Overload
Advice UPS (Uninterruptible Power Supply)
Severity: ModerateWhat Does This Error Mean?
An overload warning on an Advice UPS means the total power draw of all connected devices exceeds the UPS's rated capacity. The UPS is protecting itself and your devices by sounding the alarm. If the overload is not reduced, the UPS will shut down to prevent damage to itself and the connected equipment.
Affected Models
- Advice UPS Line-Interactive Series
- Advice UPS Online Series
- Advice UPS (all models)
Common Causes
- Too many devices connected — total watt draw exceeds the UPS VA/watt rating
- A device with a high startup current (motor, compressor, laser printer) causing a momentary overload
- UPS capacity is undersized for the equipment it is protecting
- A device connected to the UPS has developed a fault and is drawing excessive current
- Battery backup outlets and surge-only outlets confused — heavy devices on battery-backed outlets
How to Fix It
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Immediately disconnect the least critical devices from the UPS.
Unplug devices one at a time, starting with non-essential equipment such as monitors, speakers, or device chargers. After each disconnection, check whether the overload alarm clears.
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Calculate the total watt draw of remaining connected devices.
Find the wattage on the label of each device's power adapter or the device itself. Add them up — the total must be below the UPS's rated wattage (not the VA rating). If you only have the VA rating, multiply by 0.6 to get an approximate watt rating.
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Move non-critical devices to a regular power strip.
Monitors, external drives, and chargers can usually be moved to a surge-protected power strip rather than the UPS itself. Only equipment that must continue running during a power cut (computer, server, network equipment) needs UPS battery power.
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If all devices are essential and the UPS is consistently overloaded, you need a larger UPS.
As a guide, choose a UPS with a watt rating at least 25% higher than your total device load. This gives headroom for device startup surges and protects the UPS from running at its limit.
Frequently Asked Questions
Why does the Advice UPS overload alarm beep when I turn on my computer?
Computers draw significantly more current at startup than during normal operation. If the UPS is already near its capacity limit, the startup surge of the computer tips it into overload temporarily. This startup overload often clears within a few seconds. If it persists beyond startup, the total load is genuinely too high.
Can a UPS overload damage my connected devices?
The UPS protects itself by shutting down before damage occurs. If the UPS shuts down abruptly, devices that were running (particularly computers) may experience an unclean shutdown. Reduce the load before this happens — do not repeatedly dismiss overload alarms.