The complaint was escalated for technical complaint investigation and the results indicate that there was a failure of a capacitor inside a riello ups delivered by the third party.The capacitors got leaky and led to the generation of smoke (which led to the visible blackened parts) which emitted a burning smell and was sensed by the customer.The ups is an electronic power product, the common failure mode of power electronics often resulting in a burning smell, smoke and blackened components.Note that large electrolytic capacitors as used in this ups are designed to withstand the failure mode "overheating" should that occur and are therefore equipped with a pressure relief valve.This eliminates the possibility for these kinds of capacitors to e.G.Explode.As an immediate containment the 3rd party ups was disconnected and bypassed, so the mains power supply could remain connected to the mri system, and the mri system was then fully functional again.In terms of corrections, the 3rd party ups supplier riello went on site and repaired the impacted ups damaged parts, made the ups functional again and handed it back over to the customer with a sufficient performance analysis.The supplier riello will take corrective actions to resolve the issue with a firmware update in the riello mst 125 ups, and all upss of the same type.
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