Frequently asked questions from our customers

Filter and extraction systems deal with a topic that is important for everyone, but can also cause confusion. Therefore, we have created a list of the most frequently asked questions exclusively for you. If your question is not part of this list, please let us know by sending us a message using our contact form.

Extracting viruses such as Corona, bacteria and aerosols

In addition to the filter performance, the most important thing for the efficiency of an extraction system is correct capturing at the point of origin. If it is too far from the source of aerosol formation, a high degree of separation will not help either. This process is comparable to a sieve that can only filter what goes through and not what passes it. It makes no difference whether a UV-C light lamp or another antimicrobial device is used additionally to extraction. TBH filter and extraction systems have a H13 filter that captures 99.95% of the hard-to-separate particles in the spectrum 0.1µm - 0.3µm, as well as 100% of larger and smaller particles. Therefore, they already offer the best possible protection - not only against particles but also against viruses and bacteria.

UV-C light lamps in addition to extraction systems with TBH filters are not necessary. Correct capturing is crucial for efficient extraction.

U15 filters (degree of separation 99.9995) have a 3-time pressure loss compared to H13 filters (degree of separation 99.95), which leads to a weaker extraction capacity of the system. Much more important than two decimal places in the degree of separation is to capture the aerosols / particles at the point of origin, for which an appropriate extraction power is required. A H13 filter guarantees more safety and efficiency against viruses, bacteria and aerosols over a longer time than a U15 filter.

The extraction arms can be easily disassembled and then placed in a tub with disinfectant cleaning solution (observe the manufacturer's instructions). After a short exposure time, clean the arms with a nylon brush and then disinfect them (scrub disinfectant).

Watch our video of how to clean the extraction arm. 

The system is delivered ready for use. After installing the extraction arm, the system is ready for operation.

Yes, we have prapared a flyer for you. This TBH Corona protection PDF contains all information shown on this site. 

Yes, because according to the current state of knowledge the coronavirus has a size of max. 20-160nm and is therefore larger than laser particles (>=10nm), for which our systems are currently mainly used. TBH filter and extraction systems can effectively extract coronaviruses and filter them out of the air. This prevents the viruses from spreading through the air and settling on surfaces through which people can be indirectly infected with the SARS-CoV-2 virus.

Filter service lives are very dependent on the application and therefore, cannot be predicted generally.

Normally, the change takes place according to the filter status display on the system.

In medicine / dental / aesthetics applications, the filters have to be changed at least every ½-year due to the bacteria / nucleation. We recommend, regardless of the filter status display, the following filter change intervals:


Replace pre filter mat
Replace main filter


The exchange takes place regardless of the filter status display for the following reasons:

Possible contamination of filter with viruses and the growth of fungi and bacteria on the surface. Biological contamination cannot be monitored via the filter display.

Saturation of the activated carbon with process gases and their aging (even with a low pollutant content). This cannot be monitored via the filter display.

The InLine filter has to be changed and disposed after each use.

When changing filters, do that in a separate room, wearing adequate PPE. Use a disposable pad when changing the filter. Put the used filter into the airtight transparent bag, which is included in the system`s delivery, and seal it.

H13 filters from TBH are tested in accordance with DIN EN 1822 and therefore offer safe quality. They filter 99.95% of all harmful particles (0.1-0.3µm), including coronaviruses. In comparison, a mask of class FFP3, in accordance with DIN EN 149, only retains 98% * of these particles (0.6µm). The DGUV recommends using an extraction for personal protection before wearing suitable protective equipment. H13 filters offer sufficient protection. They have lower pressure loss,  compared to the H14 filter, and thus a better energy balance as well as a longer service life.

*Quelle: Berner Safety

TBH filter and extraction systems are not a medical device in accordance with §3 Art. 1 of the MPG (German Medical Products Law), because the systems do not come in contact with the patient. The systems extract the particles safely from the ambient air and serve primarily the occupational safety than patient’s safety. The systems have no therapeutically use. Therefore, they do not need a medical approval according to the European standard DIN EN 60601-1.

Yes. The 99.95% separation efficiency in H13 filters relates to particles of the "most penetrating particle size" (short MPPS, or in German "most penetrating particle size"). These are particles, sizes between 0.1-0.3 µm, represent, the so-called “worst case” for the filter's separation efficiency. Particles that are outside this spectrum, i.e. larger or smaller, are 100% captured by the filters due to various physical effects (according to EN1822).

Activities should preferably be relocated outdoors to protect against potential infection with the coronavirus. Particles can spread further and faster outside than in closed rooms. The virus is very temperature resistant, i.e. it survives at refrigerator temperatures of 4-7° C as well as at midsummer’s 30° C and more. Even at such high temperatures, the virus remains infectious for a long time on surfaces. High humidity allows the coronavirus to spread more, while low humidity slows it down, i.e. when it evaporates, it becomes smaller very quickly. Within the first hour, drought reduces the infectivity of the viruses by 100 times. It then slowly continues to drop, regardless of the temperature. UV light destroys the coronavirus as well.

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Various manufacturing processes create many hazardous substances, which can be dangerous to human beings. Soldering fumes and laser emissions are two examples. Due to their small sizes, the particles penetrate deeply into the bloodstream and can cause serious diseases. Filter and extraction systems protect you from these hazardous substances by sucking them in. They remain in the filter so they can no longer be inhaled. These particles would also attach to the machines, potentially blocking some mechanisms within them. Hence, the contaminated air does not remain that way or spread more and harm other people, a TBH filter and extraction system protects the environment as well. It is a triple protection in one system - for people, the environment and the machine.

TBH filter and extraction systems capture contaminated air and lead it through the filter elements, which are suitable to your working process. Dusts, smokes and gases release harmful particles, which the systems’ various filters, like main filter, HEPA filter and activated carbon, extracts. Afterwards the system leads the cleaned air back into the room or to the exterior.

Generally, all particles and particle sizes can be sucked in by a TBH filter and extraction system. The user of the system has to observe directives, laws, guidelines and technical rules like explosion protection, dangerous particles, health protection, etc., which are valid in the respective countries.

There is a vast collection of extraction arms, hoses, pipe form divider, adapter, plug, security elements, etc., which you can find in our accessory catalogue. Our sales team advises you on your individual solution.

Yes. Due to our modular design, our powerful INSPIRE control electronics und our diverse accessory articles, we can adapt our systems individually to meet your requirements fully.

There is no problem to put our systems into control cabinets, cabinet bases or cases. TBH systems are all equipped with the INSPIRE control electronic, which comes with a powerful digital and manual automation interface.

That depends on the respective system and its requirements. Please read the conformity declaration in the operating and maintenance instructions of your system.

TBH only uses high-quality blowers from famous market leaders. Almost all systems these days are equipped with a brushless electronic commuted engine, which can operate several thousand hours and allows a high efficiency and power. The runtime of these blowers are depending on several aspects. Examples for that are the power, with which the systems operate the number of start and stop processes, and the surrounding requirements. Due to this reason, it is not possible to make a general statement.

The process air will be led back into the room generally, or can be led to the exterior in especially severe processes with hazardous materials. The advantage of recirculated process air is that it is heated during filtration, i.e. when going through the filter and extraction system. This can save heating costs. 

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Generally, the systems are fully assembled and safely packed, partly delivered on pallets. After connecting the system to power, it is immediately ready to operate. The assembly is made tool-less due to the modular design. Tools could be required for accessory items such as extraction arms, which are assembled afterwards. When requested, we can offer the assembly as part of our services.

We generally dispatch our compact systems of the LN, GL and BF series, including our standard accessories, within 14 days. We usually dispatch larger systems, like the LN 600 or FP 200, within five to six weeks.

The TBH guarantee varies, depending on the system, between 5,000 and 10,000 operating hours, or two years after delivery date, depending which of these happens earlier.  Our guarantee normally excludes a user-related liability and consequential damages. This is not the case when we have approved the project-related requirements.

In general operation, the only costs for a filter and extraction system are when buying a replacement filter, the power usage, disposal of the filter and pressure air usage (only with systems of the FP series). The amount of the costs depends on the size of the system, the aiming process and the system’s settings.

A coal engine is an inexpensive universal engine like you might know from your drill or vacuum cleaner. The power for the engine movement is lead through two contacts using coal brushes to the rotor. These brushes wear off by the time.

A permanent engine does not need any coal brushes. Other kinds of permanent engines are electronic commuted engines, short EC engines. These differ strongly in the construction from other engine kinds. They mostly have powerful neodymium magnets at the rotor, and generate their rotating field by using several windings, which are controlled by a control electronic one by one via a PWM modulation. The results are higher rotating speeds, power densities, and efficiency compared to universal engines and inducted ones. TBH almost completely uses powerful and efficient EC engines.

Further kinds of permanent engines are induction engines for 400 V turn power, which are used in the industry. Due to the rotating field, which contactless induced power by wrapping around a package of metal sheet of the rotor. Due to that, a turning moment is created and the engine runs. This kind of engine can be used with the help of an additional condenser even with 230 V.

The free-blowing air volume stream indicates how much air power can be generated by the engine unit or the blower, when there is no opposite pressure (resistors in form of filters or hoses), that are put on suck in and out settings. When placing the filter units into the system afterwards, the working point of the blower is changing to a lower resistor. It has to generate a higher pressure to overcome the resistors. The effective air volume stream sets in. It can differ, depending on the filter equipment. Particle and pre filter generate a low loss of pressure, which increases by time because of natural saturation. The activated carbon filter has a high-pressure loss but it does not continue increasing. When adding additional elements like hoses or extraction arms, especially when they are too small, the pressure losses continue increasing and the actual air volume stream is smaller than the free blowing or the effective one.

We are generally in favor to council our customers as best as possible and support you by giving optimal advice to your buying decision. This includes, depending on the system’s size, live performances, and special conditions formajor projects, product videos and much more. Please keep in mind that larger systems like the LN 600 and FP 200 series are not available for live performances or as testing systems.

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No. TBH stands for high customer service and individual advising by our qualified and motivated sales team, who is by your side in each phase of your process as a competent partner.

Filter and extraction systems on modern precisely processes ensure the quality of your products and protect your employees and machines from harmful emissions. We suggest maintaining the systems at least once a year by our TBH service team that your filter and extraction system can work as best as possible.

Generally, the user has to figure out which dangerous particles are in the air. Normally, when there are no harmful process emissions, we recommend letting the air back into the room. Additionally, there are European guidelines and rules for harmful particles and ATEX, which are also valid when it comes to filter and extraction systems like CMR substances. Users of filter and extraction systems have to observe these regulations, and they have to let the air out of the room, when the used substances are marked as CMR, like chrome steel. There are exceptions for mobile systems, when leading to the exterior is in no economical acceptable relation. In that case, it is to observe that the used systems have an approved refinement degree according to a valid regulation like 60335-2-69 AA, 15012-1. 

TBH offers a wide range of "W3" conformity systems. Please contact our sales department for more information. 

Our sales team is your first contact person in everything regarding the TBH services, from counseling to executing our services. Please call or send an email to our sales staff in case of enquiries for maintenances. They will manage the planning and coordination.

In case of errors with the system, which you bought at one of our partners, please contact our partner first. Customers, as well as partners and distributers, which bought directly at TBH, please contact the responsible sales person. 

You can have a look at it for example in the Gestis substances database of the IFA and your CMR list.

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The modular design allows us to develop a suitable solution for you very flexibly, and to react to changing requirements very quickly. The system contains several units, which can be assembled individually. This leads to shortened production cycles and a more vast diversity of systems.

The TBH Inspire interface is one of the most extensive interfaces with which you can integrate your TBH system into your process. It has analog and digital signal inputs and outputs. Filter saturated, start-stop, start of filter cleaning, collecting error signals and many other functions are integrated in the TBH Inspire interface. In addition, the Inspire interface can be controlled via a digital RS232. In addition to all analog signals, you have the additional options of parameterizing the system or reading the message memory. The functional scope of the TBH Inspire interface varies depending on the type of system. Find out more on our website or contact us.

There is the basic question arising which access do you have to your controller/laser system and which functions do you need.

Purchased system (e.g., laser marking station):

Please contact the manufacturer of the system and ask which interface functions of a connected filter and extraction system can be used. As a rule, functions such as "Start / Stop" and "Filter saturated" messages are used. The connection diagram of the filter and extraction system can be found in our operating and maintenance instructions.

Own control:

If you have your own control, you can choose between an analog and a digital control. Functions such as "start / stop", "filter saturated" or "collective error" messages are mostly used analogously. If the controller has more options for data processing, the RS232 interface is able to evaluate digital data such as filter conditions, temperatures, etc. Our operating and maintenance instructions show the connection diagram of the filter and extraction system. We will gladly send you the data commands for the RS232 interface.

No control available:

If no controller is available and you still want to use the functions of the interface, you can choose between a footswitch ("Start / Stop" function) and a wired remote control ("Start / Stop" and "Filter saturated" message) in our accessories.

The German Ordinance on Industrial Safety and Health (short: BetrSichV) and internal regulations must always be observed. In addition, technical rules (TRGS) and other regulations apply, depending on the industry and the substances extracted. The operator of a filter and extraction system is legally obliged to inform accordingly, to assess his workplace and to ensure safe operation. Contact your internal security officer or ask a respective person at the responsible Employer’s Liability Insurance Association for further support.  

Initially, please read the operating and maintenance instructions as well as the internal safety instructions. In addition to general installation and commissioning, please check the tightness of the piping to the extraction process and the suction power at the extraction point. Upon request, we can offer assembly and commissioning as a TBH service.

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Filter change/Filter saturation

The most secure indicator on a saturated filter is by measuring the differential pressure. A visual control of the filter can often be misleading. Especially modern laser processes create many harmful particles, which have the size of only a few micrometers. This can cause filter to appear new when they are actually saturated. A light test is an indicator. Hold the filter against a homogenous light source like a window, and have a look inside one fold. When light comes through the bottom of the fold, the filter is probably relatively new. When no light comes through the bottom of the filter, it is probably saturated. Please observe the information about safety equipment in the operating and maintenance instructions. 

All TBH systems are equipped with a powerful electronic, which has a differential pressure control for every filter. This prevents an overly fast saturation or break of the filter. When the filter approaches the saturation pressure, the electronic control visually signalizes this on the display. When the filter reaches the maximum saturation pressure, the system signalizes a visual and acoustic error and stops the extraction.

The filter change can be done, except for a few exceptions, tool-less by lifting the top unit of the system or its front door.

When disposing of the extraction and filter system and the extraction equipment, it must be observed that the entire filter equipment is hazardous waste, which must be disposed of in accordance with local regulations. Depending on the contamination in the system and the extraction elements themselves, these must also be disposed of as hazardous waste.

Please get more information from your local disposing company, on the respective disposing guidelines and the correct disposal.

Every TBH filter elements and systems are especially built to fit perfectly onto each other, and will optimize the filter runtime depending on each process. The capturing and emission rate can vary drastically, and therefore we cannot make a general statement.

The user can detect the level of saturation of the activated carbon by using a specific sensor (have a look at question number six), or by creating odor, that runs through the activated carbon. The odor does not automatically indicate that harmful particles from the process are saturated in the activated carbon. Different substances cannot be absorbed equally well. In a process, gas flow can be various substances and aromatases. This leads that activated carbon soaks in undesired solvents, but aromatase runs through. The activated carbon’s ability to absorb gets less when temperatures are highly above 30 ° C or absorbed substances leave again.

Hydrocarbon, alkenes, toluol, odors and much more occur in various processes as gaseous substances. They are created for example in gluing, cleaning or laser processes. Only in thermic laser processes hundred gaseous substances can form. A wide-range sensor would be needed to observe the activated carbon, because only this sensor can detect even the smallest of these gases. There are sensors on the base of interferometric and the steaming of substances on a heated surface, so called VOC sensors. These can be used with a very wide-range when hydrocarbon is leaving. A disadvantage is, that they are very imprecise and detect only when the work place limits are surpassed, or the air volume stream of the filter and extraction system reduces the gas stream strongly. In both cases, a high odor or contaminated concentration can be created in the working space.

A precise possibility of the gas stream detection offers the interferometric to examine the light reflecting spectrum of the gas stream. Each gaseous particle creates a visible, significant light spectrum to identify the substance. Even the smallest amounts of gaseous particles are visible and the functions of the activated carbon can be checked. Unfortunately, this procedure is very expensive. Such sensors, with an evaluation feature, can cost a four-digit prize. Furthermore, most of them are reduced to only one substance. This means, that each substance in a process gas stream, which is supposed to be collected by the activated carbon, needs one individual sensor. Even with this kind, there are sensors, which can analyze a wide-range spectrum. This is mostly so reduced, that several sensors had to be used continuously to observe a single gas stream.

We are happy to advise you individually in your process and talk about any economically sensible options with you. However, the requirements for an assessment always include the availability of safety data sheets of the extracted substances, quantities and ambient conditions. 

The fill of the activated carbon absorbs many different dangerous and odor-creating substances during its lifetime. Exchanging the fill carries out these particles and whirls them around. This creates a highly concentrated cloud of activated carbon dust and gaseous, which contains all the substances from which you wanted to protect your employees and coworkers.

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Company related

Heinrich-Hertz-Straße 8 in 75334 Straubenhardt, Germany

TBH is operating internationally and delivers in virtually all countries around the globe - certainly to you as well.

There has a subsidiary in the North America. In other countries, TBH operates either directly or with partners. Further information are on our contact page.  

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ESD stands for electrostatic discharge. It is about actions to prevent human beings, buildings and systems from electrostatic charges and from carrying that to sensitive products, which would destroy them. In the electronic industry, ESD is especially relevant. You can get more details on our ESD page.

All TBH filter and extraction systems are made of high-quality sheet steel and are therefore conductive. For this reason, all TBH systems are classified in protection class I for electrical equipment. Devices of protection class I are always grounded with low resistance. TBH ESD such as extraction arms, suction hoods and hoses are available as ESD variations and allow the suction power to be transported to where you need it. All parts of the TBH ESD accessories meet the requirements of modern and sensitive ESD areas.

ATEX is a widely spread synonym for the ATEX directives by the European Union. The term ATEX comes from the French abbreviation of ATmosphères EXplosibles. The directive currently contains two guidelines in the field of explosion protection. These are the ATEX product guideline 2014/34/EU and the ATEX company guideline 1999/92/EG. You can read detailed information about that on our worth-knowing page.

TBH's FP150 and FP200 ATEX series offer equipment suitable for extracting in zone 21. ATEX label: EX II 2 /-Dc IIIC T100 ° C, ATEX directive 2014/34 / EU.

TBH's DT150 series offers equipment suitable for extracting in zone 22 (dust) and zone 2 (gas). ATEX label: EX II 3GD (Gc / Dc) EX IIA T4 / IIIB T120 ° C, ATEX directive 2014/34 / EU.

Dangerous dusts create, because of their characteristics, a danger for human beings or the environment. These characteristics could be, for example, inflammability or toxicity. Even substances, which are not hazardous or toxic in solid form, can have dangerous characteristics. They develop them as soon as they are in a form of dust. One example is metal dust.

A substance gets explosive when it is present in the “correct” mixture of dust and oxygen (depending on material characteristics). This means that the mixture is between the lower and upper explosion limit. The energy, which is necessary for igniting the explosive mixture, also depends on the material characteristics of the substance. General preventive measures are therefore always to prevent an explosive mixture and a spark.

PM1 describes a particle size up to 1µm in the exterior air. These are called fine dust particles. They are especially important according to the preservation of health, because they are 99.99% of the air composition. PM1 particles can penetrate deeply into the lung and lead to inflammable reactions. Modern manufacturing processes emit a wide range and vast amount of PM1 particles with a size below 0.1µm. These sizes are so small that they can even enter the bloodstream. Further information are on our "Things to know" page. 

Saturating filters are to be replaced after reaching full saturation. Cartridge filters have a pneumatic filter cleaning. This automatically cleans them due to impulses of pressed air, when the filter reaches the saturation. This increases the runtime drastically.

Machining processes with lasers are often assigned to related processes mentioned in the welding fume guideline DIN EN ISO 15012 or DIN EN ISO 21904 (e.g. laser processes with metals). For these processes, the guideline requires a "W3" approval regarding the occupational health and safety when the air has to be led back to the work area. The Institute for Occupational Safety IFA confirmed this "W3" or also DGUV approval for TBH filter and extraction systems. The systems are listed there in the so-called positive list and are thus suitable even for the extraction of carcinogenic substances. 

The guideline's change from DIN EN ISO 15012-1/-4 to DIN EN ISO 21904-1/-2, which has been valid since 2020, has not changed this. As the test standards and requirements have not changed as well, the IFA officially confirms that the TBH test reports will remain valid until 30.06.2024 and will only then be rewritten to the new guideline.

The degree of separation of a filter or an extraction system generally describes how much percentage of a particular particle sizes are held back. The degree of separation H13 means that 95.95% of all particles in a size of 0.1-0.3µm are held back. The test is a defined procedure using a specified test dust. It is a standard throughout Europe. Certainly, particles of other particle sizes remain reliably in the filter.

Generally, the precoating is used for filter cartridges with an automatic filter cleaning. By applying a Precoat liquid (separation liquid), which prevents wet and sticky dusts from remaining too tightly on the filter cartridge. It is like flour, which prevents the rolled out dough from sticking to the working surface.

The particle concentration can be measured with special sensors and measuring instruments for the particle sizes of the fraction PM 1 to PM 0.1. When the particle concentrations are below 1μm, the requirements placed on the measuring instruments and the measuring environment are very high. Such measurements usually have to be carried out in appropriate clean rooms. Otherwise, the measuring devices would already respond to the ambient air or they would have been inoperative after only a few seconds.

The ideal detection of harmful particles depends on the process and the working surface. The goal is always to remove as many particles as possible. For smooth surfaces, the airflow should slide over as much of the surface as possible to trap most particles. The selective detection directly at the point of origin is optimal if the distance of the detection element is equal to or smaller than the pipe or tube diameter. Inlet openings for supply air are always to be mounted opposite the detection element so that it leads the pollutants directly into the extraction system. The hose should be as short as possible and long as necessary. If it were rolled up or looped, the pressure drops increase to effectively transport the pollutants into the system. In this case, particles could stick in the hose.

It is every employer’s liability to protect the employees from any health hazards, which arise during their work processes. Certain limits apply at the workplace to ensure the worker’s safety, especially concerning dust emissions. The DIN EN ISO 11690 defines safety guidelines. A noise level in industrial workplaces may not exceed 80 dbA. Wearing a hearing protection is mandatory when the noise level is above 85 dbA otherwise the ear-ways of the workers are long-term damaged. A sound dosimeter measures the noise level directly at the ear of the worker. This is the spot where he perceives the sounds that cause possible damage. Information on the risk assessment and measurement are accessible in the "Ordinance on the Protection of Employees from the Dangers of Noise or Vibration" and the "Ordinance for Occupational Health Prevention".

According to the Machinery Directive (MRL) and the DIN EN ISO 3746, machine manufacturers must measure the sound pressure level in individual operation. The sound level can vary when other systems are operating in the same room or hall as well. A difference of up to 10dbA is thus possible, which, however, some people perceive as twice as loud. As each work place is different, the actual value varies depending on the operator. Every worker in a hall perceives all sounds in it differently. Considerable factors are the size of the hall and other sources of noise. Thus, the sound level of a system in the room combined with other devices is always higher than the level specified by the manufacturer.

The direct sound radiation may never be directed towards the worker. Protective walls and ceilings dampen the sound.

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Quick diagnosis TBH extraction systems


Error description




System does not start, no working display

Power cord not plugged in

Plug in power cord

Fuses not inserted or defect

Check fuses and change if required

No voltage in the used socket

Check fuses

Power switch is off

Switch on the system

False voltage

Check the voltage

Three-phase supply without neutral conductor

Check the power connection


System does not start, audible warning signal, fault turbine shines

Turbine breakdown / fault

Switch off the system and contact the manufacturer or your country representative

Filter saturation display shines (green + yellow + red)

Filter is fully saturated

Deciding which filter need to be changed by using the filter status display (depending on the kind of system) and afterwards reorder a replacement filter.

Temperature fault shines

Temperature issue

Switch off and let the system cool down. Check the ambient temperature and extraction hose (blocked, length/transverse section), restart the system, contact the manufacturer or the country representative in case of reoccurring of the error


System does not start, Button  Run/ Standby flashes

System is on standby

Press the button Run/Standby

Interface falsely wired


Attention! Interface is partly only optionally available.

Check interface

Pin 7 = +

Pin 8 = -

The remote control is dominant when bypassing between Pin 9 and Pin 10, switch the system to Run with the remote control


System runs, yellow warning signal flushes, filter saturation display shines (green + yellow)

Filter party saturated (depending on kind of system, the relevant filter will additionally be shown yellow)

Green area –
Filter saturation O.K. Yellow area  –
reorder replacement filter

Red area – Filter fully saturated  - exchange


Rotational speed of the system cannot be changed

Connected remote control, rotation speed regulation from external (Pin 14,15)


Attention! Interface partly only optional available.

Rotation speed regulation from external is dominant before the manual set rotation speed on the system


Rotation speed cannot be changed by the interface

Setting of the rotation speed of the system is dominant


Attention! Interface partly only optional available.

Rotation speed regulation from extern is dominant before the manual set rotation speed on the system


No / low suction power, filter saturation display shows no filter change

Blocked suction pipe, defect, broken or not correctly attached

Clean or change suction pipe



No correct setting of the suction power

Increase suction power by using the rotation wheel (front) or the remote control



Engine / Control is defect

Contact your country representative


System runs noisily or is vibrating strongly

Engine mount is defect

Change engine or contact your country representative



Pollutants on the impeller of the engine

Check filter for leaks and contact your country representative if necessary

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