Liebert PST4 User Manual

660 - 850 VA User Manual
Thank you for purchasing the Liebert PST4 Uninterruptible Power Supply. It is designed,
manufactured, and tested to provide many years of reliable power protection.
Please review this manual and the important safety instructions before installing, operating, or
maintaining your Liebert PST4 UPS.
CAUTION
!
Connect the UPS only to a properly grounded/earthed outlet that is protected by
an appropriate branch circuit protector (circuit breaker of fuse) that meets national
and/or local electrical codes.
The Liebert PST4 should be located near the wall outlet. Do not use extension cords between the
wall outlet and the UPS. The Liebert PST4 is designed for small office and home use only. It is not
recommended to be used with life-support equipment or applications.
WARNING
!
Risk of Electric Shock. Observe all cautions and warnings in this manual. Failure
to do so may result in serious injury or death. Refer all UPS and battery service to
properly trained and qualified service personnel. Do not attempt to service this
product yourself beyond the battery replacement procedures. Opening or
removing the cover may expose you to lethal voltages within this unit even when it
is apparently not operating and the input wiring is disconnected from the electrical
source. Never work alone.
In case of fire, use a dry chemical fire extinguisher to put out the fire. Using a fluid fire extinguisher
may cause electric shock. In the event of an emergency, press and hold the ON/OFF button for at
least one (1) second to turn off the UPS then unplug the UPS from the wall outlet.
NOTICE: This equipment has been tested and found to comply with the limits for a Class B
computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules and
also meets the Class B limits for radio noise emissions from digital apparatus set out in the Radio
Interference of the Canadian Department of Communications. These limits are designed to provide
reasonable protection against such interference in a residential installation. This equipment
generates and uses radio frequency and if not installed and used properly, that is, in strict
accordance with the manufacturer's instructions, this equipment may cause interference to radio
and television reception. If this equipment does cause interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
• Re-orient the receiving antenna.
• Relocate the computer with respect to the receiver.
• Move the computer away from the receiver.
• Shielded communication-interface cables must be used with this product.
WARNING
!
Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user's authority to operate the
equipment.
The Liebert PST4 is shipped with the following items:
®
• CD with Liebert MultiLink Shutdown Software and User manual (electronic version)
• USB cable; one 2 m (6-1/2 ft.) long
• Coax cable; one 1 m (3 ft.) long
• Wall-mount template and screws
• User Manual with warnings safety instructions and WEEE recycling sheet
(ISO 14001 compliance)

Setup and Start-up

Inspect the UPS for any signs of obvious damage. If damage is visible, do not proceed with the
setup and call our warranty support line for a new replacement unit.
The UPS has 4 battery-backed and surge-protected receptacles and 4 surge-protected-only
receptacles. Plug your critical equipment (such as computer, monitors, etc.) into the battery-backed
receptacles and your less-critical equipment (such as printers and other less-often used
peripherals) into the surge-only receptacles.
If you also want to protect your computer network connection or telephone, you can use the
network/telephone surge-protection ports on the side. Use the "IN" port to connect the line from the
wall jack and the "OUT" port to connect to your device port. Use of this feature is not required
for proper operation of the UPS.
If you also want to protect your cable modem, DSS Receiver, or cable-TV converter connection you
can use the Coax surge protection ports on the side of the UPS. Use the "IN" port to connect the
line from the wall jack and the "OUT" port to connect to your device port. Use of this feature is not
required for proper operation of the UPS.
If you wish to use the USB communications, plug the provided cable into the port on the UPS and
the other end into an open USB port on your computer. This allows unattended shutdown of your
computer using either the built-in feature within the Microsoft
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Liebert Multilink Shutdown software located on the CD that shipped with the UPS. Use of this
feature is not required for proper operation of the UPS.
You are now ready to start the UPS. Plug the UPS input cord into the wall outlet. To turn on the
UPS, press and hold the ON/OFF button until you hear the UPS beep, then release the button. The
connected equipment immediately receives power and the UPS starts a short, self system test
(electronics and battery check). When the unit passes all self checks, only the green LED should
be lit indicating normal operation.
NOTE
While every precaution has been taken to ensure that the battery is in good
condition, we recommend allowing the UPS to charge the battery for at least 4 hours
prior to providing full back-up time protection for any utility-power abnormality.

UPS Operation

The UPS is designed for easy operation. Once the UPS is plugged into the wall outlet, it begins to
charge the battery whether the UPS has been turned on or not.
To turn on the UPS, press and hold the ON/OFF button until the unit beeps, then release the
button.
To turn off the UPS, press and hold the ON/OFF button for at least 1 second then release the
button. To completely stop all UPS operation, once the UPS is turned off, unplug the input cord
from the wall outlet.
During normal operation, the UPS protects the connected equipment from utility abnormalities,
such as brownout/sags, over-voltage/surges, and complete outages. During these periods, the
UPS automatically draws power form the battery to support the connected equipment that is
plugged into the battery-backed outlets. Note that equipment plugged into the surge-only outlets
shut down in these conditions. If the utility power problems are long-term, the UPS will eventually
shut down because all battery power is exhausted. Once utility power is restored normal operating
parameters for the UPS, it automatically restarts and begins to power the connected equipment
and to recharge the battery for the next utility abnormality.
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Liebert PST4™
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Windows operating system or the
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Controls and Indicators

1. Battery-backed and surge-protected output power receptacles.
2. Input Circuit Breaker. The input circuit breaker trips in the event the output load exceeds the
UPS's power rating.
3. Scroll button, to scroll through the LCD-display parameters and, when on battery power, can
silence the audible alarm.
4. On/Off button.
5. LCD Display with icons and numerical information to display UPS status and operational
parameters.
6. Input Power Cord.
7. Surge-protected-only output-power receptacles.
8. RJ11/45 connectors for phone/fax/modem or network surge protection.
9. RJ45 connector for USB communications port for UPS monitoring and control.
10. Coax Cable connections for cable modem, DSS receiver, or cable-TV converter surge
protection.

Installation

Install the Liebert PST4 in a temperature-controlled environment that is free of corrosive and
conductive contaminants. Avoid locations near heat or water sources and exposed to direct
sunlight. For proper ventilation, leave approximately 2 to 4 inches clearance on all sides of the
UPS.
The UPS unit ships with the internal battery connected.
The UPS may be mounted to a wall using the mounting slots on the bottom of the UPS and
provided screws. A template for screw location is provided and the unit should be mounted
ensuring they are in a wall stud for a secure installation.
NOTE
Before mounting the UPS on the wall, you will need to connect the battery for proper
UPS operation. Refer to the Setup and Start-up procedures that follow.

Alarms

On Battery
When the UPS is operating on the batteries, the On Battery icon on the LCD panel illuminates and
the audible alarm sounds once every 5 seconds. The alarm stops once the UPS returns to the AC
normal mode, or if silenced by pressing and holding the scroll button for 2 seconds. When silenced,
the alarm sounds again if the battery reaches the low-battery level, if the UPS output is overloaded,
or if the UPS has an internal fault.
Low Battery Warning
The UPS sounds 2 beeps every 5 seconds when the battery reserve runs low. This condition
continues until AC returns or the UPS shuts down from battery exhaustion.
Weak/Bad Battery
The UPS automatically tests the battery's condition and, if the battery fails the test, the Battery
Capacity bar graph on the LCD display flashes on/off and the alarm beeps 3 times every 30
seconds until the battery is reconnected or replaced.
We recommended that the UPS charge overnight before performing a battery test to confirm a
Weak/Bad Battery condition.
Overload
When the amount of equipment connected to the UPS exceeds its power rating, the Load Capacity
bar graph on the LCD display flashes on/off and the UPS sounds 1 beep every half second (AC
and Battery modes). The alarm remains on until the excess load is removed or the UPS's self-
protection circuit shuts down the UPS.

UPS Fault

When the UPS detects a hardware fault, the Fault icon on the LCD display illuminates and the UPS
sounds a constant alarm. The fault condition, in some instances, may be reset by turning the UPS
off and then back on.

Troubleshooting

Symptom Possible Cause
UPS will not turn on. On/Off/ button not pressed.
UPS operates in battery mode only,
even though normal AC power is Input AC circuit breaker is tripped.
present.
Fault icon is illuminated. UPS has detected an internal fault.
The AC mode icon is illuminated, The UPS is being controlled via its
but there is no output. communications port.
UPS does not provide expected The batteries may be weak or at the
runtime. end of useful service life.
Battery Capacity bar graph is Loose connections at the batteries,
flashing on and off. Weak batteries, Bad batteries.
Load Capacity bar graph is flashing The load has exceeded the UPS's
on and off. capacity.
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What To Do
Press and release the On/Off button to
start UPS.
Reset circuit breaker by pressing the
plunger back in. If the AC circuit breaker
trips after UPS starts up, reduce the load
on the UPS.
Call for service.
Disconnect the computer cable from the
UPS and press the On button. If UPS
works normally, the software has control of
the UPS. If the UPS still does not have
output power, call for service.
Charge the batteries for 8-hours and
retest. If the runtime is still less than
expected, the batteries may need
re-placed, even though the Weak/ Bad
Battery alarm is not sounding.
Check battery connections, charge the
batteries for 8-hours, replace the batteries.
Check the Specifications table that
follows. Remove part of the load.
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