Robo-Tank DIY ATO System
User Manual – Page 8
In the kit, if applicable, you’ll see the sensor mounting bracket that you selected which you can now mount your sensors
to, the image below is an example. All the sensors have a 4mm spacing and if you’re using Sensor 3 for the reservoir
nothing goes in its position. On page 15 and 16 you can find diagrams showing how to wire the different sensors to the
included green screw terminal connectors.
Note the 2 pin “Backup” port on the ATO module must have a float switch plugged in, and in the closed position,
otherwise the ATO will not function. You can replace the float switch with a jumper to disable it, however that’s not
recommend.
After plugging in the sensors and powering up the ATO module the LED on the right hand side at back should light up
indicating the unit is powered and you will hear a series of quick beeps. If all the sensors are in the correct position for
the ATO to be on or off normally you will hear a long 2 second beep which is just to indicate the system is fully ready to
go and all sensors check out. This only happens when the ATO is powered up.
Remember if the ATO sensors are in the on position it’ll take 5 seconds before the ATO switches on as that’s the default
setting. You can choose to remove this delay or increase it by using the push buttons on the ATO module board, see
page 12.
NOTE: It takes 4 cycles before the auto calculated maximum allowable run-time to be activated, until this happens the
default maximum runtime of 5 minutes is used, when you setup the ATO and the first fill takes longer than this the ATO
alarm will go off so keep this in mind when placing the sensors in your aquarium or sump.
