EATON Powerware
®
9355 UPS (20/30 kVA) Installation and Operation Manual S 164201626 Rev B www.powerware.com
87
Chapter 13 Troubleshooting
The Powerware 9355 is designed for durable, automatic operation and also alerts you
whenever potential operating problems may occur. Usually the alarms shown by the
control panel do not mean that the output power is affected. Instead, they are
preventive alarms intended to alert the user. Use the following troubleshooting chart
to determine the UPS alarm condition.
Typical Alarms and Conditions
The following table describes typical alarms and conditions; check the Event Log
through the control panel for a list of active alarms. If an alarm appears with a service
code, please contact the Help Desk (see page 89).
Alarm or Condition Possible Cause Action
On Battery
LED is on.
1 beep every second.
A utility failure has occurred and the UPS is in
Battery mode.
The UPS is powering the equipment with battery power. Prepare
your equipment for shutdown.
Battery Low
LED is on.
Continuous beep for
10 seconds.
The battery is running low. Five minutes or less of battery power remains (depending on load
configuration and battery charge). Save your work and turn off
your equipment.
When utility power is restored, the UPS restarts automatically,
provides power to the load, and charges the battery.
Battery Breaker
LED is on.
1 beep every second.
The UPS does not recognize the internal
batteries.
Verify the battery circuit breaker is in the ON position. If the
condition persists, contact your service representative.
Overload
LED is on.
1 beep every second.
The power requirements exceed the UPS
capacity (greater than 100% of nominal; see
page 84 for specific output overload ranges).
Remove some of the equipment from the UPS. The UPS continues
to operate, but may switch to Bypass mode if the load increases.
The alarm resets when the condition becomes inactive.
Overtemperature
LED is on.
1 beep every second.
The UPS internal temperature is too high or the
fan has failed.
Turn the maintenance bypass switch to the SERVICE position.
Otherwise, shut down the UPS.
Clear vents and remove any heat sources. Allow the UPS to cool.
Ensure the airflow around the UPS is not restricted.
If the alarm disappears, turn the maintenance bypass switch back
to the UPS position.
If the condition persists, contact your service representative.
Battery test failed The batteries need service. Contact your service representative.
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