My osmolator did this back in the fall too. I haven't been able to dig into it to really see what's going on but, from the cursory inspection I did, I'm suspecting the voltage regulator IC is toast. When the pump is unplugged, the controller works fine but as soon as the pump is plugged in it causes the head unit to either shut off or not output the right signals. Same effect when i tried a new power supply. To me that suggests that the voltage regulator can't handle the draw of the pump.
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