One cadd solis hpca pump was returned for analysis.Visual inspection performed, and product found to be in good condition.Event log review was performed and found evidence of reported problem.The pump was visually inspected and was tested for any signs of malfunction and pressure failure.The customer's reported problem was not verified.The pump did not alarm when the cassette was attached to the pump during testing.Investigator found contaminate on the downstream sensor during the visual inspection.Service replaced the downstream sensor as a preventive measure.The root cause of the reported problem is unknown.
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