4
Flow sensor(s) in heating circuit(s)
: When the flow sensors in the heating circuits are de-
fective, the associated valve moves to 30 % travel. DHW heating using such a sensor to
measure the charging temperature is suspended.
4
Flow sensors in the DHW circuit with control valve
: When the flow sensor VF4 fails, the
controller behaves as if VF4 had not been configured. As soon as the control of the
charging temperature becomes impossible (VF2 defective), the associated valve is closed.
4
Return flow sensors RüF 1/2
: When the return flow sensor fails, the controller continues
operation without return flow temperature limitation.
4
Room sensors RF1/2
: When the room sensor fails, the controller uses the settings for op-
eration without room sensor. The controller, for example, switches from optimizing mode
to reduced operation; adaptation mode is canceled. The last determined heating charac-
teristic remains unchanged.
4
Storage sensors SF 1/2
: When one of the two sensors fails, the storage tank is no longer
charged (exception: solar system).
4
Solar sensors SF 3, VF 3
: When one of the two sensors fails, the storage tank in the solar
circuit is no longer charged.
8.3
Temperature monitoring
When a system deviation greater than 10 °C persists in a control circuit for 30 minutes, an
“Err 6“ alarm (temperature monitoring alarm) is generated.
Functions
WE
Configuration
Temperature monitoring
0
CO5 -> F19 - 1
8.4
Collective error alarm
With the setting CO5 -> F07 - 1, the binary output BA13 is set when an error occurs.
Functions
WE
Configuration
Fault indication output BA13
0
CO5 -> F07 - 1
8.5
Error status register
The error status register is used to indicate controller or system errors. In modem mode when
the controller connects to the building control system (GLT) both when an error is detected
and when it has been corrected, each change in the status of the error status register causes
the controller to dial the control system.
Using the function blocks in the configuration level CO8, individual controller inputs that are
not used can be assigned as binary inputs to the error status register. Either the open or
EB 5576 EN
89
Operational faults
