26 Troubleshooting
Problem
Possible Cause
Corrective Action
4. Erratic motor
performance.
1. Worn or damaged
motor: worn brushes,
etc.
2. Overload condition.
3. Plug-in Horsepower
Resistor
®
wrong size.
4. IR comp and/or CL
trimpots not set
properly.
5. Defective or damaged
speed control
module.
6. Dual Voltage Switch
set in wrong position
1. Repair motor.
2. Remove overload.
3. Replace Plug-in
Horsepower Resistor
®
with proper size.
4. Readjust trimpots.
5. Replace module.
6. Recheck line voltage
and set Dual Voltage
Switch to proper
position, 115 or 230.
5. Motor continues to
run when speed
control knob is set to
zero (0).
1. Minimum speed trim
pot not set to full
counter-clockwise
position.
2. IR comp trim pot set
too high.
1. Readjust minimum
speed trim pot.
2. Lower IR comp trim
pot setting.
6. Motor runs in wrong
direction.
Motor is reversible
and direction of
rotation is determined
by Directional
Selection Switch.
Set Directional
Selection Switch to
FWD or REV as
required to obtain
desired rotation
direction.
Be sure to
slow table rotation
and set switch to
BRK to stop table
before changing table
rotation to opposite
direction.
Summary of Contents for TT Series
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