Confirmed customer¿s complaint of device had a delivery accuracy issue.Tested device by running delivery accuracy test per performance verifcation test (pvt).Device failed with under delivery of 19.6.Review of device alarm log history found error code e380-plunger failure, was present.Replaced pwa driver board, app board, pressure detector sensor, fluid shield.Calibrated mechanism.Mechanism passed calibration.Device passed delivery accuracy test with 20.8.Devie passed self-test with no error alarms.Probable cause is worn pwa driver board, app board, pressure detector sensor.Additional initial reporter phone number: (b)(6).
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