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Liebert GXT4 User Manual: Troubleshooting; Ups Symptoms; Indicator And Lcd

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7.0
T
ROUBLESHOOTING
This section indicates various UPS symptoms a user may encounter and provides a troubleshooting
guide in the event the UPS develops a problem. Use the following information to determine whether
external factors caused the problem and how to remedy the situation.
7.1
UPS Symptoms
The following symptoms indicate the Liebert GXT4 is malfunctioning:
• The relative indicators illuminate, indicating the UPS has detected a problem.
• An alarm buzzer sounds, alerting the user that the UPS requires attention.
7.1.1
Indicator and LCD
In addition to the fault indicator being illuminated, the LCD will display the fault. The displayed
fault on the LCD is described in Table 10
Table 10
Description of the displayed fault
Displayed Fault
UPS self test failed
UPS shutdown
command received
UPS overload
Inverter Out of Order
Battery Weak/Bad
Output Short Circuit
DC Bus Overvoltage
UPS Overtemperature
Charger Out of Order
Fan Out of Order
DC Bus Discharge Fail A DC-DC failure occurs.
NOTE
If the UPS encounters a fault and no correction attempt is performed within 2 minutes, the
LCD backlight will flash (on 1 second and off 1 second) as an alert.
Press any button to exit the alert mode. If no correction attempt is performed on the UPS, the
LCD backlight will flash again until the UPS fault is corrected.
®
Liebert
GXT4
Cause
The battery is bad or weak.
The UPS shuts down through
communication.
The UPS is overloaded.
The inverter is faulty.
The battery is bad or weak.
The output connection is short-circuited.
The DC bus is faulty.
Over-temperature occurs to the UPS and the
UPS will transfer to Bypass mode.
The charger is faulty.
At least one fan is faulty.
Corrective Steps
Contact customer service.
Contact customer service.
Reduce the load and contact customer
service.
Contact customer service.
Replace the battery.
Shut down the equipment and contact
customer service.
Contact customer service.
Reduce the load and contact customer
service.
Contact customer service.
Contact customer service.
Contact customer service.
40

Troubleshooting

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Troubleshooting

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