Technical information

12/01/02
Although it is common practice to install a larger fuse dur-
ing service diagnosis, you should not leave a larger fuse in
the unit when you leave the site. This could cause a seri-
ous unit failure.
3. MISWIRING
Is gear motor wired correctly and wire connections tight.
Check the wiring diagram for the proper wiring.
4. BIN CONTROL SWITCH DOES NOT OPERATE
Check the bin control operation. A bad or miswired bin
control can cause ice to back up in the spout and chute and
cause higher gear motor amperage. Is Bin Control wired
correctly and are the wire connections tight.
Make sure there are no metallic components interfering
with the magnetic bin control. Verify top panel is non-mag-
netic. Assure that the proximity switch is mount properly.
The switch must be secure and mounted level to the chute
top. Does the
Bin Control Paddle move freely and is it
unobstructed?
As you can see, there are many factors that can cause a
gear motor to fail. A gear motor check list comes with a
service replacement part. The check list can be used as a
diagnostic tool. If the gear motor is under warranty, the
checklist should be completed and submitted with the war-
ranty claim.
GEAR MOTOR STRESS
When looking for the cause of a gear motor failure, you
should consider anything that will add stress to the assem-
bly. Stress on the gear motor will increase the gear motor
amperage and torque. The most common causes for stress
is scale on the auger surface and evaporator walls. Scale
nsulates the evaporator walls and causes reduced heat
transfer. As a result, the ice will be wet and mushy. This
poor quality ice does not extrude well and tends to pack in
the evaporator outlet.
Heavy scale build up must be removed using an acid based
cleaner which will loosen the scale. Follow the cleaning
instructions provided on the cleaning label to preform a
maintenance cleaning. If the unit has not been cleaned and
maintained frequently, it may require you to pull the auger
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12/20/03
2/20/03