Handling Faults - Siemens DF301 Basic Documentation

Temperature out
of range
Fault "Er1" on display
Fault "Er2" on display
Fault "Er3" on display
Power failure
Siemens.........................RDF301, RDF301.50..., RDF600KN, RDF600KN/VB, RDF600KN/S
Smart Infrastructure

3.10 Handling faults

When the room temperature is outside the measuring range, i.e. above 49 °C or
below 0 °C, the temperature value will blink at the limit values, i.e. "0 °C" or "49
°C". After the temperature returns to within the measuring range, the thermostat will
continue to work.
For heating application, the heating output will be turned on when the temperature
drops below the limit value, provided the Protection mode setpoint is not set to Off.
The cooling output in cooling applications will be turned off when the temperature
exceeds the limit value, provided the Protection mode setpoint is not set to Off.
No output is activated if protection mode setpoint is set to Off.
When the built-in sensor fails and no external sensor is connected, the thermostat
shows the fault message "Er1" on the display. The thermostat needs to be
replaced.
When the internal non-volatile memory has error, e.g. unable to read or write, the
thermostat shows the fault message "Er2" on the display. If it is only data corruption
in the memory, a master reset can fix this error. Otherwise, the thermostat is
defective and need to be replaced.
When the external sensor is selected for floor temperature limitation (P51 ≠ OFF)
and is not working properly, e.g. faulty or sensor is missing, the thermostat shows
the fault message "Er3" on the display.
The heating output turns off immediately to ensure safety and avoid overheating of
the floor. The room temperature measured by internal sensor continues to be
shown on the LCD display.
Note:
1) Er1 has a higher display priority than Er2.
2) Once the external sensor fault is removed, the thermostat returns to normal
working mode.
For fault status messages on the bus, see section 3.11.8.
In the event of a power failure, all working conditions (operating mode, setpoint, fan
stage, all control parameter settings) are stored without time limitation.
When power returns, the thermostat reloads this data and continues to work in the
same conditions as before.
Basic Documentation
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CE1P3171en
2020-02-21