This preventive maintenance checklist helps technicians inspect and test uninterruptible power supply systems. Capture site details, equipment brand and model, power rating, serial number, and operating mode. Record visual inspection findings, fan operation, alarms and their details, and run diagnostic tests. Log key measurements including output frequency, battery voltage and charge, input and output voltages, and temperature. Perform a timed autonomy test to confirm runtime and document conclusions and recommended actions. Finish with end of intervention notes and signature to maintain traceability and ensure reliable backup power performance.
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