Yard Force SA800PRO User guide

GB

ROBOMOWER

Original Instructions

Model SA800PRO

Hotline: [phone] 251006
Fax : [phone] 251007
Mail: [e-mail]
www.yardforce.de

Merotec GmbH
Hanns-Martin-Schleyer-Str. 18a
47877 Willich / Deutschland

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4a

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4b

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Read this manual carefully prior to assembling and
operating the Robomower. It is dangerous to operate this
product without being familiar with these instructions.
Keep this manual in a safe place and have it ready for
future reference.

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SA800PRO Original Instruction

CONTENT

INTRODUCTION

Congratulations on the purchase of your new device. During production, this equipment has
been checked for quality and subject to a nal inspection. The functionality of your equipment
is therefore guaranteed. It cannot be ruled out that residual quantities of water or lubricants
will remain on or in the equipment/hose lines in isolated cases. This is not a fault or defect
and it represents no cause for concern.

Introduction 05

Intended purpose 05

General description 05

Technical Data 07

Safety precautions 08

Assembly instructions 28

Operation 42

Cleaning/maintenance 56

Troubleshooting 61

Declaration of conformity 65

The operating instructions constitute part of this product. They contain important
information on safety, use and disposal.
Before using the product, familiarise yourself with all of the operating
and safety instructions. Use the product only as described and for the
applications specied. Keep this manual in a safe place and in the event that

the product is passed on, hand over all documents to the third party.
The Robomower is exclusively designed for mowing lawns. It is only intended for private use
and is not suitable for commercial use.

INTENDED PURPOSE

Any other use that is not specically approved in these instructions can result in damage to
the Robomower and could be a serious danger to the user.
This appliance MUST NOT be used by children and persons with reduced physical, sensory
or mental capabilities or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their
safety.
Children should be supervised to ensure that they do not play with the appliance.
The owner or operator is responsible for any accidents or harm to other people and their
property.
The manufacturer cannot be held liable for damage caused by incorrect operation of
the Robomower or use not in line with its intended purpose.

GENERAL DESCRIPTION

Scope of delivery

Carefully unpack the mower and check that all the subsequently listed parts are present:

• Robomower

• Charging station

• Transformer

• Extension cord

• Boundary wire

• Boundary wire connector B (blue)

• Fixing pegs

• Spare blades

• Measurement ruler (on the color box)

• Cement resistor

• Manual

4 5

GENERAL DESCRIPTION TECHNICAL DATA

Overview

The illustration of the principal functioning parts can be found on the front and
back foldout pages.

1 Robomower x 1
2 STOP button
3 Display and keypad
4a: Charging contacts (Robomower)
4b: Charging contacts (charging station)
5 Charging station x 1
6 Blade (3 per each)
7 Blade holder
8 Front wheel
9 Rear wheel
10 Carrying handle with safety switch
11 Main power switch
12 Control panel
13 Transformer x 1
14 Extension cord x 1
15 Fixing peg x 200
16 Measurement ruler (on the color box) x 2
17 Boundary wire connector x 3
18 Boundary wire x 1 (150m)
19 Cement resistance x 1

Functional description

This Robomower is an autonomous robot used to cut lawn grass. It will remain within an area
designated by a boundary wire, start work following a programmed schedule and return to its
charging station as needed. The three sharp blades ensure clean cuts with minimal damage
to the plant, leaving behind tiny snippets as natural fertilizer.

Max cutting area 800 m

Battery

2

862601-INR186500-29E
Lithium-Ion battery, 28V/2.9Ah, 81Wh

FY3201500

Power supply

Input 100-240V AC, 50/60 Hz

Output 32 V DC, CC1.5A
Typical mow time on one charge 80 min
Rated voltage 28 V DC
Rated power

No load cutting speed

50 W

3500 min

-1

Cutting width 18 cm
Blade model / part number 846210
Cutting height adjustment 5 Settings
Cutting height, min-max 20 mm-60 mm
Number of blades Three (Pivoting)
Charging time 90 min
Recommended time per day* Please see note 1 below

2

300 m
600 m
800 m

2

2

4 hours

6 hours

8 hours

Degree of protection:

Robomower IPX4
Charging station IPX4
Power supply IP 67
Robomower weight

8.5 Kg
Charging Station weight 2 Kg
Robomower size, L x W x H 570 X 390 X 260 mm
Package size, L x B x H 780 X 510 X 330 mm
Gross weight 18 kg

Measured sound power level

Measured sound pressure 46.6 dB(A) , K=3.0 dB(A)
Guaranteed sound power level L

= 67 dB(A) (K=0.35 dB(A))

WA

The sound values have been determined according to noise test code given in EN 50636-2­107, using the basic standards EN ISO 11203 :2009 and EN ISO 3744:2010.
The noise gures quoted are emission levels and are not necessarily safe working levels.
Factors that inuence the actual level of exposure of work-force include the characteristics
of the work room, the other sources of noise, i.e. the number of machines and other adjacent
processes and the length of time for which an operator is exposed to the noise. Also the
permissible exposure level can vary from country. This information, however, will enable the
user of the machine to make a better evaluation of the hazard and risk.

Note 1: The recommended time per day stated in this specication is just for reference. It

*

depends on the condition of blades, the type of the grass being cut, the growth condition,
humidity and whether lawn area is at. A more complex lawn with trees, ower beds,
paths and slopes may require a longer work time.

6 7

SAFETY PRECAUTIONS SAFETY PRECAUTIONS

This section covers the basic safety instructions when
working with this machine.

General notes on safety

Danger of injury due to ung-out material! Keep
bystanders well away from the machine.

This machine can cause serious injury if it is
not properly used. Please read these operating
instructions carefully and familiarise yourself with
all the control elements before operating this
machine.
Keep these operating instructions in a readily
accessible place so that this information is always
at your disposal.
Please note that despite all measures to integrate
safety measures into the construction, the safety
devices and supplemental safety measures, a
resiudual risk remains when using this machine.

Symbols used in the manual

Warning symbols with information on damage and
injury prevention.

Warning symbol with information on the danger of
electric shock.

WARNING - Do not ride on the machine.
CAUTION - Do not touch rotating blade.

WARNING – Remove the disabling device
before working on or lifting the machine.

WARNING – Keep your hands and feet away from
the rotating blades. Never place your hands or
feet close to or under the body when Robomower
is in operation.

Return any discarded batteries to your local
dealer, collector or recycle point.
It is not permitted to dispose of this product as
normal household waste. Please recycle where
facilities exist. Check with your local authority or
retailer for recycling advice.

Symbols on the machine

Caution!
These instructions must be read.

67

8 9

Guaranteed sound power level value is 67dB.

SAFETY PRECAUTIONS SAFETY PRECAUTIONS

Warning Symbols on the charger

Warning!

Before use, refer to the corresponding
paragraph in the manual.

Double insulation

Pole orientation

Waste electrical products should not be disposed
of with household waste. Recycle where facilities
exist. Check your local authority or retailer for
recycling advice.

CE conformity mark

Warning Symbols on the battery pack

Batteries contain Li-Ion and should not be
disposed with general household waste. Contact
your local authority for disposal advice.

Do not throw into water.

Do not throw on to re.

Do not subject the battery to strong sunlight
over long periods and do not leave it in high

O

temperatures.(max.45

C).

Waste electrical products should not be disposed
of with household waste. Recycle where facilities
exist. Check your local authority or retailer for
recycling advice.

10 11

SAFETY PRECAUTIONS SAFETY PRECAUTIONS

Additional safety instructions for Robomowers

Do not store anything heavy on the top of the Robomower
or charging station both during storage and when use.

Never use the device if the main power switch (11) is
damaged or does not work properly. Never bypass the
main power switch. Set the main power switch to OFF for
storage or when the device is not in use. Use the original
packaging when transporting the Robomower,
especially for long distances.
If you need to move the Robomower from or within the
working area, rst press the STOP button (2) to stop the
device.

Secondly, ensure that the main power switch (11) is
switched OFF before you lift up your Robomower.

Main Power switch

Thirdly, close the top cover and carry the Robomower
by the carrying handle (10) at the rear under the mower,
keeping the blade disc away from your body as shown.

Note: The carrying handle (10) includes two safety
switches. Lifting the device by the carrying handle will
trigger the switches, deactivating the Robomower.

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SAFETY PRECAUTIONS SAFETY PRECAUTIONS

Lightning Protection

In order to prevent lightning damage to the machine, do
not place the charging station under tall trees.

Operating the machine:

WARNING! This machine can cause serious injuries.
Follow instructions below to reduce risk of accident
and injury.

IMPORTANT

READ CAREFULLY BEFORE USE

KEEP FOR FUTURE REFERENCE

• Never allow children, persons with reduced physical,
sensory or mental capabilities or lack of experience
and knowledge or people unfamiliar with these
instructions use the machine.

• Local regulations may restrict the age of the operator.
Children should be supervised to ensure that they do
not play with the appliance.

• The operator or user is responsible for accidents or
hazards occurring to other people or their property.

• Ensure the correct installation of the perimeter
boundary system as instructed.

• Periodically inspect the area where the machine
is to be used and remove all stones, sticks, wires,
and other debris which could cause damage to the
machine or be unsafe.

• Periodically visually inspect to see that the blades,
blade bolts and cutter assembly are not worn or
damaged. Replace worn or damaged blades and bolts
in sets to preserve balance.

• On multi-spindle machines, take care as rotating one
blade can cause other blades to rotate.

• Never leave the machine to operate unattended,
especially while other people such as children and
pets are in the area.

Preparation:

• Read the instructions carefully and make sure you
understand them fully. Be familiar with the controls
and the proper use of the machine.

14 15

• Never use the machine to level out uneven patches.

SAFETY PRECAUTIONS SAFETY PRECAUTIONS

• If the blades no longer cut correctly or if the motor is
overloaded, check all the parts of your equipment and
replace the worn parts. If a more extensive repair is
required, contact the customer service centre.

Use:

• Never operate the machine with defective guards or
without safety devices, for example deectors and/or
grass catchers, in place.

• Do not put hands or feet near or under rotating parts.

• Never pick up or carry the machine while the motor is
running.

• Turn OFF / Power OFF the machine

– before clearing any blockages.

– before checking, cleaning or maintaining the
machine.

• Start Robomower according to the instructions.When
the main power switch (11) is in the ON position, make
sure you keep your hands and feet away from the
rotating blades.

• Never lift the Robomower or carry it around with the
mains switch is in the ON position.

• Do not use the Robomower with defective blade discs,
body, defective blades, screws, nuts etc.

• Avoid operating the machine in wet grass. Doing so
can cause additional wear and tear and will increase
the amount of cleaning required.

Work interruptions:

• After the machine has been turned off, the cutting
cylinder will continue to rotate for a few seconds.
Keep hands and feet well away.

• Only remove blockages when the machine is standing
completely still. Ensure that the grass ejector opening
(if any) is clean.

• Switch off the power when the machine is transported,
lifted or tilted.

• Never leave the machine unattended. Children should
be supervised to ensure that they do not play with the
appliance.

CAUTION!

The following below outlines measures to avoid
damage and harm to both the Robomower and
people using it.

• Do not let persons use the mower who do not know
how it works or behaves.

• Do not put anything on top of the Robomower or its
charging station.

16 17

Taking care of your machine:

• Switch off the power when the machine is to be
carried across uneven surfaces, for example steps.

SAFETY PRECAUTIONS SAFETY PRECAUTIONS

• Inspect the machine before each use. Never operate
the machine if safety devices (e.g. impact protector,
parts of the cutting facility or bolts) are missing, worn
out or damaged. Check the power cable and starting
lever (if any) for damage. To avoid imbalance, all tools
and bolts must be changed as complete sets.

• Only use spare parts and accessories that have been
supplied or recommended by the manufacturer. The
use of alien parts results in the immediate loss of all
guarantee claims.

• Ensure that all nuts, bolts and screws are rmly
tightened and that the machine is in a safe working
condition.

• Never try to repair the machine yourself, unless you
have been trained accordingly. All work that has not
been listed in these instructions must only be carried
out by authorised servicing agencies.

• Treat the machine with the greatest care. Always keep
the tool clean. Follow the maintenance instructions.

• Never overload the machine. Always work within
the specied capacity range. Do not use low-power
machines for heavy-duty work. Do not operate the
machine for purposes for which it is not intended.

Electrical safety:

• Before each use, carry out a visual inspection of the
power and extension cord for any signs of damage or
ageing. Damaged mains power cables increase the
risk of electric shock.

• Connect the machine to a power socket with a
residual-current circuit breaker that has a rated current
of no more than 30 mA.

• Always keep the extension cable well away from
the cutting tools. Should the power cable become
damaged during work, instantly disconnect the power
cable from the mains. DO NOT TOUCH THE POWER
CABLE BEFORE IT HAS BEEN DISCONNECTED
FROM THE MAINS! Risk of electric shock.

• The supply cord cannot be replaced. If the cord is
damaged the appliance should be scrapped.

• Keep extension cable away from blades and other
moving parts. They may damage the cable and result
in contact with live parts.

• Check that the mains voltage is the same as indicated
on the rating plate.

Maintenance and storage

• Keep all nuts, bolts and screws tight to be sure the
machine is in a safe working condition.

• Replace worn or damaged parts for safety.

CAUTION!

The following states how to avoid accidents and
injuries due to electric shock:

18 19

• Ensure that only the recommended replacement
cutting blades are tted.

SAFETY PRECAUTIONS SAFETY PRECAUTIONS

• Ensure that batteries are charged using the charger
supplied or recommended by the manufacturer.
Incorrect use may result in electric shock, overheating
or leakage of corrosive liquid from the battery.

• Servicing of the machine should be carried out
according to manufacturer's instructions.

• In the event of leakage of electrolyte, ush with water/
neutralising agent, seek medical help if it comes into
contact with the eyes.

• Store the appliance with battery pack fully charged at
room temperature (around 20ºC).

• Every deep discharge cycle decreases the capacity
of battery pack. To prolong battery life, it is
recommended to charge the battery every 6 months
over extended periods of time without use.

Transport

The original packaging should be used when transporting
the Robomower over long distances.
To safely move from or within the working areas:

• Press the STOP button to stop the mower.

• Move the main switch button to the OFF position if you
intended to carry the mower.

• Carry the Robomower using the handle below at the rear.
Carry the mower with the blade disc away from the body.

Robomower basic operating principles

• The Robomower chooses its working direction randomly.
It will mow your garden completely without leaving
behind any uncut part within the area restricted by the
chosen boundary.

• You dene the work area by installing the supplied
boundary wire. Once the Robomower detects the
boundary wire, it will stop, move backwards and
continue mowing in a different direction. It is important to
ensure that the boundary is complete. Any objects you
wish to protect within the boundary, such as a garden
pond, trees, garden furniture or ower beds can also be
protected by the boundary wire. The boundary wire must
form one complete loop. If the Robomower encounters
an obstacle, such as a person, tree, pet or other general
garden obstacles, it will stop, move backwards and
continue mowing in a different direction.

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SAFETY PRECAUTIONS SAFETY PRECAUTIONS

• If you need a narrow corridor to connect two patches
of lawn within the boundary, the corridor should be at
least 2 metres wide and max. 8 m long.

min. 2 m

max. 8 m

Note: If your Robomower loses ground contact while
hitting an obstacle, the blade disc will stop immediately
to avoid any potential damage.

Locating the charging station

• When the battery is running low, the Robomower
will automatically return to the charging station. It
will approach the closest boundary wire and follow it
anticlockwise (without cutting) back to the charging
station. When fully charged, the Robomower will
automatically resume the interrupted working cycle. The
launch direction from the charging station - clockwise - is
hard-wired into the design and is impossible to change.

Recognising the boundary wire

• Note that before stopping and changing the direction,
the Robomower will overrun the boundary wire by 10
to 40 cm. Please keep this in mind when planning the
boundary wire installation.

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SAFETY PRECAUTIONS SAFETY PRECAUTIONS

10-40 cm

Starting and stopping while mowing

• If you want to stop the Robomower at any time during
cutting, please press the STOP button (2). Pressing the
STOP button will also open the top cover, providing
access to the control interface. The Robomower will not
start working again until you have closed the top cover.

Robomower mowing limitations

• Out of the box, the Robomower is set to work 7 days a
week. You can adjust the daily working time to match
your garden.

• In case a neighbour is using the same Robomower, you
need keep a 0.5 m distance between your and your
neighbour's boundary wires. Otherwise, the two devices
might interfere with each-other. Additionally, keep
your charging station more than 10 m away from your
neighbour's boundary wires. Last not least, ensure that
the adjacent boundary wires use different signals. Please
refer to section "Signal setting" in order to select signal
S1 or S2 for your installation.

> 10 m

Own land Neighbour

S1 S2

> 0,5 m

> 10 m

Below is a table showing the signal distances for each
Robomower. Please note your model and use this
information as your guide when designing the boundary
layout.

Model Max field Max. distance to wire

SA800PRO 800 m

24 25

2

14 m

SAFETY PRECAUTIONS SAFETY PRECAUTIONS

2

NOTE! When the working area is less than 100 m

or
total boundary wire less than 40 m, please integrate the
supplied 10 Ω / 20 W cement resistance to the boundary
wire.

2

＜100 m

Robomower cutting information

• Do not use the Robomower during lightning or thunder
storms. In case of damage to the electronic circuitry,
unplug the charging station and - if possible - disconnect
the boundary wire.

• The Robomower has a cutting height setting between
20 mm to 60 mm. If the grass height exceeds 60 mm,
cut it to 60 mm or below before using the Robomower.
Otherwise the load on the unit will be too large and the
cutting efciency will suffer, we recommend using an
ordinary lawn mower or trimmer. Once the installation is
complete, adjust the cutting height to the desired setting.
Always start in a high cutting position and work your way
down to the cutting height you want. Before adjusting
the cutting height, always press the STOP button (2) to
interrupt the cutting. Then turn the large dial to adjust the
cutting height.

Note: Only adjust the cutting height while the Robomower
is switched off.

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The Robomower cutting efciency relies on sharp
blades, so please keep them in good condition.

ASSEMBLY INSTRUCTIONS ASSEMBLY INSTRUCTIONS

Installation Guide

This chapter explains how to install the Robomower. Please read this completely before you
start the installation.

Introduction

We recommend creating a draft of your lawn, including all obstacles and how these should
be protected. This makes it easier to nd a good position for the charging station and how
to correctly place the boundary wire around your garden perimeter protecting bushes, ower
beds etc. You will also need some tools, like a hammer and wire cutters, pliers or scissors.

Cutting limitations

The Robomower is equipped with collision sensors. These will detect any rigid
and xed obstacles higher than 100 mm, such as walls, fences and garden furniture.
When triggered, the Robomower will stop, reverse backwards and then continue mowing in a
different direction. Still, protecting the obstacles running the boundary wire accordingly is the

recommended long-term solution.

< 400 mm

Trees

Uneven lawn areas may cause the blades to touch the ground. We recommend leveling
lawn before using your Robomower or excluding uneven areas with he boundary wire.

Stones

We recommend clearing the lawn of small (less than 100 mm high) rocks and stones and
any stones with a round or sloped edge. The Robomower might try and climb such
rocks instead of recognising them as a barrier.
A Robomower getting stuck on such a stone requires user intervention to restart mowing.
Contact with stones can result in damage to the blades.

> 100 mm

Slopes

The Robomower can navigate slopes up to a maximum of 50% incline or decline.

Slope should not be steeper
than 50 % (27°).

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ASSEMBLY INSTRUCTIONS ASSEMBLY INSTRUCTIONS

The boundary wire should never run perpendicular to a gradient of more than 10°.
Likewise, please allow a corridor of at least 2m between a 10° or steeper slope and the boundary
wire. Otherwise, the faster downhill speed may cause the Robomower to
overshoot the boundary wire, especially on wet and slippery ground.

min.

2

m

Boundary wire

Slope should not b e

Slope should not be

steeper than 10˚

steeper than 10°

Paths, Driveways and Roads

If an elevated driveway crosses your lawn, better keep it outside the boundary wire.
Please allow a safety distance of 40 cm between driveway and boundary wire.

If the driveway and lawn are at the same level, feel free to use the boundary wire to create a
corridor. This allows your Robomower to cross the driveway and reach the opposite lawn.

boundary

boundary

Uneven lawn surfaces

Uneven lawn areas or may cause the blades to touch the ground. We recommend leveling
the lawn before using your Robomower or excluding uneven areas with the boundary wire.

> 40 cm

boundary wire

30 31

ASSEMBLY INSTRUCTIONS ASSEMBLY INSTRUCTIONS

Flowerbeds

Use the boundary wire to exclude any owerbeds from the cutting area. There are two
options for the two lengths of boundary wire running between the owerbed and the
outer boundary:

1) Keep the distance between the parallel wires above 10 cm. This way, the Robomower will
recognise the boundary wire as an ordinary obstacle. When cutting, it will "bounce" off it as
usual. When following the boundary wire back to the charging station, it will take the detour
around the ower bed.

> 10 cm

2) Alternatively, keep the distance between the two parallel wires below 5 mm. Do not
cross the wires - see below. This way, the Robomower will not recognise the wires and
travel across them unhindered. This option requires placing an obstacle on the boundary
wire around the owerbed. Place the obstacle, e. g. a large rock or pole, near position A
indicated on the below illustration. The obstacle must be surrounded by a at area of about
1 m x 1 m, without any slopes. This obstacle will allow the machine to exit the circle.

Ponds and Pools

While the Robomower is protected against rain and spray water, being submerged is likely to
cause severe damage to the electronic parts.
Therefore, it is imperative to exclude any pools from the cutting area. For added safety, we
recommend placing a fence around the pool.

> 10 cm

General Dos and Don’ts

Do not run the boundary wire parallel directly above an ordinary power cable.
The power cable's electric eld may distort the boundary signal.
Never cross two boundary wires! This will distort the radio signal and cause erratic behavior
of the Robomower.

Never cross the wires!

If you have created a boundary corridor inside your working area, the corridor should be at
least 2 m wide and a max length of 8 m.
If a corridor is too narrow or too long, the Robomower might not be able to navigate it from
one end to the other.

< 5 mm

Max length

of the

corridor is

8 m

Minimum width of

the corridor is 2 m

32 33

ASSEMBLY INSTRUCTIONS ASSEMBLY INSTRUCTIONS

Keep in mind that owers, bushes and surrounding shrubbery will change in size over a season.
Please keep sufcient space between boundary wire and other plants to avoid interference year­round.

Marking out the Robomower's working area

You have now understood the basic principles of how the Robomower works. The next step
is to mark out the working area with boundary wire by referring to your garden plan. This is a
very important part of the installation, so please take care.
Starting from the charging station, the boundary wire must be one continuous loop without
any breaks or crossings. Connecting the end to the charging stations second connector will
complete the circuit.
Where appropriate, use the included ruler to check the 40 cm required distance.
Firstly, locate the best position for your charging station. Be aware that it needs a permanent
connection to the mains, so take into account the location of the nearest power outlet.

The included supply cord has a length of 9 m.
The charging station (5) must be placed on a at surface, at ground level.

Both the front and back of the charging station must be accessible to the boundary wire. To
ensure the Robomower can return to the charging station smoothly, leave 2m of straight wire
to the front of the charging station and 1m to the side facing the cutting area. Use a shaded
location for the charging station, as a lower temperature while charging is benecial to the
battery.

Important: Place the charging station on an even, at surface away from ponds, pools or
stairs.
We recommend suitable protection from the elements, for example a robot port or garage.

Pay attention to protect cable!

34 35

> 1 m

> 2 m

ASSEMBLY INSTRUCTIONS ASSEMBLY INSTRUCTIONS

Do not place the charging station too close to a slope, such as at the top of a hill or the
bottom of a furrow. Avoid left and right inclination in excess of 5 degrees.

Pegging out the boundary wire

We strongly recommend mowing the lawn to 60 mm or less before laying out the boundary
wire. Burying the boundary wire is entirely optional. Still, the closer to the ground you lay out
the boundary wire, the lower the chance of tripping over it or damaging it when mowing the
lawn.
In a very short time, the wire will be covered by grass. As the voltage is only 32 V, there
is no risk of electric shock.
Unpack the boundary wire (18) and locate the free end. Mark the desired path of the
boundary wire with the xing pegs (15).
Use the included ruler (16) to to ensure the required 40 cm distance between wire and
obstacles.
The recommended distance between two pegs is about 80 cm in straight lines, and less in
tight curves. Note that the pegs' hook and wire slit always faces the outside of the boundary.
When rst planting the pegs, do not drive them fully into the ground. Use a light hammer
to drive them in a little bit. Also locate the xing pegs (item 15) and lay each one on the lawn
at approximately the correct distance from lawn edges (40cm) and obstacles.
There is a gauge supplied for this (item 16).

Cutting area

If your lawn has a soft or uneven surface, we recommend fortifying the area around the
charging station with a grass protection mesh. Otherwise, the repeated stress of the rear
wheels can damage the turf.
Once the position of the charging station is conrmed and mains electrical connection is
laid out, please do not connect to main power yet. Finish all boundary layout work before
connecting the charging station to the power supply.

40 cm

80 cm

Once all pegs are in position, lay out the boundary wire. Start from the charging station. Run
the wire through the peg's hook and wire slit one-by-one. Do not tighten the boundary wire
too much to prevent wire damage. Carefully prevent any kinks, knots, etc.
When cutting the wire, we recommend leaving at least 1 m spare wire to allow for
adjustments.

The pegs should be knocked into lawn
with wire location to boundary outside
like shown.

Note: The pegs are not suitable for xing the boundary wire on hard surfaces, e.
g. when running the boundary wire across a driveway. Instead, use appropriate
screws and plugs. Be sure to use insulation washers to protect the wire
insulation.

36 37

ASSEMBLY INSTRUCTIONS ASSEMBLY INSTRUCTIONS

Only use the included waterproof boundary wire connectors (17) to join together two
pieces of boundary wire.
See below for some further sketches giving more distance guidelines.

Suitable location for
the charging station

Connector
F, black

Avoid right angles when running the boundary wire around a corner. Instead, separate into
two 45° angles.

Connector B, red

1 m extra wire
for potential
adjustment

NO

OK

Prepare the boundary wire for the charging station

Use a wire stripper to remove 10-15 mm insulation from each end. Twist the threads tight.

10 - 15 mm

2

NOTE ! If the enclosed working area is less than 100 m
length is less than 40m, connect a 10 Ω / 20 W cement resistance to the boundary wire.

or the total total boundary wire

Connect the charging station to the boundary wire

Place the charging station on the end of the boundary wire so that the wire runs lengthwise below
the middle of the charging station. Connect that end to the left (black) connector marked "F"
(front). Connect the other end to the right (red) connector marked "B" (back).

F (black)

In case the included boundary wire is too short for your garden, more is available from our
service provider.
The wire's total length must not exceed 300 m.

38 39

B (red)

IMPORTANT INFORMATION

Double check that the charger connections are as shown below. Even if there is a blue light, if
the connectors are wrongly connected the machine will not work.

ASSEMBLY INSTRUCTIONS ASSEMBLY INSTRUCTIONS

After connecting the “F” and "B" connectors to the charging station, the charging station
can be xed down with the boundary pegs.
Before xing the charging station, please check again that the above mentioned conditions
are met:

- Even surface within range of power supply

- 2 m straight boundary in front,

- Inclination less than 5

o

- Surplus boundary wire tucked under the charging station for protection, outside the
boundary and laid out in slopes (not rolled-up).

Once the charging station is xed, connect the charger extension cable (14) to charging base.
Now, connect the power supply to the mains outlet. After a brief self-test, one blue LED on the
charging station should light up. If all LEDs stay dark, double-check the mains outlet and the
power supply. If other than a single blue LED lights up, please refer to the chapter on trouble­shooting.

Turn on and test the installation

LED

Once the blue LED conrms all is OK, test the Robomower's function. Check the LED
regularly to ensure xing the boundary wire has not affected the connection. Then place
the Robomower in the working area, a few metres beside the charging station.
Set the main power switch (11) to "ON". The Robomower will power-up and start a
self-test, but not start working at this time.

Press down on the large STOP button (2) to open the top cover and access the controls.
Activate the button marked "

" (situated on the left part of the display) and press

down the top cover to close it.

Once closed, the Robomower will automatically return to the charging station by locating
and following the boundary wire in anti-clockwise direction. If the Robomower fails to dock
correctly, move the charging station to a more suitable position.

Once the device has docked, the

symbol will start ashing. This indicates that the battery

is charging correctly.
After initial installation, the Robomower will remain in the charging station until the battery is
fully charged.
Successful docking and charging indicates that you have found a suitable position for the
charging station. It is now time to x it in position by fully driving the pegs into the ground.
Take care not to damage or kink the surplus wire stored under the charging station.

1 m at lawn

Area to be cut

40 41

2 m

OPERATION

OPERATION

Setting the mowing height

The mower’s mowing height can be set between 20 and 60 mm with 5 cutting heights. If
the grass is higher than 60 mm, it will be necessary to mow the grass using a standard
lawnmower. Otherwise, the grass will cause too great a load for the mower’s blades and thus
lead to unsatisfactory mowing. Do not adjust the cutting height during mowing.

1. Press the main isolation switch to turn off the mower.

2. Open the top cover.

3. Rotate the mowing height selector to adjust the mowing height.

• It is recommended to begin with mowing by setting the mowing height to 60 mm (by
setting the selector to MIN) and then gradually lowering the mowing height until you get
the desired grass height.

4. Close the top cover after the adjustment.

Note: The mower can cut on wet grass. However this will lead to clumps of grass
forming under the mower which means more frequent cleaning of the mower is
necessary.

Starting and stopping the mower

Starting the mower

1. Make sure the mower is sufciently charged.

2. Press the main isolation switch to turn on the mower.

3. Press the STOP button to open the control panel cover.

4. If a PIN is set, enter the PIN with the number keys on the display .

5. Press the START button in the control menu.

6. Close the control panel cover. The mower will start mowing.

Note: The mower can be programmed to automatically start mowing at specific times

and on specific days in a week. See the section: Programming the mower.

Stopping the mower

• Press the STOP button(2) to immediately stop the mower.

Note: Once the STOP button is activated, the control panel cover will open and the
mower will wait for further commands. The mower will not start to work until the control
panel cover is closed.

Messages on the display during operation

While mowing, the display will show the operating status of the mower.

Information includes the current date and time, battery level, boundary cable signal
(S1 or S2) and operation status message (see below).

Message Description

Running

Home

Low voltage

Charging The mower is being charged.

No signal There is no boundary cable signal.

Outside The mower has moved outside the mowing zone.

Trapped

Pit

Slope

Lifted

The mower is working. When the blade disc starts to rotate, the
blade disc icon (

The mower is in the process of returning to the charging sta­tion.

The battery power is low and the mower will return to the
charging station.

The obstacle sensor gives continuous alert for more than 10
seconds. The mower has stopped for safety reasons.

The obstacle sensor has triggered more than 10 times in one
minute. The mower has stopped for safety reasons.

The mower has encountered a steep slope which it cannot
overcome.

The mower has either been lifted up or risen up over an obsta­cle.

) will show and ash on the display.

Error Incorrect PIN passcode is entered.

42 43

OPERATION

OPERATION

Returning to the charging station

After approximately 90 minutes of mowing and when the mower’s battery power is low, the
mower will automatically return to the charging station by locating the closest boundary
cable and following it anticlockwise (without mowing) back to the charging station for a full
recharge. The display of the mower will show a charging symbol during charging.

When charging is complete, the mower will continue with the next mowing cycle.
The mower will also return to the charging station if you press the HOME button on
the control pane and then manually close the control panel cover. It also stays at the charging
station during spare time (no work is assigned).
If for some reasons the mower cannot successfully return to the charging station, it will
attempt ve times before staying on the lawn and turning itself off to save battery power. In
this case, check if the charging station is correctly installed.
In addition, if the ambient temperature is higher than 40° C, the mower will stop charging to
protect the battery. Charging will resume when the temperature drops to a suitable ambient
temperature.

Programming the mower

The mower can be programmed through the control menu which can be accessed from the
control panel(10) of the mower.

IMPORTANT: Set the date and time rst as this is the base for the rest of the programming.

Note: The control panel can only be accessed by pressing the STOP button on the
top of the mower to unlock the control panel cover and ensure that the mower stops
working when you are programming it. After programming, the control panel cover
must be manually closed to resume the mower working and start carrying out the
programmed activities.

Control panel

The control panel consists of the touch-sensitive display and physical
buttons. The physical buttons serve as a backup when there is any difculty to use the touch­sensitive display (e.g. low temperature).

Functions of the physical buttons:

Button Description

Each press of the button will move the selection cursor

(up)

(down)

Enter

Home

Start Press the button to start a mowing cycle.

Back

upwards/ leftwards, or toggle among the available options in a
setting.

Each press of the button will move the selection cursor
downwards/ rightwards, or toggle among the available options
in a setting.

Press the button to conrm a selection in the control menu.
station.

Press the button to return the mower to the charging station for
charging.

Press the button to return to the previous screen in the control
menu.

44 45

OPERATION

OPERATION

Display

The display of the control panel is touch-sensitive.

Software version and serial number

When you turn on the mower, the software version and serial number will show briey on the
display.

Security PIN

For security reason, a PIN is required to access the control menu. The default passcode
is “0000”. To change the passcode, see the section: Using the control menu > Settings
> PIN.

Navigating in the control menu

• Directly press on an icon or button on the display for input or selection.

• Press on the icons below for more navigation controls.

Icon Description

This is the same as the backspace key on a keyboard to cancel the last input.

This is the same as the enter key on a keyboard to conrm a selection.

This is the same as the escape key on a keyboard to return to the previous menu.

• Alternatively, use the physical buttons on the control panel to navigate in the control
menu.

Control menu

After the PIN passcode is correctly entered, the home screen of the control menu will
show for programming the mower. See the following sections for details.

46 47

OPERATION

OPERATION

Overview of the control menu

Using the control menu

There are eight options in the control menu. Refer to the relevant sections below for details.

Start

Select this option to start a mowing cycle. This option has the same function as the
START button on the control panel.

Charge

Select this option to return the mower to the charging station for charging. This
option has the same function as the HOME button on the control panel.

Settings

There are six further options in “Settings”.

• Boundary

There are three further options in “Boundary”.

48 49

OPERATION

Trimming

This option determines if the mower will carry out boundary trimming during
a mowing cycle. Select the option “Yes” to carry out boundary trimming. To
determine the width of the boundary edge, see the section: Width.

Note：The boundary cable must be carefully checked before confirming
this option. The mower may cut the boundary cable when the cable is
not properly fixed to the ground.

Width

This option determines the distance (0.1-0.4 m) the mower will run past the
boundary cable when performing boundary trimming.

Signal

This option determines which signal (S1 or S2) is using for the boundary cable.

OPERATION

• PIN

This option sets the passcode of the mower to prevent theft or unauthorised
change of the menu settings. The existing (old) passcode is required to change to
a new passcode. If you have forgotten the passcode, contact your local dealer or
after sales service.
The default passcode of the mower is “0000”.

• Rain

Mowing in the rain is not recommended.
This machine has a rain sensor which may stop the robot from mowing in the rain.
When the rain sensor is triggered, the robot will go back to the charging station
rst, where it will be fully charged. Once charged the mower will remain in the
charging station until the rain has stopped before starting to mow again.

Note: Be careful not to short circuit the sensors on the machine with any
metal objects. This will cause the mower to work abnormally.

If both you and your neighbour have the same Yard Force Robomower and the
boundary
cables between the two mowers is less than 10 m apart from each other, set the
signal (S1 or S2) of your boundary cable to a different one from your neighbour.
For example, if your neighbour’s mower is already connected through signal S1,
connect your mower to the charging station through signal S2. On the charging
station, you must also carry out the corresponding change. To set the signal to
S2 on the charging station:
Press the button again to change the signal of the charging station back to S1.

50 51

Rain sensor

Users can activate or deactivate the rain sensor as shown below:
Deactivating rain sensor:

OPERATION

Activating rain sensor:
Select "Yes" and set the extra time.

• Multiple areas

Your lawn may consists of a number of isolated mowing areas (see example
below). You may set up a maximum 4 mowing zones and assign a mowing
frequency to each of them.
Measure and estimate the distance from each zone to the charging station
along the boundary cable. The mower will identify each zone by the distance to
the charging station. Each mowing zone will also be dened by a percentage,
reecting the size of the mowing zone in relation to the total mowing area.

OPERATION

The feature is also useful when there are blind areas that the mower seldom visits.
You may nd the nearest point along the boundary cable and set it as a mowing
zone to improve the mowing frequency.

• Reset

This option sets all settings to the factory default values. The PIN passcode is
required to carry out the reset.

• Review

This option shows the current settings, including the cut days, cut times, boundary
trimming setting, boundary edge width, area and number of users.

Timer

This option sets the day and time the mower will carry out a mowing cycle. Select the
option “Date” to set the cut days and the option “Time” to set the cut times.

By inputting the distance (m) and area percentage (%) in each mowing zone,
the mower will automatically calculate the mowing frequency in each zone. The
higher it is marked with percentage value, the more frequently the mower will cut
it.

52 53

• Set cut days

This option determines on which days in a week the mower will work. By default,
all days are selected with highlights in black. To stop the mower from working on a
specic day, press the corresponding option on the display.

OPERATION

OPERATION

• Set cut time

This option determines the working periods of the mower in a day. A maximum
of three working periods (T1 to T3) can be set. Select a working period and then
use the number keys on the display for inputting the start and end times for each
working period.

If the mower runs out of battery power within a working period, it will automatically return
to the charging station for charging and then work again until the working period ends. It is
best to rst leave the working periods as factory defaults and then modify if required after
you know the time the mower takes to completely cut the lawn. Remember that the mower
may take longer time to cut the same lawn in different seasons or under different weather
conditions.

History

There are four further options in “History”.

• Cutting

This option shows the start and end times of the last two mowing cycles.

• Charge

This option shows the end times and voltages of the last two charging cycles.

• Health

This option shows an overview of the total working time and number of charging
cycles.

Language

This option determines the language used in the control menu. The languages available for
selection are: English, Swedish, German, Danish, Spanish, Finnish, French, Italian, Dutch and
Norwegian.

Date

This option sets the date and time for the control menu. Select the option “Date” to set the
current date and the option “Time” to set the current time. Use the number keys on the
display for inputs.

Note：All programmed activities and records in the mower will be based on the
date and time set in this option.

• Fault

This option shows the last 4 fault records. Error information includes:

Message Description

Low Battery The battery power is too low to get back to the charging station.
No signal There is no boundary cable signal.
Outside The mower has moved outside the mowing zone.

Trapped

Pit

Slope

Lifted The mower has either been lifted up or risen up over an obstacle.
Error(XX) See the section: Error codes.

The obstacle sensor gives continuous alert for more than
10 seconds. The mower has stopped for safety reasons.

The obstacle sensor has triggered more than 10 times in one minute. The
mower has stopped for safety reasons.

The mower has encountered a steep slope which it cannot
overcome.

54 55

Install

This option starts the test running mode.
In this mode, the mower will mow for one minute and then return to the charging
station. After one minute of charging, the mower will start mowing again. This mode
is used mainly for setup checking.

CLEANING/MAINTENANCE CLEANING/MAINTENANCE

Work that has not been described in these instructions must be carried out by a
servicing agency authorised by the manufacturer. Only use original parts.

Maintenance

Check and clean your Robomower regularly and replace worn parts if necessary. Preferably
use a dry brush, a damp cloth or a sharpened wooden piece.
Never use ushing water.
Following these maintenance instructions can extend your Robomower's service life.

Battery Life

The Robomower has a maintenance free Li-ion battery with an estimated life of more than 2
years (depending on treatment and usage).

Winter Storage

During winter, keep your mower, charging station and power supply in a dry place.
We recommend a shed, garage or preferably store it indoors.
Prepare your device for winter storage as follows:

1. Fully recharge the battery.

2. Set the main power switch to "OFF".

3. Thoroughly clean your Robomower.

4. Unplug the power supply from the mains outlet.

5. Disconnect the power supply from the charging station.

6. Disconnect the boundary wire from the charging station. Lift up the charging station, and
clean it. The boundary wire can remain outside, however it is imperative to protect the
wire against corrosion. We recommend a water-free grease or suitable sealing tape.

If available, repack the product in the original packaging.

Alternatively, our service centre offers a winter service for your device. This will include a
check-up of all parts and - if available - a software upgrade.

Preparing for spring

After winter storage, please clean the charging contacts on both the Robomower and the
charging station.
Use a ne abrasion paper or a brass brush; this will help to achieve the best charging
efciency and avoid any charging interference.

Cleaning and Maintenance

It’s important to keep your Robomower clean.
The mower will deal with slopes easier when the wheels are clean. Sharp cutting blades need
less power and create cleaner cuts.
Remember to turn off the main power switch (11) before any maintenance. Use protective
gloves when handling the blades! Never use a high pressure washer, garden hose or running
water when cleaning the device.

Cleaning the mower body

As your Robomower is battery powered you need take care when cleaning. Remove rough
dirt with a soft brush. Use a manual water spray with mild household detergent for intensive
cleaning. Wipe off any residue after cleaning with a moist rag.

56 57

CLEANING/MAINTENANCE CLEANING/MAINTENANCE

Cleaning the underside

Ensure the main power switch (11) is in OFF position. Wear protective gloves. Turn the
Robomower onto its side to expose its underside. Clean the blade disc and frame using a soft
brush or damp cloth. Rotate the blade disc to make sure that it moves freely, and check that the
blades can turn on their pivots and no grass is obstructing them.

Clean the contact pins and the charging strips

Using wire wool, metal cleaner or very ne grade emery paper, clean the contact pins and
the charging strips on your mower and charging station. Remove any debris, leaves or grass

clippings around the contact pins and charging strips to ensure efcient charging.

Reversing or replacing the blades

Your Robomower has three blades xed to the blade disk.
Unless damaged by hard obstacles, these blades can last for up to ve months with everyday
use.
Weekly inspection of the blades and the xing screws is required. Note that the blades are
double-edged. Once the rst side is blunt, loosen the xing screw. Turn the blade upside­down and x it again with the xing screw. After tightening the xing screw, verify that the
blade can rotate freely around the screw.
A set of spare blades is included with the Robomower. More are available from customer
support. The blade's spare part number is 846210.
Only use original spare parts. For best performance and avoiding imbalance, always turn or
replace all three blades at the same time.

Replacing the battery

WARNING!

Ensure the Robomower is completely shut off before cleaning, adjusting or replacing
the blades. Always wear protective gloves.

WARNING!

To ensure maximum cutting efciency and safety, always use recommended
replacement blades and blade mounting parts when replacing.

58 59

While the actual battery life will depend on usage and environmental factors, the typical
service life is several years. Spare batteries are available from customer support. To
replace the battery, please follow the instructions below.

1) Ensure the main power switch (11) is turned OFF. Clean the underside as instructed.

2) Set the Robomower to the lowest cutting height.

3) Turn the mower upside-down. Remove the 5 screws xing the battery compartment's lid.
Note one screw is partially covered by the blade protector and is only accessible through
a service hole.

4) Pull out the battery and disconnect it from the Robomower.

5) Carefully clean the lid and the edge of the battery compartment. Debris may allow
excessive water to enter the battery compartment, causing major damage to the device.

6) Connect and insert the replacement battery, close the compartment and x the lid with 5
screws. Do not turn on the Robomower before placing it back on its wheels - beware of
sharp blades!

CLEANING/MAINTENANCE TROUBLESHOOTING

Charging station

LED indicator light Connection of boundary cable

Blue Good connections
Blue (ashing) Interruption at the charging station.

When the mower is docked at the charging station, it

Red (ashing)

Blue and red (ashing) Interruption at both the charging station and cable loop.

means the mower is charging (normal).
When the mower is working, there is interruption at the
cable loop.

Display messages and common problems

Short-time storage

• Store the machine in a dry place well out of reach of children.

• Do not wrap nylon sacks around the machine, as this could result in the formation of
moisture.

Display
message

(None) Blank screen

(None)

(None)

(None)

(None) The mower is vibrating.

Description Action

The mower cannot return
to the charging station.

The mower turns around in
circle when returning to
the charging station
along the boundary cable.

The mower runs into the
mowing area of your
neighbour who is using the
same mower.

Ensure the main isolation switch is turned on.

The battery may be empty. Carry the mower to
the charging station, turn on the main isolation
switch and start charging.

If the mower is working, press any key on the
control panel. If the screen is still blank, carry it
to the charging station for charging. Once the
mower is charged, check the fault history and
rectify any problems.

Check if the boundary cable under and in front
of the charging station is a straight line.

Check if the charging station is correctly
installed.

Check if there is high power cable close to or
underneath the boundary cable. If this is the
case, avoid the area by changing the position of
the boundary cable.

Change to a boundary cable signal (S1 or S2) that
is different from your neighbour.

Check if the blade disc or blades are damaged
and replace the damaged parts.

CHARGING

Charging is in progress.

–

60 61

TROUBLESHOOTINGTROUBLESHOOTING

Display
message

ERROR

HOME

LOW
BATTERY

LIFTED

NO SIGNAL

OBSTACLE

OUTSIDE

Description Action

Wrong passcode has been
entered.

The mower is returning to
the charging station.

Battery power is low.

The mower has
been lifted upward.

The mower cannot receive
signals from the boundary
cable.

A problem occurs
at the obstacle sensors.

The mower is outside of
the boundary cable.

Enter the correct PIN passcode.

–

If the mower fails to automatically return to the
charging station, carry it to the charging station for
charging.

Check if the grass is too tall (> 60 mm) and cut
the grass with a normal mower before you start
using the mower again.

Check if the mower is free from obstructions.

Check if the LED indicator light is blue (no
interruptions). Refer to the table “Charging
station” at the beginning of this section for error
messages.

Check if the charging station is properly
connected to a power outlet.

Check if the signal of the boundary cable (S1 or
S2) of the mower is the same as the charging
station.

If you are using the mower for the rst time,
bring it close to the boundary cable.

Check that the mower is not stuck in the middle
of an obstacle.

Contact after sales service if the problem cannot
be resolved.

Check if the boundary cable is installed properly if
the mower is still inside the mowing area.

Bring the mower back inside the mowing area
and restart the mower.

If the mower runs outside of the boundary cable
at a corner, adjust and enlarge the angle to
exceed 90°.
If the mower constantly runs outside of the
boundary cable at one place, check if there is
a high power cable close to or underneath the
boundary cable. If this is the case, avoid the area
by changing the position of the boundary cable.

Display
message

TRAPPED

RUNNING

SPARE TIME

CRITICAL
SLOPE

TURNOVER

WAITING

Description Action

Remove the mower from the obstacle. This

The mower is trapped.

The mower is working. –

No work is assigned
to the mower.

The mower has
been tilted.

The mower is
overturned.

The mower is just about to
enter the sleep mode
because the battery
power is low.

warning occurs when the collision sensor has
been triggered more than 10 times within a
minute.

If the mower should be working, restart the
mower.

Program the working periods if necessary.

Check if the slope is too slippery to climb
and make corrections to the mowing area if
necessary.

Turn over the mower, bring it to a at area and
restart it.

Press any buttons on the control panel.

62 63

TROUBLESHOOTING DECLARATION OF CONFORMITY

Error codes

Code Type of message Description Action

ERROR 1 Fault

ERROR
20M

ERROR 20L Fault

ERROR 21 Fault

ERROR 22 Fault

ERROR 23 Fault

ERROR 24 Fault

ERROR 3 Fault

ERROR 4 Fault

M1_brake Warning

M2_brake Warning

I2C Warning

Fault

Error at micro-controller
core self-checking.
Error at middle boundary
signal self-checking.
Error at left boundary
signal self-checking.
Error at micro-controller
self-checking ADC0.
Error at micro-controller
self-checking ADC1.
The cutting motor cannot
run when the mower is
turned on.
The cutting motor cannot
run when the mower is
turned on.
The cutting motor stops
during use, cannot stop
when turned off, or is
overloaded.
The drive cannot stop
when the mower is
turned off.
The drive motor may be
locked.
The cutting motor may
be locked.

Internal communication
error

Power off and restart
the mower. If the
fault persists, contact
after sales service.

Refer to Error 4 and
Error 23.
Refer to Error 3 and
Error 24.
The mower will
automatically
resume
communication.

To the provisions of Council Directives

We

MEROTEC GmbH

Hanns-Martin-Schleyer-Str. 18a

47877 Willich / Germany

Declare that the product:

Machine Description: Robomower
Machine Type: SA800PRO
Charger Model: FY3201500
Function: Cutting grass

Complies with essential health and safety requirements of
the following directives:

EC Machinery Directive: 2006/42/EC
EC Directive of Electromagnetic Compatibility 2014/30/EU
EC Noise Directive 2000/14/EC & 2005/88/EC
WEEE Directive (2012/19/EU)
RoHS Directive (2011/65/EU)

Standards and technical specification referred to:

EN 60335-1:2012+A11;
EN 50636-2-107:2015;
EN 62233:2008;
EN 55014-1:2006+A1+A2;
EN 55014-2:2015
EN 61558-1:2005+A1
EN 61588-2-16:2009+A1
EN 60529 1991+A1: 2000
EN 61000-3-2:2014
EN 61000-3-3:2013
EN 50581:2012

Authorized Signatory
Date: 2017-10-11

Signature:________________________
Place: Willich
Name: Roland Menken
General Manager

MEROTEC GmbH
Hanns - Martin - Schleyer - Str. 18a,
47877 Willich, Germany

64 65