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What to do with walk-in cooler leakage
author: supermarket refrigerated showcase category: walk-in display coolers Views: 541Time: 2016-08-22
What to do with walk-in cooler leakage
walk-in cooler leakage characteristics and repair
walk-in cooler has slight leakage or inductance. Severe leakage is not safe for man and machine.
1. walk-in cooler Causes of electric leakage Due to humidity and high air humidity, the insulation resistance of electrical components and shelves is reduced: oil stains on the compressor terminal and surroundings will also reduce the insulation performance and cause a slight leakage. Insulation damage to compressors, electrical appliances, circuits, etc., causes parts that should not be charged to be charged, and short-circuits with the walk-in cooler, causing serious leakage. The screw of the ground wire connection is loose, the ground wire is short-circuited due to corrosion, or the ground wire is not plugged in during maintenance, which makes the ground wire lose its function and gives a numb feel. The internal coil and the shell should be insulated. If the performance of the internal insulating material decreases, it will cause resistance between the coil and the shell, which will charge the shell and cause the walk-in cooler to become charged through the refrigeration pipeline.
2. Walk-in cooler Leakage inspection and repair method. Bulb method: connect the two wires ' to the small bulb; one is connected to the part to be checked (such as the machine: shell), and the other is grounded. If the bulb is on, it means leakage ( Touch the shell). Pen method: touch the test part with a test pen, if the test pen is bright, it means a slight leakage. Pen method: electricity: if there is a strong light, it means a serious leakage. Voltage method: Use a multimeter to measure AC 250V or 500V. If there is a voltage indicator, it means leakage. Resistance method: place the multimeter at R× 10k or use a megohmmeter, one test lead is connected to the power plug, and the other test lead is connected to the walk-in cooler body without paint on the metal surface, the insulation resistance should be greater than 2MQ for leakage.
3. Walk-in cooler Common leakage form Compressor leakage: use a multimeter R× 10k block to measure the resistance between the compressor terminal and the housing, just replace the compressor of the same model. Low temperature compensation heater leakage: low temperature compensation heating wire bulge, measuring resistance between the heating wire and the walk-in cooler body metal, remove the low temperature compensation heater and use it. Temperature controller leakage or wiring error: The temperature controller is too humid, and there is a certain resistance value between the temperature sensing tube and the housing. The temperature controller should be replaced: some temperature controllers are equipped with grounding terminals, which are generally the same as the grounding terminals. The metal shell of the thermostat is connected, and the yellow and green ground wire should be inserted. If the 220V neutral or live wire is mistakenly connected, it will cause the thermostat box and the walk-in cooler body to carry 220V voltage, which is very dangerous. The walk-in cooler back wiring diagram is correctly wired.
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