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8
Malfunctions
The controller's reaction when a sensor is defective or a sensor is missing is described in fol-
lowing:
4
Flow sensor:
For three-step control, the control valve takes on the valve position 30 %.
For on/off control, the controller regulates the on/off output at 30-minute intervals as
long as the time set under Minimum activation time (P14).
The
icon blinks on the display when the sensor fails.
4
Outdoor sensor:
A flow temperature set point of 50 °C is used for control, or the Maximum flow tempera-
ture is used if the maximum flow temperature (P4) is lower than 50 °C.
The
icon blinks on the display when the sensor fails.
4
Return flow sensor:
The return flow temperature limit function is deactivated.
4
Room sensor in room panel:
The flow temperature control is no longer affected by the measured room temperature.
The
icon blinks on the display when the sensor fails.
4
DHW sensor:
The monitoring of priority changes to storage tank sensor, if necessary.
4
Storage tank sensor:
There is no storage tank charging.
Malfunctions
35
EB 5432 EN
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