problem haas mikron vf500 alarm 160 low voltage

Good Morning. I have a problem with a haas mikron vf500 from 1995. the machine whenever you turn on the servos and the voltage 160vdc arrives at the main board the alarm occurs and there is no possibility to remove it. if you open the doors the alarm with reset disappears. I close the doors and the alarm occurs again. I already controlled the voltage 160vdc and is always at 170vdc. I need to know where this alarm is controlled because from what I checked it looks like it's on the PCB card where the 160vdc comes in. I have no solution to the problem. I appreciate who can help me. thanks