Emerson GXT2U user manual Troubleshooting, Diagnosis/Audible alarm, Status

TROUBLESHOOTING

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:

Fault

E

BYPASS

D

C UPS ON

B BATTERY

A

AC

INPUT

This example shows the UPS

on bypass due to output overload.

A B C D E Fault

AC INPUT BATTERY UPS ON BYPASS

LOAD/BATTERY

LEVEL INDICATORS

LED	Diagnosis/Audible alarm
Status
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
C&E LEDs	UPS shutdown due to command from communication port (SNMP); no beep
Battery LED	Internal Battery source not available (continuous horn). Check battery
Flashing	connection, completely power down and reboot UPS.
AC LED	Line-to-neutral reversal in the AC input power supply or a loss of proper
Flashing	grounding; continuous horn and UPS will not start.
Bypass LED	Utility power voltage or frequency is out of tolerance; bypass is unavailable.
Flashing

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.

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