Back-UPS ES 350/550
User Guide
w w w.apc.com
Connect Battery
For safety, the Back-UPS ES is shipped with one battery wire disconnected. The Back-UPS ES will not operate until the wire is connected to the touch
safe battery terminal. NOTE: Small sparks may occur during battery connection. This is normal.
TURN the Back-UPS ES over and
slide the battery compartment
cover off of the battery housing.
LIFT the battery out of the compartment and connect the black wire to the negative (-) battery
terminal. Ensure the batteries are installed as shown below.
Slide the battery compartment cover
completely onto the Back-UPS ES.
Back-UPS ES 550
Back-UPS ES 350
Battery Backup
Surge Protection
Connect Equipment
Place the Back-UPS ES to avoid:
- Direct sunlight
- Excessive heat
- Excessive humidity or contact with fluids
Plug the Back-UPS ES power cord directly into a wall outlet; not a
surge protector or power strip.
These outlets are powered whenever the Back-UPS ES is
switched ON. During a power outage or other utility problems
(brownouts, over-voltages), these outlets will be powered for a
limited time by the Back-UPS ES. Plug your computer, monitor,
and two other data-sensitive devices (external disk or tape drive)
into these outlets.
Connect FAX/Modem/Phone
Back-UPS ES protects a single line (2-wire) fax, modem or phone from
surges when it is connected through the Back-UPS ES as shown.
Connect Computer Cable
The supplied cable and software provide automatic file saving and
shutdown of the operating system in the case of a sustained power outage.
w w w.apc.com
Battery Backup
Connect the cable to the Data Port of the Back-UPS ES. Connect the other
end of the cable to the USB port on your computer. The software will
automatically find the USB Port of your computer.
Surge Protection
Surge Protection Only
Power On
Replace Battery
CAUTION - Refer to bottom
of unit for safety markings.
Circut Breaker
Push to Reset
Data Port
Surge Protection Only
These outlets provide full-time protection from surges even if
the Back-UPS ES is switched OFF. Plug your printer, fax
machine, scanner, or other peripherals that do not need
battery power into these outlets.
Status Indicators
Power On and
Install Software
Press the ON/OFF switch to power the unit
A single short beep and the green “Power On”
indicator confirms that Back-UPS ES is on and
ready to provide protection.
The Back-UPS ES should charge for at least
16 hours to ensure sufficient runtime. The unit
is being charged whenever it is connected to
utility power, whether the unit is turned ON or
If the red Building Wiring Fault indicator
(located on the end near the power cord) is lit,
your building wiring presents a shock hazard
that should be corrected by a qualified
Install the PowerChute Personal® Edition
Place the PowerChute Personal Edition CDROM into your computer and follow the
installation instructions on the screen.
990-4993A Copyright 2006 American Power Conversion Corporation
The Back-UPS ES indicates operating status using a combination of visual and audible indicators.
Use the following table to identify the status of the Back-UPS ES.
Visual Indications
(Power On - Green)
(Replace Battery - Red)
Audible Indication
Alarm Terminates
Power On - UPS is supplying conditioned
utility power to the load.
Power On LED - ON
Not applicable.
On Battery - UPS is supplying battery
power to the load connected to the Battery
Power On LED - ON (off
during beep)
Beeping 4 times every
30 seconds
UPS transfers back to
Power On operation, or
when UPS is turned off.
Low Battery Warning - UPS is supplying
battery power to the load connected to the
Battery outlets and the battery is near
Power on LED - flashing
Rapid beeping (every
1/2 second)
UPS transfers back to
normal operation, or
when UPS is turned off.
Replace Battery - The battery is
Replace Battery LED flashing
Constant tone
UPS turned off with the
power switch.
The battery is in need of charging or is at
the end of its usual life and must be
Power On and Replace
Battery LEDs- Flashing
Constant tone
Overload Shutdown - During On Battery
operation a battery power supplied outlet
overload was detected.
Constant tone
UPS turned off with the
power switch.
Sleep Mode - During On Battery operation
the battery power has been completely
exhausted and the UPS is waiting for utility
power to return to normal.
Beeping once every 4
Utility power is restored,
or if utility power is not
restored within 32
seconds, or the UPS is
turned off.
Building Wiring Fault - Your building
wiring presents a shock hazard that should
be corrected by a licensed electrician.
Building Wiring Fault LED
(red) - ON
UPS is unplugged, or is
plugged into a properly
wired outlet.
See the Troubleshooting section for additional assistance.
APC, the APC logo, Back-UPS and PowerChute are registered trademarks of American Power Conversion Corp.
All other trademarks are property of their respective owners.
Use the table below to solve minor Back-UPS ES installation or operation problems. Consult APC Online Technical Support or call APC
Technical Support for assistance with problems that cannot be resolved using the table below:
Probable Cause
Back-UPS ES will not turn on.
Battery is disconnected and utility power is not available at
the wall outlet.
Connect the battery (see Connect Battery) and ensure power is available at the wall
No power available at the Surge Protection
Only outlets.
Surge Protection Only outlets have been overloaded.
Reduce the amount of equipment plugged into Surge Protection Only outlets.
Utility power not available at the wall outlet.
Ensure that the fuse or circuit breaker for the outlet is not tripped, and that the wall
switch controlling the outlet (if any) is in the ON position.
Equipment is connected to the “Surge Protection Only”
Ensure that the equipment you want to stay powered during a power failure is
plugged into the “Battery Backup/Surge Protection” outlets and NOT the “Surge
Protection Only” outlets.
The Back-UPS ES is overloaded.
Make sure that the equipment plugged into the outlets of the unit are not
overloading the capacity of the unit. Try removing some of the equipment and see if
the problem continues.
PowerChute Personal Edition software has performed a
shutdown due to a power failure.
The Back-UPS ES is operating normally.
The Back-UPS ES has exhausted its available battery
The Back-UPS ES can only operate on battery power for a limited amount of time.
The unit will eventually turn off when the available battery power has been used.
Allow the unit to recharge for 16 hours before continuing use of the unit.
Connected equipment does not accept the stepapproximated sine waveform the Back-UPS ES.
The output waveform is designed for computers and computer-related equipment. It
is not designed for use with motor-type equipment.
Connected equipment loses power.
The Back-UPS ES may require service.
Contact APC Technical Support for further troubleshooting.
The Power On indicator is lit and the BackUPS ES is beeping four times every 30
The Back-UPS ES is using battery.
The Back-UPS ES is operating normally and using battery power. Once On Battery,
you should save your current work, power down your equipment, and turn the unit
OFF. Once normal power is restored, you may turn the unit back ON and power
your equipment.
The Power On indicator flashes once per
second and the Back-UPS ES beeps once
per second at the same time.
Battery capacity is low (about 2 minutes of use remaining).
The Back-UPS ES is about to shut off due to a low battery charge condition! When
the unit beeps once every second, the battery has about 2 minutes of power
remaining. Immediately power down your computer and turn the unit OFF. When
normal power returns, the unit will recharge the battery.
Building Wiring Fault indicator is lit.
Your building wiring presents a shock hazard. Using the
Back-UPS with this condition will void the warranty.
Call a qualified electrician for service.
Inadequate runtime.
The battery is not fully charged.
Allow the unit to charge by leaving it plugged into the wall at least 16 hours.
Battery is near the end of useful life.
As a battery ages, the amount of runtime available will decrease. You can replace
the battery by ordering one at www.apc.com. Batteries also age prematurely if the
Back-UPS ES is placed near excessive heat.
Order Replacement Battery
120 Vrms Nominal
50 - 60 Hz (autosensing)
Brownout Transfer
88 Vrms, typical
Over-voltage Transfer
139 Vrms, typical
UPS Capacity (4 outlets)
350 VA / 200 W
On Battery
115 Vrms + 8%
(step-approximated sine wave)
Transfer Time
Telephone Surge Protection
50-60 Hz + 1 Hz
6 ms typical, 10 ms maximum
Average Life
Net Weight
Single line (2-wire)
DO NOT RETURN Back-UPS ES to the place of purchase under any circumstances.
Full time
1. Consult the Troubleshooting section to eliminate common problems.
Resettable circuit breaker
Sealed, maintenance-free lead acid
2. Verify the battery is connected (see Connect Battery) and that the Circuit Breaker is
not tripped (see Troubleshooting section).
3 - 5 years depending on the number of discharge
cycles and environmental temperature
If you still have problems or questions, please contact APC via the internet or at one of
the phone numbers listed below.
9 lbs. (4 kg.)
13 lbs. (6 kg.)
Dimensions (H x W x D)
3.4" x 10.9" x 7.1"
(8.6 x 27.7 x 18.0 cm)
Operating Temperature
+32oF to 104oF (0oC to 40oC)
Storage Temperature
+5oF to 113oF (-15oC to 45oC)
Operating Relative Humidity
Operating Elevation
Full time, 375 joules
EMI/RFI Filter
AC Input
The standard warranty is 3 years from the date of purchase. The APC standard
procedure is to replace the original unit with a factory reconditioned unit. Customers
who must have the original unit back due to assigned asset tags and set depreciation
schedules must declare such a need at first contact with APC Technical Support. APC
will ship the replacement unit once the defective unit is received by the repair
department or cross-ship upon the provision of a valid credit card number. The
customer pays for shipping to APC, and APC pays ground freight transportation costs
back to the customer.
550 VA / 330 W
12 Amps (including UPS output)
Protection and Filter AC Surge Protection
Surge Capacity (8 outlets)
Frequency - On Battery
Replace with an APC qualified battery. Replacement batteries can be ordered from
www.apc.com (valid credit card required). For a Back-UPS ES 350, order RBC35 as
directed by APC Technical Support. For a Back-UPS ES 550, order APCRBC110.
3. Before contacting APC, please be sure to record the date purchased, UPS model,
and serial number (on bottom of unit).
4. Be prepared to troubleshoot the problem over the telephone with a Technical
Support Representative. If this is not successful, the representative will issue a Return
Material Authorization Number (RMA#) and a shipping address.
5. Pack the unit in its original packaging. If the original packaging is not available, ask
APC Technical Support about obtaining a new set. Pack the unit properly to avoid
damage in transit. Never use foam beads for packaging. Damage sustained in transit is
not covered under warranty (insuring the package for full value is recommended).
0 to 95% non-condensing
0 to 10,000 ft (0 to 3,000m)
Safety Approvals
cTUVus per UL 1778;
CSA C22.2 No. 107.3-05; NOM-001
EMC Compliance
FCC part 68, FCC part 15 Class B
Notice: This device complies with part 15 of
the FCC rules. Operation is subject to the
following two conditions: (1) This device may
not cause harmful interference, and (2) This
device must accept any interference received,
including interference that may cause
undesired operation.
6. Write the RMA# on the outside of the package.
7. Return the unit by insured carrier to the address given to you by APC Technical
APC Contact Information
On the bottom of this equipment is a label that
contains, among other information, the FCC
registration number and ringer equivalence
number (REN) for this equipment. If
requested, this information must be provided
to the telephone company.
Online Technical Support
Web Site
6.50 in.
(165 mm)
Wall Mounting Template
+52.292.0253 / 52.292.0255
Download PDF