Bosch SRC 100 RF Installations- Und Bedienungsanleitung Seite 72

Fault displays and troubleshooting
Description
With one or more individual controls, the room
temperature is clearly below the set room temperature,
but the heat generator does not appear to respond to this.
One or more rooms that are not equipped with individual
controls are not heated or are heated insufficiently
One or more rooms only heat up relatively slowly or much
more slowly than before.
The flow temperature is very high.
Entries in the app Bosch HomeCom Easy (e.g. changing
the set room temperature) are not synchronised with the
individual controls,
or
the app Bosch HomeCom Easy does not display any
current data from one or more individual controls (e.g.
measured room temperature).
or
changes to an individual control (e.g. set room
temperature) are not transferred to the other individual
controls in this group (room).
No error message is displayed that the/ connection to the
K 30 RF/K 40 RF has been lost for longer than
60 minutes.
Table 4
72
Cause/Remedy
▶ Check whether restrictions or settings on the heat generator are the reason why the heat
generator is off.
▶ Use the EasyService app to check whether the individual control or individual controls
are correctly connected to the system ( Chapter 4.2.2).
Depending on the control type set, the flow temperature is calculated depending on the
separate individual controls. If there is no or only a relatively low heat demand for any
individual control, no or only a low flow temperature demand is sent to the heat generator.
Rooms that are not equipped with individual controls are not considered when determining
the flow temperature, depending on the control type set. It is therefore possible that these
rooms have a heat energy demand but are not supplied.
▶ Equip the rooms in question with individual controls and connect them to the system.
-or-
▶ In the system controller in the relevant heating circuit, change the control mode from
Single room-dependent to Outside temp.-compensated and parametrise the heating
curve accordingly.
If automatic hydraulic balancing is activated and there are significantly undersized radiators
in the system, this can result in radiators being throttled back relatively sharply
( Chapter 6.7).
▶ Check whether one or more radiators are not being adequately supplied with heating
water.
– Is the circulation pump sufficiently sized and correctly set?
– Are the individual controls for radiators installed correctly?
– Is a valve defective or jammed?
▶ Check the sizing of the radiators and replace them with larger ones if necessary.
▶ Deactivate automatic hydraulic balancing and carry out hydraulic balancing if necessary.
High and especially unusually high room setpoint temperatures (e.g. 26 °C) can lead to high
flow temperatures.
▶ Check the set room temperatures of the individual controls and reduce if necessary.
Undersizing the heat exchangers (radiators or underfloor heating system) can lead to high
flow temperatures ( Chapter 6.4.5).
▶ Check whether the heat exchangers (radiators or underfloor heating system) in all
rooms concerned are sufficiently sized; if necessary, replace the radiator with a larger
one.
▶ Exclude the room from the flow temperature calculation by removing the individual
control from the system using the app.
▶ In the system controller in the relevant heating circuit, change the control mode from
Single room-dependent to Outside temp.-compensated and parametrise the heating
curve accordingly.
An open door in combination with very different room temperatures can lead to high heat
transmission and thus to an unusually high heat energy demand in the room affected
( Chapter 6.4.6).
▶ Check the room temperature of the neighbouring room and whether the door to this
room is open.
▶ Keep doors closed if possible.
▶ Adjust the room temperatures of the rooms affected by adjusting the set room
temperatures.
The components of the individual control transmit in the 868 MHz frequency range. For
regulatory reasons, the maximum transmission time of each component is 1 % per hour. If
this transmission time is exhausted in one hour, these components (individual control,
Connect-Key K 30 RF, ...) no longer transmit until the hour is over and the limitation is
cancelled.
In normal operation, this 1 % per hour is not usually reached. However, during
commissioning (connection), software updates or intensive use of the app Bosch
HomeCom Easy (many changes to the individual control settings), for example, this 1 % per
hour may be reached.
After one hour, the transmission time is automatically reset to 0 and the components can
transmit again.
SRC 100 RF – 6721856014 (2024/11)