MELAG Evolution 41B+ Autoclave

Quick, easy-to-use and stand-alone – now with DRYtelligence

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Quick, easy-to-use and stand-alone – now with DRYtelligence

This high-performance practice steam steriliser brings the same record operating times as the almost identical Vacuklav 40 B+ Evolution. Its innovative double chamber technology means the sterilisation and drying of unwrapped instruments in only 10 minutes; wrapped instruments in a Class-B program require no more than 20 minutes. Both times include fractionated pre-vacuum and drying. The intelligent drying system DRYtelligence uses especially-developed algorithms to adapt the drying to the load in order to shorten the operating times even further and save resources. The Vacuklav 41 B+ Evolution is fitted with a patented air-cooling system, making it into a true stand-alone steam steriliser as it requires no connections other than to the electricity supply.

An especial advantage is the integrated software for approval, labelling and traceability of the sterilised instruments. This provides protection for doctor and patient alike. The extra-size of the colour-touch display makes work easier and avoids maloperation. Simply switch on the device, follow the intuitive instructions and enjoy your work.

  • Premium-Plus-Class autoclave
  • Sleep mode button on the front of the unit for energy saving
  • New Blue colour touch screen/ although this can be changed back to the old full colour screen.
  • DRYtelligence technology which adapts the drying time to the load weight
  • New flip down front panel to access the water drain valves, Ethernet connection.
  • Twin chamber technology, using the “Class B” and “Class S” programmes
  • Patented air cooling system
  • Remove unwrapped instruments after only 10 minutes and wrapped instruments after only 17 minutes
  • Integrated software for clearance, labelling and tracing of sterilised instruments
  • 6 tray capacity
Videos

How to perform a daily automatic control test (ACT)

Steam Steriliser Product Highlights: Vacuklav 41 B+ and 43 B+ Evolution | MELAG

Recommissioning your decon room post COVID-19

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Detailed below is a list of event numbers which may appear on your autoclave's display. Click on an event number to see the possible cause of the error or warning and what action should be taken.

Please note the following:

A warning is not an error

Not all messages which appear on the display are error messages. Warning messages and error messages are shown on the display with an event number. This number serves for the identification.

Messages

Many messages are communications which are for your information. Messages are not error messages or warning messages. Such information supports you in the operation of the autoclave.

Warning messages

Warning messages are displayed when necessary. These contain operating procedures for you. Warning messages are not error messages. They help to ensure smooth operation and to recognise undesirable conditions. Observe these warning messages promptly in order to avoid errors.

Error message

Error messages are displayed if safe operation or sterilisation security is not guaranteed. These can appear on the display shortly after switching on the autoclave or while a programme is running. The programme is aborted if a malfunction occurs during a programme run.

If a programme is aborted before the drying cycle is complete, then the load is unsterile. Rewrap and repeat the sterilisation for the affected items.

If you do not find the problem below or the action you take does not solve the problem, please contact our service team on 0800 028 4749. In order to help you, have the serial number of your autoclave and a detailed fault description of the fault report ready.

Event numbers 63, 64 or 65

Possible cause for internal storage tank for feed water

Water with inadequate water quality was poured into water storage tank (>60µS/cm). 

  Action

Empty and clean storage tank and fill with feed water of the quality DIN EN 13060.


Possible cause for water treatment unit

Mixed bed resin pellets in the water treatment unit are exhausted.

Action

Renew mixed bed resin pellets for the water treatment unit.

Event numbers 67, 68 or 76

Possible Cause

Water outlet not guaranteed; the measures for warning of a sink mechanism did not occur. 

Action

Let water drain out, check siphon.

Event number 61

Possible cause for internal storage tank for feed water

No water in the storage tank.

  Action

Fill internal storage tank.


Possible cause for water treatment unit

Produces no water because the water tap is not open.

Action 

Open water inlet for the water treatment unit.

Event numbers 72, 73, 74 or 75

Possible Cause

The feed water quality is declining (>40µS/cm). 

Mixed bed resin pellets - some exhausted.

Action

You can still carry out all work with the autoclave but should fill up the new feed water as soon as possible or renew the mixed bed resin pellets.

Event numbers 78, 79 or 80

Possible Cause

Waste water tank was not or is not fully emptied.

Action

Empty waste water tank completely.

Event numbers 102 or 128

Possible Cause

Waste water hose is bent or installed with a large droop.

Action

Check waste water hose; it must be laid dip-free with continuous descent.

Event number 113

Possible Cause

  • Autoclave was switched off while a programme was running.
  • Power connection not completely made.
  • Power plug was withdrawn.
  • Power loss in the building power supply.

Action

Do not switch off autoclave at the main switch while a programme is running. Check building-end installation; operate autoclave on a separate electric circuit.

Event number 116

Possible Cause

Maximum permissible difference between the theoretical temperature and that measured by temperature sensor 1 (AIN01) is too large.

Action

If the problem persists, call our service team on 0800 028 4749.

Event number 117

Possible Cause

Temperature sensor 1 or 2 is defective; temperature difference is too large.

Action

If the problem persists, call our service team on 0800 028 4749.

Event number 118

Possible Cause

Maximum admissible sterilisation temperature has been exceeded at temperature sensor 1 (AIN01).

  Action

If the problem persists, call our service team on 0800 028 4749.

Event number 119

Possible Cause

Minimum admissible sterilisation temperature not reached at temperature sensor 1 (AIN01).

  Action

If the problem persists, call our service team on 0800 028 4749.

Event numbers 123, 124, 125, 126, 134 or 183

Possible Cause

  • Ambient temperature too high.
  • Built-in autoclave gets no or too little cooling air.
  • Autoclave is overloaded.
  • Autoclave was operated without mounting so that for instance a washing packet has direct contact with the chamber and large quantities of condensate were absorbed.

  Action

  • Observe installation instructions (see page 15, Set-up location requirements, of the Vacuklav 41B+ User Manual).
  • Check loading, observe instructions for loading (see page 20, Load the autoclave, of the Vacuklav 41B+ User Manual).

Possible Cause

Cool air intake openings in the base plate are covered, for example, by sucked in papers.

  Action

Remove objects (e.g. paper) from under the autoclave.

Event number 129

Possible Cause

  • Autoclave overloaded.
  • Defective power supply (under-dimensioned house connection for the outlet, defective outlet, numerous devices to one outlet or fuse).

  Action

  • Check power supply.
  • Check load (see page 20, Load the autoclave, of the Vacuklav 41B+ User Manual).

Event number 136

Possible Cause

  • Ambient temperature is too high.
  • Ventilating louvers covered, minimal edge spacing (5 cm) not maintained.
  • Door is permanently open.

  Action

  • Close the door.
  • Observe installation instructions (see page 15, Set-up location requirements, of the Vacuklav 41B+ User Manual).

Event number 175 or 176

Possible Cause

ACOUT1 main heating or ACOUT2 regular heating, electrical supply interrupted; FOY1+ FOY2 can occur in alternation.

  Action

  1. Turn off the power and press reset button overheating protection again.
  2. Acknowledge error message.
  3. Switch the autoclave off and then on again.
  4. Continue sterilisation or conduct an empty sterilisation. 

Event number 192

Possible Cause

Observation of successive rinsing procedure. Rinsing condition in the feed water storage tank should be produced.

  Action

Top up water storage tank with feed water or ensure water supply of the water treatment unit.

Event number 193

Possible Cause

Note subsequent draining requirements in the waste water tank must be prepared.

  Action

Completely empty the waste water tank.

Event number 231

Possible Cause

In the following situations, no CF card is plugged in:

CF card is selected in the Settings - Logging as the output medium and immediate output is activated or log output is started from the Log output menu. CF card is set as the output medium or the CF card must be formatted.

  Action

  • Plug CF card in card slot which is located to the right next to the control panel.
  • Insert the CF card in the card slot, with the palpable grip edge facing right.
  • If the card is correctly placed, a blue square lights up in the upper right corner of the display.
  • Change to the Log Output and from there save the desired logs on the CF card (see page 32, Subsequent output of stored logs, of the Vacuklav 41B+ User Manual).
  • Reformat the CF card. 

Event number 239

Possible Cause

Month directory on the CF card is full (more than about 100 logs).

  Action

At the computer, transfer logs from month directories into newly created directories. 

Event number 248

Possible Cause

Vacuum test at residual moisture in the chamber or with load.

  Action

Repeat vacuum test if autoclave is cold, dry and empty. 

Event number 351

Possible Cause

Two years have elapsed since the initial commissioning or since the last maintenance or 2000 sterilisation programmes have been completed.

  Action

Call our service team to make a maintenance appointment on 0800 028 4749: autoclave can continue to be used.

Event number 377

Possible Cause

Attempt to output log over the log printer, but no log printer is connected.

  Action

Connect the log printer as the output medium.

  • Plug the power supply (1) into the wall socket.
  • Connect the MELAG network adapter (3) with the supplied cable (2) to an Ethernet data connection point of the autoclave.
  • Plug the MELAG network adapter (3) into the serial connection of the log printer MELAprint®42 (can be screwed).
  • Plug cable (4) of the adapter (3) into the power supply socket of the log printer.
  • Switch on autoclave.
  • The printer is switched on when the power supply cable (1) is plugged into the power supply socket of the network adapter (3).
  • Set the log printer as the output medium in the autoclave (see page 38, Chapter 6 – Settings for the Vacuklav 41B+ User Manual).

Event number 386

Possible Cause

Internal memory of the autoclave for the logs of the completed programmes is almost full.

  Action

Read out the internal log memory on the storage medium of your choice with the Log Output menu (see page 32, Subsequent output of stored logs, of the Vacuklav 41B+ User Manual).

Event number 387

Possible Cause

Autoclave internal memory for the error logs is almost full.

  Action

Error logs are required by the technicians for maintenance and fault analysis. Read the internal error log memory to a storage medium of your choice with the Log Output menu. 

Event number 394

Possible Cause

In the menu Settings / Logging, immediate output is activated, and the CF card is activated as the output medium, but was previously not plugged in.

  Action

Press YES if you now would like to output the still not outputted logs to the CF card. 

Event number 395

Possible Cause

In the menu Settings / Logging, immediate output is activated, and the log printer is activated as the output medium, but was previously not connected.

  Action

Press YES if you now would like to print the logs still not printed out.

Event number 414

Possible Cause

With direct waste water connection: kinked effluent hose.

  Action

Check the effluent hose for kinks or pinching.


Possible Cause

Autoclave is overloaded.

  Action

Observe the maximum loads.


Possible Cause

The temperature surrounding the autoclave is too hot; the autoclave is obstructed and is getting no or too little cooling air.

  Action

Make sure there is sufficient air flow at the rear of the autoclave.


Possible Cause

The autoclave was operated without an insert frame. This resulted in the packages of textiles coming into direct contact with the chamber and absorbing a large amount of condensate; this condensate vaporises upon evacuation and forms a large amount of steam; cooling air ingress holes on the base plate are covered e.g. by paper.

  Action

Use insert frame; check for packaging residue in the chamber. 

Event number 428 or 439

Possible Cause

  • With direct waste water connection: kinked effluent hose.
  • Poor installation (multiple devices attached to a single siphon) sagging effluent hose.
  • Pressure release clips blocked by packaging residue.

  Action

  • Check the effluent hose for kinks or pinching.
  • Check for packaging residue in the chamber. 

Event number 433

Possible Cause

Maximum permissible difference between the theoretical temperature and that measured by temperature sensor 2 (AIN02=Display) is too large.

  Action

If the problem persists, call our service team on 0800 028 4749.

Event number 434

Possible Cause

Maximum admissible sterilisation temperature has been exceeded at temperature sensor 2 (AIN02=Display).

  Action

If the problem persists, call our service team on 0800 028 4749.

Event number 435

Possible Cause 

Minimum admissible sterilisation temperature not reached at temperature sensor 2 (AIN02=Display).

  Action

If the problem persists, call our service team on 0800 028 4749.

Bad drying results

Possible cause

Apart from a proper device function, the drying process depends on the correct setting up and loading of the autoclave.

  Action

  • Check the correct set up of the autoclave. If necessary increase the tilt by unscrewing the front feet of the unit of maximum 2 revolutions.
  • The floor of the vessel must be free. Where applicable, remove fallen instruments, filter paper, etc.
  • Pay attention to the correct loading of the autoclave. Do not overload. Make sure that textiles have no direct contact with the chamber wall and floor.
  • Use the Additional Drying function.

How often should you perform the helix test?

Once a day.

How often should you perform the ACT?

Once a day.

How often should you perform the vacuum test?

Once per week on a cold, empty chamber.

Do you need to drain the water from the autoclave at the end of each day?

Yes, no residual water must be left in the unit overnight. 

What instruments can you put through on the Quick S programme?

Hollow, solid and air retentive instruments can be put through on this cycle. 

Can the autoclave be linked to a drain?

Yes, this requires the purchase of a double chamber syphon and can be fitted by a Henry Schein Dental engineer. 

How often should you download the data logger?

This is down to the practice requirements, but typically many practices will download once per week. 

My autoclave has a data logger attached; do I still need to carry out the TST test?

Consult the manufacturer of your autoclave as they will inform you if this is required. HTM 01-05 states that this should still be completed. If you obtain no advice from the manufacturer then follow the HTM 01-05 guidance.

  • Have maintenance carried out by trained engineers only.
  • Comply with the predetermined maintenance intervals.

For retention of value and functional reliability

Regular maintenance is very important for the retention of value and the reliable operation of the autoclave. During maintenance, all functional and safety-relevant components and electrical facilities are checked and replaced if necessary. The maintenance is carried out according to the maintenance instructions which are relevant for this autoclave.

Maintenance intervals

Have the maintenance regularly carried out at intervals of 2 years or after 2000 programme cycles. At this point in time, the autoclave issues a maintenance reminder message.


Cleaning

Examine the chamber including the door seal, chamber sealing surface and the mounting for loading (see image below) once a week for contaminants, deposits or damage.

Image

If you find any contaminations, draw the existing trays or cassettes and the associated mounting forwards out of the chamber. Clean the contaminated parts.

When cleaning the chamber, the loading mounting, the chamber sealing surface and the door seal observe the following:

  • Switch the autoclave off before cleaning and pull the power plug from the wall socket.
  • Make sure that the chamber is not hot.
  • Use a soft and lint-free cloth. 
  • Use chlorine- and vinegar-free cleaning agents.
  • First drench the cloth with cleaning alcohol or methylated alcohol and try to wipe off the contamination.
  • In case of persistent soiling of the chamber, mounting or chamber sealing surface, use only a mild stainless steel cleaning agent with a pH value between 5 and 8.
  • Use neutral liquid cleaning agents to clean the door seal.
  • No cleaning agents may get into the piping system which exits the autoclave chamber.
  • Do not use any rough objects such as pot cleaners made of metal or steel brushes.

In case of non-observance the cleaned surface could become scratched or damaged and the sealing surfaces not tight. This would lead to dirt deposits and corrosion in the sterilisation chamber.

Housing parts

Clean the housing parts with neutral liquid cleaners or methylated alcohol.

Internal storage tank for feed water

If you use an internal water storage tank for feed water, check it for contaminants every time it is topped up.

Clean the water storage tank before refilling it with fresh feed water.

Clean the left side of the water storage tank (waste water) every two weeks.

Emptying the internal storage tank

Image

Empty the chambers of the internal storage tank as follows:

  • Pull forward the cover for the tank drain at the lower front of the device.
  • Attach the drain hose to the quick-fitting connection (drain tank on the left, feed water tank on the right) until it is well latched.
  • Drain the water into a receptacle with at least 5 litre capacity.
  • To remove the drain hose, pull the release button on the quick-fitting connection. The hose releases automatically.

Please observe the following when removing the quick-fitting connection:

  • When draining the storage chambers, stand to the side of the connection.
  • Be sure to hold the hose tight with the other hand while pressing on the grey release button of the quick-fitting connection in order to arrest the spring tension of the connection.

Avoid formation of spots

Formation of spots due to improperly cleaned instruments

Only if you correctly clean the instruments before sterilisation can you avoid the detachment of residues resulting from loading or instrument preparation under steam pressure during the sterilisation. Detached dirt residues (e.g. residues of disinfectants) can clog the filter, nozzles and valves of the autoclave and deposit as stains, spots or discolourations on the instruments and in the chamber (see page 19, Prepare items to be sterilised, in the Vacuklav 41B+ User Manual).

Formation of spots due to third-party rust

All steam-conducting parts of the autoclave are made of non-rusting materials. This excludes the formation of rust caused by the autoclave. Should rust stains occur you are dealing with third-party rust. If the instruments have been incorrectly prepared, rust can form even on stainless steel instruments. Often a single rust-producing instrument suffices for third-party rust to form on the other instruments or in the autoclave. Remove third-party rust from the instruments with a chlorine-free stainless steel cleaning agent or send the damaged instruments to the manufacturer for reconditioning.

Formation of spots due to inadequate quality of the feed water

The extent of the formation of spots on the instruments also depends on the quality of the feed water used for steam production.

Use qualitatively high-grade feed water

Observe the following when using feed water for steam sterilisation:

  • Use only demineralised or distilled water according to DIN EN 13060, Appendix C.

In case of non-observance, stains or damage on the instruments can arise and the function of the autoclave can be adversely affected.

Water according to VDE 0510

Distilled or demineralised water must have the VDE 0510 noted on the label of the packaging.

Feed water which you can inexpensively produce with the osmosis processes with MELAdem®40 or with the ions exchanger MELAdem®47 or by distillation with MELAdest®65, satisfies the requirements on the feed water.


Oil door spindle

Oil the door spindle at 2 month intervals as follows:

  • Clean the spindle with a lint-free cloth.
  • Apply two drops oil from the supplied oil bottle in the threaded brushing in the autoclave door.

You will find the instructions for oiling the door spindle on the inner surface of the autoclave door.

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