Matsuura help

At work I use a Matsuura RA-3F with an I-80 control. Recently the control has been locking me out, sometimes machine stops, sometimes it does not. Usually happens between pallet changes. Today it happened at a G0 command during tool change. Went to Feed Hold, I did not push anything. Last week it went to Emergency Stop, without the Emergency Stop being pushed. Any ideas on what is causing this?

Check the Loose Connection or The Control Voltage Circuit , See in Alarm Condition the Ladder you may find something .