Question

question 30
if we operate a heat pump in the cooling mode, when the temperature is too low, we
maximum the efficiency
minimize the efficiency
extend the life of the unit
risk damaging the compressor
overload the crankcase heater

Explanation:

When operating a heat - pump in cooling mode at very low temperatures, the refrigerant may not vaporize properly, which can cause liquid refrigerant to enter the compressor. This can damage the compressor as compressors are designed to handle vapor, not liquid.

Answer:

risk damaging the compressor