Spindle starts upon exit of Linuxcnc. How to stop?

Hoping for some help.

I don't have my mill 100% yet, but noticed during some spindle calibrating that the router/spindle would turn on when I would exit out of Linuxcnc if I forgot to mash the e-stop. Is there a way to stop this?

I'm using a Mesa 5i25 card, Gecko G540 and a SuperPID. Everything seems to work as expected except for that safety concern.

I have it wired like this

Are you using the G540s chargepump feature?
I would think that would disable the G540s outputs
when not driven.

Also it's strange that the estop state before exiting makes
any difference as the 6I25 outputs will all be in the same state (high)
when linuxCNC exits.

Thanks for the reply PCW.
Yes I am using the G540 Chargepump. Although maybe not the proper way?

This is what I have in my cutom.hal...
# ---estop signals---
net estop-ext <= hm2_5i25.0.gpio.003.in_not
net estop-ext => iocontrol.0.emc-enable-in
net estop-out <= iocontrol.0.user-enable-out
net estop-out => hm2_5i25.0.stepgen.04.enable

It does seem to work. The Emergency and Machine power buttons are both greyed out until I reset the E-Stop button.

Gecko G540 has a small switch on the front, recessed, what side is it on? And what is written on the side the switch is on?

tommylight, you were on to something. The chargepump switch was in the on position. Just for verification purposes I turned it off and then back on. Now the fault light stays on with the e-stop active or not or LCNC running or not.

Thanks for the hint. Where do I go from here? I'll see about making changes to get the chargepump working. Thanks

Been long since i used charge pump, so better wait for more experinced users.