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.
View official manual on manufacturer's site ↗Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
Gas supply issues / Reduced or interrupted gas flow | Possible empty cylinder, closed valve, triggered crash sensor, incorrect switchover setting, or regulator icing. | — | Check there's gas in the cylinder and its valve is open, check the hose-rupture protection and the changeover settings, see whether the crash sensor has tripped, and make sure the appliances' quick-acting shut-off valves are open. | DIY Safe |
Crash sensor triggered (yellow button protruding) | Strong vibrations or an impact caused the crash sensor to trip and interrupt the gas flow. | — | Using the T20 Torx pin on the screw aid, push the yellow reset button into the housing, turn it gently clockwise and hold it there for 10 seconds until it locks in. | DIY Safe |
Regulator icing at temperatures around 0 °C | 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 |
Gas odor or leak detected | 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 |
Crash sensor in 'not ready for operation' position | 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 0.5 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 |
Crash sensor tripped / Out of operation | 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 |
Status indicator red (left bottle selected) | Pressure in the operating bottle dropped below 0.5 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. Its built-in crash sensor meets UN-ECE regulation 122 and shuts the gas off automatically in an accident, so you can legally run a gas heater on the move anywhere in Europe (subject to national rules).
Q: How do I reset the crash sensor?
Use the T20 Torx pin from the supplied screw aid to push the yellow reset button into the housing, turn it gently clockwise and hold it for 10 seconds so it stays locked in.
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: 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.