Liebert GXTTM - Manual (Page 15)

13
TROUBLESHOOTING GUIDE
PROBLEM CAUSE SOLUTION
Fault and Bypass
indicators and all load
level LED's are
illuminated UPS overloaded or load
equipment is faulty Check load level display and
remove non-essential loads.
Recalculate load VA and
reduce number of loads
connected to UPS. Check load
equipment for faults.
Fault and Bypass
indicators and
diagnostic LED A are
illuminated UPS internal fan has a
problem or UPS
shutdown due to
temperature condition.
Load is on bypass
power. Press Alarm silence button.
Once the temperature is
reduced, the UPS will restart
and transfer the connected
equipment to inverter power
automatically.
Fault and Bypass
indicators and
diagnostic LED B are
illuminated UPS internal DC bus
over voltage UPS requires service. Contact
your dealer or technical
support.
Fault and Bypass
indicators and
diagnostic LED D are
illuminated UPS PFC fault. UPS requires service. Contact
your dealer or technical
support.
Fault and Bypass
indicators and
diagnostic LED E are
illuminated UPS inverter fault. UPS requires service. Contact
your dealer or technical
support.
Fault indicators and
diagnostic LED A & C
are illuminated UPS failed the battery
test. Replace batteries. Contact
your dealer or technical
support.
Fault indicators and
diagnostic LED C & E
are illuminated
UPS shutdown due to 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 dealer
or technical support.