I've had fairly good experience with these from a design aspect even to the point of finding some example problems that were exactly what I was involved with. Both give step by step methods for design which maybe you could use in a troubleshooting way.
"Applied Process Design for Chemical and Petrochemical Plants", volumes 1 - 3, Ernest E. Ludwig, Gulf Publishing
These books cover most unit .
"Process Heat Transfer", Donald Q. Kern, McGraw-Hill
This book focuses on heat transfer and exchanger .
A word of caution though, be sure you check the math when looking over any example problem.