Grohe 38 698 Manual page 7

Fault/cause/remedy
Fault Cause
LED in electronics flashing • Obstacle during calibration
continuously after
calibration
• Servo motor defective
No flushing • Water supply interrupted
• No voltage (LED in electronics not
• Electronics defective (LED not flashing or
• Servo motor defective
• Plug-in connector without contact
• Detection zone of sensor system set too
• Servo motor and electronics not calibrated - Calibrate servo motor
Water flowing • Waste not closing
continuously
Undesired flushing • Detection zone of sensor system set too
Flow volume too low • Servo motor defective or not calibrated
• Residual flow rate in cistern too high
• Flow rate in cistern too low
4
flashing)
permanently on)
low
high
(incomplete rotation)
Remedy
- Perform calibration again, ensuring there is no
obstacle in the adjustment range of the servo
motor
- Replace servo motor
- Open isolating valve in cistern
- Switch on power supply or replace transformer
- Replace electronics
- Replace servo motor
- Attach plug-in connector
- Increase detection zone using remote control
(special accessories 36 407)
- Maintain or replace waste, see technical
product information for cistern
- Calibrate servo motor
- An opposing object is detected. Reduce
detection zone using remote control
(special accessories 36 407)
- Replace or calibrate servo motor
- Push residual flow slider at waste downwards
- Turn float of filler valve upwards