FANUC Alarm SYST-035 — WARN Low or No Battery Power in PSU.
Warning- Hardware
- backup batteries
- Controllers
- R-J3iB / R-30iA
- FANUC class
- WARN
FANUC SYST-035 (“WARN Low or No Battery Power in PSU.”): Battery in PSU board is low in power. First check: Replace the Old Battery with a new battery of same kind. Likely part: Backup battery (Backup battery).
Updated 2026-10-22 · LogrobotLM reference
Description
Battery in PSU board is low in power.
Remedy
Replace the Old Battery with a new battery of same kind.
Field diagnosis
The battery on the power supply board/main board is low: the working memory is no longer protected in the event of a power failure.
What to check
- Replace the battery with one of the same type, with the cabinet powered on so as not to lose the memory.
- Note: Not to be confused with the Pulsecoder batteries in the robot base (SRVO-065).
Part to check / replace
FANUC SYST-035 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 →