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SL-23275QS (9/03) Rev. 0
TROUBLESHOOTING
The information below indicates various symptoms a user may
encounter in the event the PowerSure PST experiences a problem.
Use this information to determine whether external factors caused
the problem. See Troubleshooting Chart for suggested remedy.
GUIDE TO STATUS INDICATORS
1. The Fault indicator
illuminates, indicating the
UPS detected a problem.
2. An alarm sounds, alerting that the
UPS requires attention. The alarm
can be silenced except for low
battery, overload and
overtemperature warning
conditions.
3. Utility and/or Battery indicators
may be illuminated as a diagnostic
aid to the operator, as shown
below:
Fault
(Red)
Site Wiring
Fault (Amber)
Utility/Battery
(Green)
Diagnosis/
Audible Alarm
Normal Mode
—— ON
UPS is
operating in
Normal Mode;
no beep.
— — Flashing
Battery Test
has been
initiated; no
beep.
— Flashing ON
Site Wiring
Fault; no beep.
Flashing — ON
The unit is
overloaded;
beep every
half-second
ON — ON
The UPS has
failed;
continuous
beep
Flashing — —
Unit has shut
down due to
overload;
continuous
beep
ON — —
The UPS shut
down due to
failure;
continuous
beep
Battery Mode
— — Flashing
The UPS is
operating in
Battery mode;
beep every 5
seconds.
— — Flashing
UPS battery is
low; beep every
half-second
Flashing — Flashing
The unit is
overloaded;
beep every
half-second
ON — Flashing
The UPS has
failed;
continuous
beep
Fault
Indicator
Site Wiring
Fault Indicator
Utility/Battery
Indicator
!
+
-
TROUBLESHOOTING CHART
If the UPS fails to operate properly, turn off the unit and repeat
the steps in the Installation section of this manual. If the prob-
lem persists, refer to the chart below:
Problem Cause Solution
UPS will not
start
Overload/
Short circuit
Check the circuit
protector on the side of
the UPS. If it is tripped,
reset it and restart the
UPS.
For further help, call
your local dealer,
Liebert representative
or the Liebert
Worldwide Support
Group.
UPS starts
on battery,
but will not
switch to AC
UPS not
plugged in
Plug in power cord
securely.
Circuit
protector
tripped
Reset the circuit
protector and restart the
UPS.
Power not
available at
utility
receptacle
Have the utility
receptacle checked by a
qualified electrician.
Input voltage
below
threshold
Wait until the voltage
rises to an appropriate
level or have the utility
receptacle checked by a
qualified electrician.
AC
overvoltage
Wait until voltage lowers
to an appropriate level
or have the utility
receptacle checked by a
qualified electrician.
UPS shuts
down, Fault
Indicator lit
Overload/
Short circuit
Check the circuit
protector on the rear of
the UPS. If it is tripped,
reset it and restart the
UPS.
If the problem persists,
disconnect some of the
equipment from your
UPS—the total wattage
of your equipment must
not exceed the capacity
of the UPS. For further
help, call your local
dealer, Liebert
representative or the
Liebert Worldwide
Support Group.
Internal UPS
fault
Site Wiring
Fault
Indicator
illuminated
Line-neutral
reversal/Poor
ground
connection
Have the utility checked
by a qualified
electrician.
UPS not
providing
expected
backup time
Overload Reduce load.
Battery not
charged due
to a recent
outage
Recharge battery.
MAINTENANCE
The PowerSure PST UPS requires very little maintenance. Follow these
practices to prevent problems.
CLEANING THE UPS
The following will help ensure trouble-free operation for years:
• Vacuum dust from the ventilation intake occasionally.
• Wipe the cover periodically with a dry cloth.
MAINTAINING BATTERIES
The batteries are valve-regulated, nonspillable, lead acid and must be
kept charged to retain their design life. The UPS continuously charges the
batteries when connected to the utility supply, even while the UPS is
switched off.
When storing the UPS, it is recommended to plug in the UPS for at least
24 hours every four to six months to ensure full recharge of the batteries.
WARRANTY REGISTRATION
To register for warranty protection:
• Visit the Quick Links section of our Web site at:
http://www.liebert.com
• Click on Product Warranty
Registration and fill in the form.
IF YOU HAVE ANY QUESTIONS,
PLEASE CONTACT US AT:
US: 800-222-5877
Outside the US: 614-841-6755
upstech@liebert.com