Inspection and replacement of electrical components of three-in-one drinking water filling equipment

Let's talk about the inspection and replacement of electrical components in three-in-one drinking water filling equipment :

1. Inspection and replacement of the detection switch, one is the proximity switch, one is the photoelectric switch. If it is suspected that there is a problem, firstly check it manually. If the corresponding point on the PLC is normal, you have to find other reasons, if not The reaction has to be replaced. There is also a case where the manual detection switch responds, but the control point is not working properly. It may be broken.

2. If some of the motors of the equipment are started without starting any button, there are two cases. One is that the contact of the PLC is broken, and the other is that there is a problem with the related electrical equipment of the control motor.

3. If the action of the cylinder or the pneumatic valve is not normal under other reasons, the solenoid valve must be inspected, and the manual action is forced. If the action is not normal, and the coil reacts normally, the cylinder can be replaced normally.

4. If the motor is always thermal protection alarm, first check if there is any jam in the conveyor chain, whether the pump is hot or not, whether the foreign object is blocked, whether the pump is idling, and then check whether the power supply is out of phase, whether the intermediate relay is short-circuited, whether it changes. The three-phase connection method, and then the current of the large breaking relay.

5. PLC has output without input or input without output, first check 24V power supply and 110V power supply, then look at the PLC indicator light, usually it is caused by detecting switch short circuit, you must find out which one, remember before it appears There are those anomalies, so start from it and find out the cause of troubleshooting.

6. PLC has neither output nor input, but also check 24V and 220V power supply first. If there is no problem with the power supply, the PLC power supply is burned and needs to be replaced. It is also necessary to check whether there is a short circuit.

7. When installing and disassembling the PLC cable, be sure to pay attention to the COM point of the PLC. The input and output are generally 24V. The output has 24V and 220V. It must be seen in the drawings. Different COM points control different output voltages. Once the error is connected, the consequences are unimaginable.

8. When replacing the detection switch of the three-in-one drinking water filling equipment , you must first remember the previous wiring method. In addition, the proximity switch has the distinction of normally open and normally closed. Zui is better to change the same model. Have to modify the program, they also have 24V and 220V points after zui, you must see clearly before changing.