USCG Exam PracticeAir conditioning, ventilation, and compressed air
A reciprocating refrigeration compressor trips off on its high-pressure cutout. Which of the following conditions is LEAST likely to be the cause?
- A. Fouled or dirty condenser reducing heat rejection
- B. Loss of condenser cooling water
- C. Non-condensable gas (air) in the system
- ✓ Loss of refrigerant chargeCorrect
Why D is correct
NAVEDTRA 14075 §6-2 identifies a dirty condenser, air in the system, and lost cooling water as causes of dangerously high discharge pressure that trips the high-pressure cutout. Loss of refrigerant charge reduces system pressure and is associated with tripping the low-pressure cutout, not the high-pressure cutout.
Cited:NAVEDTRA 14075 §6-2