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