ALM LED ON
Hardware Defect Alarm
Fanuc · R-30iB Mate + Mate Plus Robot
What does ALM LED ON mean?
The red ALM LED is continuously illuminated, signifying an alarm within the unit of interest or a subsequent unit. This condition strongly suggests a hardware defect within the affected unit.
Repair Steps
- 1
Replace the unit where the ALM LED is continuously ON.
Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot