ABB Error 39420 — Drive Unit built in test failure

What it means · Ce que ça veut dire

Drive Unit built in test failure — ABB robot hardware event on the Drive Unit built in test failure (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

Drive unit number arg in drive module arg has detected an internal hardware failure. No operation will be possible until after correcting the fault. The system goes to status SYS HALT. 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 Drive Unit built in test failure, 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.
• probable : The test software is not working correctly, or the actual hardware is faulty.
• Perform a shutdown and then restart the controller.
• If the problem persists, isolate the faulty drive unit and replace it.

Frequently asked · Questions fréquentes

What does ABB error 39420 mean?

ABB 39420 (“Drive Unit built in test failure”): Drive Unit built in test failure — ABB robot hardware event on the Drive Unit built in test failure (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 39420?

Inspect the Drive Unit built in test failure, 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