This guide covers best practices for maintaining EDFA, Raman, and SOA amplifiers, along with solutions to common issues. Diagnosis: Monitor pump current and compare to baseline values. We inspected the status of each amplifier inside the electrical cabinet. These mechanisms take the form of FANUC alarm codes—essential diagnostic tools that signal issues within drives, motors, or controller subsystems. So, what are FANUC alarm codes, and why are they critical to effective CNC troubleshooting? Fanuc alarm codes are structured error messages triggered by. Figure 1: FANUC servo amplifier module. 3) This alarm may be brought by other amplifier alarms (low voltage alarm, etc. Faulty Connectors: Loose or damaged connectors can prevent proper signal transmission.