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Troubleshooting
Table 15. Typical Alarms and Conditions (continued)
Alarm or Condition ActionPossible Cause
Output Overload
(Alarm 25)
Continuous Alarm
The load level is at or has
exceeded the configurable
threshold limit for a Level 1
Overload condition.
The UPS can support the load indefinitely at
this load level.
The alarm clears when the load drops below
5% of the set point.
Output Overload Level 2
(Alarm 159)
Continuous Alarm
The load level is >101% and
<110% of the UPS rating.
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.
Output Overload Level 3
(Alarm 162)
Continuous Alarm
The load is >110% of the UPS
rating.
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.
Battery DC Over Voltage
(Alarm 68)
Continuous Alarm
Battery voltage levels have
exceeded the maximum
allowable limits.
The UPS turns off the charger until the next
power recycle. Contact your service
representative.
Charger Failure
(Alarm 34)
Continuous Alarm
A battery charger fault has been
detected.
The UPS turns off the charger until the next
power recycle. Contact your service
representative.
Inverter AC Over Voltage
(Alarm 0)
Continuous Alarm
The UPS has detected
abnormally high inverter
voltage levels.
The UPS transfers to Bypass mode if
supporting the load.
Inverter AC Under Voltage
(Alarm 1)
Continuous Alarm
The UPS has detected
abnormally low inverter voltage
levels.
The UPS transfers to Bypass mode if
supporting the load.
Rectifier Input Over Current
(Alarm 26)
Continuous Alarm
The UPS has detected that
rectifier input current limits
have been exceeded.
The UPS transfers to Bypass mode if
supporting the load.
Inverter Output Over
Current
(Alarm 27)
Continuous Alarm
The UPS has detected that the
inverter output current limits
have been exceeded.
The UPS transfers to Bypass mode if
supporting the load.