Service manual

ManualsBrandsManitowoc ManualsIce MakerCVD1375

Thank you for selecting a Manitowoc Ice Machine, the dependability leader in ice making equipment and related products.

With proper installation, care and maintenance, your new Manitowoc Ice Machine will provide you with many years of

reliable and economical performance.

Q Model

QuietQube

® Ice Machines

with CVD® Technology

Models Q0600C/Q0800C/Q1000C

Q1400C/QDUALC

IB0600C/IB0800C/IB1000C

Service

Manual

Part Number 80-1206-3

5/2005

This manual is updated as new information and models

are released. Visit our website for the latest manual.

www.manitowocice.com

Summary of content (140 pages)

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Q Model QuietQube® Ice Machines with CVD® Technology Models Q0600C/Q0800C/Q1000C Q1400C/QDUALC IB0600C/IB0800C/IB1000C Service Manual Thank you for selecting a Manitowoc Ice Machine, the dependability leader in ice making equipment and related products. With proper installation, care and maintenance, your new Manitowoc Ice Machine will provide you with many years of reliable and economical performance. This manual is updated as new information and models are released.
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Safety Notices Procedural Notices As you work on a QuietQube®-Series Ice Machine, be sure to pay close attention to the safety notices in this manual. Disregarding the notices may lead to serious injury and/or damage to the ice machine. As you work on a QuietQube®-Series Ice Machine, be sure to read the procedural notices in this manual. These notices supply helpful information which may assist you as you work.
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Table of Contents Section 1 General Information Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How to Read a Model Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remote Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ice Cube Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents (continued) Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . QuietQube® Ice Machine Head Section Electrical Wiring Connections . . . . . QuietQube® Ice Machine Head Section 115/1/60 or 208-230/1/60 . . . . . . . QuietQube® Ice Machine Head Section 230/1/50 . . . . . . . . . . . . . . . . . . . . . For United Kingdom Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents (continued) Section 4 Ice Machine Sequence of Operation Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/SU1000C . . . . . . . . . . . Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . . . . Freeze Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Harvest Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic Shut-Off . . . . . . . . . . . . . . . . . . . . .
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Table of Contents (continued) Component Specifications and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic Bin Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main Fuse . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents (continued) Cycle Time/24 Hour Ice Production/Refrigerant Pressure Charts . . . . . . . . . Q0600C/CVD0675 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . . IB0600C/CVD0675 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . . Q0800C/CVD0875 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . . IB0800C/CVD0875 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . . Q1000C/CVD1075/CVD1285 Series Remote Air Cooled . . . .
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Table of Contents (continued) 6 Part No.
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Section 1 General Information Model Numbers How to Read a Model Number This manual covers the following models: Ice Machine Head Section QR0670C QD0672C QY0674C IB0624YC IB0622DC QR0870C QD0872C QY0874C IB0824YC IB0822DC QR1070C QD1072C QY1074C IB1024YC IB1022DC SU1024YC/SerVend UC300 Dispenser QR1470C QD1472C QY1474C QRDUALC QDDUALC QYDUALC CVD® Condensing Unit* 9 REMOTE AIR-COOLED CVD675 CVD675 CVD875 CVD875 CVD1075 CVD1285 # CUBE SIZE CONDENSER TYPE 0 1 2 3 4 5 AIR-COOLED WATER-COOLED AIR-COOLED
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General Information Section 1 Model/Serial Number Location These numbers are required when requesting information from your local Manitowoc distributor, service representative, or Manitowoc Ice, Inc. The model and serial number are listed on the OWNER WARRANTY REGISTRATION CARD. They are also listed on the MODEL/SERIAL NUMBER DECAL affixed to the ice machine head section and condensing unit. Both model/serial numbers must be referenced to obtain warranty or service information.
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Section 1 General Information Owner Warranty Registration Card EXCLUSIONS GENERAL The following items are not included in the ice machine’s warranty coverage: Warranty coverage begins the day the ice machine is installed. Important Complete and mail the OWNER WARRANTY REGISTRATION CARD as soon as possible to validate the installation date.
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General Information Section 1 THIS PAGE INTENTIONALLY LEFT BLANK 1-4 Part No.
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Section 2 Installation Instructions Ice Machine Dimensions Q0600C/Q0800C/Q1000C ICE MACHINES Ice Machine Q0600C Q0800C Q1000C Important Dimension H 21.5 in (54.6 cm) 26.5 in (67.3 cm) 29.5 in (74.9 cm) Failure to follow these installation guidelines may affect warranty coverage. IB0600C ICE MACHINE 22” (55.8 CM) 24.5” (62.23 CM) 30” (76.2 CM) 13” (33 CM) 3” (7.62 CM) H 8” (20.3 CM) 21” (54.6 CM) 22” (56 CM) 19.5” (48.9 CM) 5.5” (14 CM) 3” (7.62 CM) 10” (25.4 CM) 4.5” (11.4 CM) SV1752 5.
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Installation Instructions Section 2 SU1000C ICE MACHINES The SU1024YC is designed for installation on a SerVend UC-300 dispenser only. Refer to the Servend UC-300 Installation Use and Care Manual for exterior dimensions. Q1400C ICE MACHINES 12” (30.48 cm) 24.5” (62.23 cm) 30” (76.2 cm) 42” (106.68 cm) 6.87” (17.45 cm) 5.37” (13.64 cm) 3.24” (8.23 cm) 19” (48.26 cm) 24” (60.96 cm) 14.77” (37.52 cm) 20.96” (53.24 cm) SV3003 21.21” (53.87 cm) 2.02” (5.13 cm) SV1766 QDUALC ICE MACHINE 30” (76.
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Section 2 Installation Instructions Condensing Unit Dimensions CVD1476 CVD0675/CVD0875/CVD1075/CVD1285/CVD1375/CVD1475 Water-Cooled Air-Cooled 24.13” (53.7 CM) 34” (86.4 CM) 21.87” (55.5 CM) 24.53” (62.3 CM) 25.75” (65.4 CM) 20.64” (52.4 CM) 14.5” (36.8 CM) FRONT VIEW 14.5” (36.8 CM) 4.26” (10.8 CM) 9.5” (24.1 CM) 12.6” (32 CM) 10.75” (27.3 CM) 8.54” (21.6 CM) 8.70” (22.1 CM) SV1758 SV3076 CVD1875/CVD2075 Air-Cooled 26” (66.04 CM) 52.5” (133.35 CM) 11.5” (28.58 CM) 6.5” (16.5 CM) 26” (66.
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Installation Instructions Location of Ice Machine The location selected for the ice machine must meet the following criteria. If any of these criteria are not met, select another location. • The location must be free of airborne and other contaminants. • The air temperature must be at least 35°F (1.6°C), but must not exceed 110°F (43.4°C). • The location must not be near heat-generating equipment or in direct sunlight.
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Section 2 Installation Instructions TYPICAL ICE BEVERAGE ON A DISPENSER Important DO NOT REMOVE the label on bin adapters. The retainer clips and brackets must be used. 1. Install bin level thermostat bracket. 2. Set adapter on dispenser. Position the adapter so that the front flange of the adapter will be up against the front lip of the dispenser. Adapter may have to be moved towards the back of the dispenser. 3.
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Installation Instructions Location of CVD Condensing Unit The location selected for the CVD Condensing Unit must meet the following criteria. If any of these criteria are not met, select another location. • The air temperature must be at least -20°F (-28.9°C) but must not exceed 130°F (54.4°C). • CVD1476 Only - The air temperature must be at least 50°F (10°C) but must not exceed 110°F (43°C). • CVD1875/CVD2075 Only - The air temperature must be at least -20°F (-28.9°C) but must not exceed 120°F (48.
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Section 2 Installation Instructions Leveling the Ice Storage Bin Air-Cooled Baffle 1. Screw the leveling legs onto the bottom of the bin. 2. Screw the foot of each leg in as far as possible. The air-cooled baffle prevents condenser air from recirculating. To install: 1. Remove the back panel screws next to the condenser. ! Caution The legs must be screwed in tightly to prevent them from bending. 2. Align the mounting holes in the air baffle with the screw holes and reinstall the screws. 3.
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Installation Instructions Section 2 Electrical Service FUSE/CIRCUIT BREAKER GENERAL A separate fuse/circuit breaker must be provided for each ice machine. Circuit breakers must be H.A.C.R. rated (does not apply in Canada). ! Warning All wiring must conform to local, state and national codes. VOLTAGE The maximum allowable voltage variation is ±10% of the rated voltage at ice machine start-up (when the electrical load is highest).
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Section 2 Installation Instructions Electrical Requirements QuietQube® Ice Machine Head Section Ice Machine Q0600C IB0600C Q0800C IB0800C Q1000C IB1000C SU1000C (UC-300 Dispenser) Q1400C QDUALC Voltage Phase Cycle Maximum Fuse/ Circuit Breaker Total Amps 115/1/60 208-230/1/60 230/1/50 15 amp 15 amp 15 amp 1.1 0.6 0.6 Important The QuietQube® Ice Machine Head Section and CVD Condensing Unit are wired independently from each other.
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Installation Instructions Section 2 QuietQube® Ice Machine Head Section Electrical Wiring Connections ! Warning These diagrams are not intended to show proper wire routing, wire sizing, disconnects, etc., only the correct wire connections. All electrical work, including wire routing and grounding, must conform to local, state and national electrical codes. Though wire nuts are shown in the drawings, the ice machine field wiring connections may use either wire nuts or screw terminals.
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Section 2 Installation Instructions Remote Electrical Wiring Connections CVD CONDENSING UNIT 208-230/3/60 ! Warning These diagrams are not intended to show proper wire routing, wire sizing, disconnects, etc., only the correct wire connections. All electrical work, including wire routing and grounding, must conform to local, state and national electrical codes. Though wire nuts are shown in the drawings, the ice machine field wiring connections may use either wire nuts or screw terminals.
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Installation Instructions Ice Machine Head Section Water Supply and Drains POTABLE WATER SUPPLY Local water conditions may require treatment of the water to inhibit scale formation, filter sediment, and remove chlorine odor and taste. Important If you are installing a Manitowoc water filter system, refer to the Installation Instructions supplied with the filter system for ice making water inlet connections.
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Section 2 Installation Instructions Water Cooled Condenser Water Supply and Drains CONDENSER WATER SUPPLY Local water conditions may require treatment of the water to inhibit scale formation, filter sediment, and remove chlorine odor and taste. WATER COOLED CONDENSER LINES Follow these guidelines to install water lines: • Contact your distributor if your water pressure is greater than 150 psig (1034 kPA). A special order condensing unit is available that allows water pressure up to 350 psig (2413 kPA).
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Installation Instructions Section 2 Refrigeration System Installation QuietQube® Ice Machine Q1000C IB1000C SU1000C/UC300 Q1400C Q0600C IB0600C Q0800C IB0800C QDUALC Remote Single Circuit Condenser CVD1075 CVD1285 CVD1475 CVD1476 Factory Equipment Refrigeration Amounts ICE MACHINE HEAD SECTION Line Set* RC-20 RC-30 RC-50 CVD675 CVD875 CVD875 RC-21 RC-31 RC-51 CVD1875 CVD2075 RC-22 RC-32 RC-52 Line Set Suction Line Liquid Line Insulation Thickness RC 20/30/50 3/4 inch (19.1 mm) 5/8 inch (15.
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Section 2 Installation Instructions Refrigeration Line Set Installation B. LINE SET RISE OR DROP GENERAL Refrigeration line set installations consist of vertical and horizontal line set distances between the ice machine and the condensing unit. The following guidelines, drawings and calculation methods must be followed to assure proper oil return and CVD condensing unit/ice machine operation 35’ (10.7 M) MAX.
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Installation Instructions Section 2 C. SUCTION LINE OIL TRAPS ! Caution Do not form unwanted traps in refrigeration lines. Never coil excess refrigeration tubing. Service Loop A service loop in the line set permits easy access to the ice machine for cleaning and service. A service loop is an installation requirement on Ice Beverage Ice Machines. (IB0600C/IB0800C/IB1000C) 0 to 20 feet (0 to 6.
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Section 2 Installation Instructions Step 4 Connecting the line set. To prevent oxidation of the copper, purge line set and condensing unit with dry nitrogen while brazing. Connect The Line Set To The Ice Machine Head Section ! Warning The ice machine head section contains refrigerant charge. The ice machine head section contains three (3) refrigeration valves that must remain closed until proper installation of the line sets is completed.
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Installation Instructions Section 2 Step 5 Pressure Test and Evacuate The Line Set and CVD Condensing Unit Schrader valve core removal tools that allow for removal and installation of the valve cores without removing manifold gauge set hoses are recommended to decrease the evacuation time. Leave the line set shut off valves closed (front seated). Pressure test the line sets and CVD condensing unit with 150 psig of dry nitrogen.
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Section 2 Installation Instructions Verify O-ring in schrader valve caps are intact and reinstall on shut off valves to prevent refrigerant leakage. Replace shut off valve access caps and torque to the following specifications. Torque Value’s Stem 18-20 ft. lbs. Caps 12-15 ft. lbs. Schrader Core 1.5-3 in. lbs. Replace cap on receiver service valve and tighten.
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Installation Instructions Section 2 Suction Shut Off Valve Insulation The pre-formed suction shut-off valve insulation is located in the plastic bag taped to the water curtain. A. Verify valve and schrader caps are tightened to specifications (see Step 6). PRE-FORMED INSULATION TIGHTEN VALVE CAPS TO SPECIFICATIONS SV3084 3 Phase Scroll Compressor Rotation CVD2075 Only A trained and qualified technician must verify compressor rotation at equipment startup or compressor warranty will be void.
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Section 2 Installation Instructions Electronic Bin Thermostat Instructions POSITIONING 1. Remove screws. 2. Remove backing on 2 sided tape. 3. Rotate and position vertically. Re-install both screws. FINAL POSITION SHIPS HORIZONTAL TO PROTECT PROBE Bin Thermostat Location CONTROL LOCATION Control Location Part No.
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Installation Instructions Section 2 THIS PAGE INTENTIONALLY LEFT BLANK 2-22 Part No.
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Section 3 Maintenance Component Identification ICE MACHINE HEAD SECTION Q0600C/Q0800C/Q1000C COOL VAPOR VALVE DISTRIBUTION TUBE LIQUID LINE SOLENOID VALVE WATER INLET VALVE EVAPORATOR FLOW CLAMP USED ON REGULAR SIZE CUBE ONLY ICE THICKNESS PROBE RECEIVER SERVICE VALVE RECEIVER SUCTION LINE SHUT-OFF VALVE WATER DUMP VALVE WATER PUMP DRAIN HOSE WATER CURTAIN LIQUID LINE SHUT-OFF VALVE ICE/OFF.
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Maintenance Section 3 ICE MACHINE HEAD SECTION SU1000C - SERVEND UC-300 DISPENSER WATER DISTRIBUTION TUBE RECEIVER SERVICE VALVE SHUT-OFF VALVES OFF/ICE/CLEAN TOGGLE SWITCH COOL VAPOR SOLENOID VALVE WATER PUMP ELECTRICAL COMPARTMENT DUMP VALVE WATER CURTAIN ICE THICKNESS PROBE WATER FLOAT VALVE WATER TROUGH WATER PUMP / FLOAT VALVE ACCESS PANELS SV2080 LIQUID LINE SOLENOID VALVE SV2081 ICE MACHINE HEAD SECTION Q1400C/QDUALC EVAPORATOR WATER PUMP DISTRIBUTION TUBE SUCTION LINE SHUT-OFF VAL
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Section 3 Maintenance ICE MACHINE HEAD SECTION CVD CONDENSING UNIT Q1400C/QDUALC CVD0675/CVD0875/CVD1075/CVD1285/CVD1475 ACCESS VALVES ICE THICKNESS PROBE CONDENSER FAN MOTOR AIR CONDENSER ELECTRICAL COMPARTMENT ICE/OFF/CLEAN TOGGLE WITCH LIQUID LINE AND SUCTION LINE CONNECTION POINTS FLOAT VALVE (WATER INLET) COOL VAPOR VALVE HEAD PRESSURE CONTROL VALVE SUCTION ACCUMULATOR COMPRESSOR SV2085 SV1770LH CVD CONDENSING UNIT CVD CONDENSING UNIT CVD1476 CVD1875/CVD2075 LIQUID LINE AND SUCTION
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Maintenance Section 3 Operational Checks WATER LEVEL GENERAL Q1400C/SU1000C Manitowoc ice machines are factory-operated and adjusted before shipment. Normally, a newly installed ice machine does not require any adjustment.
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Section 3 Maintenance ICE THICKNESS CHECK HARVEST SEQUENCE WATER PURGE After a harvest cycle, inspect the ice cubes in the ice storage bin. The ice thickness probe is factory-set to maintain the ice bridge thickness at 1/8" (3.2 mm). Q0600C/IB0600C/Q0800C/IB0800C/ Q1000C/IB1000C/QDUAL NOTE: Make sure the water curtain is in place when performing this check. It prevents water from splashing out of the water trough.
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Maintenance Section 3 Interior Cleaning and Sanitizing Clean and sanitize the ice machine every six months for efficient operation. If the ice machine requires more frequent cleaning and sanitizing, consult a qualified service company to test the water quality and recommend appropriate water treatment or installation of AuCS® accessory (Automatic Cleaning System). If required, an extremely dirty ice machine may be taken apart for cleaning and sanitizing.
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Section 3 Maintenance CLEANING PROCEDURE Ice machine cleaner is used to remove lime scale or other mineral deposits. It is not used to remove algae or slime. Refer to the “Sanitizing Procedure” for removal of algae and slime. To initiate a cleaning cycle using Manitowoc’s Patented Cleaning Technology use the following procedure. Step 6 When the cleaning process stops, move the toggle switch to OFF position. Refer to “Sanitizing Procedure” on the next page. Step 7** A.
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Maintenance Section 3 SANITIZING PROCEDURE Use sanitizer to remove algae or slime. Do not use it to remove lime scale or other mineral deposits. Step 1 Set the toggle switch to the OFF position after ice falls from the evaporator at the end of a Harvest cycle. Or, set the switch to the OFF position and allow the ice to melt off the evaporator. Step 7 Wait about two minutes or until water starts to flow over the evaporator.
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Section 3 Maintenance AUTOMATIC CLEANING SYSTEM (AuCS®) This accessory monitors ice making cycles and initiates cleaning (or sanitizing) procedures automatically. The AuCS® Accessory can be set to automatically clean or sanitize the ice machine every 2, 4, or 12 weeks. Periodic maintenance must be performed that includes cleaning of sanitizing the bin (or dispenser) and adjacent surface areas, which cannot be contacted by the water distribution system.
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Maintenance Section 3 REMOVAL OF PARTS FOR CLEANING/SANITIZING 4. Use a soft-bristle brush or sponge (NOT a wire brush) to carefully clean the parts. ! Warning Disconnect electric power to the ice machine at the electric switch box before proceeding. ! Warning Wear rubber gloves and safety goggles (and/or face shield) when handling Ice Machine Cleaner or Sanitizer. ! Caution Do not mix Cleaner and Sanitizer solutions together.
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Section 3 Maintenance Splash Shield IB0600C/IB0800C/IB1000C Splash Shield Q1400C/QDUAL 1. Pull forward on left and right nylatch connectors until disengaged from ice machine (connectors remain attached to splash shield). 2. Remove panel from front of ice machine by lifting forward and up. NYLATCH CONNECTORS PULL FORWARD TO DISENGAGE SV1771A Important Splash Shield must be reinstalled to prevent water leakage. Part No. 80-1206-3 1. Remove quarter turn connector from the right side of splash shield. 2.
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Maintenance Section 3 Ice Thickness Probe Water Curtain 1. Gently flex the curtain in the center and remove it from the right side. 1. Compress the side of the ice thickness probe near the top hinge pin and remove it from the bracket. DISCONNECT WIRE LEAD STEP 1 COMPRESS HINGE PIN TO REMOVE STEP 2 SV1213 Water Curtain Removal ICE THICKNESS PROBE SV1591 2. Slide the left pin out. Ice Thickness Probe Removal NOTE: At this point, the ice thickness probe can easily be cleaned.
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Section 3 Maintenance Water Pump Water Pump Q0600C/Q0800C/Q1000C/Q1400C/QDUALC IB0600C/IB0800C/IB1000C ! Warning ! Warning Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply. Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply. 1. Remove water level probe; screw and water trough. 1. Disconnect the water pump power cord. 2.
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Maintenance Section 3 Water Distribution Tube Water Pump SU1000C/SerVend UC-300 Dispenser ! Warning ! Warning Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply. Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding. 1. Remove the clamp from the vinyl water hose on the right side of the distribution tube. 1. Remove top and back access panels from the water pump chimney. 2.
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Section 3 Maintenance Water Level Probe Water Level Probe Q0600C/Q0800C/Q1000C/QDUALC IB0600C/IB0800C/IB1000C 1. Loosen the screw that holds the water level probe in place. The probe can easily be cleaned at this point without proceeding to step 2. 1. Loosen the screw that holds the water level probe in place. The probe can easily be cleaned at this point without proceeding to step 2.
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Maintenance Section 3 Water Trough Removal IB0600C/IB0800C/IB1000C Float Valve Q1400C/SU1000C ! Warning ! Warning Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding. Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding. 1. Turn off the water supply to the ice machine at the water service valve. 1. Remove water level probe screw to avoid damaging the water level probe during water trough removal. 2.
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Section 3 Maintenance Water Trough Removal Q1400C/QDUALC Water Trough Removal SU1000C/SerVend UC-300 Dispenser ! Warning ! Warning Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding. Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding. 1. Remove the quarter turn fasteners (turn counterclockwise) securing the trough in place. 1. Remove the front splash shield, water pump and float valve from the ice machine.
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Maintenance Section 3 Water Dump Valve The water dump valve normally does not require removal for cleaning. To determine if removal is necessary: 1. Locate the water dump valve. 2. Set the toggle switch to ICE. 3. While the ice machine is in the freeze mode, check the dump valve’s clear plastic outlet drain hose for leakage. • If the dump valve is leaking, remove, disassemble and clean it. • If the dump valve is not leaking, do not remove it. Instead, follow the “Cleaning Procedure”.
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Section 3 Maintenance Water Inlet Valve Q0600C/IB0600C/Q0800C/IB0800C/ Q1000C/IB1000C/QDUALC The water inlet valve normally does not require removal for cleaning. Follow the instructions below to determine if removal is necessary. 1. Set the ICE/OFF/CLEAN switch to OFF. Locate the water inlet valve (in the water area of the ice machine). It pours water into the water trough. 2. When the ice machine is off, the water inlet valve must completely stop water flow into the machine. Watch for water flow.
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Maintenance Section 3 Removal from Service/Winterization GENERAL Special precautions must be taken if the ice machine head section is to be removed from service for an extended period of time or exposed to ambient temperatures of 32°F (0°C) or below. CVD 1476 WATER COOLED CONDENSING UNIT 1. Place the ice machine toggle switch into the OFF position. 2. “Front seat” (shut off) the receiver service valve. Hang a tag on the switch as a reminder to open the valve before restarting. 3.
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Section 4 Ice Machine Sequence of Operation Q0600C/IB0600C/Q0800C/IB0800C Q1000C/IB1000C/SU1000C INITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF 1. Water Purge Before the compressor starts, the water pump and water dump solenoid are energized for 45 seconds, to completely purge the ice machine of old water. This feature ensures that the ice making cycle starts with fresh water.
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Ice Machine Sequence of Operation Section 4 HARVEST SEQUENCE AUTOMATIC SHUT-OFF 5. Water Purge 7. Automatic Shut-Off The water pump continues to run, and the water dump valve energizes for 45 seconds to purge the water in the sump trough. The water fill valve energizes (turns on) for the last 15 seconds of the 45-second water purge. Ice Machine Section: When the storage bin is full at the end of a harvest sequence, the sheet of cubes fails to clear the water curtain and will hold it open.
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Section 4 Ice Machine Sequence of Operation Ice Making Sequence of Operation Q1400C INITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF 1. Water Purge Before the refrigeration system starts, the water pump and water dump solenoid are energized for 45 seconds, to completely purge the ice machine of old water. This feature ensures that the ice making cycle starts with fresh water. HARVEST SEQUENCE 4.
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Ice Machine Sequence of Operation Section 4 Ice Making Sequence of Operation QDUALC INITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF 1. Water Purge Before the refrigeration system starts, the water pump and water dump solenoid are energized for 45 seconds, to completely purge the ice machine of old water. This feature ensures that the ice making cycle starts with fresh water.
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Section 4 Ice Machine Sequence of Operation AUTOMATIC SHUT-OFF 7. Automatic Shut-Off Ice Machine Head Section: When the storage bin is full at the end of a harvest sequence, the sheet of cubes fails to clear either one or both water curtains. After one or both water curtains are held open for 7 seconds the ice machine shuts off.
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Ice Machine Sequence of Operation Section 4 THIS PAGE INTENTIONALLY LEFT BLANK 4-6 Part No.
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Section 5 Water System Ice Making Sequence of Operation Q0600C/IB0600C/Q0800C/IB0800C/ Q1000C/IB1000C/QDUALC INITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF 1. Before the ice machine starts, the water pump and water dump solenoid are energized for 45 seconds to purge old water from the water trough. This ensures that the ice-making cycle starts with fresh water. The water fill valve energizes after the 45second water purge, and remains on until the water level probe is satisfied. 3.
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Water System Ice Making Sequence of Operation • HARVEST CYCLE 4. The water pump and water dump solenoid are energized for 45 seconds to purge the water from the water trough. The water fill valve energizes for the last 15 seconds of the 45-second purge cycle, to flush sediment from the bottom of the water trough. 5. After the 45-second purge, the water pump and water dump valve de-energize. NOTE: The control board has an adjustable water purge in the harvest cycle.
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Section 5 Water System Ice Making Sequence of Operation Q1400C/SU1000C FREEZE CYCLE INITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF 1. Before the ice machine starts, the water pump and water dump solenoid are energized for 45 seconds to purge old water from the water trough. This ensures that the ice-making cycle starts with fresh water. 2. To pre-chill the evaporator, there is no water flow over the evaporator for the first 30 seconds of the freeze cycle. 3.
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Water System Ice Making Sequence of Operation Section 5 AUTOMATIC SHUT-OFF HARVEST CYCLE 4. The water pump and water dump solenoid are energized for 45 seconds to purge the water from the water trough. There is no water flow during an automatic shut-off. 5. After the 45-second purge, the water pump and water dump valve de-energize. NOTE: The control board for SU1000C has an adjustable water purge in the harvest cycle. This permits a 15, 30 or 45 second purge cycle.
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Section 6 Electrical System Energized Parts Charts Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/SU1000C Ice Making Sequence Of Operation 1 Control Board Relays 2 3 4 Water Pump Water Fill Valve On Off On On Off Open/ Closed2 On3 45 Seconds Off On On Off On Closed On3 5 Seconds Off Off On Closed On3 30 Seconds Off May cycle On/ Off during first 45 sec.
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Electrical System Section 6 Energized Parts Charts Q1400C Ice Making Sequence Of Operation 1 Water Pump START-UP 1 1. Water Purge FREEZE SEQUENCE 2. Pre-Chill Control Board Relays 2 3 4 Cool Cool Vapor Water Vapor Valve Dump Valve Valve (Right) (Left) 5 Condensing Unit LPC* Contactor Liquid Line Solenoid Valve Contactor Coil Compressor/ Condenser Fan Motor Length Of Time On Off Off On Off Open Off 45 Seconds Off Off Off Off On Closed On2 30 Seconds 3.
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Section 6 Electrical System Energized Parts Charts QDUALC Ice Making Sequence Of Operation 1 2 Control Board Relays 3 4 5 Liquid Cool Dump Line Vapor Solenoid Solenoid Valve 1 Valve 6 Condensing Unit LPC* Contactor Cool Vapor Valve 2 Contactor Coil Compressor/ Condenser Fan Motor Length Of Time Water Pump Water Fill Valve On Off On Off On On Closed On 45 Sec. Off On Off On On On Closed On2 5 Sec. Off On until Water Sensed Off On Off Off Closed On2 30 Sec.
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Electrical System Section 6 Wiring Diagrams The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the ice machine which you are servicing. ! Warning Always disconnect power before working on electrical circuitry.
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Section 6 Electrical System ICE MACHINE HEAD SECTION Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C 115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph (Diagram Shown During Freeze Cycle) WATER VALVE SEE SERIAL PLATE FOR VOLTAGE (21) (20) L2 (N) (22) L1 GROUND (61) COOL VAPOR VALVE (60) 3 (77) 4 (80) 2 1 (76) DUMP VALVE 5 (81) WATER PUMP (57) (98) TRANS (9) FUSE (7A) (55) (58) (56) 1C ICE THICKNESS PROBE (83) (8) LIQUID LINE SOLENOID (97) 1F WATER LEVEL PROBE 1G LOW DC VOLTAGE PLUG WATER L
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Electrical System Section 6 ICE MACHINE HEAD SECTION IB0600C/IB0800C/IB1000C with Electronic Bin Thermostat 115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph (Diagram Shown During Freeze Cycle) WATER VALVE SEE SERIAL PLATE FOR VOLTAGE (21) (20) L2 (N) (22) L1 GROUND (61) COOL VAPOR VALVE (60) 3 (77) 4 (80) 2 DUMP VALVE 1 (76) 5 WATER PUMP (57) (9) (98) TRANS (81) FUSE (7A) (55) (58) (8) LIQUID LINE SOLENOID (56) 1C ICE THICKNESS PROBE (83) (97) 1F WATER LEVEL PROBE 1G LOW DC VOLTAG
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Section 6 Electrical System SU1000C 115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph (Diagram Shown During Freeze Cycle) SEE SERIAL PLATE FOR VOLTAGE L2 (N) L1 GROUND (61) COOL VAPOR VALVE (60) 3 (77) (80) 4 2 DUMP VALVE 1 5 (76) (75) (82) (81) WATER PUMP (57) (98) TRANS (9) FUSE (7A) (58) (55) (83) LIQUID LINE SOLENOID 1C ICE THICKNESS PROBE (56) 1F (75) NOT USED LOW DC VOLTAGE PLUG (62) (63) (65) BIN SWITCH LIGHT HARVEST LIGHT/ SAFETY LIMIT CODE (68) TOGGLE SWITCH (67) (66) (80)
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Electrical System Section 6 Q1400C 115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph (Diagram Shown During Freeze Cycle) SEE SERIAL PLATE FOR VOLTAGE L2 (N) COOL VAPOR VALVE (LEFT) L1 GROUND (61) (91) (60) 3 (77) (20) COOL VAPOR VALVE (RIGHT) (92) 4 2 1 DUMP VALVE (81) (76) 5 (57) TRANS (82) WATER PUMP (98) (99) (83) (80) FUSE (7A) (58) LIQUID LINE SOLENOID 1C ICE THICKNESS PROBE (56) (97) 1B RESISTOR 1A (80) (75) LOW DC VOLTAGE PLUG RIGHT CURTAIN LEFT CURTAIN (62) (63) HARVEST LIGHT
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Section 6 Electrical System QDUALC 115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph (Diagram Shown During Freeze Cycle) L1 L2 (N) (75) (82) (56) GROUND (97) (58) WATER PUMP (57) (99) (98) (20) (60) WATER FILL SOLENOID 2 1 (55) (92) (22) 3 4 (81) (76) DUMP SOLENOID 5 6 (83) LIQUID LINE SOLENOID (62) (80) (77) COOL VAPOR VALVE 2 ICE THICKNESS PROBE (61) (91) WATER LEVEL PROBE COOL VAPOR VALVE 1 (19) (1) (23) (24) (22) (2) CLEAN OFF CURTAIN SWITCH 1 ICE (20 CURTAIN SWITCH 2 SV3075 Part
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Electrical System Section 6 CONDENSING UNIT CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/CVD1476/CVD1875/CVD2075 208-230V/60Hz/1Ph or 230V/50Hz/1Ph (Diagram Shown During Freeze Cycle) L1 GROUND L2 (N) COMPRESSOR CRANKCASE HEATER (94) (95) (74) (96) HIGH PRESSURE CUTOUT CONTACTOR COIL LOW PRESSURE SWITCH FAN MOTOR (85) CONTACTOR CONTACTS (97) FAN CYCLE CONTROL CONTACTOR CONTACTS RUN CAPACITOR FAN MOTOR *CVD675.
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Section 6 Electrical System CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/CVD1476/CVD1875/CVD2075 208-230V/60Hz/3Ph (Diagram Shown During Freeze Cycle) L1 L3 L2 COMPRESSOR CRANKCASE HEATER (94) (95) *CVD1475 & CVD2075 DO NOT USE A COMPRESSOR CRANKCASE HEATER (96) HIGH PRESSURE CUTOUT L1 LOW PRESSURE SWITCH CONTACTOR COIL (74) L2 L3 CONTACTOR T3 COMPRESSOR FAN MOTOR T2 T1 FAN CYCLE CONTROL (85) (97) *CVD675, CVD1476 DO NOT HAVE A FAN CYLE CONTROL *CVD1476 DOES NOT HAVE A FAN MOTOR RUN CAPACITOR
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Electrical System Section 6 Electronic Control Boards AC LINE VOLTAGE ELECTRICAL PLUG AC LINE VOLTAGE ELECTRICAL PLUG 7 AMP FUSE Green R-BIN SWITCH LIGHT Green L-BIN SWITCH LIGHT AuCS PLUG Red ICE THICKNESS PROBE MAIN FUSE HARVEST LIGHT/ SAFETY LIMIT CODE LIGHT 1C 1B DUAL 1A WATER LEVEL PROBE SINGLE SINGLE OR DUAL EVAPORATOR ICE MACHINE SETTING AuCS PLUG CLEAN LIGHT Green WATER LEVEL PROBE LIGHT Green BIN SWITCH LIGHT HARVEST LIGH SAFETY LIMIT CODE LIGHT Red ICE THICKNESS PROBE (3/16”
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Section 6 Electrical System Component Specifications and Diagnostics Three-Minute Delay CONTROL BOARD Q0600C/IB0600C/Q0800C/IB0800C/ Q1000C/IB1000C/SU1000C/QDUALC All QuietQube® control boards incorporate the following features. Refer to “Sequence of Operation” for additional information specific to your model. Harvest/Safety Limit Light This light’s primary function is to be on as water contacts the ice thickness probe during the freeze cycle, and remain on throughout the entire harvest cycle.
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Electrical System Section 6 ELECTRONIC BIN THERMOSTAT Function The temperature control opens the bin switch circuit when ice contacts the sensor. When ice no longer contacts the sensor, the circuit closes and the ice machine starts.
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Section 6 Electrical System Differential, Anti-Short Cycle Delay, Temperature Offset, or Sensor Failure Operation To set or verify the Differential, Anti-Short Cycle Delay, Temperature Offset or Sensor Failure Operation use the following method. Factory Preset Temperature Control Code Settings as follows: 1. Press and hold MENU until the display changes to flashing SP. 2. Press up and down (arrows) repeatedly until the desired function is displayed. 3. Press MENU to display the function’s current value.
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Electrical System Section 6 MAIN FUSE BIN SWITCH Function Function The control board fuse stops ice machine operation if electrical components fail causing high amp draw. Movement of the water curtain controls bin switch operation. The bin switch has two main functions: 1. Terminating the harvest cycle and returning the ice machine to the freeze cycle. Specifications The main fuse is 250 Volt, 7 amp.
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Section 6 OHM Test 1. Disconnect the bin switch wires to isolate the bin switch from the control board. 2. Connect an ohmmeter to the disconnected bin switch wires. 3. Cycle the bin switch open and closed numerous times by opening and closing the water curtain. NOTE: To prevent misdiagnosis: • Always use the water curtain magnet to cycle the switch (a larger or smaller magnet will affect switch operation).
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Electrical System Section 6 ICE/OFF/CLEAN TOGGLE SWITCH ICE/OFF/CLEAN TOGGLE SWITCH Q0600C/IB0600C/Q0800C/IB0800C/ Q1000C/IB1000C/SU1000C/Q1400C QDUALC Function The switch is used to place the ice machine in ICE, OFF or CLEAN mode of operation. Function The switch is used to place the ice machine in ICE, OFF or CLEAN mode of operation. Specifications Double-pole, double-throw switch. The switch is connected into a varying low D.C. voltage circuit.
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Section 6 Electrical System Ice Thickness Probe Cleaning Ice Thickness Probe (Harvest Initiation) HOW THE PROBE WORKS Manitowoc’s electronic sensing circuit does not rely on refrigerant pressure, evaporator temperature, water levels or timers to produce consistent ice formation. As ice forms on the evaporator, water (not ice) contacts the ice thickness probe. After the water completes this circuit across the probe continuously for 6-10 seconds, a harvest cycle is initiated.
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Electrical System Section 6 DIAGNOSING ICE THICKNESS CONTROL CIRCUITRY Ice Machine Does Not Cycle Into Harvest When Water Contacts The Ice Thickness Control Probe Step 1 Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch to OFF and back to ICE. Wait until the water starts to flow over the evaporator. Step 2 Clip the jumper wire leads to the ice thickness probe and any cabinet ground.
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Section 6 Electrical System Ice Machine Cycles Into Harvest Before Water Contact With The Ice Thickness Probe Step 1 Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch to OFF and back to ICE. Wait until the water starts to flow over the evaporator, then monitor the harvest light. Step 2 Disconnect the ice thickness probe from the control board at terminal 1C.
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Electrical System Section 6 Water Level Control Circuitry FREEZE CYCLE CIRCUITRY WATER LEVEL PROBE LIGHT Q0600C/IB0600C/Q0800C/IB0800C Q1000C/IB1000C/QDUALC The water level probe circuit can be monitored by watching the water level light. The water level light is on when water contacts the probe, and off when no water is in contact with the probe. The water level light functions any time power is applied to the ice machine, regardless of toggle switch position.
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Section 6 Electrical System DIAGNOSING WATER LEVEL CONTROL CIRCUITRY Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/QDUAL Problem: Water Trough Overfilling During The Freeze Cycle Step 1 Start a new freeze sequence by moving the ICE/ OFF/CLEAN toggle switch to OFF, then back to ICE. Step 2 Wait until the freeze cycle starts (approximately 45 seconds, the freeze cycle starts when the compressor energizes) then connect a jumper from the water level probe to any cabinet ground.
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Electrical System Section 6 Problem: Water Trough Overfilling During The Freeze Cycle (continued) Step 3 Allow ice machine to run. Disconnect the water level probe from control board terminal 1F, and connect a jumper wire from terminal 1F to any cabinet ground. 1 Remember if you are past 6 minutes from starting, the ice machine will go into a freeze cycle water inlet valve safety shut-off mode, and you will be unable to complete this test.
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Section 6 Electrical System Problem: Water Will Not Run Into The Sump Trough During The Freeze Cycle Step 1 Verify water is supplied to the ice machine, and then start a new freeze sequence by moving the ICE/ OFF/CLEAN toggle switch to OFF then back to ICE. Step 2 Wait until the freeze cycle starts (approximately 45 seconds, the freeze cycle starts when the compressor energizes), and then refer to chart. Important This restart must be done prior to performing diagnostic procedures.
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Electrical System Section 6 Diagnosing An Ice Machine That Will Not Run Diagnosing A Condensing Unit That Will Not Run ICE MACHINE HEAD SECTION CONDENSING UNIT Q0600C/IB0600C/Q0800C/IB800C/ Q1000C/IB1000C/SU1000C/Q1400C/QDUALC CVD0675/CVD0875/CVD1075/CVD1285/ CVD1475/CVD1875/CVD2075 ! Warning High (line) voltage is applied to the control board (terminals #55 and #56) at all times. Removing control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board.
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Section 6 Electrical System COMPRESSOR ELECTRICAL DIAGNOSTICS Determine if the Compressor is Seized The compressor will not start or will trip repeatedly on overload. Check the amp draw while the compressor is trying to start. Check Resistance (Ohm) Values COMPRESSOR DRAWING LOCKED ROTOR NOTE: Compressor windings can have very low ohm values. Use a properly calibrated meter. The two likely causes of this are: Perform the resistance test after the compressor cools.
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Electrical System Section 6 Diagnosing Start Components If the compressor attempts to start, or hums and trips the overload protector, check the start components before replacing the compressor. CAPACITOR • Visual evidence of capacitor failure can include a bulged terminal end or a ruptured membrane. Do not assume a capacitor is good if no visual evidence is present. • A good test is to install a known good substitute capacitor. • Use a capacitor tester when checking a suspect capacitor.
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Section 7 Refrigeration System QuietQube® Tubing Schematic Q0600C/Q0800C/Q1000C Condensing Unit SUCTION LINE FILTER COMPRESSOR CONDENSER ACCUMULATOR HEAD PRESSURE CONTROL VALVE S TRAP REQUIRED 21’ OR GREATER RISE Ice Machine Head Section SUCTION SHUT-OFF VALVE LIQUID LINE SHUT-OFF VALVE EVAPORATOR HEAT EXCHANGER TXV COOL VAPOR VALVE LLSV DRIER CHECK VALVE RECEIVER SERVICE VALVE Part No.
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Refrigeration System Section 7 IB0600C/IB0800C/IB1000C/SU1000C Condensing Unit SUCTION LINE FILTER COMPRESSOR CONDENSER HEAD PRESSURE CONTROL VALVE ACCUMULATOR S TRAP REQUIRED 21’ OR GREATER RISE Ice Machine Head Section SUCTION SHUT-OFF VALVE LIQUID LINE SHUT-OFF VALVE EVAPORATOR HEAT EXCHANGER TXV COOL VAPOR VALVE LLSV DRIER CHECK VALVE RECEIVER SERVICE VALVE RECEIVERS 7-2 SV3098 Part No.
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Section 7 Refrigeration System Q1400C/QDUALC Condensing Unit SUCTION FILTER COMPRESSOR CONDENSER ACCUMULATOR CVD1476 ONLY WATER REGULATING VALVE HEAD PRESSURE CONTROL VALVE CVD1476 ONLY CONDENSER WATER OUTLET S TRAP REQUIRED 21’ OR GREATER RISE Ice Machine Head Section SUCTION SHUT-OFF VALVE LIQUID LINE SHUT-OFF VALVE HEAT EXCHANGER EVAPORATOR EVAPORATOR TXV LLSV COOL VAPOR VALVE COOL VAPOR VALVE DRIER RECEIVER SERVICE VALVE CHECK VALVE RECEIVER Part No.
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Refrigeration System Refrigeration System Diagnostics Section 7 REFRIGERATION SYSTEM OPERATION The refrigerant enter the ice machine head section and is store in the receiver. Liquid refrigerant leaves the receiver through a dip tube and passes through the line drier and liquid line solenoid valve. The refrigerant then passes through the heat exchanger where the liquid is sub-cooled before delivery to the TXV.
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Section 7 Refrigeration System Suction Accumulator Operation Refrigerant Charge Liquid refrigerant collects in the suction accumulator during the harvest cycle and is removed during the freeze cycle. The liquid refrigerant is returned to the compressor through a screen and orifice in the suction accumulator J tube. Passing the liquid through the orifice causes a pressure drop; the liquid flashes to a vapor and creates a refrigeration affect.
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Refrigeration System BEFORE BEGINNING SERVICE Ice machines may experience operational problems only during certain times of the day or night. A machine may function properly while it is being serviced, but malfunctions later. Information provided by the user can help the technician start in the right direction, and may be a determining factor in the final diagnosis. Ask these questions before beginning service: • • Section 7 2. Refer to the appropriate 24 Hour Ice Production Chart.
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Section 7 Refrigeration System INSTALLATION/VISUAL INSPECTION CHECKLIST Possible Problem Ice machine is not level Condenser is dirty Water filtration is plugged (if used) Water drains are not run separately and/or are not vented Line set is improperly installed Corrective Action Level the ice machine Clean the condenser Install a new water filter Run and vent drains according to the Installation Manual Reinstall according to the Installation Manual WATER SYSTEM CHECKLIST A water-related problem often ca
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Refrigeration System Section 7 ICE FORMATION PATTERN IB1000C ONLY Evaporator ice formation pattern analysis is helpful in ice machine diagnostics. Tubing routing for the IB1000C evaporator is different. The evaporator outlet is at the bottom of the evaporator. Extremely Thin at the Evaporator Outlet will first be visible at the bottom and then the right side of the evaporator. Extremely Thin at the Evaporator Inlet will first be visible several inches above the bottom of the evaporator.
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Section 7 Refrigeration System Important The Q1400C & QDUALC model machines have left and right expansion valves and separate evaporator circuits. These circuits operate independently from each other. Therefore, one may operate properly while the other is malfunctioning. Example: If the left expansion valve is starving, it may not affect the ice formation pattern on the entire right side of the evaporator. 2.
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Refrigeration System Section 7 SAFETY LIMITS Safety Limit Stand-By Mode: General (QDUALC ONLY) In addition to standard safety controls, such as high pressure cut-out, the control board has two built in safety limit controls which protect the ice machine from major component failures. There are two control boards with different safety limit sequences. The microprocessor chip can identify the control boards. Current production control boards have an orange label on the control board microprocessor.
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Section 7 Refrigeration System Safety Limit Indication Control Board with Black Microprocessor Control Board with Orange Label on Microprocessor When a safety limit condition is exceeded for 3 consecutive cycles the ice machine stops and the harvest light on the control board continually flashes on and off. Use the following procedures to determine which safety limit has stopped the ice machine.
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Refrigeration System Section 7 Analyzing Why Safety Limits May Stop the Ice Machine According to the refrigeration industry, a high percentage of compressors fail as a result of external causes. These can include: flooding or starving expansion valves, dirty condensers, water loss to the ice machine, etc. The safety limits protect the ice machine (primarily the compressor) from external failures by stopping ice machine operation before major component damage occurs.
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Section 7 Refrigeration System Safety Limit #1 Control Board with Black Microprocessor - Freeze Time exceeds 60 minutes for 3 consecutive freeze cycles or Control Board with Orange Label on Microprocessor - Freeze time exceeds 60 minutes for 6 consecutive freeze cycles. Possible Cause Improper installation Water system Electrical system Refrigeration system SAFETY LIMIT NOTES • Because there are many possible external problems, do not limit your diagnosis to only the items listed in this chart.
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Refrigeration System Section 7 Safety Limit #2 Control Board with Black Microprocessor - Harvest time exceeds 3.5 minutes for 3 consecutive harvest cycles. or Control Board with Orange Label on Microprocessor - Harvest time exceeds 3.5 minutes for 500 consecutive harvest cycles. QDUALC ONLY - Harvest cycle time exceeds 7 minutes for 3 consecutive harvest cycles.
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Section 7 Refrigeration System 3. Perform an actual discharge pressure check. ANALYZING DISCHARGE PRESSURE DURING FREEZE OR HARVEST CYCLE Procedure 1. Determine the ice machine operating conditions: Air temp. entering condenser Air temp. around ice machine Water temp. entering sump trough ______ ______ ______ 2. Refer to Cycle Times/24 Hour Ice Production/ Refrigeration Pressure Chart for ice machine being checked.
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Refrigeration System Section 7 ANALYZING SUCTION PRESSURE DURING FREEZE CYCLE The suction pressure gradually drops throughout the freeze cycle. The actual suction pressure (and drop rate) changes as the air and water temperatures entering the ice machine change. This affects freeze cycle times. NOTE: Analyze discharge pressure before analyzing suction pressure. High or low discharge pressure may be causing high or low suction pressure.
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Section 7 Refrigeration System Freeze Cycle Suction Pressure High Checklist Possible Cause Improper installation Discharge pressure Improper refrigerant charge Other Check/Correct See “Installation/Visual Inspection Checklist” Discharge pressure is too high, and is affecting suction pressure (See “Freeze Cycle Discharge Pressure High Checklist” Overcharged Wrong type of refrigerant Non condensables in system Non-Manitowoc components in system Cool vapor valve leaking TXV flooding (check bulb mounting) D
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Refrigeration System ANALYZING FREEZE CYCLE SUCTION LINE TEMPERATURE Suction line temperature cannot diagnose an ice machine. However, comparing this temperature during the freeze cycle, along with using Manitowoc’s Refrigeration System Operational Analysis Table, can help diagnose an ice machine malfunction. The actual temperature of the suction line varies by model, and will change throughout the freeze cycle. This makes documenting the “normal” suction line temperature difficult.
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Section 7 Refrigeration System COOL VAPOR VALVE Analysis General The valve can fail in two positions: The cool vapor valve is an electrically operated valve that opens when energized, and closes when deenergized. • Valve will not open in the harvest cycle. • Valve remains open during the freeze cycle. Normal Operation The valve is de-energized (closed) during the freeze cycle and energized (open) during the harvest cycle.
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Refrigeration System REFRIGERATION COMPONENT DIAGNOSTIC CHART General All electrical and water related problems must be corrected before these chats will work properly. These tables must be used with charts, checklists and other references to eliminate refrigeration components not listed and external items and problems that will cause good refrigeration components to appear defective. The tables list four different defects that may affect the ice machine’s operation.
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Section 7 Refrigeration System REFRIGERATION COMPONENT DIAGNOSTIC CHART Single Expansion Valve Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/SU1000C This table must be used with charts, checklists and other references to eliminate refrigeration components not listed on the table and external items and problems, which can cause good refrigeration components to appear defective.
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Refrigeration System Section 7 Dual Expansion Valve - Q1400C/QDUALC This table must be used with charts, checklists and other references to eliminate refrigeration components not listed on the table and external items and problems, which can cause good refrigeration components to appear defective.
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Section 7 Refrigeration System HEADMASTER CONTROL VALVE Harvest Cycle Operation Function During the harvest cycle the cool vapor valve opens and allows refrigerant from the top of the receiver tank to enter the evaporator. The refrigerants change of state (from vapor to liquid in the evaporator) releases the heat necessary for the harvest cycle. The headmaster control valve maintains the correct discharge pressure and liquid line temperature in the freeze and harvest cycles.
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Refrigeration System Section 7 Diagnosing Air Cooled Condensing Units FREEZE CYCLE 1. Determine the air temperature entering the condenser. 2. Determine if the head pressure is high or low in relationship to the outside temperature. (Refer to the proper “Operational Pressure Chart”) If the air temperature is below 70°F (21.1°C), the head pressure control will modulate to maintain the correct liquid line temperature and head pressure. 3.
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Section 7 Refrigeration System Procedure Diagnosing Air Cooled Condensing Units HARVEST CYCLE The headmaster control valve diverts the compressor discharge gas to the ice machine receiver in the harvest cycle. All refrigerant flow through the condenser in the harvest cycle stops. Symptoms of a headmaster valve that will not seat 100% closed (completely bypass the condenser) in the harvest cycle are: • Freeze cycle suction and discharge pressure are normal. • The control board indicates safety limit #2.
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Refrigeration System Section 7 Diagnosing Water Cooled Condensing Unit REFRIGERANT CHARGE VERIFICATION FREEZE CYCLE QuietQube® remote ice machines require the correct amount of refrigerant (name plate charge) to operate correctly at all ambient conditions. The water regulating valve maintains the freeze cycle discharge pressure. Refer to water regulating valve diagnostics. HARVEST CYCLE The headmaster control valve diverts the compressor discharge gas to the ice machine receiver in the harvest cycle.
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Section 7 Pressure Control Specifications and Diagnostics Refrigeration System FAN CYCLE CONTROL WATER REGULATING VALVE CVD0875/CVD1075/CVD1285/CVD1475/ CVD1875/CVD2075 Function Function The water regulating valve maintains the freeze cycle discharge pressure. The valve setting for the CVD1476 condensing unit is 240 psig. 1. Determine if the head pressure is high or low (refer to Operational Pressure Chart”) Energizes and de-energizes the condenser fan motor.
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Refrigeration System Section 7 LOW PRESSURE CUTOUT (LPCO) CONTROL HIGH PRESSURE CUT-OUT (HPCO) CONTROL CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/ CVD1476/CVD1875/CVD2075 CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/ CVD1476/CVD1875/CVD2075 Function Function Energizes and de-energizes the contactor coil when suction pressure rises above or falls below setpoint. Stops the ice machine if subjected to excessive highside pressure.
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Section 7 Refrigeration System Cycle Time/24 Hour Ice Production/ Refrigerant Pressure Charts These charts are used as guidelines to verify correct ice machine operation. Accurate collection of data is essential to obtain the correct diagnosis. • Refer to “OPERATIONAL ANALYSIS CHART” for the list of data that must be collected for refrigeration diagnostics.
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Refrigeration System Section 7 Q0600C/CVD0675 SERIES REMOTE AIR COOLED IB0600C/CVD0675 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. NOTE: These characteristics may vary depending on operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C -20 to 70/ -29 to 21.1 80/26.7 90/32.2 100/37.8 Freeze Time Water Temperature °F/°C 50/10.
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Section 7 Refrigeration System Q0800C/CVD0875 SERIES REMOTE AIR COOLED IB0800C/CVD0875 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. NOTE: These characteristics may vary depending on operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C -20 to 70/ -29 to 21.1 80/26.7 90/32.2 100/37.8 Freeze Time Water Temperature °F/°C 50/10.
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Refrigeration System Section 7 Q1000C/CVD1075/CVD1285 SERIES REMOTE AIR COOLED IB1000C/CVD1075/CVD1285 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. NOTE: These characteristics may vary depending on operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C -20 to 70/ -29 to 21.1 80/26.7 90/32.2 100/37.
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Section 7 Refrigeration System SU1000C/CVD1075/CVD1285 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C -20 to 70/ -29 to 21.1 80/26.7 90/32.2 100/37.8 Freeze Time Water Temperature °F/°C 50/10.0 70/21.1 90/32.2 9.9-10.6 10.8-11.6 11.8-12.6 10.1-10.9 10.6-11.4 11.6-12.5 10.9-11.7 11.5-12.3 12.6-13.5 12.1-13.0 12.8-13.7 14.0-15.0 Harvest Time .75-2.
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Refrigeration System Section 7 Q1400C/CVD1475 SERIES REMOTE AIR COOLED Q1400C/CVD1476 SERIES REMOTE WATER COOLED NOTE: These characteristics may vary depending on operating conditions. NOTE: These characteristics may vary depending on operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C -20 to 70/ -28.9 to 21.1 90/32.2 100/37.8 110/43.
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Section 7 Refrigeration System QDUALC/CVD1875 SERIES REMOTE AIR COOLED QDUALC/CVD2075 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. NOTE: These characteristics may vary depending on operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C -20 to 70/ -29 to 21.1 90/32.2 100/37.8 110/43.3 Freeze Time Water Temperature °F/°C 50/10.
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Refrigeration System Section 7 Refrigerant Recovery/Evacuation and Recharging Do not purge refrigerant to the atmosphere. Capture refrigerant using recovery equipment. Follow the manufacturer’s recommendations. REFRIGERANT RECOVERY CONNECTIONS Recovery/Evacuation 1. Place the toggle switch in the OFF position and disconnect all power to the ice machine and condensing unit. Important Manitowoc Ice, Inc. assumes no responsibility for the use of contaminated refrigerant.
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Section 7 Refrigeration System CHARGING PROCEDURES 1. Verify the ICE/OFF/CLEAN toggle switch is in the OFF position. 2. Close the vacuum pump valve and the low side manifold gauge valve. 3. Open the charging cylinder and add the proper refrigerant charge (shown on nameplate) into the system high side (receiver service valve and discharge line shut off valve). 4. If the high side does not take the entire charge, close the high side on the manifold gauge set.
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Refrigeration System SYSTEM CONTAMINATION CLEAN-UP GENERAL This section describes the basic requirements for restoring contaminated systems to reliable service. Important Manitowoc Ice, Inc. assumes no responsibility for the use of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company. Section 7 If either condition is found, or if contamination is suspected, use a Total Test Kit from Totaline or a similar diagnostic tool.
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Section 7 Refrigeration System Mild System Contamination Cleanup Procedure Severe System Contamination Cleanup Procedure 1. Replace any failed components. 1. Remove the refrigerant charge. 2. If the compressor is good, change the oil. 2. Remove the compressor. 3. Replace the liquid line drier and suction filter. 3. Cut copper tubing at the outlet of the cool vapor valve. If burnout deposits are found inside the tubing, replace the cool vapor valve, TXV and head pressure control valve.
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Refrigeration System Section 7 9. Follow the normal evacuation procedure, except replace the evacuation step with the following: Important Dry nitrogen is recommended for this procedure. This will prevent CFC release. A. Pull vacuum to 1000 microns. Break the vacuum with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psi. B. Change the vacuum pump oil. C. Pull vacuum to 500 microns. Break the vacuum with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psi. D.
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Section 7 Refrigeration System REPLACING PRESSURE CONTROLS WITHOUT REMOVING REFRIGERANT CHARGE 3. Cut the tubing of the defective component with a small tubing cutter. This procedure reduces repair time and cost. Use it when any of the following components require replacement, and the refrigeration system is operational and leak-free. 4. Solder the replacement component in place. Allow the solder joint to cool.
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Refrigeration System Section 7 SV1406 Using Pinch-Off Tool 7-42 Part No.
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Section 7 Refrigeration System FILTER-DRIERS Suction Line Filter Drier Liquid Line Filter Drier The suction filter traps particulate only and does not contain a desiccant. The filter needs replacement when: The filter-driers used on Manitowoc ice machines are manufactured to Manitowoc specifications. The difference between Manitowoc driers and off-theshelf driers is in filtration. Manitowoc driers have dirtretaining filtration, with fiberglass filters on both the inlet and outlet ends.
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Refrigeration System Section 7 TOTAL SYSTEM REFRIGERANT CHARGES REFRIGERANT DEFINITIONS Recover Important This information is for reference only. Refer to the ice machine serial number tag to verify the system charge. Serial plate information overrides information listed on this page. Model Q0600C IB0600C Q0800C IB0800C Q1000C IB1000C SU1000C Q1400C QDUALC Condensing Unit Refrigerant Charge (lbs./oz.) CVD6750 11 lbs. / 176 oz. CVD875 12 lbs. / 192 oz. 11 lbs. / 176 oz. CVD1075 CVD1285 12 lbs.
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Section 7 Refrigeration System REFRIGERANT RE-USE POLICY Manitowoc recognizes and supports the need for proper handling, re-use, and disposal of, CFC and HCFC refrigerants. Manitowoc service procedures require recapturing refrigerants, not venting them to the atmosphere. It is not necessary, in or out of warranty, to reduce or compromise the quality and reliability of your customers’ products to achieve this. Important Manitowoc Ice, Inc. assumes no responsibility for use of contaminated refrigerant.
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Refrigeration System Section 7 THIS PAGE INTENTIONALLY LEFT BLANK 7-46 Part No.
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Attend A Manitowoc Factory Service School • Improve Your Service Techniques • Network with Your Peers • 4 1/2 Days of Intensive Training on Manitowoc Ice Machines • Extensive “Hands On” Training on a Variety of Equipment • Breakfast, Lunch and Hotel Room Included with Tuition • Contact Your Distributor or Manitowoc Ice, Inc. for Details OR • Visit Our Website at www.manitowocice.com for School Dates MANITOWOC ICE, INC. 2110 South 26th Street P.O.