APC ES 350G User Manual

The battery is disconnected, and either power is 
unavailable at the wall outlet, or utility power is 
having a “brownout” or an “over voltage” 
condition. 

Connect the battery (see Connect Battery) and ensure power is available at the wall outlet.  If 
battery is connected and power is unavailable, the unit can be “cold started” (operated on 
battery power) by holding the power button down until two beeps are heard. 

Surge Protection outlets were overloaded.

Reduce the amount of equipment plugged into the Surge Protection outlets.

Utility power not available at the wall outlet. 

Ensure 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.

Battery is disconnected. 

Connect the battery (see Connect Battery diagram).

Equipment is connected to the “Surge Protection” 
outlets.

Ensure 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 Only” outlets.

The Back-UPS ES is overloaded.

Make sure the equipment plugged into the outlets of the unit are not overloading its

 

capacity. 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 power.

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 expecting maximum runtime.

Connected equipment does not accept the step-
approximated sine waveform from 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.

The Back-UPS ES may require service.

Contact APC Technical Support for further troubleshooting. 

The Back-UPS ES is On Battery.

The Back-UPS ES is operating normally, and using battery power. Once On Battery, you may 
want to 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.

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 twice 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. 

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

Call a qualified electrician for service.

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.

Data line from the ISP or wall outlet is connected 
to the wrong jack on the Back-UPS.

Make sure the data line from the wall outlet is connected to the jack labeled “Wall Outlet”.

Modem lost AC power. 

Plug the modem’s AC power cord into one of the “Battery Back-up Plus Surge Protection 
outlets”. 

Online Technical Support:

http://support.apc.com
http://www.apc.com/support
esupport@apcc.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

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.

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).

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 
Support.

The standard warranty is 3 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.

Replace with an APC qualified battery. Replacement batteries can be ordered from 
www.apc.com (valid credit card required). The replacement battery part number for 
this Back-UPS 350 is RBC 35.

Input

Voltage

120 Vrms nominal

Frequency

 60 Hz + 3

Brownout Transfer

92 Vrms, typical

Over-voltage Transfer

139 Vrms, typical

Output

UPS Capacity (3 outlets)

350 VA; 200 W

Total Amperage (6 outlets)

8 Amps (including UPS output)

Voltage - On Battery

115 Vrms + 8% (step-approximated sine wave)

Frequency - On Battery

60 Hz + 1 Hz

Transfer Time

6 ms typical, 10 ms maximum

Protection and 
Filter

AC Surge Protection

Full time, 340 joules

Phone/fax/DSL 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

3 - 5 years depending on the number of discharge cycles 

and environmental temperature

Physical

Net Weight

8.6 lb (3.9 kg)

Size

10.6 in (H) x 6.3 in (W) x 3.5 in (D)

(26.9 cm x 16 cm x 8.8 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 and 
Regulatory

Safety Approvals

TUV C-US certified; UL 1778 standard per CSA 

standard C22.2 No. 107.3, FCC part 68 & 

FCC part 15 Class B, NOM certified 

EMC Compliance

Notice: This device complies with part 68 and 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.
“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.”

APC, Back-UPS and PowerChute are registered trademarks of American Power Conversion Corp.

990-3312A Copyright © 2008 American Power Conversion Corp.

All other trademarks are property of their respective owners.