Troubleshooting
29
Fault and LEDs D&E are
Illuminated
Charger malfunction
If the charger is overvoltage, the UPS will shutdown. If the
charger is undervoltage and the batteries are nearly depleted,
this alarm will give a temporary warning before the UPS shuts
down. UPS requires service. Contact your local dealer, Liebert
representative or Liebert Worldwide Support Group.
Battery LED is flashing.
Battery source is not
available; continuous horn.
Check battery connections, completely power down and restart
UPS.
NOTE: If the battery circuit
opens while the UPS is running,
it will be detected when the next
battery test is performed.
Table 5 Alarm conditions
Condition Alarm
Battery Mode (mains failure) One short beep every 10 seconds: more than 2 minutes of run time remaining
Low Battery Two short beeps every 5 seconds: less than 2 minutes of run time remaining
Output Overload (Bypass) One short beep every half second
Overtemperature (Bypass) A one-second beep every 4 seconds
DC Bus Overvoltage (Bypass) A one-second beep every 4 seconds
DC-DC failure during battery
mode
A one-second beep every 4 seconds
PFC Failure (Bypass) A one-second beep every 4 seconds
Inverter Failure A one-second beep every 4 seconds
Battery Test Failure A two-second beep every 1 minute
Fan Locked A one-second beep every 4 seconds
REPO Active A 0.25-second beep every 0.25 seconds
UPS OFF; Autorestart disabled
from previous REPO shutdown
A one-second beep every 4 seconds
Charger Malfunction A one-second beep every 4 seconds
Table 4 Troubleshooting guide (cont’d)
Problem
Cause Solution
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