Haas Alarm: 629 (M) APC-PIN CLEAR/HOME SWITCH FAULT – A pin clear switch was contacted when all pallets were at their home positions. The most likely cause is debris on a switch. Check for accumulation of debris on the pin clear switches and the pallet home switches. Check switches and their electrical wiring for damage. After correcting the condition run M50 (with P code for the pallet to be loaded) to continue machining.