Grundfix Plus-Control – Modell 4987.41
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Button functions in case of backflow
In case of a backflow, the motor-driven flap closes
Display: »Rückstau RV-Geschlossen« (Back pressure NRV closed) with signal every 10 seconds
If the backflow ends, the motor-driven flap opens and the control unit switches back to »Normalbetrieb« (Norm. operation).
During the backflow, the buttons have the following functions
Q
Q
Switch off signal
Call up »Ton Aus« (Sound Off) with T1 and confirm with T3
Q
Q
Forces motor-driven flap to open
Keep T3 pressed for five seconds – Display: »Zwangsöffnung RV-geöffnet«
(Forced opening Backflow valve open)
The forced opening can then be necessary if the motor-driven flap does not automatically open after the termination of the back-
flow situation - due to a defective backflow sensor.
With T3, you can leave »Zwangsöffnung RV-geöffnet« (Positive opening NRV open): The control unit goes into »Rückstau«
(Back pressure) mode if the backflow still exists. Otherwise, it enters »Normalbetrieb« (Norm. operation).
Button functions in case of faults
Mechanical faults or errors in the control unit are shown on the display and an acoustic alarm is provided.
During a fault, the buttons have the following functions
Q
Q
Switch off signal
Call up »Ton Aus« (Sound Off) with T1 and confirm with T3
Q
Q
Remove possible blockages
A initialisation is triggered with T3 - the motor-driven flap will open and close three
times – if the fault is not removed, the display will show »Fehler 1 / Motorstörung
Inbetriebnahme« (Error 1 / Motor fault during commissioning)
See following chapter "Troubleshooting" for the procedure in case of faults.
Troubleshooting
Mechanical faults or errors are shown on the display and an acoustic alarm is provided. The failure search is supported by displays
and limited to a few components.
Q
Q
Mains adapter, battery
Q
Q
Control unit
Q
Q
Engine, motor-driven flap with mechanism
Q
Q
Pressure switch
If the control unit registers a defect - during the daily self-test or due to failure of the mains or battery power - the relevant error
messages are shown on the display.
Note
To avoid damage to the mechanism, button functions should only be used if the cover is firmly screwed to the
Grundfix
Plus-Control.
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