Truma iNet X System – What you always wanted to know

We would like to inform you transparently about the new system solution and offer a platform for exchange as well as answer questions for the community in the long term.

You can find the basic product information at https://www.truma.com/int/en/products/inet-x-system

There will be two different panels, a retrofit solution for you as the end customer, the Truma iNet X Panel https://www.truma.com/int/en/products/inet-x-system/truma-inet-x-panel and the Truma iNet X Pro Panel, which will be installed in new vehicles directly by the vehicle manufacturer before delivery https://www.truma.com/int/en/products/inet-x-system/truma-inet-x-pro-panel

Both systems were presented at the Caravan Salon in Düsseldorf, so you have already been able to gather your first impressions.

The Truma iNet X retrofit panel will be available in stores in spring 2022.

The panels communicate at close range via Bluetooth. With our Truma iNet X App, you can therefore use the full scope (varies depending on the vehicle equipment). A far-field module, for communication outside the close range, will be introduced in the course of 2022.

If you have feature requests or ideas, then you can actively help shape the range of functions. To do so, please take part in our Open Innovation https://www.truma-inet-x-system.com/open-innovation.
Your wishes and ideas are collected centrally via this channel, evaluated and incorporated into the project.

If you simply have questions about the iNet X system, feel free to use the comment function on this blog post.

We look forward to exchanging ideas with you.

W255H in CP Plus display or no more symbols in display after reset

You see the warning message “W255H” on your CP plus display and cannot control your heating anymore?
This primarily indicates a connection problem between the CP plus and the heating. In this state, commands entered cannot be transmitted or cannot be transmitted correctly.

Attention!
A reset is not used to delete an error, but corresponds to an initialisation, i.e. a device search.
If the reset is carried out while there is a connection problem to the heating, the heating menu is completely lost. Only the time and the setup symbol remain.

Two factors can be considered as causes of the connection problem:

  1. 12 V power supply

Communication is only possible if the heater is powered in addition to the control unit. If this is not the case, the CP plus responds with the message W255H.
Please check the heating fuse in your electrical block as well as the fuse on the control board of the heating (Combi) or in the supply line (Varioheat). Replace a defective fuse if necessary.

Note: In our installation instructions, we recommend installing our units on permanent plus.
This means that the power supply to our units cannot be switched off by the central control element (main panel). There should be a permanent connection via the electrical block to the body battery.

  1. TIN connection cable

The TIN cable is used to transmit commands from the control panel to the heater. If this connection is interrupted, the CP plus responds with the message W255H.
Please check whether the plug of the TIN cable is correctly seated in the socket on both the control element and the control board of the heater.


As soon as the cause is eliminated, the warning message disappears automatically from the display.

Combi D – Tips for avoiding sooting

There are ways to protect the burner of the Combi Diesel from soiling and sooting.

In contrast to the Combi Gas, which burns almost residue-free, residues can form and settle on the Combi Diesel during use. This happens mainly in part-load operation.

Part-load operation means a permanently low power level that is mainly used to maintain the temperature.

The reason for the formation of residues is the low combustion chamber temperature that exists in 2kW operation. Unburnt fuel from diesel injection is then deposited as soot particles on the components of the combustion chamber.

The next time the engine is started, this residue burns off. You can see this by the smoke developing on the outside of the chimney. If the Combi D runs only at partial load over a long period of time, coking can occur on the components of the combustion chamber –> the heating system stops working.

This can be compared to the short-distance operation of a diesel car. If the engine does not heat up properly, this is also harmful in the long run.

Just as you drive a diesel car on the motorway to burn out the engine, with the Combi D it is also necessary to keep the combustion chamber active for a longer period.

You can achieve this by setting the Combi to 30°C in heating mode with the windows and doors open. In this mode, simply let it run for over an hour. The Combi then runs at maximum output. Due to the high temperature, any residues in the flame tube and in the combustion chamber are dissolved and burnt off.

Alternatively you can activate the hot water heating to Hot/60°C. As soon as you see on the control panel that the temperature has been reached, drain the hot water completely from the boiler. Cold water flows in and the heating system is forced to restart the burner immediately. Repeat this procedure until an hour has passed.

Tip: The water does not have to be poured away. Just collect it, let it cool down and then fill it back into the freshwater tank 😉

If the heater is only needed for a holiday trip of 2 weeks, please carry out the procedure at the end of the holiday. If the heater is used more or less often, simply adjust the interval accordingly.

iOS13 connection problems

Since the iOS13 release, connection problems between iPhone/iPad and the Truma iNet Box occur. In the meantime, we have been able to identify two different issues – but have not yet been able to solve the problems, even in cooperation with Apple support.

Here you can find a detailed error description and technical information about the causes of the problems. As soon as we have new findings, we will keep you up to date in the Truma service blog and in the App News.

Have you had experiences that you would like to share with other users and us? Then use the comment function in our service blog! We look forward to exchanging ideas with you.

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Truma Service over Christmas and New Year

Posted on 28. November 2019 by Monika Prandl

Service technicians on hand at six winter camp sites

Winter camping has its own special charm when it’s icy outside and snug and warm inside. But what if the heater breaks down? That would soon put an end to any holiday plans. But Truma makes sure that doesn’t happen. From 21 to 31 Dec. 2019 Truma service technicians will be on hand at six winter camp sites in Germany, Austria and Italy. Truma Service has a long tradition of being available over Christmas and New Year. “Our heating systems are very reliable,” says Service Manager Michael Suckart. “But just in case, our Service professionals are on hand so that our customers can enjoy carefree holidays.” As well as repairing appliances, the Truma experts give advice and answer questions about all our products.

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Important safety information

Replacement of the Truma gas outdoor socket and two gas valves

During the course of its quality assurance Truma has established that there may be leaks in the Truma gas outdoor socket and two gas removal valves. This only affects products with a yellow handle cap and the following codes below:

This can cause gas to leak uncontrollably from the affected products. In unfavourable circumstances this can lead to gas deflagration and injuries. We have not heard of such a case yet.

As a manufacturer of premium products, Truma attaches great importance to supplying reliable and safe products. The safety and well-being of our customers is our top priority which is why, to avoid any risk, we and our supplier have decided to replace all affected products. The probability that campers will encounter this fault is very low; nevertheless we would ask them to take the following precautions:

  • Ensure that the gas system is immediately turned off. To do this, close the cylinders and/or the gas tank or the external gas supply. If the external gas socket is connected to a separate shut-off valve (e.g. on the so-called valve block), you only need to close this shut-off valve.
  • If there is an awning, ensure good ventilation.
  • Check the code below the yellow handle cap (picture 1 below). To do this, you may have to turn the ring to read the code. Ensure that there are no ignition sources nearby during the inspection.
  • If your product has a code between …01.2016… and …01.2017…, please contact your dealer, a Truma Service Partner or the Truma Service Centre for a free replacement. The products may only be replaced by trained personnel; this process does not take very long. Do not use the gas system again or re-open the separate shut-off valve (e.g. on the so-called valve block) until the parts have been replaced!
  • If your product has a different code than those in the table above, the gas system is safe to use again.

 If you have any questions, please contact us

Truma Service Centre
E-Mail: service@truma.com

Telephone +49 (0)89 46 17- 20 20

Picture 1

What you can expect in our blog

Starting with general questions about the gas supply, advice about better distribution of the warm air through to advice on how to install products in your vehicle – the blog contains lots of issues related to accessories for your motorcaravan or caravan.

This also includes information about Truma in general or technical reports on day-to-day issues.

Do you have any questions about installing a product or would you like to propose an improvement to one of our products? Then don’t hesitate to leave a comment on the Truma service blog. We would be happy to hear from you.