Truma Therme (TT2) Water Heater
The Truma Therme is a hot water heater designed for caravans, utilizing warm air from the heating system or a 230V electric heating element to heat up to 5 liters of water. It operates in a pressure-free system and features a thermostat-controlled heating limit of 65 °C.
Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
Device is not heating | No operating voltage | Restore power supply | DIY Safe |
Heating not working | No operating voltage. | Restore the power supply. | DIY Safe |
Operational Fault | Heater is calcified | Descale the water system (see maintenance) | DIY Safe |
Operational Fault | No operating voltage (Geen bedrijfsspanning) | Restore power supply (Stroomvoorziening herstellen) | DIY Safe |
Operational Fault | Scale buildup on the heating element | Descale water installation | DIY Safe |
Operational Fault | Heating element furred. | Descale water system (see maintenance). | DIY Safe |
Operational Fault | Heating element bent | Descale water system (refer to "Maintenance") | DIY Safe |
Operational Fault | Scaling on the heating element. | Descale the water system according to maintenance instructions. | DIY Safe |
Operational Fault | Scaling on the heating element. | Descale the water system (see Maintenance). | DIY Safe |
Frequently Asked Questions
Q: How do I drain the Truma Therme for winter storage?
Disconnect the water pump, open water valves in the kitchen/bathroom, and open the drain and vent valves completely to let the water empty out.
Q: Can the Truma Therme be operated without water?
No, the Therme must never be operated with electricity without water.
Q: What is the maximum operating pressure allowed for the Therme?
The Therme is designed for pressure-free operation. When connecting to a central water supply or stronger pumps, a pressure reducer preventing pressure from exceeding 1.2 bar must be used alongside a safety/drain valve.
Q: How should the Therme be filled with water?
Close the drain and vent valves completely by turning them, set the hot water tap to 'warm' (or the control knob to the red symbol in pre-mixing systems), and leave the tap open until all air is expelled from the Therme and water flows out of the taps.
Q: What should I do if there is a risk of frost?
Disconnect the power supply to the water pump, drain the water tank or remove the pump from the tank, open all water taps to 'warm', and open the drain and vent valves completely to empty the Therme entirely.
Q: What is the maximum operating pressure for the Therme?
The maximum operating pressure is 1.2 bar; only pumps without a non-return valve may be used, and a pressure regulator must be used in the case of central water supplies or stronger pumps.