Malfunction Symptoms | Cause of Issue | How to handle |
The motor won't start, but it can run after manual operation | 1. The centrifugal switch is in poor contact. 2. The starting coil is short-circuited or poorly connected. |
1. Replace the centrifugal switch or sand its joints with sandpaper. 2. Check whether the pneumatic coil is broken. |
The motor cannot be started, and it also cannot run after manual operation. | 1. There is no power supply. 2. The circuit is disconnected. 3. The running coil is disconnected. 4. The shaft is bent. 5. The rotor is in contact with the stator. |
1. Check the power supply. 2. Check the circuit. 3. Repair the running coil. 4. Adjust or replace the shaft. 5. Replace the bearing. |
Speed is slower than normal speed. | 1. The power supply voltage is too low. 2. The bearing is too tight, or the load is too large. |
1. Check whether the power supply voltage is normally supplied. 2. Replace the bearing to reduce the burden. |
Overheat | 1. Overload. 2. The coil is short-circuited. 3. The coil is grounded. 4. Short circuit between the running coil and the starting coil. 5. The bearing is seriously worn. |
1. Lighten the burden. 2. Check the short-circuit point and then insulate it. 3. Isolate the ground point. 4. Check the short-circuit point and then insulate it. 5. Replace the bearing. |