supermarket refrigerated showcase » article > display freezer > Compressor's influence on walk-in cooler (2)
Compressor's influence on walk-in cooler (2)
Compressor operation non-stop characteristics and maintenance
thermostat contact adhesion walk-in cooler internal temperature has reached temperature control The contact of the compressor is disconnected, but it cannot be separated due to the adhesion of the contacts, and the power supply of the compressor cannot be cut off, resulting in the compressor always running. Features: The walk-in cooler is too strong and the refrigerator compartment is also frozen. Repair method: unplug the walk-in cooler, turn the thermostat adjustment knob several times, then power on and test the machine, if it still doesn’t stop, you can only replace the thermostat: normal walk-in cooler can be controlled by a time controller The power supply time of the walk-in cooler realizes the on and off control.
Thermostat wiring terminal error The three wiring terminals on the thermostat are connected incorrectly, which will cause the compressor circuit to be connected and always run. Features: In addition to the above, the thermostat wiring does not match the schematic diagram. Repair method: Use a multimeter to judge, and then connect according to the correct position.
The number of coils of the temperature sensing tube is too small. The number of coils of the temperature sensing tube to the fixed box is small, and the sensing temperature is not sensitive. Feature: The refrigerator compartment also freezes. Repair method: re-wind the temperature sensing tube.
Solenoid reversing valve cannot be reversing dual-temperature dual-control walk-in cooler. A two-way solenoid reversing valve is provided to control the opening and closing of capillary tubes in the freezing and refrigerating rooms. If the solenoid reversing valve is always in the normally open position for some reason, Turning the refrigerator into a freezer is equivalent to rotating the freezing thermostat to the quick freezing position, so the walk-in cooler does not stop. Features: The ice in the refrigerator compartment is thick and not melted, and the freezer compartment is cooled normally. Maintenance method: first check the electrical components of the electromagnetic directional valve, and then consider replacing the electromagnetic directional valve as a whole.
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