2. Open the cover, if not already opened. Frame R4: see page 186, frame R5: see
page 194, frames R6…R9: see page 198.
3. To disconnect the internal EMC filters:
The DC EMC filter is disconnected by default with no screw or with a plastic
screw (3A).
The AC EMC filter is disconnected by default with no screw or with a plastic
screw (3B).
4. To disconnect the ground-to-phase varistor, remove the metal varistor screw
(4) or replace it with the plastic screw provided in the package.
182 Electrical installation – North America
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