Legacy GT LTD Sedan AWD F4-2.5L DOHC (1998)
Receiver Dryer: Description and Operation
Dual Switch
Receiver Drier
DUAL SWITCH
The dual switch is located on the high pressure line above the receiver dryer. When an abnormal pressure occurs in the high pressure line, the dual switch
is forced to OFF to stop operation of the compressor.
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When the pressure is abnormally low [177 kPa (1.8 kg/sq.cm, 26 psi) or less]
The dual switch is forced to OFF to prevent operation of the compressor when there is no gas caused by leakage of the refrigerant.
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When the pressure is abnormally high [2,940 kPa (30 kg/sq.cm, 427 psi) or more] The dual switch is forced to OFF to protect the air-conditioning
cycle parts.
During normal operation (Contact point is ON)
When the refrigerant pressure is applied from inside the housing to the seal film, a force is exerted from the stopper, guide head, high pressure disc and
high pressure internal lid to the low pressure disc to set the low pressure guide pin free, causing the moving contact to be ON.
During abnormal low-pressure operation [P < approx. 177 kPa (1.8 kg/sq.cm,26 psi)]