PowerWalker VFI 1000 LE User Manual

CONTENT

1. Product Introduction ...................................................... 3

1.1 Functions description .................................................................... 3

1.2 Mode description ........................................................................... 4

1.3 Front panel .................................................................................... 5

1.4 Rear panel ..................................................................................... 9

1.5 Product specification ................................................................... 11

1.6 Communication port .................................................................... 13

2. Installation ..................................................................... 14

2.1 Installation Safety Instructions .................................................... 14

2.2 Unpacking and Inspection ........................................................... 15

2.3 Installation steps for standard model .......................................... 16

2.4 Installation steps for long back up time model ............................ 16

2.5 Installation for communication software (optional) ..................... 17

3. Operation ...................................................................... 18

3.1 Operation Safety Instructions...................................................... 18

3.2 Start the UPS with mains (AC source) ........................................ 19

3.3 Start the UPS with battery (DC source) only .............................. 19

3.4 Connect loads to UPS ................................................................. 20

3.5 Charge the batteries ................................................................... 21

3.6 Discharge the batteries ............................................................... 21

3.7 Test the batteries ......................................................................... 21

3.8 Turn off the UPS with mains (AC source) ................................... 22

3.9 Turn off the UPS with battery (DC) only ...................................... 23

3.10 Mute the buzzer ........................................................................ 23

3.11 Operation in warning status ...................................................... 23

3.12 Operation in fault mode ............................................................. 24

3.13 Indication summary in normal operation ................................... 25

- 1 -

4. Maintenance .................................................................. 26

4.1 Maintenance Safety Instructions ................................................. 26

4.2 Typical Trouble Shooting ............................................................. 28

4.3 Battery Maintenance ................................................................... 31

4.4 Contact the service center .......................................................... 31

5. Transport and Storage ................................................. 32

- 2 -

1. Product Introduction

1.1 Functions description

 This product is a true online double-conversion UPS (Uninterruptible

Power Supply). It provides perfect protection for critical load such as
computer system. It can eliminate almost all mains power disturbances.
The input AC current can be corrected to a wave following the mains
voltage, so it is a high power factor system. Through the PWM control
technology, the output voltage can be a pure & stable sine wave AC
voltage.

 When the mains input become abnormal, the controller will stop the

AC/DC and start the DC/DC section immediately to make sure the
DC/AC (inverter) section can continue to work. After the mains input
comeback to normal range, the DC/DC will be stopped and the AC/DC
works again. So the load is always power-supplied through inverter
without any interrupt if the UPS is turned on.

 The UPS also provides an internal bypass way to make the load can be

powered by mains input directly when the UPS is off or failed.

 The UPS have an internal charger for batteries, the charger will charge

the batteries when the mains is in a reasonable range on “bypass mode”
or “line mode”.

- 3 -

1.2 Mode description

 Bypass mode

Bypass mode means that the UPS provides the power through the internal
bypass way to load directly without any regulation. If the controller detects the
mains is abnormal, it will shut off the output to protect the load. The bypass
voltage/frequency range and default output status (on/off) could be set by
communication software.

 Line mode

Line mode means that the mains input is rectified/converted by the AC/DC
section and then inverted to stable output by DC/AC section. In line mode,
the output is clean and good to the loads. If the mains get abnormal, the UPS
will transfer to battery mode without interrupt.

 Battery mode

Battery mode means that the battery power goes through the DC/DC section
to the inverter (DC/AC) and get a stable backup output when the mains input
is not usable. If the mains input recovered, the UPS will transfer to line mode
without interrupt.

 Battery test mode

In this mode, the UPS will stop the AC/DC section and discharge the battery
while mains input is normal. If the controller found the battery is error, it will
transfer back to line mode immediately, and warning by display to see
whether the battery needs to be replaced. The battery test mode could be
trigged in line mode by pressing the button or by the communication
command.

 Fault mode

If the UPS generates some internal failure and have to stop its inverter, it will
go into fault mode and alarm by display and buzzer.

In fault mode, the loads have the risk of power loss because the output will
come from the bypass after UPS fault.

- 4 -

1.3 Front panel

1.3.1 Front view

1K/1KS 2K/2KS/3K/3KS

- 5 -

LED display

1.3.2

 LED definition

There are total 6 LEDs to indicate the status of UPS.

LED No. Colour Name Function

Indicate the load level in line mode

1~3 Green

Load/Battery
level LED

or bypass mode.
Indicate the battery level in battery

mode.

4 Green

5 Orange

6 Red

Inverter status
LED

Bypass/Batter
y mode LED

Fault/Warning
mode LED

- 6 -

If it is turned on constantly, it shows
that the load current is supplied
from utility power or battery via the
inverter.

If it is turned on constantly, it shows
that the UPS is in battery mode,
and the load current is from battery
via the inverter.

If it is flashing, it shows that the
UPS is in bypass mode, and the
load current is directly from the
utility power.

If it is turned on constantly, it shows
that the UPS is in fault mode;

If it is flashing, it shows that the
UPS is in warning status.

 LED action summary

LED No.

Bypass mode
Line mode
Battery mode
Battery test mode
Fault mode
Warning

○: Lightened according to load level
◎: Lightened according to battery level
◇: Depended on the fault/warning status
□: Depended on the original display

●: Lightened constantly
★: Flashing

1 2 3 4 5 6

○ ○ ○
○ ○ ○ ●
◎ ◎ ◎ ● ●
◎ ◎ ◎ ● ★
◇ ◇ ◇ ◇ ◇ ●
□ □ □ ◇ □ ★

★

1.3.3 Button

There is only one button for ON/OFF/Mute function on this product. The
controller can distinguish the command according to the operation time
deference.

(1) Button action description

Button actions are distinguished with “short-press” and “long-press”. Please
refer to the following tables for the detail.

Button action type Definition

Short-press Press the button more than 0.04s and less than 0.5s

Long-press Press the button more than 2s

Invalid press Press the button more than 0.5s and less than 2s.

- 7 -

(2) UPS response to the button

Original mode Button action UPS response

Long-press Turn on the UPS into battery mode.

Power off (cold
status)

Bypass mode

Other press

Long-press Turn on the UPS into line mode.

Short-press

The internal power supply is trigged for a
short time and then shutdown.

Mute the buzzer if there is a warning or
alarming.

Line mode

Battery mode

Battery test
mode

Fault mode

Long-press Turn into bypass mode.

Short-press Turn into battery test mode.

Long-press Turn off the UPS.

Short-press Mute the buzzer.

Long-press Turn into bypass mode.

Short-press Turn into line mode.

Long-press

Short-press Change the beep status of buzzer.

Turn into bypass mode or shutdown,
dependent on the fault type.

- 8 -

1.4 Rear panel

1K 1KS

2K 2KS

- 9 -

3K 3KS

/ Communication port (USB or RS232)
 Mains input protection
 Mains input power cord
 Output socket
 External battery terminal block

- 10 -

1.5 Product specification

1.5.1 Model description

This manual is applicable to the following models:

Model

Power

name

rating

PowerWalker

VFI 1K

PowerWalker

VFI 1KS

1000VA/700W 2000VA/1400W 3000VA/2100W

PowerWalker

VFI 2K

PowerWalker

VFI 2KS

PowerWalker

VFI 3K

PowerWalker

VFI 3KS

Note: The model names without “S” represent standard model with internal

battery. The model names with “S” represent long backup time model
with external battery.

1.5.2 Environment specification

Model name

Operating
Temperature

Storage
Temperature

Altitude

Relative
Humidity

Noise Level <45dB @ 1 meter from front panel

PowerWalker

VFI 1K

PowerWalker

VFI 1KS

PowerWalker

VFI 2K

<1000m @ full load
<2000m @ 90%load
<3000m @ 80%load
<4000m @ 70%load

PowerWalker

0-40°C

0-40°C

<95%

VFI 2KS

PowerWalker

VFI 3K

PowerWalker

VFI 3KS

1.5.3 Mechanical Specification

Model name

Dimension

(W×H×D)

(mm)

Weight

(Kg)

PowerWalker

VFI 1K

9.8 5.2 20 10.8 24.6 10.8

PowerWalker

VFI 1KS

144×220×345 190×318×369 190×318×369

PowerWalker

VFI 2K

PowerWalker

VFI 2KS

PowerWalker

VFI 3K

PowerWalker

VFI 3KS

- 11 -

1.5.4 Electrical Specification

Model name

Power 1000VA/700W 2000VA/1400W 3000VA/2100W

Input

Current
(Max.)

Voltage
Range

Frequency
Range

Input Power
Factor

Output

Voltage 208/220/230/240VAC (sine-wave)

Frequency

THD

Voltage Regulation

Overload Capacity

Efficiency

PowerWalker

VFI 1K

PowerWalker

VFI 1KS

5A 6A 10A 11A 15A 16A

176~276VAC @ full load (110~276VAC @ half load)

46 ~ 54Hz @ 50Hz system / 56 ~ 64Hz @ 60Hz system

PowerWalker

VFI 2K

Synchronizing mains input @ line mode

50/60Hz ± 0.2 Hz @ battery mode

Line mode: 60s @ 100%~130%; 1s @ > 130%

Battery mode: 10s @ 100%~130%; 1s @ >130%

PowerWalker

VFI 2KS

≧0.98 @ full load

≦4% ( Linear load )

± 2%

PowerWalker

VFI 3K

PowerWalker

VFI 3KS

Line Mode 86%

Battery Mode 80% 83% 83%

Battery & Charger @ 25℃℃℃℃

Total battery rating voltage 24VDC 48VDC 72VDC

Backup Time (Half Load) >9min >9min >9min

Recharge Time (to 90%) 5Hours 5Hours 5Hours

Charging Current (Max.) 1A 4A 1A 4A 1A 4A

Discharging Current (Max.) 44A 42A 42A

Rated Charging Voltage 27.3Vdc 54.6Vdc 81.9Vdc

- 12 -

1.5.5 Standards

* Safety

IEC/EN 62040-1-1

* EMI

Conducted Emission........................:IEC/EN 62040-2 Category C1

Radiated Emission...........................:IEC/EN 62040-2 Category C1

Harmonic Current.............................:IEC/EN 61000-3-2 (Input Current≤16A)

Voltage Fluctuation and Flicker........:IEC/EN 61000-3-3 (Input Current≤16A)

*EMS

ESD.................................................... :IEC/EN 61000-4-2 Level 4

RS.......................................................:IEC/EN 61000-4-3 Level 3

EFT..................................................... :IEC/EN 61000-4-4 Level 4

SURGE.............................................. :IEC/EN 61000-4-5 Level 4

CS...................................................... :IEC/EN 61000-4-6 Level 3

Power-frequency Magnetic field......... :IEC/EN 61000-4-8 Level 3

Low Frequency Signals.......................:IEC/EN 61000-2-2

1.6 Communication port

The communication port is for the monitoring software. There are 2 options:
RS232 or USB. There is only one option can work in the same time and same
product.

 RS232 (optional)

Pin assignment and description of DB-9 connector:

Pin# Definition

2 TXD (output)
3 RXD (input)
5 GND

 USB (optional)

The USB port is compliance with USB 1.1 protocol for its communication
software.

- 13 -

2. Installation

2.1 Installation Safety Instructions

You must read the following safety instructions
before installation!

 Installation Personnel

This product must be installed only by qualified or
professional personnel accord to safety instructions!

 Installation Environment

Do not install and operate the UPS when water condensation happen
which may occur if the UPS is moved directly from a cold to a warm
environment. The UPS must be absolutely dry before being installed and
operated. Please allow an acclimatization time of at least 2 hours. Otherwise
there is hazard of electric shock!

Do not install the UPS in the environment where it is damp or would
be exposed to direct sunlight or near heat. Ensure the UPS is far away from
water, inflammable gas and corrosive agents.

Do not block air vents in the housing of UPS. The UPS must be
installed in a location with good ventilation. Ensure enough space on each
side for ventilation.

- 14 -

 Wiring & Grounding

Installation and Wiring must be performed in accordance with the

local electrical laws and regulations.

The UPS must be securely grounded. If there are external UPS
battery cabinets, please make sure the battery cabinets have the
equipotential earth bonding to the UPS main cabinet.

An appropriate switch device as backup protection for over-current
or short-circuit should be provided in the input utility.

 Battery

Strictly follow the principle of “same voltage, same type” when

paralleling multi battery packs.

DC breaker or fuse must be used as a protection device between the
external battery pack and the UPS. The spec of protection must be matched
to the UPS specification.

2.2 Unpacking and Inspection

2.2.1 Unpack the package and check the contents. The shipped package
contains:

 1 UPS
 1 user manual

2.2.2 Inspect the appearance of the UPS to see if there is any damage during
transportation. Do not turn on the unit and notify the dealer immediately
if there is any damage or lack of some parts.

- 15 -

2.3 Installation steps for standard model

1) Make sure the wire / circuit breaker / socket are enough for the current

rating of UPS to avoid the hazards of electric shock and fire.

2) Make sure the mains switch in the building is cut off.

3) Make sure the UPS is not be turned on before wiring operation.

4) Turn off all load switches first before connecting the load to the UPS.

5) Make sure the protective earth ground is correct.

6) Connect the loads to the UPS through the outlet sockets.

7) Connect the input power cord of UPS to mains.

2.4 Installation steps for long back up time model

1) Make sure the wire / circuit breaker / socket are enough for the power

rating of UPS to avoid the hazards of electric shock and fire.

2) Make sure the mains switch in the building is cut off.

3) Turn off all load switches first before connecting the load to the UPS.

4) Make sure the protective earth ground is correct.

5) Install the external battery as following:

a) Warning: Make sure the mains input have been cut off.
b) Switch off the battery breaker if there is a battery breaker.
c) Remove the cover of external battery terminal of UPS.
d) Warning: Pay highly attention to the rating battery voltage marked

on the rear panel, the connection with wrong battery voltage may
cause permanent damage of the UPS.

e) Warning: Pay highly attention to the polarity marking on external

battery terminal block, and make sure the correct battery polarity is
connected. Wrong connection may cause permanent damage of the
UPS.

- 16 -

f) Prepare the external battery cable that should be able to carry the

current of >50A, the cross section area should be greater than 5.26
mm2. It is recommended to use 8 AWG wire or thicker for safety
and efficiency. And battery wire color is recommended as following:

＋

＋

＋＋

Red wire Yellow/Green wire Black wire

g) Connect the GND pole of external battery terminal block on the rear

panel of UPS to the earth point of battery pack.
Note: Always connect the earth wire first!

h) Connect the Positive (+) pole of external battery terminal block on

the rear panel of UPS to the Positive polarity of battery pack;

i) Connect the Negative (-) pole of external battery terminal block on

the rear panel of UPS to the Negative polarity of battery pack.

j) Check the wiring and voltage of the battery pack. Make sure the

polarity and voltage is correct, and the wires are fastened.

k) Install the terminal block cover on the rear panel of the UPS.

6) Connect the loads to the UPS through the outlet sockets.

7) Connect the input power cord of UPS to mains

GND

－－－－

2.5 Installation for communication software (optional)

1) Connect the communication cable between UPS and PC. If

the port is RS232, please lock the secure screw both on UPS
and PC after connection. If the port is USB, it has Plug and
Play function.

2) Please refer to the guide manual of software or contact the

service center for installation and operation of management
(monitoring) software.

- 17 -

3. Operation

3.1 Operation Safety Instructions

You must read the following safety instructions
before operation!

 Operation personnel

Laymen can operate this product.

 Operation warning

Do not disconnect the earth conducting wire on the UPS or the
building wiring terminals in any time since this would cancel the protective
earth of the UPS system and all connected loads.

Do not try to disassemble the original part of the UPS before turn off
and disconnect it from the mains power & external battery.

The UPS output socket may be electrically lived even if the UPS
system is not connected to the mains power source.

Do not make any liquid and foreign objects enter the UPS.

Turn off the mains input switch and external battery switch

immediately at any accident of electric shock and fire related to the UPS.

- 18 -

3.2 Start the UPS with mains (AC source)

1) If the UPS is a long back up time model, with external battery banks, please
switch on the battery breaker first;

2) If the wiring is correct, turn on the mains breaker in your building. Then
the power supply inside the UPS will be started automatically, the fans
will run, and the panel will display with bypass mode.

Note 1: If the UPS have been set to enable the bypass output, the output
socket will have the voltage directly from mains after you turn on the
input breaker.

Note 2: In bypass mode, the load is not protected. You should go on to
the next step to turn on the UPS for protecting your load.

3) Press the button of the UPS front panel continuously for more than 2
seconds. The buzzer will beep once, and all the LEDs will be lightened,
and then black out one by one. After a few seconds of self-diagnoses,
the UPS will be turned on to the normal mode (line mode) and output the
spec voltage.

4) After the UPS is turned on to line mode normally, the Inverter LED will be
on, the Bypass/Battery LED will be off. The Load/Battery level LEDs will
be lightened according to the load capacity. There is no beep of buzzer.

Note: If the UPS is shutdown in battery mode automatically, when the mains
power returned to the input, the UPS will start up and switch to line mode
automatically.

3.3 Start the UPS with battery (DC source) only

This UPS can be started with DC source (battery) without AC source.

1) If the UPS is a long back up time model with external battery banks, please
switch on the battery breaker first.

2) Press the button of the UPS front panel continuously for more than 2
seconds. The buzzer will beep once, and all the LEDs will be lightened,
and then black out one by one. After a few seconds of self-diagnoses,

- 19 -

the UPS will be turned on to the battery mode and output the spec
voltage.

3) After the UPS is turned on to battery mode normally, both the Inverter LED
and Bypass/Battery LED will be on. The Load/Battery level LEDs will be
lightened according to the battery capacity. The buzzer will beep according
to the battery level.

3.4 Connect loads to UPS

After the UPS is turned on, you can switch on the loads.

1) It is recommended to switch on the load one by one. The Load/Battery
level LED will indicate the load capacity in line mode.

2) If it is necessary to connect the inductance load such as a printer to the
UPS, the start-up power should be considered for calculating the
capacity of the UPS, because the power consumption is too big when
this kind of load is started.

3) If the UPS is overloaded, all the load level indication LEDs will flash and
the buzzer will beep twice every second for alarming.

4) If the UPS is overloaded, some loads must be switched off or decreased
immediately. It is recommend that the total loads connected to the UPS
had better be less than 80% of its nominal power capacity to prevent the
overload happen at the transient time, and it will make your system more
safe.

5) If the overload time is over spec in line mode, the UPS will transfer to
bypass, after the overload disappears, it will return to line mode. If the
overload time is over spec in battery mode, the UPS will cut off the
output and then shutdown according battery level.

- 20 -

3.5 Charge the batteries

1) After the UPS is connected to normal mains, the charger will work and
charge the batteries automatically in bypass mode or line mode.

2) Suggest charging the batteries for 10 hours before use. Otherwise the
backup time may be less than the standard value.

3.6 Discharge the batteries

1) When the UPS is in battery mode, the buzzer will beep according to
different battery level. If the battery voltage drops to the alarming level, the
buzzer will beep hurry (once every sec) to remind the user that the battery
is low level and the UPS will be shutdown automatically soon. The user
could switch off some non-critical loads to avoid the shutdown alarming
and prolong the backup time. If have no more load to be switched off at
that time, you have to shutdown all loads as soon as possible to protect
the loads or save data. Otherwise there is the risk of data loss or load
failure.

2) In battery mode if the user don’t like the buzzer noise, the beep could be
muted by short-press the button.

3) The backup time of the long backup time model is dependent on the
external battery capacity except the load capacity mainly.

4) The backup time may vary from different environment temperature and

load type.

3.7 Test the batteries

1) If you need to check the battery level or aging status when the UPS is
running on normal mode (line mode), you could short-press the button to
let the UPS transfer to battery test mode.

2) To make the system more reliable, the UPS will perform the battery test

- 21 -

automatically periodically. The default period is once per week.

3) The battery test could be performed by the command from monitoring
software through the communication port.

4) If the UPS enter the battery test mode, the display and buzzer indication
will be same as the battery mode except that the Bypass/Battery LED is
flashing. So you can check the battery level at this mode.

3.8 Turn off the UPS with mains (AC source)

1) Firstly turn off the UPS (inverter) to bypass mode, please press the button

continuously for more than 2 seconds.

2) After you press the button, the buzzer will beep once. All the LEDs will be
lightened, and then black out one by one. Then the panel will display the
bypass mode.

Note 1: If the UPS have been set to enable the bypass output, the output
socket will have voltage from mains directly after you turn off the UPS
(inverter) to bypass mode.

Note 2: Because there is risk of power loss for the loads if you turn off
the UPS to bypass mode, please make sure the loads are prepared for
your operation.

3) If you want to turn off the output of UPS and shut down the UPS
completely, you have to cut off the mains input of UPS.

Note: please make sure all the loads are prepared or turned off for your
operation before you shutdown the UPS system.

4) After you cut off the mains input of UPS to shut down, all the LEDs will be
lightened, and then black out one by one. Finally all the LEDs will be
lightened to indicate the UPS is saving data to the memory. After the
saving process, the UPS will be shutdown completely.

- 22 -

3.9 Turn off the UPS with battery (DC) only

1) To turn off the UPS in battery mode, please press the button
continuously for more than 2 seconds.

2) After you press the button, the buzzer will beep once. All the LEDs will be
lightened, and then black out one by one. Finally all the LEDs will be
lightened to indicate the UPS is saving data to the memory. After the
saving process, the UPS will be shutdown completely.

Note: please make sure all the loads are prepared or turned off for your
operation before you shutdown the UPS system.

3.10 Mute the buzzer

1) To mute the buzzer, please short-press the button. If you short-press it
again after the buzzer muted, the beep will be returned.

2) It is not anytime the buzzer can be muted. If it is in warning/battery­low/overload, the buzzer can’t be muted unless the trouble is solved.

3) If it is in fault mode, short-press the button could transfer the continuous
beep to once-every-second.

3.11 Operation in warning status

1) In case the Fault/Warning LED is flashing and the buzzer is beeping
once every second, it shows that the UPS system have some troubles,
please check the troubleshooting table in chapter 4 to find out what
happen to the UPS.

2) If the warning happens, the UPS will continue work in the original mode,

the operation will not be interrupted. If the error is corrected, the warning
alarm will stop.

- 23 -

3.12 Operation in fault mode

1) In case the Fault/Warning LED is lightened constantly and the buzzer
beep continuously, it shows that there is must a fatal error happen to the
UPS and it is operating in abnormal mode.

2) If fault happens, please notes and record what the display shows, the
display information is very important for the trouble shooing. Please refer
to the troubleshooting table in chapter 4 for detail.

3) Please check your loads, wiring, ventilation, mains, battery and so on
after the fault happens. Don’t try to turn on the UPS again before find out
the reason. If the trouble can’t be shoot, please contact the distributor or
service people.

4) In the emergency case, please cut off the connection from mains /

external battery / output immediately to avoid more risk or danger.

- 24 -

3.13 Indication summary in normal operation

Operatin

g mode

Line

mode

Bypass

mode

Battery

mode

Battery

test mode

Load
level

0~50%
50~75%
75~100%
>100%

No output

0~50%
50~75%
75~100%
>100%
0~100% 0~25%
0~100% 25~50%
0~100% 50~75%
0~100% 75~100%
>100%
0~100% 0~25%
0~100% 25~50%
0~100% 50~75%
0~100% 75~100%
>100%

Battery

level

LED

1 2 3 4 5 6

●

● ●

● ● ● ●
★ ★ ★ ●

●

●

● ●

● ● ●
★ ★ ★
★

●

● ●

● ● ● ● ●
□ □ □ ● ●
★

●

● ●

● ● ● ● ★
□ □ □ ● ★

None

●
None

●
None
Every 0.5 sec

☆

*

★
★
★
★

● ●

● ●

● ●

● ★

● ★

● ★

Buzzer beep

once

Every 2 min

Every 2 min
Every 2 min
Every 2 min
Every 0.5 sec
Every sec
Every 4 sec
Every 4 sec
Every 4 sec
Every 0.5 sec
Every sec
Every 4 sec
Every 4 sec
Every 4 sec
Every 0.5 sec

●: Lightened constantly ☆: Flash once every 4 seconds.
★: Flash once every second □: Depended on the original display

*Note: In this case, it indicates there is no output in bypass mode. The causes
may be that the mains input is out of range or the output is set to disable in bypass
mode. Check the mains input, check the bypass output setting, or turn on the
UPS.

- 25 -

4. Maintenance

4.1 Maintenance Safety Instructions

You must read the following safety instructions
before maintenance!

 Maintenance Personnel

This product must be maintained only by qualified
professional personnel accord to safety instructions!

 Risk of electric shock

No matter the UPS is connected to the utility power or not, the
output may have electricity. The parts (battery, capacitor) inside the unit may
still have hazardous voltage after turning off the UPS.

Make sure to disconnect the batteries before carrying out any kind of

maintenance or repair. In this product, the battery is dangerous.

Verify that no voltage between the battery terminals and the ground
is present before maintenance or repair. In this product, the battery circuit is
not isolated from the input voltage. Hazardous voltages may occur between
the battery terminals and the ground.

Verify that no hazardous voltage exists in the energy storage

capacitor before maintenance or repair.

- 26 -

Remove all jewellery, wristwatches, rings and other metal personal
goods before maintenance or repair.

Only use tools with insulated grips and handles when maintaining or
repairing.

 Battery

Only qualified personnel can replace the batteries!

Do not short the positive and negative of the battery electrode.
Batteries have a high short-circuit current and may cause a risk of serious
shock or fire.

When changing batteries, replace with the same quantity and the
same type of batteries.

Do not attempt to dispose of batteries by burning them. It could
cause explosion. The batteries must be rightly deposed according to local
regulation.

Do not open or destroy batteries. Effluent electrolyte can cause
injury to the skin and eyes. It may be toxic.

 Fuse

Please replace the fuse only by a fuse of the same type and of the

same amperage in order to avoid fire hazards.

- 27 -

4.2 Typical Trouble Shooting

(1) Trouble shooting according to warning indication.

LED

1-3 4 5 6

□ ★ □ ★

□ □ □ ★

□ ★ □ ☆

□ □ □ ☆

□: Depended on the original display ☆: Flash every 4 seconds

Possible cause Action

Fan abnormal, or
internal temperature is
too high

I/P fuse open

Battery low abnormally
or battery not connected
(line mode), or battery
discharged over 14
hours

Battery over voltage, or
charger failed

Check the fans. Check the loads.

Check the ventilation, ambient

temperature.

Check the I/P fuse and related

power component.

Check the battery. If the UPS is

a long back up model, check

whether the external battery

protection (breaker of fuse) is

open. If the battery is damaged

or aged, replace the battery.

Check the charger output,

battery input.

★: Flash every second

Note 1: when the UPS warning, the red Fault/Warning LED will flash, and the

buzzer will beep once every second.

Note 2: When the UPS warning, the UPS is still working on the original mode

with the original display except the inverter LED maybe flash.

Note 3: If the warning can’t be shoot, please contact the distributor or service

center.

- 28 -

(2) Trouble shooting according to fault indication

LED

1 2 3 4 5 6

●

● ●

●

●

●

●

Possible cause Action

Output short

●

circuit

Internal fault

●

(inverter failed)

Internal fault
(inverter relay

●
short)

Overload

●

Internal over

●

temperature

Remove all the loads. Turn off the
UPS. Check whether the output of
UPS and loads is short circuit.
Make sure the short circuit is
removed, and the UPS has no
internal faults before turning on
again.

Contact the distributor or service
center.

Contact the distributor or service
center.

Check the loads and remove
some non-critical loads.

Check whether some loads are
failed.

Check whether the UPS is
overloaded, the air vents are
blocked, and the ambient

temperature is over 40℃.
If the overload or block is

removed, please make the UPS
cool down for 10 minutes before
turning on again.

It is not recommended the UPS is
operated at the ambient

temperature of over 40℃.

● ●

● ● ●

●: Lightened constantly

Internal fault
(bus voltage

●
fault)

Other internal

●

fault

Contact the distributor or service
center.

Contact the distributor or service
center.

- 29 -

Note 1: when the UPS failed, the red Fault/Warning LED will be lightened

constantly, and the buzzer will beep continuously.

Note 2: When the UPS is fault, it will stop the power conversion of mains or

battery, the original Load/Battery level LED will code the fault cause.

Note 3: If the fault can’t be shoot, please contact the distributor or service

center.

(3) Trouble shooting in else cases.

Problem Possible cause Action

Battery discharging
time diminishes

The UPS cannot
power on after
pressing the button

Battery not yet been fully
charged.

UPS overloaded.

Battery aged. Replace the batteries.

Charger failed

The button is pressed too
briefly.

Battery is not connected or
battery voltage is too low, or
Charger failed.

UPS fault.

Keep UPS connected to
utility power persistently for
more than 10 hours to
recharge the batteries.

Check the loads and
remove some non-critical
loads.

Check the charger. Contact
the distributor or service
center.

Press the button
continuously for more than
2 seconds.

Check the charger and
battery.

Contact the distributor or
service center.

- 30 -

4.3 Battery Maintenance

1) The battery used for standard models are valve regulated sealed
lead-acid maintenance free battery. It should be charged regularly in
order to maximize the expected life of the battery. When being
connected to the utility power, whether the UPS is turned on or not, the
UPS keeps charging the batteries and also offers the protective
function of overcharging and over-discharging.

2) The UPS should be charged once every 4 to 6 months if it has not been
used for a long time.

3) In the regions of hot climates, the battery should be charged/ discharged every
2 months. The charging time should be >12 hours.

4) In normal conditions, the battery life lasts 3 to 5 years. If the battery is
found in bad condition, earlier replacement should be made.

5) Do not replace the battery individually. All batteries should be replaced
at the same time following the instructions of the supplier.

4.4 Contact the service center

If contact the service center for trouble shooting, please provide the
information as following:

1) Model name of product.

2) Serial number of product.

3) The date when the problem found.

4) LED display status.

5) Buzzer alarm status.

6) Mains power condition

7) Load type and capacity.

8) Environment temperature, ventilation status.

9) The information (battery capacity, quantity) of the external battery pack

if the UPS is long back up model.

10) Other information for complete description of the problem.

- 31 -

5. Transport and Storage

5.1 Please transport the UPS only in the original packaging.

5.2 The UPS must be stored in the room where it is ventilated
and dry.

- 32 -