Miele G 7891 Operating instructions

Operating instructions

Washer-disinfector G 7891

To avoid the risk of accidents or damage to the machine it is essential to read these instructions before it is installed, commissioned and used for the first time.

en - GB, AU

M.-Nr. 07 779 871

Contents

Warning and safety instructions .....................................5

Symbols on the appliance .........................................9

Intended use.....................................................10

Guide to the machine .............................................11

Caring for the environment.........................................13

Disposal of your old machine ........................................13

Opening and closing the door ......................................14

Electric door lock ..................................................14

To open the door a ...............................................14

To close the door ..................................................14

To open the door with the emergency release ...........................14

Water softener ...................................................15

Programming the water softener ......................................15

Filling the salt reservoir .............................................17

Add salt indicator..................................................18

Areas of application...............................................19

Protein test .......................................................19

Loading the machine ...............................................20

Water connection spring adapter .....................................21

Height adjustable top basket.........................................21

Dental...........................................................23

Chemical processes and technology.................................25

Dispensing chemical agents........................................29

Adding rinsing agent ...............................................29

Add rinsing agent indicator ..........................................30

Setting the dosage.................................................30

Adding neutralising agent ...........................................31

Add neutralising agent indicator .....................................32

Adding cleaning agent .............................................33

Adding powder cleaning agent .......................................33

Operation .......................................................35

Switching on .....................................................35

Starting a programme ..............................................35

Selecting the Drying 0 additional function ...........................35

Programme sequence indicators .....................................36

At the end of a programme ..........................................37

Additional drying................................................37

Contents

Switching off .....................................................37

Cancelling a programme ............................................38

Programme cancellation due to a fault...............................38

Cancelling the programme manually ................................38

Programmable functions...........................................39

The following applies to all programmable functions: ......................39

To activate programming mode ....................................39

To save values and exit from programming mode ......................39

To exit from programming mode without saving .......................39

Resetting the operating hours counter for the filter in the drying unit ..........40

Dispensing liquid cleaning agent via DOS 1.............................41

Setting the dosage concentration...................................41

Venting the dispensing system.....................................41

Dispensing neutralising agent via DOS 3 ...............................42

Setting the dosage concentration...................................42

Venting the dispensing system.....................................42

Buzzer ..........................................................43

Changing programme parameters ....................................44

Changing the wash parameters ....................................44

Changing the drying parameters ...................................44

Changing the temperature ........................................45

Changing the temperature holding time..............................45

Resetting to factory default settings ...................................46

Setting the time and date............................................47

Process documentation ...........................................48

Maintenance .....................................................49

Periodic checks ...................................................49

Process validation .................................................50

Routine checks ...................................................50

Cleaning the filters in the wash cabinet.................................51

Cleaning the coarse filter .........................................51

Cleaning the flat and micro-fine filters ...............................52

Cleaning the spray arms ............................................53

Cleaning the control panel...........................................54

Cleaning the front of the machine .....................................54

Cleaning the wash cabinet ..........................................54

Cleaning the door seals.............................................54

Dispensing systems................................................54

Contents

Baskets and inserts ................................................55

Drying unit (TA) - Maintenance .......................................56

SF2 in the display: Change the filter .................................56

Problem solving guide ............................................57

Other problems ..................................................65

Thermal cut-out ...................................................65

Cleaning the drain pump and non-return valve...........................66

Cleaning the filters in the water inlet ...................................67

After sales service ................................................68

Installation ......................................................69

Building the machine under a continuous worktop ........................69

Electrical connection..............................................71

Plumbing........................................................72

Connection to the water inlet .........................................72

AD water connection ö 0.6 - 10 bar (60 - 1000 kPa) over pressure ........73

Drainage ........................................................74

Technical data ...................................................75

Programme overview..............................................76

Warning and safety instructions

This washer-disinfector complies with all relevant local and national safety requirements. Please note that incorrect use can lead to personal injury and damage to property. To avoid the risk of accidents and damage to the washer-disinfector, please read these instructions carefully before starting to use it. Keep these instructions in a safe place for reference, and pass them on to any future user.

Correct application

This washer-disinfector is designed

for use with the applications described in these Operating Instructions only. Alterations or conversions to the machine or using it for purposes other than those for which it was designed are not permitted and could be dangerous. This machine must only be used for cleaning and disinfecting instruments or medical devices if the manufacturer has stated that they are suitable for machine processing. The manufacturer's cleaning and maintenance instructions for instruments etc. must also be observed. Miele cannot be held liable for damage caused by improper or incorrect use of the machine.

This machine may only be used in

non-stationary locations if a risk assessment of the installation has been carried out by a suitably qualified engineer.

Please pay attention to the following notes to avoid injury and damage.

This washer-disinfector should be

commissioned and then maintained by a Miele authorised and trained service technician only. To ensure compliance with the Medical Devices Directive, a Miele service contract is recommended. Unauthorised repairs could be dangerous and jeopordise the personal safety of the operator, for which the manufacturer cannot be held liable.

Do not install the washer-disinfector

in an area where there is any danger of explosion or of freezing conditions.

The electrical safety of this machine

can only be guaranteed if connected to a correctly installed earthing system on site. It is most important that this basic safety requirement is present and regularly tested, and where there is any doubt the on-site wiring system should be inspected by a qualified electrician. The manufacturer cannot be held liable for damage or injury caused by the lack of or inadequacy of an effective earthing system (e.g. electric shock).

This washer-disinfector is intended

for indoor use only.

A damaged or leaking machine

could be dangerous and compromise your safety. Disconnect the machine from the mains immediately and call the Miele Service Department.

Warning and safety instructions

Personnel operating the

washer-disinfector should be trained regularly. Untrained personnel and children must not be allowed access to the machine or its controls.

Take care when handling chemical

agents such as cleaning agent, neutralising agent, rinsing agent etc. These may contain irritant or corrosive ingredients. Follow all instructions and safety procedures carefully. Wear protective gloves and goggles. With all chemical agents, the manufacturer's safety instructions and safety data sheets must be observed.

This washer-disinfector is designed

for operation with water and recommended chemical agents only. Organic solvents and flammable liquid agents must not be used in this machine. These could cause an explosion, damage rubber and plastic components in the machine, and cause liquids to leak out of the machine.

Avoid inhalation of powder cleaners.

These cleaning agents can cause burning in the mouth and throat if swallowed and can inhibit breathing.

The water in the cabinet must not be

used as drinking water.

Do not sit or lean on an open door.

The machine could tip up and be damaged or cause an injury.

Be careful when sorting items with

sharp pointed ends and positioning them in the machine that you do not hurt yourself or create a danger for others. Sharp items should be placed in baskets with the pointed ends facing downwards.

Please be aware that the

washer-disinfector may be operating at high temperatures. If the door is opened with the emergency release cord there is a danger of burning, scalding or chemical burning.

Where there is a risk of toxic or

chemical substances occuring in the suds solution (e.g. aldehyde in the disinfecting agent), it is essential to regularly check door seals and make sure that the steam condenser is functioning correctly. Opening the machine door during a programme interruption carries particular risks in such circumstances.

Should personnel accidentally come

into contact with toxic vapours or chemical agents, follow the emergency instructions given in the manufacturer's safety data sheets.

Mobile units, baskets, inserts and

loads must be allowed to cool down before they are unloaded. Any water remaining in containers could still be very hot. Empty them into the wash cabinet before taking them out.

Do not touch the heating elements if

you open the door during or directly after the end of a programme: you could burn yourself. They remain hot for some time after the end of the programme.

Never clean the machine or near

vicinity with a hose or a pressure washer.

Warning and safety instructions

The machine must be disconnected

from the mains electricity supply before any maintenance or repair work is carried out. Do not reconnect it until the maintenance or repair work has been successfully completed.

The following points should be observed to assist in maintaining quality standards when processing medical devices, in order to protect patients, and to avoid damage to the loads being cleaned.

If the washer-disinfector is being

used for disinfection in accordance with official regulations on the control of epidemics, the steam condenser and its connections to and from the wash cabinet must be cleaned and disinfected whenever any repairs are carried out or parts replaced.

If it is necessary to interrupt a

programme in exceptional circumstances, this may only be done by authorised personnel.

The standard of cleaning and

disinfection in the disinfection programmes must be routinely confirmed by the user. The process must be thermo-electrically validated on a regular basis, and checked against documented control results.

For thermal disinfection, use

temperatures and temperature holding times to achieve the required infection prophylaxis in accordance with current health and safety regulations.

Use of chemical agents could under

certain circumstances adversely affect the components of the washer-disinfector. Follow the recommendations of the chemical agent manufacturer. In the event of any damage or material deterioration, please contact Miele.

Pre-treatments with cleaning or

disinfecting agents can create foam, as can certain types of soiling and chemical agents. Foam can have an adverse effect on the disinfection and cleaning result.

Foam must not be able to escape

from the wash cabinet. It would hinder the correct functioning of the machine.

Check the process used regularly to

monitor foaming levels.

To avoid the risk of damage to the

washer-disinfector and any accessories used with it caused by chemical agents, soiling and any reaction between the two please read the notes in "Chemical Processes and Technology".

Where a chemical agent is

recommended on technical application grounds (e.g. a cleaning agent), this does not imply that the manufacturer of the machine accepts liability for the effect of the chemical on the items being cleaned. Please be aware that changes in formulation, storage conditions etc. which may not be publicised by the chemical manufacturer, can have a negative effect on the cleaning result.

Warning and safety instructions

When using chemical agents such

cleaning agent it is essential that the manufacturer's instructions are followed. Only use chemical agents for the purpose they are designed for as specified by the manufacturer, to the exclusion of other chemicals, to avoid such dangers as chemical reactions and material damage.

In critical applications where very

stringent requirements have to be met, it is strongly recommended that all the relevant factors for the process, such as cleaning agent, water quality etc. are discussed with Miele.

Mobile units, baskets and inserts

should only be used for the purpose they are designed for. Hollow instruments must be thoroughly cleaned, internally and externally.

Empty any containers or utensils

before arranging them in the machine.

Do not allow any remains of acids or

solvents, and in particular hydrochloric acid or chloride solutions, to get into the wash cabinet. Similarly avoid any materials with a corrosive effect. The presence in compounds of any solvents should be minimal (especially those in hazard class A1).

After carrying out any work on the

mains water system, the water supply system to the washer-disinfector must be vented. Otherwise, the components in the machine may become damaged.

Please follow the advice on

installation in these instructions and the separate Installation Instructions.

Ensure that solutions or steam

containing hydrochloric acid do not come into contact with the steel outer casing of the machine, to avoid any corrosion damage.

Warning and safety instructions

Using accessories

Only use genuine Miele original

accessories with this machine. Consult Miele on the type and application of such equipment.

Only use Miele mobile units, baskets

and inserts in this machine. Using accessories, mobile units and inserts made by other manufacturers, or making modifications to Miele accessories, can result in unsatisfactory cleaning and disinfecting results, for which Miele cannot be held liable. Any resultant damage would also invalidate the machine guarantee.

Only use chemical agents which

have been approved by their manufacturer for use in the application you are using. The chemical agent manufacturer is responsible for any negative influences on the material the load is made from and for any damage they may cause to the machine.

Disposing of your old machine

Please note that the machine may

have contamination from blood or other bodily fluids in it and must be decontaminated before disposal. For environmental and safety reasons, ensure the machine is completely drained of any residual water, chemical residues and cleaning agent. Observe safety regulations and wear safety goggles and gloves. Make the door lock inoperable, so that children cannot accidentally shut themselves in. Then make appropriate arrangements for the safe disposal of the appliance.

The manufacturer cannot be held liable for damage caused by non-compliance with these Warning and Safety instructions.

Symbols on the appliance

Warning: Observe the operating instructions.

Warning: Danger of electric shock.

Intended use

This washer-disinfector can be used to clean, rinse, thermally disinfect and dry a wide range of reusable medical devices used in dental surgeries. Follow the manufacturer's instructions (according to EN ISO 17664) on how to process their items by machine.

Medical devices that can be processed in this machine include dental instruments, suction apparatus, transfer instruments, etc.

Processing instruments by machine achieves reproducible results and should be used in preference to processing them by hand. Where disinfection is required for the protection of personnel and patients, carry out thermal disinfection, e.g. using the DESIN vario TD programme. The parameters for thermal disinfection according to EN ISO 15883-1 (A

3000)

are 90 °C (+ 5 °C, - 0 °C) with a holding time of 5 minutes. The effective area A

3000 is suitable for deactivating the

HBV virus.

National health and safety regulations regarding disinfection must also be observed.

The cleaning programme as well as any chemical agents must be chosen according to the type of soiling and load being processed.

The cleaning result must ensure that the instruments can be disinfected correctly, that no residues are left behind, that subsequent sterilisation can be carried out and that the instruments can be used again safely. Medical devices are best reprocessed using the DESIN vario TD programme.

The use of a suitable carrier (basket, module, insert etc.) is important to ensure the adequate cleaning of the load. Examples are given in the section "Areas of application".

The washer-disinfector is programmed to carry out the final rinse with mains water or with processed water (optional) of a quality to suit the application (e.g. aqua destillata, purified water, de-ionised water, demineralised water).

The machine complies with EN ISO 15883 for validation purposes.

Guide to the machine

a On/Off switch I-0

b Door release a

c Display

d ß button to switch between the

displays for:

- actual temperature

- elapsed time

- active block

e Drying button 0 with indicator light

f Start button 6 with indicator light

g Programme sequence indicators:

k Reactivation I Pre-wash l Main wash H Rinse/Final rinse

c Drying r Programme finished

h Check/Fault indicators:

p / 6 Inlet//drain k Add salt w Add neutralising agent H Add rinsing agent

8 DOS Optical interface for

service technician; Add liquid cleaning agent indicator when connected toaK60DOSmodule.

i Programme selector

f Stop A Freely programmable

programme

E Universal D Pre-rinse 6 Drain

varioTD SPECIAL 93°C-10'

Guide to the machine

a Connection for DOS module K 60 at

the rear of the machine

b Service panel

c Filter combination

d Salt reservoir

e Dispenser for powder cleaning agent

f Rinsing agent reservoir (with dosage

selector)

g Rinsing agent level indicator

At the rear of the machine:

–

Interface connector RS 232

–

Suction tube for external neutralising agent container

Caring for the environment

Disposal of the packing material

The transport and protective packing has been selected from materials which are environmentally friendly for disposal and should be recycled.

Ensure that any plastic wrappings, bags etc. are disposed of safely and kept out of the reach of babies and young children. Danger of suffocation.

Disposal of your old machine

Electrical and electronic machines often contain materials which, if handled or disposed of incorrectly, could be potentially hazardous to human health and to the environment. They are, however, essential for the correct functioning of your machine. Please do not therefore dispose of it with your general waste.

Please dispose of it at your local community waste collection / recycling centre or contact your dealer for advice. Ensure that it presents no danger to children while being stored for disposal.

Opening and closing the door

Electric door lock

This machine is equipped with an electric door lock.

The door can only be opened when:

the electricity supply to the machine

is switched on and

the On/Off switch I-0 is pressed in.

To open the door a

Press the door release switch in as

far as it will go, and at the same time grip the handle and open the door.

Do not touch the heating

elements if you open the door during or directly after the end of a programme; you could burn yourself. They remain hot for some time after the end of the programme.

The door cannot be opened after a programme has been started, and it remains locked until the end of the programme. It is still possible to open the door during the PRE-RINSE D and DRAIN 6 programmes. The machine can be programmed (by a Miele approved service technician) to open during "Drying".

To open the door with the emergency release

The emergency release should only be used when the door cannot be opened normally, e.g. in the event of a power failure. Important note for SPECIAL programmes - read the notes in the Warning and Safety instructions.

There is a danger of burning, scalding and chemical burning if the door is opened using the emergency door release cord.

^ Turn the programme selector to f.

^ Switch the machine off with the

On/Off switch I-0.

To close the door

Lift the door upwards and push until it clicks shut. Do not press the door release button whilst shutting the door.

The emergency release cord is located at the bottom of the machine behind the service panel. Pull it downwards to open the door.

Water softener

In order to achieve good cleaning results, the washer-disinfector needs to operate with soft water. Hard water results in the build-up of calcium deposits on instruments etc. and in the washer-disinfector. Mains water with a hardness level higher than 0.7 mmol/l (4 °dH – German scale) needs to be softened. This takes place automatically in the integrated water softener.

The water softener requires

–

reactivation salt.

The washer-disinfector must be

–

programmed to correspond to the water hardness in your area.

– Your local water authority will be able

to advise you on the water hardness in your area.

Where the water hardness fluctuates e.g. between 1.4 - 3.1 mmol/l (8 - 17 °dH German scale) always programme the washer-disinfector to the higher value (3.1 mmol/l in this example).

The built-in water softener has settings from 1 °dH - 60 °dH (0.2 -

10.8 mmol/l).

In the event of a fault, it will help the service technician if you know the hardness of your local water supply.

Enter the water hardness below:

Programming the water softener

Switch off the machine.

Turn the programme selector to f.

Press ß and 6 at the same time,

hold them in and, whilst doing so, switch the machine on with the I-0 switch.

The current programme status P.... will

appear in the display. The indicator light p / 6 will come on.

Press 0 once.

E01 will appear in the display.

^ Turn the programme selector one

switch position clockwise (1 o'clock position).

The number 19 will appear in the display (the factory water hardness default setting in °dH, equivalent to

3.4 mmol/l).

^ Press ß as many times as

necessary, or hold it in until the required value (degree of hardness in °dH) appears in the display.

See table on the next page for water hardness settings in °dH, mmol/l and °f.

Once the number 60 has been reached, the counter will begin again at

Press 6.

°dH / mmol/l

SP will appear in the display.

Press 6 again.

The setting will now be stored in memory. The display will clear.

The machine is now ready for use.

Water softener

Table of settings

°dH mmol/l °f Setting

0*) 1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 **) 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

1 2 3 4 5 6 7 8 9

0.2

0.4

0.5

0.7

0.9

1.1

1.3

1.4

1.6

1.8

2.0

2.2

2.3

2.5

2.7

2.9

3.1

3.2

3.4

3.6

3.8

4.0

4.1

4.3

4.5

4.7

4.9

5.0

5.2

5.4

5.6

5.8

5.9

6.1

6.3

6.5

6.7

6.8

7.0

2 4 5 7

9 11 13 14 16 18 20 22 23 25 27 29 31 32 34 36 38 40 41 43 45 47 49 50 52 54 56 58 59 61 63 65 67 68 70

°dH mmol/l °f Setting

40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

7.2

7.4

7.6

7.7

7.9

8.1

8.3

8.5

8.6

8.8

9.0

9.2

9.4

9.5

9.7

9.9

10.1

10.3

10.4

10.6

10.8

72 74 76 77 79 81 83 85 86 88 90 92 94 95 97

99 101 103 104 106 108

40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

*) The "0" setting is only for machines

which do not have a water softener

**) Factory default setting

Water softener

Filling the salt reservoir

Only use special coarse grained reactivation salt with granules of approx.1-4mm.Donotuseother types of salt such as cooking salt, agricultural grade or gritting salt. These may contain insoluble additives which can impair the functioning of the water softener. If in doubt consult the Miele Professional Department.

The salt reservoir holds approx. 2.5 kg of salt.

Inadvertently filling the salt

reservoir with cleaning agent will damage the water softener. Before filling the salt reservoir make sure that you have picked up the right packet of reactivation salt.

Remove the bottom basket from the

machine.

Unscrew the salt reservoir cap.

Before filling the salt reservoir with reactivation salt for the first time, you must fill it with approx. 2.5 litres of water to enable the salt to dissolve. Once the washer-disinfector has been used, there is always sufficient water in the reservoir.

Place the funnel provided in position.

Fill carefully with salt.

As it is poured in, displaced water will run out.

Water softener

^ Remove the funnel and wipe any

residual salt off the seal and the screw threads on the socket.

^ Screw the cap back on firmly.

^ Run the PRE-RINSE D programme to

remove any traces of salt from the cabinet.

The programme sequence may be delayed for a few minutes after the start of the PRE-RINSE D programme. This is not a fault. The water softener is being reactivated.

Add salt indicator

Reactivation takes place automatically during a programme. The programme sequence indicator light a k lights up whilst this is happening.

^ Add salt when the Add salt b k

indicator lights up.

Areas of application

This washer-disinfector normally requires an upper and a lower basket. Various inserts and special baskets are also available for a wide variety of instruments and utensils.

Select baskets and inserts which are appropriate for the application.

Notes on the individual areas of application and examples of loading are given on the following pages.

Before starting a programme you should carry out a visual check on the following:

– Is everything correctly

loaded/connected for cleaning?

– Are the lumen or necks of hollow

instruments positioned so that water can access them unhindered?

– Are the spray arms clean and do

they rotate freely?

At the end of each programme:

Carry out a visual check of the load

–

for cleanliness.

Check that all hollow shafted

–

instruments are still securely located on their jets.

Any hollow instruments that have

become disconnected from their adapters during processing must be re-processed.

Check that the lumen of hollow

–

instruments are free of obstruction.

– Check that jets and connectors are

securely held in position in the baskets or inserts.

Protein test

Cleaning results should be subjected to periodic protein tests, e.g. with the Miele test kit.

–

Are the filters clean? Remove any coarse soiling and clean them properly if necessary.

–

Is the adapter connecting the water supply to the spray arms/jets correctly connected?

–

Are all chemical containers filled sufficiently?

Areas of application

Loading the machine

Arrange the load so that water can

–

access all surfaces. This ensures that they get properly cleaned.

Do not place items to be cleaned

–

inside other pieces where they may be concealed.

Hollow instruments must be

–

throughly cleaned, internally and externally.

Ensure that instruments with long

–

narrow hollow sections can be flushed through properly before placing them in inserts or connecting them to jets.

– Hollow vessels should be inverted

and placed in the correct baskets and inserts to ensure that water can flow in and out of them unrestricted.

– Deep-sided items should be placed

at an angle to make sure water runs off them freely.

–

Tall, narrow, hollow items should be placed in the centre of the baskets to ensure better water coverage.

–

Lightweight items should be secured with a cover net (e.g. an A 6) and small items placed in a mesh tray to prevent them blocking the spray arms.

It is advisable to use instruments

–

made of surgical steel only, as these are not susceptible to corrosion.

Nickel plated instruments and

–

coloured anodised aluminium instruments are not suitable for machine processing.

Plastic items must be thermally

–

stable.

Disposable instruments must not be

–

processed in the machine.

Preparing the load

^ Empty all containers before loading

into the machine (paying particular attention to regulations regarding infectious diseases and epidemics).

Ensure that acids and residual solvents, especially hydrochloric acid or chlorides, do not get into the wash cabinet.

Loading instruments

Contaminated instruments can be placed directly in the machine without pre-treatment (no soaking required).

–

Mobile units or baskets with an adapter must engage correctly.

–

The spray arms must not be blocked by items which are too tall or which hang down in their path.

Areas of application

Water connection spring adapter

Make sure that the spring adapter for water connection engages correctly when a basket or injector unit is inserted in the machine. It must be 4-5 mm higher than the water connection inlet in the machine.

If it is not, adjust the adapter accordingly.

Height adjustable top basket

The top basket can be adjusted above and below the middle position by 2 cm.

Different height items can be processed in this machine depending on the position the top basket is set at and the inserts used.

To adjust the top basket:

Pull out the top basket until a

resistance is felt; lift from the runners and remove.

Unscrew the roller bearings on both

sides of the basket with a 7mm spanner and reposition as required.

Loosen lock ring a.

Push up adaptor b.

Tighten lock ring c.

Areas of application

Upper basket/injector unit O 177/1

Left hand side of basket: holder and 28 jets in silicone holders for the direct injection of hollow instruments. This ensures adequate cleaning and disinfection both internally and externally.

Right hand side of basket: free e.g. for E 337 insert for upright instruments.

To minimise the risk of injury from instruments that are sharp at each end, and when arranging instruments that have a probe pointing upwards, instruments should be loaded starting at the back and working forwards, and unloaded starting at the front and working backwards.

Upper basket/injector unit O 177/1

With E 413 insert for 6 thermally stable suction tubes (e.g. Sirona System).

Hollow instruments and tubes must be dried internally with filtered compressed air. This also ensures there are no blockages.

Dental

A special holder AUF 1 (optional extra) is required for processing hand pieces and contra angles in top basket O 177/1. Separate operating instructions are supplied with the holder.

Fibre optic hand pieces and contra angles should be monitored frequently. Those with fibre optic rods are more durable than those with fibre optic strands.

Areas of application

Care should be taken immediately after treating a patient that as little dental cement or amalgam, polishing paste etc. remains on the instruments as possible. If necessary wipe off excess with a swab. Manual cleaning can be carried out if required after thermal disinfection in accordance with national health and safety regulations.

Rhodium plated specula must be arranged in such a way that they cannot suffer mechanical damage. Not all specula with glass are suitable for machine processing.

Lower basket /carrier U 874/2

for inserts, e.g. E 130 and E 379.

Lower basket /carrier U 874/2

for inserts, e.g. E 131/1 for 5 mesh trays with support E 146 or 5 mesh trays with support E 363 for double ended instruments.

Areas of application

E 147/1

for 10 - 12 mouth rinse beakers.

It is preferable for mouth rinse beakers to be washed in the top basket. Greater fluctuations in temperatures and mechanical action in the bottom basket area can cause stress cracks and corrosion.

Chemical processes and technology

General notes

Problem How to resolve it

If seals, hoses and plastics in the washer-disinfector suffer damage they will not be water-tight and will not function correctly.

Heavy foaming during a programme affects cleaning and rinsing results. Foam escaping from the wash cabinet can cause damage to the washer-disinfector. Cleaning processes cannot be regulated and validated where there has been a build-up of foam..

Corrosion to stainless steel in the wash cabinet and to accessories can give them a different appearance:

– rust (red marks / discolouration), – black marks / discolouration, – white marks / discolouration (etched

surface).

Corrosive pitting can lead to the washer-disinfector not being water-tight. Depending on application, corrosion can influence cleaning and rinsing results (laboratory analysis) or cause corrosion to stainless steel items in the cabinet.

Establish the cause of the damage

–

and rectify it.

See information regarding "Chemical agents", "Soiling" and "Reaction between chemical agents and soiling".

Establish the cause of the foam and

–

rectify it. Check the process used regularly to

–

monitor foaming levels.

See information regarding "Chemical agents", "Soiling" and "Reaction between chemical agents and soiling".

– Establish the cause of the corrosion

and rectify it.

See information regarding "Chemical agents", "Soiling" and "Reaction between chemical agents and soiling".

Chemical processes and technology

Chemical agents

Problem How to resolve it

The ingredients in chemical agents have a strong influence on the longevity and functionality (throughput) of the dispensing system. The dispensing system (hoses and pumps) should be set up for a particular type of chemical agent.

General types:

alkaline to pH neutral products,

–

acidic to pH neutral products

–

Chemical agents can damage elastomers and plastics in the washer-disinfector and accessories.

Observe the chemical agent

–

manufacturer's instructions and recommendations.

Carry out a regular visual check of

–

the dispensing system for any damage.

Check the flow rate of the dispensing

–

system regularly.

– Observe the chemical agent

manufacturer's instructions and recommendations.

– Carry out a regular visual check of

any accessible elastomers and plastics for damage.

Chemical processes and technology

Chemical agents

Problem How to resolve it

The following chemical agents can cause large amounts of foam to build up:

cleaning agents and rinsing agents

–

containing tensides, emulsifiers.

– Foam can occur:

in the programme block in which the

–

chemical agent is dispensed, in the following programme block if it

–

has been spilt,

– in the following programme with

rinsing agent if it has been spilt.

De-foaming agents, especially silicone based ones can cause the following:

– deposits to build up in the cabinet, – deposits to build up on the load, – damage to elastomers and plastics

in the washer-disinfector,

– damage to certain plastics (e.g.

polycarbonate and plexiglass) in the load being processed.

Process parameters in the wash

–

programme, such as dispensing temperature, dosage concentration etc. must be set to ensure the whole process is foam free or very low foaming.

Please observe the chemical agent

–

manufacturer's instructions.

– De-foaming agents should be used

in exceptional cases only, for instance when absolutely essential for the process.

– The wash cabinet and accessories

should be periodically cleaned without a load and without de-foaming agent using the SPECIAL 93°C-10' programme.

–

Please contact Miele for advice.

Chemical processes and technology

Soiling

Problem How to resolve it

The following substances can lead to a heavy build-up of foam during washing and rinsing:

some disinfecting agents and

–

dishwashing detergents, active foaming agents such as

–

tensides.

The following substances cause corrosion to stainless steel in the wash cabinet and on accessories:

– hydrochloric acid, – other substances containing

chlorides such as sodium chloride

etc., – concentrated sulphuric acid, – chromic acid, – particles of iron and swarf.

Reaction between chemical agents and soiling

Problem How to resolve it

Soiling containing high protein levels such as blood can cause a heavy build-up of foam when processed with alkaline chemical agents.

Thoroughly rinse items in water

–

beforehand. Select a cleaning programme with at

–

least one short pre-rinse in cold or hot water.

Thoroughly rinse items in water

–

beforehand. Place items drip dried into mobile

–

units, baskets and inserts and then place these in the wash cabinet.

–

Select a cleaning programme with at least one short pre-rinse in cold water.

Non-precious metals such as aluminium, magnesium and zinc can release hydrogen when processed with very acidic or alkaline chemical agents (oxyhydrogen reaction).

–

Please observe the chemical agent manufacturer's instructions.

Only use agents formulated

specifically for use in washerdisinfectors and make sure you follow the manufacturer's instructions. Pay particular attention to information regarding toxic residues.

Adding rinsing agent

Rinsing agent is necessary to ensure water does not cling and leave marks on items, and to help items dry faster after they have been washed. Rinsing agent is poured into the storage reservoir and the amount set is dispensed automatically.

The rinsing agent reservoir holds approx. 180 ml.

Dispensing chemical agents

Open the door fully.

^ Undo the screw cap.

Only fill the rinsing agent reservoir with rinsing agent formulated for washer-disinfectors. Do not fill it with cleaning agent. This would damage the reservoir.

Add rinsing agent until the level indicator is dark (see arrow in the illustration). Use a funnel if necessary.

Screw the cap back on.

Mop up any spilt rinsing agent. This prevents over-foaming occurring during the next programme.

Dispensing chemical agents

Add rinsing agent indicator

^ Add rinsing agent to the rinsing

agent reservoir when the Add rinsing agent indicator H lights up.

Setting the dosage

The dosage adjuster in the opening has settings adjustable from 1 to 6 (1-6 ml). It is set to 3 (3 ml) at the factory.

If spots appear on items:

^ Use a higher setting.

If clouding or smearing appears on items:

^ Use a lower setting.

Dispensing chemical agents

Adding neutralising agent

Neutralising agent is used in the interim rinse stage of some programmes to help prevent discolouration and rust spots appearing on the items being cleaned, especially at the joints. Neutralising agent (pH-level: acidic) neutralises residues of alkaline cleaning agents on the surface of instruments and utensils.

If the cleaning agent being used is mildly alkaline, you will need to use a phosphoric acid based neutralising agent. If using a neutral enzyme based liquid cleaning agent, you will need to use a citric acid based neutralising agent.

The neutralising agent is automatically dispensed in Programme stage Rinse 2 following the cleaning cycle of a programme. The dispensing system container needs to be filled with neutralising agent and vented.

When refilling the red container with

neutralising agent you could place it on the open wash cabinet door or on a surface which is easy to clean.

^ Insert the siphon tube into the

container and screw on securely (observe the colour code).

See "Programmable functions" for details on how to vent the dispensing system and set the dosage.

Dispensing chemical agents

Add neutralising agent indicator

^ Refill the neutralising agent container

or replace it with a full container when the Add neutralising agent indicator w lights up.

Please remember to refill the container in good time. Do not let it get empty.

Dispensing chemical agents

Adding cleaning agent

Only use cleaning agents

suitable for washer-disinfectors. Do not use cleaning agents designed for domestic dishwashers.

A liquid cleaning agent can be dispensed via the optional DOS module K 60 (DOS 1, dispensing pump for liquid cleaning agent). The machine must be set up for this by a Miele approved service technician. The DOS module is connected externally. See "Programmable functions" for details on how to vent the dispensing system and set the dosage.

We recommend using a DOS module (available as an optional extra) for the dispensing of liquid cleaning agent.

Adding powder cleaning agent

Do not inhale or ingest powder

cleaning agent. It can cause burning in the mouth and throat and inhibit breathing.

When using upper basket O 190/1 liquid cleaning agent must be dispensed from the DOS module K 60.

Powder cleaning agent must be placed in the powder cleaning agent dispenser before every programme (except with D "PRE-RINSE" and 6 "DRAIN").

Dosage example:

Approx. 10.5 litres of water are taken into the machine in the "Main wash" programme stage. 30 g of cleaning agent will be required for a cleaning agent concentration of approx. 3 g/l.

Follow manufacturer's instructions if they differ.

Dispensing chemical agents

Press the button on the powder

cleaning agent dispenser. The flap will spring open.

The flap is always open at the end of a programme.

At the end of the programme,

check that there are no cleaning agent residues remaining in the dispenser. If there are, you will need to repeat the programme.

For environmental reasons, please consider the following points when selecting a cleaning agent:

What level of alkalinity is required to

achieve the correct level of cleaning?

Is active chlorine required for

disinfection or oxydation (pigment removal)?

^ Are tensides required for dispersal

and emulsification?

^ Only use specially formulated

cleaning agents which are mildly alkaline and free of active chlorine in thermal disinfecting programmes.

Add powder cleaning agent to the compartment.

Close the dispenser lid.

Some types of soiling may require different combinations of cleaning agents and other additives. The Miele Professional Department will be pleased to advise you.

Operation

Switching on

Close the door.

Open the stopcocks.

Press the I-0 switch.

When the programme selector is at f, a dot lights up in the display.

Starting a programme

Choose your programme according to the type of instruments or utensils being cleaned and the degree of soiling.

The different programmes and their uses are described in the Programme chart at the end of this booklet.

Turn the programme selector clockwise or anti-clockwise to the required programme.

The temperature of the first stage of the programme selected will appear in the display, except with Pre-rinseD and Drain 6. The indicator light next to the start button 6 will flash.

Selecting the Drying 0 additional function

The Drying additional function may be selected immediately after the programme has been selected (except with Pre-rinse D and Drain 6).

To do this:

^ Press 0.

The programme will be extended by Drying blocks 1 (if available) and 2; see Programme chart.

Drying time 2 is saved and shows in the display. This can be altered in 5 minute steps by pressing the 0 button. The new drying time is programmed in for the programme selected after the programme start. The total running time for the programme increases accordingly.

Operation

Press the Start button 6.

The current temperature will appear in the display. The indicator light next to the Start button 6 will light up.

Once the programme is running, all the other programmes are blocked. If the programme selector is then turned to another programme, the values shown in the display will go out. The values can be seen again if the programme selector is turned back to the position of the programme currently in operation.

During a programme, you can switch between the following displays:

– The current temperature,

– The elapsed programme duration

and

– The current Wash block:

1 = Pre-wash 1 2 = Pre-wash 2 3 = Main wash 1 4 = Main wash 2 5 = Chemical disinfection* 6 = Rinse 1 7 = Rinse 2 8 = Rinse 3

9 = Rinse 4 10 = Final rinse 1 11 = Final rinse 2 12 = Drying 1 13 = Drying 2

Programme sequence indicators

The indicator light for the current programme stage lights up during the programme:

k Reactivation

I Pre-wash1+2

l Main wash1+2*

H Rinses1-4/

Final rinse1+2

c Drying

r End of programme (Programme

parameters have been achieved)

* Rinse block 5 (normally for chemical disinfection) can be programmed in as an extra stage in freely programmable Programme A. It is then not possible to dispense chemical disinfection agents. The programme sequence indicator l will light up when Rinse block 5 is active.

Press the ß button to switch between the displays.

Operation

At the end of a programme

The programme has ended correctly when r lights up constantly in the programme sequence display and the 6 indicator has gone out. An 0 will appear in the middle of the display. All the other indicators come on and go out in sequence.

At the same time a buzzer sounds for a maximum of 30 seconds (default setting). The buzzer can be changed; see "Programmable functions".

Use the ß button to call up the total running time of a programme or the current temperature.

Additional drying

If additional drying is required after the end of a programme, the 6 programme can be used with the Drying additional function. The running time for this is approx. 1 minute in addition to the drying time displayed.

Switching off

Press and release the I-0 switch.

As the machine is fitted with an electric door lock, the door can only be opened if the I-0 switch is pressed in (see "Opening and closing the door").

Operation

Cancelling a programme

Where a programme is

cancelled, the items must be reprocessed.

Programme cancellation due to a fault

If the programme is cancelled before completion, a fault message "F.." will appear in the display.

Depending on the cause, the appropriate measures must be taken to resolve the problem. Proceed as described in "Problem solving guide".

Cancelling the programme manually

Once a programme is running, it should only be cancelled in extreme cases, e.g. when articles in the machine rattle or jostle against each other and have to be rearranged.

When testing to EN ISO 15883-1 or HTM 2030 standards, a programme must not be interrupted or cancelled.

With officially registered epidemics, any contaminated water must be decontaminated using a disinfecting agent before it is discharged into the sewerage system.

Turn the programme selector to f.

The programme will be cancelled after approx. 2 seconds.

Open the door with a.

Caution. Water and items in the

machine may be hot. Danger of burning or scalding.

Arrange the load securely.

(Wear protective gloves where necessary, and observe appropriate health and safety regulations relating to infectious diseases).

^ Replenish powder cleaning agent if

necessary.

^ Close the door.

^ Start the Drain 6 programme.

The water will drain away.

^ Select and start the programme

again.

The following procedure should be followed when dealing with official cases requiring the containing of epidemics using the SPECIAL 93°C-10’ programme:

Start the programme again.

The display will show the temperature holding time required counting downwards.

Programmable functions

For future servicing work, please document any alterations to the factory default settings. Enter any alterations in the appropriate box.

General notes:

Switch positions that have not been allocated a function are indicated in the

–

middle part of the display by a bar ( - ).

The programming level is called up via the f position.

–

It is shown as E.. in the display.

When processing medical devices, any changes made to programmes or

–

dispensing systems must be documented in a log book kept with the machine (in accordance with the Medical Devices Directive). The machine's cleaning and disinfecting standards must also be re-validated.

The following applies to all programmable functions:

To activate programming mode

^ Turn the programme selector to f.

^ Switch off the machine.

^ Press ß and 6 at the same time,

hold them in and, whilst doing so, press the I-0 switch.

To save values and exit from programming mode

Press 6.

Press 6 again.

To exit from programming mode without saving

Switch the machine off with the I-0 switch.

The current programme version P.. will appear in the display. The p / 6 indicator light comes on.

SP will appear in the display.

The alteration is now saved.

The alteration will not be saved.

Programmable functions

Resetting the operating hours counter for the filter in the drying unit

After the filter in the drying unit has been changed, the operating hours counter needs to be reset.

Step Display / Result

Press 0 as often as necessary or hold it

pressed in until E04 appears in the display.

E04

Turn the programme selector to the 7 o'clock position.

Press ß once.

Once the setting has been saved and you have come out of programming mode, the operating hours counter will go out.

The current value will appear in the display, e.g. 105

000

Programmable functions

Dispensing liquid cleaning agent via DOS 1

Setting the dosage concentration

The dosage concentration must be set exclusively for liquid cleaning agent. Set it according to the manufacturer's recommendations or the official standards required. The dosage concentration must not be altered even if powder cleaning agent is dispensed via the dispenser in the door.

Step Display / Result

Press 0 until E02 appears.

Turn the programme selector to E.

without DOS Module connected: with DOS Module connected:

^ Press ß as many times as necessary or

hold pressed in until the required value appears in the display, e.g. 0.50.

Dosage concentration set:

E02

10 = 10 sec dosage duration

1.00 = 1.0 % dosage concentration

0.50

The dosage duration/concentration level has now been set.

Venting the dispensing system

The dispensing system must be vented: – when the dosage concentration is set for the first time, – if the liquid cleaning agent container runs out and is not refilled in time.

Step Display / Result

Press 0 until E02 appears.

Turn the programme selector to A.

Press ß.

Exit from programming mode. Then start the Pre-rinse D programme.

E02

d§1

The dispensing system will be vented automatically. 0 will appear in the display when the venting process has finished.

Any agents which are in the wash cabinet after the venting process will be diluted before being drained away.

Programmable functions

Dispensing neutralising agent via DOS 3

Setting the dosage concentration

The dosage concentration for the neutralising agent must be set according to the manufacturer's recommenedations or the official standards required.

Step Display / Result

Press 0 until E02 appears.

Turn the programme selector to the 6

o'clock position.

E02

The dosage concentration which has been programmed in will appear in the display, e.g. 0.10 = 0.10 %

^ Press ß as many times as necessary or

hold pressed in until the required value appears in the display, e.g. 0.20.

Dosage concentration set:

Venting the dispensing system

The dispensing system must be vented: – when the dispensing system is used for the first time, – if the chemical agent container runs out and is not refilled in time.

Step Display / Result

Press 0 until E02 appears.

Turn the programme selector to the 5 o'clock position.

Press ß.

Exit from programming mode. Then start the Pre-rinse D programme.

0.20

The dosage concentration level has now been set.

E02

d§3

The dispensing system will be vented automatically. 0 will appear in the display when the venting process has finished.

Any agents which are in the wash cabinet after the venting process will be diluted before being drained away.

Programmable functions

Buzzer

A buzzer can be programmed for the following: – a constant tone will sound at the end of a programme, – a buzzer will sound at one second intervals as a fault warning, and – 3 short beeps followed by a 2 second pause, then 3 short beeps etc will sound

as a reminder to remove a test item. The reminder to remove a test item function has to be programmed by a Miele service technician or an authorised and trained Miele Service Dealer.

The buzzer settings are displayed as numbers:

20 Switched off 21 At the end of a programme (factory default setting) 22 Fault indication 23 At end of a programme + fault indication 24 Reminder to remove a test item 25 At the end of a programme + reminder to remove a test item 26 Fault indication + reminder to remove a test item 27 At the end of programme + fault indication + reminder to remove a test item.

Step Display / Result

^ Press 0 until E04 appears.

E04

^ Turn the programme selector to E.

Press ß repeatedly or hold pressed in until the required number appears in the display, e.g. 26.

Value set:

The buzzer will sound at the setting selected for 30 seconds. To switch the buzzer off early:

–

turn the programme selector to f,

–

press ß.

–

interrupt the electricity supply, e.g. open the door.

Programmable functions

Changing programme parameters

The settings for individual parameters set at the factory are outlined in the Programme chart at the end of these operating instructions. Programme parameters can only be changed if they are activated in a programme; see Programme chart. Any changes carried out must be documented, e.g. handwritten into the corresponding column of the Programme chart.

Changing the wash parameters

The parameters for the cleaning programmes can be changed to suit particular requirements. To do this the temperature and the temperature holding time in the Main wash 1 and Final rinse 2 programme blocks can be changed.

The programme parameters for the Main wash 1 programme block in the SPECIAL 93°C-10' programme cannot be changed. Temperatures over 55°C result in blood denaturation and fixing. On the varioTD programme, take note of the appropriate requirements for infection prevention.

Values which can be set for the temperature: 30 °C - 93 °C in the A and vario TD programmes, 30°C - 70°C in the E programme.

Values which can be set for the holding time: 1-15 mins.

Changing the drying parameters

The parameters for drying can be changed to suit particular requirements. The temperature and drying time can both be changed in programme blocks Drying 1 (if available) and 2.

Values which can be set for the temperature: 50°C - 99°C

Values which can be set for the drying time: Drying 1: 1-99 minutes in 1-minute steps Drying 2: 5-95 min in 5-minute steps

The drying time for programme block Drying 2 can also be altered using the 0 button (see "Operation, Selecting the Drying 0 additional function").

Programmable functions

Changing the temperature

Step Display / Result

Press button 0 as often as necessary or hold

pressed in until the level of the programme block you wish to change appears in the display.

Turn the programme selector to the programme you

wish to change, e.g. E.

Press ß or hold pressed in until the required value

appears in the display, e.g. 70 °C.

Changing the temperature holding time

Step Display / Result

^ Press button 0 repeatedly, or hold pressed in until

the level of the programme block you wish to change appears in the display.

^ Turn the programme selector to the programme you

wish to change, e.g. E.

E09 for Main wash 1 E25 for Final rinse 2 E28 for Drying 1 E31 for Drying 2

°C ~60

°C ~70

E10 for Main wash 1 E26 for Final rinse 2 E29 for Drying 1 E32 for Drying 2

min _ 3

Press ß repeatedly or hold pressed in until the required value appears in the display, e.g. 10.

min _ 10

Programmable functions

Resetting to factory default settings

Step Display / Result

Press 0 as often as necessary or hold it pressed in

until E33 appears in the display.

Turn the programme selector to a programme.

Factory default setting: Electronics have been programmed to another setting:00PP

Press ß when PP shows in the display.

The water softener has been reset to the factory default setting. It will need to be reprogrammed; see "Programming the water softener". Programme changes which have been made to the freely programmable Programme A will be kept and will not be reset.

E33

00, the factory default

settings have been reinstated.

Programmable functions

Setting the time and date

The serial interface contains the date and time. This data is transmitted to the report printer.

You can reset the date and time, e.g. to change from summer to winter time.

The individual values of date and time are activated according to the position of the programme selector:

"1 o'clock" position: Calendar day 01 - 31

"2 o'clock" position: Month 01 - 12

"3 o'clock" position: Year 00 - 99 = 2000 - 2099

"4 o'clock" position: Hours 00 - 23

"5 o'clock" position: Minutes 00 - 59

If the serial interface has not been activated, a - will appear in the display for each programme selector position when Level E34 is selected.

Step Display / Result

^ Press 0 repeatedly or hold it pressed in until

E34 appears in the display.

E34

Wait approx. 30 seconds before carrying out the next step.

^ Turn the programme selector to the position of the

value you want to change, e.g. the "4 o'clock" position to change the hours.

Press ß repeatedly or hold pressed in until the required value appears in the display, e.g. 1 x.

The new values will be transmitted to the serial interface after the values have been saved and you have come out of the programming mode. For this reason, wait approx. 30 seconds before switching off the washer-disinfector.

The control unit is reading the current values.

Process documentation

The washer-disinfector is capable of documenting processing procedures (process documentation). Process documentation can be carried out either by using documentation software or via a printer. To do this the washer-disinfector is fitted with a serial interface located at the rear of the machine.

The interface must be configured by a Miele approved Service technician.

Process documentation using documentation software

The process documentation is transferred using external documentation software for digital archiving.

Process documentation using a report printer

The process reports are printed on a report printer connected to the machine and then archived in paper form.

Only use data terminals (e.g. printers) which are certified in accordance with EN/IEC 60950.

A report containing the following data will be produced during a programme sequence:

Date and machine number

–

Programme start and programme

–

name

Blocks used in the programme

–

Dispensing system with dosage

–

temperature and where appropriate dosage amount.

Target values for temperature and

–

temperature holding times

– Minimum temperature during the

temperature holding time

– All faults (e.g. Water inlet fault)

– Programme end

– Messages, e.g. insufficient salt

Reports can be produced in German, English, French, Italian and Spanish.

Please contact Miele if you require further information about suitable printers and software.

Maintenance

Periodic checks

This washer-disinfector should be serviced by a Miele approved service technician in accordance with local and national safety regulations after every

1000 operating hours, or every 12-18 months.

A service will cover the following:

Electrical safety tests

–

Door mechanism and door seal

–

Any screw connections and

–

connectors in the wash cabinet

– Water inlet and drainage

– Internal and external dispensing

systems

– Spray arms

– Filter combination

– Sump including drain pump and

non-return valve

The following operational tests will be carried out within the framework of the maintenance:

A programme will be run as a test

–

run

Thermo electrical measurements will

–

be taken

Seals will be tested for water

–

tightness

All relevant measuring systems will

–

be safety tested including fault indications.

– All baskets, inserts and modules

–

Drying unit

and where applicable:

–

Steam condenser

–

Any printer connected to the machine.

Maintenance

Process validation

The standard of disinfection in the disinfection programmes must be confirmed by the user as a routine matter. In the UK, safety checks should be carried out to the machine every 3 months by a Miele approved service technician in accordance with EN ISO 15883 and HTM 2030.

Routine checks

Before the start of each working day, the user must carry out a number of routine checks. A check list is supplied with the machine for this purpose.

The following need to be inspected:

All filters in the wash cabinet

–

The spray arms in the machine and

–

in the baskets

The wash cabinet and the door seal

–

The dispensing systems

–

– Baskets and inserts

If powder cleaning agent is being used, the temperature at the time of dispensing must be checked every two weeks. The dispensing temperature for validation is set out in the validation report. Check the dispensing temperature as follows. During a programme sequence, check the temperature which shows in the display when you hear the container lid spring open. Document this temperature and compare it to the data stated in the validation report.

You must inform the Miele Ser vice Department if the dispensing temperature displayed differs from the temperature set out in the validation report by more than +/- 2°C.

Maintenance

Cleaning the filters in the wash cabinet

The filters in the base of the wash cabinet are designed to prevent coarse soiling getting into the circulation system. A build-up of coarse soiling can cause the filters to clog up. They should, therefore, be checked daily and cleaned if necessary.

The machine must not be used

without all the filters in place.

Watch out for glass splinters,

needles etc. which could cause injury.

Cleaning the coarse filter

^ Press the two lugs together, remove

and clean the coarse filter.

^ Put the clean filter back in position

and press until it clicks in place.

Maintenance

Cleaning the flat and micro-fine filters

Remove the coarse filter.

Remove the fine filter from between

the coarse and the micro-fine filters.

^ To unscrew the micro-fine filter, take

hold of the two lugs and turn twice in an anti-clockwise direction.

Then remove the micro-fine filter

together with the flat filter.

^ Clean the filters.

^ Replace the filters by carrying out the

above steps in the reverse order. Ensure that the filters sit flat in the base of the wash cabinet.

Maintenance

Cleaning the spray arms

The spray arms can become blocked and should therefore be checked every day.

Use a sharp pointed object to push

particles into the spray arm jets, and rinse well under running water.

Remove the spray arms as follows:

Take any baskets out of the wash

cabinet.

Spray arm on top basket or mobile unit (if present):

^ Loosen the nut on the spray arm and

take the spray arm off.

Metal nuts have a left-hand thread. Ceramic nuts have a right-hand thread.

Unscrew the upper spray arm.

Loosen the knurled thumb nut to

unscrew the lower spray arm.

After cleaning the spray arms, fit or

screw them back into position.

After replacing the spray arms, check that they rotate freely.

Maintenance

Cleaning the control panel

The control panel should only be

cleaned using a damp cloth or with a proprietary cleaning agent for glass or plastic surfaces. An approved and listed disinfecting agent can be used to wipe surfaces.

Do not use abrasive cleaners or

all-purpose cleaners. Because of their chemical composition they could cause serious damage to plastic components.

Cleaning the front of the machine

Never clean the machine or near

vicinity with a hose or a pressure washer.

Cleaning the wash cabinet

The wash cabinet is generally self-cleaning.

However, should a build-up of deposits occur in the cabinet please contact Miele for advice.

Cleaning the door seals

The door seals should be cleaned regularly with a damp cloth to remove any soiling.

^ The front should be cleaned using a

damp cloth and a little washing-up liquid, or with a non-abrasive proprietary cleaning agent designed for use on stainless steel.

^ To help prevent resoiling

(fingermarks etc.) a stainless steel conditioning agent (available from the Miele Spare Parts Department or via the internet on www.miele-shop.com) can also be used.

Do not use any cleaning agents containing ammonia or thinners as these can damage the surface material.

Seals which are no longer tight or which have suffered damage must be replaced with new ones by an approved Miele technician.

Dispensing systems

When processing chemicals are being used, they should be monitored regularly for any dispensing irregularities.

Baskets and inserts

Baskets and inserts should be checked daily to make sure they are functioning correctly. The washer-disinfector is supplied with a check list.

The following need to be inspected:

Check that rollers on baskets/inserts

–

are free of hindrance and that they are secure.

Check that the basket connector is at

–

the correct height and screwed on correctly.

– Check that jets, sleeves and hose

adapters are securely held in position in baskets/inserts.

– Check that washing solution can flow

unhindered through all jets, sleeves and hose adapters.

– Make sure caps and closures on

sleeves are correctly located.

Maintenance

– Check that the locking caps in the

module connectors of modular system mobile units are working properly.

and where applicable:

–

Make sure that the spray arms rotate freely.

–

Make sure the spray arm jets are free of any blockages. See "Cleaning the spray arms".

–

Does the filter plate in the insert for hand pieces and contra-angles or in the E 478 for Sautter cannulae need changing?

Maintenance

Drying unit (TA) - Maintenance

SF2 in the display: Change the filter

The filter must be changed if SF2 starts to flash in the display.

To ensure the machine operates correctly, use original Miele HEPA filters only (classification 12).

Remove the filter from its holder, and

replace with a new one.

^ Lift the service panel upwards and

push until it clicks shut.

Reset the filter operating hours counter after changing the filter. See "Programmable functions" for how to do this.

^ Press the service panel firmly at both

sides and keep pressing (1) to release the locking mechanism.

Place a finger into each of the openings below the service panel (2) and push up the locking mechanism.

Pull the service panel forwards to open it.

Problem solving guide

The following guide may help to find the reason for a fault and to correct it. You should, however, note the following:

Repairs should only be carried out by a Miele authorised and trained ser

vice technician in strict accordance with current local and national safety regulations. Unauthorised or incorrect repairs could cause personal injury or damage to the machine.

To avoid unnecessary service call-outs, check that the fault has not been caused by incorrect operation.

To do this:

Turn the programme selector to f (the fault code goes out).

Switch the machine off with the I-0 switch.

^ Switch the machine on again and reselect the programme.

^ If the problem occurs again and cannot be remedied, please contact Miele Ser-

vice Department.

^ Quote the fault code "F...".

Fault Possible cause Remedy

The machine does not start.

The machine does not work.

The door is not properly closed.

The machine is not connected electrically.

The fuse is defective or has tripped.

The machine is not switched on.

Fault code: F04-F17,

F20-F--

Fault code: F31-33 There is a fault with the

Close the door firmly.

Switch on at the mains.

Reset the fuse. (Minimum fuse rating: see data plate).

Press the I-0 switch and select a programme.

Call Miele Service.

controls for the dispensing system. Call Miele Service.

Problem solving guide

Fault Possible cause Remedy The 8 DOS indicator

starts flashing before the start of a programme. The programme cannot be started.

Fault code: Fdo: The container for liquid

cleaning agent is empty.

A few minutes after the start of a programme, the 8 DOS indicator flashes and the programme is cancelled.

Fault code: Fdo: Fault with the system for

dispensing liquid cleaning agent.

Before trying to rectify the problem, you must:

Turn the programme

–

selector to f (the fault code goes out).

Switch the machine off

–

with the I-0 switch.

Fill the container with liquid cleaning agent or replace it with a new, full container.

Then: – Switch the machine on. – Start the programme

again.

Before trying to rectify the problem, you must:

– Turn the programme

selector to f (the fault code goes out).

– Switch the machine off

with the I-0 switch.

Fill the container with liquid cleaning agent or replace it with a new, full container.

Vent the dispensing system, see "Programmable functions".

Then: –

Switch the machine on.

–

Start the programme again.

Problem solving guide

Fault Possible cause Remedy The w indicator starts

flashing before the start of a programme. The programme cannot be started.

Fault code: Fdo: The neutralising agent

container is empty.

A few minutes after the start of a programme, the w indicator flashes and the programme is cancelled.

Fault code: Fdo: Fault with the system for

dispensing neutralising agent.

Before trying to rectify the problem, you must:

Turn the programme

–

selector to f (the fault code goes out).

Switch the machine off

–

with the I-0 switch.

Fill the container with neutralising agent or replace it with a new, full container.

Then: – Switch the machine on. – Start the programme

again.

Before trying to rectify the problem, you must:

– Turn the programme

selector to f (the fault code goes out).

– Switch the machine off

with the I-0 switch.

Fill the container with neutralising agent or replace it with a new, full container.

Vent the dispensing system, see "Programmable functions".

Then: –

Switch the machine on.

–

Start the programme again.

Problem solving guide

Fault Possible cause Remedy

The Add salt indicator light k flashes.

A few minutes after the start of a programme, the p / 6 indicator flashes and the programme is cancelled.

The salt reservoir was not replenished, meaning that the water softener could not be reactivated.

Fault code: F..E: There is a water inlet fault.

Fill carefully with reactivation salt.

Before trying to rectify the problem, you must:

Turn the programme

–

selector to f (the fault code goes out).

Switch the machine off

–

with the I-0 switch.

Open the stopcock.

– – Clean the water inlet

filter, see "Other problems".

– The water pressure at

the intake is too low. Ask a plumber for advice.

Then: – Switch the machine on. – Start the programme

again.

Problem solving guide

Fault Possible cause Remedy

The programme is cancelled and the p / 6 indicator flashes.

Water in the wash cabinet is not heated; the programme lasts too long.

Fault code: F..A: There is a water drainage

fault.

Fault code: F01 - F03, F18,

F19

This machine has a resettable heater limiter which will switch off the heating elements if they over-heat. This could be caused for example, by large articles covering the heating elements or if the filters in the wash cabinet are blocked.

Before trying to rectify the problem, you must:

Turn the programme

–

selector to f (the fault code goes out).

Switch the machine off

–

with the I-0 switch.

Clean the filters in the

–

wash cabinet. Clean the drain pump.

–

Clean the non-return

–

valve.

– Remove any kinks and

straighten the drain hose.

Then: – Switch the machine on. – Drain the water. – Start the programme

again.

To rectify the problem: – Clean the filters in the

wash cabinet.

–

Rearrange the load.

–

Reset the thermal cut-out (see "Other problems, Thermal cut-out").

Problem solving guide

Fault Possible cause Remedy

Cleaning agent residue is left in the dispenser at the end of a programme.

The detergent dispenser lid cannot be closed properly.

Knocking noise in the wash cabinet.

Rattling noise in the wash cabinet.

Knocking noise in the water pipes.

There is corrosion on instruments.

The dispenser was still damp when detergent was added.

An item was blocking the lid of the powder cleaning agent dispenser.

Clogged detergent residue is blocking the catch.

A spray arm is knocking against an item.

Items are insecure in the wash cabinet.

This may be caused by the on-site installation or the cross-section of the piping.

The instruments are not suitable for machine processing.

Neutralisation has not been carried out during the programme cycle.

Remove the cleaning

–

agent residue Reprocess the items.

–

Make sure the dispenser is dry before adding cleaning agent.

Arrange the items so that the lid can open.

Remove the residue.

Cancel the programme and rearrange the load; see "Cancelling a programme".

This has no influence on the functioning of the washer-disinfector. If in doubt, contact a suitably qualified plumber.

Only clean surgical steel instruments in this machine.

–

Fill the neutralising agent container.

–

Programme a neutralisation step into programmes A and E (this must be done by a Miele approved service technician).

Problem solving guide

Fault Possible cause Remedy

There is corrosion on instruments.

White residue is visible on items.

The chloride content of the water is too high.

Rust has entered the wash cabinet due to:

the iron content of the

–

water being too high, rusty instruments being

–

cleaned in the machine.

The water softener is programmed to a setting which is too low.

The salt reservoir is empty. Fill carefully with salt.

The salt reservoir cap has not been screwed on correctly.

The rinsing agent dosage has been set too low, causing water marks.

Dental cement or amalgam remains have been left on instruments.

Have the water analysed. If necessary, connect the machine to an external water softener unit and use deionised water.

Check the water supply.

–

Dispose of any rusty

–

instruments.

Check the water hardness level of the water supply and programme the water softener correctly.

Replace it making sure it screws back on correctly.

Increase the rinsing agent dosage setting.

Remove dental cement or amalgam from instruments before it hardens.

Problem solving guide

Fault Possible cause Remedy

Items are flecked. The rinsing agent dosage

level has been set too low.

The rinsing agent reservoir is empty.

The cleaning result is unsatisfactory.

Baskets or inserts have been incorrectly loaded or overloaded.

The cleaning agent used is not suitable for the degree of soiling.

Soiling has been allowed to dry onto the items for too long.

One of the spray arms is restricted.

The jets in the spray arms or the inserts are blocked.

The filters in the wash cabinet are soiled.

The basket or insert has not connected to the water inlet point properly.

Increase the rinsing agent dosage setting.

Adding rinsing agent.

Rearrange the items. Do not overload baskets or

inserts.

Use a cleaning agent suitable for machine processing.

Items should only be left after being used for a maximum of 6 hours before machine cleaning.

Rearrange the items.

Check the jets and clean them if necessary.

Check the filters, and clean them if necessary.

Connect the adapter connecting the water supply to the basket or insert properly.

Thermal cut-out

This machine has a resettable heater limiter which will shut off the elements in the event of over-heating. This could be caused for example, by large articles covering the heating elements or if the filters in the wash cabinet are blocked.

If the fault code: F01 - F03, F18, F19 (water was not heated up in the wash cabinet and the programme is taking too long) appears in the display, proceed as follows:

Remove the cause of the fault.

^ Remove the service panel.

^ Press the reset button on the heater

limiter located on the right-hand side of the plinth.

If this switch trips again, contact the Miele Service Department.

Miele G 7891 Operating instructions

Specifications and Main Features

Frequently Asked Questions

User Manual