Haas Alarm 157 MOCON WATCHDOG FAULT
Alarm Description
The self-test of the MOCON has failed. Call your dealer. Test +12, -12, and +5 volt power at MOCON PCB. Unreliable power from LVPS can cause this alarm. Check alarm history for Axis Drive Faults. A faulty 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.
This information is for reference only. Haas is a registered trademark and the original is the property of Haas Automation, Inc.
Help the CNC Community: How Did You Fix It?
If you have encountered this Haas Alarm 157 MOCON WATCHDOG FAULT error code before or know a proven troubleshooting step to resolve it, please share your solution in the comments below.