I assume you're talking about the drawer mechanism. If so:
Start with the power, and if possible have the drawer stopped half open.
While holding the STOP/DRAWER button in, turn the power on. The unit will display start-up information, then "CALIBRATE', and the drawer will cycle in and out. If the drawer was stopped half open it will close, open, then close again. You may release the Stop button while the drawer is calibrating.
Start with the power, and if possible have the drawer stopped half open.
While holding the STOP/DRAWER button in, turn the power on. The unit will display start-up information, then "CALIBRATE', and the drawer will cycle in and out. If the drawer was stopped half open it will close, open, then close again. You may release the Stop button while the drawer is calibrating.