Emerson GXT2U Manuel D’Utilisation

The information below indicates various symptoms a user may encounter in 

the event the Liebert GXT2U develops a problem. Use this information 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:

Under fault conditions, the Fault indicators will be illuminated indefinitely 

while battery charger is operational, or for a maximum of 5 minutes while 

battery charger is not operational. 
If a problem persists, consult your local dealer, Liebert representative or 

contact the Liebert Worldwide Support Group. Please have the UPS model 

number and serial number available at the time of your inquiry.

On bypass due to output overload; beep every half-second

On bypass due to overtemperature condition; beep every 4 sec.

On bypass due to DC bus overvoltage; beep every 4 sec.

On bypass due to control power supply failure; beep every 4 sec.

On bypass due to PFC failure; beep every 4 sec.

On bypass due to inverter failure; beep every 4 sec.

UPS failed battery test; long beep every minute

UPS shutdown due to command from communication port (SNMP); no beep

Internal Battery source not available (continuous horn). Check battery

connection, completely power down and reboot UPS.

Line-to-neutral reversal in the AC input power supply or a loss of proper 

grounding; continuous horn and UPS will not start.

Utility power voltage or frequency is out of tolerance; bypass is unavailable.