7 high-pressure switch, High-pressure switch – MovinCool CM12 Service Manual User Manual
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Operation Section
20
4.7 High-Pressure Switch
• The high-pressure switch prevents the
condenser and compressor from being
damaged by excessive high pressure in the
high-pressure line of the refrigeration cycle.
The switch is normally closed. The snap disk
responds to the variations in pressure and, if
pressure is abnormally high, the snap disk
moves down to push the pin down, causing the
internal contacts to open. This interrupts the
ground signal at the relay board which turns the compressor off.
I001768
Pressure of Refrigerant
Movable Point
Snap Disk
Pin
Terminal
Lead Wires
Stationary Point
Molding by Resin
Case