APC PM4 Surge Protector User Manual


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Preventive Maintenance - Inspection and Cleaning
Inspection of the SPD should be performed periodically to maintain reliable system performance and continued tran-
sient voltage surge protection. While it is difficult to establish a preventive maintenance schedule because conditions
vary from location to location, inspections for failed modules and other signs of trouble utilizing the built-in diagnos-
tics should be performed on a routine basis (weekly or monthly).
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