User Manual

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Troubleshooting
Table 17. Alarms, Notices, and Events
Alarms, Notices, and Events ActionPossible Cause
DC Link Imbalance
(Alarm 1234)
Beeping Alarm
The internal ± DC bus (DC
rail) voltages generated in the
UPS are imbalanced.
The UPS transfers to Battery mode if
supporting the load.
Rectifier Fault
(Alarm 30)
Continuous Alarm
The UPS has detected a fault in
the rectifier circuit while
attempting recovery from
Bypass mode or Converter
mode.
Contact your service representative.
Inverter Fault
(Alarm 31)
Continuous Alarm
The UPS has detected a fault in
the inverter circuit while
attempting a recovery from
Bypass mode or Converter
mode.
Contact your service representative.
Heatsink Over Temperature
(Alarm 73)
Beeping Alarm
The UPS has detected that one
of its heat sinks has exceeded
the maximum defined
operating temperature. Possible
fan failure.
The UPS transfers to Bypass mode if available.
If the bypass is not available or the UPS is in
power on or standby mode, the UPS transfers
to fault mode.
Ensure that the fans are spinning and that the
air intake vents on the UPS are not blocked.
Once the maximum temperature is reached,
the UPS shuts down.
Fatal EEPROM Fault
(Alarm 53)
Continuous Alarm
There is EEPROM data
corruption due to a failed
device or incorrect flash
upgrade.
Contact your service representative.
Output Short Circuit
(Alarm 58)
Beeping Alarm
The UPS has detected an
abnormally low impedance
placed on its output and
considers it a short circuit.
If the UPS is in Normal mode, the UPS
transfers to Bypass mode if available,
otherwise, the UPS shuts down after three to
five line cycles.
If the UPS is in Battery mode, the UPS shuts
down after three to five line cycles.
Fan Failure
(Alarm 193)
Continuous Alarm
The UPS has detected that one
or more fans are not
functioning properly.
This is an alarm only. Contact your service
representative immediately and remove the
load.
In High Efficiency Mode
(Event 227)
No Alarm
The UPS is operating in High
Efficiency Mode.
None.