On (b)(6) 2011, at (b)(6), the customer reported that after the twin pump module tpm 20-330, twin roller pump (article number: 70102.8694, serial number: (b)(4)) attached to the hl20 is configured as cardioplegia (left pump) and cardioplegia-slave (right pump) that over time the configuration then returns to the default free mode.In addition, the cardioplegia-slave has displayed an "rpm-diff" error message.The hospital reported this to the maquet service representative on (b)(6) 2011.(b)(4).
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(b)(4).Maquet cardiopulmonary ag provides product failure investigation, analysis, and resolution for the device described in this report.The service technician checked both pump head speeds and verified pump head speeds.There is no documentation that any repair was performed.The device was not returned to the manufacturer.(b)(4).
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