ABB Error 90821 — Motor contactor test failed

What it means · Ce que ça veut dire

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

The test of motor contactor 2 failed. No operation will be possible until the fault has been corrected and the system have been restarted. 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 Motor contactor test failed, 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 : This may be caused by faulty hardware.
• Make sure that all cables to the safety controller are properly attached.
• Restart the system and check if the error remains.
• If the error remains replace the motor contactor.

Frequently asked · Questions fréquentes

What does ABB error 90821 mean?

ABB 90821 (“Motor contactor test failed”): Motor contactor test failed — ABB robot hardware event on the Motor contactor test failed (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 90821?

Inspect the Motor contactor test failed, 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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