HVAC Refrigerant problems

What are common causes of low indoor airflow in an air conditioning system?

• A clogged filter

• A collapsed duct

• A low blower speed

• All of the above

How is total superheat calculated in an air conditioning system?

• Saturated Temperature - Liquid Line Temperature

• Vapor Line Temperature - Saturated Temperature

• Liquid Line Temperature - Saturated Temperature

• Saturated Temperature - Vapor Line Temperature

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When an air conditioning system with a Thermostatic Expansion Valve (TXV) experiences a low indoor airflow problem, what changes are observed in the low side pressure and superheat?

• Low side pressure decreases, superheat increases.

• Low side pressure increases, superheat decreases.

• Both low side pressure and superheat decrease.

• Both low side pressure and superheat increase.

What indicates a low heat load inside a building?

• High superheat and low subcooling.

• Low saturated temperature and correct superheat.

• High saturated temperature and high superheat.

• Low superheat and high subcooling.

What indicates a liquid line restriction problem in an air conditioning system?

• High superheat and low subcooling.

• Low saturated temperature, high superheat, and relatively normal subcooling.

• High saturated temperature and low superheat.

• Low superheat and high subcooling.