Truma S 55 T LPG Caravan Space Heater
The Truma S 55 T is a liquefied petroleum gas (propane/butan) space heater designed for caravans and motorhomes, featuring combustion air intake under the floor and exhaust venting through the roof. It provides a heating output of up to 3 kW independently of electrical supply, which increases up to 5 kW when operated with the Trumavent 12V pressure blower.
Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
Operational Fault | Igniter battery is dead, improperly installed, or ignition spark is missing. | Check battery orientation, replace with a new heat-resistant (+70°C) Mignon battery (LR 6, AA, AM 3), and ensure connections to the automatic igniter are secure. | DIY Safe |
Operational Fault | Wind interference or snow accumulation around the roof cowl affecting combustion. | Clear snow from the cowl before ignition, ensure the cowl is unobstructed, and use the SKV chimney extension kit if necessary. | DIY Safe |
Operational Fault | Potential gas system leak. | Extinguish all open flames, do not smoke, switch off the appliance, close the gas cylinder valve, open windows and doors, do not operate electrical switches, and have the system checked by a professional. | Professional Intervention Required |
Operational Fault | Battery is depleted or dead | Replace the battery in the automatic ignitor with a new temperature-resistant (+70 C) Mignon battery (LR 6, AA, AM 3), ensuring correct polarity. | DIY Safe |
Operational Fault | Gas supply line may be filled with air, or gas supply is interrupted, or safety pilot has not engaged | Ensure gas cylinder and quick-acting valve are open. Hold the control knob down for up to 2 minutes if the line is air-filled until the flame lights. Wait at least 2 minutes before attempting to re-ignite after a failure. | DIY Safe |
Operational Fault | Wind interference at the roof cowl | Screw the SKV cowl extension kit onto the cowl shaft (must be removed before driving). | DIY Safe |
Frequently Asked Questions
Q: What should I do if the heater fails to ignite?
Wait at least 2 minutes before attempting a new ignition. Ensure the gas cylinder and quick-closing valves are open, the battery is functional, and hold down the rotary control knob for up to two minutes if the gas line contains air.
Q: Can the Truma S 55 T be operated while driving?
Yes, provided that national regulations permit it, the roof cowl remains completely free in the airflow (use an extension like AKV if necessary), and proper safety precautions for vehicles in motion are followed.
Q: How do I remove the heater casing?
Pull the top of the casing forward, push the side retaining springs outward and upward, tilt the casing forward, and adjust the angle so you do not need to disconnect the hot air blower or indicator lamp cables.