Setting up the ATU-Pro4

NOTE: we have now revised this guide and advise re-calibrating the sensor for your particular tank

pretty self explanatory, please watch this review, the unit is all set up and should require no adjustments apart from calibrating the sensor as per video above


if you find its regularly going into an alarm state you will need to increase the alarm time – it is sent out set at 20 seconds (3 flashes of the green LED)

HERE IS A VIDEO ON SETTING THE CONTROLLER ALARM TIME (SAME AS THE ATU PRO3

NOTE: THE BLUE LIGHT ON THE SENSOR AND THE GREEN LIGHT ON THE CONTROLLER WILL BE SEEN TO FLASH ON/OFF INTERMITTENTLY! – THIS IS ONLY INDICATING SLIGHT VARIATIONS ON THE WATER LEVEL CAUSED BY SURFACE MOVEMENT -THIS IS NORMAL it is not until it detects a continuous low water level for 3 seconds or more will the pump activate (this is to prevent erratic pumping)