Haas Alarm: 945 (M) APC-LIFT FRAME DOWN TIMEOUT – The pallet changer was commanded to lower but the down position switch was not contacted before the timeout period. Check for foreign objects under the lift frame. Verify there is an adequate supply of air pressure and air volume. Verify that Parameter 320 is correct. Check air solenoids for sticking and air release ports for clogging. Check pallet down position switch and wiring for damage, switch connections for positive electrical contact, and the lifting mechanism for proper operation. After determining the cause and correcting the problem, press Recover to enter pallet changer recovery, recover the pallet changer, and then continue operation. The H Frame down switch is accessed through an opening on the side of the W-Axis Torque Tube on EC-400s and EC-500s. Some sheetmetal will need to be removed to access this switch.