An on-site visit by a service technician revealed visual evidence that the wall backing material was not sufficient to support the full weight of the unit resulting in the lag bolts pulling out of the wall.The expert dc installation manual (032-0204-en) provides instructions for proper device mounting based on the installer's assessment of the condition of the wall.The malfunction was determined to be the result of an improper installation.This concludes our investigation.Device not returned to manufacturer.
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