BA 551 - Industrial Cleaner NILFISK - Free user manual and instructions

USER MANUAL BA 551 NILFISK

The undersigned certify that the above mentioned model is produced in accordance with the following directives and standards.

O KATWU UTOYEVPAUMEVOIIOITOMOEI OTI N TAPAYWU TOU TPOAVAPEPHEVTOG MOVTELAUYIVETAI OUIPOWVAUEVIACKOLAUEGOONYIECKAI TPOTUTTA.

Manufacturer: Nilfisk-Advance S.p.A.

Authorized signatory: Franco Mazzini, General Mgr

Date:

Signature:

INHALTSVERZEICHNIS

EINLEITUNG 2

GERÄT IN BETRIEB (WASCHEN/TROCKNEN) 18

TANKS ENTLEEREN 20

GERÄT IN BETRIEB (WASCHEN/TROCKNEN)

CONSERVATION DU MANUEL 2

DECLARATION DE CONFORMITE 2

DONNEES D'IDENTIFICATION 2

STRUCTURE DE LA MACHINE 6

TABLEAU DE BORD 8

ACCESSIONS / OPTIONS 9

CHARACTERISTIQUES TECHNIQUES 9

SCHEMA ELECTRIQUE POUR BA 551 11

SCHEMA ELECTRIQUE POUR BA 451D ET BA 531D 12

UTILISATION 13

CONTROLE / PREPARATION DES BATTERIES SUR UNE MACHINE NEUVE 13

INSTALLATION DES BATTERIES ET CONFIGURATION DU TYPE DE BATTERIES (WET OU GEL) 14

AVANT LA MISE EN MARCHE DE LA MACHINE 15

MISE EN MARCHE ET ARRET DE LA MACHINE 18

MACHINE AU TRAVAIL (LAVAGE / SECHAGE) 18

VIDANGE DES RESERVOIRS 20

APRES L'UTILISATION DE LA MACHINE 21

INACTIVITE PROLONGEE DE LA MACHINE 21

PREMIERE PERIODE D'UTILISATION 21

ENTRETIEN 21

PLAN D'ENTRETIEN PROGRAMME 21

CHARGEMENT DES BATTERIES 22

CONTROLE DES HEURES DE TRAVAIL DE LA MACHINE 23

NETTOYAGE DE L'EMBOUCHURE 23

CONTROLE ET REMPLACEMENT DES LAMELLES EN CAOUTCHOUC DE L'EMBOUCHURE 24

NETTOYAGE DES BROSSES / DISQUES 25

NETTOYAGE DES RESERVOIRS, DE LA GRILLE D'ASPIRATION AVEC FLOTTEUR ET CONTROLE DU JOINT

D'ETANCHEITE DU COUVERCLE 25

NETTOYAGE DU FILTRE DU MOTEUR DU SYSTEME D'ASPIRATION 26

NETTOYAGE DU FILTRE DE LA SOLUTION 26

CONTROLE / REMPLACEMENT DES FUSIBLES 27

DEPOSE / REPOSE DE LA TETE PORTE-BROSSES / PLATEAUX SUPPORT DISQUE / PORTE-BROSSES

CYLINDRIQUES 28

NETTOYAGE DU RESERVOIR DU DETERGENT 29

VIDANGE SYSTEME ECOFLEX™ 29

DEPISTAGE DES PANNES 30

MISE A LA FERRAILLE 30

INTRODUCTION

REMARQUE

CONSERVATION DU MANUEL

STRUCTURE DE LA MACHINE

ACCESSIONS / OPTIONS

Bouton-poussoir EcoFlex™

MANUAL PURPOSE AND CONTENTS 2

TARGET 2

HOW TO KEEP THIS MANUAL 2

DECLARATION OF CONFORMITY 2

IDENTIFICATION DATA. 2

OTHER REFERENCE MANUALS 3

SPARE PARTS AND MAINTENANCE 3

CHANGES AND IMPROVEMENTS 3

ACCESSIONS/OPTIONS 9

TECHNICAL DATA. 9

WIRING DIAGRAM FOR BA 551 11

WIRING DIAGRAM FOR BA 451D AND BA 531D 12

USE 13

BATTERY CHECK/SETTING ON A NEW MACHINE 13

BATTERY INSTALLATION AND BATTERY TYPE SETTING (WET OR GEL) 14

BEFORE MACHINE START-UP 15

MACHINE START AND STOP 18

MACHINE OPERATION (SCRUBBING/DRYING) 18

TANK EMPTYING 20

AFTER USING THE MACHINE 21

MACHINE LONG INACTIVITY 21

FIRST PERIOD OF USE 21

MAINTENANCE 21

SCHEDULED MAINTENANCE TABLE 21

BATTERY CHARGING 22

MACHINE WORKING HOUR CHECK 23

SQUEEGEE CLEANING 23

SQUEEGEE BLADE CHECK AND REPLACEMENT 24

BRUSH/PAD CLEANING 25

TANK AND VACUUM GRID WITH FLOAT CLEANING, AND COVER GASKET CHECK 25

VACUUM SYSTEM MOTOR FILTER CLEANING 26

SOLUTION FILTER CLEANING 26

FUSE CHECK/REPLACEMENT 27

BRUSH/PAD-HOLDER/CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY 28

DETERGENT TANK CLEANING 29

The numbers in brackets refer to the components shown in Machine Description chapter.

MANUAL PURPOSE AND CONTENTS

The purpose of this Manual is to provide the operator with all necessary information to use the machine properly, in a safe and autonomous way. It contains information about technical data, safety, operation, storage, maintenance, spare parts and disposal. Before performing any procedure on the machine, the operators and qualified technicians must read this Manual carefully. Contact Nilfisk in case of doubts regarding the interpretation of the instructions and for any further information.

TARGET

This Manual is intended for operators and technicians qualified to perform the machine maintenance.

The operators must not perform procedures reserved for qualified technicians. Nilfisk will not be answerable for damages coming from the non-observation of this prohibition.

HOW TO KEEP THIS MANUAL

The User Manual must be kept near the machine, inside an adequate case, away from liquids and other substances that can cause damage to it.

DECLARATION OF CONFORMITY

The Declaration of Conformity, supplied with the machine, certifies the machine conformity with the law in force.

NOTE

Two copies of the original declaration of conformity are provided together with the machine documentation.

IDENTIFICATION DATA

The machine model and serial number are marked on the plate (34).

The machine production year is written in the declaration of conformity and it is also indicated by the first two figures of the machine serial number.

This information is useful when requiring machine spare parts. Use the following table to write down the machine identification data.

MACHINE model

MACHINE serial number

OTHER REFERENCE MANUALS

Electronic Battery Charger Manual (if equipped), to be considered as integral part of this Manual

Moreover, the following Manuals are available:

Service Manual (that can be consulted at Nilfisk Service Centers)

• Spare Parts List (supplied with the machine)

SPARE PARTS AND MAINTENANCE

All necessary operating, maintenance and repair procedures must be performed by qualified personnel or by Nilfisk Service Centers.

Only original spare parts and accessories must be used.

Contact Nilfisk for service or to order spare parts and accessories, specifying the machine model and serial number.

CHANGES AND IMPROVEMENTS

Nilfisk constantly improves its products and reserves the right to make changes and improvements at its discretion without being obliged to apply such benefits to the machines that were previously sold.

Any change and/or addition of accessory must be approved and performed by Nilfisk.

These scrubber-dryers are used to clean (scrubbing and drying) smooth and solid floors, in civil or industrial environment, under safe operation conditions by a qualified operator.

The scrubber-dryers cannot be used for fitted carpet and carpet cleaning.

CONVENTIONS

Forward, backward, front, rear, left or right are intended with reference to the operator's position, that is to say in driving position with the hands on the handlebar (2).

UNPACKING/DELIVERY

To unpack the machine, carefully follow the instructions on the packing.

When the machine is delivered, check that the packing and the machine were not damaged during transportation. In case of visible damages, keep the packing and have it checked by the carrier that delivered it. Call the carrier immediately to fill in a damage claim.

Check that the machine is equipped with the following features:

1. Technical documents:

2. Scrubber-dryer User Manual
   Electronic Battery Charger Manual (if equipped)

3. Scrubber-dryer Spare Parts List

4. No. 1 connector for battery charger (for machines without on board battery charger)

5. No. 2 lamellar fuses

SAFETY

The following symbols indicate potentially dangerous situations. Always read this information carefully and take all necessary precautions to safeguard people and property.

The operator's cooperation is essential in order to prevent injury. No accident prevention program is effective without the total cooperation of the person responsible for the machine operation. Most of the accidents that may occur in a factory, while working or moving around, are caused by failure to comply with the simplest rules for exercising prudence. A careful and prudent operator is the best guarantee against accidents and is essential for successful completion of any prevention program.

SYMBOLS

DANGER!

It indicates a dangerous situation with risk of death for the operator.

WARNING!

It indicates a potential risk of injury for people or damage to objects.

CAUTION!

It indicates a caution or a remark related to important or useful functions. Pay careful attention to the paragraphs marked by this symbol.

NOTE

It indicates a remark related to important or useful functions.

CONSULTATION

It indicates the necessity to refer to the User Manual before performing any procedure.

GENERAL INSTRUCTIONS

Specific warnings and cautions to inform about potential damages to people and machine are shown below.

DANGER!

Before performing any maintenance, repair, cleaning or replacement procedure disconnect the battery connector and remove the ignition key.
- This machine must be used by properly trained operators only. Children or disabled people cannot use this machine.
- Keep the battery away from sparks, flames and incandescent material. During the normal operation explosive gases are released.
- Do not wear jewels when working near electrical components.
- Do not work under the lifted machine without supporting it with safety stands.
- Do not operate the machine near toxic, dangerous, flammable and/or explosive powders, liquids or vapours: This machine is not suitable for collecting dangerous powders.
- Battery charging produces highly explosive hydrogen gas. Keep the tank assembly open during battery charging and perform this procedure in well-ventilated areas and away from naked flames.

WARNING!

• Carefully read all the instructions before performing any maintenance/repair procedure.
  Before using the battery charger, ensure that frequency and voltage values, indicated on the machine serial number plate, match the electrical mains voltage.
• Do not pull or carry the machine by the battery charger cable and never use the battery charger cable as a handle. Do not close a door on the battery charger cable, or pull the battery charger cable around sharp edges or corners. Do not run the machine on the battery charger cable.
• Keep the battery charger cable away from heated surfaces.
• Do not use the machine if the battery charger cable or plug is damaged. If the machine is not working as it should, has been damaged, left outdoors or dropped into water, return it to the Service Center.

WARNING!

• Carefully read all the instructions before performing any maintenance/repair procedure.
  Before using the battery charger, ensure that frequency and voltage values, indicated on the machine serial number plate, match the electrical mains voltage.
• Do not pull or carry the machine by the battery charger cable and never use the battery charger cable as a handle. Do not close a door on the battery charger cable, or pull the battery charger cable around sharp edges or corners. Do not run the machine on the battery charger cable.
• Keep the battery charger cable away from heated surfaces.
• Do not use the machine if the battery charger cable or plug is damaged. If the machine is not working as it should, has been damaged, left outdoors or dropped into water, return it to the Service Center.
• To reduce the risk of fire, electric shock, or injury, do not leave the machine unattended when it is plugged in. Before performing any maintenance procedure, disconnect the battery charger cable from the electrical mains.
• Do not smoke while charging the batteries.
• To avoid any unauthorised use of the machine, remove the ignition key (if equipped).
• Do not leave the machine unattended without being sure that it cannot move independently.
• Always protect the machine against the sun, rain and bad weather, both under operation and inactivity condition. Store the machine indoors, in a dry place: This machine must be used in dry conditions, it must not be used or kept outdoors in wet conditions.
  Before using the machine, close all doors and/or covers.
• Do not allow to be used as a toy. Close attention is necessary when used near children.
• Use only as shown in this Manual. Use only Nilfisk's recommended accessories.
  Take all necessary precautions to prevent hair, jewels and loose clothes from being caught by the machine moving parts.
• Do not use the machine on slopes with a gradient exceeding the specifications.
• Do not use the machine in particularly dusty areas.
• While using this machine, take care not to cause damage to people or objects.
• Do not bump into shelves or scaffoldings, especially where there is a risk of falling objects.
• Do not lean liquid containers on the machine, use the relevant can holder.
• The machine working temperature must be between 0^ and +40^ .
• The machine storage temperature must be between 0^ C and +40^ C .
  The humidity must be between 30% and 95% .
• When using floor cleaning detergents, follow the instructions on the labels of the detergent bottles.
• To handle floor cleaning detergents, wear suitable gloves and protections.
• Do not use the machine as a means of transport.
• Do not allow the brushes to operate while the machine is stationary to avoid damaging the floor.
  In case of fire, use a powder fire extinguisher, not a water one.
• Do not tamper with the machine safety guards and follow the ordinary maintenance instructions scrupulously.
• Do not allow any object to enter into the openings. Do not use the machine if the openings are clogged. Always keep the openings free from dust, hairs and any other foreign material which could reduce the air flow.
• Do not remove or modify the plates affixed to the machine.
• (Only for BA 551D, BA 551CD, BA 611D): When the machine is to be pushed for service reasons (missing or discharged batteries, etc.), the speed must not exceed 4km/h .
• This machine cannot be used on roads or public streets.
• Pay attention during machine transportation when temperature is below freezing point. The water in the recovery tank or in the hoses could freeze and seriously damage the machine.
• Use brushes and pads supplied with the machine and those specified in the User Manual. Using other brushes or pads could reduce safety.
  In case of machine malfunctions, ensure that these are not due to lack of maintenance. Otherwise, request assistance from the authorised personnel or from an authorised Service Center.
  If parts must be replaced, require ORIGINAL spare parts from an Authorised Dealer or Retailer.
  To ensure machine proper and safe operation, the scheduled maintenance shown in the relevant chapter of this Manual, must be performed by the authorised personnel or by an authorised Service Center.
• Do not wash the machine with direct or pressurised water jets, or with corrosive substances.
• The machine must be disposed of properly, because of the presence of toxic-harmful materials (batteries, etc.), which are subject to standards that require disposal in special centres (see Scrapping chapter).

MACHINE DESCRIPTION

MACHINE STRUCTURE

1. Control panel
2. Handlebar
3. Drive paddle (*)
4. Drive speed adjuster (*)
5. Battery charger data inspection window (optional)
6. Battery charger cable (optional)
7. Battery charger cable holder (optional)
8. Recovery water drain hose plug
9. Water removable filler hose (optional)
10. Squeegee lifting/lowering lever
11. Deck lifting/lowering pedal
    11a. Pedal position when deck is lifted
    11b. Pedal position when deck is lowered
    11c. Extra pressure activation (optional)
12. Battery connector (red). This connector also works as EMERGENCY push-button, to stop immediately all functions.
13. Rear steering wheel
14. Driving wheels (). Front wheels on fixed axle (**)
15. Squeegee vacuum hose
16. Recovery water drain hose
17. Solution/clean water drain and level check hose
    18a. Deck with one brush/pad-holder
    18b. Deck with two brushes/pad-holders
    18c. Deck with two cylindrical brushes
    19a. Brushes/pad-holders
    19b. Cylindrical brushes
18. Solution/clean water tank
19. Recovery tank
20. Recovery tank cover
21. Can holder
22. Document fastener (optional)
23. Squeegee
24. Squeegee mounting handwheels

25. Squeegee adjusting handwheel

26. Machine straight forward movement adjusting handwheel

27. Machine forward speed adjusting handwheel (^**)
    30a. Recovery tank cover (opened to be cleaned)
    30b. Recovery tank cover (completely opened)
28. Tank cover gasket
29. Cover movable retaining plate
30. Cover fixed retaining plate (do not remove!)
31. Serial number plate/technical data/conformity certification
32. Plug for squeegee vacuum hose cleaning
33. Vacuum grid with automatic shut-off float
34. Solution front filler neck
35. Foam filter
36. Compensation hole
37. Recovery tank (open)
38. Tank lifting handle
39. Tank safety cable
40. Vacuum system motor cover
41. Vacuum system motor sound-deadening filter
42. Detergent tank (^**)
43. Detergent tank filler plug (^**)
44. Detergent tank handle (^**)
45. Detergent feed hose (^**)
46. Detergent pump (^**)
47. Water pump (^**)
48. Clean water filter (^**)
49. Batteries
50. Battery caps
51. Solution filter (^**)
52. Solution/clean water tap
53. Solenoid valve
54. Reference table for detergent proportioning (^**)
55. Battery connection diagram
    () Only for BA 551D, BA 551CD, BA 611D
    () Only for machine with EcoFlex™ system (optional)
    (^*) Only for BA 551

S311310

CONTROL PANEL

1. Brush/pad-holder and vacuum system switch
2. Brush/pad-holder and vacuum system switch warning light
3. Vacuum system switch
4. Vacuum system switch warning light
5. Brush/pad-holder release switch (*)
6. Brush/pad-holder release switch warning light (*)
7. Washing detergent flow control switch (^**)
8. Washing detergent flow control switch warning light (^**)
9. Hour counter (optional)
10. Ignition key (0 - 1) (*)
11. Battery charge indicator

81a. Charged battery warning light (green)
81b. Semi-discharged battery warning light (yellow)
81c. Discharged battery warning light (red)
82. Solution flow control switches
82a. Flow increase switch
82b. Flow decrease switch
82c. Solution flow indicator
83. EcoFlex™ system switch (^)
84. EcoFlexTM system switch led indicator (^)

Led ON - EcoFlex™ system ON
- Led flashing - EcoFlex™ system override

1. Detergent concentration level display (^**)

() Only for BA 551D, BA 551CD, BA 611D
(^*) Only for machine with EcoFlexTM system (optional)

S311311

S311312

BATTERY CHARGER DATA INSPECTION WINDOW (optional)

1. Electronic battery charger
2. Lead (WET) or gel (GEL) battery selector
3. Green warning light (the battery charger is on and batteries are charged)
4. Yellow warning light (the battery charger is on and batteries are semi-discharged)
5. Red warning light (the battery charger is on and it is charging the batteries)

S311313

ACCESSORIES/OPTIONS

In addition to the standard components, the machine can be equipped with the following accessories/options, according to the machine specific use:

1. GEL batteries
2. Electronic battery charger
3. Brushes and cylindrical brushes of different materials
4. Pads of different materials
5. Polyurethane squeegee blades
6. EcoFlexTM
7. Front and rear wheels of different materials
8. Hour counter
9. Solution/clean water removable filler hose
10. Pocket

For further information concerning the optional accessories, contact an authorised Retailer.

TECHNICAL DATA

General technical data

Model	BA 551 1 brush/pad-hold- er, without drive system	BA 551D 1 brush/pad- holder, with drive system	BA 551CD 2 cylindrical brushes, with drive system	BA 611D 2 brushes/pad- holders, with drive system
Machine height	1,088 mm
Solution/clean water tank capacity	58 litres
Recovery tank capacity	60 litres
Front wheel diameter	250 mm
Front wheel specific pressure on the floor	1.2 N/mm² - 4.6 N/mm²
Rear wheel diameter	100 mm
Vacuum system motor power	330 W
Drive system motor power	—	200 W
Drive speed (variable)	—	0 to 5.6 km/h
Gradeability	2 %
Sound pressure level at workstation (ISO 11201, ISO 4871) (LpA)	65.8 dB(A) ± 3 dB(A)
Machine sound pressure level (ISO 3744, ISO 4871) (LwA)	84 dB(A)
Vibration level at the operator's arms (ISO 5349-1)	< 2.5 m/s²
Standard batteries	GEL: (2 x 12 V) 24 V 110 Ah / 5 h
Battery compartment size (width x length x height)	350 x 350 x 300 mm
Vacuum system circuit capacity	1,055 mm H₂O

Technical data for machines with brush/pad-holder deck

Model	BA 551 1 brush/pad-holder, without drive system	BA 551D 1 brush/pad-holder, with drive system	BA 611D 2 brushes/pad-holders, with drive system
Cleaning width	530 mm	530 mm	610 mm
Squeezegee width	760 mm		810 mm
Machine maximum length	1,323 mm		1,311 mm
Machine width without squeezegee	541 mm		646 mm
Brush diameter	530 mm		305 mm
Weight without batteries and with empty tanks	88 kg	102 kg
Maximum weight with batteries and full tanks	236 kg	250 kg
Brush motor power	480 W		350 W
Brush speed	153 rpm		230 rpm
Brush/pad-holder pressure with extra-pressure function turned off	20.5 kg
Brush/pad-holder pressure with extra-pressure function turned on	27.8 kg

Technical data for machines with cylindrical brush deck

Model	BA 551CD 2 cylindrical brushes, with drive system
Cleaning width	510 mm
Squeezee width	760 mm
Machine maximum length	1,253 mm
Machine width without squeezee	575.5 mm
Cylindrical brush size (diameter x length)	110 x 485 mm
Weight without batteries and with empty tanks	112 kg
Maximum weight with batteries and full tanks	260 kg
Brush motor power	400 W
Cylindrical brush speed	570 rpm
Cylindrical brush pressure	26.5 kg

WIRING DIAGRAM FOR BA 551
Key

BAT	24 V battery
C1	Battery connector
C2	Battery charger connector
CH	Battery charger (optional)
CS	Deck connector
EB1	Function electronic board
ES1	Brush motor electromagnetic switches
ES2	Vacuum system relay
EV1	Water solenoid valve
F1	Deck fuse
F2	Vacuum system fuse
F4	Signal circuit fuse
HM	Hour counter (optional)
M1	Brush/pad-holder motor
M2	Vacuum system motor

Colour codes

BK	Black
BU	Blue
BN	Brown
GN	Green
GY	Grey
OG	Orange
PK	Pink
RD	Red
VT	Violet
WH	White
YE	Yellow

(*) Only for machines without on-board battery charger

S311314

WIRING DIAGRAM FOR BA 451D AND BA 531D Key

BAT	24 V battery
C1	Battery connector
C2	Battery charger connector
CH	Battery charger (optional)
CSC	Cylindrical brush deck secondary connector
EB1	Function electronic board
EB2	Drive system electronic board
ES1	Brush motor electromagnetic switches
ES2	Vacuum system relay
EV1	Detergent solenoid valve (optional)
F1	Deck fuse
F2	Vacuum system fuse
F3	Drive system fuse
F4	Signal circuit fuse
F5	Brush/pad-holder release fuse
F6	Pump fuse
HM	Hour counter (optional)
K1	Ignition key
M1	Brush/pad-holder motor
M2	Vacuum system motor
M3	Drive system motor
M4	Water pump (optional)
M5	Detergent pump (optional)
RV1	Speed potentiometer
RV2	Maximum speed potentiometer
SW1	Brush/drive system enabling microswitch

() Only for machine with wheel diameter of 250~mm
(^) Only for machines with cylindrical brush deck
(^*) Only for machines without on-board battery charger

Colour codes

BK	Black
BU	Blue
BN	Brown
GN	Green
GY	Grey
OG	Orange
PK	Pink
RD	Red
VT	Violet
WH	White
YE	Yellow

S3113332

USE

WARNING!

On some points of the machine there are some adhesive plates indicating:

DANGER
WARNING
- CAUTION
CONSULTATION

While reading this Manual, the operator must pay particular attention to the symbols shown on the plates.

Do not cover these plates for any reason and immediately replace them if damaged.

BATTERY CHECK/SETTING ON A NEW MACHINE

WARNING!

The electric components of the machine can be seriously damaged if the batteries are either improperly installed or connected. The batteries must be installed by qualified personnel only. Set the function electronic board and the battery charger (optional) according to the type of batteries used (WET or GEL).

Check the batteries for damage before installation.

Disconnect the battery connector and the battery charger plug.

Handle the batteries with great care.

Install the battery terminal protection caps supplied with the machine.

The machine requires two 12V batteries, connected according to the diagram (58).

The machine can be supplied in one of the following modes:

Batteries (WET or GEL) already installed and ready to be used

1. Check that the batteries are connected to the machine with the connector (12).
2. (Only for BA 551D, BA 551CD, BA 611D): Insert the ignition key (80) and turn it to "I".

(Only for BA 551): Turn on the machine by pressing the switch (71) and/or (73).

If the green warning light (81a) turns on, the batteries are ready to be used.

If the yellow or red warning light (81b or 81c) turns on, the batteries must be charged (see the procedure in Maintenance

chapter).

Batteries (WET) installed on the machine, but without electrolyte

1. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16).
2. Grasp the handle (41) and carefully lift the tank (40).
3. Remove the caps (53) of the batteries (52).

WARNING!

Pay attention when using sulphuric acid, as it is corrosive. If it comes in contact with skin or eyes, rinse

thoroughly with water and consult a physician.

Batteries have to be filled in a well-ventilated area. Wear protective gloves.

1. Fill up the battery cells with sulphuric acid for batteries (density 1.27 to 1.29kg at 25^ ) in accordance with the instructions shown in the Battery Manual. The correct quantity of sulphuric acid is shown in the Battery Manual.
2. To avoid damaging the floor, dry with a cloth both acid and water on the top of the batteries after charging.
3. Let the batteries rest and fill in with sulphuric acid in accordance with the instructions shown in the Battery Manual.
4. Charge the batteries (see the procedure in Maintenance chapter).

Without batteries

1. Buy appropriate batteries (see the Technical Data paragraph).
2. For battery choice and installation, apply to qualified battery Retailers.
3. Set the machine and the battery charger (if equipped) according to the type of batteries installed (WET or GEL), according to the procedure shown in the following paragraph.

BATTERY INSTALLATION AND BATTERY TYPE SETTING (WET OR GEL)

Set the electronic board of the machine and of the battery charger (if equipped) according to the type of batteries installed (WET or GEL) as shown below:

Machine setting (only for BA 551)

1. Press the switch (71) or (73) and pay attention to the following in the very first seconds of machine operation:

If the green warning light (81a) is flashing, the machine is set to GEL.
If the red warning light (81c) is flashing, the machine is set to WET.

1. If the setting is to be changed, perform the following procedure.
2. Turn off the machine by pressing the switch (71) and/or (73).
3. Press and hold the switches (71) and (73) at the same time.
4. Release the switches (71) and (73) at least 8 seconds after starting the machine.
5. Within 3 seconds, press the switch (73) again for a few seconds and check that the warning light for the required setting is flashing (as shown in step 1).

Machine setting (only for BA 551D, BA 551CD, BA 611D)

1. Turn the ignition key (80) to "I" and pay attention to the following in the very first seconds of machine operation:

2. If the green warning light (81a) is flashing, the machine is set to GEL.
   If the red warning light (81c) is flashing, the machine is set to WET.

3. If the setting is to be changed, perform the following procedure.

4. Turn off the machine by turning the ignition key (80) to "0".
5. Press and hold the switches (71) and (73) at the same time, then turn the ignition key (80) to "I".
6. Release the switches (71) and (73) at least 8 seconds after starting the machine.
7. Within 3 seconds, press the switch (73) again for a few seconds and check that the warning light for the required setting is flashing (as shown in step 1).

Battery charger setting (for machines with on-board battery charger)

1. Remove the battery charger data inspection window screws (A, Fig. 1).
2. Remove the window (B).
3. Turn the battery charger selector (C) to WET for lead batteries, or to GEL for gel batteries.
4. Install the window (B) and tighten the screws (A).

Battery installation

1. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16).
2. Grasp the handle (41) and carefully lift the tank (40).
3. Install the batteries.

Battery charging

1. Charge the batteries (see the procedure in Maintenance chapter).

Figure 1

S311316

BEFORE MACHINE START-UP

Deck installation/removal

The machine can be equipped with either the brush/pad-holder deck (18a and 18b) or the cylindrical brush deck (18c).

For deck installation/removal see the procedure in Maintenance chapter.

NOTE

When the deck is installed/removed, it may be necessary to change the squeegee too, because they must have the same width. For correct matching of deck and squeegee, see the Squeegee Installation paragraph.

Brush/pad-holder installation/removal

1. According to the kind of cleaning to be performed, the machine can be equipped either with brushes (A, Fig. 2) or pad-holders (B) with pads (C) together with the appropriate deck.
2. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "0". (Only for BA 551): Turn off the machine by pressing the switch (71) and/or (73).
3. If equipped, turn the speed adjuster (4) to idle by turning it counter-clockwise.
4. Place the brushes (A) or the pad-holders (B) under the appropriate deck (18a) or (18b).
5. Lower the deck on the brushes/pad-holders by pressing the pedal (11).
6. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "I".
7. Press the brush/pad-holder and vacuum system switch (71).
8. Slightly press the paddle (3) forward to engage the brushes/pad-holders, then release it. If necessary, repeat the procedure until the brushes/pad-holders are engaged.

Figure 2

S311317

WARNING!

(Only for BA 551D, BA 551CD, BA 611D): Do not press the paddle (3) completely, otherwise the machine will start moving.

A slight pressure on the paddle (3) is enough to engage the brushes/pad-holders and to turn on the relevant motors.

1. To remove the brushes/pad-holders, the deck must be lifted by pressing the pedal (11), then press the switch (75) (if equipped) and wait for the brush/pad-holder to fall on the floor.

(Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "0".

(Only for BA 551): Press the switch (71).

If the machine is not equipped with the automatic release system (switch 75), manually remove the brush/pad-holder from the hub, by turning it in the opposite direction to the normal rotation direction.

Available brushes and their relevant application guides (suggestions only)

Models	MIDLITE GRIT 180	MIDGRIT 240	PROLENE	PROLITE	UNION MIX
General cleaning:
Concrete
Terrazzo floor
Ceramic tiles/quarrystones
Marble
Vinyl tiles
Rubber tiles
Polishing:
Rubber tiles
Marble
Vinyl tiles

Cylindrical brush installation/removal (only for BA 551CD)

1. Turn the ignition key (80) to "0".
2. Lift the cylindrical brush deck by pressing the pedal (11).
3. Remove the handwheels (A, Fig. 3) and the lids (B) by pushing them downwards and pressing on the handwheels.
4. Install the cylindrical brushes (C).

The cylindrical brushes can be installed on either sides.

1. Install the lids (B) and fasten them with the handwheels (A).
2. To remove the cylindrical brushes, perform steps 1 to 5 in the reverse order.

Figure 3

S311318

Available cylindrical brushes and their relevant application guides (suggestions only)

Models	POLYPROPYLENE 0.40	HARD NYLON 0.60	SOFT NYLON 0.45
General cleaning:
Concrete
Terrazzo floor
Ceramic tiles/quarrystones
Marble
Vinyl tiles
Rubber tiles

Squeegee installation

1. Install the squeegee (25) and fasten it with the handwheels (26), then connect the vacuum hose (15) to the squeegee.
2. With the handwheel (27), adjust the squeezegee so that the rear blade - in all its length - touches the floor and the front blade is slightly detached from the floor.

Guide to match squeezees and brush/pad-holder decks

Deck model	Squeezee model
Deck with one brush (18a), brush diameter: 530 mm	Aluminium (Fig. 6), width 760 mm
Deck with two brushes (18b), brush diameter: 305 mm	Steel (Fig. 7), width 810 mm
Deck with two cylindrical brushes (18c), brush length: 485 mm	Aluminium (Fig. 6), width 760 mm

Solution or washing water tank filling

NOTE

If the machine is equipped with EcoFlex™ system (optional) (switches (83 and 77) activated) pour clean water in the tank, otherwise pour solution.

1. Open the filler neck (8).
2. (For machine without EcoFlex™ system)

Fill the tank (20) with a solution suitable for the work to be performed.

Do not fill the solution tank completely, leave a few centimetres from the edge.

Always follow the dilution instructions on the label of the chemical product used to prepare the solution.

The solution temperature must not exceed 40^ .

CAUTION!

Use only low-foam and non-flammable detergents, intended for automatic scrubber applications.

(For machine with EcoFlex™ system)

Fill the tank (20) with clean water.

Do not fill the clean water tank completely, leave a few centimetres from the edge.

The water temperature must not exceed 40^ .

Detergent tank filling

(For machine with EcoFlex™ system)

1. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16).
2. Grasp the handle (41) and carefully lift the tank (40).
3. Open the plug (46).
4. Fill the tank (45) with a detergent suitable for the work to be performed (highly concentrated detergent).

Do not fill the detergent tank completely, leave a few inches from the edge.

CAUTION!

Use only low-foam and non-flammable detergents, intended for automatic scrubber applications.

NOTE

If the detergent hose (48) is empty (in case of new system, system emptied for cleaning, etc.), in order to fill the hose quickly, it may be useful to drain EcoFlex™ system once or several times (see the procedure in Maintenance chapter).

MACHINE START AND STOP

Starting the machine

1. Prepare the machine as shown in the previous paragraph.
2. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "l".

(Only for BA 551): Turn on the machine by pressing the switch (71) and/or (73).

Check that the green warning light (81a) turns on (charged batteries).

If the yellow or red warning light (81b or 81c) turns on, turn the ignition switch back to "0" and charge the batteries (see the procedure in Maintenance chapter).

1. Drive the machine to the working place:

2. By pushing it with the hands on the handlebar (2) (only for BA 551).

3. By starting it with the hands on the handlebar (2) and pushing the paddle (3) forward to move forward, and backwards to move in reverse (only for BA 551D, BA 551CD, BA 611D).

The maximum forward speed can be adjusted with the adjuster (4).

1. Lower the squeegee (25) with the lever (10).
2. Lower the brush/pad-holder deck by pressing the pedal (11).
3. Press the brush/pad-holder and vacuum system switch (71).
4. Press the solution flow control switches (82) as necessary, depending on the type of cleaning to be performed.
5. Start cleaning, by moving the machine as shown in step 3. If necessary, adjust the maximum speed with the adjuster (4).

Stopping the machine

1. Stop the machine with the handlebar (2) (only for BA 551). Stop the machine by releasing the paddle (3) (only for BA 551D, BA 551CD, BA 611D).
2. Turn off the brushes and the vacuum system by pressing the switches (71 and 73).
3. Lift the brush/pad-holder deck by pressing the pedal (11).
4. Lift the squeegee (25) with the lever (10).
5. Make sure that the machine cannot move independently.

MACHINE OPERATION (SCRUBBING/DRYING)

1. Start the machine as shown in the previous paragraph.
2. If necessary, press the solution flow control switches (82) as necessary, depending on the type of cleaning to be performed.
3. If necessary, stop the machine and adjust the squeegee balancing handwheel (27).
4. If necessary, stop the machine and turn the adjusting handwheel (28); when turning it clockwise or counter-clockwise the machine forward speed can be adjusted.

5. (Only for BA 551): If necessary, stop the machine and turn the forward speed adjusting handwheel (29) as shown below:

6. Turn it counter-clockwise to increase the forward speed;

7. Turn it clockwise to decrease the forward speed.

NOTE

For correct scrubbing/drying of floors at the sides of the walls, Nilfisk suggests to go near the walls with the right side of the machine as shown in figure 4.

Figure 4

P100300

CAUTION!

To avoid any damage to the floor surface, turn off the brushes/pad-holders when the machine stops in one place, especially when the extra pressure function is on.

Adjustment of the detergent concentration in the solution

(For machine with EcoFlex™ system)

The system used to mix the detergent with the washing water can be activated by pressing the detergent flow control switch (A, Fig. 5): when the led indicator (B) is ON, the detergent is added to the washing water.

The display (C) shows the detergent concentration level (1 to 6) in the solution: for the related percentage values refer to the table (D).

In order to change the actual detergent concentration, proceed as follows:

1. Turn off the detergent flow control switch (A) (the led indicator (B) must be OFF).
2. Press and hold the detergent flow control switch (A) until the led indicator (B) flashes.
3. Release the switch (A). Press it again shortly to go to the next level shown by the display (C); repeat the operation until the desired setting is reached.
4. Wait until the led indicator (B) stops flashing: the new level is now set.

NOTE

Detergent percentage setting is stored into memory, even if the machine is turned off.

EcoFlex™ switch

Press the EcoFlex™ switch (E, Fig. 5) whenever you temporarily need a greater washing power.

When you press the switch (E) (the led indicator (F) is flashing) the solution flow increases (for machine with EcoFlex™ system) and the detergent concentration in the solution increases (moreover, if the detergent mixing function is not activated, it is automatically activated).

The original settings can be restored by pressing the switch (E) once again (the led indicator (F) is ON).

NOTE

If the switch (E) is not pressed once again, the original settings are restored automatically after 60 seconds.

Figure 5

S311318

Working with brush/pad-holder extra pressure function turned on

If the floor proves to be particularly difficult to clean, it is possible to turn on the brush/pad-holder extra pressure function by pressing the pedal (11) to position (11c).

CAUTION!

When the cylindrical brush deck (18c) is installed, the extra pressure function is not enabled.

CAUTION!

In case of brush/pad-holder motor overload, due to foreign bodies which prevent them from turning, or to excessively aggressive floors/brushes, the safety system stops the motor after about one minute of continuous overload.

The overload is shown by the three warning lights (81a, 81b, 81c) flashing simultaneously. If the overload takes place when the extra pressure function is on (11c), press the pedal to position (11b). If the overload persists, the brush/pad-holder stops.

To start scrubbing again after a brush/pad-holder stop due to overload, stop the machine by turning the ignition key (80) to "0". Turn on the machine by turning the ignition key (80) to "1".

Battery discharge during operation

Until the green warning light (81a) stays on, the batteries allow the machine to work normally.

When the green warning light (81a) turns off, and the yellow warning light (81b) turns on, it is advisable to charge the batteries, because the residual autonomy will last for a few minutes (depending on battery characteristics and work to be performed).

When the red warning light (81c) turns on, the autonomy is over. After a few seconds, the brush/pad-holder is automatically tuned off, while the vacuum system and (only for BA 551D, BA 551CD, BA 611D) the drive system stay on, to finish drying the floor and drive the machine to the appointed recharging area.

CAUTION!

Do not use the machine with discharged batteries, to avoid damaging the batteries and reducing the battery life.

TANK EMPTYING

An automatic float shut-off system (36) turns off the vacuum system when the recovery tank (21) is full.

The vacuum system deactivation is signalled by a sudden increase in the vacuum system motor noise frequency, and the floor is not dried.

CAUTION!

If the vacuum system turns off accidentally (for example, when the float is activated because of a sudden machine movement), to resume the operation: turn off the vacuum system by pressing the switch (73), then open the cover (22) and check that the float inside the grid (36) has gone down to the water level. Then close the cover (22) and turn on the vacuum system by pressing the switch (73).

When the recovery tank (21) is full, empty it according to the following procedure.

Recovery tank emptying

1. Stop the machine.
2. Lift the brush/pad-holder deck by pressing the pedal (11).
3. Lift the squeegee (25) with the lever (10).
4. Drive the machine to the appointed disposal area.
5. Empty the recovery tank with the hose (16). Then, rinse the tank with clean water.

Solution/clean water tank emptying

1. Perform steps 1 to 4.
2. Empty the solution tank with the hose (17). Then, rinse the tank with clean water.

Cylindrical brush debris container emptying (only for cylindrical brush deck)

1. Stop the machine.
2. Lower the cylindrical brush deck and remove the debris container (D, Fig. 3) by pulling it on one side with the handle (E).
3. Empty and wash the debris container (D), and then install it by engaging it on the fasteners.

AFTER USING THE MACHINE

After working, before leaving the machine:

1. Remove the brushes/pad-holders according to the procedure shown in the relevant paragraph.
2. Empty the tanks (20 and 21) and the debris container (D, Fig. 3) as shown in the relevant paragraph.
3. Perform the daily maintenance procedures (see the Maintenance chapter).
4. Store the machine in a clean and dry place, with the brushes/pad-holders and the squeegee lifted or removed.

MACHINE LONG INACTIVITY

If the machine is not going to be used for more than 30 days, proceed as follows:

1. Perform the procedures shown in After Using the Machine paragraph.
2. Disconnect the battery connector (12).

FIRST PERIOD OF USE

After the first 8 hours, check the machine fastening and connecting parts for proper tightening and check the visible parts for integrity and leakage.

MAINTENANCE

The lifespan of the machine and its maximum operating safety are ensured by correct and regular maintenance.

The following table provides the scheduled maintenance. The intervals shown may vary according to particular working conditions, which are to be defined by the person in charge of the maintenance.

WARNING!

The procedures must be performed with the machine off and the battery disconnected.

Moreover, read carefully the instructions in the Safety chapter before performing any maintenance procedure.

All scheduled or extraordinary maintenance procedures must be performed by qualified personnel, or by an authorised Service Center.

This Manual describes only the easiest and most common maintenance procedures.

For other maintenance procedures shown in the Scheduled Maintenance Table, refer to the Service Manual that can be consulted at any Service Center.

SCHEDULED MAINTENANCE TABLE

Procedure	Daily, after using the machine	Weekly	Every six months	Yearly
Battery charging
Squeezegee cleaning
Brush/pad cleaning
Tank and vacuum grid with float cleaning, and cover gasket check
EcoFlex™ system cleaning and draining (optional)
Squeezegee blade check and replacement
Solution/clean water filter cleaning
Vacuum system motor filter cleaning
WET battery fluid level check
Screw and nut tightening check			(1)
Brush/pad-holder motor carbon brush check or replacement				(2)
Vacuum system motor carbon brush check or replacement				(2)
Drive system motor carbon brush check or replacement (only for BA 551D, BA 551CD, BA 611D)				(2)

(1) And after the first 8 working hours.
(2) This maintenance procedure must be performed by an authorised Nilfisk Service Center.

BATTERY CHARGING

NOTE

Charge the batteries when the yellow or red warning light (81b or 81c) turns on, or at the end of every working cycle.

CAUTION!

Keeping the batteries charged make their life last longer.

CAUTION!

When the batteries are discharged, charge them as soon as possible, as that condition makes their life shorter. Check for battery charge at least once a week.

CAUTION!

If the machine is not equipped with on-board battery charger, choose an external battery charger suitable for the type of batteries installed.

WARNING!

WET battery charging produces highly explosive hydrogen gas. Charge the batteries in well-ventilated areas and away from naked flames. Do not smoke while charging the batteries. Keep the tank assembly open while charging the batteries.

WARNING!

Pay careful attention when charging the batteries as there may be battery fluid leakages. The battery fluid is corrosive. If it comes in contact with skin or eyes, rinse thoroughly with water and consult a physician.

Preliminary procedures

1. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16).
2. Drive the machine to the appointed recharging area.
3. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "0". (Only for BA 551): Turn off the machine by pressing the switch (71) and/or (73).
4. Grasp the handle (41) and carefully lift the tank (40).

5. For WET batteries only:

6. Check the level of electrolyte inside the batteries (52); if necessary, top up through the caps (53).

7. Then leave all the caps (53) open for battery charging.
   If necessary, clean the upper surface of the batteries.

8. Charge the batteries according to one of the following procedures, depending on the presence of the battery charger (90).

Charging the batteries with an external battery charger

1. Check that the external battery charger is suitable by referring to the relevant Manual. The battery charger voltage rating must be 24V .
2. Disconnect the battery connector (12) and connect it to the external battery charger.
3. Connect the battery charger to the electrical mains.
4. After charging, disconnect the battery charger from the electrical mains and from the battery connector (12).
5. (For WET batteries only) Check the level of electrolyte inside the batteries and close all the caps (53).
6. Connect the battery connector (12) to the machine.
7. Grasp the handle (41) and carefully lower the tank (40).

Battery charging with (optional) battery charger installed on the machine

1. Connect the battery charger cable (6) to the electrical mains (the electrical mains voltage and frequency must be compatible with the battery charger values shown on the machine serial number plate (34)).

When the battery charger is connected to the electrical mains, all machine functions are automatically cut off. If the red warning light (94) on the battery charger control panel stays on, the battery charger is charging the batteries.

1. When the green warning light (92) turns on, the battery charging is completed.
2. When the battery charging is completed, disconnect the battery charger cable (6) from the electrical mains and wind it round its housing (7).
3. Grasp the handle (41) and carefully lower the tank (40).

NOTE

For further information about the operation of the battery charger (90), see the relevant Manual.

MACHINE WORKING HOUR CHECK

(Only if the machine is equipped with hour counter)

1. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "I".
2. Press the switch (73) and read on the hour counter (79) the total number of working hours (scrubbing/drying) performed by the machine.
3. Press the switch (73) again.
4. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "0".

SQUEEGEE CLEANING

NOTE

The squeegee must be clean and its blades must be in good conditions in order to get a good drying.

CAUTION!

It is advisable to wear protective gloves when cleaning the squeegee because there may be sharp debris.

1. Drive the machine on a level floor.
2. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "0". (Only for BA 551): Turn off the machine by pressing the switch (71) and/or (73).
3. Lower the squeegee (25) with the lever (10).
4. Loosen the handwheels (26) and remove the squeegee (25).
5. Disconnect the vacuum hose (15) from the squeegee.
6. Clean the steel squeezegee (Fig. 6) or the aluminium squeezegee (Fig. 7). Clean the compartments (A, Fig. 6 or 7) and the hole (B) especially. Check the front blade (C) and the rear blade (D) for integrity, cuts and tears; if necessary replace them (see the procedure in the following paragraph).
7. Install the squeegee in the reverse order of removal.

SQUEEGEE BLADE CHECK AND REPLACEMENT

1. Clean the steel squeezegee (Fig. 6) or the aluminium squeezegee (Fig. 7), according to the procedure shown in the previous paragraph.

2. Check that the edges (E, Fig. 6 or 7) of the front blade (C) and the edges (F) of the rear blade (D) lay down on the same level, along their length; otherwise adjust their height according to the following procedure:

3. Release the tie rod (G, Fig. 6 or 7) and loosen the wing nuts (H, Fig. 6), or disengage the fasteners (M, Fig. 7) and adjust the rear blade (D, Fig. 6 or 7), then tighten the wing nuts, or engage the fasteners, and then engage the tie rod.

4. Loosen the handwheels (I) and adjust the front blade (C, Fig. 6 or 7); then tighten the handwheels.

5. Check the front blade (C, Fig. 6 or 7) and rear blade (D) for integrity, cuts and tears; if necessary replace them according to the following procedure. Check the front corner (J) of the rear blade for wear; if necessary, overturn the blade to replace the worn corner with an integral one. If the other corners are worn too, replace the blade according to the following procedure:

6. Release the tie rod (G), remove the wing nuts (H) or disengage the fasteners (M), remove the retaining strip (K), then replace/overturn the rear blade (D).
   Install the blade in the reverse order of removal.

7. Unscrew the handwheels (I) and remove the retaining strip (L), then replace the front blade (C).

Install the blade in the reverse order of removal.

After the blade replacement (or overturning), adjust the height as shown in the previous step.

1. Connect the vacuum hose (15) to the squeegee.
2. Install the squeegee (25) and screw down the handwheels (26).
3. If necessary, adjust the squeegee balance adjusting handwheel (27).

Figure 6

S311318

Figure 7

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BRUSH/PAD CLEANING

CAUTION!

It is advisable to wear protective gloves when cleaning the brushes/pads/cylindrical brushes because there can be sharp debris.

1. Remove the brushes/pads from the machine, as shown in the Use chapter.
2. Clean and wash the brushes/pads with water and detergent.
3. Check the brushes/pads for integrity and wear; if necessary replace them.
4. On the machines equipped with the cylindrical brush deck, remove the debris container (D, Fig. 3) by pulling it on one side with the handle (E).

Empty and wash the debris container (D), and then install it by engaging it on the fasteners.

TANK AND VACUUM GRID WITH FLOAT CLEANING, AND COVER GASKET CHECK

1. Drive the machine to the appointed disposal area.
2. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "0". (Only for BA 551): Turn off the machine by pressing the switch (71) and/or (73).
3. Open the cover (A, Fig. 8) to washing position (L).
4. Wash with clean water the cover (A), the tanks (B and C) and the vacuum grid with automatic shut-off float (D). Drain the water from the tanks with the hoses (16 and 17).
5. If necessary, release the fasteners (E) and open the grid (D), recover the float (F), clean all the components and then reinstall them.
6. Check the tank cover gasket (G) for integrity.

NOTE

The gasket (G) creates vacuum in the tank that is necessary for vacuuming the recovery water.

If necessary replace the gasket (G) by removing it from its housing (H). When assembling the new gasket, install the joint (I) in the rear central area, as shown in the figure.

1. Check that the seating surface (J) of the gasket (G) is integral and adequate for the gasket itself.
2. Check the compensation hole (K) for clogging, and clean it if necessary.

NOTE

The hole (K) , allowing to compensate the air in the cover air gap, contributes to create vacuum in the tank.

1. Close the cover (A).

Figure 8

S311318

VACUUM SYSTEM MOTOR FILTER CLEANING

1. Drive the machine on a level floor.
2. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "0". (Only for BA 551): Turn off the machine by pressing the switch (71) and/or (73).
3. Open the recovery tank.
4. If necessary, drain the water from the tank in order to make the filter visible.
5. Check that the pre-filter is clean. If necessary clean it with water and compressed air, then install it.
6. Perform steps 1, 2 and 3 in the reverse order.

SOLUTION FILTER CLEANING

(For machine without EcoFlex™ system)

1. Drive the machine on a level floor.
2. (Only for BA 551D, BA 551CD, BA 611D): Turn the ignition key (80) to "0". (Only for BA 551): Turn off the machine by pressing the switch (71) and/or (73).
3. Close the solution tap (A, Fig. 9) under the machine, behind the right rear wheel. The tap (A) is closed when it is in the position (B) and it is open when it is in the position (C).
4. Remove the transparent cover (D), then remove the filter strainer (E). Clean and install them on the support (F).

NOTE

The filter strainer (E) must be correctly positioned on the housing (G) of the support (F).

1. Open the tap (A).

Figure 9

S311318

CLEAN WATER FILTER CLEANING

(For machine with EcoFlex™ system)

1. Drive the machine on a level floor.
2. Turn the ignition key (80) to "0".
3. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16).
4. Grasp the handle (41) and carefully lift the tank (40).
5. Slightly lift the hoses (A, Fig. 10), then, operating on the clean water filter assembly (F) unscrew the transparent cover (B) and remove the filter strainer (C). Clean and install them on the support (D).

NOTE

The filter strainer (C) must be correctly positioned on the housing (E) of the support (D).

1. Install the hoses (A) and the filter assembly (F).

FUSE CHECK/REPLACEMENT

1. Disconnect the battery connector (12).
2. Move aside the recovery water drain hose (16).
3. Remove the battery charger cable (I, Fig. 11), if equipped, from the cable holder (J).
4. Remove the screws (A) and carefully move aside the panel (B) by disengaging the grommet (K) from its housing on the panel (B).
5. Check/replace the following fuses:

C) Brush deck fuse F1: (40 A)
D) Vacuum system fuse F2: (30 A)
E) Drive system fuse F3: (30 A) ()
F) Signal circuits fuse F4: (3 A)
G) Brush/pad-holder release fuse F5: (20 A) ()
H) Pump fuse F6: (3 A) ()
() Only for BA 551D, BA 551CD, BA 611D

1. Perform steps 1 to 4 in the reverse order.

Figure 10

S311318

Figure 11

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BRUSH/PAD-HOLDER/CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY

The machine can be equipped with either the brush/pad-holder deck (18a and 18b) or the cylindrical brush deck (18c).

NOTE

When the deck is installed/removed, it may be necessary to change the squeegee too, because they must have the same width. For correct matching of deck and squeegee, see the Squeegee Installation paragraph.

Disassembly

1. Drive the machine on a level floor.
2. Remove the brushes/pad-holders according to the procedure shown in the relevant paragraph. Do not remove the cylindrical brushes.
3. Lower the brush/pad-holder deck by pressing the pedal (11).
4. If equipped, remove the cotter pins (B, Fig. 12) and the gas spring (A).
5. Disconnect the brush/pad-holder motor electrical connection (D).
6. Disconnect the solution hose union (E).
7. Remove the screws (C), then remove the brush/pad-holder deck (F).

Assembly

1. Assemble the components in the reverse order of disassembly, and note the following:

2. When the machine is equipped with the cylindrical brush deck (18c), the gas spring (A) must not be installed.

Figure 12

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DETERGENT TANK CLEANING

(For machine with EcoFlex™ system)

Clean the detergent tank (45) according to the following procedure:

1. Drive the machine to the appointed disposal area.
2. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16). Close the cover (22).
3. Grasp the handle (41) and carefully lift the tank (40).
4. Unscrew the plug and disconnect the hose (48) from the tank (45).
5. Remove the tank by releasing it from the fasteners.
6. Wash the tank in the appointed disposal area.
7. Install the tank (45) and connect it to the hose (48).
8. When the detergent tank has been drained, the EcoFlex™ system must be drained too (see the procedure in the following paragraph).

(For machine with EcoFlex™ system)

1. Clean the detergent tank according to the procedure shown in the previous paragraph. To remove the detergent remained in the hoses and in the pump, perform the following procedure.
2. Grasp the handle (41) and carefully lower the tank (40).
3. Turn on the machine by turning the ignition key (80) to "I".
4. Press the switch (77). Check that the switch warning light (78) turns on.
5. Press the switches (77) and (82a) at the same time, until the switch warning light (78) starts flashing (after about 5 seconds).
6. Release the switches and wait for the warning light (78) to stop flashing and for the vacuum system to turn on.
7. Collect the detergent remained on the floor.
8. Turn the ignition key (80) to "0".
9. Grasp the handle (41) and carefully lift the tank (40), then check that the hose (48) is empty, otherwise perform steps 3 to 9 again.

NOTE

The draining cycle lasts about 30 seconds, then the vacuum function automatically turns on, which allows to remove the detergent remained.

The draining cycle can also be performed with the detergent tank (45) full of water, thus cleaning the system thoroughly. It is advisable to perform this type of draining to clean the EcoFlex™ system from dirt and deposits if the machine has not been used/cleaned for a long time.

The draining cycle can be performed also to quickly fill the detergent supply hose when the tank (45) is full but the system is still empty.

If necessary, the draining cycle can be repeatedly performed.

TROUBLESHOOTING

Trouble	Possible Cause	Remedy
The motors do not work; no warning light turns on.	The battery connector is disconnected.	Connect.
	The batteries are completely discharged.	Charge the batteries.
The machine does not move(Only for BA 551D, BA 551CD, BA 611D)	The machine has been turned on by using the ignition key and by keeping the paddle pressed.	Turn the ignition key to "0", then try to start the machine without pressing the paddle.
The warning lights (81) flash simultaneously.	The deck motor is overloaded.	Use less aggressive brushes suitable for the floor to be cleaned or avoid working with extra pressure function turned on.
The brushes do not work, the red warning light is on.	Discharged batteries	Charge the batteries.
The dirty water vacuuming is insufficient.	The recovery tank is full.	Empty the tank.
	The hose is disconnected from the squeegee.	Connect.
	The vacuum grid is clogged or the float is closing.	Clean the grid or check the float.
	The squeegee is dirty, or the squeegee blades are worn or damaged.	Clean and check the squeegee.
	The tank cover is not properly closed, or the gasket is damaged.	Close the cover properly or replace the gasket.
The solution flow is insufficient.	The solution/clean water filter is dirty.	Clean the filter.
	The recovery tank is dirty (the drain hole is clogged).	Clean.
	Dirty/encrusted EcoFlexTM system tank (optional).	Drain.
The squeegee leaves marks on the floor.	There is debris under the squeegee blades.	Remove the debris.
	The squeegee blades are worn, chipped or torn.	Replace the blades.
	The squeegee is not balanced with the handwheel.	Balance.

NOTE

If the machine has a battery charger installed, the machine cannot operate if the charger is not on board. In case of battery charger malfunction, contact an authorised Service Center.

For further information refer to the Service Manual, available at any Nilfisk Service Center.

SCRAPPING

Have the machine scrapped by a qualified scrapper.

Before scrapping the machine, remove and separate the following materials, which must be disposed of properly according to the Law in force:

• Batteries
  Brushes/pads
• Plastic hoses and components
• Electrical and electronic components (*)

(*) Refer to the nearest Nilfisk Center especially when scrapping electrical and electronic components.

INHOUDSOPGAVE

INLEIDING 2

DOEL EN INHOUD VAN DEZE HANDLEIDING 2

BETREFENDE PERSONEN 2

OPBERGEN VAN DE HANDLEIDING 2

CONFORMITEITSVERKLARING 2

IDENTIFICATIEGEGEVENS 2

ANDERE GEBRUKERSHANDLEIDENGIN 3

VERVANGINGSONDERDELEN EN ONDERHOUD 3

MODIFICATIES EN VERBETERINGEN 3

BEDRIJFSCAPACITEIT 3

ALGEMENE OPMERKINGEN 3

VERPAKKING VERWIJDEREN/AFLEVERING 3

VEILIGHEID 4

GEBRUIKTE SYMBOLEN 4

ALGEMENE INSTRUCTIONS 4

BESCHRIJVING VAN DE MACHINE 6

OPBOUW VAN DE MACHINE 6

BEDIENINGSPANEEL 8

KLEPJE VOOR HET AFLEZEN VAN DE GEGEVENS VOOR DE ACCULADER (optioneel) 8

ACCESSIONS / OPTIES 9

Led brandt - EcoFlex™ in werking

Led knippert - EcoFlex™ override