PROBLEM CAUSE SOLUTION
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.
Fault and Bypass indicators and all
LED segments of battery level
indicator are illuminated
UPS is overloaded or load is faulty
Check load level indicator and remove non-essential loads.
Recalculate the load and reduce number of loads connected to UPS.
Check load for faults.
Fault and Bypass indicators and
diagnostic A indicator are illuminated
UPS has been shut down due to
temperature condition; load is on
bypass power
Ensure UPS is not overloaded, ventilation holes are not blocked and
room ambient temperature is not excessive. Wait 30 minutes to
allow UPS to cool, then restart UPS. If UPS cannot restart, contact
your local dealer, Emerson representative or Emerson Channel
Support.
Fault and Bypass indicators and
diagnostic B indicator are illuminated
UPS internal DC bus overvoltage
UPS requires service. Contact your local dealer, Emerson
representative or Emerson Channel Support.
Fault and Bypass indicators and
diagnostic C indicator are illuminated
UPS DC/DC fault
UPS requires service. Contact your local dealer, Emerson
representative or Emerson Channel Support.
Fault indicator and diagnostic D
indicator are illuminated
UPS PFC (Power Factor Correction
Circuit) fault
UPS requires service. Contact your local dealer, Emerson
representative or Emerson Channel Support.
Fault and Bypass indicators and
diagnostic E indicator are illuminated
UPS inverter fault
UPS requires service. Contact your local dealer, Emerson
representative or Emerson Channel Support.
Fault indicator and diagnostic A and C
indicators are illuminated
UPS failed the battery test
Replace batteries. Contact your local dealer, Emerson
representative or Emerson Channel Support.
Fault and Bypass indicators and
diagnostic C and E indicators are
illuminated
UPS has been shut down by a
command from the communications
port(s)
Your UPS has received a signal or command from the attached
computer. If this was inadvertent, ensure the communication cable
used is correct for your system. For assistance, contact your local
dealer, Emerson representative or Emerson Channel Support.
Fault indicator and diagnostic A and B
indicators are illuminated
UPS failure (includes dual-fan failure,
single-fan failure under certain
conditions and battery charger failure)
and continuous alarm
Ensure fan is not blocked up. If the fault is not removed, contact
your local dealer, Emerson representative or Emerson Channel
Support.
AC input indicator is flashing.
UPS detected a line-to-neutral reversal
or a loss of proper grounding for UPS;
continuous horn and UPS cannot start
up in standby status. This is active
only when power is first applied to the
input. Once the UPS is running, the AC
input indicator will flash, unless the
input wiring is correctly changed.
Contact a qualified electrician to verify site wiring.
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.
When reporting a UPS issue to Emerson, include the UPS model and serial number. These are on the top panel of the
Liebert GXT3.
Vertiv | Liebert® GXT3 ™ Installer/User Guide | 55
To Next Page
Loading...
Need help?
General