Cornelius Ice Maker WCC1401 A User Manual

®
CONTINUOUS FLOW ICEMAKER  
WCC1401-A/WCF1411-A Series  
Service Manual  
Release Date: October 26, 2006  
Publication Number: 630460324SER  
Revision Date: September 24, 2008  
Revision: C  
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TABLE OF CONTENTS  
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Read and Follow all Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Recognize Safety Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Different Types of Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Qualified Service Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Shipping And Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Specification Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Refrigeration Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Cleaning and Sanitizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Icemaker Cleaning and Sanitizing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Monthly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Quarterly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Semi-Annually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Refrigeration System Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Pumpdown Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Expansion Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Water Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
How Water Level Control Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Purpose of Water Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
To Replace Water Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
To Replace Water Level Safety Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Bin Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Motor Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Start Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
To Replace Gearmotor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Auger and Extruding Head Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Installation and Shaft Seal Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Upper Nut and Bearing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
To Replace Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Electrical Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Overload Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Compressor Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Capacitor Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Safety Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
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SAFETY  
SAFETY INSTRUCTIONS  
Read and Follow all Safety Instructions  
Read and follow all safety instructions in this manual and on the machine (decals, labels, and laminated  
cards).  
Read and understand all applicable OSHA (Occupation Safety and Health Administration) safety regula-  
tions before operating the machine.  
Recognize Safety Alerts  
This is the safety alert symbol. When you see it in this manual or on the machine be  
alert to the potential of personal injury or damage to the machine.  
Different Types of Alerts  
There are 3 types of safety alerts:  
DANGER — Indicates an immediate hazardous situation which if not avoided WILL result in seri-  
ous injury, death, or equipment damage.  
WARNING — Indicates a potentially hazardous situation which, if not avoided, COULD result in  
serious injury, death, or equipment damage.  
CAUTION — Indicates a potentially hazardous situation which, if not avoided, MAY result in  
minor or moderate injury or equipment damage.  
SAFETY TIPS  
• Carefully read all safety messages in this manual and safety signs on the machine.  
• Keep safety signs in good condition and 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 proper training. This appliance is not intended for use  
by very young children or infirm persons without supervision. Young children should be supervised to  
ensure that they do not play with the appliance.  
• Keep your machine in proper working condition and do not allow unauthorized modifications to the  
machine.  
QUALIFIED SERVICE PERSONNEL  
CAUTION — Only trained and certified electrical, plumbing and refrigeration technicians should  
service this unit. ALL WIRING AND PLUMBING MUST CONFORM TO NATIONAL AND LOCAL  
CODES.  
SHIPPING AND STORAGE  
CAUTION — Before shipping, storing, or relocating the Unit, syrup systems must be sanitized  
and all sanitizing solution must be purged from the syrup systems. All liquids, after sanitizing, must  
be purged from the unit. A freezing ambient environment will cause residual sanitizing solution or  
water remaining inside the Unit to freeze resulting in damage to the internal components.  
© 2006-2008, IMI Cornelius Inc.  
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Publication Number: 630460324SER  
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GENERAL DESCRIPTION  
This section gives the Unit description, theory of operation, and design data for continuous flow icemaker  
series WCC1401-A.  
SPECIFICATION CHART  
Refrigerant  
Comp.  
RLA  
Fan  
Amps  
GRMTR  
Amps  
Circuit  
Fuse  
Models  
Description  
VAC  
HZ PH Wire  
60  
Oz.  
Type  
WCC1401-A  
Ice Maker  
208/230  
1
2
12.2  
1.2 (2) 2.0 (2)  
35  
404A  
20  
FIGURE 1  
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FIGURE 2. Series WCC1401-A/WCF1411-A Dimension Drawing  
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ELECTRICAL  
FIGURE 3. Schematic WCC1401-A/WCF1411-A  
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REFRIGERATION SCHEMATIC  
Condenser  
Evaporator  
TXV  
Dryer  
Compressor  
FIGURE 4. WCC1401-A  
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FIGURE 5. WCC2001QTR REFRIGERATION DIAGRAM  
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CLEANING AND SANITIZING  
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.  
2.  
3.  
4.  
Turn off machine.  
Shut off water supply  
Remove ice from storage bin.  
Mix approved cleaner (2 gallons as directed). Recommended cleaner: No-Calgon liquid ice  
machine cleaner. Mixture: 3-1/3 ounces per gallon of water.  
WARNING: Cleaner must be safe for stainless steel. NO EXCEPTIONS!  
5.  
Clean auger/diverter assembly and ice transition/drop tube in a sink using cleaner mixture and  
reinstall in icemaker. Using cleaner, wipe down dispense tray.  
6.  
7.  
8.  
9.  
Turn machine on and add cleaner solution to water level control until 2 gallons have been used.  
Turn on water supply and run machine for 15 minutes.  
Turn off machine and remove all ice.  
Sanitize using household liquid bleach (50 ppm chlorine). Mixture: 1 fluid ounce per gallon room  
temperature water. 2 minute exposure time.  
10. Sanitize auger/diverter assembly and ice transition/drop tube in a sink using sanitizing solution and  
reinstall in icemaker. Using sanitizer, wipe down the dispense tray.  
11. Fill icemaker with sanitizer by slowly pouring solution into water feed reservoir until full. Solution  
drains through overflow tube. Do not run machine. Allow to air dry.  
12. If icemaker is used in conjunction with ice dispenser or storage bin, follow manufacturer's  
recommended cleaning instructions at this time.  
MAINTENANCE  
Preventive maintenance can increase the trouble free life of your icemaker. Many authorized service  
agencies offer service contracts for your icemaker. Contact your local distributor for further information.  
Monthly  
1.  
Clean the condenser. Use a brush, vacuum cleaner or blower from inside with air or CO2 gas.  
2.  
Inspect water feed reservoir at least once a month until a definite pattern for cleaning and sanitizing  
has bee established.  
Quarterly  
This is the maximum period of time between cleaning and sanitizing the icemaker. In addition to rec-  
ommended monthly procedure, and if a more frequent cleaning and sanitizing pattern has not been  
established, unit must be cleaned and sanitized.  
© 2006-2008, IMI Cornelius Inc.  
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Publication Number: 630460324SER  
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Semi-Annually  
Semi-Annually in addition to all previously established service procedures perform the following:  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
Check for water leaks in tube connections, water fittings and lower icemaker water seal.  
Check drain tubes for clogs and aged tubes. Replace if tubes are stained or brittle.  
Check for signs of condensation. Clean where necessary and replace insulation properly.  
Check safety circuits for proper operation.  
Check refrigeration system.  
Check unit for abnormal noise. Tighten machine and cabinet screws if necessary.  
Check white upper bearing on auger assembly. If bearings are less than 1/16” thick, replace.  
REPLACE  
OK  
1/16  
1/16  
OK  
REPLACE  
FIGURE 6. UPPER NUT AND BEARING ASSEMBLY  
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REFRIGERATION SYSTEM  
Suction Pressure +- 2 lb.  
Water Temperature  
Discharge Pressure +- 10 lbs.  
Water Temperature  
50°  
18  
20  
20  
21  
23  
27  
70°  
18  
20  
20  
21  
23  
27  
90°  
18  
20  
20  
21  
23  
27  
50°  
213  
220  
225  
230  
251  
302  
70°  
213  
220  
225  
230  
251  
302  
90°  
213  
220  
226  
231  
252  
303  
50°  
60°  
70°  
80°  
90°  
105°  
50°  
60°  
70°  
80°  
90°  
105°  
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 650F to 900F, 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.  
PUMPDOWN CYCLE  
The Series1400 unit is a split system. The icemaker consists of two gearmotor/evaporator assemblies  
and a liquid line solenoid. The condensing unit consists of a compressor, condenser, fan motor and  
receiver. The icemaker is designed for indoor use only. The condensing unit is designed for outdoor use.  
The two units are connected with a precharged line kit.  
The system operates on a pump down cycle. When the bin thermostat senses ice it opens the circuit to  
the liquid line solenoid. The liquid line solenoid closes and stops the flow of refrigerant to the  
evaporators. This causes the suction pressure to drop. The condensing unit is shut off when the suction  
pressure drops below 5 psig. The low-pressure control should be adjusted to open between 0-5 psig and  
close between 15-20 psig. Note: there is no electrical connection between the two units.  
EXPANSION VALVE  
You will find a thermal expansion valve on icemakers, 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.  
NOTE: Units with thermostatic expansion valve, the valve is located on bottom refrigerant line.  
Sensing bulb is located on top refrigerant line.  
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.  
© 2006-2008, IMI Cornelius Inc.  
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Publication Number: 630460324SER  
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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  
(page 7). 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 in the installation manual.  
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.  
4.  
5.  
Remove flexible tubing at bottom of water level bowl connected to the overflow.  
Hold water inlet fitting with proper tool to prevent it from rotating when disconnecting the water inlet.  
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.  
2.  
3.  
Shut off main power switch or unplug the ice dispenser from electrical outlet.  
Unplug Molex connector connecting switch to electrical box.  
Remove the 2 screws anchoring the water level safety switch to the bottom of the water level  
control mounting bracket.  
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BIN CONTROL  
The type of bin control used on all WCC and WCF Models is an electronic control. The control is supplied  
with power to terminals X1 and X2. Terminals X3 and X4 are a normally closed switch which open when  
the thermostat sensor bulb senses ice. The WCC1401-A/WCF1401-A uses 2 controls, terminals X1 and  
X2 are connected in parallel and terminals X3 and X4 are connected in series.  
The sensing bulbs are located in a 5/16” stainless steel tube which hangs from the dispense tray covers  
down through the center of the drop tube.  
To test the switch, start the icemaker and block the outlet tube, about ½ full the icemaker should shut off.  
When the tube is cleared the icemaker should restart within 5 min.  
The Bin controls are in electrical series with the coil on the antifreeze relay along with the low water  
safety.  
The controls are held in place inside the electrical box by 4 screws. The control bulbs are in the drop  
tubes. They can be removed by pulling the cable located on the top of the dispense tray cover. When  
replacing the sensor make sure the bulb is inserted to the bottom of the thermostat well.  
GEARMOTOR  
The gearmotors are 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 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 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 overloads to each motor are connected in series; if either overload trips both gearmotors and the  
liquid line solenoid are shut off.  
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GEARMOTOR  
OVERLOAD TRIPPED  
Check water level control  
and evaporator water tube  
for line build-up restrictions.  
NO  
YES  
CAUTION  
Clear ice from  
evaporator and  
auger before  
CLEAN  
See Instructions.  
resetting overload.  
Reset overload.  
IMPORTANT  
Icemaker  
runs.  
Will not  
Reset.  
Resets but  
motor does  
not run.  
Icemaker runs when  
reset but problem has  
not been found.  
Continue checking for  
overload as follows to  
guard against future  
problems.  
Short run. Trips  
again in 2  
minutes. Check  
gearmotor circuits.  
Overload  
hot try  
again.  
Resets but  
motor does  
not run.  
Will not  
reset.  
Replace  
overload.  
Check  
gearmotor  
circuits.  
OVERLOAD GUIDE  
ELECTRICAL:  
High or low voltage. Weak power lines can cause overloads on icemakers restarts.  
High running current (2.4amps or above). Check motor circuits and start relay.  
Auger delay failed.  
ICEMAKER  
Mechanical parts worn. Scored evaporator or auger. Worn thrust bearing.  
Icemaker not turning off. Failed ice level control.  
Over compression. Low water inlet temperature. Restrictions in water line from reservoir.  
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.  
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MOTOR CHECK  
The resistance readings on the winding will be between 5 to 25 ohms. A meter capable of these low  
readings must be used. The start relay cover must be removed.  
If no continuity on start or run winding test, replace gearmotor. If continuity on grounded motor test,  
replace gearmotor.  
START RELAY  
1.  
Check between “2” and “4” on relay (with relay unplugged). If there is continuity replace the relay,  
as the relay contacts should be open.  
2.  
Check between “3” and “4” on relay, if no continuity replace the relay.  
FIGURE 7. GEARMOTOR ASSEMBLY  
TO REPLACE GEARMOTOR ASSEMBLY  
1.  
2.  
3.  
4.  
Disconnect the icemaker from the electrical power source.  
Disconnect the transmission cable from the electrical box.  
Remove the 4 hex head bolts securing the evaporator to the top of the transmission.  
Remove the 4 bolt’s holding the transmission and bracket to frame base, while supporting the  
weight of the evaporator. Remove the transmission from the unit.  
5.  
When replacing the transmission, it may be necessary to rotate the auger back and forth to align  
the motor shaft and auger.  
AUGER NUT  
AUGER  
BEARING NYLON  
BEARING DELRIN  
“D” DRIVE  
GROOVE  
EXTRUDING  
HEAD  
ANTI–ROTATION  
RIB – 3 PLACES  
FIGURE 8. AUGER AND EXTRUDING HEAD REMOVAL  
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AUGER AND EXTRUDING HEAD REMOVAL  
1.  
2.  
3.  
4.  
Disconnect unit from power supply.  
Remove storage container cover and put aside.  
Turn off water supply to icemaker.  
After ice has melted from head take hold of the auger nut and lift straight up to disengage from  
icemaker.  
5.  
When replacing the auger assembly, make certain that both the auger engages the output shaft  
drive and the extruding head ribs engage the evaporator tube.  
INSTALLATION AND SHAFT SEAL REPLACEMENT  
1.  
Place shaft seal locator seat and shaft  
seal mount over gearmotor output shaft  
and push down until shaft seal seat and  
shaft seal mount rest flush on top of  
gearmotor.  
2.  
Place rubber coated ceramic seal  
(important: ceramic face up) over output  
shaft and push down until seal nest in  
recess of shaft seal mount. (lubricate  
rubber on ceramic seal with rubber  
lubricant).  
E–RING  
WASHER, PLAIN FLAT  
SHAFT SEAL  
MOUNT, SHAFT  
SEAL  
3.  
4.  
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.  
SEAT, SHAFT SEAL  
Place flat washer over output shaft and let  
rest on the output shaft seal. 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  
GEARMOTOR  
FIGURE 9. SHAFT SEAL 700 AND 1000  
UPPER NUT AND BEARING ASSEMBLY  
The upper white bearing located on top of the auger is used to absorb the force between the auger and  
extruding head.  
NOTE: 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.  
To Replace Bearing  
1.  
Disconnect unit from electric power.  
2.  
3.  
4.  
Remove top panels.  
Remove Dispense Tray Cover.  
Use an open end wrench on auger nut connected to bearing and turn counterclockwise to remove  
assembly.  
5.  
Remove worn bearings. Replace with new bearings and then reinstall assembly.  
NOTE: If auger turns with nut, remove cover on top of gearmotor stator and hold motor while  
loosening nut.  
Publication Number: 630460324SER  
- 14 -  
© 2006-2008, IMI Cornelius Inc.  
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Continuous Flow Icemaker Service Manual  
ELECTRICAL CHECKOUT  
1.  
2.  
3.  
Be sure the unit is disconnected from the power source. Remove the compressor electrical box  
cover. Check for obvious damage and loose wires.  
Disconnect the fan motor leads. Since capacitors store energy, short the capacitor with a  
screwdriver. This will prevent shocks.  
Disconnect the compressor terminal wires.  
OVERLOAD CHECK  
Using a volt–ohmmeter check the continuity  
across the overload, contact #1 and #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.  
FIGURE 10. OVERLOAD CHECK  
COMPRESSOR CHECK  
The resistance readings on the windings will be  
between 0.25 to 10.00 ohms, a meter capable of  
these low readings must be used.  
1.  
Check between “C” and “R.” Replace the  
compressor if there is no continuity as the  
run windings are open.  
2.  
Check between “C” and “S.” Replace the  
compressor if there is no continuity as the  
start windings are open.  
FIGURE 11. COMPRESSOR CHECK  
3.  
4.  
Check between “C” and “R” or “S” and the shell of the compressor. If there is continuity, replace the  
compressor as the motor is grounded.  
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  
1.  
2.  
Check or replace start capacitor, disconnect bleed resistor before checking for shorted capacitor.  
Check or replace run capacitor (if supplied) check for shorted capacitor or either terminal grounded  
to case.  
SAFETY CONTROLS  
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.  
2.  
3.  
4.  
5.  
6.  
7.  
Low water shut off reed switch located in icemaker float assembly. (Automatic reset type.)  
Gearmotor thermal overload, manual reset type (red button on motor).  
Compressor thermal overload, automatic reset type.  
Anti–freeze relay and associated circuit. See wiring diagrams.  
Main service switch located on top of the control box.  
Bin Control.  
High pressure cut out (water cooled only).  
© 2006-2008, IMI Cornelius Inc.  
- 15 -  
Publication Number: 630460324SER  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Continuous Flow Icemaker Service Manual  
GUIDE TO GOOD ICE  
CUSTOMER  
COMMENTS  
CHECK ICEMAKER  
LOCATION CONDITIONS  
FIRST  
CHECK ICE MAKER  
“It runs but the ice is  
too soft.”  
Proper air flow for condens-  
ing system.  
Use gauges for checking  
suction and head  
pressures. See manual  
for correct reading and  
conditions. Check frost  
line and sight glass.  
“The icemaker is not  
Location too close to high  
units such as coffee urns,  
deep fryers, grills, etc.  
producing enough ice.”  
“The ice is too wet.”  
Supply water conditions  
Check water level for  
proper adjustment and  
restrictions. See  
Manual.  
Water too warm  
(above 90oF).  
Water artificially softened  
above 262 ppm sodium chlo-  
ride.  
Check evaporator  
assembly for worn  
parts, bearings, scored  
evaporator and auger,  
bad expansion valve.  
etc.  
Normal water supply too high  
in total dissolved solids  
(above 500 PPM).  
“It makes too much  
noise.”  
(With this comment  
the ice is usually  
extremely hard and  
larger than normal.)  
Check to see if noise  
objection is normal fan and  
air flow noise.  
Check for loose parts  
and screws rattling.  
Check evaporator  
assembly for worn  
parts, bearings, scored  
evaporator and auger,  
bad expansion valve,  
etc.  
Over  
Compression  
Supply water conditions.  
Water too cold (below  
50oF). (Possibly running  
from pre-cooler.)  
Obstructions partially  
blocking ice exit from top of  
evaporator.  
Check fan and fan shroud.  
Publication Number: 630460324SER  
- 16 -  
© 2006-2008, IMI Cornelius Inc.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Continuous Flow Icemaker Service Manual  
TROUBLESHOOTING  
© 2006-2008, IMI Cornelius Inc.  
- 17 -  
Publication Number: 630460324SER  
Download from Www.Somanuals.com. All Manuals Search And Download.  
IMI Cornelius Inc.  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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