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Troubleshooting
33
When reporting a UPS issue to Emerson, include the UPS model and serial number. These are on the
top panel of the Liebert
®
GXT3
™
.
Fault and Bypass indicators and
diagnostic B indicator are
illuminated
UPS internal DC bus overvoltage
UPS requires service. Contact Emerson
Channel Support.
Fault and Bypass indicators and
diagnostic C indicator are
illuminated
UPS DC/DC fault
UPS requires service. Contact Emerson
Channel Support
Fault indicator and diagnostic D
indicator are illuminated
UPS PFC (Power Factor Correction
Circuit) fault
UPS requires service. Contact Emerson
Channel Support
Fault and Bypass indicators and
diagnostic E indicator are
illuminated
UPS inverter fault
UPS requires service. Contact 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 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
condition and Battery Charger
Failure) and continuous alarm
Ensure fan is not blocked. 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 alarm and UPS
will not start in standby status. This is
active only when power is first
applied to the input. Once the UPS is
running, the AC input indictor 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 alarm
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
Table 10 Troubleshooting (continued)
Problem Cause Solution