Lehner Lifttechnik SIGMA User manual

User manual
Vertical platform lift "Sigma”
Version: September 2022
Lehner Lifttechnik GmbH
Salling 8
4724 Neukirchen am Walde
Austria
Tel.: [phone]
Fax.: [phone]
Email: [e-mail]
Web: www.lehner-lifttechnik.at

Sigma | User Manual Version 09/2022
CONTENT
1Introduction............................................................................................................................................................................. 1
2Attention - safety first...........................................................................................................................................................2
2.1 Signs and symbols used ............................................................................................................................................2
2.2 Platform lift operator ..................................................................................................................................................3
2.3 User group.....................................................................................................................................................................3
2.4 Range of application...................................................................................................................................................3
2.5 Skilled workers..............................................................................................................................................................3
2.6 Decommissioning........................................................................................................................................................3
2.7 Intended use .................................................................................................................................................................4
2.7.1 Safety instructions ..................................................................................................................................................4
2.7.2 Use of the platform lift..........................................................................................................................................5
3Technical equipment ............................................................................................................................................................6
3.1 Schematic representation .........................................................................................................................................6
3.2 Technical specifications..............................................................................................................................................7
4Safety devices of the Sigma................................................................................................................................................8
4.1 Travelling platform door............................................................................................................................................8
4.2 Safety floor ....................................................................................................................................................................8
4.3 Contact strip upward acting.....................................................................................................................................8
4.4 Overload device...........................................................................................................................................................8
4.5 Emergency stop ...........................................................................................................................................................8
4.6 Alarm button.................................................................................................................................................................8
4.7 Overspeed governor and safety gear ...................................................................................................................8
4.8 Battery charging system ............................................................................................................................................9
5Controls ..................................................................................................................................................................................10
5.1 Call points at bus stops............................................................................................................................................10
5.2 Platform controls ........................................................................................................................................................11
5.3 Hinged doors manual/automatic .........................................................................................................................12
6Operating the platform......................................................................................................................................................13
6.1 Calling the platform ..................................................................................................................................................13
6.2 Opening the swing door and driving on the platform...................................................................................13
6.3 Driving with the platform ........................................................................................................................................14
6.4 Leaving the platform ................................................................................................................................................14
7Troubleshooting...................................................................................................................................................................15
7.1 General .........................................................................................................................................................................15

Sigma | User Manual Version 09/2022
7.2 Error table....................................................................................................................................................................16
8Liberation of a passenger..................................................................................................................................................17
8.1 Emergency operation...............................................................................................................................................17
8.2 Emergency release of hinged doors....................................................................................................................18
8.3 Recovery of a wheelchair user.............................................................................................................................. 20
9Control and maintenance .................................................................................................................................................21
9.1 Security checks ...........................................................................................................................................................21
9.2 Cleaning .......................................................................................................................................................................21
10 Maintenance/verification.................................................................................................................................................. 22
10.1 Review.......................................................................................................................................................................... 22
10.2 Maintenance instructions ....................................................................................................................................... 22
10.2.1 Platform controls ............................................................................................................................................ 22
10.2.2 Swing doors ..................................................................................................................................................... 23
10.2.3 Safety floor and contact strips.................................................................................................................... 23
10.2.4 Safety gear / overspeed governor............................................................................................................ 23
10.2.5 Chains ................................................................................................................................................................ 23
10.2.6 Trolley wheels.................................................................................................................................................. 23
10.2.7 Attachment of the drive tower and platform......................................................................................... 23
10.2.8 Mechanical switches ...................................................................................................................................... 23
10.2.9 Gearbox and engine...................................................................................................................................... 23
10.2.10 Signalling equipment .................................................................................................................................... 23
10.2.11 Documents / Emergency release key....................................................................................................... 24
10.3 Lubricants and operating materials, spare parts............................................................................................. 24
10.3.1 Lubricants and operating fluids.................................................................................................................. 24
10.3.2 Spare parts ....................................................................................................................................................... 24
11 Construction......................................................................................................................................................................... 24
11.1 Installation / Repair .................................................................................................................................................. 24
11.2 Dismantling and disposal ....................................................................................................................................... 24
12 CE Declaration of Conformity ......................................................................................................................................... 25
13 Duties of the platform lift operator ............................................................................................................................... 26
14 Requirements for the maintenance company ........................................................................................................... 27
15 Assembly and maintenance records............................................................................................................................. 28

Sigma | User Manual Version 09/2022 Page 1
1INTRODUCTION
We would like to congratulate you on your purchase of a platform lift from Lehner Lifttechnik
GmbH and welcome you to our large circle of satisfied customers. For more than 30 years, our lifts
have been known as reliable means of transport, which are characterised by individual adaptation
to structural conditions.
The Sigma platform lift represents a new generation of platform stairlifts with proven technology.
The lift has been built according to the currently valid European safety rules.
As with any appliance that works under load and whose parts are in motion, the utmost
attention is required. Please read this user manual carefully. Make sure that every user of
the lift has read and understood the user manual before using the lift. You will find
instructions for operating the unit as well as safety instructions.
Use these instructions to benefit from Lehner Lifttechnik's many years of experience in the
operation of accessibility lifts. Proper care of the system on your part as well as scheduled
maintenance by a competent company will provide you with a reliable lift system over a long
period of time.
Lehner Lifttechnik GmbH and its authorised partner companies offer you a comprehensive
maintenance programme specifically for your installation. Take advantage of the manufacturer's
experience to achieve the highest possible efficiency for your lift system.
Keep these operating instructions for future reference.
Lehner Lifttechnik GmbH expressly rejects any liability for breakdowns caused by disregard of these
instructions, non-compliance with the safety instructions or incorrect handling.
We hope you enjoy using the Sigma platform lift!

Sigma | User Manual Version 09/2022 Page 2
2ATTENTION - SAFETY FIRST
This manual also contains instructions for emergencies. It must therefore be ensured that this manual
is always available at the installation and kept accessible to the operator, lift attendant, rescue and
maintenance personnel.
Please carefully observe the following points/regulations:
2.1 Signs and symbols used
The following signs enable you to become aware of important points immediately. This makes it
much easier to use the operating instructions.
All passages marked with this sign require special attention. They are notes for
smooth operation or important recommendations.
Warning: In the case of text passages with this sign, failure to observe the procedure
indicated may lead to dangerous situations, causing personal injury or damage to
property. Therefore, read these points with special care.
Text passages with this symbol refer to actions that must not be carried out under
any circumstances. In case of non-observance, there is immediate increased danger,
whereby personal injury or damage to property may occur.
All pictures, photos and drawings used in this manual are symbolic only and may
differ from reality.
Image
Photo

Sigma | User Manual Version 09/2022 Page 3
2.2 Platform lift operator
At least one responsible person must be appointed for each platform lift; this person must be easily
reachable during the operating time of the installation. The installation must be maintained in a safe
condition. If the system is found to be unsafe, it must be taken out of service immediately; danger
zones must be secured. Accidents must be reported immediately to the expert (lift inspector or
installation company) or the manufacturer.
The person in charge must make sure on a weekly basis that there are no obviously dangerous
operational defects and that the tasks listed in the chapter "Duties of the platform lift operator" are
being carried out carefully.
2.3 User group
The platform lift may only be used by competent, qualified and responsible persons who are familiar
with the system. The user must be able to assume responsibility for himself and for third parties.
Persons who do not meet these requirements, as well as children, may only be transported by
accompanying persons who also assume responsibility for the person being transported.
2.4 Range of application
The platform lift may only be used on stairs or accessible ramps. It is recommended to install the
system in predominantly dry rooms. The ambient temperature must not be below -15 °C or above
+ 40°C. This type is not suitable for use in unusual locations (e.g. explosive areas, areas with
aggressive media, etc.).
Outdoor use is possible in principle, however, in the case of outdoor installations that are exposed
to the weather, it may be necessary to clear parts of the installation of ice and snow in winter on a
case-by-case basis.
2.5 Qualified workers
Installation, maintenance, repairs and checks must be carried out by qualified persons, preferably by
companies authorised by Lehner Lifttechnik.
2.6 Decommissioning
When the unit is taken out of service for cleaning, maintenance or repair work, it must be protected
against unintentional movement. The key switches on the call stations must be switched off and the
keys removed.

Sigma | User Manual Version 09/2022 Page 4
2.7 Intended use
Preventive checks and regular maintenance of the unit are highly recommended and will guarantee
you long-term, safe operation.
2.7.1 Safety instructions
Observe the following points for correct use:
▪The platform lift is built to transport physically disabled persons with wheelchairs, as
well as persons standing on the platform.
▪The platform lift is not intended for transporting goods.
▪Always lock the platform lift so that it cannot be operated by unauthorised persons
(e.g. children playing).
▪Adhere to the specified maximum loads and observe the available platform size.
▪Observe instructions attached to the unit.
▪The platform lift must be maintained and safety-checked at the prescribed intervals.
▪Do not use the platform lift in case of fire! There could be a power failure during the
ride and the user would be trapped.
▪Never exceed the permissible payload. The payload is indicated on the control panel
of the platform.
▪Never bring your hands or loose clothing near the track or the grinding wall when
the lift is running.
▪Do not open the swivel doors by force.
▪Do not disable any safety device by making mechanical or electrical changes to the
installation. Without the written consent of Lehner Lifttechnik, all types of adjustments
and/or modifications to the system are prohibited

Sigma | User Manual Version 09/2022 Page 5
2.7.2 Use of the platform lift
The platform lift may only be used if it is in technically perfect condition. Any malfunction that could
affect safety must be avoided or eliminated.
Report anything unusual to your service technician. Do not use the platform lift in case of
irregularities and unusual noises - call the service immediately. All instructions and directions from
experts, fitters and service personnel must be followed.
Before entering the up or down command, make sure that no one is endangered by the
movement of the system. Always look in the direction of travel!
The transport of goods is only permitted if sufficient stability is ensured so that they cannot slip or
fall over.
Also, keep the keys in a safe place and do not give them to unauthorised persons. Do not leave the
keys on the vehicle or at the call points when the lift is not in use.

Sigma | User Manual Version 09/2022 Page 6
3TECHNICAL EQUIPMENT
The Sigma platform lift was developed for transporting wheelchair users. It is driven by a double
chain drive inside the drive tower. The lift is powered by 2 x 12 V batteries that are permanently
charged (as long as the power supply unit is powered).
The standard version is supplied with a manual swivel door on the platform as well as at the upper
landing position. Alternatively, the doors can also be delivered with an automatic door opener. The
lift can be operated from 2 radio remote controls in the stops and from the control on the platform.
The standard platform size is 1100 x 1400 mm.
3.1 Schematic representation

Sigma | User Manual Version 09/2022 Page 7
3.2 Technical specifications
*Expected for 2023
In some situations, it is necessary to make a special adjustment to the platform lift, which may change
the above specifications.
Load capacity
385 kg
Lifting height
min. 600 mm, max. 3000 mm
Maximum number of stops
4
Platform size
1100 x 1400 mm
Drive system
Double chain drive
Platform height min.
50 mm
Standard colour
RAL 9022
Volume
Under 60 dB
Temperature
+45 °C to -15 °C
Drive motor
24 V motor / 1.0 kW
Power supply
1 x 230 V
Energy supply
4 x 12 V batteries; 20 Ah
Emergency power supply
Integrated as standard
Controls at the stops
Radio-controlled
Certificates
TÜV according to EN 81-41*

Sigma | User Manual Version 09/2022 Page 8
4SAFETY DEVICES OF THE SIGMA
The Sigma platform lift is equipped with the following safety device:
4.1 Travelling platform swing door
The swing door, which must be closed during travel, prevents falling from the platform. Instead of
the manual swing door, an automatic swing door can also be installed as an option.
4.2 Safety bottom
The safety bottom is attached to the underside of the platform on platform lifts and serves as
additional safety. It reacts to pressure so that the system stops immediately if the safety floor hits an
obstacle. The travel command in upward direction remains active.
4.3 Contact bar acting upwards
There is a contact strip in the front area of the platform which prevents jamming in the upward
direction. The travel command in downward direction remains active.
4.4 Overload device
The platform is equipped with an overload device. If the load capacity specified on the type plate is
exceeded by more than 25%, an overload switch switches off the system, an acoustic signal sounds
and the overload status is indicated on the display. In this condition it is not possible to drive off.
The platform must never be overloaded. If an overload is signalled, the loading must be
reduced immediately.
4.5 Emergency stop
The platform lift is equipped with an emergency stop button. If you need to stop the platform in an
emergency, press the red button and the lift stops. Unlocking is done by pressing it again or turning
it clockwise.
4.6 Alarm button
The platform is equipped with an alarm button to summon help. By pressing the alarm button, a
loud emergency signal sounds.
4.7 Overspeed governor and safety gear
The platform lift is equipped with a overspeed governor and a safety gear. If the platform moves
downwards at an increased speed (e.g. due to a defect or similar), the increased speed is
immediately detected by the overspeed governor and the safety gear is triggered. The safety gear
brings the platform to a standstill by holding it on the guide rails. This prevents the platform from
falling.

Sigma | User Manual Version 09/2022 Page 9
4.8 Battery charging system
The drive motor of your platform lift is powered by batteries, which are charged via a charger. The
charging is permanent (also while driving).
If the platform lift is not charged, the lift will emit a short beep every second after 5
seconds. Check that the lift or the charger is connected to the mains. Turn off the main
switch on the back of the platform (the lift will stop beeping) and check if there is a power
failure in your building or if the fuse or RCD in the stairlift power supply circuit is not in
order. Replace the fuse or switch on the RCD and then the main switch at the rear of the
platform. If the lift continues to beep, please call the service department, it could be that
the battery charger is faulty.
If the battery voltage for the travel drive of the lift becomes too low, a long beep sounds
every 2.5 seconds while the lift is travelling. If the charger is connected and the lift still
beeps during travel even after charging the batteries, the batteries are defective. The
batteries must now be replaced by the service department. If the platform lift continues
to operate despite weak batteries, the control is programmed so that the platform will
reach the lower landing in any case with the remaining battery voltage.

Sigma | User Manual Version 09/2022 Page 10
5OPERATING ELEMENTS
5.1 Call stations at the landing stops
The Sigma platform lift is equipped with radio call station with a key switch as standard. With these
call stations, the platform can be called from one landing or sent to another landing.
The status of the landing control can be read from the LED:
LED light
Description
Green glow
Radio connection available and drive command is active
Orange glow
Radio connection present and lift does not move
Possible reasons:
•e.g.: The lift is already at the top landing when the Up button
is pressed.
•Safety circuit interrupted
Red glow
Radio connection available, but the lift is busy. Lift is operated from
the platform or from another call station.
Green flashing
Radio transmitter has been successfully registered with the receiver
Orange flashing
Radio connection interrupted
Red flashing
The battery of the radio transmitter is weak and should be replaced.

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5.2 Platform controls
On the platform are:
1. A key switch,
2. An overload indicator - only active in case of platform overload
3. The move command buttons for descent and ascent (0 and 1)
4. An alarm button
5. An emergency stop button

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5.3 Swing doors manual/automatic
Swing doors serve to close off the driving area of the platform. The doors are locked while driving
and in parking position.
To open (unlock) a swing door, the following must be done
▪the system must be switched on,
▪the platform is in the corresponding stop,
▪the travel command can be given at the switched-on call station of the corresponding stop
or the travel command can be given at the platform control for the corresponding stop.
Manual swing door
The manual swing door must be opened manually.
▪The manual swing door can be opened when the stage has reached the landing.
▪If the platform is already at the desired stop, pressing the travel command button on the
switched-on call station or on the platform control unlocks the door and the swing door can be
opened!
▪The corresponding swing door remains unlocked after reaching the stop or after pressing the
corresponding drive command for the set time in which the door can be opened. If the locking
time has expired, the corresponding drive command button on the call station or on the platform
control must be pressed again.
▪The opening time is adjustable.
▪The doors must be closed after each journey.
Automatic swing door
The automatic swing door is opened by an electric door drive.
▪The automatic swing door opens when the platform has reached the stop. During opening, the
drive command button does not have to be pressed!
▪If the platform is already at the desired stop, pressing the drive command button on the
switched-on call station or on the platform control automatically opens the door!
▪The opening time is adjustable.
Always make visual contact with the door! After the opening time of the automatic swing
door has expired, it automatically turns back into the closed position!
Take care that no one is trapped, injured or otherwise put in danger when closing. Keep your hands
away from closing/opening doors.

Sigma | User Manual Version 09/2022 Page 13
6OPERATING THE PLATFORM
The platform lift is safe and easy to use. The operation is optimally adapted to the user with walking
difficulties.
Before moving the platform, make absolutely sure that nobody is endangered by the
movement of the platform and the swing doors. If a dangerous situation arises while the
platform is moving, stop the platform immediately by releasing the command button!
6.1 Call the platform
If the platform is not at the desired stop, it can be summoned with the call station. The platform can
only be controlled from the stops when the swing doors are closed.
▪Switch on the call station by inserting the key and turning it. The green lamp now lights up.
▪Press the drive command button "Up" or "Down". The platform moves in the corresponding
direction as long as the button remains pressed. If you release the button during travel, the
platform stops immediately.
▪The platform stops independently at the stops.
▪Switch the call station off again when the platform has stopped in the stop by turning and
removing the key.
The lift can only be controlled from the stops when the swing doors are closed.
6.2 Opening the swing door and driving on the platform
Manual swing door
When the platform has arrived at the landing, the swing door can be opened manually.
When the door is opened, the control commands of the call stations are automatically cancelled so
that the platform cannot be operated by another person at the same time and safe travel on the
platform is ensured.
You can now drive on the platform.
Close the swing door manually again; this enables steering from the platform.
Automatic swing door
When the platform has arrived at the landing, the swing door opens automatically. Please note that
you are not in the door's turning range while it is opening.
When the door is opened, the control commands of the call stations are automatically cancelled so
that the lift cannot be operated by another person at the same time and safe travel on the platform
is guaranteed.
You can now drive on the platform.
The automatic swing door closes again automatically after an opening time set during installation.
Please ensure that you are not in the door's turning range when it is closing.

Sigma | User Manual Version 09/2022 Page 14
If an acoustic signal sounds when driving on the platform, the platform is overloaded and
must be unloaded again immediately.
6.3 Driving with the platform
On the platform there is a key switch, the drive command buttons, an alarm button and an
emergency stop button.
The wheelchair must be secured against rolling on the platform by a parking brake or, in
the case of electric wheelchairs, by equivalent measures (e.g. switching off)! Hold on to
the handrail!
The drive command is given by pressing the drive command button for the desired direction. Keep
the drive command button pressed until you reach the desired stop.
If you release the drive command button while driving, the vehicle stops immediately. If the vehicle
does not stop when the drive command button is released, an emergency stop (red button) has
been installed for additional safety. If this emergency stop is pressed, the system stops immediately.
The emergency stop button is unlocked again by pressing it again or turning it clockwise.
6.4 Leaving the platform
The lift is designed so that the platform stops in the right place in the stops. After the platform has
stopped in the desired stop, you can release the travel command button.
Manual swing door
Open the swing door manually again. You can now leave the platform. After leaving the platform,
the manual swing door must be closed so that the call stations become active again. The platform
can now be called to a desired location or used by another person.
Automatic swing door
The automatic swing door opens automatically. You can now leave the platform.
Depending on the lifting height, there may be a small step between the platform level and the
stop level (caution: risk of tripping).
The automatic swing door closes again automatically after an opening time set during
installation. Please ensure that you are not in the door's turning range when it is closing!

Sigma | User Manual Version 09/2022 Page 15
7TROUBLESHOOTING
7.1 General
For safety reasons, your Sigma platform lift is fitted with a number of electrical and mechanical
interlocks and touch sensitive edges. If any of these devices are not in order or any component or
sequence is not working correctly, the unit will not operate. In the event of a breakdown, you can
independently check your system for faults with the support of the points listed below or contact the
service personnel. Under no circumstances may you manipulate, modify, or remove the safety
devices of the system.
In the event of a malfunction, the following instructions must be worked through completely, point
by point. Do not skip any step!
Before you start, consider the following points:
•Visually inspect the entire installation for damage, deformations, etc.
•Check that the system is switched on. If your lift beeps while driving or in the stop position,
please read the description of the beeper in the chapter "Battery charging system".
•Please ensure that the lift cannot be operated from the call stations while the platform is
folded down or someone is operating the system from the platform.
•Check whether the main switch of the platform, which is located on the left side of the
platform, is switched on. The green lamp on the switch must now light up!
•Check whether the batteries (if any) in the call stations are empty and have them replaced
with new ones if necessary.
•Also note that the first call station to be activated by a command signal takes control of the
lift (provided that no one operates the controls on the platform), so no other call stations
can be used until that command signal is deactivated.
•When calling for service, please have the system number to hand. This is located on the type
plate on the front side of the stairlift and is marked with the serial number "LE xxxxx". This
number is the quickest way to identify your lift and provide you with efficient information.

Sigma | User Manual Version 09/2022 Page 16
7.2 Error table
Error
Cause
Remedy
The system does not run at
all.
Batteries are empty.
Supply power to the charger.
Turn off the main switch of
the system.
Switch on the main switch.
Key switch on the operating
cassette off.
Switch on the key switch.
EMERGENCY STOP button
actuated.
Unlock the button by pressing
it again and turning it
clockwise.
Swing doors are not closed
and locked.
Close doors firmly.
Platform moves against
mechanical resistance.
Remove obstacle.
Platform does not reach the
intended height.
Upper limit switch or encoder
is not working properly.
Replace the switch or have it
reset by the service company.
Platform does not move
upwards.
The contact strip on the
platform is actuated.
Clear the contact strip by
moving down and removing
the object.
Platform does not move
down.
The safety bottom under the
platform is blocked /
activated.
Clear the safety bottom by
driving up and removing the
object.
A swing door does not open
The platform does not reach
the landing completely or the
door zone switch and/or limit
switch is defective.
Replace switch or have it reset
by the service company.
Check whether the contact
bar/safety bottom is activated.