Truma Electric Boiler (230V)
The Truma Boiler Elektro is an electric hot water generator designed for caravans and motorhomes, using a 230 V, 850 W electric heating element. It automatically limits water temperature to approx. 70 °C and includes built-in overtemperature protection and a safety/drain valve.
Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
Water not getting hot | No operating voltage or operation without water causing the overtemperature protection to switch off the heating element. | Restore power supply, or switch off, wait for 10 minutes, fill with water, and switch on. | DIY Safe |
Extremely long heating time | The water container is furred with limescale. | Descale the water system. | DIY Safe |
Operational Fault | The safety/drain valve is open. | Close the safety/drain valve. | DIY Safe |
Operational Fault | Drainage socket closed, venting hose closed off, or elbow fitting twisted at the boiler. | Check opening for soiling (slush, ice, leaves), check hose for kinks, and ensure the aeration valve on the elbow fitting faces to the side. | DIY Safe |
Operational Fault | Water pressure is too high. | Check pump pressure (max. 2.8 bar). Use a pressure reducer if connected to a central water supply. | DIY Safe |
Operational Fault | Water pressure is too high. | Check pump pressure (max 2.8 bar); if connected to a central water supply system, a pressure reducer must be used to prevent pressure higher than 2.8 bar. | DIY Safe |
Operational Fault | No operating voltage or lack of water operation causes the thermal protection system to cut off the heating element power. | Restore power supply; if caused by lack of water operation, disconnect power, wait 10 minutes, fill with water, and then reconnect power. | DIY Safe |
Operational Fault | The water tank is scaled up. | Descale the water system (see maintenance). | DIY Safe |
Operational Fault | Safety/drain valve is open. | Close the safety/drain valve. | DIY Safe |
Frequently Asked Questions
Q: What should I do if there is a risk of frost?
Drain the boiler completely by opening the safety/drain valve (lever vertical, position b) and opening all hot water taps. Disconnect power to the water pump.
Q: Can the water temperature be preselected?
No, the water temperature cannot be preselected; there is an automatic temperature limit at approx. 70 °C.
Q: What pressure reducer is needed when connecting to a central water supply?
A pressure reducer must be used to prevent pressures higher than 2.8 bar from occurring in the boiler.
Q: What needs to be noted before initial use?
Before initial use, make sure the entire water supply system is completely filled with water. The water heater should be drained when not in use to avoid the risk of frost.
Q: Can the water temperature be pre-set?
No, the water temperature cannot be pre-set; the automatic temperature limit is approximately 70 °C.
Q: If the over-temperature safety system is triggered and cuts off the power, how to reset it?
You must wait until the device temperature drops below 24 °C, then switch the switch back to "Off" and then to "On" to reset.