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6.2 Troubleshooting the Liebert® GXT5
This section indicates various UPS symptoms you 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.
6.2.1 Symptoms that Require Troubleshooting
The following symptoms indicate the UPS is malfunctioning:
• The alarm indicator illuminates, indicating the UPS has detected a problem.
• An alarm buzzer sounds, alerting the user that the UPS requires attention.
6.2.2 Audible Alarm (Buzzer)
An audible alarm accompanies various events during UPS operations. Table 6.3 below , describes the sounds and their
meaning.
SOUND INDICATES
Continuous beep Generated when a UPS fault appears, such as a fuse or hardware failure.
One beep every 0.5 seconds Generated when a UPS critical alarm appears, such as on inverter overload.
One beep every 1 second. Generated when a UPS critical alarm appears, such as on battery low voltage
One beep every 3.3 seconds Generated when a UPS general alarm appears
Table 6.3 Audible-alarm Descriptions
NOTE: When an alarm is indicated, an alarm message is logged. See Liebert® GTX5 User Manual that
describes the alarm messages. When a fault is indicated, front-panel display list the fault, which are
described in Table 6.4 below .
6.2.3 Faults
When the fault indicator is illuminated, the LCD displays the fault. The faults are described in Table 6.4 below .
FAULT CAUSE CORRECTIVE STEPS
Battery test fail The battery is bad or weak. Contact technical support.
Rectifier fault A rectifier failure occurred. Contact technical support.
Inverter overload,
Bypass overcurrent
The UPS is overloaded, Bypass is over current. Reduce the load and contact technical support.
Inverter fault The inverter is faulty. Contact technical support.
Battery aged The battery is bad or weak. Replace the battery.
Output short The output connection is short-circuited. Shut-down the equipment and contact technical support.
DC bus fail The DC bus is faulty. Contact technical support.
System overtemp
Over-temperature condition in the UPS. The
UPS will transfer to bypass mode.
Reduce the load and contact technical support.
Table 6.4 Description of Displayed Faults
6 Troubleshooting
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