ICE MAKER - WM600 AND CM600 Service Manual Release Date: March 11, 2004 Publication Number: 630460082SER Revision Date: March 18, 2014 Revision: C Visit the Cornelius web site at www.cornelius.com for all your Literature needs.
The products, technical information, and instructions contained in this manual are subject to change without notice. These instructions are not intended to cover all details or variations of the equipment, nor to provide for every possible contingency in the installation, operation or maintenance of this equipment. This manual assumes that the person(s) working on the equipment have been trained and are skilled in working with electrical, plumbing, pneumatic, and mechanical equipment.
TABLE OF CONTENTS Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Read and Follow ALL Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Safety Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Recognition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condenser Modulating Valve Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Gear Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Troubleshooting Gear Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Maker Service Manual SAFETY INSTRUCTIONS READ AND FOLLOW ALL SAFETY INSTRUCTIONS Safety Overview • Read and follow ALL SAFETY INSTRUCTIONS in this manual and any warning/caution labels on the unit (decals, labels or laminated cards). • Read and understand ALL applicable OSHA (Occupational Safety and Health Administration) safety regulations before operating this unit. Recognition Recognize Safety Alerts ! This is the safety alert symbol.
Ice Maker Service Manual SAFETY PRECAUTIONS This unit has been specifically designed to provide protection against personal injury. To ensure continued protection observe the following: ! WARNING: Disconnect power to the unit before servicing following all lock out/tag out procedures established by the user. Verify all of the power is off to the unit before any work is performed. Failure to disconnect the power could result in serious injury, death or equipment damage.
Ice Maker Service Manual GENERAL INFORMATION SPECIFICATIONS Model WM (Wall Model) 600 and CM (Counter Model) 600 Compressor 3/4 H.P. (R404 Refrigerant) Voltage 115 VAC, 60 Hz, Single Phase Current Draw 16 Amps Circuit Breaker or Fuse Size 20 Amp Maximum Time Delay DESCRIPTION Models WM600 and CM600 Ice Makers are self-contained wall mount and counter style Units which automatically make hard compressed-style ice and store it in a sealed hopper for sanitary dispensing.
Ice Maker Service Manual 3. Apply a continuous bead of NSF listed silastic sealant (Dow 732 or equal) approximately 1/4–inch inside of the Unit outline dimensions. Then, position the Unit on the counter within the outline dimensions. All excess sealant must be wiped away immediately. IMPORTANT: The WM600 with a full ice storage hopper weighs 450 pounds. Make sure that the mounting surface is adequately reinforced to support this weight.
Ice Maker Service Manual INITIAL START UP, CHECKS AND ADJUSTMENT INSTRUCTIONS NOTE: Do not start the Unit before completing the previous Installation steps. Turn on the water supply and main power switch (located on top of the electrical box). NOTE: If the Unit will not start, be sure the water reservoir is full. The low water safety control must be properly adjusted to start and shut down the Unit. If the water level drops below the bottom of the reservoir, the Unit must shut down.
Ice Maker Service Manual GUIDE TO SERVICE IMPORTANT: Preventive maintenance can increase the trouble-free life of your Ice Maker. Failure to perform preventive maintenance could void your equipment warranty. ICE MAKER CLEANING AND SANITIZING PROCEDURES IMPORTANT: Do not use any of the ice made during cleaning operations. Clean and sanitize ice storage area when cleaning Ice Maker. ! WARNING: Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user.
Ice Maker Service Manual Semi-Annually Semi-annually, in addition to all previously established service procedures, perform the following: 1. Check for water leaks; tube connections, water fittings, and the lower icemaker water seal. 2. Check the drain tubes for clogs and ”aged” tubes. Replace if tubes are stained or brittle. Figure 2. Auger Assembly 3. Check for signs of condensation. Clean where necessary and replace insulation properly. 4. Check safety circuits for proper operation. 5.
Ice Maker Service Manual WATER LEVEL CONTROL WATER LEVEL CONTROL OPERATION When water is introduced through the inlet fitting, the float rises (see Figure 1). The float pushes against a lever that in turn, forces the poppet assembly against the inlet fitting valve seat that seals the water off. 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 Unit.
Ice Maker Service Manual TO REPLACE WATER LEVEL SAFETY SWITCH ! WARNING: Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user. Verify all power is off to the unit before performing any work. Failure to comply could result in serious injury, death or damage to the equipment. 1. Shut off main power switch or unplug the Ice Maker from electrical outlet. 2. Unplug Molex connector connecting switch to the electrical box. 3.
Ice Maker Service Manual REFRIGERATION SYSTEMS REFRIGERATION SYSTEM ADJUSTMENTS A complete understanding of the Ice Maker and the 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.
Ice Maker Service Manual TEMPERATURE / PRESSURE CHART* ± 10 lb Discharge Pressure Air Tempeature(°F) REFRIGERANT TYPE R404A Water Temperature(°F) 40 65 90 50 174 177 180 60 202 205 208 70 230 233 236 80 265 269 272 90 300 304 307 100 328 334 340 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
Ice Maker Service Manual CONDENSER MODULATING VALVE REMOVAL ! WARNING: Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user. Verify all power is off to the unit before performing any work. Failure to comply could result in serious injury, death or damage to the equipment. 1. Shut off water supply to condenser, then reclaim refrigerant from system. 2. Remove inlet water line from Condenser modulating Valve.
Ice Maker Service Manual 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 voltage supply. 3. Problems in the gear motor electrical circuit. See Figure 4.
Ice Maker Service Manual 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 Figure 5 and Figure 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 5) 1.
Ice Maker Service Manual AUGER & EXTRUDING HEAD REMOVAL Figure 8. 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 8. TO REPLACE BEARINGS ! WARNING: Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user.
Ice Maker Service Manual 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 TEMPERATURE/PRESSURE CHART. ELECTRICAL CHECKOUT Figure 9. Electrical Box ! WARNING: Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user.
Ice Maker Service Manual SAFETY CONTROLS Figure 10. 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 10. 3.
Ice Maker Service Manual GUIDE TO GOOD ICE CUSTOMER COMMENTS It runs but the ice is too soft. The icemaker is not producing enough ice. The ice is too wet. CHECK ICEMAKER LOCATION CONDITIONS FIRST 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.
Figure 11. Troubleshooting Chart Ice Maker Service Manual Publication Number: 630460082SER - 19 - © 2004-2014, Cornelius Inc.
Figure 12. Wiring Diagram Ice Maker Service Manual © 2004-2014, Cornelius Inc.
Ice Maker Service Manual Figure 13. Mounting Template Publication Number: 630460082SER - 21 - © 2004-2014, Cornelius Inc.
Ice Maker Service Manual © 2004-2014, Cornelius Inc.
Cornelius Inc. www.cornelius.
