This remediation mdr was generated under protocol (b)(4), as a result of warning letter cms#: (b)(4).No problems or issues were identified during this device history record review.A product sample was returned for evaluation and was found all intact with no external.The event history log (ehl) showed 1660 and high pressure messages.Visual and functional testing was performed.The reported issue was able to be duplicated.The pump was found to be displaying "1660" error code alarm message on power up when batteries are inserted during the investigation.Multiple high pressure after pump starting with an error code 1660 alarm messages were found in the pump's event history logs.The investigation found fluid ingression on pump by the chassis base of the downstream occlusion sensor.The microprocessor unit board and downstream occlusion sensor were replaced.The root cause of the issue was unable to be determined.
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