Grundfix Plus-Control – Modell 4987.41
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Troubleshooting by specialists
If faults cannot be rectified by the stated remedial measures, it must be clarified whether the problem should be searched for in the
control unit or in the area of the Grundfix Plus-Control.
The functionality of the backflow sensor can only be checked using a pressure test.
The following components are housed in the cover and can only be replaced by replacing the cover.
Q
Q
Motor
Q
Q
Motor spindle
Q
Q
Motor-driven flap mechanism
Q
Q
Pressure switch
Displayed error no. 4 / 5
Trigger a reset with T3 – The motor-driven flap will attempt to remove any possible blockages by opening and closing three times.
If the fault is rectified, the control unit switches back to »Normalbetrieb« (Norm. operation).
If the display shows "Error 1 / Motor fault during commissioning", the engine is defective and the cover must be replaced.
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