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GE Industrial Systems
Digital Energy
Uninterruptible Power Supply
350-500-700-1000 VA
™
ML Series
Manufactured by:
GE Digital Energy
General Electric Company Telephone +41 (0)91 / 850 51 51
CH – 6595 Riazzino (Locarno) Fax +41 (0)91 / 850 51 44
Switzerland Website www.gedigitalenergy.com
ML Series UPS
Technology for the Digital World.
ver 1.1 - GB
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GE Digital Energy™ ML Serie
GB
USER MANUAL
Digital Energy™ ML Series
Uninterruptible Power Supply
Uninterruptible Power Supply
Uninterruptible Power SupplyUninterruptible Power Supply
350
350----500
500----700
700----1000 VA
350350
500500
Please read these instructions carefully before installation and start-up of the Digital
Energy™ ML Series UPS. Keep this manual in a safe place for future reference.
CONTENTS
1 INTRODUCTION ........................................................................................... 2
1.1 Introduction
1.2 Safety Rules
1.3 Transport / Storage
2 INSTALLATION ............................................................................................. 2
2.1 Installation Rules
2.2 Installation Procedure
3 OPERATION.................................................................................................. 4
3.1 Start-up
3.1.1 Start-up, mains available
3.1.2 Start-up, mains not available (‘battery start’)
3.2 Use: Normal Operation
3.2.1 Normal operating conditions
3.2.2 Self test
3.2.3 Auto-off (no-load shutdown)
3.2.4 Switching off
3.3 Use: Status and Alarm Indications
3.3.1 Charger on
3.3.2 Normal operation
3.3.3 On battery
3.3.4 Battery low
3.3.5 Replace battery
3.3.6 Overload
3.3.7 Self test
4 COMMUNICATION........................................................................................ 6
5 MAINTENANCE............................................................................................. 7
5.1 General
5.2 Fuses
5.3 Batteries
5.3.1 General
5.3.2 Battery replacement
6 TROUBLESHOOTING .................................................................................. 8
7 SPECIFICATIONS......................................................................................... 9
© General Electric. All rights reserved; reproduction without permission prohibited. This manual may be subject to change; no
liability can be accepted for any error or omission.
700700
1000 VA
1000 VA1000 VA
OPM_MLE_LTE_350_1K0_1GB_V011 1 DE ML Series: user manual 1.1 (GB)
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1 - Introduction
GE Digital Energy™ ML Serie
1.1 Introduction
The GE (General Electric) Digital Energy™ ML Series UPS, an uninterruptible power supply, protects
your equipment from all forms of power interference, including complete power failures.
1.2 Safety Rules
• CAUTION: RISK OF ELECTRICAL SHOCK. The UPS contains batteries. The
appliance outlets may be electrically live, even when the UPS is disconnected from the
mains.
• The UPS contains potentially hazardous voltages. Do not open the UPS, there are no
user serviceable parts inside.
• Apart from battery replacement on the ML 350/500/700 models, all maintenance and
service work should be performed by qualified service personnel.
• Always isolate the UPS from the mains during battery replacement.
1.3 Transport / Storage
• No liability can be accepted for any transport damage when the equipment is shipped in non-
original packaging.
• Before storing, charge the batteries for at least 24 hours.
• Store the UPS in a dry location, storage temperature must be within -20 +45 °C. If the unit is
stored for a period exceeding 3 months, optimal battery lifetime is obtained if the storage
temperature does not exceed 25°C. Be sure that the UPS is switched off, and that no cable is
connected to the interface port.
• If the unit is stored for a period exceeding 3 months, the batteries must be recharged
periodically. Connect the unit to a wall outlet for a period of approx. 48 hours, minimum every 3
months.
2 - Installation
The shipping box contains a Digital Energy™ ML Series UPS, a power cord, a computer interface
cable, a CD ROM and this manual. After unpacking, inspect the UPS for damage. If you find any damage
please immediately notify the carrier and place of purchase.
IMPORTANT:
Before making any connection and switching on the Digital Energy™ ML Series UPS, please check the
following conditions:
• your mains supply is 220 - 240 Volts and 50 Hz, and
• the total power demand of the connected equipment does not exceed the rated output power of
the UPS (indicated on the rear panel).
2.1 Installation Rules
• The UPS is intended to be used in normal domestic and office situations.
• Protect the UPS, according to the wiring rules, with a 16A D-type fuse.
• The UPS must be powered from a single phase grounded wall outlet. Do not use extension
cords.
• Avoid locations that are excessively humid, near water, near heat sources or in direct sunlight.
• The ambient temperature should not exceed 40°C. Optimal battery lifetime is obtained if the
ambient temperature does not exceed 30°C.
• It is important that ventilation air can move freely around and through the unit. Do not block the
air vents.
• Do not plug appliances such as electric heaters, toasters and vacuum cleaners into the UPS.
The UPS output can be used only for electronic loads such as computers and
telecommunications equipment.
• Be careful when connecting laser printers: be sure that the demanded power does not exceed
the capacity of the UPS.
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2.2 Installation Procedure
1. Switch off your computer, and unplug it from the
socket-outlet.
2. Disconnect the power cord from the computer (rating
250Vac/10A) and connect this cord to the male input
socket (2) at the rear of the UPS (figures on the right
show simplified ML 350-700 model).
3. Using the output cord provided, connect the computer
to the appliance outlets (3) of the unit.
4. Connect the mains cord of the UPS to a working,
grounded AC wall socket outlet. The green LED
'LINE' will blink now: mains power is available and the
batteries are charging.
5. For best results, allow the UPS to recharge the
batteries for a period of approx. 10 hours. It is
acceptable to use the UPS without first charging the
battery, but the runtime may be reduced.
6. For advanced communication possibilities, the RS232
interface port (4) can be connected to a computer
system. See chapter 4.
ML 350-700 ML 1000
GE Digital Energy™ ML Serie
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3 - Operation
3.1 Start-up
3.1.1 Start-up, mains available
1 Press keypad 'ON' for 2 seconds
LED ‘LINE’ (already blinking) will illuminate continuously now.
2 The equipment connected to the UPS can now be switched on.
3.1.2 Start-up, mains not available (‘battery start’)
If the mains input is absent (power cord not connected, or mains failure):
1 Press keypad 'ON' for 2 seconds until LED ‘BAT’ illuminates.
The UPS operates on battery: it discharges the batteries.
3.2 Use: Normal Operation
3.2.1 Normal operation conditions:
• the mains supply is present,
• the UPS is on,
• the load does not exceed the capacity of the UPS and
• the operating temperature is below alarm level.
AVR (Automatic Voltage Regulation):
If the quality of the incoming mains is poor, the AVR boosts a low incoming voltage or reduces a
high one. The load receives a voltage within the normal range (see chapter 7).
3.2.2 Self test (UPS operation and battery condition)
In case of a system failure the output voltage can be lost. It is therefore recommended to switch
off the load before performing a self test. See chapter 6.
1 During normal operation, press keypad 'ON' for 2 seconds.
2 If the battery does not pass the self test, a ‘replace battery’ alarm is given. See 3.3.
3.2.3 Auto-off (no-load shutdown)
When mains is not available (mains failure or battery start) the UPS will switch off when the load
is less than 5% of the maximum load. In this way unnecessary discharging of the batteries is
avoided. The unit will automatically turn on again when mains power is restored. The no-load
shutdown function cannot be de-activated.
3.2.4 Switching off
1 Press keypad ‘OFF’ for 2 seconds.
2 If electric isolation is required, unplug the power cord from the wall outlet.
GE Digital Energy™ ML Serie
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GE Digital Energy™ ML Serie
3.3 Use: Status and Alarm Indications
o status indications the operating mode
! low priority alarms abnormal operating situations
!! high priority alarms situations in which the actual output voltage of the UPS is no longer
guaranteed; immediate action should be taken
SITUATION LINE BAT BUZZER
Charger on
O
(3.3.1)
Normal
O
operation
(3.3.2)
On battery
!
(3.3.3)
Battery low
!!
(3.3.4)
Replace
!
battery (3.3.5)
Overload on
!!
mains (3.3.6)
Overload on
!!
battery (3.3.6)
Self test
O
(3.3.7)
Mains on.
UPS output off
Mains on.
UPS output on
Mains off or abnormal, UPS
output on
UPS on battery, battery
under drained condition
Mains on, UPS output on.
UPS has failed to pass the
previous self test
Mains on, output power >
105% of the rated capacity.
Mains off or abnormal,
Output power > 105% of the
rated capacity.
Mains on, unit switches to
battery mode for 6 secs to
check the bat. condition
Green blinking
1x /sec
Green on
Green on
(mains mode)
Green blinking
1x /sec
(standby mode)
Green on Continuous
Red on Continuous
Green on Red on
Red on
Red on
blinking
1x /30 sec
Operating modes and corresponding indications, see 3.3.1 – 3.3.7.
* Reset Buzzer alarm: Press keypad ‘ON’ for 2 seconds.
Only the actual buzzer is muted; a next alarm re-activates the buzzer.
A buzzer reset does not affect the computer interface alarm.
3.3.1 Charger on
Mains on, UPS output off, the batteries are charging.
3.3.2 Normal operation
Mains on, UPS output on, see also 3.2.1.
Beeps
1x /4 sec
Beeps
1x /sec
Red
Beeps
1x /30 sec
RESET
BUZZER
Possible*
Not
possible
Not
possible
Not
possible
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3.3.3 On battery
3.3.4 Battery low (end of autonomy)
3.3.5 Replace battery
3.3.6 Overload on mains/battery
3.3.7 Self test
The UPS uses the energy stored in the batteries: see chapter 7 ‘Batteries - autonomy’.
The UPS will shutdown
• after the batteries have been discharged (automatic restart), or
• if keypad 'OFF' is pressed for >2 seconds (manual restart required) or
• if a 'UPS shutdown' command is given by the computer (automatic restart).
The batteries are nearly discharged. Controlled shutdown of your computer equipment should be
completed within 1 minute.
The battery is bad. Perform the self test again (see 3.3.7) to confirm the ‘replace battery’
condition. The alarm only goes out after the next self test: if the battery has either been
sufficiently charged (discharged battery) or replaced by a new one (worn out battery). See also
5.3.
The demanded power of the equipment exceeds the UPS's rated output power. If the load
exceeds 150% of the rated power:
• during battery operation, the UPS output will be switched off immediately
• during mains operation, the UPS output will be switched off after 30 seconds.
The self test can be started manually: when the UPS operates in mains mode press the ‘ON’
button for 2 seconds. During the test the unit will switch to battery operation for 6 seconds to
check the battery condition. After 6 seconds the unit will switch back to normal operation: mains
mode. See also 3.2.2.
4 - Communication
GE Digital Energy™ ML Serie
The RS232 port is a plug-in interface port (4-pin, RJ-11, 4P-4C) which enables advanced communication
between the UPS and the computer. Use UPS software for unattended operation of workstations, power
quality related data logging, shutdown notification and control, auto-restart, diagnostics, and battery
conservation features.
We strongly recommend using only original GE Digital Energy™ software in combination with the
RS232 interface port.
For specific information on GE Digital Energy's connectivity products please contact your local dealer or
Internet: www.gedigitalenergy.com
The communication port is available as long as the UPS is ON.
Pin # Function
1 Tx
2 Rx
3 No connection
4 GND
RJ-11 4P-4C
ML 350-700 ML 1000
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5 - Maintenance
GE Digital Energy™ ML Serie
5.1 General
The UPS is virtually maintenance free: take care of proper environmental conditions and keep air inletsoutlets free of dust. Please read 2.1.
5.2 Fuses
If the AC input fuse (1) is defective, be sure it is replaced by a compatible fuse from the same make and
type. Fuse ratings: see chapter 7.
5.3 Batteries
5.3.1 General
The service life of the battery is up to 6 years.
As a healthy battery is critical to the UPS, keypad 'ON' allows a battery test (3.2.2). When the condition of
the battery is critical, a 'replace battery' alarm will be given (see 3.3). Charge the batteries for at least 10
hours, switch the UPS off and back on, and perform a self test. If the alarm persists replace the batteries
as soon as possible.
5.3.2 Battery replacement
• Warning: first read the safety rules in section 1.2.
• When replacing the batteries, use the same number and voltage(V)/capacity(Ah).
• Proper disposal or recycling of the batteries is required. Refer to your local codes for disposal
requirements.
• Never dispose of batteries in a fire: they may explode.
• Do not open or mutilate batteries: their contents (electrolyte) may be extremely toxic. If exposed to
electrolyte, wash immediately with plenty of water.
• Avoid charging in a sealed container.
• Never short circuit batteries. When working with batteries, remove watches, rings or other metal
objects, and only use insulated tools.
Battery replacement procedure (ML 350/500/700)
NOTE: This procedure refers to the ML 350/500/700 models only. The batteries of the ML 1000 are not
user replaceable, please contact your dealer.
1 press keypad “OFF’ and remove the UPS input power cord from the AC mains supply
2 remove UPS front panel (two screws on bottom side)
3 pull out the battery and disconnect the battery wires
4 connect the new battery (black -, red +); small sparks can occur, this is normal
5 reinstall the new battery, do not pinch or clamp the wires
6 reinstall UPS front panel.
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6 - Troubleshooting
GE Digital Energy™ ML Serie
Whenever a malfunction occurs, first check external factors (e.g. connections, temperature, humidity or
load) to determine whether the problem is caused by the unit itself or by its environment. Subsequently
check the input fuse: it may be blown. If so: replace the fuse (see 5.2) and be sure that the UPS is not
overloaded.
The following chart is a simple troubleshooting checklist only. If the suggested solution does not succeed,
or if the information is insufficient to solve the problem, please contact your dealer or consult
www.gedigitalenergy.com.
PROBLEM POSSIBLE CAUSE SOLUTION
Blown input fuse Output overload Reduce load, replace fuse
System failure Please contact your dealer or
consult www.gedigitalenergy.com
No output voltage during self
test (3.2.2)
Only battery start possible Blown input fuse See above
No communication between
computer and UPS
System failure Please contact your dealer or
consult www.gedigitalenergy.com
Computer interface problem Check interface cable and
attached computer.
Blown input fuse See above UPS operates on battery
though mains is present
Continuously sounding
buzzer
mains present
Continuously sounding
buzzer
mains not present
UPS does not provide the
expected back-up time, no
alarm ‘replace battery’
Blinking LED ‘BAT’,
intermittent buzzer
UPS output switches OFF Battery depleted during mains
Very high, low or distorted
mains voltage
UPS overload Reduce load
UPS overload in battery mode Reduce load
Weak battery: recent outage or
worn out battery
Battery test just after
installation or mains failure
Weak battery Read 5.3
failure: end of runtime
Load is less than 5% of rated
output and no mains power is
present (no-load shutdown
function is active)
Check mains voltage, contact
qualified electrician
Charge the battery. If the battery is
near the end of its service life,
consider replacing the battery
even if the ‘replace battery’ alarm
is not yet active.
Allow the UPS to recharge the
batteries
Wait until mains returns
Wait until mains returns
Load is more than 150% of
rated output
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ML Series model : 350 500 700 1000
7 - Specifications
GE Digital Energy™ ML Serie
Ratings
Voltage Amperes (VA) / Watts (W) : 350 / 210 500 / 300 700 / 420 1000 / 600
Input
AC input voltage (Vac) : 220 - 240
AC input voltage window (Vac) (mains) : 140 - 300V 140 - 300V 140 - 300V 160 - 265V
Maximum AC input voltage (Vac) : 350
Minimum start-up AC voltage (Vac) : 150 150 150 170
Input frequency (Hz) : 50
Input frequency range : nominal ± 10 %
Typical no-load power consumption,
normal operation (W) : 12 12 27 27
AC input current (A) : 2.5 3.6 5 6.3
AC input fuse (A) : 5 5 6.3 10
Output
AC output voltage (Vac) : 230 (suitable for 220-240 Vac loads)
AC output voltage tolerance : nominal ± 5% (before battery low)
Output frequency (Hz) : 50
Output frequency stability (Hz) : < ± 0.1 (battery operation)
Output waveform : step sine wave
Power factor : 0.6 (0.7 at 90% load)
Transfer time (ms) : typically 4, max 10
Buck/Boost voltage regulation : if the input voltage is within the input voltage window,
the output voltage varies between 198-265Vac
Batteries (ratings given for 25°C)
Nominal voltage (Vdc) : 12 12 24 24
Number x capacity (Ah) of batteries : 1x5 1x7 2x5 2x7
Type : 12Vdc, sealed lead acid, maintenance free
Service life : up to 6 years (depending on use)
Recharge current (A) : 0.5 0.7 0.5 0.7
Battery recharge time for 80%
capacity (hours, approximation) : 3
Runtime in minutes
VA / Watts
100/ 60 25 40 60 85
350/210 3 8 14 24
500/300 - 3 7 11
700/420 - - 3 7
1000/600 - - - 3
General
Weight (kg) : 6.5 7.5 11 13
Dimensions (hxwxd, mm) : 150x110x300 150x110x420 150x110x450
Enclosure / protection : steel-plastic / IP20
Colour (operating panel / case) : RAL 9006 (aluminium) / RAL 7035 (light grey)
Environment
Safety : EN 50091-1-1 (EN 60950)
Electromagnetic compatibility : EN 50091-2
Ambient temperature : -10 to +40°C;
Sound at 1 meter : < 35 dB(A)
Maximum relative humidity : 95% (non-condensing)
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