Exam Question
Q7
With reference to a domestic refrigeration system:
(a) What are the indications of overcharge, undercharge and air ingress into the system?
(8)
(b) How are the above abnormalities rectified?
(8)
Class 2 (2nd Engineer)
MEP
📅 Jan 2026
Reference Answer
### (a) Indications of Overcharge, Undercharge, and Air Ingress
#### 1. Overcharge (Excess Refrigerant)
An overcharge condition occurs when the quantity of refrigerant in the system exceeds the manufacturer's specified amount. This leads to a series of detrimental effects on system performance and component longevity.
**Indications:**
#### 1. Overcharge (Excess Refrigerant)
An overcharge condition occurs when the quantity of refrigerant in the system exceeds the manufacturer's specified amount. This leads to a series of detrimental effects on system performance and component longevity.
**Indications:**
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