The Truma CP Classic is an analog rotary control panel used for managing RV heating and hot water systems, specifically compatible with Truma Combi and diesel/E variants.
 
Panel Layout & Controls:
 
Outer Control Knob: Used to select operating modes such as air heating, hot water, or combined heating and water.
 
Inner Control Knob: Adjusts the target room temperature settings (typically scaled 1 to 5 or equivalent increments).
 
Rotary Switch Settings:
 
Off: Turns the system off.
Hot Water Mode: Selects water temperature at either 40°C or 60°C.
Air Heating Mode: Activates space heating only.
 
Heating & Hot Water: Runs both functions concurrently.
 
LED Indicators:
 
Green LED: Illuminates steady when the system is powered "On".
Yellow/Amber LED: Illuminates during the boiler "heat-up" phase