
Press to turn on the UPS.
Click to disable alarm buzzer (press during battery mode).
Press long to perform battery life test
Press to turn off the UPS. (UPS will switch to bypass if it is configured)
Click to disable alarm buzzer in bypass mode.
Press to release the UPS from fault mode or EPO status.
Press the Select button to select the settings value one by one
Press to enter settings mode (depending on the UPS Mode)
Click to enter settings item (settings string will flash)
Click to confirm settings
Press to exit Settings mode
Input frequency and
voltage
Indicates the value of input frequency and voltage
Lights on when the input power is at no loss.
LCD Screen
ON Button/
Alarm Silence
OFF-Button Select-Button Enter-Button
Quick Guide
PowerWalker VFI RT HID Series
I. Assembly
The UPS can be assembled in a rack form using rack ears (Rack Mount Kit is not included) or in
tower form using tower holder. The LCD part can be taken out and turned 90 degrees to align
with orientation of the UPS.
Internal batteries are disconnected for transportation. It is necessary to open front panel (2
screws on the side, 1 screw behind the LCD) and connect the two available connectors before
first usage. External batteries are connected in front using third connector.
Details at https://support.powerwalker.com/kb/faq.php?id=83 (faq.powerwalker.com)
II. Display Panel
The LCD uses blue back-light as standard. In case of critical
error the back-light changes to red. Buttons react to:
Click – Press the button for around 1s and
release
Press – Press and hold for more than 3s, release
Press long – Press and hold for more than 10s,
release
III. Description of LCD display function

Output frequency and
voltage
Indicates the value of output frequency and voltage
The UPS has two groups of outlets. The output plug
indicator will light on if there is output power
respectively.
UPS status/user setting
display String
Strings Indicate the UPS status( see Table 4)
Strings Indicate user setting options( see Table 5)
Lights on when the UPS is failure or alarm.
Lights on when the UPS under settings mode.
Battery volume level
display
Indicates the amount of battery volume remaining.
Each battery volume level bar indicates approximately
20% of total battery volume
Indicates the load level of the UPS. Each level bar
indicates approximately 20% of the total UPS output
Power.
~
~
250V 10A
250V 10A
INTELLIGENTSLOT
RS232
LS2AC OUTPUT
LS1AC OUTPUT
~
250V 16A
USB
ACINPUT
DRYIN
EPO
DRYOUT
IV. Rear Panels

Transmit to external device
Receive from external device
Signal common (tied to chassis)
Activated when any warning happens
V. Connection of the UPS
The UPS should be protected with circuit breaker on the
input. Minimum rating should 10A for 1000VA, 12A for
1500VA, 16A for 2000VA and 20A for 3000VA. For output
connection please use original cables and share the load
equally among outlets.
VI. Connecting Battery Packs
Remove front panel, connect the battery via Anderson PP45 connectors. Make sure you
are connecting with correct polarity (red to red, black to black). Make sure the wires are
connected tight. Close front panel. Setup the amount of battery packs in the settings.
VII. Communication Ports
A Local communication with the software can be
established via USB or RS232 connector. Alternatively UPS
can be controlled using dry contacts.
VIII. DB9 Female (RS232) pin description
Dry contacts are not available for VI ERT series.
IX. Dry contact port and EPO
The relay output contact must not be connected to any utility connected circuits.
Reinforced insulation to the utility is required. The relay output contact has a maximum
rating of 30Vac/1A.
The signal input to control UPS On/Off status is the same as one button to control UPS
On/Off status. The relay output can be configured by protocol command:

Activated when the UPS operates on battery
Activated with the “bLOW” alarm
Activated when the UPS has no alarms and no fault.
Activated when the UPS has bypass output.
One second pulse activate, if active, the UPS turns off when UPS is
on inverter; the UPS turns on when UPS is not on inverter. It is the
same as a remote button to control UPS On/Off status.
Enable (001) / Disable (000)
For more information visit our website.
X. Extension Slot
UPS allows extending communication means by extension cards. Please check product
website for list of accessories.
XI. UPS Initial Startup
1. Verify that the internal batteries (behind front panel) and optional battery packs are
connected.
2. Plug the equipment (load), but do not turn it on
3. Plug in the UPS input power cord. The UPS front panel display illuminates and UPS
status display shows “INIT” for initialization and then settles on “STbY”
4. Press and hold the ON/OFF button more than 3 seconds. The UPS status display
changes to “LINE”
5. Configure the UPS (i.e. EBM battery settings)
At initial startup, the UPS sets system frequency according to input line frequency.
XII. User Setting String
Settings should be done in standby (no output) or bypass mode. Load Segments can be
also changed in Line Mode
XIII. [UPS] Normal Operating Mode
UPS works in normal double conversion mode, providing clean and filtered power.
XIV. [CVF] Frequency Converter Mode
When input frequency is within 40 Hz to 70 Hz, the UPS can be set at a constant output
frequency, 50 Hz or 60 Hz. The UPS will still charge battery under this mode. Frequency
Converter requires de-rating of the UPS Power to 70%.
XV. [ECO] Economy Mode
It is also referred to as high efficiency mode. The load is supplied directly from mains via
internal filter when input voltage is within the allowed range. If the input is abnormal,
UPS would switch to battery mode. A transfer time up to 10ms is present during switching
to battery mode.
XVI. Configuring EBM quantity

UPS work at Standby mode (no output)
UPS work in Bypass mode (no backup function!)
UPS work in Battery mode (no AC input)
UPS work in battery life/function test mode
UPS work in converter mode
Site fail, check input connection
Fan fail, check if fan is not blocked
Battery low, recharge or replace batteries
Battery open, check battery circuit connection
Battery fault, replace batteries
Overload, disconnect load
Ambient temperature too high
For following errors contact our technical support: CHGF / TEPH / SHOR / ISFT / bSFT / OVTP /
INVL / INVH / bUSH / bUSL / bUSE / bUSS / HIGH / NTCO
Setting correct EBM (External Battery Module) quantity is critical for reaching the desired
backup time. Only if this value is set correctly, UPS will be able to maximize the battery
usage. The value represents amount of original battery packs fitted with 2 strings of 9Ah
batteries.
XVII. Configuring Load Segment
Load segments are groups of outlets that can be configured through the display. VFI RT
HID models have two configurable load segments. When UPS is turned on (it has
activated output), you can turn off a load segment. If the UPS is turned off (no output),
then a load segment cannot be turned on.
XVIII. Bypass Mode
If the bypass is set to enabled (value = 001), then the UPS would provide output to the
load as long as there is input. Turning off the UPS would essentially switch off the inverter
and supply unfiltered power to the load.
XIX. UPS Status Display String
XX. Indicators and Audible alarm
Alarm can be muted when it is activated, but it will sound in case of low battery, fan
fault, overheat and other major fault.
XXI. Technical Specification

45-55 or 54-66 Hz for Normal Mode
12s @102%-130%; 1.5s @130%-150%; 100ms @ >150%
Recharge Time to
90% after
discharged
0%-95% relative humidity (non-condensing)