Philips SPB4230WA/17 - Manual (Page 18)

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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.