Operation and Display Panel
Liebert
®
GXT4
™
30
3.4.6 Fault List
All UPS fault messages are described in Table 7.
If a fault occurs, the UPS automatically switches to Bypass Mode. The original operating mode will be
maintained only in the case of a battery disconnection fault. The fault message alternates with UPS
Mode once a second, the red fault indicator on the operation and display panel lights up and the alarm
sounds continuously.
If a fault occurs, proceed as follows:
1. Enter the ALARM CONTROL screen (see Figure 34), and select AUDIBLE ALARM ON or
AUDIBLE ALARM OFF to switch the alarm On or Off.
2. Enter the EVENT LOG screen (see Figure 36), and select VIEW LOG to view the entire Event log.
Table 7 Fault list
Fault Description
UPS Self-Test Failed The battery is bad or weak or not connected.
UPS Overload The UPS is overloaded.
Inverter Out Of Order The inverter has failed.
Battery Weak/Bad The battery is bad or weak.
Output Short Circuit The output connection is short-circuited.
DC Bus Overvoltage The DC bus is faulty.
UPS Overtemperature Overtemperature occurs to the UPS and the UPS will transfer to Bypass mode.
Charger Out Of Order The charger has failed.
Fan Out Of Order At least one fan is failed.
DC Bus Discharge Fail DC-DC failure occurs.
Rectifier Out Of Order Rectifier failure occurs.
NOTE
There will be a short delay before the EVENT LOG screen displays the historical fault log to
allow the log to load.
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