PCB failure.You will have to call for service to replace the PCB.
What should I do if the alarm sounds continuously?
The alarm is alerting you that an overload situation is occurring. Immediately discon- nect a device from the UPS. If the alarm continues, disconnect another device, and so on until the alarm stops. Check the to- tal power requirements of your connected equipment and make sure it does not exceed the capacity of the UPS (1000V) before reconnecting.
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