01
Check the UPS operating status
Confirm that the UPS is operating in its expected mode and that
the display or monitoring system shows normal status.
A UPS being powered on does not automatically
mean that everything is healthy. An unexpected battery mode,
bypass condition or active alarm can require investigation.
Record: operating mode, alarm message or
relevant status indication.
If abnormal: follow the site's escalation
procedure rather than assuming the condition will clear itself.
02
Check input and output readings
Record the input and output voltage and current required by your
site's inspection procedure. Three-phase UPS systems may require
phase-wise readings.
Record the actual value, then compare it with
the applicable manufacturer/site limits and previous records.
Best practice: Avoid putting a single generic
“normal UPS voltage” value into a universal checklist.
03
Check the UPS load
Record the load shown by the UPS or monitoring system.
Tracking load over time helps the facility team understand how
the UPS is being utilized and identify unexpected changes.
Record: load percentage or the value displayed
by the system.
04
Check battery condition
Battery condition should be treated as a separate inspection
point.
Check battery status and the readings or test results required
by the equipment procedure. Where accessible and safe to inspect,
look for swelling, leakage, corrosion or damaged cables.
Important: Detailed battery testing, internal
access and electrical work should be performed only by trained
and authorized personnel.
05
Check cooling and the UPS room
Inspect UPS cooling fans, ventilation and air-conditioning
serving the UPS room. Confirm that airflow is not obstructed.
Also check whether the room is clean, dry and free from
obstructions or unnecessary materials.
Look for: unusual heat conditions, blocked
ventilation or anything affecting the equipment environment.
06
Check alarms and fault indications
Check the UPS display, alarm panel or monitoring system for
active alarms.
If an alarm appears, record the actual alarm message or
code rather than writing only “UPS alarm.”
Also review: whether the same alarm has appeared
repeatedly.
07
Check for abnormal noise or visible changes
During a routine inspection, look and listen for changes from
the previous condition.
Examples include new or unusual noise, visible overheating or
discoloration, damaged insulation, leakage, physical damage or
unusual fan behavior.
Goal: identify a condition that deserves
attention rather than attempting to diagnose an internal fault.
