An air pump is not switched on and the voltage is normal
Is the pressure inside the air pump adequate? Look at the pressure gauge.Can you make sure that the motor is good?Check the pressure relay, and the normally closed electric shock is broken. (through normal)Is the contactor coil all right? Take the meter. (through normal)Is the heat relay broken? (through normal)
Do not only measure the voltage, such as lines too long or there is a virtual place, the voltage is not enough, the starting current increases, the line loss increases, the voltage of the pump is not enough. You can measure the voltage when you start the pump. If the voltage is not a problem, use the meter to measure the pressure relay, that is, whether the voltage control is normal or not. If the voltage control is normal, you should see if the motor coil is burned. In addition, the single-phase pump should pay attention to the capacitor, three-phase should pay attention to contactor is normal.
After the motor is energized, the following reasons may not be possible:1, power supply missing phase, including switch or contactor, at least one phase contact bad or broken line, at this time the motor will have buzz.2. If there is no movement, check to see if the electricity is delivered;3, whether the mechanical part of the locking conditions, limit start, etc..
