FANUC Alarm SRVO-336 — DCS RAMCHK alarm …,…
Manufacturer wording — DCS RAMCHK alarm %x,%x
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC SRVO-336 (“DCS RAMCHK alarm …,…”): A DRAM failure is detected. First check: Replace the CPU card. Likely part: Main board (Main CPU board) +1 more.
Updated 2026-09-17 · LogrobotLM reference
Description
A DRAM failure is detected.
Remedy
Replace the CPU card. Replace the main board. Refer to the troubleshooting section in the Controller Series Electrical Connection and Maintenance Manual.
Part to check / replace
FANUC SRVO-336 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
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 →