Liebert UPSTATION GXT 2U - Manual (Page 27)

23
TROUBLESHOOTING
The information below indicates various symptoms a user may encounter
in the event the UPStation GXT 2U™ develops a problem. Use this infor-
mation 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:
LED status Diagnosis/Audible alarm
All LEDs On bypass due to output overload; beep ever 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
C&E LEDs
UPS shutdown due to command from communication port
(SNMP); no beep
Battery
LED Flashing
Internal Battery source not available (continuous horn). Check
battery connection, completely power down and reboot UPS.
AC LED
Flashing
Line to neutral reversal in the AC input power supply or a loss of
proper grounding; continuous horn and UPS will not start.
Bypass LED
Flashing
Utility power voltage or frequency is out of tolerance; bypass is
unavailable.
This example shows UPS on bypass
due to output overload.
Fault
E
D
C
B
A
A B C D E Fault
AC INPUT BATTERY UPS ON BYPASS
BATTERY
UPS ON
BYPASS
AC
INPUT
LOAD/BATTERY
LEVEL INDICATORS