3.4
Control
3.4.1
Operating conditions
Fig. 8: Control elements control unit
On the front of the control unit the LC display and T1, T2 and T3 buttons
are located. The button functions depend on the current operating con‐
dition.
The current operating condition is shown on the display as follows:
Operating conditions
Display
Operating status
Warning signals
Operation in accordance with
chapter
[Normal operation]
[NRV opened]
Motor-powered flap
open, main supply
230 V
Backflow protection is
assured
–
Operating condition - normal
operation
[Back pressure]
[NRV closed]
Motor-powered flap
closed
Backflow protection is
assured
Warning signal every
10 seconds
Operating condition – back
pressure
[Back pressure]
[Close emergency
lock]
Suggestion to close
emergency lock
Risk of flooding!
Continuous signal
Operating condition – back
pressure
Handling
Grundfix Plus Control backflow trap type 3
25