It was reported that the double pump displayed the error message head error.No service order was provided.However according to the failure description the optical tacho board (part number 70100.7815) was exchanged and the pump worked normally.A similar complaint (b)(4) was already investigated on 2019-08-23.According to the life cycle engineering report# lce3993 dated in 2019-08-26 following was performed: the failure was reproducible and the most probable root cause is a broken wiring of the tachoboard.The reported failure "head error" could be confirmed.It is unknown when the event occurred, was the device being used for treatment or diagnosis of the patient.The hl20 in question was responsible for this complaint/event.The occurrence rate was calculated for the reported issue and it was determined that this is not a systemic issue.Therefore, no remedial action is required the occurrence rate related to the reported issue is currently being monitored as part of maquet cardiopulmonary¿s trending program and additional investigations or corrections will be implemented in case of adverse trending.
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