Troubleshooting
Symptom
Possible Solution
Fan Motor Does Not Start
Confirm proper incoming voltage on top of MR1 contactor between terminals L1 and L2 With fan switch turned on, confirm proper voltage on bottom of thermal overload terminals T1 and T2 With fan switch turned on, confirm proper voltage on bottom of thermal overload terminals T1 and T2 With fan switch turned on, confirm proper voltage on contactor coil between terminals A1 and A2 Motor is wired incorrectly. Motor can be wired for use on various voltages. Use schematic on name plate of motor to properly connect motor to voltage being applied. Motor is overloaded. Use amp meter to determine if motor is pulling too many amps based on motor name plate. Remove belts from motor and attempt to run with no belts. Thermal overload is adjusted incorrectly. Determine the FLA (full load amps) of the motor by checking the motor name plate (ensure the voltage being applied to the motor is known). Adjust the thermal overload to match the motor nameplate. Motor is overloaded. Use an amp meter to determine how many amps the motor is pulling then compare that number to the thermal overload and motor name plate. Incorrect voltage applied between terminal A1 and A2 on contactor coil. Use a volt meter to confirm the voltage on those terminals matches what is printed on the coil.
Fan Motor Starts But Makes Humming Noise
Fan Motor Runs For A Few Moments Then Turns Off.
Motor Starter Makes Buzzing Noise When Turned On
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