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Diagnostics and Service Information
The following checks can be made by removing the
control panel:
Motor Start Windings
Remove the red and yellow wires from the
directional switch and connect an ohmmeter to the
wires. Ohmmeter should read 3.4 to 4.6 ohms.
If the ohmmeter shows an open circuit, the start
windings are open and the motor must be replaced,
or the yellow or red wire is broken or disconnected
at the motor.
Tilt Switch (drawer)
Remove the wires from the tilt switch (drawer) and
connect an ohmmeter between the two terminals.
Refer to the wire schematic for the position of the
switch contacts.
Move the drawer in, the switch is closed. Move the
drawer out, the switch is open.
Tilt Switch
Remove the black wire from the tilt switch. Remove
the orange wire from ON-OFF switch. Connect an
ohmmeter to the black wire and orange wire. Press
and release switch several times.
Press the switch, and the switch is closed. Release
the switch, and the switch is open.
On-Off Switch, Top Limit-Directional Switch
To test each switch, remove the wires from the
switch and connect an ohmmeter between the two
terminals. Refer to the wire schematic for position of
the switch contacts.
Motor Run Winding
1. Remove the blue wire from the start switch, and
the blue wires from the top limit switch and the
directional switch.
2. Connect an ohmmeter to the blue wire and to
the neutral side of the power cord.
3. An accurate ohmmeter should read about
1.2-1.6 ohms.
Motor Centrifugal Switch
1. Disconnect the wires from the motor centrifugal
switch.
2. Connect an ohmmeter to terminals.
3. The ohmmeter should read 1 ohm or less. If
the circuit is open, the motor switch is stuck or
burned. Motor must be replaced.
PROBLEM
CAUSE
Unit Dead
Not plugged in
No power to the outlet
Tilt switch (drawer) contacts open
Tilt switch contacts open
Motor windings open
ON-OFF switch contacts open
Unit won't keep
running
Top limit switch contacts open
Centrifugal switch contacts open
Unit doesn't stop
Start switch contacts fused
Top limit switch "on"
Out of adjustment (Switch arm
deformed)
Contacts fused
Unit oscillates up
and down
Motor centrifugal switch contacts fused
Unit makes
humming noise
Mechanical jam
Start winding not energized
Winding open
Motor centrifugal switch contacts
open
Run winding open
Electrical Troubleshooting Guide
COMPACTOR CYCLE
Start*
Downward
Travel
Reverse
(Stall)
Upward
Travel
End of
Cycle**
Red - Blue
Yellow - Blue
*First 3/4" (19 mm) of downward travel = Closed
**Last 3/4" (19 mm) of upward travel
Directional Switch Chart
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