CDX / RMX Control Board | 111883.0001.S

In the box: circuit board, hold down pin, 4 hold down screws.

Tools: common screwdriver, 1/4 in. nutdriver, pliers. About 30 minutes.

1. RMX (MX) only: if you can, run the door to about mid-position first. This keeps the limit wheels clear of the board.
2. Remove power with lockout/tagout and open the main electric panel cover.
3. Mark where every control wire sits on the terminal strip, then remove them.
4. Unplug the harnesses: transformer, motor, brake, hoist, radio on RMX; transformer, power input, AOM, motor, limit module, radio on CDX.
5. Remove the 4 mounting screws, squeeze the locator pin with pliers, and pull the board out. On RMX, slide it sideways to free the optical sensors from the limit triggers.
6. Replace the locator pin, snap the new board in place, and reinstall the 4 screws.
7. Plug the harnesses back in, then reconnect the control wires using your marks or the diagram on the electric box cover.
8. Reset all board parameters (limits, close direction, modes). See section 6 of the operator manual.

Note: on RMX units that can't be moved to mid-position, you may need to release the limit locking bar and move the limit travel wheels. Note where they were so you can reset them after the new board is in.