Troubleshooting - Liebert 2700VA User Manual

The information below indicates various symptoms a user may encounter
in the event the UPStation GXT 2U develops a problem. Use this informa-
tion to determine whether external factors caused the problem and how to
remedy the situation.
1. The Fault indicator will illuminate, indicating the UPS detected a
problem.
2. An alarm will sound, alerting that the UPS requires attention.
3. One or more additional load/battery level LED indicators will be illumi-
nated to provide a diagnostic aid to the operator, as described below:
Fault
E
D
C
B
A
LED status Diagnosis/Audible alarm
All LEDs On bypass due to output overload; beep every half-second
A LED On bypass due to overtemperature condition; beep every 4 sec.
B LED On bypass due to DC bus overvoltage; beep every 4 sec.
C LED On bypass due to control power supply failure; beep every 4 sec.
D LED On bypass due to PFC failure; beep every 4 sec.
E LED On bypass due to inverter failure; beep every 4 sec.
A&C LEDs UPS failed battery test; long beep every minute
UPS shutdown due to command from communication port
C&E LEDs
(SNMP); no beep
Battery LED Internal Battery source not available (continuous horn). Check
Flashing battery connection, completely power down and reboot UPS.
AC LED Line-to-neutral reversal in the AC input power supply or a loss of
Flashing proper grounding; continuous horn and UPS will not start.
Bypass LED Utility power voltage or frequency is out of tolerance; bypass is
Flashing unavailable.

TROUBLESHOOTING

This example shows the UPS
on bypass due to output overload.
BYPASS
UPS ON
BATTERY
AC
INPUT
A B
AC INPUT BATTERY UPS ON BYPASS
LOAD/BATTERY
LEVEL INDICATORS
25
C D E Fault