ABB Error 39422 — Drive Unit watchdog timeout

What it means · Ce que ça veut dire

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

The time limit for watchdog timer for drive unit number arg in drive module arg has expired. 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 watchdog timeout, 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 connection to the drive unit may be bad or incorrect hardware may have been fitted.
• It may also be caused by an internal error in the drive unit.
• 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 39422 mean?

ABB 39422 (“Drive Unit watchdog timeout”): Drive Unit watchdog timeout — ABB robot hardware event on the Drive Unit watchdog timeout (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 39422?

Inspect the Drive Unit watchdog timeout, 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.

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