The autopulse platform (s/n (b)(4)) was returned to zoll on 05/26/2015.Investigation results as follows: visual inspection of the returned platform was performed and found that the top cover is cracked thus confirming the reported complaint.The front enclosure, bottom enclosure and battery lock were also damaged.The physical damage found during visual inspection is unrelated to the customer's reported complaint of the platform would not work.A review of the archive showed numerous user advisory 07 (discrepancy between load1 and load2 too large) faults on the occurrence date of (b)(6) 2015.Ua 7 message is displayed when the load sensing system has detected a weight/load imbalance between the two load cells.Note that the device does not need to be performing compressions for this to occur; it may happen at any time when the device is powered on.The platform was run for 15 minutes with test manikin and 15 minutes with lrtf with no problems during compressions.Additionally, the platform also passed load cell characterization testing.Both load cell modules are within specification.Based on the investigation the top cover, front enclosure, bottom enclosure and battery lock were replaced.The physical damages found during visual inspection can occur due to normal wear and tear and/or physical abuse.In summary the customer's reported complaint that the platform will not work was confirmed during archive review.The root cause for ua 7 observed during archive review cannot be determined as both of the load cell modules were within specification.There were no device deficiencies found during evaluation of the returned platform that could have caused or contributed to the reported complaint.After replacement of the parts identified during visual inspection, the platform passed all final functional testing criteria.
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