Wilo Control MS-L 2x4kW Series User manual

2539771 Ed.2-04/2015 MP
Pioneering for You
Wilo-Control MS-L 2x4kW
de Einbau- und Betriebsanleitung
en Installation and operating instructions
fr Notice de montage et de mise en service
es Instrucciones de instalación y funcionamiento
it Istruzioni di montaggio, uso e manutenzione
pt Manual de Instalação e funcionamento
nl Inbouw- en bedieningsvoorschriften
da Monterings- og driftsvejledning
sv Monterings- och skötselanvisning
 Asennus- ja käyttöohje
el Οδηγίεςεγκατάστασηςκαιλειτουργίας
hr Upute za ugradnju i uporabu
sr Uputstvo za ugradnju i upotrebu
sl Navodila za vgradnjo in obratovanje
hu Beépítési és üzemeltetési utasítás
pl Instrukcjamontażuiobsługi
cs Návodkmontážiaobsluze
sk Návodnamontážaobsluhu
ru Инструкцияпомонтажуиэксплуатации
ro Instrucţiunidemontajşiexploatare
uk Iнструкціязмонтажутаексплуатації

Fig. 1
1
2
3

Fig. 2/A
WSK
M
3~
WSK
M
1~
1~230V/50Hz
ON / OFF
Drain-Alarm 2
P1 P2
P1 P2
P1 P2
ON / ON
L N
1~230V/50Hz
U V W U V W
L N L N
120
60
0
Seconds
ON
100 K
DIP
1234567
SSM Alarm
GL
WSK
-P2
WSK
-P1 SL
10161514131211 987654321
HW
T1
1 3 5 13 A1
2 4 6 14 A2
T2 T3
L1 L2 L3 NO
L1 L2 L3 N
WSK
M
3~
WSK
M
1~
T1
1 3 5 13 A1
2 4 6 14 A2
T2 T3
L1 L2 L3 NO
ON DIP
1234567
PE
L1 L2 L3 PE
3~400V 50/60Hz
NL1 L2 L3 N
L1 N
1 2 3 4
1 2 3 4
L N PE
1~230V 50/60Hz
1/L1 3/L2 5/L3 N
2/T1 4/T2 6/T3 N
L N
1
1
6
7
5
2 2
9
9
9
4
8
33

Fig. 2/B
P1 P2
L1 L2 L3 PE
WSK
M
3~400V 50/60Hz
3~
M
1~
L1
(L)
L2
(N)
PE
WSK
M
1~230V 50/60Hz
1~
L1
(L)
L2
(N)
PE
WSK
1~230V 50/60Hz
L N
1~230V/50Hz
WA 65
WA 95
MS 1
ON / OFF
Drain-Alarm 2
P1 P2
P1 P2
P1 P2
ON / OFF ON
P1 P2
SR 802
5 6 7 9 10
ON / ON
L N
1~230V/50Hz
U
brown yellow green pink grey
brown black grey(blue)
V W
white
P1 P2
ON / OFF ON
NW 16
black brown black grey(blue) brown
30
15
0
Seconds
ON
100 K
DIP
1234567
SSM Alarm
GL
WSK
-P2
WSK
-P1 SL
10161514131211 987654321
HW
T1
1 3 5 13 A1
2 4 6 14 A2
T2 T3
L1 L2 L3 NO
WSK
M
3~
M
1~
WSK
M
1~
WSK
U
brown black grey(blue)
V W
L N L N
T1
1 3 5 13 A1
2 4 6 14 A2
T2 T3
L1 L2 L3 NO
ON DIP
1234567
PE
L1 L2 L3 N
6
7
5
2 2
4
8
33

Fig. 2/C
WSK
M
3~
WSK
M
1~
1~230V/50Hz
ON / OFF
Drain-Alarm 2
P1 P2
P1 P2
P1 P2
ON / ON
L N
1~230V/50Hz
U V W U V W
L N L N
120
60
0
Seconds
ON
100 K
DIP
1234567
SSM Alarm
GL
WSK
-P2
WSK
-P1 SL
10161514131211 987654321
HW
T1
1 3 5 13 A1
2 4 6 14 A2
T2 T3
L1 L2 L3 NO
L1 L2 L3 N
WSK
M
3~
WSK
M
1~
T1
1 3 5 13 A1
2 4 6 14 A2
T2 T3
L1 L2 L3 NO
ON DIP
1234567
PE
PE
3~400V 50/60Hz
L1 L2 L3 N
L1 N
1 2 3 4
1 2 3 4
PE
1~230V 50/60Hz
L N
6
7
5
2 2
9
9
9
4
8
33

InstallationandoperatinginstructionsWilo-ControlMS-L2x4kW 27
English
1. Introduction 28
1.1. About this document 28
1.2. Personnelqualications 28
1.3. Copyright 28
1.4. Rightsofmodication 28
1.5. Warranty 28
2. Safety 28
2.1. Instructions and safety instructions 29
2.2. General safety 29
2.3. Electrical work 29
2.4. Conduct during operation 29
2.5. Standardsandguidelinesused 30
2.6. CEmarking 30
3. Productdescription 30
3.1. Intendeduseandeldsofapplication 30
3.2. Set-up 30
3.3. Functiondescription 30
3.4. Technicaldata 30
3.5. Type key 31
3.6. Options 31
3.7. Scope of delivery 31
3.8. Accessories 31
4. Transport and storage 31
4.1. Delivery 31
4.2. Transport 31
4.3. Storage 31
4.4. Return delivery 32
5. Installation 32
5.1. General 32
5.2. Types of installation 32
5.3. Installation 32
5.4. Electrical connection 33
6. Operation and function 36
6.1. Controls 36
6.2. Button lock 37
7. Commissioning 37
7.1. Level control 37
7.2. Operationinpotentiallyexplosiveareas 37
7.3. Activating the switchgear 38
7.4. Rotation control of connected three-phase AC
motors 38
7.5. Activating automatic mode on the unit 38
7.6. Behaviour during operation 39
8. Decommissioning/disposal 39
8.1. Deactivating automatic mode on the unit 39
8.2. Temporary shutdown 39
8.3. Final shutdown 39
8.4. Disposal 39
9. Maintenanceandrepair 40
9.1. Maintenanceintervals 40
9.2. Maintenancework 40
9.3. Repairwork 40
10. Troubleshootingandpossiblesolutions 40
10.1. Acknowledgingfaults 40
10.2. Faultsignals 40
10.3. Fault memory 41
10.4. Further steps for troubleshooting 41
11. Appendix 41
11.1. System impedance tables 41
11.2. Spare parts 41

28 WILOSE04-2015V05DINA4
English INTRODUCTION
1. Introduction
1.1. About this document
The language of the original operating instruc-
tionsisGerman.Allotherlanguagesofthese
instructions are translations of the original oper-
ating instructions.
This manual is divided into individual sections,
which are listed in the table of contents. Each
sectionhasaheadingwhichclearlydescribesits
content.
A copy of the EC declaration of conformity is
acomponentoftheseoperatinginstructions.
Ifatechnicalmodicationismadeonthedesigns
named there without our agreement, this decla-
ration loses its validity.
1.2. Personnel qualications
All personnel who work on or with the switchgear
mustbequaliedforsuchwork;electricalwork,
forexample,mayonlybecarriedoutbyaqualied
electrician.Allpersonnelmustbeoflegalage.
Operating and maintenance personnel must also
observe national accident prevention regulations.
It must be ensured that personnel have read and
understood the instructions in this operating and
maintenance handbook; if necessary, this manual
must be ordered from the manufacturer in the
required language.
This switchgear is not intended for use by persons
(including children) with reduced physical, senso-
ryormentalcapabilities,orlackofexperienceand
knowledge, unless they have been given supervi-
sion or instruction concerning use of the switch-
gearbyapersonresponsiblefortheirsafety.
Children should be supervised to ensure that they
do not play with the switchgear.
1.3. Copyright
This operating and maintenance manual has been
copyrightedbythemanufacturer.Theoperating
and maintenance manual is intended for use by
installation, operating and maintenance person-
nel. It contains technical regulations and drawings
which may not be reproduced or distributed,
either in whole or in part, used for purposes of
competition or shared with third parties. Illustra-
tions may differ from the original and serve only
asexampleillustrationsofswitchgears.
1.4. Rights of modication
The manufacturer reserves the right to make
technicalmodicationstosystemsorcompo-
nents. This operation and maintenance manual
refers to the switchgear indicated on the title
page.
1.5. Warranty
Ingeneral,thespecicationsinthecurrent"gen-
eraltermsandconditions"applyforthewarranty.
Youcanndthesehere:
www.wilo.com/legal
Any deviations must be contractually agreed and
shall then be given priority.
1.5.1. General
The manufacturer is obliged to correct any de-
fects found in the switchgears it sells, provided
thattheoneormoreofthefollowingisthecase:
• The defects are caused by the materials used
or the way the product was manufactured or
designed.
• The defects were reported in writing to the man-
ufacturer within the agreed warranty period.
• The switchgear was used only as prescribed.
1.5.2. Warranty period
The duration of the warranty period is stipulated
inthe"generaltermsandconditions".
Any deviations must be contractually agreed.
1.5.3. Spare parts, attachments and modications
Only genuine spare parts from the manufacturer
may be used for repairs, replacements, attach-
mentsandmodications.Unauthorisedadd-ons
andmodicationsortheuseofnon-originalspare
parts can seriously damage the switchgear and/or
injure personnel.
1.5.4. Maintenance
The prescribed maintenance and inspection
work should be carried out regularly. This work
mayonlybecarriedoutbyqualied,trainedand
authorised personnel.
1.5.5. Damage to the product
Damage and malfunctions that endanger safety
must be eliminated immediately by trained per-
sonnel.Theswitchgearmayonlybeoperatedifit
is in proper working order.
In general, repairs should only be carried out by
Wilo customer service.
1.5.6. Disclaimer
No liability will be assumed for damage to the
switchgearifanyofthefollowingisthecase:
• The manufacturer deems that information pro-
videdbytheoperatororcustomerisinsufcient
or incorrect
• Non-compliance with safety instructions and
workinginstructionsasspeciedinthisoperating
and maintenance manual
• Improper use
• Incorrect storage and transport
• Improper assembly/dismantling
• Insufcientmaintenance
• Incorrect repairs
• Inadequate construction site or construction work
• Chemical,electrochemicalandelectricalinu-
ences
• Wear
Thismeansthemanufacturer’sliabilityexcludes
all liability for personal injury, material damage or
nanciallosses.
2. Safety
This section lists all the generally applicable
safety instructions and technical information.

InstallationandoperatinginstructionsWilo-ControlMS-L2x4kW 29
SAFETY English
Inaddition,alltheothersectionscontainspecic
safety instructions and technical information.
Allinstructionsandinformationmustbeob-
served and followed during the various phases of
the switchgear life cycle (installation, operation,
maintenance,transport,etc.)!Theoperatoris
responsible for ensuring that all personnel follow
these instructions and guidelines.
2.1. Instructions and safety instructions
This manual uses instructions and safety in-
structions for preventing injury and damage to
property.Toclearlyidentifythemforpersonnel,
the instructions and safety instructions are dis-
tinguishedasfollows:
• Instructions appear in bold and refer directly to
theprecedingtextorsection.
• Safety instructions are slightly indented and bold
andalwaysstartwithasignalword.
• Danger
Serious or fatal injuries can occur!
• Warning
Serious injuries can occur!
• Caution
Injuries can occur!
• Caution (instruction without symbol)
Substantial property damage can occur. Irrepa-
rable damage is possible!
• Safety instructions that refer to personal injury
appear in black and are always accompanied by
asafetysymbol.Danger,prohibitionorinstruc-
tion symbols are used as safety symbols.
Example:
Dangersymbol:Generalhazard
Dangersymbol,forexample,electricalcurrent
Prohibitionsymbol,forexample,Keepout!
Instructionsymbol,forexample,wearprotec-
tive clothing
The safety symbols used conform to the gener-
ally applicable directives and regulations, such
asDINandANSI.
• Safety instructions that only refer to materi-
al damage are printed in grey, without safety
symbols.
2.2. General safety
• The electricity network must be switched off
before any work is performed (installation, dis-
mantling,maintenance).Theswitchgearmustbe
disconnected from the electricity network and
secured against reactivation.
• The person operating the switchgear must notify
his or her supervisor immediately should any
faults or irregularities occur.
• Where damage occurs to electrical components,
cables and/or insulation, the switchgear must be
shut down immediately by the operator.
• Tools and other objects should be kept in their
designated places so that they can be found
quickly.
• The switchgear may not be installed in potentially
explosiveareas.Ariskofexplosionspertains.
These instructions must be strictly observed.
Non-observance can result in injury or substan-
tial material damage.
2.3. Electrical work
DANGER due to electrical voltage!
Improper procedures during electrical work
may result in fatal injuries caused by electrical
voltage! Such work may only be carried out by
aqualied electrician.
BEWARE of moisture!
Ingress of moisture will result in damage to
the switchgear. During installation and oper-
ation, pay attention to the permissible air hu-
midity and ensure the switchgear is installed
so it is overow-proof.
Our switchgears are operated with alternat-
ingorthree-phasecurrent.Thegoverning
national directives, standards and regulations
(e.g.VDE0100)aswellastherequirementsofthe
local energy supply company must be observed.
The person operating the switchgear must know
where it is supplied with power and how to cut off
thesupply.Aresidual-currentdevice(RCD)must
be provided by the customer.
Thesectionentitled"Electricalconnection"
must be observed when connecting the product.
Thetechnicalspecicationsmustbeobserved
strictly.Theswitchgearmustalwaysbegrounded.
Todothis,connecttheprotectiveearthconduc-
tor at the earth terminal indicated (;).Thecross
section of the cable for the protective earth con-
ductor must correspond to the local regulations.
If the switchgear has been switched off by
aprotective device, it must not be switched on
again until the fault has been corrected.
Use of electronic devices such as soft starters
or frequency converters is not possible with this
switchgear. Pumps must be connected directly.
2.4. Conduct during operation
When operating the switchgear, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling elec-
tricalproducts.Tohelptoensuresafeworking
practice, the responsibilities of employees should
beclearlysetoutbytheoperator.Allpersonnel
are responsible for ensuring that regulations are
observed.

30 WILOSE04-2015V05DINA4
English PRODUCT DESCRIPTION
Pushbuttons and LEDs on the housing are used
to operate the switchgear, display the operating
state,andsignalfaults.Thehousingcovermust
not be opened during operation.
DANGER due to electrical voltage!
There is arisk of fatal electric shocks oc-
curring when performing work on the open
switchgear. Only operate the switchgear with
the cover closed!
2.5. Standards and guidelines used
The switchgear is subject to various European
directives and harmonised standards. See the EC
declaration of conformity for precise information
about these.
Also,variousregulationsareusedasabasis
for operating, installation and dismantling the
switchgear.
2.6. CE marking
The CE marking is attached to the rating plate.
3. Product description
The switchgear has been manufactured with
great care and is subject to constant quality con-
trols. Trouble-free operation is guaranteed if it is
installed and maintained correctly.
3.1. Intended use and elds of application
DANGER - explosive atmosphere!
If the connected pump and signal transmitter
are used in potentially explosive areas, there
is adanger of fatal injuries from explosions!
Theconnected pump and signal transmitter
must always be used outside of potentially
explosive areas. Installation must always be
carried out by aqualied electrician.
The MS-Lift switchgear is designed for
• automaticcontrolof2nonEx-ratedpumpsin
lifting units and sewage chambers for water/sew-
age conveyance.
The switchgear must not
• beinstalledinpotentiallyexplosiveareas.
• beooded.
Intended use also includes observation of these
instructions. Any other use is considered to be
outside the intended use.
NOTE
Forautomaticcontrol,oatswitchesmustbe
provided by the customer.
3.2. Set-up
Fig. 1.: Overview of operating components
1 Main switch 3 Control panel with
buttons
2 LED indicators
The switchgear comprises the following main
components:
• Mainswitch:forswitchingtheswitchgearon/off
NOTE
• The"S"versionhasnomainswitch.Aplugis
pre-assembled instead.
• The"O"versionhasnomainswitchandnoplug.
Acorrespondingmainsdisconnectionfacility
must be provided by the customer in accord-
ance with the local regulations.
• LEDs for displaying the current operating state
(operation/fault)
• Automatic mode
• Pump operation
• High water
• Service interval indicator
• Overload fault
• Winding fault
• Monitoring of certain operating parameters
(version S only)
• Control panel with buttons
• Manual mode for each pump
• Stop
• Automatic mode
• Buzzer OFF/reset
• Contactor combinations for connecting up pumps
during direct starting, including electronic trig-
geringforexcesscurrentprotection
3.3. Function description
The microcontroller-controlled Micro Control
switchgearisdesignedforcontroloftwoxed
speed pumps with level-dependent switching.
Levelmeasurementisviaatwo-positioncontrol
withaoatswitchforeachpump,whichneeds
tobeprovidedbythecustomer.Thepumpis
activated/deactivated automatically depending
onthelllevel.Ifafollow-uptimeisrequired,
thiscanbesetviaapotentiometer.Pumpcycling
is carried out after every pumping procedure.
Onreachinghigh-waterlevel(detectedviaasep-
arateoatswitch),avisualandaudiblewarningis
emitted and forced switch-on of the pumps takes
place.Thecollectivefaultsignal(SSM)isactive.
The current operating state is indicated via LEDs
on the front side. Operation is via 5 pushbuttons
onacontrolpanelattachedattheside.
Faults are indicated visually via LEDs and audibly
viaanintegratedbuzzer.Thelasterrorisstoredin
the fault memory.
3.4. Technical data
3.4.1. Inputs
• 3digitalinputsforoatswitches(pumpbaseload
on/off, pump peak load on/off, high water)
• 2 inputs for thermal winding monitoring with
bimetallic temperature sensor. Connection of PTC
sensors is not possible!
3.4.2. Outputs
• 1 potential-free contact for SSM

InstallationandoperatinginstructionsWilo-ControlMS-L2x4kW 31
TRANSPORT AND STORAGE English
3.4.3. Switchgear
Mainsconnection: 1~230Vor3~400V
Frequency: 50/60Hz
Max.current: 12 A per pump
Powerconsumption: Contactortaut:15VA
Downtimestatus:8VA
Max.switchingcapacityP2: 4kW,AC3perpump
Max.fuseprotectionon
mainsside:
25A,slow-blow(16A*,
slow-blow)
Activationtype: Direct start-up
Ambient/operating temper-
ature: -30to+60°C
Storagetemperature: -30to+60°C
Max.relativehumidity: 50%
Protectionclass: IP 54
Controlvoltage: 24 VDC
Alarm contact switching
capacity: max.250V~,1A
Housingmaterial: Polycarbonate, UV-resistant
Housingdimensions(Wx-
HxD): 289x239x107mm
Electricalsafety: Degree of contamination II
*"S"versionwithshock-proof/CEE16plug
3.5. Type key
Example: Wilo-Control MS-L 2x4kW-M-DOL-S
MS MicroControlswitchgearforxedspeedpumps
LLevel-dependent control of the pump
2x Max.numberofpumpsthatcanbeconnected
4kW Max.permissibleratedpower(P2) per pump
M
Mainsconnection:
None=Choiceof1~230Vor3~400V
M=alternatingcurrent(1~230V)
T4=three-phasecurrent(3~400V)
DOL direct-on-line starting of pumps
S
Versionofswitchgear:
Without = standard version with main switch
S = Version for lifting units without main switch,
with cable and plug
O = Version without main switch and without
plug
3.6. Options
Byinsertingarechargeablebattery(available
as an accessory) alarm signals can be emitted
independent of the electricity network in case of
afault.Anaudibleconstanttonewillbeemitted
as an alarm.
3.7. Scope of delivery
Standard variant and "O" variant
• Switchgear
• 2xreducingsealsforthreadedcableconnection
• 2xassembledjumperwiresformainsconnection
• Installation and operating instructions
Variant "S"
• Switchgearwithconnectedcableandplug:
• 1~230V:Shockproofplug
• 3~400V:CEEphaseinverterplugwithphase
inverter
• Installation and operating instructions
3.8. Accessories
• Float switch for wastewater and sewage free of
faeces
• Float switch for abrasive sewage containing
faeces
• NiMHrechargeablebattery(9V/200mAh)for
alarmsignalstoindicateapowerfailure
• Horn230V,50Hz
• Flashlight230V,50Hz
• Signallamp230V,50Hz
Accessories have to be ordered separately.
4. Transport and storage
4.1. Delivery
On delivery, check immediately that the ship-
mentiscompleteandundamaged.Ifanyparts
are damaged or missing, the transport company
orthemanufacturermustbenotiedontheday
of delivery. Claims made after this date cannot be
recognised. Damage to parts must be noted on
the freight documentation.
4.2. Transport
Only the packaging used by the manufacturer or
supplier may be used for transport. This normally
precludes the possibility of damage occurring
duringtransportandstorage.Thepackaging
shouldbestoredinasafeplaceforreuseifthe
product is frequently used at different locations.
4.3. Storage
On delivery, switchgears may be placed into tem-
porary storage for up to 1 year until use providing
the details below are observed.
The following should be taken into consideration
forstorage:
• Placethepackagedswitchgearonarmsubsur-
face.
• Theswitchgearsmaybestoredfrom-30°Cto
+60°Catamax.relativeairhumidityof50%.
Thestoreroommustbedry.Werecommend
afrost-protectedroomforstoragewithatem-
peraturebetween10°Cand25°Candarelative
airhumidityof40%to50%.
Avoid formation of condensate!
• Seal the threaded cable connections securely to
prevent ingress of moisture.
• Connected power supply cables and attached
plugs should be protected from kinking, damage,
and moisture.

32 WILOSE04-2015V05DINA4
English INSTALLATION
BEWARE of moisture!
Ingress of moisture will result in damage to
the switchgear. During storage, pay attention
to the permissible air humidity and ensure the
switchgear is stored so it is overow-proof.
• The switchgear must be protected from direct
sunlight, heat and dust. Heat or dust can cause
damage to electrical components!
• Followingalongerperiodofstorage,theswitch-
gear should be cleaned of dust before commis-
sioning.Ifcondensatehasformed,checkthe
individual components are working properly.
Defective components must be replaced imme-
diately.
4.4. Return delivery
Switchgears which are returned to the plant must
becleanandcorrectlypackaged.Thepackaging
must protect the switchgear from damage during
transportation.Ifyouhaveanyquestions,please
contact the manufacturer.
5. Installation
In order to prevent damage to the switchgear or
serious injury during installation, the following
pointsmustbeobserved:
• Installation work – assembly and installation
of the switchgear – may only be carried out by
qualiedpersons.Thesafetyinstructionsmustbe
followed at all times.
• The switchgear must be inspected for transport
damage before carrying out any installation work.
5.1. General
For planning and operation of technical sewage
systems, observe the pertinent local regulations
and directives for sewage technology (such as
those of the German Association for Water,
Wastewater and Waste).
When adjusting level control devices, make sure
that connected pumps have the minimum water
coverage.
5.2. Types of installation
• Wall-mounted installation
5.3. Installation
DANGER due to explosive atmosphere!
The switchgear is not approved for potentially
explosive areas and must always be installed
outside of such areas! Failure to observe
this can lead to fatal injury due to explosion!
Always have the connection carried out by
aqualied electrician.
The following information must be observed
wheninstallingtheswitchgear:
• Theworkmustbecarriedoutbyaqualied
electrician.
• The installation location must be clean, dry and
freeofvibrations.Avoidexposingtheswitchgear
to direct sunlight.
• The customer must provide the power supply
cables.Thesemustbeofsufcientlengthsothat
connection to the switchgear is possible with-
out any problems (no tugging on the cable, no
kinking, no crushing). Check whether the cable
present is long enough for its cross-section and
its installation type.
• Whenusingthe"S"version,asuitablesock-
etmustbeinstalledwithina1mradiusofthe
switchgear.
• Structural components and foundations must be
ofsufcientstabilityinordertoallowtheproduct
tobexedsecurelyandfunctionally.Theopera-
tor or the supplier is responsible for provision of
the foundations and their suitability in terms of
dimensions, stability and strength.
• The following ambient conditions must be ob-
served:
• Ambient/operatingtemperature:-30...+60°C
• Max.relativehumidity:50%
• Overow-proofassembly
• Check the available consulting documentation
(installation plans, design of installation location,
wiring diagram) is complete and correct.
• Please also observe the applicable national acci-
dent prevention regulations and trade association
safety provisions.
5.3.1. Basic advice on xing the switchgear
The switchgear can be installed on various
structures (concrete wall, mounting rail etc.).
Forthisreason,thexationmaterialsprovidedby
the customer must be suitable for the relevant
structure.
Observethefollowinginstructionsforthexation
material:
• Ensure the proper edge clearance in order to
prevent the construction material from tearing or
chipping.
• The depth of the borehole depends on the length
ofthebolts.Theboreholeshouldbe5mmdeeper
than the bolt length.
• Drillingdustimpairsholdingstrength.Therefore:
Always blow or vacuum out the borehole.
• Makesurethexationmaterialisnotdamaged
during assembly.
5.3.2. Assembling the switchgear
Wall-mounted installation
Fixtheswitchgeartothewallusing4screwsand
4 anchors.
1. Open the cover on the switchgear and place this
on the intended assembly area.
2. Draw the four holes on the assembly area.
• Drillingdistances(WxH):268x188mm
• Observe the information on the underside of
the switchgear too!
3. Drilltheholesaccordingtothespecicationsfor
thexationmaterialsused.

InstallationandoperatinginstructionsWilo-ControlMS-L2x4kW 33
INSTALLATION English
4. Fixtheswitchgearusingfourscrews(max.Ø:
4mm)andappropriateanchorsontothewall.
5.3.3. Positioning of signal transmitters
For automatic control of the connected pump,
acorrespondinglevelcontroldevicemustbe
installed. This needs to be provided by the cus-
tomer.
Float switches may be used as signal transmitters.
Connection of level sensors or electrodes is not
possible!Thecorrespondingsignaltransmitters
must be installed according to the unit's installa-
tion plan.
DANGER - explosive atmosphere!
If the connected signal transmitters are used
in potentially explosive areas, there is adan-
ger of fatal injuries from explosions! Thecon-
nected signal transmitters must always be
used outside of potentially explosive areas.
Installation must always be carried out by
aqualied electrician.
Notethefollowing:
• Whenusingoatswitches,ensurethatthesecan
move freely in the operating space (pump cham-
ber, reservoir).
• The water level of the connected pump must not
fall below the minimum.
• Themaximumswitchingfrequencyofthecon-
nectedpumpmustnotbeexceeded.
5.4. Electrical connection
POTENTIALLY fatal danger due to electrical
voltage!
Incorrect electrical connections can cause fa-
tal electric shocks. Electrical connections may
only be carried out by aqualied electrician
approved by the local energy supply company,
in accordance with locally applicable regula-
tions.
DANGER - explosive atmosphere!
If the connected pump and signal transmitter
are used in potentially explosive areas, there
is adanger of fatal injuries from explosions!
Theconnected pump and signal transmitter
must always be used outside of potentially
explosive areas. Installation must always be
carried out by aqualied electrician.
NOTE
• Depending on the system's impedance and the
connectedconsumers'max.no.ofconnections/
hour,voltageuctuationsorvoltagedropsmay
occur. Always have the electrical connections
carried out by an electrician authorised by the
local energy supply company.
• Observe the installation and operating in-
structions for the connected pump and signal
transmitters.
• The mains connection current and voltage must
be as stated on the rating plate.
• All-pole disconnecting, K-type circuit breakers
must be installed!
• Max.fuseprotectiononmainsside:25A(16Afor
S version with shock-proof/CEE16 plug)
• Onswitchgearswithoutapowersupplysepa-
rationdevice(Oversion:withoutmainswitchor
plug) this must be provided by the customer!
• Itisrecommendedaresidual-current-operated
protection switch (RCD, type A, sinus wave-form
current) be installed. Observe the local laws and
regulations on this too!
• Route the power supply cable in accordance with
the valid norms and regulations and according to
the wiring diagram.
• Ground the system (switchgear and all electric
consumers) in accordance with the regulations.
Fig. 2.: Overview of individual components
A Switchgear with main switch
W Switchgear with plug
C Switchgear without main switch and plug
1 Main switch 6 DIP switch 2
2 Motor contactor 7 Potentiometer for fol-
low-up time
3 Terminal strip 8 Rechargeable battery
installation location
4 Earth terminals 9 Mains terminal strip
5 DIP switch 1
5.4.1. DIP switch
The switchgear has two DIP switches. These are
usedtoswitchvariousfunctionson/off:
• DIP switch 1, above the potentiometer
This DIP switch is used to adjust the rated current
for motor protection as well as activating or deac-
tivating the pump kick function and the internal
buzzer.
• DIP switch 2, under the potentiometer
This DIP switch is used to select the mains voltage
(standardversionand"O"versiononly),tostipu-
late the service intervals. activate/deactivate the
connected pumps and to monitor the operating
parameters (S version only).
5.4.2. Switchgear mains connection - with main
switch
Insert the cable ends of the power supply cable
laid on-site through the threaded cable connec-
tions and secure them accordingly.
Connect the wires to the main switchasfollows:
• Mainsconnection1~230V:
• Cable:3-core
• Terminals:4/T2(L),N(N)
• The protective earth conductor (PE) is connect-
ed to the earth terminal (;).
• DIPswitch2:DIPposition"1":OFF(bottom
position)

34 WILOSE04-2015V05DINA4
English INSTALLATION
NOTE
To function correctly, 2 bridges (supplied) must
beinstalledonthemainsterminalstrip:
• Terminal 1 and 2
• Terminal 3 and 4
• Mainsconnection3~400V:
• Cable:5-core
• Terminals:2/T1(L1),4/T2(L2),6/T3(L3),N(N)
• The protective earth conductor (PE) is connect-
ed to the earth terminal (;).
• DIPswitch2:DIPposition"1":ON(topposition)
• A clockwiserotatingeldmustbepresent!
5.4.3. Switchgear mains connection - with plug ("S"
version)
Inserttheplugintothesocket:
• Mainsconnection1~230V:Shock-proofsocket
• Mainsconnection3~400V:CEEsocket(aclock-
wiserotatingeldmustbepresent)
5.4.4. Switchgear mains connection - without main
switch and plug ("O" version)
Insert the cable ends of the power supply cable
laid on-site through the threaded cable connec-
tions and secure them accordingly.
Connect the wires on the mains terminal strip as
follows:
• Mainsconnection1~230V:
• Cable:3-core
• Terminals:L1(L),N(N)
• The protective earth conductor (PE) is connect-
ed to the earth terminal (;).
• DIPswitch2:DIPposition"1":OFF(bottom
position)
NOTE
To function correctly, 2 bridges (supplied) must
beinstalledonthemainsterminalstrip:
• Terminal 1 and 2
• Terminal 3 and 4
• Mainsconnection3~400V:
• Cable:5-core
• Terminals:L1(L1),L2(L2),L3(L3),N(N)
• The protective earth conductor (PE) is connect-
ed to the earth terminal (;).
• DIPswitch2:DIPposition"1":ON(topposition)
• A clockwiserotatingeldmustbepresent!
5.4.5. Pump mains connection
Insert the cable ends of the pump power supply
cables laid on-site through the threaded cable
connections and secure accordingly.
Connect wires as follows to the motor protection
fortherelevantpump(P1,P2):
• Pumpconnection1~230V,3-corecable:
• Terminals:4/T2(L),6/T3(N)
• The protective earth conductor (PE) is connect-
ed to the earth terminal (;).
NOTE
Withthe"S"versionthepumpisconnectedat
terminals 2/T1 (L), 4/T2 (N).
• Pumpconnection3~400V:
• Terminals:2/T1(U),4/T2(V),6/T3(W)
• The protective ground conductor (PE) is con-
nected to the earth terminal (;).
• A clockwiserotatingeldmustbepresent!
After the pumps have been connected correctly,
the pumps need to be activated and the motor
protection adjusted.
Activating pumps
The connected pumps have to be switched on via
DIPswitch2,DIP6and7.Thefactorysettingfor
the DIP switches is OFF. Level-control dependent
activation of pumps is not possible in this setting.
• DIP6ON:Pump1activated
• DIP7ON:Pump2activated
Adjusting the motor protection
The electronic motor protection monitors the
rated current of the connected pumps during
operation. Deactivation takes place immediately
ifthesetratedcurrentisexceeded.
NOTE
With connection of 3-phase current motors,
deactivation also occurs after 1 sec. if the rated
currentdropsbelow300mAduringoperation!
After each deactivation, the fault needs to be
acknowledgedviathe"Reset"button.
The motor protection needs to be set to the rated
current shown on the rating plate.
The desired rated current is set via DIP switch 1,
DIP1-5.Thelowestcurrentvalueis1.5Ainwhich
all DIP switches are set to OFF position. On acti-
vating the individual DIP switches (ON position),
the current value is increased by the value of the
relevant DIP switch.
DIP 12345
Current value 0.5A 1.0A 2.0A 3.0A 4.0A
Example:Requiredratedcurrent7.5A
1.5A+2.0A(DIP3)+4.0A(DIP5)=7.5A
5.4.6. Winding temperature monitoring connection
Bimetallic strips may be connected for tempera-
ture monitoring.
Monitoring is self-acknowledging, meaning that
after the motor has cooled down the error is reset
automatically and the LED goes off.
Connect the wires to the terminals for the corre-
spondingpumpattheterminalstrip:
• Pump1:Terminal1and2(WSK-P1)
• Pump2:Terminal3and4(WSK-P2)

InstallationandoperatinginstructionsWilo-ControlMS-L2x4kW 35
INSTALLATION English
NOTE
• Noexternalvoltagemaybeapplied!
• Onconnectingawindingmonitoringdevice,the
factory converter bridge must be removed!
5.4.7. Connection for level measurement signal trans-
mitter
Thelevelisdetectedusingtwooatswitches.
Connection of level sensors and electrodes is not
possible!
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Connect the wires to the terminals for the corre-
spondingpumpattheterminalstrip:
• Pump1/baseload:Terminals5and6(BL)
• Pump2/peakload:Terminals7and8(PL)
NOTE
Noexternalvoltagemaybeapplied!
5.4.8. High-water protection connection
Ahigh-wateralarmcanberealizedviaaoat
switch.Avisual(LED)andaudible(buzzer)warn-
ingarerstemittedfollowedbyforcedswitch-on
ofthepump.Thecollectivefaultsignalisalso
active.
Monitoring is self-acknowledging, meaning that
after the water level has gone down the error is
reset automatically and the LED goes off.
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Connectthewiresatterminals9and10(HW)of
the terminal strip.
NOTE
• Noexternalvoltagemaybeapplied!
• We recommend high-water protection always
be provided as additional fuse protection for the
unit.
5.4.9. Collective fault signal connection
A potential-free contact is available via the corre-
spondingterminalsforexternalsignals(e.g.horn,
ashlightoralarmunit).
• Contact:Changeovercontact
• Terminals:11,12,13
• Min.switchingcapacity:12VDC,10mA
• Max.switchingcapacity:250VAC,1A
• Incaseofanalarm,adropinvoltageandwhen
the main switch is switched off, the contact be-
tween terminals 12 and 13 is closed.
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Connect the wires according to the required
function at terminals 11, 12 and 13 of the termi-
nal strip.
DANGER due to electrical voltage!
An external voltage is applied at the terminals
for this function. This is also present at the
terminals when the main switch is switched
off! There is arisk of fatal injury! Thepower
supply must be disconnected from its source
before all work!
5.4.10. Connection of external alarm signals in case of
high water (alarm)
A potential-free contact is available via the corre-
spondingterminalsforexternalsignalsincaseof
anactivehighwateralarm(e.g.horn,ashlightor
alarm unit).
• Contact:Changeovercontact
• Terminals:14,15,16
• Min.switchingcapacity:12VDC,10mA
• Max.switchingcapacity:250VAC,1A
• In case of an alarm, the contact between termi-
nals 15 and 16 is closed.
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Connect the wires according to the required
function at terminals 14, 15 and 16 of the termi-
nal strip.
DANGER due to electrical voltage!
An external voltage is applied at the terminals
for this function. This is also present at the
terminals when the main switch is switched
off! There is arisk of fatal injury! Thepower
supply must be disconnected from its source
before all work!
5.4.11. Switching the buzzer on/off
When the buzzer is switched on, audible warnings
are also emitted in addition to the visual indicator.
The internal buzzer can be switched on/off via
DIPswitch1,DIP7:
• "ON"position:Buzzeron
• "OFF"position:Buzzeroff(factorysetting)
NOTE
If the battery for alarms that are independent
of the mains is installed, the buzzer cannot be
switchedoffusingtheDIPswitchduringapow-
er failure, when the main switch is switched off
orthemainsplugisdisconnected.Todeactivate
the buzzer, the battery must always be removed
in such cases!
5.4.12. Switching pump kick on/off
To prevent longer standstill times for the con-
nectedpumps,aperiodicaltestruncanbeper-
formed(pumpkickfunction).A2stestruntakes
placeafterastandstilltimefortheconnected
pumpsof24h.
The function can be switched on/off via DIP
switch1,DIP6:
• "ON"position:Pumpkickon
• "OFF"position:Pumpkickoff(factorysetting)

36 WILOSE04-2015V05DINA4
English OPERATION AND FUNCTION
5.4.13. Switching service interval display on/off
To increase operational reliability of the unit,
aserviceintervalindicatorcanbeswitchedon.
Afterthesetintervalhasexpired,avisualsignalis
emitted by means of the yellow LED on the front.
No audible signal is emitted and the collective
fault contact is not activated! Time is only record-
ed continuously when mains voltage is present.
Counter reset must be carried out by Wilo Cus-
tomer Service.
The function and the desired interval can be
switchedon/offviaDIPswitch2,DIP4and5:
• DIP4and5"OFF":Serviceintervaloff(factory
setting)
• DIP4ON:¼yearserviceinterval
• DIP5ON:½yearserviceinterval
• DIP4and5"ON":1yearserviceinterval
5.4.14. Switching monitoring of operating parameters
on/off (version S only)
To increase the operational reliability of the unit,
the following operating parameters can be moni-
toredontheconnectedpumps:
• Connections/h
• Connections/d
• running time/h
After the factory-set parameters have been
exceeded,avisualsignalisemittedviatheyellow
LED on the front. No audible signal is emitted and
the collective fault contact is not activated!
Counter reset must be carried out by Wilo Cus-
tomer Service.
Monitoring can be switched on/off individually via
DIPswitch2,DIP1to3:
• DIP1:Connections/h
• DIP2:Connections/d
• DIP3:Runningtime/h
Allmonitoringisdeactivatedasafactorysetting
(DIPin"OFF"position).
5.4.15. Adjusting the follow-up time
Follow-uptimeisthetimebetweentheoat
switch"OFF"signalandthepumpbeingdeacti-
vated by the switchgear.
The follow-up time is continuously adjusted via
thepotentiometer.Settingrange:
• Standardversion:0...120s
• VersionS:0...30s
• "O"version:0...120s
5.4.16. Installing the rechargeable battery
Byinsertingarechargeablebattery,alarmsignals
will be emitted independent of the electricity
network on power failure. An audible, constant
tone will be emitted as an alarm.
1. Place the rechargeable battery in the holder. Pay
attention to the correct polarity.
2. Secure the rechargeable battery using the en-
closed cable tie
NOTE
• To ensure perfect operation, the rechargeable
battery must have been fully charged prior to
insertion or have been charged for 24 h in the
switchgear.
• The capacity of the rechargeable battery will fall
if temperatures drop. This reduces the running
time of the rechargeable battery.
6. Operation and function
This section contains all information on operating
the switchgear and how it functions.
POTENTIALLY fatal danger due to electrical
voltage!
There is arisk of fatal electric shocks oc-
curring when performing work on the open
switchgear. Allwork on individual com-
ponents must be performed by aqualied
electrician.
NOTE
Followingapowersupplyinterruption,the
switchgear will automatically start up in the last
operating mode set!
6.1. Controls
The switchgear is operated on the side control
panelvia5buttons.Thecurrentoperatingstateis
indicated via 11 LEDs on the front side.
6.1.1. Main switch (standard version only)
Disconnectionfromthemainsisviaamainswitch
on the standard version.
Position"0"=switchgearOFF
Position"1"=switchgearON
NOTE
The main switch can be secured against unau-
thorisedactivation/deactivationusingalock!
6.1.2. Buttons
P1
P2
Manual mode
By pressing this button for the relevant pump
(pump 1 = P1, pump 2 = P2), the pump is switched
on independently of the level control signal.
Thepumpoperatesaslongasthebuttonisheld
down. This function is intended for test mode.
Automatic mode
By pressing this button, automatic mode is activat-
ed.Thepumpsareactivateddependingonthelevel
control signal. When the pumps are deactivated,
the pump follow-up time is taken into account.
Stop
By pressing this button, automatic mode is deacti-
vated and the switchgear is set to stand-by mode.
Thepumpsarenotcontrolleddependentonthe
level.

InstallationandoperatinginstructionsWilo-ControlMS-L2x4kW 37
COMMISSIONING English
Buzzer OFF/reset
By pressing this button, the integrated buzzer is
switchedoffduringawarningandthecollective
fault signal relay (SSM) is deactivated.
When held down for longer, the fault shown is
acknowledged and control is reenabled.
6.1.3. LED indicators
Pump-dependent LEDs are displayed in two rows
usingthesymbols.Thetoprowshowsthecurrent
state of pump 1, the lower row the current state
of pump 2.
Mains connection indicator (green)
The LED lights up when the power supply and the
control voltage are present.
Automatic mode (green)
LED ashing: Switchgear is switched on but in
stand-by mode.
LED lights up: Automatic mode is activated.
LEDdoesnotlightup:Pumpisdeactivated.
Pump operation (green)
LED ashing: Pump running during the set fol-
low-up time.
LED lights up: Pump running.
Service interval indicator / monitoring of operat-
ing parameters (yellow)
LEDlightsup:Serviceintervalhasexpired
LEDashing:Operatingparametershavebeen
exceeded
High water (red)
LED lights up: High water level reached, high water
alarm has been triggered
"Excess current" fault (red)
LED ashing: Switchgear is operating without any
load.
LED lights up:Ratedcurrenthasbeenexceeded.
"Winding monitoring" fault (red)
LED lights up: Temperature sensor has triggered.
6.2. Button lock
To prevent erroneous or unauthorised activation
ofbuttons,alockcanbeactivated.
P
1
Activating/deactivating the button lock
Simultaneously pressing down the pump 1 Manual
mode, Stop and Automatic mode buttons (for ap-
prox.1s),activates/deactivatesthebuttonlock.
AllLEDslightupforapprox.2secbywayofconr-
mation.
Ifabuttonispressedwhenthebuttonlockis
active,allLEDsalsolightupfor2sec.
NOTE
When the button lock is active, the buzzer can
be switched off and the collective fault signal
relay deactivated during an alarm signal with
the Buzzer OFF/Reset button. Faults cannot be
acknowledged nor can the control be released.
7. Commissioning
POTENTIALLY fatal danger due to electrical
voltage!
Incorrect electrical connections can cause fa-
tal electric shocks. Electrical connections may
only be inspected by aqualied electrician
approved by the local energy supply company,
in accordance with locally applicable regula-
tions.
NOTE
• Followingapowersupplyinterruption,the
switchgear will automatically start up in the last
operating mode set!
• Observe the installation and operating in-
structionsforproductsprovidedon-site(oat
switches, connected pumps) as well as the
system documentation!
The"Commissioning"sectioncontainsallthe
important instructions for operating personnel
on commissioning and operating the switchgear
safely.
Always keep this manual either by the switchgear
orinaplacespeciallyreservedforit,whereitis
accessible for all operating personnel at all times.
Allpersonsworkingonorwiththeswitchgear
must have been provided with this operating and
maintenance manual and have read and under-
stood it.
In order to prevent damage or serious injury when
commissioning the switchgear, the following
pointsmustalwaysbeobserved:
• The switchgear must be installed as described in
the “Installation” section and in accordance with
the applicable national regulations.
• The switchgear must be properly fused and
grounded.
• All unit safety devices and emergency cut-outs
must be connected and inspected to ensure that
they are working properly.
• The switchgear is suitable for use under the spec-
iedoperatingconditions.
7.1. Level control
Theoatswitchesareinstalledaccordingtothe
specicationsfortheunitandthedesiredswitch-
ing points have been set.
7.2. Operation in potentially explosive areas
The switchgear may not be installed or used in
potentiallyexplosiveareas.
Connection of monitoring devices and signal
transmittersusedwithinpotentiallyexplosive
areas is strictly prohibited.

38 WILOSE04-2015V05DINA4
English COMMISSIONING
DANGER due to explosive atmosphere!
If the switchgear or the connected pump
and signal transmitter are used in potential-
ly explosive areas, there is adanger of fatal
injuries from explosions! Theswitchgear and
connected pump and signal transmitter must
always be used outside of potentially explo-
sive areas.
7.3. Activating the switchgear
POTENTIALLY fatal danger due to electrical
voltage!
All settings need to be made on the switch-
gear components. There is arisk of fatal
electric shocks occurring when performing
work on the open switchgear. Allwork must
be carried out by aqualied electrician.
NOTE
Followingapowersupplyinterruption,the
switchgear will automatically start up in the last
operating mode set!
The following points must be checked before
activation:
• Check the installation.
• All terminals must be retightened.
• DIPswitches1and2correctlyset:
• Motor protection (DIP switch 1, DIP 1-5)
• Pump kick (DIP switch 1, DIP 6)
• Buzzer (DIP switch 1, DIP 7)
• Mainsvoltageselection(DIPswitch2,DIP1:
standardversionand"O"versiononly)
• Pumps activated (DIP switch 2, DIP 6 and 7)
• Follow-up time
If corrections are necessary, proceed as in the
section"Electricalconnection".
1. Turn main switch to ON position. On switchgears
withaplug,inserttheplugintothecorrespond-
ing socket.
2. AllLEDslightupfor2sec.
3. The switchgear is ready for operation.
• The"on"LEDlightsupconstantly.
• The"auto"LEDashes:Theswitchgearisin
stand-by mode, automatic mode is off.
• The"auto"LEDlightsup:Theswitchgearisactive,
automaticmodeison.Tosettheswitchgearto
stand-by mode, press the Stop button.
NOTE
If an audible signal is sounded after activation
andallLEDsashanti-clockwiseinturn(inlight
sequence),thereisaphasefaultinthemains
connection. Follow the instructions under “Ro-
tationcontrol"forthis.
7.4. Rotation control of connected three-phase AC
motors
Inthefactory,aswitchgearforaclockwise
rotatingeldischeckedforcorrectdirectionof
rotation and set.
Observe the wire designations on the wiring
diagram when connecting the switchgear and the
connected pumps.
7.4.1. Checking the direction of rotation
The rotation control of the connected pump can
beperformedusingabrieftestrun,max.2min-
utes.
1. Pressthe"Manual"buttononthecontrolpanel
for the relevant pump.
2. The pump operates as long as the button is held
down.
BEWARE of damage to the pump
A test run of the connected pump should only
be performed under the permissible operating
conditions. Forthis, observe the installation
and operating instructions for the pump and
ensure that the required operating conditions
are complied with.
7.4.2. If the direction of rotation is not correct
After activation, an audible signal sounds and all
LEDs ash in turn anti-clockwise:
The switchgear is incorrectly connected and the
connected pump is not operating correctly.
2 phases/conductors of the power supply on
mains side to the switchgear need to be swapped
over.
Pump running incorrectly:
Connection of the switchgear is correct. Con-
nection of the pump is incorrect. 2 phases of the
mains supply to the pump supply line need to be
swapped.
7.5. Activating automatic mode on the unit
Before automatic mode is switched on, check the
settings for the switching level and follow-up
time.
If all settings have been checked, you can switch
the unit on.
1. Pressthe"auto"buttononthecontrolpanel.
2. The"auto"LEDlightsupandtheunitnowruns
inautomaticmode.Assoonastheoatswitch-
esprovideacorrespondingsignal,thepumpis
activated
• "Base-loadpumpON"level:Iftheswitch-onlevel
isreached,pump1switchesonandthe"Pump
operation"LEDlightsuppermanently.
• "Peak-loadpumpON"level:Iftheswitch-onlevel
isreached,pump2switchesonandthe"Pump
operation"LEDlightsuppermanently.
• "Peak-loadpumpOFF"level:Iftheofflevelis
reached, the peak-load pump is switched off im-
mediately.The"Pumpoperation"LEDgoesout.
• "Base-loadpumpOFF"level:Iftheofflevelis
reached, the follow-up time set is active. During
thefollow-uptime,the"Pumpoperation"LED
ashes.Oncethefollow-uptimehasexpired,
thebase-loadpumpswitchesoffandthe"Pump
operation"LEDgoesout.

InstallationandoperatinginstructionsWilo-ControlMS-L2x4kW 39
DECOMMISSIONING/DISPOSAL English
• Pump cycling between the base-load and the
peak-load pump is carried out after each pump-
ing procedure.
NOTE
High-water protection is active in automatic
mode. When the switch-on level for high-water
protectionisreached,thefollowingoccurs:
• forced switch-on of the pumps.
• avisual warning, the High water LED, lights up
constantly.
• anaudiblewarningisemittedviaaconstant
tone.
• acollective fault signal contact (SSM) is acti-
vated.
• anexternalhighwateralarm.
7.6. Behaviour during operation
When operating the switchgear, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling electri-
cal products.
To help to ensure safe working practice, the
responsibilities of employees should be clearly set
outbytheoperator.Allpersonnelareresponsible
for ensuring that regulations are observed.
Check the settings at regular intervals as to
whether they meet the current requirements.
Thesettingsmayneedtobeadjusted.
8. Decommissioning/disposal
All work must be carried out with the greatest
care.
8.1. Deactivating automatic mode on the unit
1. Pressthe"Stop"buttononthecontrolpanel.
2. The"Pumpoperation"LEDgoesout.
3. The"auto"LEDashes
4. The switchgear is in stand-by mode.
NOTE
High-water protection is not active in standby
mode. When the switch-on level for high-water
protectionisreached,thefollowingoccurs:
• forced switch-on of the pumps.
• avisual and audible warning
• The collective fault signal contact (SSM) is
activated.
• anexternalhighwateralarm.
8.2. Temporary shutdown
For temporary deactivation, the control is
switched off and switchgear is switched off via
the main switch.
The switchgear and the unit are now ready for
operationatanytime.Thedenedsettingsare
stored retentively in the switchgear and are not
discarded.
Make sure that the ambient conditions are ob-
servedaccordingly:
• Ambient/operatingtemperature:-30...+60°C
• Airhumidity:40...50%
Prevent formation of condensate!
BEWARE of moisture!
Ingress of moisture will result in damage to
the switchgear. During standstill time, pay
attention to the permissible air humidity and
ensure the switchgear is stored so it is over-
ow-proof.
1. Pressthe"Stop"button.
2. Waituntilthe"Pumpoperation"LEDgoesout.
3. The"auto"LEDashes.
4. Switch off the switchgear using the main switch
("OFF"position).
5. The"On"LEDgoesout.
8.3. Final shutdown
POTENTIALLY fatal danger due to electrical
voltage!
Incorrect procedures can cause fatal electric
shocks. This work may only be carried out by
aqualied electrician approved by the local
power supplier, in accordance with locally
applicable regulations.
1. Pressthe"Stop"button.
2. Waituntilthe"Pumpoperation"LEDgoesout.
3. The"auto"LEDashes.
4. Switch off the switchgear using the main switch
("OFF"position).Onswitchgearswithaplug,
remove the plug from the socket.
5. The"On"LEDgoesout.
6. Switch off the entire unit so it is voltage-free and
secure it against accidental activation.
7. If the terminal for the collective fault signal is oc-
cupied,theexternalvoltagesourcepresentthere
must also be switched so it is voltage-free.
8. IftheterminalfortheexternalSSMalarmisoc-
cupied,theexternalvoltagesourcepresentthere
must also be switched so it is voltage-free.
9. Disconnect all power supply cables and pull these
out of the threaded cable connections.
10. Connect the ends of the power supply cables so
that no moisture can enter into the cable.
11. Dismount the switchgear by undoing the screws
on the substructure.
8.3.1. Return delivery/storage
For shipping purposes, the switchgear must be
packaged so it is protected against knocks and
waterproof.
Please also refer to the “Transport and storage”
section.
8.4. Disposal
Proper disposal of this product avoids damage to
the environment and risks to personal health.
• Use the services of public or private waste dis-
posal companies, or consult them for the disposal
of the product or parts thereof.
• More information about proper disposal can be
obtained from the municipal authorities, the

40 WILOSE04-2015V05DINA4
English MAINTENANCE AND REPAIR
waste disposal authorities, or the supplier from
whom the product was purchased.
9. Maintenance and repair
POTENTIALLY fatal danger due to electrical
voltage!
There is arisk of fatal electric shocks oc-
curring when performing work on the open
switchgear. During all work, the switchgear
must be disconnected from the electricity
network and secured against reactivation
without permission. Allelectrical work must
be carried out by aqualied electrician.
After completing maintenance or repair work,
the switchgear must be connected according to
the “Installation” section and activated as under
"Commissioning".
Maintenance or repair work and/or con-
structional changes that are not listed in this
operating and maintenance manual may only be
carried out by the manufacturer or by author-
ised service centres.
9.1. Maintenance intervals
To ensure reliable operation, various maintenance
tasks must be carried out regularly.
NOTE
When used in sewage lifting units inside build-
ings or on land plots, the maintenance intervals
andworkshowninDINEN12056‐4mustbe
adhered to.
Before initial commissioning or after alonger
period of storage:
• Clean the switchgear
Yearly
• Visual inspection of individual components
9.2. Maintenance work
Prior to maintenance work, the switchgear must
beswitchedoffasdescribedunder"Temporary
shutdown".Maintenanceworkmayonlybecar-
riedoutbyqualiedpersons.
9.2.1. Clean the switchgear
Useadampcottonclothtocleantheswitchgear.
Do not use any aggressive or scouring cleaners
or uids!
9.2.2. Visual inspection of individual components
Have the individual components checked for wear
byaqualiedelectricianorWiloCustomerService
(e.g.meltingofprotectivecontacts,deformation
of plastic parts).
Ifseverewearisidentied,havetheaffected
componentsreplacedbyaspecialistelectricianor
Wilo Customer Service.
9.3. Repair work
Prior to repair work, the switchgear must be
switchedoffasdescribedunder"Finalshutdown"
and all power supply cables dismantled. Repair
work must be carried out by an authorised service
centre or Wilo Customer Service.
10.Troubleshooting and possible solutions
DANGER due to electrical voltage!
Improper procedures during electrical work
may result in fatal injuries caused by electrical
voltage! Such work may only be carried out by
aqualied electrician.
Potential faults are indicated visually and audibly.
According to the fault shown, the connected
pump or signal transmitter must be checked for
correct operation and replaced if necessary.
Onlyperformthisworkifsuitablyqualied
personnel are available. Electrical work must be
carriedoutbyqualiedelectriciansforinstance.
We recommend always having this work carried
out by Wilo Customer Service.
Unsanctionedmodicationstotheswitchgearare
made at the operator's own risk and release the
manufacturer from any warranty obligations.
10.1. Acknowledging faults
Afterafaultoccurs,avisualandaudiblewarningis
output.
BybrieypressingtheBuzzerOFF/resetbutton,
the audible alarm is deactivated and collective fault
signal relay (SSM) acknowledged.
When held down for longer (min. 1 sec), the fault is
acknowledged and the control is reenabled.
A fault can only acknowledged once it has been
eliminated!
10.2. Fault signals
LED lights up yellow
Cause:Thesetserviceintervalhasexpired
Solution:Performmaintenanceontheunitandhave
the counter reset by Wilo Customer Service
LED ashes yellow
Cause:Themonitoredoperatingparametershave
beenexceeded
Solution:Checkthesettingsontheunitandhave
the counter reset by Wilo Customer Service
LED lights up red
Cause:permittedratedcurrenthasbeenexceeded,
excesscurrentreleasehasbeeninitiated
Solution: Check pump and setting of DIP switch 1
LED ashes red
Cause:Ratedcurrentbelow300mAduringopera-
tion or phase L2 missing
Solution: Check mains connection of switchgear
and pump connection

InstallationandoperatinginstructionsWilo-ControlMS-L2x4kW 41
APPENDIX English
LED lights up red
Cause: Winding temperature monitoring has been
triggered
Solution: Check pump and wiring (converter bridge
may be missing); check pump operating conditions
LED lights up red
Cause: High-water alarm has been triggered.
Solution: Check pump/unit operating conditions
and level settings
All LEDs light up simultaneously for 2sec.
Cause: Button lock active
Solution: Deactivate the button lock by simulta-
neously pressing down the Manual Mode, Stop and
AutomaticModebuttons(forapprox.1s).
All LEDs light up from right to left.
Cause: Incorrect phase sequence in mains connec-
tion
Solution: Swap over 2 phases in the switchgear's
mains connection
10.3. Fault memory
Theswitchgearhasafaultmemory.Thelastfault
is stored retentively in the fault memory.
Opening the fault memory
By pressing down the Stop and Automatic Mode
buttons simultaneously, the last fault is indicated
by the corresponding LED.
P1
Deleting the fault memory
The fault memory is deleted by simultaneously
pressingandholdingdown(forapprox.1s)the
pump 1 Manual Mode and Stop buttons.
10.4. Further steps for troubleshooting
If the points listed here do not rectify the fault,
contact Wilo Customer Service. They can help you
asfollows:
• Telephone and/or written support from Wilo
Customer Service
• On-site support from Wilo customer service
• Inspection or repair of the switchgear at the
factory
Please note that you may be charged for some
services provided by our customer service.
Formoredetails,pleasecontactWiloCustomer
Service.
11.Appendix
11.1. System impedance tables
System impedances for 1~230 V, 2-pole, direct starting
Power System impedance Connections/h
kW ohms
1.5 0.4180 6
2.2 0.2790 6
1.5 0.3020 24
2.2 0.1650 24
1.5 0.2720 30
System impedances for 1~230 V, 2-pole, direct starting
Power System impedance Connections/h
kW ohms
2.2 0.1480 30
System impedances for 3~400 V, 2-pole, direct starting
Power System impedance Connections/h
kW ohms
2.2 0.2788 6
3.0 0.2000 6
4.0 0.1559 6
2.2 0.2126 24
3.0 0.1292 24
4.0 0.0889 24
2.2 0.1915 30
3.0 0.1164 30
4.0 0.0801 30
System impedances for 3~400 V, 4-pole, direct starting
Power System impedance Connections/h
kW ohms
3.0 0.2090 6
4.0 0.1480 6
2.2 0.2330 24
3.0 0.1380 24
4.0 0.0830 24
2.2 0.2100 30
3.0 0.1240 30
4.0 0.0740 30
11.2. Spare parts
Spare parts can be ordered from Wilo Customer
Service.Toavoidreturnqueriesandincorrector-
ders, the serial and/or article number must always
be supplied.
Subject to change without prior notice!