SRVO-003: Deadman switch released
The pendant is enabled but the deadman switch isn't held at its middle position - either released entirely or squeezed too hard (the three-position switch stops the robot both ways, by design).
What it means
The pendant is enabled but the deadman switch isn't held at its middle position - either released entirely or squeezed too hard (the three-position switch stops the robot both ways, by design). Constant companion of anyone learning to jog a FANUC.
Common causes
Ranked by what technicians most often find, most likely first.
- Deadman not held, or gripped past the middle detent, while the pendant enable switch is ON.
- Pendant enable switch and mode switch in conflicting positions.
- Worn or faulty deadman switch in the pendant.
- Mode switch or its wiring faulty.
- E-stop board fault (last resort suspicion).
How to fix it
- Release the deadman fully, squeeze to the middle position, and press RESET.
- Confirm the pendant enable switch and the panel mode switch are where they should be for what you're doing.
- If it alarms with correct technique, test the deadman's intermediate detent - a worn switch loses its middle position.
- Persistent faults: pendant replacement first, then mode switch, then E-stop board.
Quick facts
- Category
- Servo
- Affected series
- R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
- Alarm family
- SRVO