Gamatronic Centric 50 kVA User manual

GAMATRONIC ELECTRONIC INDUSTRIES LTD.
17 Hartom St., PO Box 45029, Jerusalem 91450, Israel
Tel: [phone] Fax: [phone]
Email: [email protected] Website: www.gamatronic.com
2MUM-PPCN
U
UP PS S
S SY YS ST TE EM M
Cat. no. 101SBD6x
U
Us se er r G Gu ui id de e
f
fo or r m mo od de el ls s 5 50 0 k kV VA A - - 2 20 00 0 k kV VA A
Release 0.3, July 2013

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Gamatronic Electronic Industries Ltd.
Har Hotzvim Industrial Park
17 Hartom St., PO Box 45029, Jerusalem 91450 Israel
Tel: [phone] Fax: [phone]
Email: [email protected] Website: www.gamatronic.com
The equipment described in this document is not intended to be used in connection with any
application requiring fail-safe performance, unless the application design includes appropriate
redundancy. This exclusion includes, but is not limited to, the direct operation of any life support
system or any other system whose failure could lead to serious injury, death, environmental damage or
mass destruction.
Copyright 2013 by Gamatronic Electronic Industries Ltd. All rights reserved worldwide.
Any representations in this document concerning the performance of Gamatronic's product(s) are for informational purposes only and are
not warranties of future performance, either express or implied. Gamatronic's standard limited Warranty, which accompanies its sales
contract or order confirmation form, is the only warranty offered by Gamatronic Electronic Industries Ltd. in relation thereto.
Gamatronic Electronic Industries Ltd. ("Gamatronic") warrants the products it manufactures to be free from defect for a period of one
calendar year from the date of invoice, including the date of invoice. Gamatronic's liability is limited to repairing or replacing any defective
parts in the equipment under warranty. Gamatronic reserves the right to determine whether the repair work shall be performed at
Gamatronic's factory, at the customer's premises, or at an alternate site. The customer must obtain authorization from Gamatronic before
returning any parts or equipment to Gamatronic for repair or replacement. Any items returned to Gamatronic must be sent freight prepaid.
Gamatronic is not responsible for any damage to the product due to unauthorized repair work, misuse or abuse of the product, or force
majeure. If the product is delivered without batteries, Gamatronic is not responsible for any damage or malfunction due to incorrect wiring
of the batteries.
Gamatronic is not liable for and the Purchaser waives any right of action it has or may have against Gamatronic for any consequential or
special damages arising out of any breach of warranty, and for any damages that the Purchaser may claim for damage to any property or
injury or death to any person arising out of its purchase or the use, operation or maintenance of the subject product.
This warranty includes parts and labor; however, Gamatronic shall not be responsible for any labor subcontracted or performed by the
Purchaser to prepare the warranted item for return to Gamatronic or Gamatronic's agent.
The information contained in this document is proprietary and is subject to all relevant copyright, patent and other laws protecting
intellectual property, as well as any specific agreement protecting Gamatronic's rights in the aforesaid information. Neither this document
nor the information contained herein may be published, reproduced or disclosed to third parties, in whole or in part, without the express,
prior, written permission of Gamatronic. In addition, any use of this document or the information contained herein for any purposes other
than those for which it was disclosed is strictly forbidden.
Gamatronic reserves the right, without prior notice or liability, to make changes in equipment design or specifications.
Information supplied by Gamatronic is believed to be accurate and reliable. However, no responsibility is assumed by Gamatronic for the
use thereof nor for the rights of third parties which may be affected in any way by the use thereof.
This document may contain flaws, omissions or typesetting errors; no warranty is granted nor liability assumed in relation thereto unless
specifically undertaken in Gamatronic Electronic Industries Ltd. standard limited Warranty. Information contained herein is periodically
updated and changes will be incorporated into subsequent editions. If you have encountered an error, please notify Gamatronic Electronic
Industries Ltd. All specifications are subject to change without prior notice.

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TABLE OF CONTENTS
1. INTRODUCTION ..................................................................................................................1
1.1 LCD Control Panel............................................................................................................3
1.2 System controller .............................................................................................................4
1.3 UPS module (25 kVA / 25 kW)..........................................................................................4
1.4 Static switch module........................................................................................................4
1.5 Battery ...............................................................................................................................4
1.6 Emergency Power Off – EPO (manual) ..........................................................................5
1.6.1 EPO indication........................................................................................................5
1.6.2 Battery trip coil........................................................................................................5
2. OPERATING MODES ...........................................................................................................6
2.1 Normal operation..............................................................................................................6
2.2 Battery operation..............................................................................................................6
2.3 Bypass operation..............................................................................................................6
3. USER INTERFACE...............................................................................................................7
3.1 Control panel.....................................................................................................................7
3.1.1 Calibrating the touch screen...................................................................................8
3.2 Alarm Off button...............................................................................................................8
3.3 CPU On/Off button............................................................................................................8
3.4 USB1 and USB2 connectors............................................................................................8
4. CENTRIC CONTROL SYSTEM...............................................................................................9
4.1 The main screen (main menu).........................................................................................9
4.2 Main Menu highlights.....................................................................................................11
4.2.1 Setup ....................................................................................................................11
4.2.1.1 Time................................................................................................................... 11
4.2.1.2 Dry contacts....................................................................................................... 11
4.2.2 Operation..............................................................................................................12
4.2.2.1 Turning the UPS on ........................................................................................... 12
4.2.2.2 Turning the UPS off ........................................................................................... 13
4.2.3 Status....................................................................................................................14
4.2.4 Profile....................................................................................................................15
4.2.5 Log........................................................................................................................15
4.2.6 Time......................................................................................................................15
4.2.7 Help ......................................................................................................................15
4.3 Operating the system.....................................................................................................16
4.3.1 Turning the UPS ON.............................................................................................16
4.3.2 Turning the UPS OFF...........................................................................................16
4.3.3 Transferring the load to bypass............................................................................16
4.3.4 Transferring the load to the inverter .....................................................................16
5. CENTRIC START-UP..........................................................................................................17
5.1 Normal (not first-time) start-up .....................................................................................17
5.2 Centric total shutdown (no ac output)..........................................................................18
6. CENTRIC MENU FUNCTIONS IN DETAIL...............................................................................19
6.1 SETUP menu...................................................................................................................20
6.1.1 Setup > SYSTEM .................................................................................................21
6.1.1.1 Setup > System > NOMINAL SETTINGS.......................................................... 21

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6.1.1.2 Setup > System > NUMBER OF BATTERIES................................................... 22
6.1.1.3 Setup > System > SYSTEM TYPE.................................................................... 22
6.1.1.4 Setup > System > SHUTDOWN and AUTORESTART...................................... 22
6.1.1.5 Setup > System > CONTROLLER..................................................................... 22
6.1.2 Setup > MODULES ..............................................................................................23
6.1.2.1 Setup > Modules > AC INPUT VOLTAGE CALIBRATION ................................ 23
6.1.2.2 Setup > Modules > AC OUTPUT VOLTAGE CALIBRATION ............................ 23
6.1.2.3 Setup > Modules > MODULES INPUT CURRENT CALIBRATION................... 23
6.1.2.4 Setup > Modules > MODULES OUTPUT CURRENT CALIBRATION............... 24
6.1.2.5 Setup > Modules > DC VOLTAGE CALIBRATION............................................ 24
6.1.2.6 Setup > Modules > AC OUTPUT VOLTAGE ADJ. ............................................ 24
6.1.2.7 Setup > Modules > BATTERY VOLTAGE CALIBRATION................................. 24
6.1.2.8 Setup > Modules > SERIAL NUMBER............................................................... 24
6.1.3 Setup > BATTERY................................................................................................25
6.1.3.1 Setup > Battery > BATTERY TEST PARAMETERS.......................................... 25
6.1.3.2 Setup > Battery > BATTERY CURRENT........................................................... 26
6.1.3.3 Setup > Battery > BATTERY CAPACITY IN Ah................................................. 27
6.1.3.4 Setup > Battery > BATTERY TEMPERATURE CONTROL............................... 27
6.1.4 Setup > STATIC SWITCH....................................................................................28
6.1.4.1 Setup > ST.SW. > CALIBRATE BYPASS VOLTAGE........................................ 28
6.1.4.2 Setup > ST.SW. > CALIBRATE INVERTER VOLTAGE.................................... 28
6.1.4.3 Setup > ST.SW. > CALIBRATE OUTPUT VOLTAGE........................................ 28
6.1.4.4 Setup > ST.SW. > CALIBRATE OUTPUT CURRENT....................................... 28
6.1.4.5 Setup > ST.SW. > HIGH-LEVEL SETUP........................................................... 29
6.1.4.6 Setup > ST.SW. > OVERLOAD HYSTERISIS................................................... 29
6.1.5 Setup > ALARMS .................................................................................................31
6.1.5.1 Setup > Alarms > SET ALARM PRIORITIES..................................................... 31
6.1.5.2 Setup > Alarms > ALARM LIMITS ..................................................................... 31
6.1.6 Setup > CONNECTIVITY .....................................................................................33
6.1.6.1 Network configuration options............................................................................ 33
6.1.6.2 SNMP configuration options (optional feature) .................................................. 34
6.1.6.3 Serial communication (optional feature)............................................................. 35
6.1.6.4 Modbus (optional feature).................................................................................. 37
6.1.6.5 Remote shutdown (optional feature).................................................................. 38
6.1.6.6 Email configuration (optional feature) ................................................................ 41
6.1.7 Setup > TIME........................................................................................................45
6.1.7.1 Setup > Time > ADJUST DATE / TIME ............................................................. 45
6.1.7.2 Setup > Time > CHANGE TIME ZONE.............................................................. 45
6.1.7.3 Setup > Time > SET LAST MAINTENANCE DATE........................................... 45
6.1.8 Setup > ASSIGN SITE ID.....................................................................................46
6.1.9 Setup > DRY CONTACTS (optional feature) .......................................................47
6.1.9.1 Setup > Dry contacts > INPUT DRY CONTACTS ............................................. 47
6.1.9.2 Setup > Dry contacts > OUTPUT DRY CONTACTS.......................................... 48
6.1.10 Setup > SAVE & RESTORE...............................................................................52
6.1.10.1 Setup > Save & restore > SAVESETTINGS.................................................... 52
6.1.10.2 Setup > Save & restore > RESTORESETTINGS ............................................ 52
6.1.10.3 Setup > Save & restore >RESTORE FACTORY SETTINGS .......................... 52
6.1.11 Setup > CHANGE PASSWORD.........................................................................53
6.1.12 Setup > CHANGE AUTHORIZATION LEVEL....................................................53
6.1.12.1 Setup > Authorization > SET USER AUTHORIZATION LEVEL ...................... 53
6.1.12.2 Setup > Authorization > ENABLE / DISABLE REMOTE CONTROL ............... 53
6.2 OPERATION ....................................................................................................................54
6.2.1 Operation > SWITCH ON/OFF.............................................................................54
6.2.1.1 Operation > Switch on/off > SYSTEM OFF........................................................ 54
6.2.1.2 Operation > Switch on/off > SYSTEM ON ......................................................... 54
6.2.1.3 Operation > Switch on/off > MODULES OFF..................................................... 54

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6.2.1.4 Operation > Switch on/off > CONTROLLER RESTART .................................... 54
6.2.2 Operation > TRANSFER LOAD............................................................................55
6.2.2.1 Operation > Transfer load > TRANSFER LOAD TO INVERTER....................... 55
6.2.2.2 Operation > Transfer load > TRANSFER LOAD TO BYPASS........................... 55
6.2.3 Operation > BATTERY TEST...............................................................................55
6.3 STATUS ...........................................................................................................................56
6.4 PROFILE ..........................................................................................................................58
6.4.1 Profile > SYSTEM.................................................................................................58
6.4.2 Profile > BATTERY...............................................................................................58
6.4.3 Profile > ST.SW....................................................................................................59
6.4.4 Profile > ALARMS.................................................................................................59
6.4.5 Profile > IDENTIFICATION...................................................................................59
6.5 LOG..................................................................................................................................60
6.5.1 The "Alarms" button on the log detail screen .......................................................63
6.6 CONNECTIVITY...............................................................................................................64
6.7 TIME .................................................................................................................................65
6.8 LANGUAGE .....................................................................................................................66
6.9 HELP ................................................................................................................................66
7. REAR PANEL CONNECTORS..............................................................................................67
8. TROUBLESHOOTING.........................................................................................................69
9. PERIODIC PREVENTIVE MAINTENANCE ..............................................................................71
10. THE BUILT-IN WEB INTERFACE (OPTION) ...........................................................................72
10.1 Preliminaries to use of the Web interface....................................................................72
11. CENTRIC SPECIFICATIONS................................................................................................73
LIST OF FIGURES
Figure 1: Major components of the Centric..........................................................................................2
Figure 2: System control panel, displaying the main menu..................................................................3
Figure 3: System control panel, with current navigation path ..............................................................3
Figure 4: The control panel ..................................................................................................................7
Figure 5: The main screen and its features..........................................................................................9
Figure 6: The Operation submenu .....................................................................................................12
Figure 7: The "Turn off / on" submenu...............................................................................................12
Figure 8: The system requests confirmation......................................................................................13
Figure 9: The "Turn off / on" submenu...............................................................................................13
Figure 10: The system requests confirmation.....................................................................................13
Figure 11: The Status screen.............................................................................................................14
Figure 12: Main menu, UPS off, normal mode...................................................................................17
Figure 13: Centric main menu............................................................................................................19
Figure 14: "Setup" menu ....................................................................................................................20
Figure 15: "Setup > SYSTEM" options...............................................................................................21
Figure 16: "Setup > Modules" options................................................................................................23
Figure 17: "Setup > Battery" options..................................................................................................25
Figure 18: "Setup > Static Switch" options.........................................................................................28
Figure 19: "Setup > Alarms" options ..................................................................................................31
Figure 20: "Setup > Connectivity" options..........................................................................................33
Figure 21: Setup > Connectivity > SNMP configuration options........................................................34
Figure 22: Creating a new community................................................................................................34
Figure 23: Community name accepted ..............................................................................................35
Figure 24: Defining serial communication parameters.......................................................................36
Figure 25: Defining Modbus communication parameters...................................................................37

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Figure 26: Remote shutdown submenu .............................................................................................38
Figure 27: New shutdown destination................................................................................................39
Figure 28: Select the shutdown target and press the arrow...............................................................39
Figure 29: Remote shutdown menu with target destination added....................................................40
Figure 30: Shutdown destination screen............................................................................................40
Figure 31: Example of email message body......................................................................................41
Figure 32: The email configuration menu...........................................................................................42
Figure 33: “Add new recipient” line.....................................................................................................43
Figure 34: New email recipient screen...............................................................................................43
Figure 35: Alarms button on email recipient screen...........................................................................43
Figure 36: Alarm selection screen for email recipient........................................................................44
Figure 37: "Setup > Time" options......................................................................................................45
Figure 38: Assigning a site ID ............................................................................................................46
Figure 39: "Setup > Dry Contacts" option ..........................................................................................47
Figure 40: Defining an input dry contact.............................................................................................48
Figure 41: Example of an output dry contact linked to an alarm........................................................50
Figure 42: "Setup > Save & Restore" options....................................................................................52
Figure 43: "Setup > Password" ..........................................................................................................53
Figure 44: "Setup > Authorization" option..........................................................................................53
Figure 45: The "Operation" option on the main menu........................................................................54
Figure 46: "Main Menu > Status" option.............................................................................................56
Figure 47: The Status Screen ............................................................................................................56
Figure 48: "Main Menu > Profile" options...........................................................................................58
Figure 49: "Main Menu > Log" options...............................................................................................60
Figure 50: Listing of the logfile contents.............................................................................................61
Figure 51: Log record - detailed display.............................................................................................62
Figure 52: "Alarms" display from the log detail screen.......................................................................63
Figure 53: "Main Menu > Connectivity" option...................................................................................64
Figure 54: "Connectivity" display from main menu.............................................................................64
Figure 55: "Main Menu > Time" option...............................................................................................65
Figure 56: The "Time" function on the main menu.............................................................................65
Figure 57: "Main Menu > Language" option.......................................................................................66
Figure 58: "Main Menu > Help" option................................................................................................66
Figure 59: Rear panel with connectors...............................................................................................67
Figure 60: Close-up of connector group 1..........................................................................................68
Figure 61: Close-up of connector group 2..........................................................................................68
Figure 62: Pin usage in D9 alarm connector (in connector group 2) .................................................68
LIST OF TABLES
Table 1: Battery lifetime vs environmental temperature as per Eurobat..............................................4
Table 2: Features of the main screen...................................................................................................9
Table 3: Description of email parameters...........................................................................................42
Table 4: Alarms that can trigger output dry contacts..........................................................................49
Table 5: Key to Figure 47 (the Status screen) ...................................................................................57
Table 6: Log message types..............................................................................................................60
Table 7: Key to Figure 59...................................................................................................................67
Table 8: Technical specifications .......................................................................................................73

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SAFETY CONSIDERATIONS
The Centric UPS system is designed for industrial applications and harsh environments.
Nevertheless the Centric UPS system is a sophisticated power system and should be handled
with appropriate care, following these guidelines.
WARNING!
HIGH TOUCH CURRENT!
EARTH CONNECTION ESSENTIAL
BEFORE CONNECTING SUPPLY.
Do’s
•Read this manual carefully before starting installation and operation of the UPS.
•Review the safety precautions described below to avoid injury to users or damaging
equipment.
•All power connections must be completed by a licensed electrician who is experienced in
wiring this type of equipment, and who is knowledgeable about national and local
electrical codes and regulations. Improper wiring may cause injury to personnel, or
death, or damage to the equipment.
•Pay attention to the warning signs, labels and marks on the unit. A warning sign signals the
presence of a possibly serious, life-threatening condition.
•Keep the surroundings clean, uncluttered and free from excess moisture.
•Allow only qualified technicians to service the UPS. There are no user-serviceable
components. Do not try to repair it yourself!
•Use the UPS only for its intended purpose.
•The batteries should be installed next to the UPS, or as close to it as is practically possible.
The battery drawer contains a series of 12-Volt batteries that provide high voltage
and energy in the UPS body even when the UPS is not connected to the ac input.
Take appropriate precautions during installation, inspection and servicing.
WARNING - RISK OF LETHAL ELECTRIC SHOCK:

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Don’ts
•Do not open the cover of the UPS or the battery cabinets under any circumstances. All UPS
panels and doors should be closed.
•Do not insert any objects through the ventilation holes.
•Do not put objects on the UPS.
•Do not move the UPS while it is operating.
•Do not use the UPS outdoors.
•Do not turn the UPS upside down during transportation.
•Do not connect or disconnect the cable to the battery cabinet before the battery circuit
breaker is turned OFF.
•Do not turn ON the battery circuit breaker when the battery cabinet is disconnected from the
UPS.
•Do not install the UPS next to gas or electrical heaters. A restricted location is recommended
in order to prevent access by unauthorized personnel.
WARNING:RISK OF
SEVERE DAMAGE TO THE UPS!!!
FAILURE TO USE A NEUTRAL CONDUCTOR MAY
CAUSE PERMANENT DAMAGE TO THE SYSTEM.
THIS SYSTEM REQUIRES THE NEUTRAL
LINE FOR OPERATION.
DO NOT CONNECT THIS SYSTEM TO THE AC
POWER SOURCE WITHOUT ANEUTRAL
(NULL)CONDUCTOR!!

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STANDARDS AND CONVENTIONS
•This user manual contains diagrams which include images of the display screen of the UPS.
Unless otherwise indicated, the readings shown in the screen images are only illustrative, and
are not intended to match the readings on a specific system in a particular environment.
•Operation and control of the Centric UPS is accomplished through a touch-sensitive LCD
display screen. In this manual, when explaining how to navigate the control software via the
touch-sensitive screen, the terms "tap", "press", "choose", and "select" may be used
interchangeably to indicate selection of a screen option.

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1. INTRODUCTION
In general, an Uninterruptible Power Supply (UPS) provides backup power for use when the utility
ac electric power mains fail or drop to an unacceptable voltage level. Centric does this and much
more.
Centric
is designed to protect your data and equipment and minimize downtime and other
adverse effects normally incurred by power irregularities and failures.
Voltage surges, spikes and sags are inherent in commercial utility power. Over time, these
irregularities shorten the life of equipment and components. Centric continually eliminates power
irregularities, thus helping to extend the life of your equipment, even through normal use when
the input power is constant and continuous.
Centric
requires very little attention or intervention during normal operation; however, you should
read and understand the procedures described in this manual to ensure trouble-free operation.
Centric has a "true on-line battery" design in accordance with IEC62040-3. It is a "green" power
solution thanks to low input THD, and provides regulated, stable power to your loads. Centric
employs active current balancing between power modules, and delivers overall electrical
efficiency of up to 96 %, up to 98 % in backup mode.

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The Centric is comprised of the following sub-assemblies:
•From one to eight internal UPS modules, each with a maximum output of 25 kVA / 25 kW.
•System controller
•Static switch module
•LCD control panel
200 kVA model
100 kVA model
Figure 1: Major components of the Centric

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1.1 LCD Control Panel
The LCD control panel (Figure 2) is the user's main interface with the Centric. The LCD panel is
touch-sensitive – the user navigates through the system screens by pressing lightly on the
various icons. On all screens other than the main menu screen, the current navigation path is
displayed in the upper-left corner of the screen (Figure 3), enabling you to easily understand
where you are within the control system menus. The extensive capabilities of the user interface
are described in detail in chapter 6 "Centric menu functions in detail".
Figure 2: System control panel, displaying the main menu
Figure 3: System control panel, with current navigation path

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1.2 System controller
The Centric system controller has three purposes:
•Controls and monitors the operation of the Centric according to the user's commands.
•Collects and summarizes data from all sections of the UPS.
•Manages communication with external computers for data transfer and operation.
The Centric can operate without the system controller but with reduced functionality.
1.3 UPS module (25 kVA / 25 kW)
The UPS module is the core of the Centric, which consists of from one to ten identical internal
modules operating in parallel. The number of UPS modules is fixed at the time of manufacture
and depends on the user's capacity requirements.
Each UPS module includes a 3-phase charger with PFC (power factor correction) and a 3-phase
PWM (pulse-width modulation) inverter connected to batteries by a classic dc link.
1.4 Static switch module
The centralized hybrid static switch enables an automatic transfer of the load from the output of
the inverters to an alternate source – the ac mains, for example – when the inverter is unable to
supply sufficient power to the load (for example, in the event of an overload, or an inverter
failure). The static switch transfers high currents at very high speed; a typical transfer time is 3
ms.
1.5 Battery
The Centric battery bank provides backup power to the UPS and its load devices in the event
that the utility ac input fails. The batteries are housed in an external cabinet adjacent to the
Centric. The batteries are charged by the rectifier that supplies both the inverter and the battery
charger.
The battery cabinet should be installed as close to the UPS as is practically possible.
Protect the batteries from moisture, dampness, and foreign substances.
The temperature of the battery's surroundings influences the batteries' useful lifetime.
Table 1: Battery lifetime vs environmental temperature as per Eurobat
ENVIRONMENTAL
TEMPERATURE ACHIEVABLE PERCENTAGE OF BATTERY'S RATED LIFETIME
20 °C 100 %
30 °C 50 %
40 °C 20 %

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1.6 Emergency Power Off – EPO (manual)
An external Emergency Power Off (EPO) switch may be installed on the Centric by the customer.
The EPO switch cuts power to the load in emergency situations. After being switched OFF by the
EPO, the Centric must be restarted manually. Refer to the section "Emergency Power Off" in the
Centric Installation Guide for further information.
1.6.1 EPO indication
Any of the output dry contacts can be assigned to indicate when the EPO switch has been
activated. This dry contact can be used to trigger an external circuit if desired, such as a lamp or
an audible alarm.
Refer to the section "EPO indication" in the Centric Installation Guide for further information.
1.6.2 Battery trip coil
The battery trip coil terminals are intended to be connected to the trip coil of the battery circuit
breaker. If this is done and the EPO switch is activated, the Centric sends a voltage pulse V to
the battery circuit breaker trip coil, causing the battery circuit breaker to turn OFF.
Use of the battery trip coil means that not only will use of the EPO switch cut all ac output from
the UPS, it will also turn off the battery circuit breaker.Refer to the section "Battery trip coil" in the
Centric Installation Guide for further information.

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2. OPERATING MODES
The Centric UPS functions to supply ac electrical power to your load.
The Centric has three possible modes of operation:
•Normal operation.
•Battery operation.
•Bypass operation.
2.1 Normal operation
The UPS is almost always in normal operation mode. The load receives its power from the
inverters that supply stabilized voltage, protected from spikes and irregularities in the ac input.
The ac input system feeds the charger which supplies dc power to the inverter, while concurrently
charging the batteries.
2.2 Battery operation
During battery operation, the load continues to receive power from the inverters, but the dc input
to the inverter is taken from the batteries, instead of from the rectifier.
The batteries are galvanically connected by dc link to the inverter and the charger. Therefore, the
dc voltage to the inverter continues without interruption when the ac input supply drops out; there
is no need for any switching devices to bring the battery on-line, as it is permanently on-line.
The duration of the battery operation is determined by the load demand and the battery capacity.
2.3 Bypass operation
During bypass operation, the load receives power directly from the bypass ac input via the static
switch.
Whenever the inverters cannot provide power to the load, either due to an overload or a short-
circuit in the load, the load is automatically moved to the bypass ac input. The load automatically
returns to the inverter when the problem has been corrected.

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3. USER INTERFACE
This section describes the buttons and indicators used to operate the Centric.
3.1 Control panel
The LCD control panel (Figure 2) is the user's main interface with the Centric. The LCD panel is
touch-sensitive – the user navigates through the system screens by pressing lightly on the
various icons. On all screens other than the main menu screen, the current navigation path is
displayed in the upper-left corner of the screen (Figure 3), enabling you to easily understand
where you are within the control system menus.
The navigation path in the upper-left corner of the screen is also used to navigate backwards – to
return to a previous screen or to the main menu.
The extensive capabilities of the user interface are described in detail in chapter 6 "Centric menu
functions in detail".
Figure 4: The control panel
The LCD control panel is attached to the front of the UPS and is active when the UPS is
connected to ac power and also when the UPS is operating in battery mode.
There is a physical power on/off button on the control panel that controls the power supply to the
screen. If the UPS is connected to ac power or operating in battery mode and the display screen
is blank, ensure that the display unit itself has been powered on.
The display unit is mounted on a holder and can be removed from that holder if necessary. The
angle of the display screen can be adjusted.

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3.1.1 Calibrating the touch screen
It may occasionally be necessary to calibrate the touch-screen, so that the pressure sensitive
spots on the screen accurately overlay the icons. It is recommended to calibrate the touch-screen
the first time you use it. The touch-screen can be recalibrated at any time, if needed.
To calibrate the touch screen, press and hold your finger on any location on the screen
(preferably not on an icon) for 10 seconds and then release your finger. The software then
prompts you to press on four specific locations on the screen, in series. Upon completing this
process, the touch screen has been calibrated.
3.2 Alarm Off button
To the left side of the LCD touch screen are two buttons. The leftmost button is the “Alarm Off”
button. Pressing the “Alarm Off” button silences the alarm that sounds when there is a system
fault. If another fault occurs, the alarm returns to active mode.
Note: The ALARM LED remains lit until the problem is resolved to indicate the continued existence of a
system fault.
3.3 CPU On/Off button
To the left of the LCD touch screen are two buttons. The rightmost of these is the “CPU On/Off”
button. Pressing this button switches the UPS’s main computer (the CPU) off or on. This is for
use only in the rare instance that the LCD touch screen freezes up or the system otherwise
ceases to respond to commands. In such a case, switching the CPU off and then on again may
resolve the problem.
The Centric will continue to operate as normal even when the computer is turned off, although
obviously there will be reduced functionality.
3.4 USB1 and USB2 connectors
To the right of the LCD touch screen are two USB connectors. These are described in section
XX.

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4. CENTRIC CONTROL SYSTEM
The Centric control system provides the user complete control over the UPS and its operating
parameters. This chapter describes basic, most frequently-used functions.
4.1 The main screen (main menu)
The main menu is the user's starting point for most operations. Figure 5 illustrates the main
screen and Table 2 explains the main screen's features.
Figure 5: The main screen and its features
Table 2: Features of the main screen
ITEM DESCRIPTION
1 The operational status (ON/OFF) and current mode
(Normal [inverter] mode / bypass mode / battery mode)
2 Menu options:pressing these icons provide access to the main submenus.
3 Current date and time.
4 UPS soft on/off button:Pressing this icon displays the UPS ON/OFF screen, which
enables the user to turn the UPS on and off.
5 Alarm indicator:When there are active alarms, a yellow triangle is displayed with an
exclamation point inside. When there are no active alarms, this area of the main screen
is blank. Pressing this icon displays the Active Alarm screen.
6 Battery indicator:Indicated the status of the battery: charging or discharging.
Pressing on this icon displays the Battery Status screen.
7, 8, 9 Load indicators:Indicates the approximate load level on each output phase. With no
load, all the vertical bars are white. As load increases, the vertical bars change color,
from left to right.

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On all screens other than the main menu screen, the current navigation path is displayed in the
upper-left corner of the screen (see Figure 3), making it easy to understand where you are
located within the control system menus.
The navigation path in the upper-left corner of the screen is also used to navigate backwards – to
return to a previous screen or to the main menu. Pressing any of the screen icons in the
navigation path moves you to that screen.