ABB Error 31602 — EPROM memory fault
ErrorABB 31602 (“EPROM memory fault”): Checksum error on the lower EPROM (LOW PROM) of the computer board. Likely part: EPROM memory.
Updated 2026-10-22 · LogrobotLM reference
What it means
Checksum error on the lower EPROM (LOW PROM) of the computer board.
What to check
- Replace the faulty EPROM chips on the robot control board.
- Note: Removable EPROM fault, obsolete.
Part to check / replace
ABB 31602 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 →