation
9809c 3-17
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