18 English 5.905-945.0 Rev. 00 (06/15)The device is equipped with a control and monitoring elec-tronic system that monitors a number of functions.In case of a continuous operation or a continuous break of30 minutes, the immediate switch-off and locking of the de-vice takes place.Moreover, a visual signal is issued via the operating dis-play (LED).Both functions can be deactivated by means of the DIPswitch (see circuit diagram).The system checks the device for leaks by monitoring thepressure switch. If the pressure switch opens twice within2 seconds and this recurs 10 times within 10 minutes, theimmediate switch-off and locking of the device takes place.Moreover, a visual signal is issued via the operating dis-play (LED).This function can be deactivated by means of the DIPswitch (see circuit diagram).If one phase fails, in case of excessive temperature, lowvoltage or in case of a voltage difference between 2 phas-es > 50 V, the immediate switch-off and locking of the de-vice takes place.Moreover, a visual signal is issued via the operating dis-play (LED).The excess temperature may occur due to the followingreasons:– Over or low voltage– Overload– Poor motor cooling (water shortage or high tempera-ture of the cooling water)Operating display:Error message:6.7 Electronics system6.7.1 Pump monitoring6.7.2 Leakage monitoring6.7.3 Motor protection6.7.4 DisplayLED illuminatesgreenOperation in orderLED blinks green Disconnection from the mains (time-out)LED is red Contactor or pressure switch not inorderLED blinks red once LeakLED blinks red twice Winding protection contact was trig-geredLED blinks red threetimesPower supplyLED blinks red fourtimesPower consumption is too highEnd motor blockade