ABB Error 39403 — Torque Loop Undercurrent

What it means · Ce que ça veut dire

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

The torque-current controller detected too low current for joint arg, connected to drive module arg . 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 Torque Loop Undercurrent, 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 motor data in the configuration files may be wrong or the DC bus voltage may be too low.
• Check that the motor data in the configuration file is correct for this joint.
• The configuration data is described in Technical reference manual - System parameters.
• Check that no DC bus errors are present in the event log.
• Check that the incoming mains voltage is within the specification.

Frequently asked · Questions fréquentes

What does ABB error 39403 mean?

ABB 39403 (“Torque Loop Undercurrent”): Torque Loop Undercurrent — ABB robot hardware event on the Torque Loop Undercurrent (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 39403?

Inspect the Torque Loop Undercurrent, 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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