ABB Error 31502 — Backup battery fault
ErrorABB 31502 (“Backup battery fault”): The voltage of the cabinet axis backup battery 2 is too low. Likely part: Backup battery (Backup battery).
Updated 2026-10-22 · LogrobotLM reference
What it means
The voltage of the cabinet axis backup battery 2 is too low.
What to check
- Replace backup battery 2 immediately to avoid loss of calibration.
- Note: Equivalent to the discharged SMB backup battery (38200) on IRC5.
Part to check / replace
ABB 31502 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 →