Troubleshooting
41 Liebert
®
GXT4
™
7.1.2 Audible Alarm
An audible alarm will sound in conjunction with the visual indicators to indicate a change in UPS
operating status. The audible alarm will sound as described in Table 11.
7.2 Troubleshooting
In the event of an issue with the UPS, refer to Table 12 to determine the cause and solution. If the
fault persists, contact Emerson
®
Channel Support.
When reporting a UPS issue to Emerson, include the UPS model and serial number. These are
located in several places for your ease of location: on the top panel (rack mount orientation); the left
side (tower orientation); the rear panel; on the front of the unit behind the front plastic bezel; and on
the LCD select MAIN MENU > ABOUT.
Table 11 Audible alarm description
Condition Alarm
Battery discharge Half-second beep every 10 seconds
Low battery Two half-second beeps every 5 seconds
UPS fault, load on bypass 1-second beep every 4 seconds
UPS fault, no power to load Continuous
Overload Half-second beep every half second
Battery replacement 2-second beep every 2 minutes
Battery loss Continuous
Wiring problem (loss of proper grounding for UPS) Continuous
Bypass reminder 1-second beep every 60 seconds
Table 12 Troubleshooting table
Problem Cause Solution
UPS fails to start
UPS is short-circuited or
overloaded
Ensure UPS is Off. Disconnect all loads and ensure nothing is lodged in
output receptacles. Ensure loads are not defective or shorted internally.
Batteries are not charged
enough or not connected
Check to ensure the internal battery is connected. If it is not, make the
connection and try to start the unit. If the battery is connected, leave the
UPS connected to input power for 24 hours to recharge batteries, then try
to start the unit.
Battery indicator
is illuminated
UPS is not plugged in
UPS is operating from battery mode. Ensure UPS is securely plugged
into the wall receptacle.
UPS input protection fuse has
blown/opened
UPS is operating from battery mode. Save data and close applications.
Replace UPS input fuse, then restart UPS.
Mains power is out of tolerance
UPS is operating from battery mode. Save data and close applications.
Ensure mains supply voltage is within acceptable limits for UPS.
UPS has
reduced battery
backup time
Batteries are not fully charged
Keep UPS plugged in continuously at least 24 hours to recharge
batteries.
UPS is overloaded Check load level indicator and reduce the load on the UPS.
Batteries may not be able to
hold a full charge due to age
Replace batteries. Contact your local dealer, Emerson representative or
Emerson Channel Support for replacement battery kit.
Battery indicator
is flashing.
Battery source is not available;
continuous horn.
Check battery connections, completely power down and restart UPS.
NOTE: If the battery circuit opens while the UPS is running, it will be
detected when the next battery test is performed.
Bypass indicator
is flashing.
Because the voltage or
frequency is outside acceptable
limits, the bypass is disabled.
The AC input powers the PFC input and serves as the bypass source. If
the AC is present but the voltage or frequency exceeds the acceptable
range for safe operation with a load, the bypass will be disabled and this
indicator will flash, indicating that the bypass is unavailable.
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