The cause for this is usually incorrect installation of the Communication Switch Assembly.
- First ensure that the silver colored shaft coming down vertically from the SDE switches is free to move up and down. If not, grasp the shaft with a needle-nose plier and move it up and down until it is free.
- If this doesn't correct the issue, remove and re-install it per the linked instruction bulletin 48049-139-02.
Released for: Schneider Electric USA


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