What's causing the Schneider UPS power supply to keep sounding?

The continuous alarming of the Schneider UPS power supply usually indicates that the device has detected an abnormal situation and requires timely inspection one by one. According to common causes, it can be mainly summarized as follows:
Main reasons and countermeasures
Battery issue (the most common reason)
Low battery or aging: When the UPS switches to battery power supply mode, or when the battery has been used for more than 3-5 years and its capacity has severely decreased, a continuous alarm will be triggered. Please check whether the panel displays prompts such as "Battery Low" or "Replace Battery".
Battery connection abnormality: Check whether the Anderson plug or the battery terminal connecting wire is loose or oxidized, and re-plug to ensure good contact.
Overload or overload operation
If the total power of connected devices exceeds the rated capacity of the Schneider UPS, overload protection will be triggered and an alarm will be continuously sounding. Please disconnect non-essential devices to ensure that the total load does not exceed 80% of the UPS rated capacity. If the "Overload" indicator light is on, immediate load reduction is required.
Mains input abnormality
If the mains voltage is too high, too low, or the frequency is unstable (such as when using a generator for power supply), the UPS will alarm due to abnormal input power. Please confirm that the power supply from the outlet is normal and the voltage is within the allowable range of the device.
Schneider UPS internal fault
If all indicator lights are constantly on, the alarm sound is continuous, or accompanied by the fault light being on, it may indicate a fault in internal components such as the inverter and control board. At this time, you should immediately shut down the device, stop using it, and contact professional after-sales service for repair. Do not disassemble the device yourself.
Other possible reasons
Fan failure: The internal cooling fan may be damaged or entangled with foreign objects, which may cause the temperature to rise too high and trigger an alarm. Check whether the fan is rotating normally.
False alarm setting: For some models, the alarm threshold can be adjusted through monitoring software or the settings menu to check whether false alarms are caused by overly sensitive settings.
Suggested processing steps
First, observe the status of the indicator lights on the UPS panel and make a preliminary judgment on the type of problem based on the alarm sound pattern (continuous beeping, intermittent beeping).
Check and disconnect some loads to confirm whether it is overload.
Check the battery status, measure the battery voltage, and inspect the connecting wires.
Try to turn off the UPS power supply, unplug all cables, wait for 5-10 minutes, and then restart it to see if it can be reset.
If the above steps are ineffective, or if the panel displays a fault code, please directly contact Schneider UPS's official after-sales service personnel for inspection and repair.
Important Note: Continuous alarms are warning signals emitted by the device. Ignoring them may lead to power loss of the load device or battery damage. Please do not simply mute the alarm sound through the mute function, but rather investigate the underlying cause