Chapter 10 Troubleshooting
The Powerware 9155 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 58).
Alarm or Condition | Possible Cause | Action |
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On Battery | A utility failure has occurred and the | ||||
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| UPS is in Battery mode. |
LED is on.
1 beep every second.
The UPS is powering the equipment with battery power. Prepare your equipment for shutdown.
Battery Low | The battery is running low. | Five minutes or less of battery power remains |
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| (depending on load configuration and battery |
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| charge). Save your work and turn off your |
LED is on. |
| equipment. |
| When utility power is restored, the UPS restarts | |
Continuous beep for |
| |
| automatically, provides power to the load, and | |
10 seconds. |
| charges the battery. |
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Battery Breaker | The UPS does not recognize the | Verify the battery circuit breaker is in the ON |
| internal batteries. | position. If the condition persists, contact your |
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| service representative. |
LED is on. |
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1 beep every second. |
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Overload | Power requirements exceed the UPS |
| capacity (greater than 100% of |
| nominal). |
LED is on. |
|
1 beep every second. |
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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.
EATON Powerware® 9155 Parallel UPS | 55 |