[Al_The_Man]

With the power off you can also check resistance for 0 ohms from the top of the O/L terminal to the corresponding bottom terminal. Some O/L's are mounted separate to the contactor, others are integral, but same function.
With the contactor non-activated the reset should stay in, and only possibly pop back out when the contactor is picked up, if overload exists.
Al.

[BESTCO]

I just did what you suggested (with the power off), and am getting a reading of 2 ohms between corresponding terminals (it is an integral O/L). What does this mean? and what would you suggest next?

[Al_The_Man]

0v to 2 ohms looks right.
O/L = over load.
(Alarm 90-4) "Coolant motor overload protection has tripped.

Somewhere it has to get this information and is usually the N.O/N.C. monitoring contacts on the O/L.
These are low voltage inputs into the controller?
You could also see if the the one(s) that are wired are registering open or closed, or opposite to what they are labeled (tripped state).
Al.

[BESTCO]

N.O./N.C. contacts? Where are these located. I'm sorry I'm new to all of this and don't know the technical terms/abbreviations a whole lot.

I attached some photos of the controller I'm working on. The red switch on the right is what I'm assuming to be the trip.

Attachment 186332Attachment 186334