And what about 12v power supply? Is it supplying up to 2A?
If you are using less than 2A power supply - check that you are releasing pump torque when pumping water in or pumping water out. Holding pump torque consumes a lot of current (almost as much as rotating the stepper motor) - so you may have insufficient current if you are holding the torque and simultatneusly pumping water in or out.
My PSU provides up to 6A - but it feeds Alk monitor + 2x 3-head dosers, but I ensure that only one device is consuming current at any singe time (by scheduling dosers to dose in non-overlapping schedules).
If you are using less than 2A power supply - check that you are releasing pump torque when pumping water in or pumping water out. Holding pump torque consumes a lot of current (almost as much as rotating the stepper motor) - so you may have insufficient current if you are holding the torque and simultatneusly pumping water in or out.
My PSU provides up to 6A - but it feeds Alk monitor + 2x 3-head dosers, but I ensure that only one device is consuming current at any singe time (by scheduling dosers to dose in non-overlapping schedules).
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