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Table 10-1 provides information on symptoms, possible causes, and the suggested corrective action for
controls without optional forward-brake-reverse switch installed.
Table 10-1 Troubleshooting Guide for Controls without Optional Forward-Brake-Reverse Switch Installed
Symptom
Possible Cause
Suggested Corrective Action
Motor is not running and
Pilot Light not illuminated.
On/Off AC Line Switch in “Off”
Position.
Set On/Off Switch to “On” Position.
Blown Line fuse.
Replace Line Fuse. See Table 4-2.
Defective On/Off AC Line Switch,
Replace On/Off AC Line Switch.
Motor does not run and
Pilot Light is illuminated.
Main Speed Potentiometer set fully
counterclockwise.
Rotate Main Speed potentiometer
clockwise.
Defective motor.
Check for defective motor, worn
brushes, etc. Replace motor, if
necessary.
Plug-In Horsepower Resistor
®
not
installed.
Install the correct Plug-In
Horsepower Resistor
®
. See Table
4-3.
Blown Armature Fuse.
Replace Armature Fuse. See Table
4-2.
CL Trimpot set fully
counterclockwise.
Set CL Trimpot, as described in
Section 7.
Motor hums, runs at very
low speed, or slows down
substantially when load is
applied.
Low AC line input voltage.
Check AC line input voltage.
