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SERVICE
NOTE: All service should be performed by a Manitowoc
Service Representative.
TROUBLESHOOTING
TROUBLE
POSSIBLE CAUSE
CORRECTIVE MEASURES
Dispenser will not dispense
Bin empty.
Fill manually or check ice machine operation.
ice.
Large clusters of ice in bin.
Check and adjust ice bridging. Do not use
bagged ice, or be sure ice is broken up before
putting in dispenser.
Ice jammed in ice chute opening.
Check and clear opening.
Defective switch.
Check and adjust or replace.
Drive belt broken or loose.
Tighten or replace.
Drive motor defective.
Check or replace motor. Check start capac¬
itor or replace. Check electronic motor
starting switch or replace.
Drive motor operates, but
doesn't turn.
Auger not properly seated on lower
bearing drive shaft.
Check and reseat correctly.
Keys not in place on shafts.
Replace Key.
Belt loose. (If belt is loose, you will hear a
ratcheting noise.)
Grease base under tensioner bracket. Verify
wedge is located under gear box.
Defective gear
Check and replace reducer.
Motor running continuously.
Ice jammed in door opening.
Clear door. This can usually be done by
dispensing a glass of ice.
Switch.
Adjust or replace.
Fig. 8
3. Positive Drive Belt
10. Large Pulley Assembly
36. Gear Box Angle Bracket
75. Spring — Belt Tightener
76. Bracket — Spring Belt Tightener
BEARING ASSEMBLY REMOVAL
1. See Auger and Agitation Drive Assembly Removal to
gain access to lower bearing and drive shaft assemblies.
2. Loosen belt by loosening the belt tensioner and remove
the belt (refer to Belt Tightening and Replacement).
3. Remove lower bearing drive pin and the plastic drive
coupling on the agitator drive shaft (see Fig. 10).
4. Remove three bolts that hold the upper bearing housing
assembly to the lower bearing housing assembly.
Note:
Bolt heads are #7 Torx head and have been filled with
silastic that should be cleaned out to insure good
wrench engagement.
5. Withdraw the three bolts from inside the bin and lift
upper bearing assembly out of dispenser.
6. Withdraw the lower bearing assembly from the gear-
and-motor compartment side.
BEARING ASSEMBLY INSTALLATION
1. Install upper drive shaft housing assembly gasket to
insure a water-tight seal between upper bearing
housing and cold plate. Then position bearing assembly
in bottom of bin.
2. From inside the bin, insert the three mounting bolts
through the upper bearing housing. Use food grade
silastic under the bolt heads to insure no water leakage.
3. Install the lower bearing housing and shaft from the
gear-and-motor drive compartment side.
NOTE:
Start all three bolts and tighten together to assure
alignment. Tighten to 95 ±5 in.-lbs. of torque.
4. Insert the pin into the lower bearing drive shaft and insert
the bolt and washer. The plastic drive coupling must
be replaced on the agitator drive shaft.
5. Install the auger and agitator assemblies (refer to Auger
Assembly).
TROUBLESHOOTING ELECTRONIC START WINDING
SWITCH
Item 57 (Sinpac Switch), Fig. 12 (see Wiring Diagram, Fig.
9)
This device switches the start winding in and out of the
circuit.
This device replaces the mechanical/centrifugal switch on
the Vt, hp capacitor start motor. The electronic switch (Item
57) monitors the voltage wave forms across the start
winding. The wave form displays a slight dip followed by
a rise at the motor shaft speed where proper switch
operation should occur (75-80% of synchronous speed).
The electronic switch will usually fail with the switch (Triac)
in the open mode (nonconducting). If the motor won't start
and run, the switch can be tested by momentarily jumping
the device across terminal number 3 and 2. This will engage
the start winding.
7
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