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Related Information
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OLr: Overload (Braking resistor)

Cause:
1) The braking rate is large.
2) The deceleration time is too short.
3) The braking resistor resistance is too low.

Clearing:
• Increase the deceleration time. [dEC: Deceleration time 1], etc.
• Change the braking resistor (external option) to a larger capacity, and set [F309: Braking resistor capacity] appropriately.
Discussion
Dynamic braking resistors are connected to a chopper circuit across the DC bus to help bleed off excess energy in the form of heat. If the resistor is improperly sized or the ASD is not configured correctly, the resistor may overheat or this fault may occur.

Please reference latest AS3 Instruction Manual more details or latest information.

AS3 fault codes, descriptions, symptoms and suggested remedies can be found in the below links. Each fault code can also be linked to directly from the AS3 by accessing the QR code on a mobile device while the AS3 is currently experiencing the fault.

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