ABB Error 34404 — DC link voltage is critically high

What it means · Ce que ça veut dire

DC link voltage is critically high — ABB robot hardware event on the DC link voltage is critically high (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

In drive module arg , the drive unit at unit position arg has a DC link voltage that is critically high. No operation will be possible until the fault is corrected. The system goes to Motors Off state with zero torque. WARNING HIGH VOLTAGE: THE DC LINK MAY BE DISCHARGED VERY SLOWLY (APPROXIMATELY 1 HOUR) WHEN THE SYSTEM IS POWERED OFF. 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 DC link voltage is critically high, 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 : - 1 The bleeder resistor is not connected or faulty.
• - 2 The user program may contain too much deceleration of the manipulator's axes.
• This fault is more likely if the system contains additional axes.

Frequently asked · Questions fréquentes

What does ABB error 34404 mean?

ABB 34404 (“DC link voltage is critically high”): DC link voltage is critically high — ABB robot hardware event on the DC link voltage is critically high (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 34404?

Inspect the DC link voltage is critically high, 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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