Haas Alarm: 630 (M) APC-DOOR SW FAULT-SWITCH NOT EQUAL TO SOLENOID – The APC Door Switch indicates the door is open but the solenoid shows the door has been commanded to close. Either the door failed to close and is stuck or the switch itself is broken or stuck. The door switch wiring may also have a fault. Check switch then cable. After correcting the condition, run M50 to continue machining.