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The device was returned for evaluation.Device event history and 12-month service history were reviewed, with no related alarms or previous repairs identified.Functional and visual testing was performed, and the reported issue could not be confirmed.A probable cause could not be determined.Following repair and calibration, verify air detector height - fail "air detector too high".Upon further investigation, identified a damaged battery compartment, broken pwa lcd connector, delaminated dso seal, and an improperly positioned air detector.
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