14 – 9
Section 14
•
Slide Calibration
Vission 20/20 • Operation and Service Manual • Emerson • 35391SC 2.7
Table 14-2. Slide Valve Troubleshooting Guide (3 of 3)
Problem
Reason
Solution
The motor willl not move in either direction
The thermal switch has tripped
because
the motor is overheated
The motor will resume opera-
tion when it cools. This could be
caused by a malfunctioning con-
trol panel. Consult the factory.
Any of the reasons listed in “The
motor operates in one direction
only”
See above.
The command shaft is jammed.
Free the command shaft.
Broken gears in the gear-motor. Replace the actuator.
Blown relays or fuses.
Check and replace blown relays
and/or fuse
The motor operates intermittently, several
minutes on, several minutes off.
Motor is overheating and the
thermal switch is tripping.
This could be caused by a mal-
functioning control panel. Consult
the factory.
The motor runs sporadically
Bad thermal switch.
Replace the actuator.
Any of the reasons listed in “The
motor operates in one direction
only”
See above.
The motor runs but output shaft will not
turn.
Stripped gears inside the gear
rotor, or the armature has come
unpressed from the armature
shaft.
Replace the actuator.
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