Blinking Blue lights on Jebao SoW-8 units

[snowhite]

I recently receive 4 Jebao SOW-8 pumps. All of them function perfectly on their own, but when set to Master/Slave, 2 of them continually go into a mode of not working and has Blue Blinking Lights. I've tried swapping the units around in different combinations thinking maybe there's some difference between them, but the same two keep going into some fault mode when set as either Master or Slave.

Anyone come across this before I send the two units back? I'd prefer to have them master/slave so they can swap back and forth.

 

[snowhite]

anyone?

 

[J-Hall]

I just received the same pump, with the same problem. Did you end up finding a fix?