Troubleshooting Guide - Liebert GXT2U User Manual

Troubleshooting Guide

Problem
UPS fails to start
when the ON button
is pressed.
Battery indicator
LED is illuminated.
UPS has reduced
battery time.
Fault and Bypass
indicator LEDs and
all load level LEDs
are illuminated.
Fault and Bypass
indicator LEDs and
diagnostic LED A are
illuminated.
Fault and Bypass
indicator LEDs and
diagnostic LED B are
illuminated.
Fault and Bypass
indicator LEDs and
diagnostic LED C
are illuminated.
Cause
UPS is short circuited or over-
loaded.
UPS not plugged in.
UPS input protection fuse has
blown/opened.
Utility voltage out of UPS input
range.
Batteries are not fully charged.
UPS is overloaded.
Batteries may not be able to
hold a full charge due to age.
UPS overloaded or load equip-
ment is faulty.
UPS internal fan has a problem
or UPS shutdown due to tem-
perature condition. Load is on
bypass power.
UPS internal DC bus overvolt-
age.
UPS control power supply fault.
Ensure UPS is OFF. Disconnect
all loads and ensure nothing is
lodged in output receptacles.
Ensure loads are not defective
or shorted internally.
UPS is operating from battery
mode, make certain UPS is
securely plugged into the wall
receptacle.
UPS is operating from battery
mode. Save data and close
applications. Replace UPS
input fuse, then restart UPS.
UPS is operating from battery
mode. Save data and close
applications. Ensure utility sup-
ply voltage is within acceptable
limits for UPS.
Keep UPS plugged in continu-
ously at least 24 hours to
recharge batteries.
Check load level display and
reduce the load on the UPS.
Replace batteries. Contact your
local dealer, Liebert representa-
tive or the Liebert Worldwide
Support Group for replacement
battery kit.
Check load level display and
remove non-essential loads.
Recalculate the load and
reduce number of loads con-
nected to UPS. Check load
equipment for faults.
Ensure UPS is not overloaded,
ventilation openings not
blocked, or room ambient tem-
perature is not excessive. Wait
30 minutes to allow UPS to
cool, then restart UPS. If UPS
does not restart, contact your
local dealer, Liebert representa-
tive or the Liebert Worldwide
Support Group.
UPS requires service. Contact
your local dealer, Liebert repre-
sentative or the Liebert World-
wide Support Group.
UPS requires service. Contact
your local dealer, Liebert repre-
sentative or the Liebert World-
wide Support Group.
26
Solution