User's Guide Power Supply 9150
55
Powerware
®
9150 User’s Guide www.powerware.com
CHAPTER 6
TROUBLESHOOTING
The Powerware 9150 is designed for durable, automatic operationand
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.
IndicatororAlarm Possible Cause Action
ON BATTERY
LED is on. A utility failure has occurred and
the UPS is in Battery Mode. The alarm
sounds for five seconds when battery
operation is initialized and then twice every
minute.
None. The alarm resets when the condition
becomes inactive.
LED is blinking. The battery voltage is low
and has less than five minutes of backup
time left before UPS shutdown.
Prepare your equipment for shutdown. When
utility is restored, the UPS restarts automatically,
provides power to the load, and charges the
battery.
BYPASSED
2 short beeps
The UPS is in Bypass Mode. None. The alarm resets when the condition
becomes inactive. Contact your service
representative if the condition persists.
OVERLOAD LED is on. Power requirements exceed the
UPS capacity (greater than 100% of nominal).
Reduce the load. Your UPS continues to operate,
but may switch to Bypass Mode if the load
increases (112.5 - 150% of nominal for 30
seconds). The alarm resets when the condition
becomes inactive.
LED is blinking. Overload condition caused
the UPS to shut down (greater than 150% of
nominal for 0.3 seconds).
Reduce the load and restart the UPS. You may
need to obtain a larger capacity UPS.
OVERTEMP
On or Blinking
One of the main UPS components is too hot
or the fan has failed.
Turn the Maintenance Bypass switch to the
g
7 short and 3 long UPS beeps indicate the
temperature inside the UPS is more than 50
degrees.
y
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SERVICE position. Clear vents. Remove any heat
sources. Allow the UPS to cool. If the alarm
disappears, turn the Maintenance Bypass switch
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