Turn the power switch to OFF

Unplug the power cable

Using an M2 hex, remove the 5 button head screws holding the control box bottom cover on.

using an M2.5 hex, remove the 4 button head screws holding the power supply to the control box.

Lay the power supply to the side as shown.

Remove the grommet from the rear of the control box and pull back a few inches as shown.