Primary Fan Overrun After Switching Off The Electric Heater; Fault Function On Knx - Siemens KNX RDG400KN Basic Documentation

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Caution
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3.10.10 Primary fan overrun after switching off the electric
heater
To avoid overheating of the electric heater after it has been switched off, the air
flow must be maintained for a while.
In connection with a supply air controller (e.g. Synco RMU7..) this will be
automatically ensured by exchanging the necessary information. The controller of
the supply air fan will only switch off the supply air fan when all electric heaters are
cooled off.
The cool off time of the electric heater can be adjusted for each heater via P54
(factory setting is 60 seconds).
General rule: In case of insufficient air flow, the thermostat cannot protect the
electric heater against overtemperature. For this reason, the heater must be
equipped with a separate safety device (thermal cutout).

3.10.11 Fault function on KNX

If a fault occurs (e.g. digital fault input, dewpoint, communication configuration,
etc.), a fault is sent on the bus.
An RDG.. thermostat listens on the bus and sends its fault when it has the highest
alarm priority. This ensures that the management station does not miss any alarms.
If alarms occur at the same time, the alarm with the highest priority is first displayed
and sent on the bus.
Fault transmission is different in LTE- and S-Mode:
S-Mode
Fault state
Fault information
(internal
information)
The table below shows the error code and default alarm texts:
Fault
No fault
Bus power supply**)
Device address error
Condensation
External fault input X1
External fault input D1
*) Default alarm texts are stored in the thermostat's non-volatile memory and can be adjusted using
the ACS tool
**) This error will not be sent on the bus (because there is no bus!)
RDG400KN,RDG405KN Basic documentation
LTE-Mode
Alarm info (error code and internal information)
Alarm text (default text can be edited with ACS tool)
Thermostat Fault information on the bus
Display Error code
--- 0
5000
bus
Addr 6001
4930
AL1 9001
AL3 9003
Text
Default fault text
adjustable *)
No fault
No bus power
supply
>1 id device address
Condensation in the
room
Fault input 1
Fault input 3
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CE1P3192en
2019-04-12