LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

FANUC Alarm SRVO-105 — SERVO Door open or E.Stop

Error
Hardware
emergency stop and dual safety chains
Controllers
R-J3iB / R-30iA / R-30iB
FANUC class
SERVO
Hardware family
FANUC emergency stop, pendant and dual safety chain alarms

FANUC SRVO-105 (“SERVO Door open or E.Stop”): The controller door has been opened, emergency stop signals have been detected for a short time, or a hardware connection has been mis-wired. First check: Close controller door and press RESET.

Updated 2026-10-22 · LogrobotLM reference

Description

The controller door has been opened, emergency stop signals have been detected for a short time, or a hardware connection has been mis-wired.

Remedy

Close controller door and press RESET. If the reset is not effective, correct the hardware connection.

Field diagnosis

Cabinet door detected open, or a transient emergency stop signal; a teach pendant of a different specification from the cabinet (RIA/CE versus standard) causes the same code.

What to check

  • Close the cabinet door (and the auxiliary cabinet door, if present), then reset.
  • Check the door switch and its wiring.
  • Verify that the connected teach pendant matches the safety specification of the controller.
  • Note: A teach pendant borrowed from another line is a classic cause of SRVO-105 appearing at power-up.

Related codes

SRVO-233SERVO TP OFF in T1,T2/Door openSRVO-207SERVO TP switch abnormal or Door openSRVO-230SERVO Chain 1 (+24v) abnormalSRVO-102SERVO Hand broken (Robot:…)SRVO-103SERVO Air pressure alarm(Rbt:…)SRVO-106SERVO Door open/E.Stop(Robot:…)

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →