10 Warning Signs Your UPS May Need Attention

A UPS can continue supplying power while still showing signs that it needs attention, maintenance or further investigation.

Recurring alarms, unexpected bypass events, reduced battery runtime and changes in the event log can all provide useful information about the condition of an uninterruptible power supply.

Recognising these signs gives facilities managers an opportunity to investigate the cause and decide what action may be appropriate.

UPS warning signs at a glance

Repeated alarms may indicate an unresolved operating condition or fault.

Unexpected bypass events should be investigated to establish why the transfer occurred.

Recurring fault codes may point to an issue recorded by the UPS.

Reduced battery runtime can indicate a change in battery condition.

Physical battery deterioration, including damage or leakage, requires attention.

Increased heat or noise can indicate a change from normal operation.

Unexpected shutdowns should always be investigated.

Ageing equipment may need its condition and future requirements reviewed.

Changes to the electrical load can mean UPS capacity needs reassessing.

A lack of recent maintenance history can make the current condition of the system difficult to determine.

1. Repeated alarms or warning messages

A single UPS alarm does not necessarily mean the system is failing.

However, repeated or unresolved warnings deserve closer attention, particularly if the same message keeps appearing.

UPS alarms can relate to several operating conditions, including the mains supply, battery, temperature, overload or bypass.

The display and event history can help establish what has happened.

Record recurring warnings and check the manufacturer’s guidance for the specific UPS model.

If the cause is not clear, the system should be investigated.

Adept Power provides UPS maintenance and support, including remote monitoring for systems that require ongoing oversight.

2. The UPS is entering bypass unexpectedly

A UPS can transfer to bypass under certain operating conditions, and bypass can also be used during planned maintenance.

An unexpected or repeated transfer should be investigated to establish why it occurred.

The UPS event history can help identify when the transfer happened and what conditions were recorded at the time.

Adept Power also supplies UPS bypass switches, allowing a UPS to be isolated for maintenance and testing when correctly installed and operated.

3. Fault codes are appearing in the event log

The UPS event log can reveal issues that are not obvious from the front of the unit.

A fault code that appears once may require a different response from one that keeps returning.

Looking at the wider history can help identify recurring issues and establish what was happening when they occurred.

Keep records of significant alarms and faults.

Recurring codes should be investigated before they are cleared.

Adept Power’s UPS maintenance service includes checks of UPS systems and their operating condition.

4. Battery runtime has reduced

UPS batteries can deteriorate gradually, so a change in runtime may not be obvious during normal operation.

Adept Power states that, under recommended conditions, a UPS battery typically has a lifespan of around three to five years.

Actual battery life depends on several factors, including the operating environment and how the battery is used.

Battery age alone does not confirm its condition.

Impedance testing can help identify individual weak batteries within a string and support maintenance or replacement decisions.

Adept Power provides UPS battery impedance testing and replacement services.

5. Batteries show physical signs of deterioration

Physical inspections can reveal issues that require further investigation.

Swelling, leakage, corrosion or damaged connections should not be ignored.

Adept Power recommends checking batteries for signs such as swelling and leaks as part of routine UPS battery care.

If batteries show swelling, leakage, corrosion or damaged connections, arrange a professional assessment rather than attempting to handle or repair them yourself.

Adept Power provides battery testing, replacement and temperature logging.

6. The UPS is running hotter or louder than usual

Cooling fans operate as part of normal UPS operation, so fan noise alone does not indicate a fault.

However, a noticeable change in noise, increased heat around the equipment or repeated high-temperature warnings can warrant investigation.

The area around the UPS should also remain clean, dry and free from obstructions that could restrict ventilation.

Adept Remote Monitoring can provide alerts for events including high temperatures and fan issues, giving site teams greater visibility of their UPS system.

7. The UPS has shut down unexpectedly

An unexpected shutdown should be investigated, particularly if connected equipment has been affected or has lost power.

There can be several possible causes, so the UPS event history is a useful starting point.

Record what happened, note any alarms or fault codes and have the system assessed if the cause is not clear.

Adept Power provides UPS repairs, servicing and maintenance.

8. Your UPS is getting older

Age alone does not mean a UPS needs replacing.

An older system may continue operating reliably, but its condition, component condition, service history and site requirements should all be taken into account.

Review the equipment’s history and condition as part of your UPS maintenance planning.

An assessment can help establish whether continued servicing is appropriate or if an upgrade or replacement should be considered.

9. The site’s electrical load has changed

Has your site added new equipment since the UPS was installed?

Changes in connected equipment can alter the load placed on a UPS and affect the runtime available from its batteries.

A system that was correctly sized when first installed may need to be reassessed after significant changes to the site’s power requirements.

Keep an accurate record of connected loads and review UPS capacity when major changes are made.

Adept Power recommends annual UPS load bank testing to assess the UPS and battery system under a controlled load.

10. There is no recent maintenance or testing history

A UPS can appear to be operating normally without giving a clear indication of how it will perform during a power failure.

Maintenance records provide a history of inspections, battery checks, testing, faults and previous work.

Without this information, it becomes harder to identify changes over time.

Check when the UPS was last serviced and whether battery testing and previous faults have been recorded.

If there is little or no recent history, an assessment can help establish the current condition of the system.

Adept Power recommends professional UPS maintenance at least once a year, with the exact schedule depending on factors such as system size, usage and manufacturer guidance.

Do not wait for a UPS failure to investigate the warning signs

A UPS does not need to stop working completely before it requires attention.

Recurring alarms, bypass events, changes in battery runtime and gaps in maintenance records can all provide reasons to investigate.

Regular UPS maintenance, battery testing and monitoring can give facilities managers better visibility of their equipment and help inform future maintenance decisions.

If you are concerned about the condition of an existing UPS, contact Adept Power to discuss your requirements.

Frequently asked questions

What are the common signs of UPS failure?

There is no single warning sign that confirms a UPS is going to fail.

Recurring alarms, unexpected bypass transfers, changes in battery runtime, repeated fault codes and unexpected shutdowns can all indicate that the system requires investigation.

How do I know if my UPS battery needs replacing?

Battery age, runtime, physical condition and test results can all help determine battery condition.

Impedance testing can identify individual weak batteries and help inform replacement decisions.

What does it mean when a UPS goes into bypass?

A UPS can use bypass under certain operating conditions or during planned maintenance.

An unexpected or repeated transfer should be investigated to establish why it occurred.

How often should a UPS be serviced?

Adept Power recommends professional UPS maintenance at least once a year.

The appropriate schedule can vary depending on the system, its usage, environment and manufacturer guidance.

For more information on 10 Warning Signs Your UPS May Need Attention talk to Adept Power Solutions Ltd