Do you mean that the manual operation of the coolant up and coolant down buttons don't function or do you mean the GCode will not move the coolant nozzle up and down as the program runs?We own a Haas VF-0 (1995 model) and a little problem is that the position of the coolant spigot cannot be adjusted when the machine is in operation.
Is this a problem that just started or has this never operated properly?
The reason I ask is that I had an issue with my PCOOL system that was not working properly i.e. not stopping at the correct postion and oscillating back and forth and alarming out. As it turns out the small micro switch that runs on the ratchet wheel was defective. If that is the case I can give you some information that may help.
I have a 2007 TM-1P with a 20 position PCOOL system and my software is surely different from yours.
You may want to look at setting 32 Coolant Override and make sure both machines are set the same.
There is another setting that tell the machine how many positions your PCOOL unit has. The newer ones have about 32 positions. I am not at my machine at the moment so I can't tell you exactly where to find that one and your software may be different as your machine is older than mine.