Concrete Pump Motor Cannot Start Failure and Solutions
A Concrete pump motor cannot start fault is commonly seen in concrete pump motor system. It refers to the inability of a motor to start and run as it should. There are many causes and solutions to this common fault. Some of the most common causes and solutions are discussed in detail below.
1. Poor Contactor and Starter Circuit Operation
When a concrete pump motor cannot start, the first thing to check is the contactor and starter circuit operations. The contactor and starter circuit should be checked for proper connections, clean terminals and resistance readings. Incorrect connections in the circuit and poor connections on terminal block and/or receptacle caused by corrosion should be fixed. In addition, voltage should be checked at the contactor terminals to ensure that the correct voltage is being supplied to the contactor. If these steps do not resolve the problem, the contactor should be checked for proper operation or replaced.
2. Overload Device or Heater Fuses
If the contactor and starter circuit does not resolve the problem, the next step is to check the overload device or heater fuses. Overload devices and heater fuses are designed to protect the motor from excess current and damage due to an overload. A blown overload device or heater fuse is a common cause of a concrete pump motor not starting. To fix this, the overload device or heater fuse should be replaced with a new one of the same rating.
3. Failure of Motor Components
The failure of motor components can also be a cause of a concrete pump motor not starting. The most common motor components to fail are the capacitors, windings and bearings. If the motor appears to be in good condition, the capacitors, windings and bearings should be inspected for signs of wear, corrosion or damage. If any of these components appear to be damaged, they should be replaced.
4. Loose or Faulty Wiring
Checking for loose or faulty wiring is another important factor to consider when diagnosing a concrete pump motor not starting. Loose cables and terminals, insulation failure, or other wiring faults can cause a motor to short out and not start. To fix this issue, any loose, faulty or corroded wiring should be replaced or repaired.
5. Low Voltage
Finally, if the contactor and starter circuit, overload device or heater fuses, and motor components are all in good condition, the last step is to check the voltage supplying the motor. Voltage should be checked at the contactor terminals and at the motor as well. If the voltage is low, the motor will not start.
In conclusion, when a concrete pump motor cannot start, there are a few common causes and solutions. The first step is to check the contactor and starter circuit operations. Next, the overload device or heater fuses should be checked and replaced if necessary. Motor components such as capacitors, windings and bearings should be inspected and replaced if necessary. Loose or faulty wiring should be inspected and repaired if necessary. Finally, the voltage supplying the motor should be checked and increased if necessary.
