Hobby Motorhomes Owner's Handbook (2026)
Official technical documentation and workshop diagnostics for Hobby Motorhomes Owner's Handbook (2026).
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
N/A | Fresh water tank filling level is very low | The outer left LED on the bar will start to blink. | DIY Safe |
N/A | Habitation battery charging status is very low | The outer left LED on the bar will start to blink. | DIY Safe |
N/A | Lamp is set to the very lowest dimmed level and flickers Possible Cause: Technical reasons due to low dimming level | Increase the brightness of the light. | DIY Safe |
N/A | Levelling display values still indicate deviations even though the vehicle is in a horizontally level position | This can be corrected using 'Calibrate'. Confirm by clicking on 'Continue' to indicate that you wish to continue, select to which side the arrow is pointing, and confirm the entries via 'Calibrate'. | DIY Safe |
N/A | Not possible to connect to Bluetooth with a mobile device | Check the Bluetooth settings on your mobile device once again. | DIY Safe |
N/A | HobbyConnect App cannot be found in the store | Check the settings on the device; write HobbyConnect as one word and not two. Check the app settings in the respective country. | DIY Safe |
N/A | HobbyConnect app connection exists, but elements in the vehicle do not react to switching | Check the power supply; if necessary, disconnect it briefly. Contact your dealer. | DIY Check / Tech Fallback |
N/A | HobbyConnect Bluetooth connection does not work Possible Cause: Distance to the vehicle is too great or Bluetooth is not activated | Check the settings on your mobile device to ensure that Bluetooth has been activated. Ensure you are not too far from the vehicle. | DIY Safe |
N/A | Battery is not charged via the alternator | Check the following points: Is the 50A fuse in the supply line to the ancillary battery near the motor battery functioning properly? Is the 40A fuse in the supply line to the combined device OK? Is the “Motor running” signal on the input module on? Is the combined charger/charge booster SMP 439-10 active? | DIY Safe |
N/A | Loss of power in the battery sensor (voltage absent) | You must recalibrate. Manually calibrate the sensor by ensuring no electrical devices are switched on in 12V operation, opening the battery circuit breaker to switch off superstructure electronics, and letting the sensor calibrate itself for approx. three hours without being hooked up to the 230V mains. | DIY Safe |
N/A | Electric operation: 230V power supply interrupted while 12V supply is switched on (heating system) Possible Cause: 230V power supply interruption | An error code will be shown on the display. As soon as the 230V power supply has been reinstated, the heating system will automatically be restarted using the previous settings and the error code will disappear. | DIY Safe |
N/A | Mixed operation: Malfunction in the combustion process (e.g. lack of fuel) on Combi Gas heating system Possible Cause: Malfunction in the combustion process such as lack of fuel | The heating system will switch automatically to electric operation. If it is running in mixed operation, the cause of the malfunction must be eliminated. Use the control panel to switch the heating off and then on again. | DIY Safe |
W 42 H | Truma CP plus control panel warning message Possible Cause: One of the operating parameters has reached an undefined status | Use the adjusting knob/pushbutton to select the warning icon and press it to read out the current warning code. Use the error list to determine the cause of the warning and eliminate it. Then press the adjusting knob/pushbutton if the cause is eliminated to return, or press the 'reset' button if not eliminated. | DIY Safe |
E 112 H | Truma CP plus control panel malfunction | The control panel immediately goes to Malfunction mode and displays the error code. Press the adjusting knob/pushbutton if the cause is eliminated so the corresponding device restarts. Press the 'reset' button if the cause is not eliminated. | DIY Safe |
N/A | FrostControl safety/drain valve temperature is lower than approx. 3°C Possible Cause: Sub-zero or low ambient temperature below approx. 3°C | The push button will be ejected and the contents of the boiler will be drained off via the drain outlet automatically. | DIY Safe |
N/A | Refrigerator door can no longer be closed Possible Cause: The door handle on the open side of the door is blocked | Follow the device manufacturer's operating instructions to unblock the handle. | DIY Safe |
N/A | Gas cooker glass cover accidentally lowered during operation | The gas supply will automatically switch itself off. | DIY Safe |
N/A | Fat or hot oil catches fire while cooking | Do not douse the flames with water; instead, use a damp cloth or something similar to choke the flames and notify the fire department immediately. | DIY Safe |
N/A | Oven smells of gas | Immediately close the oven shutoff valve and the gas bottles. | DIY Safe |
N/A | Smoke detector warning signal beeps Possible Cause: Block battery needs changing | Carefully turn the cover of the smoke detector anti-clockwise until it can be removed from its mount. Take out the used block battery and unpin it from the pins. Connect the new block battery (type 9VDC 6F22) to the pins, ensuring that the pins click into place on the poles of the block battery. Place the battery in the smoke detector's battery container. Place the cover of the smoke detector so that the holes for the lock are over the locking pegs. Carefully turn the cover clockwise until it locks into the mount. | DIY Safe |
Frequently Asked Questions
Q: What should I do if I am not sure whether my motorhome is overloaded?
You should have it weighed at a public weighing facility. The maximum axle loads as well as the technically permissible overall mass entered in the vehicle's documents must not be exceeded.
Q: How do I activate all 12V and switched 230V electrical devices after initially connecting the vehicle to the 230V mains?
Press either the main switch or any other control key in order to activate all of the 12V electrical devices and those 230V electrical devices which are switched by the system.
Q: How do I activate the Bluetooth pairing mode on the control panel?
Press the Bluetooth key for approx. 2 seconds. A blue chase light will appear on the control panel, which goes off automatically after 2 minutes or when the Bluetooth connection has been established.
Q: How do I register and connect using the HobbyConnect app for the first time?
Install the HobbyConnect app on your device and start it. The first time you start the app, enter your e-mail address, first and last name, set up a password, activate the check box to confirm the General Terms and Conditions, and click 'Register'. Click on the confirmation link sent to your e-mail address to complete registration. Afterwards, click on the Login button under 'Do you already have an account?' to enter your login data, ensure Bluetooth is activated on both the mobile device and the touch control panel, and use the 'Bluetooth' button on the app's Start menu to connect.
Q: How do I empty the waste water tank?
The waste water opening is located on the left side underneath the vehicle, with the valve positioned in the gas-bottle container or directly by the opening. Unscrew lid j, open valve k, allow the waste water to run off completely, then push the slide valve back in and screw the cap back on. Never close lid j too tightly as it is slightly sucked into the opening.
Q: How do I prepare the toilet waste tank?
Open the toilet flap and pull the holding bar up to remove the waste tank, pulling it out as far as possible while keeping it level, then slightly tipping it out. Set the waste tank in an upright position, turn the spout to the top, open it, fill it with the correct amount of toilet fluids, and add enough water to completely cover the bottom of the tank (approx. 3 litres). Finally, shut the spout, turn it back to its original position, and slide the tank back into position until secured by the holding bar.
Q: How do I reset the Truma DuoControl CS crash sensor?
To reset, press firmly on the yellow reset button, turn it lightly in a clockwise direction, and hold for 10 seconds until it stays in the 'Ready' position. If unsuccessful, use the Torx T20 tool located by the screwing/unscrewing assist tool to turn it in a clockwise direction.
Q: How do I manually open the FrostControl valve to drain the water system?
Turn the rotary switch 180° until it locks into place. The pushbutton will pop out and the water in the water container will drain out via the drain pipe.
Q: How do I manually close the FrostControl valve?
Check whether the rotary switch has been set to 'Operation', i.e. parallel to the water supply, and has locked into place. Close the FrostControl by pressing the pushbutton until it locks into place in the 'Closed' position (note: valve temperature must be above approx. 7°C to close).
Q: How do I unlock the child lock on the Dometic compressor refrigerator TFT display?
Push the rotary button 3 times within 1.5 seconds to unlock the controls.
Q: How do I set the time on the Dometic CK 155 / CK 500 fume hood?
Switch the fume hood off. Press the On switch k for approx. four seconds to set the hour. Use the + and - keys l to set the hour. Briefly press the On switch k once to set the minutes. Use the + and - keys l to set the minutes. Then wait three seconds.
Q: How do I set the timer on the fume hood?
Switch the fume hood on. Press the light switch j and the - key simultaneously to set the timer. Use the + and - keys l to set the seconds. Press the On switch k for 3 seconds to set the minutes. Use the + and - keys l to set the minutes. Then wait three seconds.
Q: How do I test the smoke detector after changing the battery?
Press the test button for at least 4 seconds until the alarm goes off. The alarm goes off when the electronic system is working. It will stop as soon as you let go of the test button.