EB 5573 EN
99
Error during operation
9.2 Sensor failure
As described in the error list, sensor failures are indicated by displaying Err 1 error message
in the error level. For detailed information, exit the error level and view the different tempera-
ture values in the information level: each sensor icon displayed together with three dashes in-
stead 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 tempera-
ture set point of 50 °C or the 'Max. flow temperature' when the max. flow temperature
(set in PA1, 2) is lower than 50 °C. With the setting CO1, 2 > F05 - 1 (underfloor heat-
ing), 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 de-
fective, 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 associ-
ated valve is closed.
−
Return flow sensors RüF1/2:
when the return flow sensor fails, the controller continues
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.
Summary of Contents for TROVIS 5573
Page 144: ...144 EB 5573 EN Key number 1732...
