Vertiv NetSure 700NVBA User manual

NetSure™
+24 VDC Power System
User Manual (Section 6013), Revision G
Specification Number: 581126000
Model Number: 700NVBA

Vertiv |+24 VDC Power System User Manual (Section 6013)|Rev. G
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The information contained in this document is subject to change without
notice and may not be suitable for all applications. While every precaution
has been taken to ensure the accuracy and completeness of this
document, Vertiv Group Corporation assumes no responsibility and
disclaims all liability for damages resulting from use of this information or
for any errors or omissions. Refer to other local practices or building codes
as applicable for the correct methods, tools, and materials to be used in
performing procedures not specifically described in this document.
This document may contain confidential and/or proprietary information of
Vertiv Group Corporation, and its receipt or possession does not convey
any right to reproduce, disclose its contents, or to manufacture or sell
anything that it may describe. Reproduction, disclosure, or use without
specific authorization from Vertiv Group Corporation is strictly prohibited.
Vertiv and the Vertiv logo are trademarks or registered trademarks of
Vertiv Co. All other names and logos referred to are trade names,
trademarks or registered trademarks of their respective owners.
© 2018 Vertiv Co. All rights reserved.

Vertiv |+24 VDC Power System User Manual (Section 6013)|Rev. G
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TABLE OF CONTENTS
Admonishments Used in this Document............................................................8
Important Safety Instructions ..............................................................................9
Safety Admonishments Definitions.....................................................................................................9
General Safety ..........................................................................................................................................................9
Voltages..........................................................................................................................................................................9
AC Input Voltages........................................................................................................................................................9
DC Output and Battery Voltages ..................................................................................................................9
Battery ............................................................................................................................................................................10
Personal Protective Equipment (PPE)............................................................................................11
Hazardous Voltage.............................................................................................................................................11
Handling Equipment Containing Static Sensitive Components............................11
Maintenance and Replacement Procedures.............................................................................11
Static Warning......................................................................................................... 12
FCC Information...................................................................................................... 13
System Overview.................................................................................................... 15
Preface...........................................................................................................................................................................15
System Description ...........................................................................................................................................15
Navigating the MCA .............................................................................................. 17
MCA Messages.....................................................................................................................................................20
System Operating Procedures............................................................................41
Rectifier Operating Procedures.............................................................................................................41
Converter Operating Procedures........................................................................................................41
WinLink Software User Instructions.................................................................................................41
MCA Ethernet Card WEB Interface User Instructions....................................................41
Battery Temperature Probe Concentrator Module (TXM) .......................................41
Local Controls and Indicators.................................................................................................................41
Location and Identification............................................................................................................................... 41
MCA Display.................................................................................................................................................................. 43
MCA Front Panel Accessed Interface Pad....................................................................................... 43
Low Voltage Disconnect NOR/INH Switch and INH Indicator (if low
voltage disconnect load contactor is furnished) ....................................................................... 46
Manual Battery Disconnect Switch and Indicator (List RB, RC, RD Only)..........47
External Alarms ....................................................................................................................................................48
Starting and Stopping System Operation..................................................................................50
Rectifier Module Normal Starting Procedure................................................................................ 50
Rectifier Module Stopping Procedure (Local) ............................................................................. 50
DC-DC Converter Module Normal Starting Procedure .........................................................51
DC-DC Converter Module Stopping Procedure (Local).......................................................51
Initially Connecting Battery and System Output to the Controlled
Load(s) when Low Voltage Disconnect Load Contactor is Furnished
and Set for Manual Reconnect......................................................................................................................51

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Output Voltage Mode of Operation Selection....................................................................... 52
Placing the System into the Float Mode of Operation..........................................................52
Placing the System into the Test/Equalize Mode of Operation...................................52
Restarting Procedures when Rectifier Module (PCU) is
Automatically or Manually Inhibited, Shut down, or Locked Out .......................58
Rectifier Module High Voltage Shutdown and Lockout......................................................58
Rectifier Module Emergency Shutdown and Fire Alarm Disconnect......................58
Remote On/Off (TR)...............................................................................................................................................58
Restarting a DC-DC Converter Following A High Voltage Shutdown...........58
Low Voltage Disconnect Reconnect Procedure (WHEN FURNISHED
AND SET FOR MANUAL RECONNECT)....................................................................................58
Setting Low Voltage Disconnect (IF FURNISHED) for Manual
Reconnect..................................................................................................................................................................59
Battery Recharge Current Limit Feature ................................................................................... 60
Description......................................................................................................................................................................60
Enabling and Disabling the Feature ........................................................................................................ 61
Battery Charge Current Alarm Feature.........................................................................................61
Measuring Battery Charge/Discharge Current......................................................................61
Using the Alarm Relay Test Feature................................................................................................61
Setting the Alarm Relay Test Feature Time Period................................................................. 61
Performing an Alarm Relay Test.................................................................................................................62
Setting MCA Audible Alarm Cutoff Reset Time Period ...............................................64
Setting Rectifier Module (PCU) / Converter Module Fan Speed
Control (Normal and Variable Speed) Feature.....................................................................65
Description...................................................................................................................................................................... 65
Enabling or Disabling the Rectifier Module / Converter Module
Variable-Speed Fan Control Feature..................................................................................................... 65
Setting the Alternating Display Feature......................................................................................66
Enabling or Disabling the Alternating Display Feature........................................................ 66
Setting the MCA Load Share Alarm Feature..........................................................................66
Enabling or Disabling the 'Load Share Alarm' Feature..........................................................67
Setting the MCA Emergency Stop Feature..............................................................................67
Enabling or Disabling the 'MCA Emergency Stop' Feature...............................................67
Setting the MCA Remote High Voltage Shutdown Feature....................................68
Enabling or Disabling the ' Remote High Voltage Shutdown ' Feature................ 68
Accessing the MCA via the Interface Option.........................................................................69
Accessing the MCA Remotely via WinLink Software............................................................ 69
Accessing the MCA Remotely via a Web-Browser (if Ethernet Interface
Option furnished)...................................................................................................................................................... 69
Accessing the MCA Remotely via SNMP (if Ethernet Interface Option
with SNMP Interface furnished)................................................................................................................. 69
To Display Remote Access Password...........................................................................................70
To Move Back to the Beginning of the MCA Logic Tree...........................................70
To View Active Alarms..................................................................................................................................70
To View Measurement Parameters................................................................................................... 71

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Viewing System Current Capacity...................................................................................................... 71
Viewing Inventory Items ...............................................................................................................................72
MCA "Power Down" Mode...........................................................................................................................72
MCA System Adjustments...................................................................................73
Adjustment Location and Identification.......................................................................................73
Adjusting Float Output Voltage...........................................................................................................74
Adjusting Test/Equalize Output Voltage ................................................................................... 76
Adjusting High Voltage Shutdown ................................................................................................... 78
Adjusting System Current Limit..........................................................................................................80
Adjusting System High Voltage Alarm 1......................................................................................81
Adjusting System High Voltage Alarm 2 ....................................................................................82
Adjusting System Battery On Discharge Alarm...................................................................83
Adjusting System 50% Battery On Discharge (Very Low Voltage)
Alarm...............................................................................................................................................................................84
Adjusting System Current Alarm........................................................................................................85
Adjusting Subsystem (If Connected) High Voltage Alarm.......................................86
Adjusting Subsystem (If Connected) Low Voltage Alarm........................................ 87
Adjusting Subsystem (If Connected) Current Alarm .....................................................88
Adjusting Low Voltage Disconnect (If Installed) "Disconnect" Value............89
Adjusting the Reconnect Value for All Low Voltage Disconnect
Circuits Installed...................................................................................................................................................91
Calibrating System Output Voltage Reading .........................................................................92
Calibrating Subsystem (If Connected) Output Voltage Reading.......................93
Returning System and Subsystem Output Voltage Reading
Calibrations to their Default Values.................................................................................................94
Calibrating Battery Charge Digital Temperature Compensation
Slope................................................................................................................................................................................95
Calibrating Battery Charge Digital Temperature Compensation
Maximum Voltage..............................................................................................................................................96
Calibrating Battery Charge Digital Temperature Compensation
Minimum Voltage ...............................................................................................................................................97
Calibrating Battery Charge Temperature Compensation Source .....................98
Adjusting Battery Ambient High Temperature Alarm (if Battery
Charge Digital Temperature Compensation Probe is installed) .........................99
Adjusting Battery Ambient Low Temperature Alarm (if Battery
Charge Digital Temperature Compensation Probe is installed) ......................100
Enabling, Disabling, and Adjusting the Battery Recharge Current
Limit Setting ..........................................................................................................................................................101
Setting the "Battery Charge Current Alarm" Value........................................................ 102
Manually Initiated Timed Test/Equalize Feature ............................................................ 103
Automatic Test/Equalize Feature................................................................................................... 103
Alarm Relay Test Feature........................................................................................................................ 103
MCA Audible Alarm Cutoff Reset Time Period ................................................................. 103
Rectifier Module / Converter Module Fan Speed Control Feature................ 103
Alternating Display Feature .................................................................................................................. 103

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MCA Load Share Alarm Feature ...................................................................................................... 103
MCA Emergency Stop Feature.......................................................................................................... 103
MCA Remote High Voltage Shutdown Feature................................................................ 103
System Maintenance .......................................................................................... 104
Admonishments................................................................................................................................................104
General Safety............................................................................................................................................................104
Voltages...........................................................................................................................................................................104
System Maintenance Procedures................................................................................................... 105
Adding a Rectifier or DC-DC Converter Module to an Existing Shelf ..........118
Adding a Module Mounting Shelf to the Power System.......................................... 120
Installing LVD Contactor Bypass Kits P/NS 514910 and 514912 ......................125
Installing Kit Part No. 514910........................................................................................................................125
Installing Kit Part No. 514912........................................................................................................................127
System Troubleshooting and Repair...............................................................129
Contact Information.......................................................................................................................................129
Admonishments.................................................................................................................................................129
General Safety............................................................................................................................................................ 129
Voltages........................................................................................................................................................................... 129
Circuit Cards................................................................................................................................................................130
Rectifier Module Troubleshooting Procedures ................................................................. 130
Converter Module Troubleshooting Procedures............................................................. 130
Troubleshooting Information.................................................................................................................131
General............................................................................................................................................................................... 131
Adjustments.................................................................................................................................................................. 131
MCA Messages.......................................................................................................................................................... 131
Additional MCA Messages..............................................................................................................................132
Bypass Circuit Card Requirement...........................................................................................................132
Updating the Inventory after Changes to the System Have Been Made......... 133
Replacement Information.........................................................................................................................134
Replacement Assemblies................................................................................................................................ 134
Replacement Cables............................................................................................................................................ 134
Replacement Procedures.........................................................................................................................134
Replacing a Rectifier Module (PCU).................................................................................................... 134
Replacing a Converter Module.................................................................................................................. 134
MCA Replacement................................................................................................................................................. 134
Rectifier Shelf Interface Circuit Card Replacement...............................................................156
Quad Low Voltage Disconnect Circuit Card Replacement............................................160
Quad Shunt POD Circuit Card Replacement............................................................................... 163
Alarm Termination/Audible Alarm Circuit Card Replacement...................................166
Interconnect/LVD Inhibit Circuit Card Replacement..........................................................169
List RD and RE Shunt POD Circuit Card Replacement......................................................173
Alarm, Reference, and Control Fuse Replacement .................................................................175
Replacing a TPS/TLS-Type Fuse ........................................................................................................... 178

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Replacing a Bullet Nose Type Fuseholder.....................................................................................180
Replacing a TPH-Type Fuse ........................................................................................................................ 181
Replacing a Bullet Nose Type Circuit Breaker........................................................................... 183
Replacing a Distribution Bus Assembly, All Lists except RA, RB, RC, RD,
and RE ............................................................................................................................................................................... 185
Replacing a List RA, RB Battery Disconnect Contactor...................................................200
Replacing a List RC, RD, RE Battery Disconnect Contactor........................................203
Adding a Battery Charge Digital Temperature Compensation Probe
to a Previously Operated System................................................................................................... 206
Removing a Battery Charge Digital Temperature Compensation
Probe from a Previously Operated System ...........................................................................207

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ADMONISHMENTS USED IN THIS DOCUMENT
DANGER
! Warns of a hazard the reader will be exposed to that will likely result
in death or serious injury if not avoided. (ANSI, OSHA)
WARNING
! Warns of a potential hazard the reader may be exposed to that could
result in
death or serious injury if not avoided. This admonition is not used for situations that pose a
risk only to equipment, software, data, or service. (ANSI)
CAUTION
! Warns of a potential hazard the reader may be exposed to that could
result in minor or moderate injury if not avoided. (ANSI, OSHA) This admonition is not
used for situations that pose a risk only to equipment, data, or service, even if such use
appears to
be permitted in some of the applicable standards. (OSHA)
ALERT
! Alerts the reader to an action that must be avoided in order to protect
equipment, software, data, or service. (ISO)
ALERT
! Alerts the reader to an action that must be performed in order to prevent
equipment damage, software corruption, data loss, or service interruption. (ISO)
FIRE SAFETY
! Informs the reader of fire safety information, reminders, precautions,
or policies, or of the locations of fire
-fighting and fire-safety equipment. (ISO)
SAFETY
! Informs the reader of general safety information, reminders, precautions, or
policies not related to a particular source of hazard or to fire safety. (ISO, ANSI, OSHA)

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IMPORTANT SAFETY INSTRUCTIONS
Safety Admonishments Definitions
Definitions of the safety admonishments used in this document are listed under “Admonishments Used in this
Document” on page 8.
General Safety
DANGER! YOU MUST FOLLOW APPROVED SAFETY PROCEDURES.
Performing the following procedures may expose you to hazards. These procedures should be
performed by qualified technicians familiar with the hazards associated with this type of equipment.
These hazards may include shock, energy, and/or burns. To avoid these hazards:
a) The tasks should be performed in the order indicated.
b) Remove watches, rings, and other metal objects.
c) Prior to contacting any uninsulated surface or termination, use a voltmeter to verify that no voltage
or the expected voltage is present. Check for voltage with both AC and DC voltmeters prior to
making contact.
d) Wear eye protection.
e) Use certified and well maintained insulated tools. Use double insulated tools appropriately rated for
the work to be performed.
Voltages
AC Input Voltages
DANGER! This system operates from AC input voltage capable of producing fatal electrical shock. AC
input power must be completely disconnected from the branch circuits wiring used to provide power to
the system before any AC electrical connections are made. Follow local lockout/tagout procedures to
ensure upstream branch circuit breakers remain de-energized during installation. DO NOT apply AC
input power to the system until all electrical connections have been completed and checked.
DC Output and Battery Voltages
DANGER! This system produces DC power and may have a battery source connected to it. Although
the DC voltage is not hazardously high, the rectifiers and/or battery can deliver large amounts of current.
Exercise extreme caution not to inadvertently contact or have any tool inadvertently contact an output
terminal or battery terminal or exposed wire connected to an output terminal or battery terminal.
NEVER allow a metal object, such as a tool, to contact more than one termination or battery terminal at a
time, or to simultaneously contact a termination or battery terminal and a grounded object. Even a
momentary short circuit can cause sparking, explosion, and injury.
DANGER! Follow local lockout/tagout procedures to ensure DC branch circuit protection devices
remain de-energized during installation at loads, as required.

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Battery
Refer to the battery manufacturer documentation for specific battery safety instructions. The following are
general guidelines.
WARNING! Correct polarity must be observed when connecting battery leads.
WARNING! Special safety precautions are required for procedures involving handling, installing, and
servicing batteries. Observe all battery safety precautions in this manual and in the battery instruction
manual. These precautions should be followed implicitly at all times.
WARNING! A battery can present a risk of electrical shock and high short circuit current. Servicing of
batteries should be performed or supervised only by properly trained and qualified personnel
knowledgeable about batteries and the required precautions.
The following precautions should be observed when working on batteries:
•Remove watches, rings, and other metal objects.
•Eye protection should be worn to prevent injury from accidental electrical arcs.
•Use certified and well maintained insulated tools. Use double insulated tools appropriately rated for
the work to be performed. Ensure that wrenches with more than one working end have only one
end exposed.
•Do not lay tools or metal parts on top of batteries.
•Disconnect charging source prior to connecting or disconnecting battery terminals.
•Risk of explosion if battery is replaced with an incorrect type or if polarity is reversed.
Recommended to replace batteries with the same manufacturer and type, or equivalent.
•Dispose of used batteries according to the instructions provided with the batteries. Do not dispose
of batteries in a fire. They may explode.
•ALWAYS FOLLOW THE BATTERY MANUFACTURER’S RECOMMENDATIONS AND SAFETY
INSTRUCTIONS.
DANGER! This equipment may be used in conjunction with lead-acid batteries. Working near lead-acid
batteries is dangerous!
In addition to the hazard of electric shock, gas produced by batteries can be explosive and sulfuric acid
can cause severe burns.
•Do not open or mutilate batteries. Released electrolyte is harmful to the skin and eyes, and is toxic.
•Batteries contain sulfuric acid.
•Batteries generate explosive gases during normal operation. Systems containing batteries should
never be installed in an airtight room or space. Only install in a ventilated environment.
•Batteries are an energy source that can produce high amounts of electrical current.

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FOR THESE REASONS, IT IS OF CRITICAL IMPORTANCE THAT YOU READ THESE INSTRUCTIONS
AND FOLLOW THEM EXACTLY.
WHEN WORKING WITH LEAD-ACID BATTERIES:
•Follow the recommended PPE requirements per the SDS for the battery to be used.
•If battery acid enters your eye, immediately flush your eye with running cold water for at least 15
minutes. Get medical attention immediately.
•If battery acid contacts skin or clothing, wash immediately with soap and water.
ALERT! Performing maintenance and/or troubleshooting procedures may interrupt power to the loads,
if battery reserve is not sufficient.
Personal Protective Equipment (PPE)
DANGER! ARC FLASH AND SHOCK HAZARD.
Appropriate PPE and tools required when working on this equipment. An appropriate flash protection
boundary analysis should be done determine the “hazard/risk” category, and to select proper PPE.
This product is intended only for installation in a Restricted Access Location.
Only authorized and properly trained personnel should be allowed to install, inspect, operate, or maintain
the equipment.
Do not work on LIVE parts. If required to work or operate live parts, obtain appropriate Energized Work
Permits as required by the local authority, per NFPA 70E “Standard for Electrical Safety in the
Workplace”.
Hazardous Voltage
DANGER! HAZARD OF ELECTRICAL SHOCK.
More than one disconnect may be required to de-energize the system before servicing.
Handling Equipment Containing Static Sensitive Components
ALERT! Installation or removal of equipment containing static sensitive components requires careful
handling. Before handling any equipment containing static sensitive components, read and follow the
instructions contained on the Static Warning Page.
Maintenance and Replacement Procedures
CAUTION! When performing any step in procedures that requires removal or installation of hardware,
use caution to ensure no hardware is dropped and left inside the unit; otherwise service interruption or
equipment damage may occur.
NOTE! When performing any step in procedures that requires removal of existing hardware, retain all
hardware for use in subsequent steps, unless otherwise directed.

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STATIC WARNING
This equipment contains static sensitive components. The warnings listed below must be observed to
prevent damage to these components. Disregarding any of these warnings may result in personal injury
or damage to the equipment.
1. Strictly adhere to the procedures provided in this document.
2. Before touching any equipment containing static sensitive components, discharge all static
electricity from yourself by wearing a wrist strap grounded through a one megohm resistor. Some
wrist straps have a built-in one megohm resistor; no external resistor is necessary. Read and follow
wrist strap manufacturer’s instructions outlining use of a specific wrist strap.
3. Do not touch traces or components on equipment containing static sensitive components. Handle
equipment containing static sensitive components only by the edges that do not have connector
pads.
4. After removing equipment containing static sensitive components, place the equipment only on
conductive or anti-static material such as conductive foam, conductive plastic, or aluminum foil. Do
not use ordinary Styrofoam™or ordinary plastic.
5. Store and ship equipment containing static sensitive components only in static shielding containers.
6. If necessary to repair equipment containing static sensitive components, wear an appropriately
grounded wrist strap, work on a conductive surface, use a grounded soldering iron, and use
grounded test equipment.

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FCC INFORMATION
The MCA Interface Modem Option (if installed) has been granted a registration number by the Federal
Communications Commission, under Part 68 rules and regulations for direct connection to the telephone lines.
In order to comply with these FCC rules, the following instructions must be carefully read and applicable
portions followed completely:
a) Direct connection to the telephone lines may be made only through the standard plug- ended cord
furnished to the utility-installed jack. No connection may be made to party or coin phone lines. Prior to
connecting the device to the telephone lines, you must:
b) Call your telephone company and inform them you have an FCC registered device you desire to connect
to their telephone lines. Give them the number(s) of the line(s) to be used, the make and model of the
device, the FCC registration number and ringer equivalence. This information will be found on the
device or enclosed with instructions as well as the jack suitable for your device.
c) After the telephone company has been advised of the above you may connect your device if the jack is
available, or after the telephone company has made the installation.
d) Repairs may be made only by the manufacturer or his authorized service agency. Unauthorized repairs
void registration and warranty. Contact seller or manufacturer for details of permissible user performed
routine repairs, and where and how to have other than routine repairs.
e) If, through abnormal circumstances, harm to the telephone lines is caused, it should be unplugged until
it can be determined if your device or the telephone line is the source. If your device is the source, it
should not be reconnected until necessary repairs are effected.
f) Should the telephone company notify you that your device is causing harm, the device should be
unplugged. The telephone company will, where practicable, notify you, that temporary discontinuance of
service may be required. However, where prior notice is not practicable, the telephone company may
temporarily discontinue service, if such action is reasonably necessary, in such cases the telephone
company must (A) Promptly notify you of such temporary discontinuance, (B) Afford you the
opportunity to correct the condition and (C) Inform you of your rights to bring a complaint to the FCC
under their rules.
g) The telephone company may make changes in its communications facilities, equipment, operations or
procedures, where such action is reasonably required in the operation of its business and is not
inconsistent with FCC rules. If such changes can be reasonably expected to render any customer’s
devices incompatible with telephone company facilities, or require modification or alteration, or
otherwise materially affect its performance, written notification must be given to the user, to allow
uninterrupted service.
The following information is provided here and on a label attached to the outside of the MCA Interface Modem
Option (if installed).
JACK RINGER EQUIVALENCE FCC REGISTRATION NUMBER
RJ-11
0.2A
B46USA-22429-MM-E

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SYSTEM OVERVIEW
Preface
This document (Section 6013) provides User Instructions for NetSure™ Power System Model
700NVBA
, Spec.
No.
581126000
.
For Installation Instructions, refer to Section 6012 located in the separate INSTALLATION MANUAL and on the
CD (Electronic Documentation Package) furnished with your system.
Refer to SAG581126000 (System Application Guide) for additional information. This document, along with the
complete document set, can be accessed from the CD (Electronic Documentation Package) furnished with
your system.
Refer to PD588705100/PD588705101/PD588705102/PD588705103/PD588705104 (Power Data Sheet) for
Module Mounting Shelf information. This document can be accessed from the CD (Electronic Documentation
Package) furnished with your system.
Refer to UM1R243000 (Rectifier Module User Instructions) for Rectifier Module (PCU) information. This
document can be accessed from the CD (Electronic Documentation Package) furnished with your system.
Refer to UM1C24481500 (Converter Module User Instructions) for Converter Module information. This
document can be accessed from the CD (Electronic Documentation Package) furnished with your system.
For a color MCA Menu Tree, refer to Section 6022. Section 6022 is provided in the separate INSTALLATION
MANUAL and the CD CARRIER MANUAL (it is also provided on the CD).
System Description
A +24V DC @ up to 4000 amperes Power System.
This power system is designed to power a load while charging a negative grounded battery. This power system
is capable of operating in a batteryless installation or off battery for maintenance purposes. The power system
is designed for operation with the negative output grounded.
The NETSURE 700NVBA DC Power System is a complete integrated power system containing rectifiers (PCUs),
converters, intelligent control, metering, monitoring, and distribution. This power system consists of the
following components.
•
Distribution Cabinet
The system always includes a minimum of one Distribution Cabinet, which provides DC distribution
through fuses and/or circuit breakers.
Four different sizes of Distribution Cabinets may be ordered to accept from one (1) to four (4)
Distribution Bus Panel assemblies. A variety of Distribution Bus Panel assemblies are available that
provide combinations of load distribution, battery distribution, low voltage load or battery disconnect,
manual battery disconnect, and dual voltage load distribution for use with -48V converters.. The
Distribution Cabinet is factory mounted in the relay rack specified when ordered.
Most of the distribution panels accept either TPS/TLS-type fuse holders or Bullet Nose-type circuit
breakers. TPH-type fuses and GJ/218-type circuit breakers are also available, in ratings up to 600 amps.

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•
Meter-Control-Alarm (MCA) Assembly
The system contains one MCA. The MCA controls the operation of the Rectifier Modules (PCUs). The
MCA also provides power system control, metering, monitoring, and alarm functions.
•
Module Mounting Assembly
The system contains one or more Module Mounting Shelf Assemblies, each of which houses Rectifier
Modules (PCUs) and optional DC-DC Converter Modules.
•
Rectifier Modules (PCUs)
The system contains Rectifier Modules (PCUs), which provide load power, battery float current, and
battery recharge current during normal operating conditions.
•
Optional DC-DC Converter Modules
Where –48VDC load power is also required, DC-DC Converter Modules are available.

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NAVIGATING THE MCA
Navigating the MCA is an easy process. You just have to remember a few key combinations (as shown in the
following chart).
ALARM CUTOFF
MAJOR MINOR AC TEST
EQ
FUNCTION
SELECT FUNCTION SET
YES
ENTER
NO
DISPLAY

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TASK
KEY OR KEY COMBINATIONS
NOTES
Getting to Home Position
At any level in the MCA menus, pressing
YES
and
NO
simultaneously takes you back to the
beginning of the MCA menu tree.
Moving from One Menu
to Another Menu
You can travel left to right from one menu to
another by pressing
ENTER
. You can also
go back to a specified menu by pressing
ENTER
while the menu's name is being
displayed.
Moving Within a Menu
Press
Up Arrow
to move up the list of
available entries in the active menu. Press
Down Arrow
to move down the list of
available entries in the active menu.
Changing a Value or Setting
Entering the
Adjustment/Change
Setting Mode
Changing the
Value or Setting
Locking the Change
Confirming the Change
Changing a value or setting requires four (4)
steps.
1. With the current value or setting being
displayed, simultaneously press
ENTER
and
ALARM CUTOFF
.
2. To increase the value or change the
setting, press
YES
. To decrease the
value or change the setting, press
NO
.
3. With the correct value or setting being
displayed, press
ENTER
.
4. To accept the change, at the "ARE YOU
SURE?" prompt press
YES
. To reject
the change, at the "ARE YOU SURE?"
prompt press
NO
.
Changing a Control Function
Entering the
Adjustment/Change
Setting Mode
Confirming the Change
Changing a control function requires two (2)
steps.
1. With the control function menu item
being displayed, simultaneously press
ENTER
and
ALARM CUTOFF
.
2. To accept the change, at the "ARE YOU
SURE?" prompt press the
YES
. To
reject the change, at the "ARE YOU
SURE?" prompt press
NO
.
FUNCTION
SET
YES
NO
ENTER
FUNCTION
SET
FUNCTION
SELECT
ALARM
CUTOFF ENTER
FUNCTION
SET
FUNCTION
SET
YES
NO
ENTER
FUNCTION
SET
FUNCTION
SET
YES
NO
ALARM
CUTOFF ENTER
FUNCTION
SET
FUNCTION
SET
YES
NO

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NOTES
Only active alarms are displayed.
Subsystem alarms are not displayed if no subsystem is installed.
Low voltage disconnect alarms are not displayed if no LVDs are installed.
Only installed Rectifier Modules (PCUs) are displayed.
Only installed SYS LOADs are displayed.
Only installed SUB LOADs are displayed.
Only installed LVDs are displayed.
Subsystem entries are not displayed if no subsystem is installed.
Low voltage disconnect entries are not displayed if no LVDs are installed.
The "Adjust LVD" entry is not displayed if no LVDs are installed.
The "CAL SUB" entry is not displayed if no subsystem is installed.
The "RESTORE MFG CAL" entry is displayed only if "CAL SYS" or "CAL SUB" has been changed from its default.

Vertiv |+24 VDC Power System User Manual (Section 6013)|Rev. G
20
MCA Messages
The following chart provides an explanation of each MCA message appearing on the MCA Menu Tree (Section
6022). The MCA Menu Tree is located in the separate INSTALLATION MANUAL and the CD CARRIER
MANUAL. It is also provided on the CD (Electronic Documentation Package) furnished with your system. Note
that each line in the MCA Menu Tree contains a number. This number is referenced in the following chart.
MCA
Menu
Tree
Line No.
(Section
6022)
Message Displayed
Associated
with...
Definition
Can this value
be changed?
0 SYSTEM OK Normal
Display NO ALARMS ARE ACTIVE. No
1
## ALARMS ACTIVE
or
NOT RUNNING YET!
or
...............................
Normal
Display
THERE ARE ACTIVE ALARMS.
## = number of active alarms.
or
No Rectifier Modules (PCUs) are
communicating with the MCA.
or
Display has "timed-out".
No
2 ALARM EMERG STOP Main
Alarm Menu
Displays if a Rectifier Module (PCU)
emergency shutdown or fire alarm
disconnect signal is applied to the
system.
No
3 ALARM LVD ACTIVE Main
Alarm Menu
Displays if any low voltage
disconnect circuit has disconnected. No
4
ALARM SYS 50% BOD
or
ALM VERY LO VOLT
or
ALARM LO VOLTAGE
Main
Alarm Menu
Displays if system voltage decreases
to a preset adjustable value,
indicating that the battery has been
continuously supplying the load and
has discharged to approximately half
its reserve time.
No
5
ALARM SYSTEM BOD
or
ALARM LO FLOAT
Main
Alarm Menu
Displays if system voltage decreases
to a preset adjustable value,
indicating that the battery is
supplying the load and is
discharging.
No
6
ALARM SYSTEM HV1
or
ALARM HIGH FLOAT
Main
Alarm Menu
Displays if system voltage increases
to a preset adjustable value. No
7
ALARM SYSTEM HV2
or
ALARM HI VOLTAGE
Main
Alarm Menu
Displays if system voltage increases
to a preset adjustable value. No