When should the reefer be defrosted?

Defrosting the reefer is essential for maintaining its efficiency and prolonging its lifespan. The correct guideline is to defrost the reefer when 1/4 or more of frost forms on the surface coils. At this point, the frost accumulation can significantly impede the proper functioning of the refrigeration system. Excess frost acts as an insulating barrier that hinders heat exchange, thus reducing the machine's efficiency. When the frost level exceeds this threshold, the refrigerator needs to work harder to maintain a stable temperature, which can lead to increased energy consumption and potential equipment malfunction.

Defrosting at this stage ensures that the unit operates optimally, ultimately saving energy and preventing potential mechanical failures. Other options, such as defrosting only when frost is evident or setting a monthly schedule, do not address the underlying need based on performance efficiency. Regularly checking the frost level and deciding to defrost based on the 1/4 threshold allows for a more responsive maintenance approach rather than a rigid schedule that might not align with actual operational needs.