Emerson 7400M Series User manual

Series7400M UPS
USER MANUAL
Single Module
Parallel 1+N
Esc
7400M
UNINTERRUPTIBLEPOWER SYSTEM
Esc
7400M
UNINTERRUPTIBLEPOWER SYSTEM
Part No. : 500203072038 Revision : 01

02/02 1
Dear Customer,
Please accept our thanks for giving us the privilege to serve you by choosing a Liebert
make ‘UPS’.
If this is your first Liebert UPS, we hope it is the beginning of a long relationship which
delivers value to your organisation. If you already own and use a Liebert UPS, we are
doubly honoured by your decision of continuing this relationship.
It is our constant endeavour to partner you for the growth and success of your business.
This philosophy is reflected in our Mission statement “To deliver value through Air &
Power Quality solutions to achieve customer delight”. Please do give us feedback to help
us realise our Mission.
Emerson Network Power (India) Pvt. Ltd.

02/02 2
This manual contains information concerning the installation, operation and maintenance of the
Liebert Series 7400-M Uninterruptible Power System (UPS) for the Single Module and One plus One
Systems.
All relevant parts of the manual should be read prior to commencing installation.
The UPS must be commissioned by an engineer approved by the manufacturer (or his agent)
before being put into service. Failure to observe this condition will invalidate any implied
warranty.
The Series 7400-M UPS has been designed for Commercial / Industrial use only.
The Series 7400-M UPS has not been designed for direct use in any life support application.
If you encounter any problem with the procedures contained in this manual you should seek
immediate assistance from Emerson Network Power Sales Office from whom the equipment was
purchased. Alternatively contact the Emerson Network Power -Customer Service & Support
department at the address shown below:
Emerson Network Power (India) Pvt. Ltd.
Plot No. C-20, Road No. 19
Wagle Industrial Estate
Thane –400 604, INDIA
Phone : [phone]
25802388
Fax : [phone]
25828358
Emerson Network Power pursues a policy of continual product development and reserves the right to
change the equipment without notice.
@ Copyright 2002 by Emerson Network Power
Unauthorized reproduction prohibited
All rights reserved
IMPORTANT

02/02 3
REGISTERED HEAD OFFICE
Emerson Network Power (India) Private Limited
PLOT NO. C-20, ROAD NO. 19
WAGLE INDUSTRIAL ESTATE
THANE –400 604 MAHARASHTRA, INDIA
TELEPHONE: [phone]
FAX: [phone]
*** WEST ZONE ***
Mumbai
Address: B-414, 424, Bhaveshwar Arcade, (opp. Shreyas cinema), LBS Road, Ghatkopar,
Mumbai 400 086
Tel: [phone]
Fax: [phone]
Pune
Address: B/6, Shree Dwarka Co-op. Soc., Hare Krishna Mandir Path, Model Colony, Off.
University Road, Pune 411 016
Tel: [phone]
Fax: [phone]
Baroda
Address: 39 / 2, Arunodaya Soc., Alkapuri, Baroda 390 005
Tel: [phone]
Fax: [phone]
Nagpur
Address: 203, Ganga Apts, 13, Giripeth, Nagpur 400 010
Tel: [phone]
Fax: [phone]
*** SOUTH ZONE ***
Bangalore
Address: No. 412, Jindal Center, 2nd Flr, 100 Fleet Road, Koramangalam, Opp.
Sukhsagar Hotel, Bangalore -95
Tel: [phone] / 5770 / 5870
Fax: [phone]
Chennai
Address: OMS Court, No. 1, Nathamuni Street, T., Nagar, Chennai 600 017
Tel: [phone]
Fax: [phone]
Kochin
Address: "Nedumparambil", No. 1419/36, Kattakara Road, Kaloor, Kochin 682 017
Tel: [phone]
Fax: [phone]
Secunderabad
Address: 1-1-40/1, 2nd floor, Vasavi Towers, S. D. Road, Secunderabad -500 003
Tel: [phone] / 5/ 6
Fax: [phone]

02/02 4
*** EAST ZONE ***
Kolkatta
Address: Jindal Towers, 21/1A/3, Darga Road, Kolkata -700 017
Tel: [phone]
Fax: [phone]
Bhubaneshwar
Address: 69, Satya Nagar, Bhubaneshwar 751 007
Tel: [phone]
Fax: [phone]
Jamshedpur
Address: Kashi Kunji, Road No. 2, Ground Floor, Contractors Areas, Bistupur, Jamshedpur
831 001
Tel: [phone]
Fax: [phone]
*** NORTH ZONE ***
New Delhi
Address: 18/14, WEA, Pusa Lane, Karol Baug; New Delhi 110 005
Tel: [phone] / 18
Fax: [phone]
Chandigarh
Address: SCO No. 272, Sector 32 -C & D, 1st Floor, Above Punjab and Sind
Bank,Chandigarh.
Tel: [phone]
Fax: [phone]
Lucknow
Address: 213, 2nd Floor, Saran Chambers-II, 5, Park Road, Lucknow -226 001 (U.P)
Tel: [phone]
Fax: [phone]
Guwahati
Address : C/o. Ashok Bhasin, South Sarania, Ashram Road, (Near GMC Tax Office),
Ulubari, Guwahati -
781 007.
Tel: [phone]
Fax: [phone]
(Updated: December 1, 2004)

02/02 5
Safety Procedure
WARNING
In a domestic environment, this product may cause radio interface in which case the user may be
required to take additional measures.
WARNING
HIGH EARTH LEAKAGE CURRENT: EARTH CONNECTIONS IS ESSENTIAL BEFORE CONNECTING THE
INPUT SUPPLY. This equipment must be earthed in accordance with local electrical codes.
WARNING
THIS UPS DOES NOT INCORPORATE AUTOMATIC BACKFEED PROTECTION. A WARNING LABEL MUST
BE FITTED TO ALL EXTERNAL PRIMARY POWER ISOLATIONS STATING.
INSULATE THE UNINTERRUPTIBLE POWER SYSTEM BEFORE WORKING ON THIS CIRCUIT.
GENERAL
As with other types of high power equipment, dangerous voltages are present within the UPS and battery
enclosure. The risk of contact with these is minimised as the live component parts are housed behind a
hinged, lockable door. Further internal safety screens make the equipment protected to IP20 standards.
No risk exists to any personnel when operating the equipment in the normal manner, following the
recommended operating procedures.
All equipment maintenance and servicing procedures involve internal access and should be carried out
only by trained personnel.
BATTERIES
Battery manufacturers supply details of the necessary precautions to be observed when working on, or in
the vicinity of a large bank of battery cells. These precautions should be followed implicitly at all times.
Particular attention should be paid to the recommendations concerning local environmental conditions
and the provision of protective clothing, first-aid and fire fighting facilities
TEST EQUIPMENT
When the battery is under charge, it is earth-referenced about its mid-point –e.g. if the battery is being
charged at 460V the battery extremities will be at +230V and –230V with respect to neutral (earth).
When using mains-powered test equipment such as oscilloscopes in the UPS voltage area, always use a
differential mode of operation to avoid the need to disconnect the oscilloscope frame earth.
PERSONNEL
When working inside the UPS (trained personnel only) it is recommended that protection be worn to
prevent eye damage, should an electric arc be struck by mishandling or severe electrical fault.
Some of the power components are very heavy. If their removal is necessary, ensure that sufficient
manpower is available; otherwise use adequate mechanical handling equipment.
When working in the general area of the UPS where high voltages are present, a second person should
be standing-by to assist and summon help in case of accident.

02/02 6
Chapter 1-General Description 9
1.1 Introduction 9
1.2 Design Concept 9
1.2.1 7400-M Module Design 9
1.2.2 Bypass supplies 10
1.2.3 UPS Power Switch Configuration 11
1.2.4 Battery Circuit Breaker 11
1.2.5 Battery Cabinet/ Racks 11
1.2.6 Battery Circuit Breaker Box 11
1.2.7 Battery temperature compensation (optional) 11
1.3 Operator Control and Display Panel 13
1.3.1 LED Indications 14
1.3.2 LCD Display 15
Chapter 2-Operating Instructions 19
2.1 Introduction 19
2.1.1 General notes 19
2.2 Procedure for switching the UPS to Power the Load from a Power off condition 21
2.3 Procedure for switching the UPS into a Maintenance Bypass condition
from normal operation 22
2.4 Procedure for Switching the UPS ON from a Maint. Power down condition 24
2.5 Procedure for completely powering down the UPS 25
2.6 Procedure for carrying out a RESET after a recognised
controlled transfer to bypass or EPO action 27
Chapter 3 -Installation Procedure 28
3.1 Introduction
3.1.1 Equipment positioning and Environmental considerations 29
3.1.2 Raised floor installation 29
3.1.3 Battery Location 30
3.2 Preliminary Checks 32
3.3 Connecting the UPS power cables 33
3.3.1 Cable entry 33
3.3.2 Cable rating 33
3.3.3 Cable connections 34
3.3.4 Safety earth 34
3.3.5 Protective devices 34
3.3.6 Cabling procedure 35
3.4. Battery Installation 39
Table of Contents

02/02 7
Chapter 4-Optional Equipment 42
4.1 AS400 Alarm Interface Board 432
4.1.1 Remote control inputs 42
4.1.2 AS400 Interface 42
4.1.3 Alarm outputs 44
4.1.4 X2 Extension 44
4.2 Remote Alarms Interface Board 45
4.2.1 Alarm outputs 45
4.3 Additional 3 X A5400 Interface 48
4.4 Remote Alarm Monitor 49
4.4.1 Connections 49
4.5 Battery cabinet/ Racks 51
4.6 Battery circuit breaker boxes 54
4.6.1 Temperature Sensor Board 54
4.7 Communications Kits 56
Chapter 5 -Maintenance 58
5.1 Introduction 58
5.2 Safety Precautions 58
5.3 Scheduled Maintenance 58
5.3.1 Daily cheeks 58
5.3.2 Weekly checks 59
5.3.3 Annual service 59
5.3.4 Extended service 60
5.3.5 Battery maintenance 60
5.4 UPS Status parameters 61
Chapter 6 -Troubleshooting 63
6.1 Troubleshooting UPS systems 63
6.1.1 Operating parameters and limitations 63
6.1.2 General Troubleshooting Procedure 63
6.2 LED interpretation 65
6.3 Display panel message interpretation 66
6.4 Number of messages, red LED and buzzer 68
Chapter 7 -1 +1 Parallel System 70
7.1 Generality 70
7.1.1 Introduction 70
7.1.2 Design concept 73

02/02 8
7.2 Operating Instructions 75
7.2.1 Generality 75
7.2.2 Switching the system to Power the load from a power off condition 75
7.2.3 Switching the system to Maintenance bypass from Normal operation 75
7.2.4 Switching the system ON from a Maintenance power down condition 75
7.2.5 Powering down the system 75
7.2.6 Reset of the system after a recognised transfer to bypass or EPO Action 76
7.2.7 Powering down and insulating one module, the other still operating and back 76
7.3 Installation Procedure 77
7.3.1 Preliminary Cheeks 77
7.3.2 Power cables 78
7.3.3 Control cables 79
7.4 Optional Equipment 80
7.4.1 Auxiliary Battery Distribution Boxes 80
7.5 Specifications for 1 +1 configuration 83
Chapter 8 -Specification Single Module 84
abababab
abab
ab

02/02 9
1.1 Introduction:
The 7400-M series Uninterruptible Power Supply (UPS) system is
connected between a critical load, such as a computer, and its three
phase mains power supply. Being designed to furnish a well
regulated 3 phase output power supply under all rated load and input
supply conditions, the system offers the user the following advantages:
Increased power quality:
The UPS has its own internal voltage and frequency regulator which
ensure that its output is maintained within close tolerances
independent of voltage and frequency variations on the mains power
lines.
Increased noise rejection:
By rectifying the input AC power to DC power, and then converting it
back to AC, any electrical noise present on the input mains supply line
is effectively isolated from the UPS output, therefore the critical load
sees only clean power.
Power blackout protection:
If the mains power fails, the UPS continues to power the critical load
from its battery source, leaving the load immune from power
disturbances.
1.2 Design Concept
1.2.1 7400-MModuleDesign This section describes an individual module’s operating principles.
The UPS basically operates as an AC-DC-AC converter (see figure 1-
1). The first conversion stage (from AC to DC) uses a 3 phase, fully
controlled SCR bridge rectifier to convert the incoming mains supply
into a regulated DC busbar.
The DC busbar produced by the rectifier provides both battery
charging power and power to the inverter section –which utilizes the
latest IGBT switching, pulse width modulation (PWM) design and
provides the second conversion phase; i.e. reconverting the DC
busbar voltage back into an AC voltage waveform.
Chapter 1 –General Description
Figure 1-1: Single Module Block Diagram
RECTIFIER STATIC
SWITCH
INVERTER
BATTERY
Bypass
Supply
Mains
Supply
UPS
Output
Supply

02/02 10
During normal operation both the rectifier and inverter sections are
active and provides regulated load power whilst simultaneously float
charging the battery. In the event of a mains power failure, the
rectifier becomes inoperative and the inverter is powered solely from
the battery. Critical load power is maintained under these conditions
until the battery is fully discharged, whereupon the UPS shuts down.
The end of a battery discharge is assumed when the battery voltage
falls below a preset value (i.e. 330V d.c. for a 400 V AC system.
The period for which the load can be maintained following a mains
power failure is known as the system’s ‘Autonomy Time’ and is
dependent upon both the battery A/hr capacity and the applied
percentage load. It is usual in larger installations to provide an
alternative UPS input power source from a stand by generator when
the mains supply fails. Once such a generator has been brought on-
line, and the UPS input power has been re-established, the batteries
immediately begin to recharge. Modern generators can be started
and brought on-line very quickly and where such a facility is
incorporated into the UPS installation, it results in short battery
discharge periods and correspondingly rapid recharge times.
The circuit block annotated ‘Static Switch’ in figure 1-2 contains an
electronically controlled switching circuit which enables the critical
load to be connected either to the inverter output or to a bypass
power source via the ‘static bypass line’. Normally, the load is
connected to the inverter via a static switch circuits but in the event of
a UPS overload, or inverter failure, it is automatically transferred to
the Static bypass line.
To provide a clean (no-break) load transfer between the inverter and
static bypass line, the static switch activates connecting the load to the
bypass supplies followed by inverter static switch opening. To achieve
this, the inverter output and bypass supply must be fully synchronized
during normal operating conditions. This is achieved through the
inverter control electronics which make the inverter frequency track
that of the static bypass supply-provided that the bypass remains
within an acceptable frequency window. The synchronising window
is pre-selected to 2% (selectable upto 9%) of nominal frequency,
giving an acceptable frequency window of ±1Hz.
RECTIFIER STATIC
SWITCH
INVERTER
BATTERY
Bypass
a.c.
Supply
Rectifier
Input
a.c.
Supply
UPS
Output
a.c.
Supply
Battery
Circuit
Breaker
Output
Power
Switch Q4
Rectifier
Input
Switch Q1
Maintenance Bypass
Power Switch Q3 Maintenance Bypass Line
Static Bypass Line
Bypass Power Switch Q2
RECTIFIER STATIC
SWITCH
INVERTER
BATTERY
Bypass
a.c.
Supply
Rectifier
Input
a.c.
Supply
UPS
Output
a.c.
Supply
Battery
Circuit
Breaker
Output
Power
Switch Q4
Rectifier
Input
Switch Q1
Maintenance Bypass
Power Switch Q3 Maintenance Bypass Line
Static Bypass Line
Bypass Power Switch Q2
Figure 1-2: UPS Power Switches Configuration
1.2.2BypassSupplies
7400M
-
Series UPS User Manual
Single Module and 1+N Parallel System

02/02 11
A (INV: UNSYNCHRONISED) warning message is displayed on the
operator control panel when the inverter and bypass supplies are not
synchronised; a second manually controlled, ‘maintenance bypass’
supply is also incorporated into the UPS design. Its purpose is to
enable the critical load to be powered from the mains (bypass) supply
while the UPS is shut down for maintenance or troubleshooting.
Note: The load is unprotected against mains power supply aberrations
or failure when it is connected to either the static bypass or maintenance
supply.
The power switch locations in the various 7400-M models are shown
in Figure 1-3. Figure 1-2 illustrates the 7400-M Series UPS module in
what is known as the “Split Bypass” configuration. In the “Split
Bypass” configuration the static bypass line is connected by a separate
power switch to a dedicated “Bypass” power source which also feeds
the maintenance bypass line. Where a separate power source is not
available, the bypass (Q2) and Rectifier input supply connections
would be linked together.
With the exception of the maintenance bypass isolators, all the
isolators shown must be closed during normal UPS operation.
The battery is connected to the DC busbar, through a circuit breaker
fitted inside the battery cabinet or located adjacent to the batteries
where a battery cabinet is not used. This circuit breaker is closed
manually, but it contains an under-voltage release coil which enables
it to be tripped down from the UPS control electronics following
certain detected faults. It also has a magnetic trip facility for overload
protection.
The batteries associated with the UPS are generally housed in a
purpose built cabinet/ racks located alongside the main UPS
equipment.
It is possible to install batteries of various types and capacity in the
cabinet/ rack to obtain the required autonomy characteristics.
The battery cabinet can be purchased in one of the following forms:
1. Complete installation comprising the battery cabinet/ rack,
batteries and circuit breakers.
2. Battery cabinet/ rack and circuit breaker only –with no batteries.
3. Battery cabinet/ rack only –with no batteries or c/b..
As an alternative to the battery cabinet, a battery circuit breaker can
be provided in a custom built box. This Battery Circuit Box is
designed to be wall or rack mounted and is connected between the
UPS and Battery.
For systems with batteries installed in non-optimized temperature
conditions, the 7400-M offers a battery temperature compensation
(optional). As the temperature inside the battery cabinet / area rises
the DC busbar voltage reduces in order to sustain the battery at its
optimum charge voltage. This will assist in prolonging the life of the
batteries.
1.2.3
UPSPowerSwitch
Configuration
1.2.4
BatteryCircuitBreaker
1.2.5 BatteryCabinet/Racks
1.2.6
Batterycircuit
BreakerBox
1.2.7
BatteryTemperature
Compensation
7400M
-
Series UPS User Manual
Single Module and 1+N Parallel System

02/02 12
Figure 1-3: UPS Power Switch Locations
A = (Q1) Rectifier Input Power Switch
B = (Q2) Static Bypass Input Power Switch
C = (Q3) Maintenance Bypass Power Switch
D = (Q4) UPS Output Power Switch
1 = Reset Push-button
A
B
C
D
1
2
A
B
C
D
1
2
7400M
-
Series UPS User Manual
Single Module and 1+N Parallel System

02/02 13
1.3 Operator Control and Display Panel
The operator control and display panel can be divided into two
functional sections: ‘LED Indications’ and ‘Control and Display. As
can be seen the upper section consists of LEDs which indicate the
operational and alarm status of the system by turning ON and OFF or
by flashing ON / OFF. This section can be further split into five
separate areas as identified in figure 1-4.
The lower section of the operator control and display panel consists of
a LCD (Liquid Crystal Display) and its associated switches.
Figure 1-4: Operator Control/ Display Panel
Figure 1-5: LED Indications
Esc
7400 M
UNITERRUPTIBLE POWER SUPPLY SYSTEM
Esc
7400 M
UNITERRUPTIBLE POWER SUPPLY SYSTEM
368
1
2 4 5 97
368
1
2 4 5 97
7400M
-
Series UPS User Manual
Single Module and 1+N Parallel System

02/02 14
The control and display panel LED indications are illustrated in figure
1-5 and described in the following text:
1. Bypass AC Input supply present:
This LED illuminates when the bypass AC input power switch is
closed and the Input supply is within off set value nominal voltage
(default ±10%).
2. Load on Inverter:
This LED illuminates when the output power switch is closed and the
load is connected to Inverter via the input mains supply.
3. Load on bypass:
This LED illuminates when the output power switch is closed and the
load is connected to the bypass AC supply via the bypass static switch.
4. Battery Issues:
This LED illuminates when the battery is discharging and flashes when
the battery circuit breaker is open.
5. 5 LED bargraph indicating 0% load:
These LEDs illuminate progressively from the left to indicate the
applied load as a percentage of the maximum current load, increasing
in 20% steps to 100% full load when all five LEDS are illuminated.
The applied load reading is taken from the phase supplying the
highest load.
6. 5 LED bargraph indicating % battery charge state or battery time
remaining:
These LEDs illuminate progressively from the left to indicate the state
of charge of the battery as a percentage of full charge, increasing in
20% steps to 100% when all five LEDs are illuminated.
When the mains AC input supply fails and the UPS is operating on
the battery, this bargraph changes to give the battery time remaining.
With a fully charged battery all five LEDs will illuminate showing ten
minutes or more autonomy, as time elapses the LEDs will extinguish
in steps starting from the right hand side.
7. Overload indication:
This amber LED is situated at the end of the % load bargraph and
illuminates to indicate that the applied load has exceeded 100%. This
indication will be accompanied by audible and visual LCD warnings.
8. Low Battery:
This amber LED is situated at the end of the % battery charge
bargraph and illuminates when operating on battery to indicate that
the battery voltage is low at 1.8 volts per cell and that the UPS will
shortly shut down.
9. Alarm warning indication / alarm silence switch:
This red LED will flash whenever the UPS detects certain fault
conditions and will normally be accompanied by an audible warning.
Pressing the button will silence the audible warning but will not cancel
the visual indication if the fault condition is still present.
1.3.1
LEDIndications
7400M
-
Series UPS User
Manual
Single Module and 1+N Parallel System

02/02 15
Switch -Emergency Power Off (EPO):
The optional EPO switch is located remote to the UPS cabinet in a
position agreed with the user. When the EPO switch is pressed it
disables the static switch block entirely (so removing load power). It
also disables the rectifier and inverter, and trips the battery circuit
breaker. Under normal circumstances it does not remove UPS input
power since this is applied through a manually controlled external
isolator; however, if the UPS input supply is connected via a circuit
breaker having an electrical trip facility, emergency power off and
other (insulated) section can be used to drive the external circuit
breaker's trip circuit.
The LCD consists of a window and four push buttons. The display is
capable of showing 4 rows of 20 characters and is used to indicate the
UPS operating parameters, warnings and alarms. The push buttons
permit the operator either to select options from a menu for display
on the window, or else to charge the value of certain parameters.
ENTER (4)
Pressing ‘ENTER’, when selecting options, displays the next window.
The next window is determined by the option, which has been elected
in the present window. When selecting new parameters, it saves the
new parameters.
ESCAPE:
Pressing ‘ESCAPE’ cancels the most recent actions, i.e. when selecting
options, it returns the previous window to the LCD; when setting
parameters, it exits the window without saving the new settings.
UP (1)
The UP push button moves a cursor up the LCD over the options
offered on certain windows, and moves a rectangular cursor to the
next digit on the right when changing parameter values in others.
DOWN (2)
The DOWN pushbutton moves a cursor down the LCD over the
options offered on certain windows, and changes the highlighted
parameter values in others.
Figure 1-5: LED Indications
Esc
1 5
7400 M
UNITERRUPTIBLE POWER SUPPLY SYSTEM
2 43
Esc
1 5
7400 M
UNITERRUPTIBLE POWER SUPPLY SYSTEM
2 43
1.3.2
LCDDisplay
7400M
-
Series UPS User Manual
Single Module and 1+N Parallel System

02/02 16
The Menu options
A map of the routes to the options offered by the menu is provided in
figure 1-7. Options include windows which show status information
and windows which permit data to be entered, or parameters for
equipment control to be set. The menu map shows that the routes
pass from the main menu through different intermediate windows to
reach the option targeted. The diagram shows each of the windows
in the format in which it appears on the LCD screen. The initializing,
default and main menu windows are described below.
LCD Display Panel Messages:
•Initializing Window:
After first connecting power to the UPS and closing the bypass AC
input power switch, the INITIALIZATION message will appear on the
LCD screen. It persists for about five seconds while the control
firmware is loaded and the unit performs a self-test. It is followed by a
window showing various messages with the time and date on the
bottom line.
When the power switches and battery circuit breaker have been
closed and the inverter has stabilized the window will change to the
default window.
•Default Window:
The message shown below, will be seen on the default window
whenever the UPS is operating normally:
The top lines display the UPS operational status and indicates alarm
conditions when they occur; and line four normally shows the time
and date. Refer to Chapter 6 –Troubleshooting, for more details.
•Info Window:
From default window, pressing the ESC key, information about the
modem programmed in memory ( see communication handbook)
and its connection are shown on display.
Pressing again the ESC key, software release are shown, both on UPS
board and on Panel board: this feature is useful upgrading SW for
next versions and to know exactly features of present release.
Pressing again ESC key it goes back to Default window.
•Main Menu Window:
The main menu is selected from the default window by pressing the
ENTER key:
The four windows accessed from the main menu offer further options
which are described in the relevant chapters of this manual.
The MEASUREMENT option gives access to windows which show the
present values of parameters such as input & output voltage and
current, load etc. These parameters are useful when determining the
state of UPS or causes of alarms, and are described in more detail in
chapter 5-Maintenance.
LIEBERT
UPS
RECTIF. SWITCH OPEN
BATTERY SWITCH OPEN
OUTPUT SWITCH OPEN
hh.mm.ss dd.mm.yy
NORMAL OPERATION
hh.mm.ss dd.mm.yy
M0DEM TYPE
M-TECH.1932-ZDX
MODEM STATUS
NOT CONNECTED
SW VERSION
PANEL V 04.0
UPS LOGIC V 04.0
>MEASUREMENT
<
FUNCTION
MAINTENANCE
SETUP
7400M
-
Series UPS User Manual
Single Module and 1+N Parallel System

02/02 17
NORMAL OPERATION
11:15.50 01.02.98
NORMAL OPERATION
11:15.50 01.02.98
>MEASUREMENT <
FUNCTION
MAINTENANCE
SETUP
>MEASUREMENT <
FUNCTION
MAINTENANCE
SETUP
RECTIF. SWITCH OPEN
OUTPUT SWITCH OPEN
INV.: UNSYNCHRONIZED
11:15.50 01.02.98
RECTIF. SWITCH OPEN
OUTPUT SWITCH OPEN
INV.: UNSYNCHRONIZED
11:15.50 01.02.98
MODEM TYPE :
M-TECH.1932-ZDX
MODEM STATUS :
NOT CONNECTED
MODEM TYPE :
M-TECH.1932-ZDX
MODEM STATUS :
NOT CONNECTED
SW VERSION
PANEL V 04.0
UPS LOGIC V 04.0
SW VERSION
PANEL V 04.0
UPS LOGIC V 04.0
>OUTPUT <
INPUT
BATTERY
TEMPERATURE
>OUTPUT <
INPUT
BATTERY
TEMPERATURE
>VOLTAGE <
CURRENT
POWER
FREQUENCY
>VOLTAGE <
CURRENT
POWER
FREQUENCY
OUTPUT : [Vrms]
VOLTAGE [Vrms]
A-B B-C C-A
XXX XXX XXX
OUTPUT : [Vrms]
VOLTAGE [Vrms]
A-B B-C C-A
XXX XXX XXX
OUTPUT : [Vrms]
VOLTAGE [Vrms]
A-N B-N C-N
XXX XXX XXX
OUTPUT : [Vrms]
VOLTAGE [Vrms]
A-N B-N C-N
XXX XXX XXX
CURRENT: [AMPS]
A B C
XXXX XXXX XXXX
N XXXX
CURRENT: [AMPS]
A B C
XXXX XXXX XXXX
N XXXX
LOAD : [%]
A B C
XXX XXX XXX
LOAD : [%]
A B C
XXX XXX XXX
REAL POWER : [KW]
A B C
XXXX XXXX XXXX
REAL POWER : [KW]
A B C
XXXX XXXX XXXX
APP. POWER [KVA]
A B C
XXXX XXXX XXXX
APP. POWER [KVA]
A B C
XXXX XXXX XXXX
FREQUENCY : [Hz]
INVERTER XX.X
BYPASS XX.X
FREQUENCY : [Hz]
INVERTER XX.X
BYPASS XX.X
INPUT:
VOLTAGE [Vrms]
A-B B-C C-A
XXX XXX XXX
INPUT:
VOLTAGE [Vrms]
A-B B-C C-A
XXX XXX XXX
BATTERY:
VOLTAGE XXX [V]
CURRENT XXXX [A]
CHARGE XXX [%]
BATTERY:
VOLTAGE XXX [V]
CURRENT XXXX [A]
CHARGE XXX [%]
TEMPERATURE:
Tc xxx.x To xxx.x
Ta xxx.x Tb xxx.x
TEMPERATURE:
Tc xxx.x To xxx.x
Ta xxx.x Tb xxx.x
OUTPUT
>INPUT <
BATTERY
TEMPERATURE
OUTPUT
>INPUT <
BATTERY
TEMPERATURE
OUTPUT
INPUT
>BATTERY <
TEMPERATURE
OUTPUT
INPUT
>BATTERY <
TEMPERATURE
OUTPUT
INPUT
BATTERY
>TEMPERATURE <
OUTPUT
INPUT
BATTERY
>TEMPERATURE <
_WRITE SAVE _
_MOVE EXIT _
INPUT PASSWORD
????????
_WRITE SAVE _
_MOVE EXIT _
INPUT PASSWORD
????????
_WRITE SAVE _
_MOVE EXIT _
INPUT PASSWORD
????????
_WRITE SAVE _
_MOVE EXIT _
INPUT PASSWORD
????????
_WRITE SAVE _
_MOVE EXIT _
INPUT PASSWORD
????????
_WRITE SAVE _
_MOVE EXIT _
INPUT PASSWORD
????????
E E
E
or. for
instance
FUNCTION
MAINTENANCE
SETUP
E
PRESS DOWN KEY
PRESS ENTER KEY
PRESS ESCAPE KEY
Figure 1-7: Map of Screen Display available to Operator
7400M
-
Series UPS User Manual
Single Module and 1+N Parallel System

02/02 18
The FUNCTION, MAINTENANCE and SETUP options all require a
password which is set by the commissioning engineer. This manual
does not provide servicing instructions and the options accessed from
these windows are therefore not shown on the menu map in figure 1-
7. Only trained service engineers should be authorized with a
password. Refer to the Commissioning Manual for details.
In any case FUNCTION, MAINTENANCE and SETUP options can be
read but is not possible to change them without password.
§Option Selection Mode:
If a window from which options can be selected is displayed, a
pair of indicator arrows appear at the extremities of the line.
The UP/DOWN push buttons move these up and down the
screen over the options. When the arrows point at a chosen
option, press ENTER to display the next window. Press ESCAPE
to return the previous window to the screen.
§Alarm / Warning messages:
The Alarm and Warning messages are shown on the three upper
lines of the display. The ALARM indicator (red) and audible
warning accompany all Alarm messages.
There is a default selection for every message and corresponding
mode of red indicator (OFF, ON, FLASHING) and buzzer sound
(OFF, ON, INTERMITTENT, SINGLE SOUND).
The default mode can be changed according to particular needs
of the plant, a PC and communication program are needed (see
Communication Handbook).
The Alarm and Warning messages are detailed in Chapter 6
Troubleshooting of this manual.
7400M
-
Series UPS User Manual
Single Module and 1+N Parallel System

02/02 19
2.1 Introduction
The UPS can be considered to be in one of three operating
conditions:
§Normal operation -All relevant power switches and circuit breakers
closed, the load is powered by the UPS.
§On Maintenance Bypass -UPS shut down but the load connected
to the unprotected mains via the Maintenance Bypass Supply
line.
§Shutdown -All power switches and circuit breakers open no load
power.
This chapter contains instructions which enable you to switch between
the three above conditions, to carry out a RESET after a fault transfer
and how to switch OFF the inverter.
Note 1:
All the user controls and indicators mentioned in these procedures are
identified in chapter 1. Some of the diagrams are repeated here to
assist in understanding the procedures.
Note 2:
The audible alarm may annunciate at various points in these
procedures. It can be canceled at any time by pressing the 'Alarm
Reset' push-button.
Note 3:
The 7400-M series UPS incorporates an optional automatic boost
charge facility which can be used in systems containing conventional
flooded lead-acid batteries. If this type of battery is used in your
installation you may notice that the battery charger voltage may be
greater than its nominal (432V DC for 380V AC, 446V DC for 400V
AC and 459 AC for a 415V AC system) when the mains supply
returns from a prolonged outage. This is the normal response of the
boost charge facility: the charger voltage should return to normal after
a few hours.
Chapter 2 –Operating Instructions
2.1.1
GeneralNotes