1. First cut off power to the equipment, remove each power cord from the compressor power terminal, and use an instrument to measure the compressor winding resistance and ground insulation resistance; if the ground insulation resistance It's very small, it means the internal coil of the compressor is damaged and the compressor needs to be replaced with a new one. 2. The insulation resistance to ground is qualified and the winding resistance is also normal. Focus on checking for abnormalities in the compressor power supply line. 3. Use a test pen to check that there is a strong bright light, which indicates a serious leakage of electricity. If you touch the outside of the air conditioner, the mechanical shell and knobs will feel numb. If you use a test pen to check and there is a faint light, it is a slight leakage of electricity. In this case, it is recommended to contact a professional to come to your home. Construction and maintenance.
The reasons for this situation:
1. The high-pressure output buffer pipe in the compressor is broken, or the screws fixing this pipe are loose, causing the high-pressure pipe to not exhaust and the low-pressure pipe to not It sucks air, so although the compressor is running, it is not cooling. 2. There is no field connection, which means the insulation between the air compressor and the field. If the air compressor outlet is a rubber hose, there may be a false high zero potential, and the electronic control system may malfunction when the air compressor is running. 3. The neutral wire is in poor contact or there is no neutral wire. The power supply is generally a three-phase four-wire system. If the neutral wire is in poor contact or there is no neutral wire, the zero potential of the air compressor will be high. At this time, if the grounding is poor, you may feel an electric shock. ; If there is no neutral line, an isolation transformer needs to be added between the control system power supply and the power supply. 4. If the cable or control line and the neutral line are connected or virtually connected, the air compressor shell will be electrified. This situation is quite dangerous and needs to be carefully checked. The circuit may be burned out, or an electric shock accident may occur.