If you haven't seen these before they can look a bit weird. Then when the little red pin pops out, like with other safety devices, you'd think you could push it in to reset. This is not the case. These are single use fuses. This particular chiller is a York YK, but these are used in different applications. The red pin is a trip indicator, not a reset like a breaker or safety. I've not had luck with having these in stock at supply houses in the past. I've always recommended my customers keep a set on hand for the day their SCR's go poof or a capacitor pops. Chiller training and community at chilleracademy.com.
