APC ES 500 User Manual

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:

Back-UPS ES will not turn on.

No power available at the Surge Protection 
outlets.

Connected equipment loses power.

The Power On indicator is lit and the Back-

UPS ES is beeping four times every 30 
seconds.

The Power On indicator flashes once per 
second and the Back-UPS ES beeps once 
per second at the same time.

Building Wiring Fault indicator is lit.

Inadequate runtime.

Battery is disconnected and utility power is not available at 
the wall outlet.

Surge Protection outlets have been overloaded.

Utility power not available at the wall outlet.

Equipment is connected to the “Surge Protection” outlets.

The Back-UPS ES is overloaded.

PowerChute Personal Edition software has performed a 

shutdown due to a power failure.

The Back-UPS ES has exhausted its available battery 
power.

Connected equipment does not accept the step-

approximated sine waveform the Back-UPS ES.

The Back-UPS ES may require service.

The Back-UPS ES is using battery.

Battery capacity is low (about 2 minutes of use remaining).

Your building wiring presents a shock hazard. Using the 
Back-UPS with this condition will void the warranty.

The battery is not fully charged.

Battery is near the end of useful life.

Connect the battery (see Connect Battery) and ensure power is available at the wall 
outlet.

Reduce the amount of equipment plugged into Surge Protection outlets.

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.

Ensure that the equipment you want to stay powered during a power failure is 
plugged into the “Battery Backup plus Surge Protection” outlets and NOT the “Surge 

Protection” outlets.

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.

The Back-UPS ES is operating normally.

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.

The output waveform is designed for computers and computer-related equipment. It 

is not designed for use with motor-type equipment.

Contact APC Technical Support for further troubleshooting.

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 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. 

Call a qualified electrician for service.

Allow the unit to charge by leaving it plugged into the wall at least 16 hours.

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.

Input

Voltage

120 Vrms Nominal

Frequency

47 - 63 Hz

Brownout Transfer

96 Vrms, typical

Over-voltage Transfer

136 Vrms, typical

Output

UPS Capacity (3 outlets)

350 VA / 200 W             500 VA / 300 W

Surge Capacity (6 outlets)

12 Amps (including UPS output)

Voltage
On Battery

115 Vrms +  8%

(step-approximated sine wave)

Frequency - On Battery

50-60 Hz + 1 Hz

Transfer Time

5 ms typical, 8 ms maximum

Protection and Filter AC Surge Protection

Full time, 375 joules

Telephone Surge Protection

Single line (2-wire)

EMI/RFI Filter

Full time

AC Input

Resettable circuit breaker

Battery

Type

Sealed, maintenance-free lead acid

Average Life

2 - 4 years depending on the number of discharge 

cycles and environmental temperature

Physical

Net Weight

9.20 lb. (4.18 kg.)              13.25 lb. (6.02 kg.)

Size

3.3” (H) x 10.9” (W) x 6.9” (D)

(8.3 x 27.8 x 17.5 cm)

Operating Temperature

+32

o

F to 104

o

F (0

o

C to 40

o

C)

Storage Temperature

+ 5

o

F to 113

o

F (-15

o

C to 45

o

C)

Operating Relative Humidity

0 to 95% non-condensing

Operating Elevation

0 to 10,000 ft (0 to 3,000m)

Safety/Regulatory

Safety Approvals

UL 1778 listed, cUL certified per

CSA standard C22.2 No. 107.1

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.

The standard warranty is 2 years from the date of purchase. APC’s 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.

Please DO NOT RETURN Back-UPS ES to the place of purchase under any
circumstances.

1. Consult the Troubleshooting section to eliminate common problems.

2. Verify the battery is connected (see Connect Battery) and that the Circuit Breaker is
not tripped (see Troubleshooting section).

If you still have problems or questions, please contact APC via the internet or at one of
the phone numbers listed below.

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.

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).

5. Write the RMA# on the outside of the package.

6. Return the unit by insured carrier to the address given to you by APC Technical

Support.

Online Technical Support . . .  . .   http://support.apc.com
Web Site . . . . . . . . . . . . . . . . . . .   www.apc.com
USA/Canada . . . . . . . . . . . . . . .   1.800.800.4272
Mexico . . . . . . . . . . . . . . . . . . . . .   +52.292.0253 / 52.292.0255
Brazil . . . . . . . . . . . . . . . . . . . . . . .  +0800.12.72.1
Worldwide . . . . . . . . . . . .  . . . . .  +1.401.789.5735

Replace with an APC qualified battery. Replacement batteries can be ordered from
www.apc.com (valid credit card required). Have your Back-UPS ES model number

available when ordering. Your model number can be found on the bottom of the unit.

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Toll Free: (877) 892-2666