A reach-in with cap tube has the following conditions:
• Subcooling is 6° NORMAL
• Superheat is 0° LOW
Which of the following could cause this condition?
A. Overcharge
B. Undercharge
C. Restricted cap tube
D. Dirty condenser
Answer (2)
The most likely cause of 0° superheat and 6° normal subcooling in a refrigeration system is a restricted cap tube. This restriction prevents proper refrigerant flow, which results in insufficient heating and low superheat. Other potential causes such as overcharge, undercharge, and a dirty condenser do not match the observed conditions.
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In a refrigeration system with normal subcooling and low superheat, the most likely cause is a restricted cap tube, which can prevent adequate refrigerant flow and lead to insufficient superheating. Overcharged or undercharged systems show different symptoms, while a dirty condenser affects overall efficiency. Thus, a restriction in the capillary tube is the most fitting explanation for these readings. ;
