Hi there,

I recently purchased a GHL Doser second hand from a friend to replace the GHL Doser I was using.

When I connect the power supply and the PAB cable to the unit, all four pumps begin to run continuously and will not stop.

I am pretty sure I have my numbering correct and everything... here is a screen shot (I run 3 6 outlet PAB Powerbars too)

profilux switch.jpg

and a picture of one of the timer settings as an example:

profilux switch calcium.jpg

Any ideas what I may be doing wrong? My friend ran his unit off a profilux as well.