Truma DuoControl CS
The Truma DuoControl CS is a safety gas pressure regulator with an integrated crash sensor designed for two-cylinder gas systems in caravans and motor homes. It automatically switches between the operating and reserve gas cylinders and allows safe operation of gas appliances while driving across Europe.
Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
Operational Fault | Possible empty cylinder, closed valve, triggered crash sensor, incorrect switchover setting, or regulator icing. | Check fill level of the gas cylinder, ensure the cylinder valve is opened, check hose rupture protection, verify switchover system settings, check if the crash sensor triggered, and ensure quick-acting shut-off valves on appliances are open. | DIY Safe |
Operational Fault | Strong vibrations or an impact caused the crash sensor to trip and interrupt the gas flow. | Press the yellow reset button with the T20 Torx pin of the screw aid into the housing, gently turn in a clockwise direction, and hold for 10 seconds until it engages. | DIY Safe |
Operational Fault | Moisture or low temperatures have caused the regulator to freeze up, reducing or stopping gas supply. | Consider installing the optional Truma EisEx regulator heater for a trouble-free gas supply in low temperatures. | DIY Safe |
Operational Fault | Possible leak in the gas installation or cylinders. | Do not ignite any sources of electricity or flames. Close cylinder valves immediately, have the system repaired by a specialist technician, and do not reopen cylinder valves until repaired. | Professional Intervention Required |
Operational Fault | Crash sensor has tripped or was manually set to non-operational. | Firmly press the yellow reset button, turn it slightly clockwise, and hold for 10 seconds until it stays in the 'ready for operation' position. | DIY Safe |
State indicator shows red | Gas is being drawn from the reserve (right) cylinder because the service cylinder pressure has dropped below 0.4 bar. | Check the connection to the left cylinder and verify its gas level; replace or refill the empty cylinder. | DIY Safe |
Gas odor / Leaks | Possible leak in the gas installation. | Do not switch on electrical devices or ignition sources. Close gas cylinder valves immediately, do not open valves in the meantime, and have the gas system repaired by experts. | Professional Intervention Required |
Operational Fault | The crash sensor has triggered due to an impact/deceleration or is in the 'out of operation' position. | Press the yellow reset button firmly, turn it slightly clockwise, hold for 10 seconds, and ensure it remains in the 'ready' position (use Torx T20 on the auxiliary mounting tool if necessary). | DIY Safe |
Operational Fault | Pressure in the operating bottle dropped below 0.4 bar, or gas is being drawn from the right (reserve) bottle. | Check the connection to the left bottle and its fill level. | DIY Safe |
Frequently Asked Questions
Q: Can I operate my heating system while driving?
Yes. The integrated crash sensor complies with UN-ECE regulation 122 and automatically stops the gas supply in the event of an accident, permitting legal operation of liquid gas heaters while driving throughout Europe (observing national rules).
Q: How do I reset the crash sensor?
Press the yellow reset button into the housing using the T20 Torx pin of the included screw aid, gently turn it clockwise, and hold it for 10 seconds to ensure it stays engaged.
Q: How do I know if the operating gas cylinder is empty?
The switchover system indicates cylinder status via red and green windows referring to the operating cylinder. A green display means the operating cylinder is full, while a red display means it is empty and the system has switched to the reserve cylinder.
Q: Can I operate my gas heating while driving?
Yes, provided the vehicle is equipped with a properly designed gas installation and an approved safety shut-off device like the DuoControl CS, complying with European and national regulations.
Q: What should I do if the crash sensor fails to reset?
Use the Torx T20 key located inside the screw tool to gently facilitate rotation in a clockwise direction while pressing the yellow reset button.
Q: Can the DuoControl CS be operated with only one gas cylinder?
Yes, the system can operate with a single cylinder. The unused inlet must be closed using the provided brass blind cap, and the rotary knob must be turned toward the active service bottle.