Fault 1: The fluorescent lamp in the equipment room suddenly blinks, the air compressor stops, the running indicator does not light, and the power indicator light is on. Troubleshooting: In this case, press the start button directly to start the air compressor. Because the electrical components of the air compressor are sensitive, when the voltage fluctuates instantaneously (only the fluorescent lamp will blink, the TV and the oxygen generator do not respond, normal operation) will automatically stop. Just press the start button directly. Fault 2: The air compressor suddenly stops when it is running, the running indicator is off, and the power indicator is off. Troubleshooting: The incoming voltage is 384V, which is normal. One suspect is that there is a problem with the computer, and the other is that there is a problem with the line. Based on the principle of simple and complicated first, along the line detection, it is found that the auxiliary contact of the contactor K1 is in poor contact, and the auxiliary contactor is replaced, and everything is normal. Fault 3: The air compressor suddenly stops when it is running, the running indicator is off, and the power indicator is on. Troubleshooting: Doubt and fault are the same, press the start button directly, the air compressor is running normally. Later, this fault became more and more frequent, and it was detected along the line, and no abnormality was found. Suspected that the computer is bad, and the computer is replaced with another air compressor, the fault remains, it seems that it is not a computer failure. After careful inspection, the green indicator of the phase sequence protector sometimes does not illuminate when tapped lightly. Contact the company, the phase sequence protector offers more than 5,000. Do it yourself, disassemble it, and find that the front panel and the circuit board are soldered, re-welded, and everything is normal after installation. Fault 4: The air compressor suddenly trips when it is running. Trouble-shooting: Open the casing of the machine, smell a burning smell, carefully inspect the external components, and there is no obvious burning damage. Touching the motor by hand, it is found that the motor is overheated, and it is suspected that the motor coil is burnt. Remove the motor and disassemble it. It turns out that the coil is burned. After replacing the coil, everything is normal. Fault 5: The air compressor suddenly trips when it is running. Troubleshooting: Open the casing and carefully inspect the external components without obvious signs of burnout. Press the start button directly, the air compressor runs, but when it is just loading, the insurance trips again. Use a multimeter to check that the motor coil is normal. During the inspection, it was suddenly found that when the contactor K2 was not energized, a contact was connected. Careful inspection revealed that the auxiliary contactor shell was broken and the debris jammed the contacts, making them incapable of returning. Because the motor is three electric Y! When starting, when the motor coil is still connected to the Y-type, there is already a type of motor coil that is turned on, the current is increased, and the fuse is tripped. Replace the auxiliary contactor and everything works. The oscillating crystal body is damaged or frequency-shifted, which is easily overlooked. It has been proved that the failure rate is not small and can be replaced. 3 about the CPU circuit. The CPU is operating in a low voltage state, and it is rare for the CPU manifold itself to malfunction. Grasp the following conditions necessary for the normal operation of the CPU to check: (1) power supply; (2) clock oscillation circuit; (3) reset circuit; (4) line, field-level feedback pulse circuit; (5) relevant The tact switch is internally short-circuited; (6) the bus manifold connected to it, and one of the integrated blocks is damaged. 4 about the protection circuit. The display protection circuit has a protection circuit for the power supply part, a line output level X-ray protection circuit, and related components are damaged, and the display is often black. There are a few monitors that have a blackout on the output stage of the display field because the stage has a protection circuit that causes the display to be black. In short, although the reasons for the occurrence of black screens are various, as long as the operating principle of the display is carefully checked according to the maintenance work flow and carefully analyzed, the display can be repaired. Cement Manufacturing Equipment
There are mainly two different processes for cement making, wet cement production line and dry cement production line, however dry type cement manufacturing process is more popular nowadays, and there are two solutions for dry cement manufacturing process, one solution is with vertical shaft kiln and the other is with Rotary Kiln, generally speaking A complete cement production line mainly includes three processes: raw material preparation, calcination process, clinker grinding and packing process, and the main cement production equipment consists of crusher, raw mill, rotary kiln, cooling machine, Cement Ball Mill, packing machine, Dust Collector, Belt Conveyor , bucket elevator, and so on. the capacity ranges from 50-3000 tpd.
Cement Manufacturing Equipment,Cement Machine,Cement Brick Making Machine,Cement Plant Equipment Henan Mingyuan Heavy Industrial Machinery Company Co., LTD. , https://www.heavyequipmentchina.com
Analysis of problems in new air compressors
With the development of the hospital, more and more hospitals have adopted the central oxygen supply system. In 2002, our hospital purchased the double-machine redesigned ASA-250PSA oxygen system. After so many years of operation, we insist on regular maintenance, maintenance and cleaning of the oxygen system, and the oxygen system rarely fails. However, some faults sometimes occur. The following describes the electrical faults and maintenance procedures of the air compressor as follows for your reference.