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Common causes of failure to prevent and eliminate the motor does not start No input power connected to the power supply disconnection or poor wire contact Change the wire or wire properly connected to the power supply voltage does not match or low voltage Check the voltage with the instrument thermal protection action (ambient temperature is high or use Frequency high) Decreases ambient temperature and reduces frequency of use or sensitivity Power capacitor is broken Replace power capacitor Error in input signal Replace input signal Self-stop on automatic operation Overload protection due to excessive load Check control valve Eliminates overload Thermal protection action and The same control valve inside the same bite foreign objects even manual operation is also very laborious, remove the valve packing gland over tightening try to loose gland manual operation laborious filling gland over tightening try loose gland valve accidental removal valve check Not showing the opening signal Opening signal line Poor contact or open wire Check the opening signal line connection signal does not reach the fully closed potentiometer Bad installation Check the installation of the potentiometer Limit switch Motor does not stop the upper and lower limits Given cam Poor adjustment and adjust the stopper bad contact more Change limit switch control sensitivity Decrease motor torque Decrease motor voltage Inspect the voltage with the instrument to make it normal Low or inconsistent supply voltage High sensitivity of oscillation Adjust sensitivity Potentiometer to reduce sensitivity Common causes of malfunctions Prevention and remedies Motor does not start No Input power connected Power supply disconnection or poor wire contact Change the wire or correctly connected to the wire Power voltage does not match or low voltage Check the voltage with the instrument Thermal protection action (ambient temperature or high frequency of use) Reduce the ambient temperature and reduce the use of frequency or sensitivity Power Capacitor is broken Replace Power Capacitor Input Signal Error Replace Input Signal Select Stop Automatically Overload Due to Overload Protection Check Regulating Valve Eliminate Overload Thermal Protection Action Same as above Biting Foreign Objects in Control Valve Even Manual Operation Very strenuous, disassembly valve packing gland over tightening try to loose gland manual operation laborious filling gland over tightening try to loose gland valve accidental removal inside the valve check did not show the opening signal opening signal line contact bad or off Line check open The signal line connection opening degree signal does not reach the fully closed potentiometer badly installed check the potentiometer installation limit switch motor does not stop the upper and lower limit given cam adjustment is poor readjust the limiter poor contact replacement limit switch control sensitivity reduce the motor Torque to reduce the motor voltage Insufficient voltage with the instrument so that the normal power supply voltage is low or inconsistent Oscillation sensitivity is too high Adjust the sensitivity potentiometer to reduce the sensitivity
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