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MAGNETS AND OTHER MECHANICAL PARTS <br />Trouble <br />Cause <br />Remedy <br />Worn or Broken <br />1. Too much cycling. <br />1. Replace part and correct cause of <br />Parts <br />Dust & dirt or <br />damage. <br />mechanical abuse. <br />Noisy Magnet <br />1. Defective coil. of <br />1. Replace <br />current <br />(Humming) <br />2. Magnet faces not <br />2. Replace magnet assembly. Removing <br />mating correctly. <br />magnet armature and rotating 180 degrees <br />may reduce hum. <br />3. Broken or missing <br />3. Replace magnet assembly. <br />shading coil. <br />4. Dirt, oil, or foreign <br />4. Clean magnet faces with carbon <br />matter on magnet faces. <br />tetrachloride. <br />5. Low voltage. <br />5. Check system voltage and voltage dips <br />during starting. <br />Failure to Pickup and <br />1. Low voltage <br />1. Check system voltage and voltage dips <br />/ or seal. <br />during starting. <br />2. Coil open or shorted. <br />2. Replace coil. <br />3. Wrong coil. <br />3. Check coil voltage rating which must <br />include system nominal voltage & <br />frequency. <br />Failure to Pickup and <br />4. Mechanical <br />4. With power off, check for free movernent <br />or seal. <br />obstruction <br />of contact and armature assembly. <br />Remove foreign objects or replace <br />contactor. <br />5. Poor contact in <br />5. Check and correct. <br />control circuit surface. <br />Failure to Drop Out <br />1. Gummy substance on <br />1. Clean with carbon tetrachloride. <br />pole faces, or in <br />mechanism. <br />2. Voltage not removed <br />2. Check control circuit. <br />from control circuit. <br />3. Worn or rusted parts <br />3. Replace contactor. <br />causing binding: e.g., <br />coil guides, linkage, etc. <br />4. Residual magnetism, <br />4. Replace contactor. <br />due to lack of air gap in <br />magnet path. <br />5. Improper mounting of <br />5. Review installation instructions. <br />starter. <br />