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CMP 600-30
ICE MAKER DISPENSER
Service Manual
Part No. 630460050SER
March 3, 2004
Revision: A
THIS DOCUMENT CONTAINS IMPORTANT INFORMATION
This Manual must be read and understood before installing or operating this equipment
IMI CORNELIUS INC; 2004
PRINTED IN U.S.A
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TABLE OF CONTENTS
SAFETY INFORMATION 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RECOGNIZE SAFETY INFORMATION 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNDERSTAND SIGNAL WORDS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOLLOW SAFETY INSTRUCTIONS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION INSTRUCTIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ICEMAKER CLEANING AND SANITIZING PROCEDURES 6. . . . . . . . . . . . . . . . .
MAINTENANCE 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MONTHLY 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
QUARTERLY 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SEMI–ANNUALLY 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER LEVEL CONTROL 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HOW WATER LEVEL CONTROL WORKS 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PURPOSE OF WATER LEVEL CONTROL 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TO REPLACE WATER LEVEL CONTROL 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TO REPLACE WATER LEVEL SAFETY SWITCH 8. . . . . . . . . . . . . . . . . . . . . . . . . .
ICE LEVEL CONTROL 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REFRIGERATION SYSTEMS 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page
REFRIGERATION SYSTEM ADJUSTMENTS 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXPANSION VALVE 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENT AND TROUBLESHOOTING 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEMPERATURE / PRESSURE CHARTS * 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONDENSER MODULATING VALVE (WATER COOLED ONLY) 10. . . . . . . . . . . .
CONDENSER MODULATING VALVE REMOVAL 11. . . . . . . . . . . . . . . . . . . . . . . . . .
GEAR MOTOR 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING GEAR MOTORS 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE GEARMOTOR WILL NOT RUN 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE GEARMOTOR STARTS BUTS TRIPS REPEATEDLY ON THE
OVERLOAD PROTECTOR: 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE MOTOR RUNS BUT OUTPUT SHAFT DOES NOT ROTATE: 12. . . . . . . . . . .
OVERLOAD CHECK: 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MOTOR CHECK: 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION AND SHAFT SEAL REPLACEMENT) 13. . . . . . . . . . . . . . . . . . . . . .
AUGER & EXTRUDING HEAD REMOVAL 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TO REPLACE BEARINGS 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING COMPRESSOR 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL CHECKOUT 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OVERLOAD CHECK 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPRESSOR CHECK 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CAPACITOR CHECK 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONTROLS 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GUIDE TO GOOD ICE 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TABLE OF CONTENTS (cont’d)
TROUBLESHOOTING CHART – ICEMAKER NOT OPERATING 18. . . . . . . . . . . . . . . .
WARRANTY 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF FIGURES
FIGURE 1. WATER RESERVOIR 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 2 SCHEMATIC DIAGRAM 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 3. AUGER ASSEMBLY 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 4. ADJUSTMENT SCREW 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 5. OUTPUT SHAFT 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 6. SHAFT SEAL REPLACEMENT 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 7. EXTRUDING HEAD 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 8. AUGER 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 9. UPPER NUT AND BEARING 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 10. ELECTRICAL BOX 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 11. GEAR MOTOR THERMAL OVERLOAD 16. . . . . . . . . . . . . . . . . . . . . . .
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SAFETY INFORMATION
Recognize Safety Information
This is the safety-alert symbol. When you see this
symbol on our machine or in this manual, be alert to
the potentially of personal injury.
Follow recommended precautions and safe operating
practices.
Understand Signal Words
A signal word - DANGER, WARNING, OR CAUTION
is used with the safety-alert symbol. DANGER identifies the most serious hazards.
DANGER
Safety signs with signal word DANGER or WARNING
are typically near specific hazards.
General precautions are listed on CAUTION safety
signs. CAUTION also calls attention to safety messages in this manual.
WARNING
CAUTION
Follow Safety Instructions
Carefully read all safety messages in this manual and on your machine safety signs. Keep safety signs in
good condition. Replace missing or damaged safety signs. Learn how to operate the machine and how to
use the controls properly. Do not let anyone operate the machine without instructions. Keep your machine in
proper working condition. Unauthorized modifications to the machine may impair function and/or safety and
affect the machine life.
CAUTION: Very high discharges pressure is present in system. Quick disconnects on your
gages will minimize danger and loss of refrigerant.
CAUTION: Unit requires separate electrical line. See instruction manual for proper fuse
size.
WARNING: There must be adequate clearance around ice maker. Allow minimum 6” air
intake and 4” air exhaust for air exhaust and panel removal.
NOTE: Unit must be installed per local plumbing and electrical codes. See Installation manual for
unit requirements. Failure to do so may cause damage to unit, which would void unit warranty.
NOTE: Using any parts other than genuine factory manufactured parts relieves the manufacturer of all
liability.
NOTE: Manufacturer reserves the right to change specifications at any time.
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SPECIFICATIONS
Cond.
Model
CMP600–30A Air Cooled 115 60 1 2 12 1 2 28 R404A 20
Unit VAC Hz. Ph. Wire
Comp.
RLA
Fan
Amps
GrmtrA
mps
Refrig.
Oz. Type
INSTALLATION INSTRUCTIONS
1. REMOVE ICEMAKER FROM CARTON:
A. Keep unit in the upright position, remove carton and pallet from unit and inspect unit for damage.
Upon inspection of unit, if any damage is found, file a claim with carrier immediately.
B. Locate Startup Card either on outside of container or on plastic liner. Fill in proper information and
send one copy to factory, and other copy to Distributor. Postage is prepaid.
2. PREPARATION OF INSTALLATION SITE:
A. The refrigeration system on air cooled units requires airflow, so a well ventilated area should be
chosen. A minimum of (6) inches must be maintained, free of any obstruction, for air intake. A
minimum of (4) inches clearance is required for air exhaust.
3. WATER INLET HOOK–UP:
A. Water Inlet – Fitting is a 1/4” SAE male flare located at the left rear bottom of the unit. Connect water
supply with a 1/4”or larger copper or flexible tubing.
B. Water Pressure – Unless otherwise specified, the unit is designed to operate on water pressures
between 10 P.S.I. and 90 P.S.I. (NOTE: for pressures above 90 P.S.I. a regulator must be installed).
C. Water Cooled Condensers
a. Inlet to modulating valve uses 3/8” FPT. Use separate 3/8” or larger water line.
Circuit
Fuse
b. Outlet is 3/8” FPT.
D. Filters – Filter/Conditioners are recommended on supply lines to icemakers. Never run the water
supply to water cooled Condenser through Filter/Conditioner, it uses up the cartridge unnecessarily
and a saturated cartridge can starve the icemaker causing premature component damage. Separate
water supplies are recommended.
NOTE: Unit must be installed per local plumbing code.
4. ELECTRICAL SUPPLY:
A. Power Access – Is provided by way of a 7/8” dia. hole in the base. Route incoming power in conduit,
to icemaker electrical control box.
B. Make connections to wires provided in control box and ground lug/screw. Plug unused hole.
C. Fused Line – Should be a dedicated circuit checked and sized according to electrical rating shown on
unit nameplate.
NOTE: Unit must be installed per local electrical code.
5. DRAIN CONNECTION:
A. Bin Drain– is a ” ID flexible tube located at the left bottom rear of the unit. Extend this line to proper
drain.
B. Overflow Line– is a 3/8” ID flexible tube located at the left bottom rear of the unit. Extend this line to
proper drain.
6. AUGER ENGAGEMENT:
Be certain that auger is fully engaged to lower drive and that extruding head is fully engaged to evaporator.
7. INITIAL START UP, CHECKS & ADJUSTMENT INSTRUCTIONS:
NOTE: Do not start unit before completing Installation steps 1–6.
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Turn on water supply and main power switch (located on top of electrical box). Make the following system
checks:
NOTE: If unit will not start be sure water reservoir is full. Low water safety control must be properly adjusted
to start and shut down unit. If water level drops below bottom of reservoir, unit must shut down. Adjustment is
made by moving magnet up or down.
FIGURE 1. WATER RESERVOIR
Water Level – If necessary adjust Float by bending float arm up or down as needed, push float assembly down
until unit stops running. Release float and unit will restart. Keep water in reservoir at level line while unit is in
operation. See Figure 1.
Low Water Safety Control – Adjust magnet by bending magnet arm as shown in figure 1 to shut down unit if
the water level drops below the line on the side of the reservoir.
Bin Control – Remove four screws from top of bin cover and lift cover so bin control plate can be manually
lifted until unit shuts down. Release plate and unit will restart (NOTE: the dispense button must be depressed
for 45 seconds before unit will start). Replace screws.
Dispense Switch and Mechanism – By depressing the dispense switch, the dispense mechanism door on the
storage bin will open, and agitator will rotate counterclockwise.
NOTE: If any of these checks or adjustments cannot be achieved, refer to Troubleshooting Section of this
manual or call our technical support center for assistance.
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FIGURE 2. SCHEMATIC DIAGRAM
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ICEMAKER CLEANING AND SANITIZING PROCEDURES
Do not use any of the ice made during cleaning operations.
Clean and sanitize ice storage area when cleaning icemaker.
1. Turn machine off.
2. Shut off water supply.
3. Remove ice from storage bin.
4. Mix approved cleaner (2 gallons as directed). Recommended cleaner: Calgon Corp. or Virginia Chemicals, ice
machine cleaner. Mixture: 3-1/3 ounces per gallon water. Do not use nickel safe cleaners.
5. Turn machine on and add cleaner solution to water level control (float reservoir) until 2 gallons have been used.
6. Turn on water supply and run machine for 15 minutes.
7. Turn off machine. Remove and discard all ice.
8. Sanitize using household liquid bleach (50 PPM chlorine). Mixture: 1 fluid ounce per gallon room temperature
water. 2 minute exposure time.
9. Sanitize pre-cleaned inside areas of storage bin liner, door frame, door, as well as exposed surfaces of the
evaporator assembly and bin shutoff assembly with sanitizing solution and allow to air dry.
MAINTENANCE
PREVENTIVE MAINTENANCE CAN INCREASE THE TROUBLE FREE LIFE OF YOUR ICE MAKER.
FAILURE TO PERFORM PREVENTIVE MAINTENANCE COULD VOID YOUR EQUIPMENT WARRANTY.
Many authorized IMI Service Agencies offer service contracts. Contact your local distributor
for further information.
MONTHLY
1. Clean the condenser. Use a brush, vacuum cleaner or blow from inside with air or CO2 gas. If unit is provided
with an air filter, clean or replace.
2. Inspect water feed reservoir at least once a month until a definite pattern for cleaning and sanitizing has been
established.
QUARTERLY
This is the maximum period of time between cleaning and sanitizing the icemaker. In addition to recommended
monthly procedure, and if a more frequent cleaning and sanitizing pattern has not been established, unit must
be cleaned and sanitized quarterly.
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SEMI–ANNUALLY
Semi–Annually in addition to all previously established service procedures perform the following:
1. Check for water leaks; tube connections, water fillings and lower icemaker water seal.
2. Check drain tubes for clogs and “aged” tubes. Replace if tubes are stained or brittle.
3. Check for signs of condensation. Clean where necessary and replace insulation properly.
4. Check safety circuits for proper operation.
5. Check refrigeration system (see Page 9).
6. Check unit for abnormal noise. Tighten machine and cabinet screws, if necessary.
7. Check white upper bearings on auger assembly. If bearings are less than 1/16” thick, replace See Figure 3.
FIGURE 3. AUGER ASSEMBLY
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WATER LEVEL CONTROL
HOW WATER LEVEL CONTROL WORKS
When water is introduced through the inlet fitting the float rises, the float pushes against a lever that in turn,
forces the poppet assembly against the inlet fitting valve seat that seals the water off. See Figure 1. Before the
water inlet is sealed, the safety switch is operated. In the event of a water failure the float would drop down and
operate the safety switch to shut off the machine.
If water level control will not shut off and seal at level as indicated, be sure inlet pressure does not exceed
recommended factory operating range.
Under ordinary circumstances adjustment should not be necessary providing it was properly adjusted when unit
was installed or relocated. If however, the control becomes inoperative, repair or replace. See Start–up
Adjustment page 3.
PURPOSE OF WATER LEVEL CONTROL
1. To automatically maintain proper water level in the evaporator when the unit is running and making ice.
2. A safety switch is operated in the event of an interruption in water supply. The switch shuts off the electrical
power to the icemaker and its refrigeration system. Switch will reset as soon as cause of water failure has been
corrected and proper water level in icemaker has again been reached.
3. The transparent bowl not only provides a visible check of water level, but also is a good guide to the internal
conditions which exist within the icemaker assembly itself. (See cleaning procedure.)
TO REPLACE WATER LEVEL CONTROL
1. Shut off the water supply. Shut off the main power switch or unplug the ice dispenser from electrical outlet.
2. Remove the flexible tubing from bottom of water level control and drain water from water level control and
evaporator.
3. Remove flexible tubing at bottom of water level bowl connected to the overflow.
4. Hold water inlet fitting with proper tool to prevent it from rotating when disconnecting the water inlet.
5. Remove wing nut holding water control to its mounting bracket. Control can be removed by lifting straight up.
TO REPLACE WATER LEVEL SAFETY SWITCH
1. Shut off main power switch or unplug the ice dispenser from electrical outlet.
2. Unplug Molex connector connecting switch to electrical box.
3. Remove the 2 screws anchoring the water level safety switch to the bottom of the water level control mounting
bracket.
ICE LEVEL CONTROL
The ice level control assembly is secured to the top of the ice storage container cover. The cover is secured to
the storage container with four screws. The level control switch is operated by a plate assembly located beneath
the diaphragm. When the plate assembly is down due to lack of ice in storage container, electrical impulse is
sent to compressor, starting the ice making cycle. As ice level increases in storage container, the plate
assembly is pushed up. When storage container is full, it deactivate the switch, stopping the compressor and ice
making cycle. The operating positions of the switch is fixed, no adjustments are necessary. If switch
replacement becomes necessary, simply disconnect cable at connector, remove wires from switch.
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REFRIGERATION SYSTEMS
REFRIGERATION SYSTEM ADJUSTMENTS
A complete understanding of the icemaker and hermetic refrigeration system is necessary before any
adjustments are made. The refrigeration technician must use high and low side pressure readings, water and air
temperatures, plus general conditions of cleanliness to assess the refrigeration system status when making any
adjustments.
All icemaker products are tested and adjusted at the factory prior to shipment where the ambient temperature
ranges from 65_F to 90_F, depending on the season of the year.
Whenever a new icemaker is initially installed and started–up, it is imperative that the start–up operator make
the following checks and readjustments for local conditions.
EXPANSION VALVE
You will find a thermal expansion valve on Wilshire ice makers, which is used to control the amount of
refrigerant flowing through the evaporator. Improperly installed or defective expansion valves may cause low
production, soft ice, squeaking from evaporator and excessive load inside evaporator.
By using general refrigeration trouble shooting along with the pressure charts, you can easily determine whether
or not the expansion valve is working properly.
ADJUSTMENT AND TROUBLESHOOTING
When troubleshooting the expansion valve, you must;
1. Be sure you have adequate water flowing into the evaporator, a clean and properly ventilated condenser, and
the system is properly charged and free of any restrictions. Also be sure compressor is operating properly.
2. Take reservoir water temperature and air temperature from condenser inlet and determine at what pressure
unit should be running. On machines equipped with thermostatic valve there is NO adjustment. If correct
pressure cannot be obtained, be sure system has time to stabilize, 10–15 minutes.
3. Be sure sensing bulb is located at outlet side of evaporator about 3–4 inches away from evaporator and be
sure to insulate well and clamp tightly to tubing. If system pressures are still not adequate, take a second water
and air temperature reading and go over other parts of the system for possible problems. If proper charge is
questionable evacuate and recharge to nameplate and leak check. If valve still malfunctions replace valve.
Use general refrigeration system practices when replacing and recharging unit. After new valve is in place, go
through previous monitored adjustments and troubleshooting to be sure valve is functioning properly.
NOTE: On water cooled units adjust condenser modulating valve before troubleshooting expansion
valve.
CAUTION: Very high discharge pressure is present in system. Quick disconnects on your
gages will minimize Danger and loss of refrigerant. Comply with federal regulations for
reclaiming refrigerant.
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TEMPERATURE / PRESSURE CHARTS *
CMP600–30
± 10 lb.
Discharge Pressure
Refrigerant
Type R404A
Air Temp. 40 65 90
NOTE: The thermostatic expansion valve is non–adjustable on all models
CONDENSER MODULATING VALVE (Water Cooled Only)
The reason for using a water modulating valve is to supply the correct amount of water to the condenser to
maintain the proper operating pressure in the refrigeration system high side. The flow of water through the valve
is increased as the high side pressure rises and decreases as high side pressure lowers.
Water Temperature
50 174 177 180
60 202 205 208
70 230 233 236
80 265 269 272
90 300 304 307
100 328 334 340
FIGURE 4. ADJUSTMENT SCREW
To calibrate the amount of water flow with the refrigeration system high side pressure, turn adjustment screw
located on end of valve opposite of bellows See Figure 4. Turn screw counterclockwise to raise opening point.
Opening point of valve should be set to maintain proper operating pressure in refrigeration system high side.
Refer to Pressure Chart on Page 10. Closing point of valve should be set low enough to close valve during
compressor stand by periods.
NOTE: Cold water will absorb more heat faster than warm water. The water flow will therefore
automatically increase as inlet temperature increases.
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CONDENSER MODULATING VALVE REMOVAL
1. Disconnect power to unit, then shut off water supply to condenser and reclaim refrigerant from system.
2. Remove inlet water line from Condenser modulating Valve. Also remove tube from refrigerant high side line.
3. Remove Condenser Modulating Valve and bracket from unit.
4. Remove valve from bracket.
5. Replace Condenser Modulating Valve by reversing Steps 2 thru 4. Then pull system into vacuum.
6. Recharge unit with refrigerant per nameplate.
7. Turn power and water On to unit.
8. With unit running adjust modulating valve to proper setting.
9. Go through a complete system check.
GEAR MOTOR
The gear motor is equipped with a start relay and a manual reset overload. When current is applied, the relay
energizes and completes the circuit to the start winding. The motor reaches a predetermined speed and the
relay drops out, disconnecting the start winding. The run winding remains in the circuit as long as current is
applied.
The purpose of the overload is to automatically shut off the motor in the event of a mechanical bind of the
transmission, an overload condition within the evaporator or an electrical malfunction. It does this by sensing
amperage draw. If the motor stalls the start relay would energize and stay energized. The amperage would
surge to 5 to 6 times greater than normal draw. In this event the overload would shut off the transmission in 4 to
8 seconds.
If the motor is subjected to an abnormal load, but does not reach stall condition, the overload will react, but over
a greater period of time. The reaction time depends upon the amperage to which it is subjected.
The overload, through the safety circuit, also shuts off the compressor.
Refer to Troubleshooting Guide.
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TROUBLESHOOTING
IMPORTANT: Only qualified personnel should service internal components or electrical wiring.
TROUBLESHOOTING GEAR MOTORS
Basically, Gear motor problems can be narrowed down to three areas of checkout.
THE GEARMOTOR WILL NOT RUN
1. No voltage to the transmission terminals – check external circuit.
2. Low voltage – check supply.
3. Problems in the gear motor electrical circuit. See Figure 5
THE GEARMOTOR STARTS BUTS TRIPS REPEATEDLY ON THE
OVERLOAD PROTECTOR:
1. Voltage – high or low voltage can cause the overload to trip.
2. High Gear motor amperage draw, see Specification Chart for ratings and Troubleshooting Guide.
FIGURE 5. OUTPUT SHAFT
THE MOTOR RUNS BUT OUTPUT SHAFT DOES NOT ROTATE:
1. Replace defective gear motor.
CAUTION: Be sure unit is disconnected from the power source. Disconnect the
transmission cable.
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OVERLOAD CHECK:
2. Allow motor to cool and reset overload if necessary.
3. Remove motor end bell and stator, if necessary.
4. Check terminals 1 and 3 on overload. No continuity replace overload. Use a volt–ohm meter. See Figures 5
and 6.
MOTOR CHECK:
The resistance readings on the windings will be between 5 to 25 ohms. A meter capable of these low readings
must be used. The Start Relay cover must be removed. NOTE: Gear motor and related components can be
checked from Pin Connector. See Figures 5 and 6.
If no continuity on start or run winding test, replace stator. If continuity on grounded motor test, replace stator.
INSTALLATION AND SHAFT SEAL REPLACEMENT (See Figure 6)
1. Place shaft seal locator seat over gear motor output shaft, embossed side down, and push down until shaft
seal seat rests flush on top of gear motor.
2. Place rubber coated ceramic seal (important: ceramic face up) over output shaft and push down until seal rests
on top of the shaft seal seat. (Lubricate rubber on ceramic seal with [#06195] rubber lubricant.)
3. Place shaft seal with carbon face down(spring up) over output shaft and push (gently) downward until seal
rests on carbon face of the output shaft seal.
4. Push down on the washer compressing the spring on the output shaft seal. While holding the seals (down) in
place slide the E–ring into the groove on the output shaft.
AUGER & EXTRUDING HEAD REMOVAL
E–RING
BEARING DELRIN
WASHER, PLAIN FLAT
SHAFT SEAL
MOUNT, SHAFT SEAL
SEAT, SHAFT SEAL
GEARMOTOR
FIGURE 6. SHAFT SEAL REPLACEMENT
ANTI–ROTATION
RIB– 3 PLACES
FIGURE 7. EXTRUDING HEAD
AUGER NUT
BEARING NYLON
GROOVE
EXTRUDING
HEAD
AUGER
“D” DRIVE
FIGURE 8. AUGER
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AUGER & EXTRUDING HEAD REMOVAL
FIGURE 9. UPPER NUT AND BEARING
The upper bearings located on top of the auger is used to absorb the force between the auger and extruding
head.
The bearings are 3/32” thick. When they wear below 1/16” they should be replaced. Bearings to be
inspected for wear during quarterly maintenance. See Figure 9.
TO REPLACE BEARINGS
1. Dispense all ice from unit.
2. Disconnect unit from electrical power.
3. Remove panels.
4. Unplug Dispense Motor and Ice Level Switch.
5. Remove four screws holding dispense cover in place.
6. Remove dispense cover assembly.
7. Use an open end wrench on auger nut connected to bearing and turn and turn counterclockwise to remove
assembly.
8. Remove worn bearings. Replace with new bearings and then reinstall assembly.
NOTE: If auger turns with nut, remove cover on top of gear motor stator and hold rotor while loosening nut.
9. Reconnect power to icemaker.
TROUBLESHOOTING COMPRESSOR
Basically the compressor problems can be narrowed down to three areas of checkout–
1. THE COMPRESSOR WILL NOT RUN
A. No voltage to the compressor terminals – check circuit.
B. Low voltage – below 90% of nameplate rated voltage.
C. Problems in the compressor electrical circuit. See Electrical Checkout instructions.
2. THE COMPRESSOR STARTS BUT TRIPS REPEATEDLY ON THE OVERLOAD PROTECTOR
A. Check for proper fan operation and clean condenser.
B. Check the compressor suction and discharge pressures.
C. Voltage – The voltage should be within 10% of the rated nameplate voltage.
D. High compressor amperage draw, it should never exceed 120% of the rated nameplate amperage.
See Electrical Checkout Instructions.
3. THE COMPRESSOR RUNS BUT WILL NOT REFRIGERATE
A. Check the compressor suction and discharge pressures. See Chart on Page 10.
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Page 18
ELECTRICAL CHECKOUT
FIGURE 10. ELECTRICAL BOX
1. Be sure the unit is disconnected from the power source. Remove the compressor electrical box cover. Check
for obvious damage and loose wires.
2. Disconnect the fan motor leads. Since capacitors store energy, short the capacitor with a screwdriver. This will
prevent shocks.
3. Disconnect the compressor terminal wires.
OVERLOAD CHECK – (See Figure 5)
4. Using a volt–ohm meter check the continuity across the overload, contacts #1 & #3. If none, wait for unit to
cool down and try again. If still no continuity, the overload protector is defective and should be replaced.
COMPRESSOR CHECK – (See Figure 10)
The resistance readings on the windings will be between 0.25 and 10.00 ohms, a meter capable of these low
readings must be used.
5. Check between ”C” & ”R.” Replace compressor if there is no continuity as the run windings are open.
6. Check between ”C” & ”S.” Replace the compressor if there is no continuity as the start windings are open.
7. Check between ”C” & ”R”, or ”S” and shell of the compressor. If there is continuity replace
the compressor as the motor is grounded.
8. Check between screw terminal on the overload and ”C” on the compressor. Check and repair the lead or
connections if there is no continuity.
CAPACITOR CHECK
9. Check or replace start capacitor, disconnect bleed resistor before checking for shorted capacitor.
10. Check or replace run capacitor (if supplied) check or shorted capacitor or either terminal grounded to case.
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SAFETY CONTROLS
FIGURE 11. GEAR MOTOR THERMAL OVERLOAD
Your Icemaker unit has several safety and control devices incorporated into its design.
WARNING: None of the below described devices should ever be ”bypassed” to allow the
unit to function.
The safety and control system shut–off devices are:
1. Low water shut off reed switch located in icemaker float assembly. (Automatic reset type).
2. Gear motor thermal overload, manual reset type (red button on motor). See Figure 11.
3. Compressor thermal overload, automatic reset type.
4. Main service switch located on top of the control box.
5. Hopper shut–off.
6. High pressure cut out (water cooled only).
WARNING: Do not reset gear motor overload if ice is present in the evaporator.
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Page 20
GUIDE TO GOOD ICE
CUSTOMER COMMENTS CHECK ICEMAKER LOCATION
CONDITIONS FIRST
It runs but the ice is too soft.
The icemaker is not producing enought ice.
The ice is too wet.
It makes too much noise.
(with this comment the ice is usually extremely hard and larger thant
normal).
Under compression
Proper air flow for condensing
system
Location too close to high
temp units such as coffee
urns, deepfryers, grills etc.
Supply water conditions.
Water too warm (above 90_F)
Water artificially softened
above 262 PPM sodium
chloride.
Normal water supply too high.
Over Compression
Check to see if nois objection
objections is normal fan and
air flow noise.
Water supply conditions.
CHECK ICEMAKER
Use gages for checking suction
and head pressures. See manual
for correct reading and conditions.
Check water level for proper adjustment and restrictions. See Manual.
Check evaporator assembly for
worn parts, bearings, scored evaporator and, bad expansion valve,
etc.
Obstructions partially blocking ice
exit from top of evaporator.
Check fan and fan shroud.
Check for loose parts and screws
rattling.
Water too cold (below 50_F)
(Possibly running from
Pre-cooler).
Check evaporator assembly for
worn parts, bearings, scored evaporator and auger, bad expansion
valve etc.
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Page 21
TROUBLESHOOTING CHART – ICEMAKER NOT OPERATING
NO POWER
–Check electrical wiring in
control box for loose connections
–Check for failed service switch
or relay
–Check power to machine
Low on
leaks
Too much
refrigerant in
system
Non–condensibles
in system
Evacuate and
recharge system.
Clean condenser
refrigerant
Check for
Condenser
fan not
running
– Check electrical circuit
to fan motor
– Check fan motor
Plugged
liquid line
dryer
Replace
drier.
Evacuate
and
recharge
system
Restricted
liquid line
Check for
kinks or
damage to
liquid line
Condenser
dirty or
restricted
Plugged or
faulty TXV
ICEMAKER RUNS BUT
DOES NOT MAKE ICE
Condenser fan runiing but
compressor not running
–Check line voltage
–Check compressor winding
& components
Evaporator water tube may
have an air bubble.
Clear air bubble from tube
Head
pressure
high
Valve stuck
open
Replace
valve
Icemaker
froze up
Replace
valve
evacuate
and
recharge
system
Check if
auger is
turning
No
LOW WATER SAFTEY
SWITCH OPEN
–Check that wateris turned on
–Check for restriction in water line
–Check incoming water pressure
–Check water saftey switch
High suction pressure (30
lbs. or above)
TXV not
operating
properly
tighten
Bulb
loose
Clean
and
Suction line
uninsulated
(minimum 10 lbs.)
Low suction presure
not
insulated
Bulb
Clean and
insulate
STORAGE CONTAINER
BIN SWITCH OPEN
–Check bin switch
–Check to see if ice
control plate moves
(20 lbs. or below)
TXV bulb lost
charge
Replace valve
evacuate and
recharge
ICEMAKER OPERATING BUT
– Soft ice
– Poor dispensing
freely
– Check bin switch
– Check to see if ice control
plate moves freely
Yes No
Clean all
related drain
lines
IMPORTANT
Icemaker runs when reset
but problem has not been
found.
Continue checking for
overload as follows to guard
against future problems
OVERLOAD GUIDE
ELECTRICAL:
– High or low voltage Weak power lines can cause overloads on icemaker restarts
– High running current. Check motor circuits and start relay – Auger delay failed
ICEMAKER:
– Mechanical parts worn. Scored evaporator or auger. Worn thrust bearing
– Ice maker not turning off. Failed ice level control
– Over compession. Low water inlet temperature. Restriction in water line from reservior
REFRIGERANT:
– Contaminated charge or bad compressor.
– Low charge or gas leak
– Low suction pressure. Improper expansion valve sensing bulb location or insulation
and/or defective expansion valve
Refer to ”Guide
to Good Ice” in
Service manual
Icemaker runs
Short run trips
again in 2 minutes.
Check gearmotor
circuit
GEARMOTOR OVERLOAD
TRIPPED
Check water level control
and evaporator water tube
for lime build up restriction
No Yes
CAUTION
Clear ice from
evaporator and
auger before
resetting
overload
Reset
overload
Resets but
motor does not
run
Check
gearmotor
circuit
CLEAN
See
instructions
Will not
reset
Overload
hot try
again
Will not
reset
replace
overload
Check drive on
gearmotor
Check gears in
gearbox
Check if extruding
head is down in
evaporator tube
630460050SER
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Page 22
IMI CORNELIUS INC.
ONE CORNELIUS PLACE
ANOKA, MN. 55303–6234
TELEPHONE (800) 238–3600
FACSIMILE (612) 422–3232
TECH SVC 1-800-535-4240
WARRANTY
IMI Cornelius Inc. and Remcor Products Company warrants that all equipment and parts are free
from defects in material and workmanship under normal use and service. For a copy of the warranty
applicable to your Cornelius and or Remcor product, in your country, please write, fax or telephone
the IMI Cornelius office nearest you. Please provide the equipment model number, serial number
and the date of purchase.
IMI Cornelius Offices
AUSTRALIA D P. O. 210, D RIVERWOOD, D NSW 2210, AUSTRALIA D (61) 2 533 3122 D FAX (61) 2 534 2166
D AM LANGEN FELDE 32 D A-1222 D VIENNA, AUSTRIA D (43) 1 233 520 D FAX (43) 1-2335-2930
AUSTRIA
D BOSKAPELLEI 122 D B-2930 BRAASCHAAT, BELGIUM D (32) 3 664 0552 D FAX (32) 3 665 2307
BELGIUM
BRAZIL
D RUA ITAOCARA 97 D TOMAS COELHO D RIO DE JANEIRO, BRAZIL D (55) 21 591 7150 D FAX (55) 21 593 1829
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ENGLAND
D 71 ROUTE DE ST. DENIS D F-95170 DEUIL LA BARRE D PARI S, FRANCE D (33) 1 34 28 6200 D FAX (33) 1 34 28 6201
FRANCE
GERMANY
GREECE
HONG
ITALY
NEW
SINGAPORE
SPAIN
USA
D CARL LEVERKUS STRASSE 15 D D-4018 LANGENFELD, GERMANY D (49) 2173 7930 D FAX (49) 2173 77 438
D 488 MESSOGION AVENUE D AGIA PA RA SKE VI D 153 42 D ATHENS, GREECE D (30) 1 600 1073 D FAX (30) 1 601 2491
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ZEALAND D 20 LANSFORD CRES. D P. O. BOX 19-044 AVONDALE D AUCKLAND 7, NEW ZEALAND D (64) 9 8200 357 D FAX (64) 9 8200 361
D 16 TUAS STREET D SINGAPORE 2263 D (65) 862 5542 D FAX (65) 862 5604
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D ONE CORNELIUS PLACE D ANOKA, MINNESOTA D (612) 421-6120 D FA X (612) 422-3255
19
630460050SER
Page 23
IMI CORNELIUS INC.
Corporate Headquarters:
630460050SER
Anoka, Minnesota 55303-6234
One Cornelius Place
Telephone (800) 238-3600
Facsimile (800) 535-4231
20
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