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FANUC Alarm SYST-138 — WARN Motherboard not installed

Warning
Hardware
main board and memory
Controllers
R-J3iB / R-30iA
FANUC class
WARN
Hardware family
FANUC teach pendant, main board, CMOS and controller battery alarms

FANUC SYST-138 (“WARN Motherboard not installed”): The specified motherboard is not installed. First check: Specify only installed motherboards.

Updated 2026-10-22 · LogrobotLM reference

Description

The specified motherboard is not installed.

Remedy

Specify only installed motherboards.

Field diagnosis

The designated main board is not installed in the cabinet.

What to check

  • Only designate main boards that are actually fitted.
  • Note: Multi-board configuration.

Related codes

SYST-156SYSTEM Unknown hard wareSYST-136WARN System Time was resetSYST-137WARN Device not foundSYST-139WARN Invalid motherboard requestSYST-140WARN Invalid IRQ specified

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 →