Diagnostics And Service Information - GE GCG1500BB Technical Service Manual

Diagnostics and Service Information

Electrical Troubleshooting Guide
PROBLEM
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 Top limit switch contacts open

running
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 Motor centrifugal switch contacts fused

and down
Unit makes Mechanical jam

humming noise
Start winding not energized

Winding open

Motor centrifugal switch contacts

open
Run winding open

Directional Switch Chart
COMPACTOR CYCLE
Start* Downward
Travel
Red - Blue
Yellow - Blue
*First 3/4" (19 mm) of downward travel
**Last 3/4" (19 mm) of upward travel
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.
CAUSE
Reverse Upward End of
(Stall) Travel Cycle**
= Closed
– 23 –
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.
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