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FANUC Alarm SYST-037 — ABORT Key switch broken

Error
Hardware
emergency stop and dual safety chains
Controllers
R-J3iB / R-30iA
FANUC class
ABORT.G
Hardware family
FANUC teach pendant, main board, CMOS and controller battery alarms

FANUC SYST-037 (“ABORT Key switch broken”): Improper input from Key switch First check: Please fix the CE Sign key switch

Updated 2026-10-22 · LogrobotLM reference

Description

Improper input from Key switch

Remedy

Please fix the CE Sign key switch

Field diagnosis

Inconsistent input from the key-operated mode select switch.

What to check

  • Repair or replace the mode select switch (CE specification).
  • Note: A switch caught between two positions gives this code intermittently.

Related codes

SRVO-233SERVO TP OFF in T1,T2/Door openSYST-042PAUSE DEADMAN defeatedSYST-035WARN Low or No Battery Power in PSU.SYST-036WARN Semi power failure recoverySYST-038PAUSE Operation mode T1 SelectedSYST-039PAUSE Operation mode T2 Selected

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 →