Question 1

Error The LED flashes for roughly 10 seconds after switching on, then switches off: System switches off automatically and cannot establish a radio link to the controller

Accepted Answer

Possible cause: Radio link failure between the remote handset and the control unit. Check the remote handset and control unit synchronization. If the issue remains unresolved, contact an authorised service agent.

Question 2

Error LED flashes every 3 seconds: The caravan battery charge is low

Accepted Answer

Possible cause: Caravan battery state of charge is low. Finish manoeuvring as soon as you can, then charge the battery.

Question 3

Error LED flashes continuously: No manoeuvring is possible due to battery undervoltage

Accepted Answer

Possible cause: Caravan battery voltage has dropped below 11 V. Restore battery voltage above 11 V by means of recovery or battery charging before attempting further manoeuvring.

Question 4

Error LED flashes approx. 2 times per second (2 Hz): Overcurrent or overtemperature condition detected

Accepted Answer

Possible cause: System is overloaded or the motors have overheated. Switch the remote handset off and on again, waiting for the system to cool down in the event of overtemperature. If the fault persists, have repairs carried out by a specialist.

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`The LED flashes for roughly 10 seconds after switching on, then switches off`	System switches off automatically and cannot establish a radio link to the controller	Radio link failure between the remote handset and the control unit	Check the remote handset and control unit synchronization. If the issue remains unresolved, contact an authorised service agent.	DIY Check / Tech Fallback
`LED flashes every 3 seconds`	The caravan battery charge is low	Caravan battery state of charge is low	Finish manoeuvring as soon as you can, then charge the battery.	DIY Safe
`LED flashes continuously`	No manoeuvring is possible due to battery undervoltage	Caravan battery voltage has dropped below 11 V	Restore battery voltage above 11 V by means of recovery or battery charging before attempting further manoeuvring.	DIY Safe
`LED flashes approx. 2 times per second (2 Hz)`	Overcurrent or overtemperature condition detected	System is overloaded or the motors have overheated	Switch the remote handset off and on again, waiting for the system to cool down in the event of overtemperature. If the fault persists, have repairs carried out by a specialist.	DIY Check / Tech Fallback

Truma S

Technical Specifications

Master Troubleshooting & Diagnostics Matrix