Abbott field service (fs) investigated the event on site and noticed the customer's quarterly maintenance was 4 months overdue.Fs trained the customer on the importance of performing maintenance on time.Fs addressed the issue by performing the quarterly maintenance and performing a preventative maintenance (pm) that was due.The customer then verified system performance by running calibrations and quality control testing.No subsequent reports involving erratic or inconsistent results have been received.A review of architect c4000 tracking and trending information did not identify any related issues or trends and the c4000 erratic result rate is within acceptable limits with no trends identified in the 12 month review period.Additionally, no related nonconformity for the architect c4000 were identified.A use error may have contributed to the issue as the customer's quarterly maintenance was overdue.Taken together, no systemic issue or deficiency was identified for the architect c4000.
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