Prozeda Primos 250 SR - Fault Message Identification and Causes

Faults
43
The table below shows the faults with fault messages:
Fault message Possible cause Action
!
flashing
A sensor line is interrupted.
Here S2
Make sure that the sensor lines
are intact.
A sensor is faulty.
Check the sensor resistance. If
necessary, replace the sensor.
!
flashing
A short circuit has occurred in
the sensor line. Here S1.
Make sure that the sensor lines
are intact.
A sensor is faulty.
Check the sensor resistance. If
necessary, replace the sensor.
!
°C
flashing
Circulation fault: No flow
The controller does not switch
off the pump in this case!
A fault has occurred in a pump
connection.
Make sure that the pump
wiring is intact.
A pump is faulty.
Replace the pump.
There is air in the system.
Vent the system.
A sensor line is faulty.
Make sure that the sensor lines
are intact.
A sensor is faulty. Check the sensor resistance .
If necessary, replace the sensor.