See also Operating Instructions B3171 [2] enclosed with the thermostat.
Layout
 |
RDF302, RDF302/VB, RDF302.B |
| 1 Operating mode selector |
| 2 Button to change fan operation |
| 3 Buttons to adjust setpoints and control parameters |
Button operation
| User action | Effect, description |
|---|---|
| Normal operation | Actual operating mode and state are indicated by symbols |
| Press any button (thermostat in normal operation) |
Backlit LCD turns on and… (see below for further action) After the last operation and a timeout of 20 seconds, the LCD backlight turns off |
| Press left button | Change operating mode |
| Press left button (P01 = 2) | Toggle between heating and cooling |
| Press left button >5 seconds | Activate / deactivate key lock |
| Press right button | Change fan mode |
| Press + or – | Adjusts the Comfort room temperature setpoint . Thermostat changes to Comfort mode |
| Press + and – >3 seconds, release, then press + again >3 seconds |
Go to parameter setting mode “Service level” |
| Press + and – >3 seconds, release, then press – again >3 seconds |
Go to parameter setting mode “Expert level”, diagnostics and test |
Display
 |
|
1 Operating mode
2 Displays room temperature, setpoints and control parameters
3 Fan mode
4 |
5 Heating/cooling mode
6 7 Additional user information, like outdoor temperature ( 8 |
Protection
Comfort
Economy
Symbol indicates current room temperature
Auto fan active
Fan speed
Indicates fault or reminder
Cooling
Heating
Electrical heater active
Condensation in room (dew point sensor active)
) or time from Modbus (selectable via parameters)
Key lock active