ABB Error 20553 — AEXB board not OK
Error / Erreur🇫🇷 AEXB board not OK
ABB — CATALOGUE PRODUCTION
ABB 20553 (“AEXB board not OK”): AEXB board not OK — ABB robot hardware event on the AEXB board not OK (IRC5).
Updated 2026-08-29 · LogrobotLM reference
What it means · Ce que ça veut dire
AEXB board not OK — ABB robot hardware event on the AEXB board not OK (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.
Status active when serial communication towards AEXB is down. Le texte constructeur de ce code n'existe qu'en anglais dans les manuels ABB dont il provient. Il est reproduit tel quel ci-dessus ; le manuel de votre robot fait foi.
What to check · Que vérifier
- Inspect the AEXB board not OK, its wiring and connections first.
- Match this code against your robot's event-log timeline before swapping parts.
- Follow the French field checks below — they are the tested sequence for this fault.
- Check cables towards AEXB board.
- Replace AEXB board.
- Replace ACCB board.
Frequently asked · Questions fréquentes
- What does ABB error 20553 mean?
- ABB 20553 (“AEXB board not OK”): AEXB board not OK — ABB robot hardware event on the AEXB board not OK (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.
- How do you troubleshoot ABB error 20553?
- Inspect the AEXB board not OK, its wiring and connections first. Match this code against your robot's event-log timeline before swapping parts. Follow the French field checks below — they are the tested sequence for this fault.
Related codes / Codes liés
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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →