Page 1 Manitowoc S Model Ice Machines Technician’s Handbook This manual is updated as new information and models are released. Visit our website for the latest manual. www.manitowocice.com America’s #1 Selling Ice Machine Part Number 80-1479-3 7/10...
Page 3: Safety Notices
Safety Notices As you work on Manitowoc equipment, be sure to pay close attention to the safety notices in this handbook. Disregarding the notices may lead to serious injury and/or damage to the equipment. Throughout this handbook, you will see the following types of safety notices: Warning Text in a Warning b ox alerts yo u to a p otential...
Page 4 NOTE: Text set off as a Note provides you with simple, but useful, extra information about the procedure you are performing. Read These Before Proceeding: ! Caution Proper i nstallation, ca re and ma intenance are essential for maximum performance and trouble- free op eration of you r Manitowo c eq uipment.
Page 5: Table Of Contents
Table of Contents General Information Model Numbers ..... 9 How to Read a Model Number ..10 Ice Cube Sizes .
Page 6: Table Of Contents
Removal from Service/Winterization . . . 57 Self-Contained Air-Cooled Ice Machines 57 Water-Cooled Ice Machines ..58 Remote Ice Machines ... . . 58 Sequence of Operation Self Contained Air or Water Cooled .
Page 7: Table Of Contents
Component Check Procedures Electrical Components ....135 Main Fuse ..... . 135 ICE/OFF/CLEAN Toggle Switch .
Page 8: Table Of Contents
Refrigerant Pressure Charts ..191 S300 Series ....192 S320 Series ....196 S420 Series .
Page 9: Model Numbers
General Information Model Numbers This manual covers the following models: Self-Contained Self-Contained Remote Air-Cooled Water-Cooled SD0302A SD0303W SY0304A SY0305W SD0322A SD0323W SY0324A SY0325W SR0420A SR0421W SD0422A SD0423W SY0424A SY0425W SD0452A SD0453W SY0454A SY0455W SR0500A SR0501W SD0592N SD0502A SD0503W SY0594N SY0504A SY0505W SD0602A SD0603W...
Page 10: How To Read A Model Number
HOW TO READ A MODEL NUMBER # CUBE SIZE CONDENSER TYPE 0 REGULAR AIR-COOLED 1 REGULAR WATER-COOLED 9 REMOTE 2 DICE AIR-COOLED AIR-COOLED 3 DICE WATER-COOLED 4 HALF-DICE AIR-COOLED 5 HALF-DICE WATER-COOLED S Y 1094 N SI ADDITIONAL SPECS PHASE ICE MACHINE M MARINE UNIT ICE MACHINE...
Page 11: Model/Serial Number Location
Prior to using a non -Manitowoc ice sto rage system with other Manitowoc ice machin es, contact th e manufacturer to assu re th eir ice deflector is comp atible wi th Mani towoc ice machines.
Page 12: Serial Breaks
Some specifications have changed with our release of more Energy Efficient machines. The following machines have a serial break to indicate when they became more Energy Efficient. Series Ice Serial Break/Manufacture Date for Machine Energy Efficient Machines S300 110704351 S420 110667970 S450 110670157 S500 110684316...
Page 13: Ice Machine Warranty Information
Ice Machine Warranty Information OWNER WARRANTY REGISTRATION CARD Warranty coverage begins the day the ice machine is installed. Important Complete and mail the OW NER WARRANTY REGISTRATION C ARD as soon as p ossible to validate the installation date. If the OWNER WARRANTY REGISTRATION CARD is not returned, Manitowoc will use the date of sale to the Manitowoc Distributor as the first day of warranty coverage for your new ice machine.
Page 14: Commercial Warranty Coverage
COMMERCIAL WARRANTY COVERAGE Manitowoc Ice, (hereinafter referred to as the "COMPANY") warrants for a period of thirty-six months from the installation date (except as limited below) that new ice machines manufactured by the COMPANY shall be free of defects in material or workmanship...
Page 15 COMPANY within five (5) days from the installation date. To obtain warranty service or information regarding your Product, please contact us at: MANITOWOC ICE 2110 So. 26th St. P.O. Box 1720, Manitowoc, WI 54221-1720 Telephone: 920-682-0161 Fax: 920-683-7585 www.manitowocice.com...
Page 16: Installation
RESIDENTIAL ICE MACHINE LIMITED WARRANTY WHAT DOES THIS LIMITED WARRANTY COVER? Subject to the exclusions and limitations below, Manitowoc Ice, Inc. (“Manitowoc”) warrants to the original consumer that any new ice machine manufactured by Manitowoc (the “Product”) shall be free of defects in material or workmanship for the...
Page 17 WHAT ARE MANITOWOC ICE’S OBLIGATIONS UNDER THIS LIMITED WARRANTY? If a defect arises and Manitowoc receives a valid warranty claim prior to the expiration of the warranty period, Manitowoc shall, at its option: (1) repair the Product at Manitowoc’s cost, including standard...
Page 18 WHAT IS NOT COVERED? This limited warranty does not cover, and you are solely responsible for the costs of: (1) periodic or routine maintenance, (2) repair or replacement of the Product or parts due to normal wear and tear, (3) defects or damage to the Product or parts resulting from misuse, abuse, neglect, or accidents, (4) defects or damage to the Product or parts resulting from...
Page 19 VENT HALL ANITOWOC FFILIATES IABLE ONSUMER THER ERSON NCIDENTAL ONSEQUENTIAL PECIAL AMAGES NCLUDING ITHOUT IMITATION ROFITS EVENUE USINESS RISING ANNER ONNECTED RODUCT REACH IMITED ARRANTY THER AUSE HATSOEVER HETHER ASED ONTRACT THER HEORY IABILITY Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
Page 20 This Page Intentionally Left Blank Part Number 80-1479-3 7/10...
Page 21: Location Of Ice Machine
Installation Warning PERSONAL INJURY POTENTIAL Remove a ll i ce machi ne p anels before lifting a nd installing. Location of Ice Machine The location selected for the ice machine head section must meet the following criteria. If any of these criteria are not met, select another location.
Page 22: Ice Machine Clearance Requirements
Ice Machine Clearance Requirements Self-Contained Self-Contained S300 Air-Cooled Water-Cooled Top/Sides 16" (40.6 cm) 8" (20.3 cm) Back 5" (12.7 cm) 5" (12.7 cm) S320/S450/S500/ Self-Contained Water-Cooled and S600/S850/S1000 Air-Cooled Remote* Top/Sides 8" (20.3 cm) 8" (20.3 cm) Back 5" (12.7 cm) 5"...
Page 23: Ice Machine Heat Of Rejection
Ice Machine Heat of Rejection Heat of Rejection Series Ice Machine Peak Conditioning* S300 3,800 6,000 S320 3,800 6,000 S420/S450 7,000 9,600 S500 7,000 9,600 S600 9,000 13,900 S850 12,000 18,000 S1000 16,000 22,000 S1200 19,000 28,000 S1400 19,000 28,000...
Page 24: Remote Condenser Line Set Installation
REMOTE CONDENSER LINE SET INSTALLATION Remote Single Ice Machine Circuit Line Set* Condenser RT-20-R404A S500 JC0495 RT-35-R404A RT-50-R404A S600 RT-20-R404A S800 JC0895 RT-35-R404A S1000 RT-50-R404A S1400 RL-20-R404A S1600 JC1395 RL-35-R404A S1800 RL-50-R404A *Line Set Discharge Line Liquid Line 1/2" (1.27 cm) 5/16"...
Page 25: Installation Distances
CALCULATING REMOTE CONDENSER INSTALLATION DISTANCES Manitowoc warrants only complete new and NOTE: unused remote packages. Warranty on the refrigeration system will be void if a new ice machine head section is connected to existing (used) tubing or condensers. Line Set Length The maximum length is 100' (30.5 m).
Page 26 Calculated Line Set Distance The maximum calculated distance is 150' (45.7 m). Line set rises, drops, horizontal runs (or combinations of these) in excess of the stated maximums will exceed compressor start-up and design limits. This will cause poor oil return to the compressor. Make the following calculations to make sure the line set layout is within specifications.
Page 27: Lengthening Or Reducing Line Sets
Maximum Line Set Distance Formula Step 1 Measured Rise ____ X 1.7 = ______Calculated Rise (35 ft. Max) Step 2 Measured Drop ____ X 6.6 = ______Calculated Drop (15 ft. Max.) Step 3 Measured Horizontal Distance = _________Horizontal (100 ft. Max.) Distance Step 4 Total Calculated Distance = ________Total Calculated...
Page 28: Connecting A Line Set
CONNECTING A LINE SET 1. Remove the dust caps from the line set, condenser and ice machine. 2. Apply refrigeration oil to the threads on the quick disconnect couplers before connecting them to the condenser. 3. Carefully thread the female fitting to the condenser or ice machine by hand.
Page 29: Component Identification S Model Single Evaporator Models
Component Identification S Model Single Evaporator Models REFRIGERATION EVAPORATOR ACCESS VALVES WATER TOGGLE THICKNESS DISTRIBUTION SWITCH CONTROL TUBE WATER WATER CURTAIN CONTROL BOX TROUGH WATER INLET LOCATION, THE WATER INLET VALVE IS LOCATED IN THE REFRIGERATION COMPARTMENT WATER LEVEL WATER PUMP PROBE Part Number 80-1479-3 7/10...
Page 30: S Model Quad Evaporator Models
S Model Quad Evaporator Models Part Number 80-1479-3 7/10...
Page 31: General
An extremely dirty ice machine must be taken apart for cleaning and sanitizing. Manitowoc Ice Machine Cleaner and Sanitizer are the only products approved for use in Manitowoc ice machines. This Manitowoc Ice Machine has two separate cleaning procedures.
Page 32: Cleaning / Sanitizing Procedure
Cleaning / Sanitizing Procedure ! Caution Use on ly Mani towoc app roved Ice Machi Cleaner and Sanitize r fo r this application (Manitowoc Clea ner p art n umber 9 4-0546-3 a nd Manitowoc Sanitizer part number 94-0565-3). It is a violation of Federal law to use these solutions in a man ner inconsistent with the ir la beling.
Page 33 Wait until the water trough refills and water flows over the evaporator, then add the proper amount of ice machine cleaner. Model Amount of Cleaner S300/S320/S420 3 ounces (90 ml) S450/S500/S600/S850/ 5 ounces (150 ml) S1000/S1200...
Page 34: Parts Removal For Cleaning/Sanitizing
PARTS REMOVAL FOR CLEANING/SANITIZING Single Evaporator Ice Machines A. Remove the water curtain • Gently flex the curtain in the center and remove it from the right side. • Slide the left pin out. B. Remove the ice thickness probe •...
Page 35 Quad Evaporator Ice Machines A.Remove the water trough shield. • Grasp the water trough shield in the center and the left end. • Flex the water trough shield in the center and pull the left end forward until clear of the side wall. Repeat for the right end.
Page 36 Part Number 80-1479-3 7/10...
Page 37 Step 7 Mix a solution of cleaner and warm water. Depending upon the amount of mineral buildup, a larger quantity of solution may be required. Use the ratio in the table below to mix enough solution to thoroughly clean all parts. Solution Type Water Mixed With...
Page 38 Step 12 Use 1/2 of the sanitizer/water solution to sanitize all foodzone surfaces of the ice machine and bin (or dispenser). Use a spray bottle to liberally apply the solution. When sanitizing, pay particular attention to the following areas: • Side walls •...
Page 39 CLEAN position. Step 16 Wait until the water trough refills and water flows over the evaporator (approximately 3 minutes). Add the proper amount of Manitowoc Ice Machine Sanitizer to the water trough by pouring between the water curtain/splash shields and evaporator..
Page 40: Procedure To Clean Heavily Scaled Ice Machines
Procedure to Clean Heavily Scaled Ice Machines Ice machines that are heavily scaled or have not been cleaned on a regular basis will need to run this procedure. GENERAL Clean and sanitize the ice machine every six months for efficient operation. If the i c e machine requires more frequent cleaning and sanitizing, consult a qualified service company to test the water quality and recommend appropriate water treatment.
Page 41 Wait until the water trough refills and water flows over the evaporator, then add the proper amount of ice machine cleaner. Model Amount of Cleaner S300/S320/S420 3 ounces (90 ml) S450/S500/S600/S850/ 5 ounces (150 ml) S1000/S1200...
Page 42 Step 5 Wait until the clean cycle is complete (approximately *35 minutes). then place the toggle switch in the OFF position and disconnect power to the ice machine (and dispenser when used) NOTE: *S3300 Only - 80 minutes.. Warning Disconnect the electric power to the ice machine at the electric service switch box.
Page 43 PARTS REMOVAL FOR CLEANING/SANITIZING Single Evaporator Ice Machines A. Remove the water curtain • Gently flex the curtain in the center and remove it from the right side. • Slide the left pin out. B. Remove the ice thickness probe •...
Page 44 E. Remove the water level probe • Pull the water level probe straight down to disengage. • Lower the water level probe until the wiring connector is visible. • Disconnect the wire lead from the water level probe. • Remove the water level probe from the ice machine.
Page 45 Part Number 80-1479-3 7/10...
Page 46 Quad Evaporator Ice Machines A. Remove panels • Remove both front panels • Remove top panel B. Remove front evaporator shield. • Remove four quarter turn connectors • Remove splash shield C. Remove left and right evaporator top covers. • Remove two thumbscrews from the front of each evaporator top cover.
Page 47 F. Remove distribution tubes. • Distribution tube thumbscrews are retained to prevent loss. Loosen thumbscrews but do not pull thumbscrews out of distribution tube. • Loosen the two outer screws and pull forward on the distribution tube to release from slip joint. •...
Page 48 Part Number 80-1479-3 7/10...
Page 49 Step 7 Mix a solution of cleaner and warm water. Depending upon the amount of mineral buildup, a larger quantity of solution may be required. Use the ratio in the table below to mix enough solution to thoroughly clean all parts. Solution Type Water Mixed With...
Page 50 CLEAN position. Step 15 Wait about two minutes or until water starts to flow over the evaporator. Add the proper amount of Manitowoc Ice Machine Sanitizer to the water trough by pouring between the water curtain/splash shields and evaporator.
Page 51 Solution Water Mixed With Type Sanitizer 6 gal. (23 l) 4 oz (120 ml) sanitizer Step 19 Use 1/2 of the sanitizer/water solution to sanitize all removed components. Use a cloth or sponge to liberally apply the solution to all surfaces of the removed parts or soak the removed parts in the sanitizer/water solution.
Page 52 Ice Thickness Probe & Water Level Probe Clean the probes using the following procedure. 1. Mix a solution of Manitowoc ice machine cleaner and water (2 ounces of cleaner to 16 ounces of water) in a container. 2. Soak probes in container of cleaner/water solution...
Page 53 Water Inlet Valve The water inlet valve normally does not require removal for cleaning. Refer to “Water System Checklist” page 109, if you are troubleshooting water related problems. 1. When the ice machine is off, the water inlet valve must completely stop water flow into the machine. Watch for water flow.
Page 54 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 water trough to determine if the dump valve is leaking.
Page 55 During cleaning, do not stretch or damage the NOTE: spring. 1. Remove the tubing from the dump valve by twisting the clamps off. 2. Remove the valve body, twist off. COIL SPRING PLUNGER NYLON GASKET DIAPHRAM MOUNTING BRACKET VALVE BODY Dump Valve Disassembly Part Number 80-1479-3 7/10...
Page 56 Drain Line Check Valve The drain line check valve (not used on all models) should be inspected and cleaned, whenever the ice machine is cleaned. CHECK VALVE CHECK VALVE ASSEMBLY 1. Remove check valve and tube assembly. A. Tip assembly to right until tubing disengages. B.
Page 57: Removal From Service/Winterization
Removal from Service/Winterization General Special precautions must be taken if the ice machi n e is to be removed from service for an extended period of time or exposed to ambient temperatures of 32°F (0°C) or below. ! Caution If water is al lowed to remain in the ice ma chine in freezing temperatures, se vere damag e to some components could resu lt.
Page 58: Water-Cooled Ice Machines
WATER-COOLED ICE MACHINES 1. Perform steps 1-6 under “Self-Contained Air- Cooled Ice Machines.” 2. Disconnect the incoming water and drain line from the water-cooled condenser. 3. Insert a large screwdriver between the bottom spring coils of the water regulating valve. Pry upward to open the valve.
Page 59: Self Contained Air Or Water Cooled
Sequence of Operation Self Contained Air or Water Cooled SINGLE & QUAD EVAPORATOR MODELS The toggle switch must be in the ice position NOTE: and the water curtain/ice dampers must be in place on the evaporator before the ice machine will start. Initial Start-Up or Start-Up After Automatic Shut-Off 1.
Page 60 Freeze Sequence 3. Prechill The compressor lowers the temperature of the evaporator(s) before the water pump is energized. The water fill valve will remain energized until water contacts the water level probe. Energized Control Board Lights- Single Evaporators = Left Bin (green) Quad Evaporators = All Curtain Switches (green), Water Solenoid (red), Liquid Solenoid (red) 4.
Page 61 Harvest Sequence 5. Water Purge The air compressor (when used) and the harvest valve(s) open at the beginning of the water purge to divert hot refrigerant gas into the evaporator. The water pump continues to run, and the water dump valve energizes to purge the water in the water trough.
Page 62 6. Harvest The air compressor (when used) remains energized and the harvest valve(s) remains open. The refrigerant gas warms the evaporator causing the cubes to slide, as a sheet, off the evaporator and into the storage bin. Energized Control Board Lights- Single Evaporators = Left Bin (green), Harvest (red) Quad Evaporators = All Curtain Switches (green), Liquid Solenoid (red), Harvest (red), All Harvest Valves...
Page 63 Automatic Shut-Off 7. Automatic Shut-Off When the storage bin is full at the end of a harvest sequence, the sheet of cubes fails to clear the water curtain/ice damper and will hold it open. After the water curtain/ice damper is held open for 30 seconds, the ice machine shuts off.
Page 64: Safety Timers
Safety Timers The control board has the following non-adjustable safety timers: • The ice machine is locked into the freeze cycle for 6 minutes before a harvest cycle can be initiated. Freeze lock is bypassed after moving the toggle switch from OFF to ICE position for the first cycle only.
Page 65: Safety Limits
Safety Limits Safety limits are stored and indicated by the control board after three cycles. The number of cycles required to stop the ice machine varies for each safety limit. • Safety Limit 1 - If the freeze time reaches 60 minutes, the control board automatically initiates a harvest cycle.
Page 66 Safety Limit Stand-By Mode (Quad Evaporators Only) The first time a safety limit shut down occurs, (three consecutive long freeze or harvest cycles) the ice machine will turn off for 60 minutes (Stand-By Mode). During the Stand-By Mode the harvest light will be flashing continuously and a safety limit indication can be viewed.
Page 67 Warm Water Rinse Cycle Single evaporator models only - Closing the back of the evaporator allows ice to build up on the rear of the evaporator and the plastic evaporator frame parts. After 200 freeze/harvest cycles have been completed the control board will initiate a warm water rinse. After the 200th harvest cycle ends: •...
Page 68 Self Contained Air & Water-Cooled Single Evaporator Model Energized Parts Chart Ice Making Water Water Length Water Harvest Contactor Condenser Sequence of Inlet Dump Compressor Pump Valve(s) Pump(s)* Coil Fan Motor of Time Valve Valve Operation 35 sec. Start-Up 45 Seconds 1.
Page 69 Self Contained Air & Water-Cooled Single Evaporator Model Energized Parts Chart (Continued) Ice Making Water Water Length Water Harvest Contactor Condenser Sequence of Inlet Dump Compressor Pump Valve(s) Pump(s)* Coil Fan Motor of Time Valve Valve Operation 30 sec. Harvest Sequence May Cycle Factory Set at...
Page 70 Self Contained Water-Cooled Quad Evaporator Model Energized Parts Chart Ice Making Water Length Water Harvest Water Contactor Sequence of Dump Compressor Pumps Valves Pumps Inlet Valve Coil of Time Valves Operation Start-Up Initial Start-Up is 45 Seconds 1. Water Purge 30 Seconds thereafter 2.
Page 71 Self Contained Water-Cooled Quad Evaporator Model Energized Parts Chart (Continued) Ice Making Water Length Water Harvest Water Contactor Sequence of Dump Compressor Pumps Valves Pumps Inlet Valve Coil of Time Valves Operation Harvest Sequence Factory Set at from 30-45 30 Seconds 5.
Page 72: Remotes
REMOTES Single Evaporator Models The toggle switch must be in the ice position NOTE: and the water curtain must be in place on the evaporator before the ice machine will start. 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.
Page 73 2. Refrigeration System Start-Up The compressor and liquid line solenoid valve energize after the 45 second water purge and remain on throughout the entire Freeze and Harvest Sequences. The water fill valve is energized at the same time as the compressor. It remains on until the water level sensor closes for 3 continuous seconds, or until a six-minute time period has expired.
Page 74 Freeze Sequence 3. Prechill The compressor is on for 30 seconds (60 seconds initial cycle) prior to water flow, to prechill the evaporator. Energized Control Board Lights- Left Bin (green) 4. Freeze The water pump restarts after the prechill. An even flow of water is directed across the evaporator and into each cube cell, where it freezes.
Page 75 Harvest Sequence 5. Water Purge 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) and de-energizes (turns off) strictly by time. The water fill valve energizes for the last 15 seconds of the 45-second water purge.
Page 76 Automatic Shut-Off 7. Automatic Shut-Off 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. After the water curtain is held open for 30 seconds, the ice machine shuts off. The ice machine remains off for 3 minutes before it can automatically restart.
Page 77 Remote Air-Cooled Single Evaporator Model Energized Parts Chart Harvest Harvest Contactor Ice Making Valve Valve Water Water Length Water Comp. Coil Condenser (Left) (Right) Inlet Dump Compressor Sequence of Pump (When Liquid Li n e Fan Motor of Time (When Valve Valve Used)
Page 78 Remote Air-Cooled Single Evaporator Model Energized Parts Chart (Continued) Harvest Harvest Contactor Ice Making Valve Valve Water Water Length Water Comp. Coil Condenser (Left) (Right) Inlet Dump Compressor Sequence of Pump (When Liquid Li n e Fan Motor of Time (When Valve Valve...
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Page 81 Troubleshooting Safety Limits In addition to standard safety controls, the control board has built in safety limit controls which protect the ice machine from major component failures. Use the following procedures to determine if the control board contains a safety limit indication. 1.
Page 82: Quad Evaporator Machines Only
QUAD EVAPORATOR MACHINES ONLY When a safety limit condition causes the ice machine to stop, 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. 1.
Page 83 Safety Limit Stand-By Mode: The first time a safety limit shut down occurs, (three consecutive long freeze or harvest cycles) the ice machine will turn off for 60 minutes (Stand-By Mode). During the Stand-By Mode the harvest light will be flashing continuously and a safety limit indication can be viewed.
Page 84: Ice Machine
ANALYZING WHY A SAFETY LIMIT STOPPED 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.
Page 85: Safety Limit #1
SAFETY LIMIT #1 Water System 1. Water supply to machine is being interrupted 2. Water leaking down the drain during freeze (dump valve or water tracking into condensate tray) 3. Water tracking into bin 4. Uneven water flow over evaporator 5.
Page 86: Safety Limit #2
SAFETY LIMIT #2 Water System 1. Ice thickness control probe is dirty causing a premature harvest with no ice on the plate. page 149 2. Dirty evaporator causing a long harvest and ice melt out. page 131 Electrical System 1. Ice thickness probe adjustment too close 2.
Page 87: Safety Limit #3
SAFETY LIMIT #3 Water System 1. Water supply to machine is being interrupted 2. Water leaking down the drain during freeze (dump valve or water tracking into condensate tray) 3. Water tracking into bin 4. Uneven water flow over evaporator 5.
Page 88: Control Board Testing
Control Board Testing All replacement S Model control boards and ice machines with serial numbers larger than 110924847 have a control board that includes a diagnostic test cycle. The control board can be identified by the blue printed circuit board and a push button switch on the bottom left corner labeled “service mode”.
Page 89: Troubleshooting By Symptom
Troubleshooting By Symptom The troubleshooting procedures follow flow charts. There are four symptoms, the symptom that you are experiencing will determine which flow chart to use. The flow chart asks yes and no questions to determine the problem. The flow chart will direct you to a procedure to correct the problem.
Page 90: Symptom #1 Ice Machine Will Not Run
SYMPTOM #1 ICE MACHINE WILL NOT RUN Ice Machine Stops Running or Has a History of Shutting Down Control board has energized lights? Does the Does ice machine run in CLEAN? ice machine start when toggle switch is moved to ICE? Refer to “Diagnosing an Ice Machine that Will Not Run”...
Page 91 Which light flashed immediately after Water Curtain/Ice Dampers resetting the toggle switch? in place? Install Water Curtain/ SL1/ Refer to Safety Limit #1 Ice Dampers Harvest (once) Long Freeze Cycle Replace the Water Curtain/ Water Curtain/Ice Damper Ice Dampers magnets attached? Refer to Safety Limit #2 SL2/ Long Harvest Cycle...
Page 92: Compressor Electrical Diagnostics
COMPRESSOR ELECTRICAL DIAGNOSTICS The compressor does not start or will trip repeatedly on overload. Check Resistance (Ohm) Values Compressor windings can have very low ohm NOTE: values. Use a properly calibrated meter. Perform the resistance test after the compressor cools. The compressor dome should be cool enough to touch (below 120°F/49°C) to assure that the overload is closed and the resistance readings will be accurate.
Page 93 CHECK MOTOR WINDINGS TO GROUND Check continuity between all three terminals and the compressor shell or copper refrigeration line. Scrape metal surface to get good contact. If continuity is present, the compressor windings are grounded and the compressor should be replaced. COMPRESSOR DRAWING LOCKED ROTOR To determine if the compressor is seized, check the amp draw while the compressor is trying to start.
Page 94: Freeze Cycle
SYMPTOM #2 LOW PRODUCTION, LONG FREEZE Ice Machine has a Long Freeze Cycle. Ice Formation is Thick Thin Ice Fill on Top or Bottom of Evaporator Low Production How to Use the Freeze Cycle Refrigeration System Operational Analysis Table GENERAL These tables must be used with charts, checklists and other references to eliminate refrigeration components not listed on the tables and external items and...
Page 95 PROCEDURE Step 1 Complete the “Operation Analysis” column. Read down the left “Operational Analysis” column. Perform all procedures and check all information listed. Each item in this column has supporting reference material to help analyze each step. While analyzing each item separately, you may find an “external problem”...
Page 96: Symptom #2 - Freeze Cycle Refrigeration System Operational Analysis Tables
SYMPTOM #2 - FREEZE CYCLE REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES S MODELS SINGLE EXPANSION VALVE Operational Analysis Air-Temperature Entering Condenser_____________ Ice Production Water Temperature Entering Ice Machine_________ Published 24 hour ice production________________ Calculated (actual) ice production_______________ NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is within 10% of charted capacity.
Page 97 S MODELS SINGLE EXPANSION VALVE Operational Analysis If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist Freeze Cycle page 115 to eliminate problems and/or components not listed on this table before proceeding. Suction Pressure Suction pressure is Suction pressure is...
Page 98 S MODELS SINGLE EXPANSION VALVE Operational Analysis Wait 5 minutes into the The harvest valve inlet is The harvest valve inlet The harvest valve inlet The harvest valve inlet is Cool enough to hold freeze cycle. is Cool enough to hold is Cool enough to hold -and- hand on...
Page 99 Freeze Cycle Refrigeration System Operational Analysis Tables S MODELS DUAL EXPANSION VALVE Operational Analysis Air-Temperature Entering Condenser_____________ Ice Production Water Temperature Entering Ice Machine_________ Published 24 hour ice production________________ Calculated (actual) ice production_______________ NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is within 10% of charted capacity.
Page 100 S MODELS DUAL EXPANSION VALVE Operational Analysis If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist Freeze Cycle page 115 to eliminate problems and/or components not listed on this table before proceeding. Suction Pressure Suction pressure is High Suction pressure is Low...
Page 101 S MODELS DUAL EXPANSION VALVE Operational Analysis Discharge Line Temperature Record freeze cycle discharge line temperature at Discharge line temp. Discharge line temp. Discharge line temp. Discharge line temp. the end of the freeze cycle 150°F (65°C) 150°F (65°C) less than 150°F (65°C) or higher or higher at the end of or higher at the end of...
Page 102 Freeze Cycle Refrigeration System Operational Analysis Tables S MODELS FOUR EXPANSION VALVES Operational Analysis Ambient Air-Temperature_____________ Ice Production Water Temperature Entering Ice Machine_________ Published 24 hour ice production________________ Calculated (actual) ice production_______________ NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is within 10% of charted capacity.
Page 103 S MODELS FOUR EXPANSION VALVES Operational Analysis Freeze Cycle Discharge Pressure If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist _____ ______ _____ page 112 and eliminate problems and/or components not listed on this table before proceeding. 1 minute Middle If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist...
Page 104 S MODELS FOUR EXPANSION VALVES Operational Analysis All harvest valve All harvest valve Harvest Valve Temperature One harvest valve All harvest valve inlets are Cool All harvest valve inlets are Cool Wait 5 minutes into the freeze inlet is Hot inlets are Cool enough to hold inlets are Cool...
Page 105: Freeze Cycle Refrigeration System Opera Tional Analysis Table Procedures
FREEZE CYCLE REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLE PROCEDURES The following is the procedures for completing each step of the Freeze Cycle Refrigeration System Operational Analysis Tables. Each procedure must be performed exactly for the table to work correctly. Before Beginning Service Ice machines may experience operational problems only during certain times of the day or night.
Page 106 Ice Production Check The amount of ice a machine produces directly relates to the operating water and air temperatures. This means a condensing unit with a 70°F (21°C) outdoor ambient temperature and 50°F (10°C) water produces more ice than the same model condensing unit with a 90°F (32°C) outdoor ambient temperature and 70°F (21°C) water.
Page 107 Weighing the ice is the only 100% accurate check. However, if the ice pattern is normal and the 1/8 in. thickness is maintained, the ice slab weights listed with the 24-Hour Ice Production Charts may be used. 4. Compare the results of step 3 with step 2. Ice production checks that are within 10% of the chart are considered normal.
Page 108 Installation/Visual Inspection Checklist Inadequate Clearances • Check all clearances on sides, back and top. Ice machine is not level • Level the ice machine Condenser is dirty • Clean the condenser Water filtration is plugged (if used) • Install a new water filter Water drains are not run separately and/or are not vented •...
Page 109 Water System Checklist A water-related problem often causes the same symptoms as a refrigeration system component malfunction. Water system problems must be identified and eliminated prior to replacing refrigeration components. Water area (evaporator) is dirty • Clean as needed Water inlet pressure not between 20 and 80 psig (1-5 Bar, 138-552 kPa).
Page 110 Ice Formation Pattern Evaporator ice formation pattern analysis is helpful in ice machine diagnostics. Analyzing the ice formation pattern alone cannot diagnose an ice machine malfunction. However, when this analysis is used along with Manitowoc’s Freeze Cycle Refrigeration System Operational Analysis Tables, it can help diagnose an ice machine malfunction.
Page 111 2. Extremely Thin at Evaporator Outlet There is no ice, or a considerable lack of ice formation, at the outlet of the evaporator. Examples: No ice at all on the outlet half of the evaporator, but ice forms on the inlet half of the evaporator.
Page 112 Analyzing Discharge Pressure in the Freeze Cycle 1. Determine the ice machine operating conditions: Air temp. entering condenser______ Air temp. around ice machine______ Water temp. entering sump trough______ 2. Refer to Operating Pressure table (starting on page 191) for ice machine being checked. Use the operating conditions determined in step 1 to find the published normal discharge pressures.
Page 113 FREEZE CYCLE DISCHARGE PRESSURE HIGH CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 108) Air Condenser • Dirty condenser filter • Dirty condenser fins • High inlet air temperature (Self contained 110°F/ 43°C max. Remote 120°F/49°C max.). • Condenser discharge air recirculation •...
Page 114 FREEZE CYCLE DISCHARGE PRESSURE LOW CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 108) Air Cooled Condensers • Defective head pressure control valve, won’t bypass (page 164) • Defective fan cycle control, stuck closed (page 167) Water Cooled Condensers •...
Page 115 Analyzing Suction Pressure The suction pressure gradually drops throughout the Freeze cycle. The actual suction pressure (and drop rate) changes as the air and water temperature entering the ice machine changes. These variables also determine the Freeze cycle times. To analyze and identify the proper suction pressure drop throughout the Freeze cycle, compare the published suction pressure to the published Freeze cycle time.
Page 116 Suction Pressure High Checklist Improper Installation • Refer to “Installation/Visual Inspection Checklist” page 108 Discharge Pressure • Discharge pressure is too high and is affecting low side – refer to “Freeze Cycle Discharge Pressure High Checklist” (page 113) Improper Refrigerant Charge •...
Page 117 SUCTION PRESSURE LOW CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 108) Discharge Pressure • Discharge pressure is too low and is affecting low side – refer to “Freeze Cycle Discharge Pressure High Checklist” (page 113) Improper Refrigerant Charge •...
Page 118 Single Expansion Valve Ice Machines Comparing Evaporator Inlet and Outlet Temperatures This procedure will not work on dual or Quad NOTE: expansion valve ice machines. The temperatures of the suction lines entering and leaving the evaporator alone cannot diagnose an ice machine.
Page 119 Multiple Expansion Valve Ice Machines Comparing Evaporator Inlet and Outlet Temperatures The temperatures of the suction lines entering and leaving the evaporator alone cannot diagnose an ice machine. However, comparing these temperatures during the freeze cycle, along with using Manitowoc’s Freeze Cycle Refrigeration System Operational Analysis Table, can help diagnose an ice machine malfunction.
Page 120 Harvest Valve Analysis Symptoms of a harvest valve remaining partially open during the freeze cycle can be similar to symptoms of either an expansion valve or compressor problem. The best way to diagnose a harvest valve is by using Manitowoc’s Ice Machine Freeze Cycle Refrigeration System Operational Analysis Table.
Page 121 Findings Comments The inlet of the harvest This is normal as the discharge valve is cool enough to line should always be too hot to touch and the touch and the harvest valve compressor discharge inlet, although too hot to touch line is hot.
Page 122 Discharge Line Temperature Analysis GENERAL Knowing if the discharge line temperature is increasing, decreasing or remaining constant can be an important diagnostic tool. Compressor discharge line temperature on a normally operating ice machine steadily increases throughout the freeze cycle. Ambient air temperatures affect the discharge line temperature.
Page 123 Water Regulating Valve Problem (Freeze Cycle) Valve not maintaining discharge pressure. • Valve incorrectly set, dirty or defective. Adjust valve to 240 psig, clean or replace valve. Discharge pressure extremely high; Liquid line entering receiver feels hot. • Water regulating valve incorrectly set or not opening.
Page 124 Final Analysis The column with the highest number of check marks identifies the refrigeration problem. COLUMN 1 - HARVEST VALVE LEAKING Replace the valve as required. COLUMN 2 - LOW CHARGE/TXV STARVING Normally, a starving expansion valve only affects the freeze cycle pressures, not the harvest cycle pressures.
Page 125 COLUMN 3 - TXV FLOODING A loose or improperly mounted expansion valve bulb causes the expansion valve to flood. Check bulb mounting, insulation, etc., before changing the valve. On dual expansion valve machines, change both valves. COLUMN 4 - COMPRESSOR Replace the compressor.
Page 126: Harvest Problems
Harvest Problems Melted Out Ice Cube Normal Ice Cube Definition of a harvest problem; At the end of a 3.5 minute harvest cycle the slab of ice is still contacting the evaporator. The slab of ice may or may not be removable by hand.
Page 127: Are Not Melted
SYMPTOM #3 ICE WILL NOT HARVEST, CUBES ARE NOT MELTED Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Not Melted After Harvest Discharge line temperature is normal Refer to Low production, at the end of the freeze cycle? Symptom #2 Normal fill pattern, long Freeze Cycle...
Page 128 Fan cycling Fan cycling Self Contained control operates correctly control opens below setpoint Air-cooled Condenser? in freeze cycle? in harvest cycle? Replace Fan Are you sure Discharge line Cycling Control temperature is normal? Repeat this flowchart & verify all data Self Contained Maintains correct Stops water flow 100%...
Page 129: Symptom #3 - Traditional Remotes Only
SYMPTOM #3 - TRADITIONAL REMOTES ONLY Traditional Remote Ice Machine - Long Harvest/Low Production/Intermittent Safety Limit 2 Fails at night or in low Normal ice fill, long harvest cycle, ambient - Operates possible SL #2, back of cubes are normally above 70F/21C not melted at the end of harvest cycle Liquid Line Wet condenser...
Page 130 Is head pressure high & Is harvest valve energized? suction pressure low in harvest? Replace Harvest Valve Refer to Sequence of Operation & Wiring Diagrams Is head pressure low & suction pressure low in harvest? Refer to Harvest Pressure Regulating Valve Diagnostics Refer to Symptom #4 - Will Not Harvest, Freeze...
Page 131: Melted
SYMPTOM #4 WILL NOT HARVEST, MELTED CUBES Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Melted After Harvest Are back of the cubes Is Ice Level Ice melted at end of Machine level? Machine harvest cycle? Refer to Is water flowing over the...
Page 132 Is the evaporator dirty? (Dry evaporator first then check) Discharge line temperature is normal at the end of the freeze cycle? S850/S1000 (A/W) = >140F/60C All other S Models = >150F/65C Refer to Symptom #2 Refer to Heavily Scaled Refer to Manual Freeze Cycle Operational Cleaning Procedure Cleaning Procedure...
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Page 134 This Page Intentionally Left Blank Part Number 80-1479-3 7/10...
Page 135: Electrical Components
Component Check Procedures Electrical Components MAIN FUSE FUNCTION The control board fuse stops ice machine operation if electrical components fail, causing high amp draw. SPECIFICATIONS The main fuse is 250 Volt, 7 amp. Warning High (line) vo ltage is a pplied to the con trol b oard (terminals #55 an d #56) at all times.
Page 136: Ice/Off/Clean Toggle Switch
ICE/OFF/CLEAN TOGGLE SWITCH FUNCTION The switch is used to place the ice machine in ICE, OFF or CLEAN mode of operation. SPECIFICATIONS Single-pole, double-throw switch. The switch is connected into a varying low D.C. voltage circuit. CHECK PROCEDURE Because of a wide variation in D.C. voltage, it NOTE: is not recommended that a voltmeter be used to check toggle switch operation.
Page 137: Bin Switch
BIN SWITCH FUNCTION Movement of the water curtain/ice dampers control bin switch operation. The bin switch has two main functions: 1. Terminating the Harvest cycle and returning the ice machine to the Freeze cycle. This occurs when the bin switch is opened and closed again within 30 seconds during the Harvest cycle.
Page 138 SYMPTOMS Bin Switch Fails Open • The ice machine will not start with the toggle switch in the ice position, but runs normally with the toggle switch in the clean position. Bin Switch Fails Closed • Safety limit 2 is recorded in the control board memory and the harvest cycle continues after the ice opens and closes the water curtain/ice dampers (harvest cycle is 3.5 minutes for single...
Page 139 Water Curtain/Ice Damper Removal Notes The water curtain must be on (bin switch closed) to start ice making. While a Freeze cycle is in progress, the water curtain can be removed and installed at any time without interfering with the electrical control sequence.
Page 140: Probe
CLEANING THE ICE THICKNESS OR WATER LEVEL PROBE Clean the probes using the following procedure. 1. Mix a solution of Manitowoc ice machine cleaner and water (2 ounces of cleaner to 16 ounces of water) in a container. 2. Soak probes in container of cleaner/water solution...
Page 141: Water Level Control Circuitry
WATER LEVEL CONTROL CIRCUITRY 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.
Page 142 Diagnosing Water Level Control Circuitry 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 and then back to ICE.(if water flows with the switch off, check the water inlet valve).
Page 143 WATER TROUGH OVERFILLING CONTINUED Step 3. Jumper Wire Connected from Control Board Terminal to Ground Is Water The Water Flowing Water Inlet Valve into the Cause Level Solenoid Water Light Is: Coil Is: Trough? The water level probe is causing the problem.
Page 144 PROBLEM: WATER WILL NOT RUN INTO THE SUMP TROUGH DURING THE FREEZE CYCLE Step 1 Verify water is supplied to the ice machine.Start a new Freeze sequence by moving the ICE/OFF/CLEAN toggle switch to OFF, then back to ICE. Wait until the freeze cycle starts Step 2 (approximately 45 seconds, the freeze cycle starts when the compressor energizes).
Page 145 Disconnect the water level probe from the Step 3 water level probe terminal on the control board. Important For the test to work properly you must wait until the Freeze cycle starts, prior to disconnecting the water level probe. If you restart the test, you must...
Page 146: Ice Thickness Probe (Harvest Initiation
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.
Page 147 MAXIMUM FREEZE TIME The control system includes a built-in safety which will automatically cycle the ice machine into harvest after 60 minutes in the freeze cycle. ICE THICKNESS CHECK The ice thickness probe is factory-set to maintain the ice bridge thickness at 1/8 in. (32 mm). Make sure the water curtain/splash shields NOTE: are in place when performing this check.
Page 148 Diagnosing Ice Thickness Control Circuitry PROBLEM: 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. Step 2 Wait until water starts to flow over the evaporator (freeze cycle).
Page 149 PROBLEM: 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. Step 2 Disconnect the ice thickness probe from the control board.
Page 150 HARVEST CYCLE CIRCUITRY The water level probe does not control the water inlet valve during the harvest cycle. During the harvest cycle water purge, the water inlet valve energizes and de-energizes strictly by time. The harvest water purge may be set at 45 seconds (top and center terminals) or 0 seconds (center and bottom terminals).
Page 151: Harvest Assist Air Pump
HARVEST ASSIST AIR PUMP FUNCTION The air pump breaks the vacuum between the sheet of ice and the evaporator which results in shorter harvest cycles. SPECIFICATIONS 115 Volt or 230 Volt - matches the ice machine voltage. CHECK PROCEDURE 1. Verify when the air pump should be running in the sequence of operation.
Page 152 Compressor Electrical Diagnostics The compressor does not start or will trip repeatedly on overload. Check Resistance (Ohm) Values Compressor windings can have very low ohm NOTE: values. Use a properly calibrated meter. Perform the resistance test after the compressor cools. The compressor dome should be cool enough to touch (below 120°F/49°C) to assure that the overload is closed and the resistance readings will be accurate.
Page 153 CHECK MOTOR WINDINGS TO GROUND Check continuity between all three terminals and the compressor shell or copper refrigeration line. Scrape metal surface to get good contact. If continuity is present, the compressor windings are grounded and the compressor should be replaced. COMPRESSOR DRAWING LOCKED ROTOR To determine if the compressor is seized, check the amp draw while the compressor is trying to start.
Page 154: Diagnosing Start Components
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.
Page 155 Relay The relay has a set of contacts that connect and disconnect the start capacitor from the compressor start winding. The contacts on the relay are normally closed (start capacitor in series with the start winding). The relay senses the voltage generated by the start winding and opens the contacts as the compressor motor starts.
Page 156 PTCR The PTCR allows current to flow through the start winding at compressor startup. Current flow heats the ceramic discs in the PTCR. The electrical resistance increases with temperature and stops all except a trickle of current flow through the start winding. The small flow of current keeps the PTCR hot (260°F/ 127°C) and the start winding out of the circuit.
Page 157 PTCR Operation Check 1. Visually inspect the PTCR. Check for signs of physical damage. The PTCR case temperature may reach NOTE: 210°F (100°C) while the compressor is running. This is normal. Do not change a PTCR just because it is hot. 2.
Page 158: Refrigeration Components
Refrigeration Components HIGH PRESSURE CUTOUT (HPCO) CONTROL FUNCTION Stops the ice machine if subjected to excessive high- side pressure. The HPCO control is normally closed, and opens on a rise in discharge pressure. Specifications Cut-Out Cut-In 450 psig ±10 Automatic Reset (3103 kPa ±69 31 bar ±.69) (Must be below 300 psig (2068 kPa 20.68 bar) to reset.) CHECK PROCEDURE...
Page 159: Fan Cycle Control
The fan cycle control closes on an increase, and opens on a decrease in discharge pressure. Specifications Model Cut-In (Close) Cut-Out (Open) S300 / S320 250 ±5 200 ±5 S420 / S450 (1723 kPa ±.34) (1517 kPa ±.34) S500 / S600 (17.23 bar ±.34)
Page 160: Water Regulating Valve
WATER REGULATING VALVE Self-Contained Water-Cooled Models Only FUNCTION The water regulating valve maintains the freeze cycle discharge pressure. The valve setting for the S3300W-HP is 240 psig. CHECK PROCEDURE 1. Determine if the head pressure is high or low (refer to Operational Pressure Chart page 191). 2.
Page 161: Remotes Only
HARVEST PRESSURE REGULATING (HPR) SYSTEM REMOTES ONLY GENERAL The harvest pressure regulating (H.P.R.) system includes: • Harvest pressure regulating solenoid valve (H.P.R. solenoid). This is an electrically operated valve which opens when energized, and closes when de-energized. INLET OUTLET FLOW HPR SOLENOID •...
Page 162 FREEZE CYCLE The H.P.R. system is not used during the freeze cycle. The H.P.R. solenoid is closed (de-energized), preventing refrigerant flow into the H.P.R. valve. HARVEST CYCLE During the harvest cycle, the check valve in the discharge line prevents refrigerant in the remote condenser and receiver from backfeeding into the evaporator and condensing to liquid.
Page 163 3. Freeze time normal? (Refer to Cycle Times/Refrigerant Pressures/24 Hour Ice Production Charts page 191) Shorter freeze cycles - Refer to head pressure control valve diagnostics page 164. Longer freeze cycles - Refer to water system checklist page 109, then refer to Refrigeration Diagnostic Procedures .
Page 164: Head Pressure Control Valve
HEAD PRESSURE CONTROL VALVE Manitowoc remote systems require head pressure control valves with special settings. Replace defective head pressure control valves only with “original” Manitowoc replacement parts. OPERATION The R404A head pressure control valve is non adjustable. At ambient temperatures of approximately 70°F (21°C) or above, refrigerant flows through the valve from the condenser to the receiver inlet.
Page 165 5. Using the information gathered, refer to the chart below. A head pressure control valve that will not NOTE: bypass, will function properly with condenser air temperatures of approximately 70°F (21°C) or above. When the temperature drops below 70°F (21°C), the head pressure control valve fails to bypass and the ice machine malfunctions.
Page 166 FAN CYCLE CONTROL VS. HEAD PRESSURE CONTROL VALVE A fan cycle control cannot be used in place of a head pressure control valve. The fan cycle control is not capable of bypassing the condenser coil and keeping the liquid line temperature and pressure up. This is very apparent when it rains or the outside temperature drops.
Page 167: Low Pressure Cutout (Lpco) Control
LOW PRESSURE CUTOUT (LPCO) CONTROL (S3300 Only) FUNCTION Signals the control board to energize and de-energize the ice machine when suction pressure rises above or falls below setpoint. The LPCO control is closed at pressures above setpoint and opens at pressures below setpoint.. Specifications Cut-Out Cut-In...
Page 168: Harvest Pressure Solenoid Valve
HARVEST PRESSURE SOLENOID VALVE (S3300 Only) FUNCTION Transfers refrigerant from the high side to the low side during the harvest cycle. CHECK PROCEDURE 1. Reset the ice machine with the toggle switch to over ride the 6 minute freeze lock. 2.
Page 169: Refrigerant Recovery/Evacuation
Refrigerant Recovery/Evacuation NORMAL SELF-CONTAINED MODEL PROCEDURES Do not purge refrigerant to the atmosphere. Capture refrigerant using recovery equipment. Follow the manufacturer’s recommendations. Important Manitowoc assumes no responsibility for the use o f contaminated refrigerant. Damage resulting from the use of cont aminated refri gerant i s the so le responsibility of the servicing company.
Page 170 Self-Contained Recovery/Evacuation 1. Place the toggle switch in the OFF position. 2. Install manifold gauges, scale and recovery unit or two-stage vacuum pump. MANIFOLD SET OPEN OPEN BACKSEATED BACKSEATED LOW SIDE HIGH SIDE SERVICE SERVICE VALVE VALVE VACUUM PUMP/ RECOVERY UNIT OPEN CLOSED RECOVERY/EVACUATION...
Page 171 Self-Contained Charging Procedures Important The ch arge is critical on all Mani towoc ice machines. Use a scale to ensure the prop er charge is installed. 1. Be sure the toggle switch is in the OFF position. MANIFOLD SET CLOSED OPEN FRONTSEATED BACKSEATED...
Page 172 2. Close the vacuum pump valve, the low side service valve, and the low side manifold gauge valve. 3. Open the high side manifold gauge valve, and backseat the high side service valve. 4. Open the charging cylinder and add the proper refrigerant charge (shown on nameplate) through the discharge service valve.
Page 173: Normal Remote Model Procedures
Refrigerant Recovery/Evacuation Do not purge refrigerant to the atmosphere. Capture refrigerant using recovery equipment. Follow the manufacturer’s recommendations. Important Manitowoc Ice, Inc. assumes no re sponsibility for the use of contaminated refrigera nt. Damag e resulting from the use o f...
Page 174 Manitowoc recommends using an access NOTE: valve core removal and installation tool on the discharge line quick-connect fitting. This permits access valve core removal. This allows for faster evacuation and charging, without removing the manifold gauge hose. REMOTE RECOVERY/EVACUATION 1. Place the toggle switch in the OFF position. 2.
Page 175 REMOTE RECOVERY/EVACUATION CONNECTIONS Part Number 80-1479-3 7/10...
Page 176 Remote Charging Procedures 1. Be sure the toggle switch is in the OFF position. 2. Close the vacuum pump valve, the low and high side service valves (frontseat), and the low side manifold gauge valve. 3. Open the refrigerant cylinder and add the proper refrigerant charge (shown on nameplate) into the system high side (receiver outlet valve and discharge lines quick-connect fitting).
Page 177 EVAPORATOR HEAT EXCHANGER EXPANSION VALVE SOLENOID VALVES LOW SIDE SERVICE VALVE (BACKSEATED) STRAINER COMPRESSOR HARVEST PRESSURE HARVEST CHECK SOLENOID PRESSURE VALVE VALVE REGULATING VALVE HIGH SIDE LIQUID SERVICE VALVE LINE (BACKSEATED) SOLENOID DISCHARGE LINE DRIER QUICK CONNECT SCHRAEDER FITTING REMOTE CONDENSER RECEIVER SERVICE VALVE 1/2 OPEN...
Page 178: System Contamination Clean-Up
This section describes the basic requirements for restoring contaminated systems to reliable service. Important Manitowoc Ice, Inc . assume s no responsibility for the use of cont aminated refrigera nt. Da mage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company.
Page 179 Contamination Cleanup Chart Required Cleanup Symptoms/Findings Procedure No symptoms or suspicion of Normal contamination evacuation/recharging procedure Moisture/Air Contamination symptoms Refrigeration system open to atmosphere for longer than Mild contamination 15 minutes cleanup procedure Refrigeration test kit and/or acid oil test shows contamination Leak in water cooled condenser...
Page 180: Cleanup Procedure
CLEANUP PROCEDURE Mild System Contamination 1. Replace any failed components. 2. If the compressor is good, change the oil. 3. Replace the liquid line drier. If the contamination is from moisture, use NOTE: heat lamps during evacuation. Position them at the compressor, condenser and evaporator prior to evacuation.
Page 181 Severe System Contamination 1. Remove the refrigerant charge. 2. Remove the compressor. 3. Disassemble the harvest solenoid valve. If burnout deposits are found inside the valve, install a new harvest valve, replace the manifold strainer, TXV and harvest pressure regulating valve.
Page 182 Important Dry n itrogen i s re commended fo r this p rocedure. This will prevent CFC release. 10. Follow the normal evacuation procedure, except replace the evacuation step with the following: A. Pull vacuum to 1000 microns. Break the vacuum with dry nitrogen and sweep the system.
Page 183: Moving Refrigerant Charge
REPLACING PRESSURE CONTROLS WITHOUT REMOVING REFRIGERANT CHARGE 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. • Fan cycle control (air cooled only) • Water regulating valve (water cooled only) •...
Page 184 SV1406 USING PINCH-OFF TOOL Part Number 80-1479-3 7/10...
Page 185: Main Fuse
MAIN FUSE The main fuse is 250 Volt, 7 amp. FAN CYCLE CONTROL (Self-Contained Air-Cooled Models Only) Model Cut-In (Close) Cut-Out (Open) S300 / S320 250 ±5 200 ±5 S420 / S450 (1723 kPa ±.34) (1517 kPa ±.34) S500 / S600 (17.23 bar ±.34)
Page 186: Filter-Driers
FILTER-DRIERS The filter-driers used on Manitowoc ice machines are manufactured to Manitowoc specifications. The difference between a Manitowoc drier and an off- the-shelf drier is in filtration. A Manitowoc drier has dirt-retaining filtration, with fiberglass filters on both the inlet and outlet ends. This is very important because ice machines have a back-flushing action that takes place during every Harvest cycle.
Page 187: Total System Refrigerant Charge
NOTE: All machines listed use R-404A refrigerant. Additional Maximum Model Air Cooled Water Cooled Remote Refrigerant for Line System Charge Sets 51’-100’ S300 18 oz. 11 oz. S320 20 oz. 15 oz. S420/S450 21 oz. 14 oz. S500 Before 110684316 24 oz.
Page 188 Additional Maximum Model Air Cooled Water Cooled Remote Refrigerant for Line System Charge Sets 51’-100’ S1000 Before 110697023 36 oz. 26 oz. 8.5 lb. 2 lb. 10.5 lb. S1000 After 110697023 34 oz. 28 oz. 8.5 lb. 2 lb. 10.5 lb. S1200 42 oz.
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Page 190 This Page Intentionally Left Blank Part Number 80-1479-3 7/10...
Page 191: Refrigerant Pressure Charts
Charts Cycle Times/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 “Symptom #2 - Operational Analysis Table” page 92 for the list of data that must be collected for refrigeration diagnostics.
Page 192: S300 Series
S300 SERIES S300A All Self-Contained Air-cooled Models Before Serial Number 110704351 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C...
Page 193: Operating Pressures
S300A All Self-Contained Air-cooled Models After Serial Number 110704351 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 8.7-10.4...
Page 194 S300W All Self-Contained Water-cooled Models Before Serial Number 110704351 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Around Freeze Time Ice Machine Harvest Water Temperature °F/°C °F/°C Time 50/10 70/21 90/32...
Page 195 S300W All Self-Contained Water-cooled Models After Serial Number 110704351 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 9.1-10.9...
Page 196: S320 Series
S320 SERIES S300A All Self-Contained Air-Cooled Models Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 70/21 12.3-14.0 13.1-14.9...
Page 197 S320 Series All Self-Contained Water-Cooled Models Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Around Ice Harvest Water Temperature °F/°C Machine Time 50/10 70/21 90/32 °F/°C 12.7-14.4 13.6-15.5 15.2-17.3...
Page 198: S420 Series
S420 SERIES S420A All Self-Contained Air-cooled Models Before Serial Number110667970 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 199 S420A All Self-Contained Air-cooled Models After Serial Number 110667970 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 9.4-10.0...
Page 200 S420W All Self-Contained Water-cooled Models Before Serial Number 110667970 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Harvest Water Temperature °F/°C Machine Time °F/°C 50/10 70/21 90/32...
Page 201 S420W All Self-Contained Water-cooled Models After Serial Number 110667970 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 8.9-9.5...
Page 202: S450 Series
S450 SERIES S450A All Self-Contained Air-cooled Models Before Serial Number 110670157 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21...
Page 203 S450A All Self-Contained Air-cooled Models After Serial Number 110670157 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 9.4-10.0...
Page 204 S450W All Self-Contained Water-cooled Models Before Serial Number 110670157 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Around Ice Harvest Water Temperature °F/°C Machine Time °F/°C 50/10 70/21 90/32...
Page 205 S450W All Self-Contained Water-cooled Models After Serial Number 110670157 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 8.9-9.5...
Page 206: S500 Series
S500 SERIES S500A All Self-Contained Air-cooled Models Before Serial Number 110684316 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21...
Page 207 SD0502A Dice Cube, Self-Contained Air-cooled After Serial Number Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 35/2 to 10.4-12.1...
Page 208 SY0504A Half Dice Cube, Self-Contained Air-cooled After Serial Number 110684316 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 209 S500W All Self-Contained Water-cooled Models Before Serial Number 110684316 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Water Temperature °F/°C Around Ice Time Machine °F/°C 50/10 70/21 90/32...
Page 210 SD0503W Dice Cube, Self-Contained Water-cooled Models After Serial Number 110684316 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32...
Page 211 SY0505W Half Dice Cube, Self-Contained Water-cooled After Serial Number 110684316 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32...
Page 212 S500N All Remote Air-cooled Condenser Models Before Serial Number 110684316 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 213 SD0592N Dice Cube, Remote Air-cooled Condenser Models After Serial Number 110684316 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21...
Page 214 SY0594N Half Dice Cube, Remote Air-cooled Condenser Models After Serial Number 110684316 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10...
Page 215: S600 Series
S600 SERIES S600A All Self-Contained Air-Cooled Models Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Harvest Entering Time Water Temperature °F/°C Condenser °F/°C 50/10.0 70/21.1 90/32.2 7.6-9.0 8.4-9.9 9.1-10.7...
Page 216 S600W All Self-Contained Water-Cooled Models Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Around Ice Harvest Water Temperature °F/°C Machine °F/°C Time 50/10 70/21 90/32 7.6-9.0 7.9-9.4 8.6-10.1 70/21...
Page 217 S600N All Remote Air-Cooled Condenser Models Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 7.9-9.4 8.8-10.3 9.3-10.9 -20/-29 to 70/21...
Page 218: S850 Series
S850 SERIES S850A All Self-Contained Air-Cooled Models Before Serial Number 110683282 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21...
Page 219 SD0852A Dice Cube, Self-Contained Air-Cooled Models After Serial Number 110683282 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 220 SY0854A Half Dice Cube, Self-Contained Air-Cooled Models After Serial Number 110683282 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21...
Page 221 S850W All Self-Contained Water-Cooled Models Before Serial Number 110683282 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Around Ice Harvest Water Temperature °F/°C Machine °F/°C Time 50/10 70/21 90/32...
Page 222 SD0853W Dice Cube, Self-Contained Water-Cooled Models After Serial Number 110683282 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Around Ice Harvest Water Temperature °F/°C Machine °F/°C Time 50/10 70/21...
Page 223 SY0855W Half Dice Cube, Self-Contained Water-Cooled Models After Serial Number 110683282 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Around Ice Harvest Water Temperature °F/°C Machine °F/°C Time 50/10 70/21...
Page 224 S850N Remote Air-cooled Condenser All Remote Condenser Air-Cooled Before Serial Number 110682385 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10...
Page 225 SD0892N Dice Cube, Remote Condenser Air-Cooled After Serial Number 110682385 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 226 SY0894N Half Dice Cube, Remote Condenser Air-Cooled After Serial Number 110682385 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21...
Page 227: S1000 Series
S1000 SERIES S1000A All Self-Contained Air-cooled Before Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 228 SD1002A Dice Cube, Self-Contained Air-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 6.4-7.4...
Page 229 SY1004A Half Dice Cube, Self-Contained Air-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 230 S1000W All Self-Contained Water-cooled Before Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Around Ice Harvest Water Temperature °F/°C Machine °F/°C Time 50/10 70/21 90/32 6.8-7.9...
Page 231 SD1003W Dice Cube, Self-Contained Water-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32...
Page 232 SY1005W Half Dice Cube, Self-Contained Water-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32...
Page 233 S1000N All Remote Condenser Air-cooled Before Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 7.1-8.3...
Page 234 SD1092N Dice Cube, Remote Condenser Air-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 235 SY1094N Half Dice Cube, Remote Condenser Air-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21...
Page 236: S1200 Series
S1200 SERIES S1200A All Self-Contained Air-cooled Before Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 237 SD1202A Dice Cube, Self-Contained Air-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 8.3-9.3...
Page 238 SY1204A Half Dice Cube, Self-Contained Air-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32...
Page 239 S1200W All Self-Contained Water-cooled Before Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32 7.1-7.9...
Page 240 SD1203W Dice Cube, Self-Contained Water-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32...
Page 241 SY1205W Half Dice Cube, Self-Contained Water-cooled After Serial Number 110697023 Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32...
Page 242: S1400 Series
S1400 SERIES S1400 Self-contained air-cooled All Self-Contained Air-cooled with a Manufacture Date Before 0905 (May 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time...
Page 243 SD1402A Dice Cube, Self-Contained Air-Cooled With a Manufacture Date of 0905 (May 2009) or Later Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C...
Page 244 SY1404A Half Dice Cube, Self-Contained Air-Cooled With a Manufacture Date of 0905 (May 2009) or Later Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time...
Page 245 S1400 Self-contained Water-cooled All Self-Contained Water-cooled with a Manufacture Date Before 0711 (November 2007) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10...
Page 246 SD1403W Dice Cube, Self-Contained Water-Cooled With a Manufacture Date From 0711 to 0905 (November 2007 to May 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C...
Page 247 SY1405W Half Dice Cube, Self-Contained Water-Cooled With a Manufacture Date From 0711 to 0905 (November 2007 to May 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES - Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp.
Page 248 SD1403W Dice Cube, Self-Contained Water-Cooled With a Manufacture Date of 0905 (May 2009) or Later Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C...
Page 249 SY1405W Half Dice Cube, Self-Contained Water-Cooled With a Manufacture Date of 0905 (May 2009) or Later Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C...
Page 250 S1400 Remote Air-cooled Condenser All Remote Condenser Air-cooled with a Manufacture Date Before 0905 (May 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time...
Page 251 SD1492N Dice Cube, Remote Condenser Air-Cooled With a Manufacture Date of 0905 (May 2009) or Later Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time...
Page 252 SY1494N Half Dice Cube, Remote Condenser Air-Cooled With a Manufacture Date of 0905 (May 2009) or Later Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser...
Page 253: S1600 Series
S1600 SERIES S1600A All Self-Contained Air-cooled Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 9.6-10.5 10.7-11.7 11.1-12.2 70/21...
Page 254 S1600W All Self-Contained Water-cooled Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32 9.8-10.8 10.9-12.0 12.4-13.6 70/21 10.1-11.1...
Page 255 S1600N All Remote Air-cooled Condenser Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C 50/10 70/21 90/32 10.4-11.5 11.2-12.3 12.4-13.6 -20/-29 to 70/21 10.5-11.5...
Page 256: S1800 Series
S1800 SERIES S1800 Self-contained air-cooled All Self-Contained Air-cooled with a Manufacture Date Before 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time...
Page 257 SD1802A Dice Cube, Self-Contained Air-cooled with a Manufacture Date After 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C...
Page 258 SY1804A Half Dice Cube, Self-Contained Air-cooled with a Manufacture Date After 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C...
Page 259 S1800 Self-Contained Water-Cooled All Self-Contained Water-cooled with a Manufacture Date Before 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10...
Page 260 SD1803W Dice Cube, Self-Contained Water-cooled with a Manufacture Date After 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C...
Page 261 SY1805W Half Dice Cube, Self-Contained Water-cooled with a Manufacture Date After 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C...
Page 262 S1800 Remote Air-cooled Condenser All Remote Condenser Air-cooled with a Manufacture Date Before 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time...
Page 263 SD1892N Dice Cube, Remote Condenser Air-cooled with a Manufacture Date After 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C...
Page 264 SY1894N Half Dice Cube, Remote Condenser Air-cooled with a Manufacture Date After 0910 (October 2009) Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Harvest Water Temperature °F/°C Condenser Time °F/°C...
Page 265: S3300 Series
S3300 SERIES SD3303W Self-Contained Water-Cooled All Dice Cube, Self-Contained Water-cooled Ice Machines Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10...
Page 266 SY3305W All Half Dice Cube, Self-Contained Water-cooled Ice Machines Characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Harvest Around Ice Water Temperature °F/°C Time Machine °F/°C 50/10 70/21 90/32...
Page 267: Wiring Diagrams
Diagrams Wiring Diagrams The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the ice machine you are servicing. Warning Always discon nect power before worki ng on electrical circuitry. Some components are wired differently on energy efficient machines.
Page 268: Energystar Machines
WIRING DIAGRAMS BEFORE ENERGY EFFICIENT & ENERGYSTAR MACHINES S320 Self Contained - 1 Phase SEE SERIAL PLATE FOR VOLTAGE L2 OR N (20) (21) GROUND (22) WATER (61) VALVE CONTROL BOARD (99) (55) (77) (89) (60) (80) HARVEST SOLENOID HIGH PRESSURE CUTOUT (75) (76)
Page 269 S300/S420/S450/ S500 (after serial number 110074051) - Self Contained - 1 Phase Water Valve L2 or N (20) (21) (61) Ground (22) Control Board Harvest Valve (89) (55) (80) (60) (77) High Pressure Dump Valve (75) Cutout (88) (81) (76)
Page 270 S500 (before serial number 110074051) S600/S850/S1000/S1200- Self Contained- 1 Phase L2 or N Ground Water Valve (20) (21) (89) (55) (22) (61) Control Board Harvest Valve High Pressure Cutout (60) (80) (77) (88) Dump Valve (75) (81) (76) (57) (98) (99) Trans.
Page 271 S850/S1000/S1200 - Self Contained - 3 Phase Water Valve Ground (20) (21) (61) (55) (89) Harvest Valve Control Board (77) High Pressure (60) (80) Cutout Dump Valve (88) (75) (76) (81) (57) (98) (99) Trans. Water Pump Fuse (7a) (42) (58) Terminates at (59)
Page 272 S500 Danfoss Compressor (after serial number 110074051) - Remote - 1 Phase SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WATER WORKING ON ELECTRICAL (21) (22) VALVE (20) CIRCUITRY. L2 OR N (82) SOLENOID (78) (89) (55) (79) (61) HIGH PRESSURE CONTROL BOARD (77)
Page 273 S500 (before serial number 110074051)/ S600/S850/S1000/S1200 - Remote - 1 Phase Water Valve L2 or (21) (20) (22) Ground HPR Valve (78) (89) (55) (79) (61) Harvest Valve Control Board (77) High Pressure (80) Cutout (60) (88) Dump Valve (76) (81) (57) (98)
Page 274 S850/S1000/S1200 - Remote - 3 Phase Water Valve (20) (21) (22) Ground HPR Valve (79) (89) (55) (78) (61) Harvest Valve Control Board High Pressure (80) (77) (88) Cutout (60) Dump Valve (76) (81) Water Pump (57) (99) (98) (82) Trans.
Page 275 S1400/S1600/S1800 - Self-Contained - 1 Phase WATER VALVE L2 OR N (21) (20) (22) LH HARVEST (89) (55) SOLENOID (61) (77) (87) CONTROL BOARD (88) HIGH PRESSURE CUTOUT (99) RH HARVEST (80) (60) (88) SOLENOID (76) (81) DUMP SOLENOID (57) (98) WATER TRANS.
Page 276 S1400/S1600/S1800 - Self-Contained - 3 Phase WATER VALVE (21) (20) (22) LH HARVEST SOLENOID (77) (61) (87) (55) (89) (99) (88) CONTROL BOARD HIGH PRESSURE RH HARVEST (80) (60) CUTOUT SOLENOID (88) (76) (81) DUMP SOLENOID (57) (98) WATER TRANS. PUMP FUSE (7A) (58)
Page 277 S1400/S1600/S1800 - Remote - 1 Phase WATER VALVE (21) (22) (20) L2 OR N (82) SOLENOID (55) (89) (78) (79) RH HARVEST HIGH PRESSURE SOLENOID (61) CUTOUT (87) CONTROL BOARD (88) (77) (88) (60) (80) LH HARVEST SOLENOID (76) (81) DUMP SOLENOID (57)
Page 278 S1400/S1600/S1800 - Remote - 3 Phase WATER VALVE (21) (22) (20) (82) SOLENOID (79) (78) (89) (55) RH HARVEST SOLENOID (87) (88) HIGH PRESSURE CUTOUT (61) (88) CONTROL BOARD (77) (80) LH HARVEST SOLENOID (60) (76) DUMP (81) SOLENOID (99) (98) (57) WATER...
Page 279: Ergystar Machines
START CAPACITOR (48) (44) COMPRESSOR (46) TERMINAL LAYOUT VIEWED FROM END OF COMPRESSOR (45) COMPRESSOR (49) (50) CAPACITOR WIRING FOR S300 ONLY (47) OVERLOAD INTERNAL (NO RUN CAPACITOR) (230V 50/60 HZ) (53) (42) (48) START (44) (46) (49) CAPACITOR POTENTIAL...
Page 280 S600/S850/S1000/S1200 Self-Contained - 1 Phase L2 OR N WATER VALVE SEE SERIAL PLATE FOR VOLTAGE (21) (20) Caution: Disconnect Power Before Working on Electrical Circuitry (22) AIR PUMP (89) (55) WHEN USED (61) (28) (27) CONTROL BOARD HIGH PRESSURE CUTOUT (60) HARVEST (80)
Page 281 S850/S1000/S1200 Self-Contained - 3 Phase WATER VALVE (21) (22) SEE SERIAL PLATE FOR VOLTAGE (20) Caution: Disconnect Power Before Working on Electrical Circuitry (28) (61) AIR PUMP (89) (55) WHEN USED CONTROL BOARD (27) (77) HIGH PRESSURE (80) (60) HARVEST CUTOUT SOLENOID (88)
Page 282 S1400/S1800 Self-Contained - 1 Phase L2 OR N WATER VALVE (20) (21) (22) LH HARVEST (89) SOLENOID (55) (61) (77) (87) CONTROL BOARD HIGH PRESSURE (25) (26) CUTOUT (99) (88) (60) (88) PUMP RH HARVEST (80) (57) SOLENOID (76) TRANS. DUMP (81) SOLENOID...
Page 283 S1400/S1800 Self-Contained - 3 Phase WATER (20) VALVE (21) (22) LH HARVEST SOLENOID (61) (77) (55) (87) (89) (99) CONTROL BOARD (26) (25) (88) HIGH PRESSURE (60) CUTOUT PUMP (88) RH HARVEST (80) (57) SOLENOID (76) TRANS. (81) DUMP SOLENOID FUSE (7A) (98) WATER...
Page 284 S3300 Water-Cooled - 3 phase Part Number 80-1479-3 7/10...
Page 285 S500 Remote - 1 Phase WATER VALVE (21) (22) (20) L2 OR N (82) AIR PUMP SEE SERIAL PLATE FOR VOLTAGE WHEN USED (28) Caution: Disconnect Power Before Working on Electrical Circuitry (27) SOLENOID (89) (78) (79) (61) CONTROL BOARD HIGH PRESSURE (77) CUTOUT...
Page 286 S600/S850/S1000/S1200 Remote - 1 Phase L2 OR N WATER VALVE SEE SERIAL PLATE FOR VOLTAGE (21) (22) (20) Caution: Disconnect Power Before Working on Electrical Circuitry AIR PUMP (28) WHEN USED (89) (55) (27) (61) CONTROL BOARD SOLENOID HIGH PRESSURE (82) CUTOUT (78)
Page 287 S850/S1000/S1200 Remote - 3 Phase WATER VALVE (20) (21) (22) SEE SERIAL PLATE FOR VOLTAGE Caution: Disconnect Power Before Working on Electrical Circuitry AIR PUMP WHEN USED (28) (89) (55) (27) (61) CONTROL BOARD (82) HIGH PRESSURE SOLENOID CUTOUT (78) (60) (88) (79)
Page 288 S1400/S1800 Remote - 1 Phase WATER VALVE (22) (21) (20) L2 OR N SOLENOID (82) (78) (55) (79) (89) RH HARVEST HIGH PRESSURE SOLENOID (61) CUTOUT (87) (88) CONTROL BOARD (77) (88) (60) LH HARVEST (80) SOLENOID (26) (25) PUMP (57) (76) (81)
Page 289 S1400/S1800 Remote - 3 Phase WATER VALVE (21) (22) (20) (82) SOLENOID (79) (78) (89) (55) RH HARVEST SOLENOID (88) (87) HIGH PRESSURE CUTOUT (61) (88) (77) CONTROL BOARD (80) LH HARVEST SOLENOID (60) (26) (25) PUMP (57) (76) DUMP (81) SOLENOID TRANS.
Page 290: Electronic Control Board
Electronic Control Board Single and Twin Evaporator Without Test Button N 115V L2 208-230V PRIMARY POWER SUPPLY AC LINE VOLTAGE (56) ELECTRICAL PLUG (55) AIR PUMP (NOT USED ON MAIN FUSE ALL MODELS) (7A) CLEAN LIGHT (YELLOW) WATER PURGE ADJUSTMENT LEFT BIN LIGHT (GREEN) RIGHT BIN LIGHT (GREEN) REMOTE BIN LIGHT (NOT USED)
Page 291 Single and Twin Evaporator With Test Button N 115V L2 208-230V PRIMARY POWER SUPPLY AC LINE VOLTAGE (56) ELECTRICAL PLUG (55) AIR COMPRESSOR (NOT USED ON MAIN FUSE ALL MODELS) (7A) CLEAN LIGHT (YELLOW) WATER PURGE ADJUSTMENT LEFT BIN LIGHT (GREEN) RIGHT BIN LIGHT (GREEN) REMOTE BIN LIGHT (GREEN) WATER PROBE LIGHT (GREEN)
Page 292: Quad Evaporator Ice Machines
Quad Evaporator Ice Machines AC LINE VOLTAGE PLUG FUSE 7A HARVEST VALVES CLEAN (YELLOW) HARVEST (RED) WATER LEVEL (GREEN) WATER SOLENOID (RED) LIQUID SOLENOID (RED) DUMP VALVE (RED) ICE PROBE WATER PUMP (RED) CURTAIN SWITCH 4 (GREEN) WATER LEVEL PROBE HARVEST VALVE 4 (RED) CURTAIN SWITCH 3 (GREEN) HARVEST VALVE 3 (RED)
Page 293: Refrigeration Tubing Schematics
Refrigeration Tubing Schematics SELF-CONTAINED AIR- OR WATER -COOLED MODELS S300/S320/S420/S450/S500/S600/S850/S1000/S1200 E VA P O R AT O R H E AT E X C H A N G E R EXPANSION VALVE H O T G A S S O L E N O I D VA LV E...
Page 294 S3300 Part Number 80-1479-3 7/10...
Page 295: Remote Models
REMOTE MODELS S500/S600/S850/S1000 EVAPORATOR HEAT EXCHANGER EXPANSION VALVE STRAINER COMPRESSOR HOT GAS SOLENOID VALVE CHECK VALVE REMOTE CONDENSER LIQUID LINE SOLENOID VALVE HARVEST PRESSURE HEAD REGULATING VALVE PRESSURE CONTROL VALVE DRIER H.P.R. SOLENOID VALVE CHECK VALVE RECEIVER SERVICE VALVE RECEIVER HIGH PRESSURE VAPOR HIGH PRESSURE LIQUID LOW PRESSURE LIQUID...
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Page 300 Manitowoc Ice 2110 South 26th Street, P.O. Box 1720 Manitowoc, WI 54221-1720, USA Ph: 920-682-0161 Fax: 920-683-7589 Visit us online at: www.manitowocice.com © 2010 Manitowoc Part Number 80-1479-3 7/10...

This manual is also suitable for:

S420 S1000 S1200 S1400w S1400a S1400n ... Show all

Manitowoc S300 Technician's Handbook

General Information

Model Numbers

Ice Cube Sizes

Model/Serial Number Location

Energy Efficient Ice Machine Serial Breaks

Ice Machine Warranty Information

Procedure to Clean Heavily Scaled

Ice Machine Heat of Rejection

Removal from Service/Winterization

Sequence of Operation

Self Contained Air or Water Cooled

Safety Timers

Safety Limits

Troubleshooting

Safety Limits

Harvest Problems

Component Check Procedures

Electrical Components

Compressor Electrical Diagnostics

Refrigeration Components

Cycle Times/24-Hour Ice Production/Refrigerant Pressure Charts

Wiring Diagrams

Quick Links

Troubleshooting

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Summary of Contents for Manitowoc S300

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Table of Contents