Dale Power Solutions E420 User manual

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Dale Power Solutions Ltd
Salter Road, Eastfield Industrial Estate, Scarborough, North Yorkshire YO11 3DU, United Kingdom
Telephone: [phone] Email: [e-mail] www.dalepowersolutions.com
Registration No 941798 England
S5264FU09 Rev 2
Dale Power Solutions Ltd
User Manual
E400 Series UPS
E420
E430
E440
E460
E480

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Dale Power Solutions plc own the copyright to this document, which may not be copied, reproduced or
disclosed to a third party without written permission.
Dale Power Solutions plc reserves the right to make changes in specification without notice or liability. All
information is subject to Dale Power Solutions plc own data and is considered accurate at time of
publishing.

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Contents
Safety ............................................................................................................................................................5 
Warning symbols.......................................................................................................................................5 
Conformity and standards..........................................................................................................................6 
Energy conservation and environmental protection ...............................................................................6 
Product description.....................................................................................................................................7 
Applications ...............................................................................................................................................7 
Product range............................................................................................................................................7 
System block diagram ...............................................................................................................................8 
Split bypass input ................................................................................................................................................. 8 
Static transfer switch ............................................................................................................................................ 8 
Battery temperature compensation ...........................................................................................................9 
Redundant control power supply board ....................................................................................................9 
Single phase outlet....................................................................................................................................9 
Multi-unit operation....................................................................................................................................9 
Installation................................................................................................................................................. 10 
Siting considerations ...............................................................................................................................10 
Wiring considerations ..............................................................................................................................10 
Units in parallel................................................................................................................................................... 11 
Earth leakage current ..............................................................................................................................11 
Operation from a generator .....................................................................................................................12 
Cable sizes..............................................................................................................................................12 
Unpacking the UPS .................................................................................................................................12 
Internal layout (door open) ......................................................................................................................13 
Wiring the UPS........................................................................................................................................14 
Wiring units in parallel .............................................................................................................................17 
Operation................................................................................................................................................... 19 
Working modes........................................................................................................................................19 
On-Line mode..................................................................................................................................................... 19 
Battery mode ...................................................................................................................................................... 19 
Auto-restart mode............................................................................................................................................... 19 
Bypass mode...................................................................................................................................................... 19 
ECO mode.......................................................................................................................................................... 20 
Frequency converter mode................................................................................................................................. 20 
Before switch on......................................................................................................................................20 
Switching on the UPS..............................................................................................................................20 
Commissioning test procedure................................................................................................................22 
Switching off the UPS..............................................................................................................................22 
Transferring the load to an EMBS...........................................................................................................22 
Front panel controls and indicators .........................................................................................................23 
Navigating the system menu .............................................................................................................................. 24 
Input information................................................................................................................................................. 24 
Output information.............................................................................................................................................. 25 

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Inverter information .............................................................................................................................................25 
Battery information..............................................................................................................................................25 
State information.................................................................................................................................................25 
Parallel information .............................................................................................................................................26 
Command information.........................................................................................................................................26 
Setting information ..............................................................................................................................................26 
Recorded events list............................................................................................................................................26 
Version information .............................................................................................................................................27 
Change settings...................................................................................................................................... 27 
LCD display messages........................................................................................................................... 29 
Maintenance .............................................................................................................................................. 30 
Fan.......................................................................................................................................................... 30 
Battery .................................................................................................................................................... 30 
Battery change ....................................................................................................................................... 30 
Visual check............................................................................................................................................ 30 
UPS status check ................................................................................................................................... 30 
Function check ....................................................................................................................................... 31 
Troubleshooting ....................................................................................................................................... 31 
Black Start procedure ............................................................................................................................. 31 
Events..................................................................................................................................................... 31 
Alarm information ................................................................................................................................... 32 
Frequently asked questions.................................................................................................................... 34 
Appendix 1 Signals options .................................................................................................................... 35 
RS232 serial port.................................................................................................................................... 35 
Contact closure for external breakers .................................................................................................... 35 
SNMP card with environmental monitor................................................................................................. 36 
Relay card (monitoring and control) ....................................................................................................... 37 
Dry contact relay signals ........................................................................................................................ 38 
Battery temperature sensor.................................................................................................................... 39 
Appendix 2 Parallel operation ................................................................................................................. 40 
LBS (Load Bus Synchronisation)............................................................................................................ 40 
Remote emergency power off (EPO) ..................................................................................................... 40 
Appendix 3 Specifications ....................................................................................................................... 41 
Electrical ................................................................................................................................................. 41 
Mechanical.............................................................................................................................................. 43 
Appendix 4 Optional equipment ............................................................................................................. 43 

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Safety
WARNING!
THIS EQUIPMENT MUST BE INSTALLED, COMMISSIONED AND MAINTAINED BY A
QUALIFIED ELECTRICIAN.
There are dangerous voltages and high temperatures inside the UPS. During installation, operation and
maintenance please abide by local safety instructions, regulations and laws. Failure to do so may result in
injury to personnel or damage to equipment. Safety instructions in this manual are supplementary to local
safety instructions. Dale Power Solutions plc does not accept any liability caused as a result of failure to
follow safety instructions. Please note the following:
Do not use the UPS for any other purpose than the one for which it was designed.
Do not exceed the rated load of the UPS.
Under no circumstances open the UPS. There are high voltages inside that can cause electric shock.
If the UPS requires internal maintenance or battery replacement, contact Dale Power Solutions plc.
Keep the UPS in a dry well ventilated location away from any area or situation in which there is a risk
of fire, such as direct sunlight or other sources of heat.
If the UPS emits smoke, turn off immediately the input circuit breaker and battery circuit breaker, and
contact Dale Power Solutions plc.
WARNING!
THIS IS A PRODUCT FOR COMMERCIAL AND INDUSTRIAL APPLICATION IN THE
SECOND ENVIRONMENT. INSTALLATION RESTRICTIONS OR ADDITIONAL MEASURES
MAY BE NEEDED TO PREVENT DISTURBANCES (AS STATED IN EN62040-2:2006).
Warning symbols
The safety symbols used in this manual are shown in table below. They alert you to important safety
information that you need to be aware of when installing, operating and maintaining the UPS.
Safety Symbol Indication
Attention
Static discharge sensitive
Electric shock
Caution:
A caution describes a situation in which there is a risk of damage to equipment.
WARNING!
A WARNING DESCRIBES A SITUATION IN WHICH THERE IS A RISK OF INJURY OR
DEATH TO PERSONNEL.

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Conformity and standards
This equipment complies with CE directives 73/23 & 93/68 (LV Safety) and 89/336 (EMC), and the
following product standards for Uninterruptible Power System (UPS):
IEC 62040-1-1 General and safety requirements for use in operator access area
IEC 62040-2 EMC requirements; Class C3 compliant
IEC 62040-3 Performance requirements and test methods
Caution:
Continued compliance requires installation in accordance with the instructions this
manual and the use of manufacturer approved accessories only.
According to IEC62040, this is a low emission class C3 Uninterruptible Power System (UPS) product. In a
residential environment, this product may nevertheless cause radio interference, in which case, you may
be required to take additional measures.
Energy conservation and environmental protection
With an efficiency of greater than 97% in ECO mode the UPS meets the technical specifications for
energy conservation. An input power factor of 0.99 results in minimum current contamination of the power
grid. All the material and components comply with the ROSH standards, ensuring that no hazardous
waste is produced.

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Product description
Applications
This UPS series provides reliable AC backup power to various types of equipment, for example computer
centres, network management centres, auto control systems, and telecommunication systems.
The UPS can be installed and operated as a single unit or it can be operated with other units of the same
type in parallel N+1 redundant mode for additional reliability or in parallel capacity mode for increased
output rating.
Product range
The following table lists the models available in the E400 series. All models are designed to operate with
an external battery.
Capacity 20 kVA 30 kVA 40 kVA 60 kVA 80 kVA
Model E420 E430 E440 E460 E480
Battery location External
E420, E430, E440 E460, E480

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System block diagram
The UPS is connected between the mains a.c. input source and the critical load to provide uninterruptible
power free from disturbances on the mains supply such as voltage and frequency variations. This is
achieved using high-frequency double-conversion pulse width modulation (PWM) and full digital signal
processing (DSP) control.
As shown in Figure 1, input mains is converted to d.c., which in turn feeds a d.c./d.c. battery charger and
an inverter. The inverter then converts the battery voltage to a clean a.c. source, output-independent of
the input. The battery powers the load through the inverter in case of an input mains power failure.
If the inverter is unable to supply power for any reason the load is supplied via the bypass circuit, which
includes the bypass input breaker and the static transfer switch (STS).
If maintenance or repair is necessary the UPS can supply the load via the internal and manually
controlled maintenance bypass breaker. With the exception of the maintenance bypass breakers (internal
and external) all the breakers shown are closed during normal UPS operation.
Mains
supply
Output
breaker
Manual
maintenance
breaker Output
REC/PFC Inverter STS
Input
breakers
UPS
Bypass
supply
External bypass (recommended)
Battery
breaker
Battery
Figure 1 Single unit block diagram
An external bypass breaker enables a UPS to be replaced without interrupting the load and is
recommended in most installations.
Split bypass input
Figure 1 shows the UPS in what is known as the ‘split bypass’ configuration, in which a separate input
supply (the bypass supply) feeds the internal bypass circuits instead of the mains supply. In this
configuration the link (dotted line) between mains and bypass supply is removed.
Static transfer switch
The static transfer switch (STS) is a power-electronic circuit. During normal operation the load is supplied
via the inverter, however in the event of a UPS overload or inverter failure, the STS transfers the load
automatically to the bypass circuit. To provide a clean (no-break) load transfer between the inverter
output and bypass line, the inverter output is synchronized to the bypass supply during normal operating
conditions.

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Battery temperature compensation
Using optional external battery temperature sensors the UPS is capable of optimising the battery charger
output to enhance battery life and performance. This is a non-standard feature that must be purchased
separately. Contact your distributor for details.
Redundant control power supply board
The UPS is equipped with two identical and fully redundant control power supply boards. Each board is
powered by the input a.c. and battery d.c. Therefore, if one of these sources or even if a board fails the
UPS continues to operate normally. This feature further enhances the reliability of the system.
Single phase outlet
A 250 Va.c. 5 A single-phase fused outlet is provided on the front panel. This supply is generated from
the battery, independent of other UPS power circuits, and can be used for ease of testing, commissioning,
and servicing. This output is accessible when the cabinet door is open.
250VAC 5AFUSE
Multi-unit operation
Up to four units can be operated in N+X parallel mode to provide additional power or higher reliability. In
this configuration the load is shared equally between the units.
It is also possible to operate with load bus synchronisation (LBS), which allows the load to be transferred
seamlessly between two UPS systems. Each system can be a single UPS or a parallel group of units.
Multi-unit operation is enabled by:
Hardware and firmware built into each UPS, controlled by software settings.
Parallel control cables, connected in a ring to enhance reliability. Dual-bus control cables are
connected between any two UPS modules of each bus. The intelligent paralleling logic provides the
user with maximum flexibility. For example, shutting down or starting up UPS units in a parallel
system can be done in any sequence. Transfers between Normal and Bypass modes of operation
are synchronised and self-recovering.
The total load of a multi-unit system can be queried from each unit’s LCD display.

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Installation
Siting considerations
Before unpacking and installing the unit, consider the following:
DONOT expose the UPS to high temperatures, water ingress, flammable or corrosive gas, dust, direct
sunlight or explosives.
Locate the UPS indoors on a level surface as close as possible to the equipment it will be powering to
minimise cable voltage drops. If required, allow enough spare cable to move the UPS after
installation.
Maintain a gap of at least 50 cm from walls or other equipment, and ensure the ventilation holes/slots
at the front and rear of the units are not obstructed.
For improved product reliability ensure cool air is available at the front of the unit.
Battery location. We recommend you site batteries in a separate room to maintain the optimum
working temperature of between 15°C and 25°C. As an approximation, battery life is halved for every
10K (10°C) rise in temperature.
Wiring considerations
To ensure a safe installation please follow these instructions and the local electrical code of the area or
country in which you are installing the equipment:
If the UPS is to be supplied from a local transformer, ensure the transformer kVA rating is at least
50% greater than the UPS output kVA rating and the output is 4-wire star configuration.
Use circuit breakers and cables with the correct rating (see the next section).
Always fit an MCB between the mains supply live lines only and the UPS input (see Figure 2).
Caution:
Do not fit an MCB in the neutral line.
Because of the high leakage current (see Earth leakage current below), permanently hard wire all the
a.c. cables.
Fit ring terminal crimps on the ends of all cables that fasten to studs (see Cable sizes on page 12).
Fit a 3 pole MCCB, with a suitable d.c. voltage rating and breaking capacity, between the battery and
the UPS (see Figure 2).
Caution:
The UPS is designed to work with a centre-tap battery only.
Although it may not be absolutely necessary, we recommend you fit an MCB between the UPS and
the load to protect the output load and cables in the event of a fault (see Figure 2). You may also wish
to connect the UPS output to your load via a power distribution unit (PDU).
Ensure correct phase rotation in the 3-phase wiring.

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UPS Load
Input
L1
N
L3
L2
E
MCB MCB
MCCB
(not MCB)
N
L1
L2
L3
E
Figure 2 Power cable wiring configuration for a single UPS
Units in parallel
A group of paralleled units behave as if it were one large UPS. To ensure units share the load equally and
the system complies with relevant wiring regulations, follow these requirements:
Use units of the same rating only and connect them to the same bypass source.
Reference the Bypass and the Main input sources to the same neutral potential.
Ensure that any RCDs (residual current devices) are appropriately set and located (see Earth leakage
current below).
Connect the outputs of all units to a common output bus.
Ensure the length and specification of power cables including the bypass input cables and UPS
output cables of each unit is the same. This ensures load sharing when operating in bypass mode.
Note: Optional isolation transformers are available for applications where sources do not share the
same neutral reference or where the neutral is not available.
Earth leakage current
The residual earth current introduced by the RFI suppression filter inside the UPS is between 3.5 mA and
1000 mA. We recommend that you verify the selectivity of the residual current detector (RCD) with all
other differential devices both upstream of the input distribution board and downstream (towards the
load).
Caution:
To avoid false alarms, locate earth leakage monitoring devices upstream of the
common neutral point when used in systems with split bypass input or when used in paralleled
UPS configurations. Alternatively use the device to monitor the combined 4-wire rectifier and
split bypass input currents.
Ensure that an RCD upstream of the UPS has these characteristics:
Sensitive to d.c. unidirectional (class A) pulses
Insensitive to transient current pulses
Average sensitivity adjustable between 0.3 and 1A
Such residual current circuit breakers (RCCB) are identified by the symbols:

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 
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Operation from a generator
As a guide we recommend that the load capacity should be less than 30% of the generator capacity, and
the generator rating should be 1.5 to 2 times the rating of the UPS, depending on the type of generator
used.
Caution:
Ensure that the neutral line from the generator is permanently connected to the
mains neutral line. Do not use an MCB or any other type of switch in this line.
Cable sizes
Use the following sizes of cables to connect the UPS between mains power, batteries and the load.
UPS rating
(kVA)
AC input / output
(mm
2
)
DC input
(mm
2
)
Ground
(mm
2
)
Busbar stud size Torque
(Nm)
20 10 25 6
Bolts: M6, holes: 6 mm
1
5
30 16 35 6
40 25 50 10
60 35 70 25
80 50 95 35
1
Most connections are made to terminal blocks, however some neutral and battery cable connections
are made to studs.
Caution:
Size the ground (earth) conductor for the a.c. supply fault rating, cable lengths and
type of protection.
External bypass and battery breakers are specified at the time of purchase.
Unpacking the UPS
To unpack the UPS:
1. Cut off the shrink wrapping carefully from around the unit.
2. Cut the straps securing the unit to the pallet, and remove the corner protection strips, disposing of
them correctly.
3. Remove and retain the documentation, CD and leads from inside the door of the UPS.
4. Dispose of packets of desiccant correctly.
5. Using a forklift truck or similar, move the UPS off the pallet.
WARNING!
TAKE CARE WHEN MOVING THE UPS OFF THE PALLET. IT WEIGHTS IN EXCESS OF
186 KG AND COULD FALL.
6. Check the appearance of the UPS to see if is damaged. If any damage is found, do not switch on the
UPS and contact your distributor.
7. Check the packing list. Contact your distributor if any of the accessories are missing.

 

 
Internal layout (door open)
Figure 3 shows the internal layout with the door open and all protective covers removed.
SNMP slot
Intelligent slot
(relay signals)
Dry contact alarms
Connector to door
display
Mains breaker
Power terminals
Bypass input breaker
Output breaker
Maintenance
bypass breaker
MODBUS
(battery monitor
connector)
RS485
port
RS232
port
Black start
button
Fused mains socket
(250VAC 5A)
Fuse
(5A)
Battery number
select jumpers
LBS port
Parallel port 1
Parallel port 2
External breaker
dry contact switches
RS485
port
Figure 3 E420, E430 and E440 internal layout
Note: E460/E480 units are taller and the E480 is fitted with larger breakers and terminals in the lower
part of the cabinet. Terminal and battery connections vary from those shown above.

 
 
   
Wiring the UPS
Before connecting the UPS, read the siting considerations above and check you have selected breakers
and cables with the correct ratings.
WARNING!
BEFORE ATTEMPTING TO WIRE THE UPS ENSURE ALL BREAKERS ARE IN THE OFF
POSITION AND WHERE POSSIBLE LOCKED OFF.
Caution:
DO NOT mix batteries from different manufacturers or mix different types of
batteries. DO NOT use old and new batteries together.
Caution:
Ensure correct phase rotation in the 3-phase wiring.
To connect the UPS to your system:
1. Unlock and open the front door of the UPS.
2. Check the external battery as follows:
a. Ensure that the number of 12 V blocks in each string (positive and negative) is equal and matches
the number specified in your order.
b. Remove the cover plate below the black start switch and check that the correct combination of
battery jumpers is fitted for the number of batteries in the system.
J1J2J3Not used
Figure 4 Example showing links fitted for 40 batteries
No of batteries J3 J2 J1
32 Not fitted Not fitted Not fitted
34 Not fitted Not fitted Fitted
36 Fitted Not fitted Fitted
38 Not fitted Fitted Fitted
40 Fitted Fitted Fitted
c. Measure the battery voltage in each string, which should be approximately 192 Vd.c. for 16
batteries, 204 Vd.c. for 17 batteries, 216 Vd.c. for 18 batteries, 228 Vd.c. for 19 batteries and 240
Vd.c. for 20 batteries.
3. Remove the lower cover to gain access to the breakers and terminals.
4. Feed all cables through the bottom of the unit, moving the securing plate as needed. If the unit is part
of a parallel system, fit the parallel cables before the main power cables.
Caution:
Where terminal blocks are not available for connections, fit ring crimps to the
ends of cables. This is the case for the E480 battery cables.

 

 
5. Wire the input and output earth cables to the PE (protective earth) terminals. Ensure that both
connections are made.
Battery 1 Battery 2 Main input Bypass input
(split bypass
systems only)
Output
BAT+BAT− BAT− L1 L2 L3 L1 L2 L3BAT+PE L1 L2
N N
PEL3
Figure 5 Cable connections for E420, E430, E440 and E460 units
Input Output
BAT+
BAT
L1A L1B L2A L2B L3A L3B
PE L1 L2
N N
PEL3
Links removed in a split bypass system
Battery centre tap
Battery
Figure 6 Cable connections for E480 units
6. Wire output and battery cables to the terminals as shown in the appropriate diagram above. On E480
units, feed the battery centre-tap cable round the back of the terminal block and wire it to the top of
the left-hand neutral terminal as shown above.
7. Wire the input as follows: E420/E430/E440/E460: to Main input (Figure 5)
E480: to L1A, L2A, L3A (Figure 6)
8. Secure all cables to the punched plate in the bottom with cable ties.

 
 
   
9. If your UPS is configured for split bypass operation:
a. Check the following: E480: that the links in Figure 6 have been removed.
E420/E430/E440/E460: that the short breaker links are fitted (Figure 7).
Shortened breaker links
Figure 7 E420, E430, E440, E460 breakers linked for split bypass operation
b. Wire the split bypass input as follows:
E420/E430/E440/E460: to Bypass input (Figure 5)
E480: to L1B, L2B, L3B (Figure 6)
WARNING!
CHECK THAT ALL CABLES ARE WIRED TO THE CORRECT TERMINALS. DO NOT
REVERSE THE INPUT LIVE AND NEUTRAL CONNECTIONS OR THE POLARITY OF
ANY OF THE BATTERY CABLES.
10. If your unit has an SNMP card fitted or you plan to use the RS232 port or other standard signals, see
Appendix 1 Signals options on page 35.
11. Close and lock the front door.

 

 
Wiring units in parallel
You can operate 2, 3 or 4 units in parallel.
Caution:
Each unit requires its own battery bank. You cannot use a common battery bank for
more than one unit working in parallel mode.
When operating units in parallel you must not use the built-in bypass as it is rated for one unit
only. If you need a bypass for the parallel system it must be wired as an external item.
WARNING!
BEFORE ATTEMPTING TO WIRE THE UNITS, ENSURE ALL BREAKERS ARE IN THE OFF
POSITION.
To connect two or more units in parallel:
1. Wire the power cables and optional signals as described above.
2. If a system bypass is required, wire in a separate MCB capable of carrying the total system load
current as shown below. This is not required if you have only two units working in N+1 mode and the
load never exceeds the rating of a single unit.
Battery
breaker
Battery
UPS 1
Input
mains
supply
Bypass
mains
supply
Battery
breaker
Battery
UPS 2
Input
mains
supply
Bypass
mains
supply
Battery
breaker
Battery
UPS 3
Input
mains
supply
Bypass
mains
supply
Input distribution
Output Output Output
Distribution panel
Load
W rap-around
(maintenance)
bypass supply
Figure 8 Units connected in parallel

 
 
   
3. Below the black start switch on each UPS, remove the plate that covers the parallel connectors.
4. Connect the CAN bus, labelled Parallel Port 1 and Parallel Port 2, in a ring arrangement using the
supplied cables as shown below. Make sure you wire all CAN bus connectors and secure them in
place using their captive screw locks.
Parallel Port 1 Parallel Port 2 LBS
UPS 1
Parallel Port 1 Parallel Port 2 LBS
UPS 2
Parallel Port 1 Parallel Port 2 LBS
UPS 3
5. Replace the protective cover to protect the CAN bus cables against accidental removal.
6. Optional connection. You can control and monitor all units using the RS232 port on one UPS. To do
this, connect the RS485 socket of one unit to RS485 socket of the next unit and so on until all units
are connected in a daisy-chain as shown below.
Note: Do not connect the units in a loop.
Modbus
RS232
RS485 RS485
UPS 1
SNMP
Modbus
RS232
RS485 RS485
UPS 2
SNMP
Modbus
RS232
RS485 RS485
UPS 3
SNMP
7. If required, wire the LBS (load bus synchronisation) connection as described on page 40.
8. If required, wire a remote emergency power off (EPO) switch as described on page 40.

 

 
Operation
Working modes
The UPS has the following modes of operation:
On-line mode
Battery mode
Auto-restart mode
Bypass mode
ECO mode
Frequency converter mode
Each operating mode is described below.
On-Line mode
This is the default mode of operation in which the load is supplied via the inverter when the a.c. input and
load are within their normal ranges. The battery is trickle charged in this mode.
During fault conditions the UPS automatically switches to either bypass mode or battery mode without
interruption of power to the load.
Battery mode
In battery mode the load is supplied from the battery via the inverter, the UPS beeps every 3 s, and the
rectifier and charger are turned off. The UPS switches to battery mode when there is no a.c. input or the
a.c. input is outside its normal range. On the front panel the Mains LED if off and the Battery LED is on.
When the battery reaches a pre-set low limit, the system gives a low battery voltage alarm signal, the
LCD provides a low battery alarm, and the UPS beeps every second. Eventually the UPS shuts down to
prevent damage to the batteries.
When the a.c. mains is restored the inverter starts automatically and the UPS reverts to on-line mode. If
you turn off the UPS in battery mode it restarts in bypass mode and you must press the INVERTER ON
button to start the inverter.
Auto-restart mode
Following an extended a.c. mains failure the battery will become exhausted. When the battery reaches
the end of discharge (EOD) voltage the inverter shuts down and no more power is supplied to the load.
By default the UPS remains shut down after EOD. However it can be programmed to automatically restart
after a time delay. This is normally done by the commissioning engineer.
Bypass mode
In bypass mode the load is supplied directly from the a.c. mains input and the battery is charged. The
UPS switches to bypass mode when any of the following conditions occur:
An output overload – the unit beeps twice every second, indicating that the load must be reduced to
within its normal range as soon as possible. Once the overload is removed the inverter re-starts after
a 5 minute delay. If the UPS is overloaded too many times in any one hour it will eventually remain in
bypass mode.
The UPS is too hot – the UPS reverts to on-line mode as soon as the unit temperature returns to
normal.
The UPS fails – a serious fault has occurred within the UPS that must be repaired.
The UPS inverter is turned off.
In bypass mode the Inverter LED is off and the Bypass LED is on.

 
 
   
ECO mode
If specified, your UPS may be set to operate in ECO mode instead of on-line mode. In ECO mode the
load is supplied via the bypass circuit and not the inverter, allowing the UPS to work at higher efficiency.
The battery is trickle charged in this mode. If the a.c. input is lost or goes beyond its normal range the
UPS automatically switches to battery mode, however, the transfer speed is slower than on-line mode
and may not be suitable for all applications.
Frequency converter mode
The UPS can be programmed to work as a frequency converter to provide either a 50 or 60 HZ a.c.
output voltage. In this mode static bypass operation is disabled and the UPS may operate in battery
mode.
Before switch on
Before turning on the unit for the first time or after any wiring or battery changes:
1. Read the section above on working modes.
2. Check all the wiring.
3. Check that the rated load does not exceed the rated output of the UPS.
4. If the UPS is supplied by a generator, check that the generator is correctly rated and wired (see
Operation from a generator on page 11).
5. Apply the wheel locks and screw down the feet to prevent the UPS from moving.
Switching on the UPS
Note: It is important to switch on your UPS as described below as damage may occur when supplying
certain load types.
Caution:
When using the UPS for the first time, charge the batteries for at least 8 hours as
they may have lost charge during the time between production and installation.
To switch on the UPS:
1. Ensure all UPS breakers are switched off.
2. Switch on the battery breaker.
3. Switch on the distribution breaker (including a split supply breaker if this is in use).
4. Switch on the UPS bypass and output breakers. The Bypass and Output LEDs are illuminated. You
should immediately hear the fans start up
The LCD should begin to work. The model number and working mode is initially displayed on the front
panel LCD. After a few seconds this changes to system information.