Remedy fault 507 / 516 / 517 (gas supply interrupted) Restore the gas supply, for example by connecting a full gas cylinder. Then confirm or

Detailed information about the fault codes, their cause and how to fix them can be found in the Operating and Installation Instructions of the Truma CP

Combi E in mixed mode (combined gas and electric heating operation): Warning indicates lack of gas supply. The heater now only runs in electric mode.