Operation Section
24
4.6 Accumulator
• The accumulator is mounted on the suction
gas piping between the evaporator and the
compressor. The accumulator separates the
liquid refrigerant from the gas refrigerant,
allowing only the gas refrigerant to enter the
compressor. In the accumulator, suction gas is
led into a cylindrical vessel where the speed of
the gas is decreased. This process separates
the refrigerant contained in the gas by the force
of gravity, causing the refrigerant to accumulate at the bottom of the vessel. As a result, the
compressor is protected from possible damage caused by liquid refrigerant intake.
4.7 High-Pressure Switch
• The high-pressure switch prevents the
condenser and compressor from being
damaged by excessively 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.
• Possible causes of this trouble include:
- The condenser air filter is dirty, and restricting air flow.
- The condenser fan motor is defective.
I000514
from Evaporator
to Compressor
I001768
Pressure of Refrigerant
Movable Point
Snap Disk
Pin
Terminal
Lead Wires
Stationary Point
Molding by Resin
Case
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