Refrigerant quantity and defrost: how an incorrect charge affects operation

The correct amount of refrigerant is essential for the proper operation of the heat pump, especially at low temperatures.

Insufficient charging

It can lead to low efficiency, unusual temperatures, and insufficient heat for effective defrosting.

Overcharging

It can also cause incorrect pressures and problematic operation of the refrigeration cycle.

Not diagnosed by ice alone

Icing alone does not prove an incorrect amount of refrigerant.

Correct diagnosis

The assessment is made by a refrigeration technician based on pressures, temperatures, superheat/subcooling where applicable, and the manufacturer's instructions.