P3.3V
+3.3V Power Supply Fault
Fanuc · R-30iB Mate + Mate Plus Robot
What does P3.3V mean?
The P3.3V (Green) LED indicates that the internal power supply circuit of the servo amplifier is normally outputting +3.3 V. If this LED does not light, it signifies a failure in the +3.3V power supply within the servo amplifier, which is critical for its internal logic.
Repair Steps
- 1
Replace the servo amplifier.
Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot