USCG Exam PracticeAir conditioning, ventilation, and compressed air
A refrigeration compressor trips on its high-pressure cutout. Which of the following is a likely cause?
- A. Loss of refrigerant charge
- B. A starved evaporator
- ✓ A fouled condenser or loss of cooling waterCorrect
- D. Liquid floodback to the compressor suction
Why C is correct
NAVEDTRA 14075 §6-2 identifies a dirty condenser, air in the system, or lost cooling water as causes of dangerously high discharge pressure that trips the high-pressure cutout. Loss of charge and a starved evaporator cause low suction pressure, tripping the low-pressure cutout instead.
Cited:NAVEDTRA 14075 §6-2