Table of Contents
This section indicates various UPS symptoms a user may encounter and troubleshooting steps 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 has malfunctions.
1. The fault indicator will be illuminated, and the LCD display panel will display the fault.
2. An alarm buzzer will sound, indicating that the UPS requires attention.
7.1.1 Indicator And LCD Display Panel
In addition to the fault indicator being illuminated, the LCD display panel will display the fault. The displayed fault on
the LCD display panel is described in Table 7-1.
Displayed fault
UPS self test failed
UPS shutdown command received
UPS overload
Inverter Out of Order
Battery Weak/Bad
Output Short-circuit
DC Bus Over-voltage
UPS Over-temperature
Charger Out of Order
Fan Out of Order
DC Bus Discharge Fail
Note
If the UPS encounters a fault, and you do not perform any operation on it within two minutes, the LCD backlight will flash (on 1s
and off 1s) to remind you of the fault. You can press any button to exit the flash mode. If you still do not perform corresponding
operation on the UPS, the LCD backlight will flash again until you handle the UPS fault.
7.1.2 Audible Alarm
An audible alarm will be used in conjunction with the visual indicator to indicate to the user a change in UPS
operating status. The audible alarm will enunciate as given in Table 7-2.
No.
1
Battery discharge
2
Low battery
3
UPS fault, load on bypass
4
UPS fault, no power to load
5
Overload
6
Battery
7
Battery loss
Wiring problem (including line-to-neutral reversal or a
8
loss of proper grounding for UPS)
Chapter 7 Troubleshooting
Table 7-1 Description of the displayed fault
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
DCDC failure occurs
Table 7-2 Audible alarm description
Condition
Liebert GXT4 UPS 700VA ~ 3000VA (230V) User Manual
Cause
Call customer service
Call customer service
Reduce the load and call customer service
Call customer service
Replace the battery
Shut down the equipment and call customer
service
Call customer service
Reduce the load and call customer service
Call customer service
Call customer service
Call customer service
Half-second beep every 10 seconds
Two half-second beeps every 5 seconds
1-second beep every 4 seconds
Continuous
Half-second beep every half second
Replacement 2-second beep every 2 minutes
Continuous
Continuous
Chapter 7 Troubleshooting
Corrective Steps
Alarm
33
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