Dell UPS 1920T - Manual (Page 62)

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Troubleshooting
Table 16. Typical Alarms and Conditions (continued)
Alarm or Condition Action Possible Cause
Input AC Over Voltage
(Alarm 6)
Intermittent Alarm
Utility voltage exceeds the
maximum operating range. The UPS transfers to Battery mode if
supporting load.
Input AC Under Voltage
(Alarm 7)
Intermittent Alarm
Utility voltage is below the
minimum operating range. The UPS transfers to Battery mode if
supporting load.
Input Under/Over Frequency
(Alarm 8)
Intermittent Alarm
The utility frequency is out of
usable frequency range. The UPS transfers to Battery mode if
supporting load.
Site Wiring Problem
(Alarm 194)
Continuous Alarm
An alarm triggers when the
difference between ground and
neutral voltage is >15V. Have a qualified electrician correct the wiring
problem. If the UPS is not wired with a neutral
wire, Site Fault should be disabled in the
Settings menu (see page 36).
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.