Alarm 157: The self-test of the MOCON has failed. Test +12, -12, and +5 volt power at MOCON PCB. Unreliable power from LVPS can cause this alarm. Check alarmhistory for Axis Drive Faults. Afaulty axis driver can cause fluctuated or imbalanced low volt power to logic stack. Problem may be caused by a shorted coolant level sensor, voltage sensor from vector drive, or thermocouple sensor from X-axis ballscrew (lathe). Disconnecting cables, one at a time, on P34, P26, , P27, P28, P17, P21, and P22, may isolate the problem.