Inspection and repair method for leakage of high and low temperature damp heat test box

The refrigeration system of the high and low temperature damp heat test chamber is normal, and the tank is leaking. The cause of this failure may be caused by the following four aspects.

First, the induction leakage high and low temperature damp heat test box refrigeration is normal, the human hand touches the box body has a feeling of hand, the cause of this phenomenon is induced leakage. The high and low temperature damp heat test chamber compressor and internal lighting circuit pass through the box and the inner wall, and there is a certain distributed capacitance. The compressor motor is an induction motor, and a self-inductance potential is generated on the rotor. At this time, the high and low temperature damp heat test chamber is as There is no reliable grounding wire, and there is a feeling of numbness when the person touches the box.

Second, the compressor leakage compressor motor winding and the chassis short circuit caused leakage of the box. The compressor leaks and the tank voltage is high, close to the power supply voltage.

Third, the temperature controller leakage Because most of the high and low temperature damp heat test chamber thermostats are installed on the inner wall, the temperature inside the box will cause the temperature controller to be exposed. When condensed water flows into the thermostat, the resistance value between the thermostat contact and the case decreases, resulting in leakage.

4. Some components in the box are damaged or the wires are aging or damaged, causing leakage.

Maintenance method:

1. Check the user's power connector, whether the grounding is normal, and whether the grounding wire is short-circuited;

2. Check whether the cooling of the high and low temperature damp heat test chamber is normal after power-on, and whether the human hand touches the box body has obvious hand feeling;

3, first check the insulation of the compressor, check the ground resistance with megaohmmeter is ≥ 20MΩ;

4. Check the insulation of the suspect component thermostat, lamp and external circuit;

After the above checks, no abnormal conditions have been found. In this case, please contact the test box manufacturer for repair.

Linen Shirt

Linen Shirt,Printing Hawaiian Shirts,Short Sleeve Hawaiian Shirts,Hawaiian Beach Men Shirts

Shaoxing Bosheng Garment-Making Co.,Ltd. , https://www.boshengshirt.com