Dell H955N User Manual page 68

Table 15. Typical Alarms and Conditions (continued)
Alarm or Condition
Output Overload Level 2
(Alarm 159)
Continuous Alarm
Output Overload Level 3
(Alarm 162)
Continuous Alarm
Battery DC Over Voltage
(Alarm 68)
Continuous Alarm
Charger Failure
(Alarm 34)
Continuous Alarm
Inverter AC Under Voltage
(Alarm 1)
Continuous Alarm
Rectifier Input Over Current
(Alarm 26)
Continuous Alarm
Inverter Output Over
Current
(Alarm 27)
Continuous Alarm
DC Link Over Voltage
(Alarm 28)
Continuous Alarm
Rectifier Fault
(Alarm 30)
Continuous Alarm
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Troubleshooting
Possible Cause
The load level is >101% and
<110% of the UPS rating.
The load is >110% of the UPS
rating.
Battery voltage levels have
exceeded the maximum
allowable limits.
A battery charger fault has been
detected.
The UPS has detected
abnormally low inverter voltage
levels.
The UPS has detected that
rectifier input current limits
have been exceeded.
The UPS has detected that the
inverter output current limits
have been exceeded.
The link or rail voltage has
exceeded its upper threshold
limit.
The UPS has detected a fault in
the rectifier circuit while
attempting recovery from
Bypass mode or Converter
mode.
Action
Remove some of the equipment from the
UPS. The UPS continues to operate, but
transfers to Fault mode in two minutes.
The alarm clears when the load drops below
5% of the set point.
Remove some of the equipment from the
UPS. The UPS continues to operate, but
transfers to Fault mode in 300 ms to one
second.
The alarm clears when the load drops below
5% of the set point.
The UPS turns off the charger until the next
power recycle. Contact your service
representative.
The UPS turns off the charger until the next
power recycle. Contact your service
representative.
The UPS transfers to Bypass mode if
supporting the load.
The UPS transfers to Battery mode if
supporting the load.
The UPS transfers to Bypass mode if
supporting the load.
The UPS transfers to Battery mode if
supporting the load.
Contact your service representative.