Vertiv | Liebert® GXT RT+ | Installer/User Guide
21
Chapter 4: Troubleshooting
If the UPS system does not operate correctly, please use the table below to resolve the problem.
SYMPTOM
POSSIBLE CAUSE
REMEDY
No indication and alarm even though the mains is
normal
The AC input power is not connected
well
Check if the input power cord is firmly
connected to the mains
The AC input is not connected to the
UPS output
Plug the AC input power cord to AC
input correctly
The icon and flashing on LCD display and
alarm is sounding every second
The external or internal battery is
incorrectly connected
Check if all batteries are connected
well
Fault code is shown as 27 and the icon is
lighting on LCD display and alarm is continuously
sounding
Battery voltage is too high or the
charger has faulted
Contact Vertiv
Fault code is shown as 28 and the icon is
lighting on LCD display and alarm is continuously
sounding
Battery voltage is too low or the
charger has faulted
Contact Vertiv
The icon and is flashing on LCD
display and alarm is sounding twice every second
UPS is overloaded
Remove excess loads from UPS output
UPS is overloaded. Devices connected
to the UPS are fed directly by the
electrical network via the Bypass.
Remove excess loads from UPS output
After repetitive overloads, the UPS is
locked in the Bypass mode. Connected
devices are fed directly by the mains
Remove excess loads from UPS output
first. Then shut down the UPS and
restart it
Fault code is shown as 43 and The icon is
lighting on LCD display and alarm is continuously
sounding
The UPS shut down automatically
because of overload at the UPS output
Remove excess loads from UPS output
and restart it
Fault code is shown as 14 and the icon is
lighting on LCD display alarm is continuously
sounding
The UPS shut down automatically
because short circuit occurs on the
UPS output
Check output wiring and if connected
devices are in short circuit status
Fault code is shown as 1, 2, 3, 4, 11, 12, 13 , 41 and 45
on LCD display and alarm is continuously sound
A UPS internal fault has occurred.
There are two possible results:
1. The load is still supplied, but directly
from AC power via bypass.
2. The load is no longer supplied by
power.
Contact Vertiv
Battery backup time is shorter than nominal value
Batteries are not fully charged
Charge the batteries for at least 5
hours and then check the capacity. If
the problem still persists, consult Vertiv
Batteries defect
Contact Vertiv to replace the battery
Fault code 05 is shown on LCD display. At the same
time, the alarm is continuously sounding and the
output is off
A UPS internal fault has occurred and
BUS is short circuited
Consult Vertiv. If the UPS power is on
again before repair, the DC/DC mosfet
will damage
