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System bleed diagnosis display cooler fault
System bleed diagnosis display cooler fault
Determine the opening position according to the fault condition of the overhaul machine, and observe the gas discharge of the display cooler to determine the amount of refrigerant in the system, compressor exhaust, and vacuum in the system Degree and unblocked conditions. Generally, the display cooler opens the compressor process tube to deflate; when there is a blockage failure due to the secondary failure, cut the capillary to deflate, and the butt-welding blocking machine also needs to cut or break the dry filter to deflate. Cutting method must be used for deflation, not gas welding method.
1. Open the compressor process tube to vent the diagnosis display cooler fault diagnosis process. For general models, unplug the power plug, and repair machines or models with suspected compressor discharge should be carried out while the compressor is running.
2. Open the capillary and bleed to diagnose the display cooler fault. It is only used for the rework machine. After the display cooler refrigeration system is repaired and filled with refrigerant, the refrigeration is still not or poor, and if there is a blockage in the refrigeration pipeline, the distance is dry and filtered Open the capillary tube at 5 cm of the device, and ensure that the two tubes cannot be sealed, and that the gas is uniformly discharged from the two nozzles at the same time.
①Only the capillary nozzle on the filter side has a gas discharge sound, indicating that the capillary side pipe is blocked. It may be that a small amount of water has entered the refrigeration pipeline during the maintenance process or the cooling pipe is not clean.
②Only the capillary side nozzle has the gas discharge sound, the filter nozzle has no gas discharge sound, and the filter side pipe is blocked. Most of the capillary and the filter are connected by welding. The weld is blocked.
③The sound of any nozzle of the opened capillary tube is uneven, indicating that the refrigeration system is dirty.
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