Grohe TECTRON 38 759, Manual

5

Control reverts to normal mode.
Pressing the radio transmitter again following successful 
registration (in normal mode) triggers flushing.

Further radio transmitters are registered as described above.

Deleting a radio transmitter

1. Press button (F) (LED flashes once briefly in confirmation) 

and hold for 8 seconds.

2. Holding the button continuously for 8 seconds deletes all 

registered radio transmitters; LED flashes once briefly in 
confirmation.

Control reverts to normal mode.

Setting the flow volume

1. Activate registration mode by pressing the button; 

LED flashes once in confirmation.

2. Press and hold the button again in registration mode. 

LED flashes rapidly in confirmation.
This flashing signal is interrupted for 1 second 
after 5 seconds.

3. Release the button within 2 seconds. Flush duration 

adjustment mode is activated.

4. The flow volume is selected by pressing the button

- button pressed for first time (within 2 seconds):

        3 flashing signals = flow volume 3 litres

- button pressed for second time (within 2 seconds):

        4 flashing signals = flow volume 4 litres

- button pressed for third time (within 2 seconds):

        5 flashing signals = flow volume 5 litres

- button pressed for fourth time (within 2 seconds):

        6 flashing signals = flow volume 6 litres (factory setting)

- button pressed for fifth time (within 2 seconds):

        7 flashing signals = flow volume 9 litres 

- button pressed for sixth time (within 2 seconds):

        3 flashing signals = flow volume 3 litres 
After the group with 7 flashing signals, the routine starts from 
the beginning.
5. The flow volume is selected by refraining from pressing the 

button within 2 seconds after the desired flow volume is 
signalled.

6. One flush is performed at the set volume with the signal 

flashing once more.

7. The flow volume can be changed within 20 seconds of 

flushing (if necessary) by pressing the button again. The 
selected flush setting is stored if the button is not pressed 
again within 20 seconds of flushing.

Control reverts to normal mode.

Switching 72-hour flush on and off

(factory setting: switched on)
1. Activate registration mode by pressing the button. 

LED flashes once in confirmation.

2. Press and hold the button again in registration mode. 

LED flashes rapidly in confirmation. 
The signal is interrupted for 1 second after 5 seconds.

3. Keep the button pressed. After 5 seconds, the LED 

extinguishes for 2 seconds. The LED then illuminates 
continuously.

4. Release the button.
5. Switch the 72-hour flush on or off by pressing the button 

again within the following 2 seconds.

- 4 short flashing signals after the button is pressed =

       72-hour flush is switched on.

- 2 long flashing signals after the button is pressed = 

       72-hour flush is switched off.
6. Each press of the button switches between the two states.
7. If the button is not pressed again within 10 seconds, control 

reverts to normal mode.

Maintenance

• Shut off water supply
• Switch off voltage supply
• Inspect and clean all components and replace if necessary

See technical product information for cistern for 
information on maintaining the cistern parts.

Replacing the transformer

, see fold-out page III, Fig. [29]

Replacing the servo motor

1. Disassemble plate, see fold-out page III, Fig. [27].
2. Disconnect plug-in connectors, see Fig. [30].
3. Disassemble servo motor, see Fig. [31a] or [31b].
4. Calibrate new servo motor, see 

Calibrating the servo 

motor

.

5. Install new servo motor, see 

Installing the servo motor

.

6. Install wall plate, see 

Installing the plate

.

Replacing the electronics

1. Disassemble plate, see fold-out page III, Fig. [27].
2. Disconnect plug-in connectors, see Fig. [30].
3. Disassemble servo motor, see Fig. [31a] or [31b].
4. Replace electronic module, see Fig. [32].
5. Calibrate servo motor, see 

Calibrating the servo motor

.

6. Install servo motor, see 

Installing the servo motor

.

7. Register radio transmitter, see 

Registering a radio 

transmitter

.

8. Install wall plate, see 

Installing the plate

.

Calibrating the servo motor

Caution

: The servo motor must be calibrated outside the 

cistern.

1. Connect voltage supply, see fold-out page IV, Fig. [33].

The servo motor must not be connected when 
performing this operation.

The LED in the electronics begins to flash.

2. Connect servo motor to electronic module, see Fig. [34].

The LED in the electronics stops flashing and adjustment 
automatically starts. The servo motor moves to the 
adjustment positions.

Caution

: It must be ensured that the movement is not 

disrupted by obstacles.

To prevent falsification of the servo motor adjustment, the lever 
must not be removed.

Calibration has been completed when lever is at approx. 90° 
and the LED in the electronics does not flash, otherwise see 
section: 

Fault/cause/remedy

.

3. Disconnect plug-in connectors, see Fig. [35].

Replacement parts

, see fold-out page I (* = special 

accessories).

Care

For directions on the care of this fitting, please refer to the 
accompanying Care Instructions.