Table 4
Troubleshooting guide (cont'd)
Problem
Fault and LEDs D&E are
Illuminated
Battery LED is flashing.
Table 5
Alarm conditions
Condition
Battery Mode (mains failure)
Low Battery
Output Overload (Bypass)
Overtemperature (Bypass)
DC Bus Overvoltage (Bypass)
DC-DC failure during battery
mode
PFC Failure (Bypass)
Inverter Failure
Battery Test Failure
Fan Locked
REPO Active
UPS OFF; Autorestart disabled
from previous REPO shutdown
Charger Malfunction
Cause
Charger malfunction
Battery source is not
available; continuous horn.
Alarm
One short beep every 10 seconds: more than 2 minutes of run time remaining
Two short beeps every 5 seconds: less than 2 minutes of run time remaining
One short beep every half second
A one-second beep every 4 seconds
A one-second beep every 4 seconds
A one-second beep every 4 seconds
A one-second beep every 4 seconds
A one-second beep every 4 seconds
A two-second beep every 1 minute
A one-second beep every 4 seconds
A 0.25-second beep every 0.25 seconds
A one-second beep every 4 seconds
A one-second beep every 4 seconds
Solution
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.
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.
29
Troubleshooting