Fanuc alarm
On older Fanuc controls, 414 is a catch-all alarm: the digital servo found a problem in an amplifier or motor.
On older Fanuc controls, 414 is a catch-all alarm: the digital servo found a problem in an amplifier or motor. The real reason is in the servo diagnostics (around diagnostic numbers 200 to 204) and on the amplifier's display. Newer controls split this into more specific SV alarms.
Lock out the machine before reaching into it. Never bypass a door switch or interlock to clear an alarm.
Most 414 alarms need a tech with a megohmmeter to test the motor and cable, and someone who can read the Fanuc diagnostics. Have your photos ready when you call.
CNC, press brake and full machine repair across Illinois and Wisconsin
Alignment & Laser Calibration · Control & Electronics Repair · Crash Recovery · Hydraulics & Lubrication · Machine Moving & Installation · Press Brake & Fab Equipment
On-site CNC and plant equipment repair across Illinois, with 30+ years of tech experience
Control & Electronics Repair · Crash Recovery · Hydraulics & Lubrication · Press Brake & Fab Equipment · Preventive Maintenance · Retrofits & Control Upgrades
Wisconsin-owned CNC repair with teams in Milwaukee, Madison and Green Bay
Control & Electronics Repair · Crash Recovery · Hydraulics & Lubrication · Press Brake & Fab Equipment · Preventive Maintenance · Retrofits & Control Upgrades
On older Fanuc controls, 414 is a catch-all alarm: the digital servo found a problem in an amplifier or motor. The real reason is in the servo diagnostics (around diagnostic numbers 200 to 204) and on the amplifier's display. Newer controls split this into more specific SV alarms.
Overcurrent in the amplifier, often from a shorted motor or cable. Coolant inside the servo motor or its connector. Axis overload from binding. Encoder or feedback cable fault. Failed amplifier power module.
Write down what the amplifier's LED display shows. Open the diagnostic pages around 200 to 204 and photograph them for the tech. Look at motor cables for cuts, chafing or crushed spots, especially in the cable carrier. Look for coolant around the motor connectors. Don't keep resetting it. Repeated resets on a shorted motor can take out the amplifier. Most 414 alarms need a tech with a megohmmeter to test the motor and cable, and someone who can read the Fanuc diagnostics. Have your photos ready when you call.
Alarm numbers and text can differ by control model, software version and machine builder. This page is a starting point from people who have worked on these machines, not a replacement for your machine builder's manual.
Free for shops that need a repair. We pass your request to repair techs who cover your area and fix your brand. They reach out to you directly.
The leading CNC machine repair directory and a leading machine shop and repair magazine. We help shop owners, consumers and manufacturers find trusted repair, and keep the industry informed with the latest news, trends and headlines. Run by people who have worked in machine shops and run maintenance.
