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EQJW146F001 EN
Error during operation
6.2 Sensor failure
As described in the error list, sensor failures are indicated by displaying Err 1 error mes-
sage in the error level. For detailed information, exit the error level and view the different
temperature values in the information level: each sensor icon displayed together with three
dashes instead of the measured value indicates a defective sensor. The following list explains
how the controller responds to the failure of the different sensors.
−
Outdoor sensor AF1:
when the outdoor sensor fails, the controller uses a flow tem-
perature set point of 50 °C or the 'Max. flow temperature' when the max. flow tempera-
ture (set in PA1, 2) is lower than 50 °C. With the setting CO1, 2 > F05 - 1 (underfloor
heating), the flow temperature set point is 30 °C in the event of a malfunction.
−
Flow sensor(s) in heating circuit(s):
when the flow sensors in the heating circuits
are defective, the associated valve moves to 30 % travel. DHW heating using
such a sensor to measure the charging temperature is suspended.
−
Flow sensors in the DHW circuit with control valve:
when the flow sensor VF4
fails, the controller behaves as if VF4 has not been configured. As soon as the control of
the charging temperature/DHW temperature becomes impossible (VF2 defective), the
associated valve is closed.
−
Return flow sensors RüF1/2:
when the return flow sensor fails, the controller con-
tinues operation without return flow temperature limitation.
−
Room sensors RF1/RF2:
when the room sensor fails, the controller uses the settings
for operation without room sensor. The controller, for example switches from optimizing
mode to reduced operation. The adaptation mode is canceled. The last determined heat-
ing characteristic remains unchanged.
−
Storage tank sensors SF1/SF2:
when one of the two sensors fails, the storage tank
is no longer charged (exception: solar system).
−
Solar circuit sensors SF3, VF3:
When one of the two sensors fails, the storage tank
in the solar circuit is no longer charged.
6.3 Temperature monitoring
If a control deviation greater than 10 °C occurs in a control circuit for a period of 30
minutes, an error message “Err 6” (temperature monitoring alarm) is generated.
Function
WE
Configuration
Temperature monitoring
0
CO5 > F19 -1
