4.6 Warning List
All UPS warning messages are described the following table.
WARNING DESCRIPTION
Mains Power Not Available
The mains power is not available, or it cannot satisfy the input requirements for the UPS to operate from mains
power
UPS Batteries Low And
Exhausted Soon
The battery capacity is low and will be exhausted soon
UPS Has Switched To Battery
Mode
The mains power is abnormal or the PFC side is faulty, the UPS transfers back to Battery mode
Load On Bypass
The UPS transfers to Bypass mode, at this point, the input mains power supplies power to the load directly, and the
load is not protected
Input Power Wiring Error L-N line reverse or PE not connected.
Bypass Power Not Available The bypass power is not available, or it cannot satisfy the requirements for the UPS transfers to bypass
UPS Maintenance Bypass Output The UPS transfers to maintenance bypass.
AC input not qualified, cannot
start UPS
The utility power is not qualified, the inverter cannot be powered up
Output disabled REPO terminal connect error
Table 4.4 Warning list
4.7 Fault List
All UPS fault messages are described the following table.
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.
Table 4.5 Fault list
Vertiv | Liebert GXT4 Installer/User Guide | 38
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