During this lab, the students determine that one of the components was shorted. The short affected the fan motor inside the ice maker.

One student installs a new current relay in the ice maker while another student removes the shorted fan.
...and other students take it apart	Meanwhile, another student strips the wires to reterminate the connections.
After the new fan is installed, the equipment is tested and its operating temperatures are recorded.
After some instruction, students closely inspect all parts of a commercial refrigeration unit...
...including the wiring in the back	The instructor explains the timer and recorder part of a diagnostic tool
A commercial produce case uses four different voltages; students must trace the complex circuitry and learn how all four work incongruously (as one) to make the unit work properly.
Students trace the wiring to the CA-27 relays in the produce case.	The instructor discusses the ice cream freezer with a student
Students also work on a combination walk-in cooler/ freezer ...	...and learn how to wire its evaporator.