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FANUC Alarm APSH-159 — WARN Servos are not ready

FANUC APSH-159 (“WARN Servos are not ready”): The servos are not ready, so operation requested cannot be performed. First check: When resetting a fault, wait for the servos to click on before attempting to execute a program.

Updated 2026-09-17 · LogrobotLM reference

Description

The servos are not ready, so operation requested cannot be performed.

Remedy

When resetting a fault, wait for the servos to click on before attempting to execute a program.

Related codes

APSH-157WARN Teach pendant must be enabledAPSH-158WARN No group output for weld schedAPSH-160WARN Robot not at POUNCE positionAPSH-161WARN No production style is running

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 →