Table 14. Typical alarms and conditions (continued)
Alarm or condition Possible cause Action
Heatsink Over Temperature
(Alarm 73)
Fast 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 bypass is not available or
the UPS is in power on or Standby
mode, the UPS transfers to Fault
mode and shuts down.
Make sure that the fans are spinning
and that the air intake vents on the
UPS are not blocked. The alarm
clears when the heat sink
temperature drops 5°C (9°F) below
the warning level.
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.
DC Link Imbalance
(Alarm 1234)
Fast Beeping Alarm
The internal ±DC bus (DC rail)
voltages generated in the UPS are
imbalanced.
The UPS transfers to Bypass mode if
available and supporting the load, or
Fault mode if not.
Fan Failure
(Alarm 193)
Continuous Alarm
The UPS has detected that one or
more fans are not functioning
correctly.
This is an alarm only. Contact your
service representative immediately
and remove the load.
Bypass AC Over Voltage
(Notice 3)
Slow Intermittent Alarm
The measured voltage on Bypass has
exceeded the upper voltage limit
specification for bypass operation.
Check the bypass utility. Check that
the Bypass settings are configured
correctly for your location. See
Table 8 on page 32.
Bypass AC Under Voltage
(Notice 4)
Slow Intermittent Alarm
The measured voltage on Bypass is
less than the lower voltage limit
specification for bypass operation.
Check the bypass utility. Check that
the Bypass settings are configured
correctly for your location. See
Table 8 on page 32.
Bypass Under/Over Frequency
(Notice 5)
Slow Intermittent Alarm
The measured frequency on Bypass
is outside of either the upper or lower
frequency limit specification for
bypass operation.
Check the bypass utility. Check that
the Bypass settings are configured
correctly for your location. See
Table 8 on page 32.
Silencing the alarm
Press any button on the control panel to silence the alarm. Check the alarm
condition and perform the applicable action to resolve the condition. If any new
alarm becomes active, the audible alarm resumes, overriding the previously
silenced alarm.
Chapter 6. Troubleshooting 61
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