Mitsubishi Electric 9900CX SERIES User manual

UNINTERRUPTIBLE POWER SUPPLY SYSTEM
MODEL
9900CX SERIES
OWNER’S / TECHNICAL MANUAL
(Inclusive Parallel Operation System Application)
UNINTERRUPTED Peace of Mind
®
U-ENM00043, REV 0

Preface
Revision
A
04/04
/
2017
4GBA0114

MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
i
TABLE OF CONTENTS
LIST OF TABLES ............................................................................................................... ii
LIST OF FIGURES ............................................................................................................. iii
HOW TO USE THIS MANUAL ........................................................................................... iv
1.0 INTRODUCTION
....................................................................................................... 1-1
1.1 SAFETY PRECAUTION ............................................................................................ 1-2
1.2 GENERAL .................................................................................................................. 1-6
1.3 DEFINITIONS ............................................................................................................ 1-7
1.4 OPERATION OVERVIEW ......................................................................................... 1-8
1.5 SPECIFICATIONS ..................................................................................................... 1-15
2.0 OPERATION CONTROLS AND INDICATORS
....................................................... 2-1
2.1 LED DISPLAY ........................................................................................................... 2-2
2.2 EPO BUTTON ........................................................................................................... 2-2
2.3 LIQUID CRYSTAL DISPLAY ..................................................................................... 2-3
2.4 EXTERNAL SIGNAL TERMINAL BLOCK ................................................................. 2-8
2.5 EXTERNAL COMMUNICATION CONNECTOR ....................................................... 2-15
3.0 INSTALLATION AND OPERATION
......................................................................... 3-1
3.1 TRANSPORTATION AND INSTALLATION .............................................................. 3-1
3.2 INSTALLATION PROCEDURE ................................................................................. 3-1
3.3 PROCEDURE FOR CABLE CONNECTIONS .......................................................... 3-2
3.4 OPERATING PROCEDURES ................................................................................... 3-8
4.0 RESPONSE TO UPS FAILURE
............................................................................... 4-1
5.0 PARTS REPLACEMENT
.......................................................................................... 5-1
6.0 FAULT CODES
......................................................................................................... 6-1
7.0 WARRANTY & OUT OF WARRANTY SERVICE
.................................................... 7-1

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LIST OF TABLES
Table 1.1 UPS Installation Environment ..................................................................... 1-4
Table 1.2 Rating of Bypass Input Circuit Breaker ..................................................... 1-5
Table 1.3 Power Specifications................................................................................... 1-15
Table 1.4 UPS Cabinet Information............................................................................. 1-15
Table 1.5 Detail of Specifications................................................................................ 1-16
Table 1.6 Rating of Contactors, Breakers and Fuses................................................. 1-17
Table 2.1 Selectable Items for Output Contacts ......................................................... 2-11
Table 2.2 Selectable Items for Input Contacts............................................................ 2-14
Table 3.1 How to Transport and Install the System.................................................... 3-1
Table 3.2 List of UPS Weights .................................................................................... 3-1
Table 3.3 Maximum Permitted Fault Current.............................................................. 3-2
Table 3.4 Recommended Cable Sizes........................................................................ 3-4
Table 3.5 Recommended Hardware ........................................................................... 3-4
Table 3.6 Crimp Type Compression Lug .................................................................... 3-5
Table 6.1 Bypass Module Fault Code List .................................................................. 6-2
Table 6.2 UPS Module Fault Code List....................................................................... 6-6

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LIST OF FIGURES
Figure 1.1 Single Line Diagram-
Normal Operation: Load powered by UPS inverter ................................. 1-8
Figure 1.2 Single Line Diagram-
Bypass Operation: Load Fed through static bypass line ......................... 1-10
Figure 1.3 Single Line Diagram-Battery Operation................................................... 1-11
Figure 1.4 UPS Parts Location.................................................................................. 1-13
Figure 2.1 Operation/Display Panel........................................................................... 2-1
Figure 2.2 Main Screen ............................................................................................. 2-3
Figure 2.3(a) Start/Stop Operation................................................................................. 2-4
Figure 2.3(b) Start Operation......................................................................................... 2-4
Figure 2.3(c) Stop Operation......................................................................................... 2-4
Figure 2.4(a) Input Values.............................................................................................. 2-4
Figure 2.4(b) Output Values........................................................................................... 2-4
Figure 2.5 Remote/Local Operation or Date & Time Adjustment Select .................. 2-5
Figure 2.6(a) Log Menu.................................................................................................. 2-5
Figure 2.6(b) Event Log ................................................................................................. 2-5
Figure 2.6(c) Battery Log............................................................................................... 2-5
Figure 2.7(a) Main Screen (Battery Operation) ............................................................. 2-6
Figure 2.7(b) Measurement Screen (Battery Operation)............................................... 2-6
Figure 2.8 Main Screen (Fault Indication)................................................................. 2-7
Figure 2.9 Message Screen ...................................................................................... 2-7
Figure 2.10(a)
External Signal Terminal Block TN21-25 (NEC Class2) ............................ 2-8
Figure 2.10(b)
External Signal Terminal Block TN11-14 (NEC Class2) ............................ 2-9
Figure 2.11 Control Wiring for External Contacts........................................................ 2-10
Figure 2.12 Remote "Start" Contact Connections....................................................... 2-12
Figure 2.13 External Communication Connector........................................................ 2-15
Figure 3.1 UPS Terminal Designation ..................................................................... 3-5
Figure 3.2 Diagram of Input/Output Bus Bars and Terminal Blocks ....................... 3-6
Figure 3.3 Diagram of Power Wire and Control Wire Interconnection between
UPS and Battery ..................................................................................... 3-7

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9900CX SERIES UPS
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HOW TO USE THIS MANUAL
This manual is designed for ease of use, giving the user easy and quick reference to
information.
This manual uses notice icons to draw attention to the user important information regarding the
safe operation and installation of the UPS. The notice icons used in this manual are explained
below, and should be taken into account and adhered to whenever they appear in the text of
this manual.
Warning: A warning notice icon conveys information provided to protect
the user and service personnel against hazards and/or possible equipment
damage.
Caution: A caution notice icon conveys information provided to protect
the user and service personnel against possible equipment damage.
Note: A Note notice icon indicates when the user should make a reference of
information regarding the UPS operation, load status and display status.
Such information is essential if Mitsubishi field service group assistance and
correspondence is required.
Safety Recommendations: If any problems are encountered while following this manual,
Mitsubishi field service group assistance and correspondence is recommended.

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OWNERS / TECHNICAL MANUAL
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1.0 INTRODUCTION
The Mitsubishi Uninterruptible Power Supply System (UPS) is designed to provide many years
of reliable protection from power failure, brown-outs, line noise, and voltage transients. To
ensure optimum performance of the equipment, follow the manufacturer's instructions. This
manual contains descriptions required to operate the UPS. Please read this manual carefully
and retain it for future reference.
This manual contains important instructions for the 9900CX SERIES Uninterruptible Power
Supply System that should be followed during installation and maintenance of the UPS and
batteries.
Lethal voltages exist within the equipment during operation. Observe all
warning and cautions in this manual. Failure to comply may result in serious
injury or death. Obtain qualified service for this equipment as instructed.
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
WARNING 1

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1-2
1.1 SAFETY PRECAUTIONS
In order to maintain safety and perform start-up and maintenance of the UPS system
successfully, certified service personnel familiar with the operation of this equipment must
be involved. The following safety practices should always be followed.
PRECAUTIONS DURING INSTALLATION
CAUTION
Do not block the ventilation ports. The ventilation ports should be arranged so that walls or
ceilings do not block ventilation. (Maintenance spaces described in the catalogue or external
drawings should be followed.)
If a ventilation port is blocked, the internal temperature of the UPS will rise, and consequently,
a fire may be caused due to liquid leakage from batteries, short-circuits, or parts deterioration.
PRECAUTIONS FOR WIRING
CAUTION
Ask professional agents for wiring work. Inappropriate wiring work may cause electric
shocks, injuries, or fire.
PRECAUTIONS TO PROFESSIONAL AGENTS
CAUTION
Use wiring conduit, pits or racks for input/output wiring. Inadvertent wiring may cause
injuries.
Use terminals for connection to the input/output terminals. Inadvertent connection may
cause electric shocks.
Do not drop dust or any other thing from the fan hole.
PRECAUTIONS FOR UPS OR UPS PARTS DISPOSAL
CAUTION
Since the UPS contain special industrial waste, such as capacitors, insulators or batteries,
they cannot be disposed of like other general waste. Please check the disposal guideline of
your district, contact the specialized contractor for disposal.
WARNING 2

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1-3
PRECAUTIONS REGARDING BATTERIES
Before operating the system, carefully read the battery and battery cabinet operating manuals.
CAUTION
Follow the directions below when using the batteries, otherwise liquid leakage, heat evolution,
and explosions may be caused.
a. Do not solder the batteries directly.
b. Do not charge the battery with its negative and positive terminals reversed.
c. Do not use different types or suppliers of batteries, or old and new batteries together.
d. Do not remove or damage the armoring tube of the battery.
e. Do not render a large impact or throw the battery.
f. Use wet clothes for cleaning the battery. Do not use organic solvents such as gasoline and
thinner, or oil. Do not wipe the battery with cloths that contain organic solvents or oil. Keep
the battery away from flexible vinyl materials.
g. Since the electric energy remains in the used batteries, treat them carefully to prevent
sparks and short circuits.
APPLICATION
CAUTION
If the UPS System is to be applied to support equipment that could affect human safety, the
following steps must be adhered to:
1. Consult with Mitsubishi Electric Power Products Inc. UPS Division.
2. Special consideration of the overall back up power system configuration is required so that the
Mitsubishi UPS System is not the sole support required for operation, maintenance and
management of power availability. Other available power sources; for example utility,
emergency power generation or other systems shall also support power availability.
Definition of equipment that could affect human safety:
Life Support Systems (is a system whose failure to perform can be expected to result in
bodily injury or death.)
Essential Public Systems (is a system whose failure to perform can be expected to result
in bodily injury or death and/or property damage.)

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The UPS is to be installed in a controlled environment.
Improper storage and installation environment may deteriorate insulation,
shorten component life and cause malfunctions.
Keep the installation environment per standard described as follows:
Table 1.1 UPS Installation Environment
No. Item Environment standard
1 Installation
Location
Indoors, without vibrations or impact
2 Ambient
temperature Minimum temperature: 32 F(0 C), Maximum temperature: 104 F(40 C) The
average temperature over any 24-hour period must be in the range 41 F (5 C)
to 95 F(35 C).
3 Relative humidity The relative humidity must be held between 5 and 95%. There must be no
condensation due to temperature changes.
4 Altitude This equipment must not be applied at altitude that exceeds 1980m (6500ft)
above sea level.
5 Dust Dust in the room where the UPS is installed must not exceed normal
atmospheric dust levels. In particular, that dust should not include iron particles,
oils or fats, or organic materials such as silicone.
6 Inflammable gas
following
IEC654-4
Part 4
There should be no inflammable/explosive gas.
Hydrogen sulfide (H
2
S) No more than 0.003 PPM
Sulfurous acid gas (SO
2
) No more than 0.01 PPM
Chlorine gas (Cl
2
) No more than 0.002 PPM
Ammonia gas (NH
3
) No more than 1 PPM
Nitrous oxides (NO
x
) No more than 0.05 PPM
Ozone (O
3
) No more than 0.002 PPM
WARNING 3

MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
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This UPS does not include a Bypass input circuit breaker (MCCB) to protect
bypass circuit. The Bypass input circuit breaker (MCCB) is to be field
supplied and installed. Recommended Breaker (MCCB)'s Specifications are
as follows:
Table 1.2 Rating of Bypass Input Circuit Breaker
Capacity (kVA) Bypass Voltage (Vac) Bypass Rating (Aac) Breaker (A)
1050 480 1263 1600
1400 480 1684 2500
1750 480 2105 3000
2100 480 2526 4000
AC input and AC output overcurrent protection and disconnect devices shall be field
supplied and installed. The DC circuit breaker (MCCB) shall be field supplied and
installed. The overcurrent protection device should be installed in the Battery cabinet
and rated as indicated in Table 1.6.
WARNING 4

MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
1-6
1.2 GENERAL
The Mitsubishi 9900CX SERIES UPS is designed to provide continuous and clean electrical
power to a critical load. Additionally the UPS monitors power conditions affecting the load. In
the event of an input power failure, the UPS will supply power to the critical load for the specified
battery time.
If the input power is not restored promptly, backup power from the UPS battery permits the
orderly shutdown of equipment supported by the UPS. The UPS is simple to start-up, operate
and maintain.
The 9900CX SERIES UPS is available in 1050, 1400, 1750, and 2100 kVA. Specifications are
shown in Section 1.5.
This manual provides an overview of the 9900CX SERIES components and their functions. The
appearance and purpose of operator controls and indicators is described with procedures for
operation, start-up, shutdown and basic maintenance included.

MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
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Page Number:
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1.3 DEFINITIONS
UNINTERRUPTIBLE POWER SUPPLY SYSTEM (UPS) - All components within the UPS
Cabinet and associated batteries that function as a system to provide continuous, conditioned
AC power to a load. This is sometimes referred to as the "System".
UPS CABINET – The metal enclosure which is the main part of UPS and composed of the
Bypass module, the 3
～ 6 UPS modules, and the Cable Entry Section.
LINK CABINET – The metal enclosure in which buses from UPS are connected.
UPS MODULE - The metal enclosure which contains the Converter / Inverter, Charger, and
internal control systems required to provide specified AC power to a load.
CONVERTER / INVERTER - The UPS components which contain the equipment and controls
necessary to convert input AC power to output AC power required by the critical load.
CHARGER
- The UPS components which contain the equipment and controls necessary to
regulate DC power required for battery charging and for supplying power to the Inverter.
BYPASS MODULE - The metal enclosure which contains the Bypass line, the Static transfer switch,
UPS operator controls, and internal control systems.
BYPASS LINE - The line which conducts electricity directly from the input power source to the
critical load during Maintenance or whenever the UPS is not completely operational.
STATIC TRANSFER SWITCH - The device which connects the critical load to the bypass line
when the Inverter cannot supply continuous power.
AC INPUT POWER - Power provided by the electrical utility company, or auxiliary generator,
which is connected to the UPS for supplying the critical load.
BATTERY - The rechargeable battery strings which supply DC power to the inverter to maintain
continuous AC power to the load during AC input power failure conditions.

MITSUBISHI ELECTRIC 9900CX SERIES UPS
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1.4 OPERATION OVERVIEW
The UPS provides two power paths between the utility source and the critical load.
Figure 1.1 shows the path for normal operation, with the load powered from the inverter. Figure
1.2 shows the path for bypass operation, with the load supplied through the static bypass line.
A) Normal operation: Load power supplied by each system UPS inverter.
Figure 1.1 Single Line Diagram - Normal Operation: Load powered by UPS inverter
During normal operation, the path through the UPS inverters is used to power the load.
Referring to Figure 1.1: Input AC power is converted to DC by the Converter. DC power is
utilized to charge the UPS battery and to provide power to the Inverter. The Inverter converts
the DC power to clean AC power to supply the critical load.
The conversion - inversion process eliminates any voltage transients or fluctuations existing in
the input power before it reaches the critical load.
～
～ ～ ～
Bypass Module
CB3
CONVERTER / INVERTER
CHARGER
52C
Static Transfer
Switch
52S
CB1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module UPS
CABINET
AC
input
Battery
Cabinet
Bypass
Input
CB
Output
supplied
MCCB
User
supplied
MCCB
CB
External
BATTERY
Power Flow
Not in Use
Output
CB
3 ～ 6 UPS
modules

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The power drawn by the critical load is equally shared between all UPS whenever the system is
in the Parallel Operation.
In the event of a UPS module failure during Parallel Operation, the critical load power will be
continually supplied and shared by all other UPS.
The Bypass Input circuit breaker (MCCB) for protection of the UPS and cables are
field supplied and field installed. (See WARNING 4 on page 1-4).

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B) Bypass Operation: Load Power supplied through UPS internal static bypass line.
Figure 1.2 Single Line Diagram - Bypass Operation: Load fed through static bypass line
Referring to Figure 1.2: The Internal Bypass line is a Hard-wired line through 52S which
supplies the critical load with unconditioned bypass input power. Upon switching to the Internal
Bypass line, the Static Transfer Switch line through CB3 (herein after STS contactor CB3)
supplies the power immediately, and then the Internal Bypass line through 52S supplies the
power. In the event of a switching to the Bypass line, the power to the critical load will be
uninterrupted. The purpose of this Internal Bypass line is to route power to the critical load while
the UPS module is de-energized (converter and inverter), and during Start-up before the system
is fully operational.
Each UPS internal static bypass line will equally share the power supplied to the critical load in
the Parallel Operation if a cable length of bypass line is equal each other. For a MMS unable to
equalize the cable length, additional rectors should be installed to compensate the difference in
cable impedance.
Bypass Module
CB3
CONVERTER / INVERTER
CHARGER
52C
Static Transfer
Switch
52S
CB1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module
AC
input
Bypass
Input
CB
User
supplied
MCCB
User
supplied
MCCB
CB
Power Flow
Not in Use
Output
Battery
Cabinet
External
BATTERY
CB
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module UPS
CABINET
～
～ ～ ～
3 ～ 6 UPS
Modules

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In the event of a load overcurrent, the UPS transfers to bypass without interruption to the critical
load. In the case of the Parallel Operation, all UPS will transfer to bypass without interruption to
the critical load.
The internal control system determines the operation of the two paths, with the load powered
from the inverter being the normal operation.
C) Battery operation: Load Power supplied by UPS battery.
Figure 1.3
Single Line Diagram - Battery Operation
Referring to Figure 1.3: In the event of AC input source failure or interruption, the UPS
Converter(s)* will de-energize and the UPS battery(s)* will immediately discharge and supply
DC power to the Inverter to maintain continuous AC power to the load. This operation will
continue until:
Bypass Module
CB3
CONVERTER / INVERTER
CHARGER
52C
Static Transfer
Switch
52S
CB1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module UPS
CABINET
AC
input
Bypass
Input
CB
supplied
MCCB
User
supplied
MCCB
CB
Power Flow
Not in Use
Output
Battery
Cabinet
External
BATTERY
CB
～
～ ～ ～
3 ～ 6 UPS
modules

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a) The battery capacity expires and the inverter turns off, or
b) Input power is restored after which the converter will power the inverter and critical load
and simultaneously recharge the batteries.
A fully charged battery will provide power for the specified time at the rated load, or longer, at a
reduced load. (s)* : In the case of the Parallel Operation
When power is restored after a low battery shutdown, the UPS converter(s)* automatically
restarts operation, the charger(s)* recharges the batteries and the Inverter(s)* is automatically
restarted without operator intervention. Load is automatically assumed by the inverter without
operator intervention. (s)* : In the case of the Parallel Operation
The power drawn by the load is equally shared between all UPS regardless of the presence
or absence of the UPS that is (are) in battery operation or not whenever the system is in the
Parallel Operation. .

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Figure 1.4 UPS Parts Location
1) UPS cabinet – Front View
2) Backside of Bypass Module door
UPS Module
Cable Entry
Section
Bypass ModuleLCD Touch Panel
Monitor Display
LCD Touch Panel
Monitor Display
Display PCB
DPAU-89
Main PCB
UPJR-D

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3) UPS cabinet – Front Inside View
External I/F PCB
IOAU-19
CB2 CB1(left), 52C(right)
(Back Side of PCB Unit)
52S CB3
DC
INPUT
DC
INPUT
A
C
INPUT BYPASS
INPUT
A
C
OUTPUT