SWITCH AS-ROCKER 4436503 - Caterpillar

Illustration 1 g00457427
(16) Pressure switch (R) Inlet for refrigerantPressure switch (16) detects high pressure in the cooling circuit. Pressure switch (16) also detects low pressure in the cooling circuit. High Pressure
When pressure increases abnormally between compressor (2) and expansion valve (28), pressure switch (16) cuts off voltage to compressor (2) in order to protect the circuit.Low Pressure
If the system pressure decreases abnormally between compressor (2) and expansion valve (28), a refrigerant leak is evident. Pressure switch (16) cuts off voltage to compressor (2) in order to protect the circuit. When a refrigerant leak exists, compressor oil is also lost. The pressure switch helps prevent a seizure of the compressor due to a lack of compressor oil.