The air temperature associated with a direct reciprocating air conditioning plant is found to be too warm, and the compressor is not operating. A service check determines the compressor suction pressure to be above the normal cut-in point, with a normal head pressure, and high evaporator superheat. Which of the following could be the cause of this problem?

Question

Accepted Answer

Option D: The low pressure control contacts are stuck open.. If the low pressure control contacts are stuck open, the electrical circuit to the compressor motor remains interrupted. This prevents the compressor from starting despite rising evaporator temperatures and suction pressures exceeding normal cut-in thresholds.