What is the first thing you should check when troubleshooting a motor starter?
To conduct the tests, break the motor connections and test first in one direction (the motor) and then in the other (the supply). For the motor, test the stator winding resistance phase-to-phase and phase-to-ground. If you find a phase-on-phase short, the motor needs evaluation for a rewind or for replacement.
Why is my motor starter not working?
Disconnect the motor starter contactor coil and check for a short, ground or open circuit. If a short or ground is found, replace the motor starter contactor coil and start the motor. … Then reconnect the motor starter coil, overload circuit and field wiring, restore incoming power and start the motor.
How do I check for a bad starter?
Bad starter symptoms include:
- A grinding noise. If the starter drive gear is worn out or does not properly engage, then you will hear a grinding sound. …
- Freewheeling. …
- Smoke. …
- Oil Soak. …
- Broken Solenoid.
How do you troubleshoot a motor overload?
Check the motor starter contactor, the fuses, and the overload relay. 4) Rectify the root cause of overload and reset the overloads by push the reset button. Start the motor and check the running motor amps and compare to rated FLA and overload heater size using a clamp-on ammeter.
How do you test a motor starter relay?
Disconnect the voltage source from the circuit and remove the relay from the circuit. First check the relay’s coil by placing the leads of the ohmmeter across the 2 and 5 terminals of the relay. If the ohmmeter reads a high resistance (approximately 3,000 to 18,000 ohms) the coil of the relay is electrically OK.
Can starter motor be repaired?
Usually, auto electric shops can rebuild or repair a starter with a bad armature, shorted field windings, bad brushes, a bad commutator, or even a bad solenoid if there is no alternative. Be prepared to wait a few days or more.
What does it mean when you turn your key and nothing happens?
If nothing happens when you turn the ignition key to the “Start” position, it means that the starter motor doesn’t turn over the engine. Most commonly this could be caused by a dead battery; read above How to check the battery. … The ignition switch could be bad – it’s a common problem.
How do you troubleshoot a 3 phase motor?
How to Troubleshoot a 3-Phase Electric Motor
- Take input voltage to the motor using the volt ohmmeter. …
- Examine the motor’s electrical connections and terminals. …
- Remove motor voltage and disengage the motor from the machine that it is running. …
- Check the motor for heat or burnt smell.