Manitowoc I0320 Technician's Handbook
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Manitowoc I0320 Technician's Handbook

Indigo series ice machines with r290 refrigerant
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See also: Installation, Operation & Maintenance Manual
Manitowoc
Indigo™ Series
Ice Machines With R290
Refrigerant
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 STH038 5/12

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  • Page 1 Manitowoc Indigo™ Series Ice Machines With R290 Refrigerant 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 STH038 5/12...

  • Page 2: 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 box alerts you to a potential...
  • Page 3 Procedural Notices As you work on Manitowoc equipment, be sure to read the procedural notices in this handbook. These notices supply helpful information which may assist you as you work. Throughout this handbook, you will see the following types of procedural notices: Important Text in an Important box provides you with information that may help you perform a...
  • Page 4 Read These Before Proceeding: ! Caution Proper installation, care and maintenance are essential for maximum performance and trouble- free operation of your Manitowoc equipment. If you encounter problems not covered by this manual, do not proceed, contact Manitowoc Foodservice Group. We will be happy to provide assistance.
  • Page 5 Warning Do not use electrical appliances or accessories other than those supplied by Manitowoc for your ice machine model. Warning Two or more people or a lifting device are required to lift this appliance. Warning This equipment contains high voltage electricity and refrigerant charge.
  • Page 6 Warning Do not operate equipment that has been misused, abused, neglected, damaged, or altered/modified from that of original manufactured specifications. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they...
  • Page 7 Warning It is the responsibility of the equipment owner to perform a Personal Protective Equipment Hazard Assessment to ensure adequate protection during maintenance procedures. Warning Two or more people are required to move this equipment to prevent tipping. Warning Some 50 hz models may contain up to 150 grams of R290 (propane) refrigerant.
  • Page 8 Warning When using electric appliances, basic precautions must always be followed, including the following: a. Read all the instructions before using the appliance. b. To reduce the risk of injury, close supervision is necessary when an appliance is used near children. c.

  • Page 9: Table Of Contents

    Table of Contents General Information How to Read a Model Number ..13 Model/Serial Number Location ..14 Ice Machine Warranty Information ..14 Owner Warranty Registration Card .
  • Page 10 Operation Control Panel Features ....37 Buttons ......37 Display Panel .
  • Page 11 Energy Saver Menu ....56 Ice Program ..... 57 Water Miser .
  • Page 12 Troubleshooting Safety Limits ..... . 85 Safety Limit #1 ....86 Safety Limit #2 .
  • Page 13 Component Check Procedures Electrical Components ....123 Control Board, Display board and Touch Pad ......123 Control Board Relay Test .
  • Page 14 Wiring Diagram Legend ... 173 I0320 ......174 I0500 .

  • Page 15: General Information

    General Information How to Read a Model Number Part Number STH038 5/12...

  • Page 16: Model/Serial Number Location

    Model/Serial Number Location These numbers are required when requesting information from your local Manitowoc Distributor, service representative, or Manitowoc Ice. The model and serial number are listed on the OWNER WARRANTY REGISTRATION CARD. They are also listed on the MODEL/SERIAL NUMBER DECAL affixed to the front and rear of the ice machine.

  • Page 17: 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 18 Additional expenses including without limitation, travel time, overtime premium, material cost, accessing or removal of the ice machine, or shipping are the responsibility of the owner, along with all maintenance, adjustments, cleaning, and ice purchases. Labor covered under this warranty must be performed by a COMPANY Contracted Service Representative or a refrigeration service agency as qualified and authorized by the COMPANY'S local Distributor.

  • Page 19: Installation

    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 20 This Page Intentionally Left Blank Part Number STH038 5/12...

  • Page 21: Installation

    Installation ! Caution The ice machine head section must be protected if it will be subjected to temperatures below 0°C (32°F). Failure caused by exposure to freezing temperatures is not covered by the warranty. See “Removal from Service/Winterization” page 36. Warning An ice machine contains high voltage electricity and refrigerant charge.

  • Page 22: Location Of Ice Machine

    Location of Ice Machine The location selected for the ice machine must meet the following criteria. If any of these criteria are not met, select another location. • The location must be free of airborne and other contaminants. • Air temperature - Minimum 1.6°C maximum 43°C. •...

  • Page 23: Clearance Requirements

    Clearance Requirements I0320 Self-Contained Air-Cooled Top/Sides 305 mm Back 127 mm I0500 Self-Contained Air-Cooled Top/Sides 203 mm Back 127 mm Ice Machine Heat of Rejection Heat of Rejection Series Ice Machine Peak Conditioning* I0320 3800 6000 I0500 6100 6900 *BTU/Hour Because the heat of rejection varies during the ice making cycle, the figure shown is an average.

  • Page 24: Ice Deflector

    ICE DEFLECTOR INSTALLATION ON A BIN An ice deflector is required for all bin installations and is included with all Manitowoc bins. Order the appropriate deflector kit for any bin without a deflector. Align sides and back of ice machine with sides and back of bin, when placing ice machine on bin..

  • Page 25: Electrical Requirements

    Electrical Requirements Voltage The maximum allowable voltage variation is +10/-0% of the rated voltage on the ice machine model/serial number plate at start-up (when the electrical load is highest). Fuse/Breaker A separate fuse/circuit breaker must be provided for each ice machine. Total Circuit Ampacity The total circuit ampacity is used to help select the wire size of the electrical supply.
  • Page 26 This Page Intentionally Left Blank Part Number STH038 5/12...

  • Page 27: Maintenance

    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. Warning...
  • Page 28 ! Caution Use only Manitowoc approved Ice Machine Cleaner Sanitizer this application (Manitowoc Cleaner part number 94-0546-3 and Manitowoc Sanitizer part number 94-0565-3). It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling. Read and understand all labels printed on bottles before use.

  • Page 29: Cleaning/Sanitizing Procedure

    CLEANING/SANITIZING PROCEDURE This procedure must be performed a minimum of once every six months. • The ice machine and bin must be disassembled cleaned and sanitized. • All ice produced during the cleaning and sanitizing procedures must be discarded. • Removes mineral deposits from areas or surfaces that are in direct contact with water.

  • Page 30: Cleaning / Sanitizing Procedure

    Cleaning / Sanitizing Procedure ! Caution Use only Manitowoc approved Ice Machine Cleaner Sanitizer this application (Manitowoc Cleaner part number 94-0546-3 and Manitowoc Sanitizer part number 94-0565-3). It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling. Read and understand all labels printed on bottles before use.
  • Page 31 Wait until the water trough refills and the display indicates add solution (approximately 1 minute), then add the proper amount of ice machine cleaner. Model Amount of Cleaner I0320 90 ml (3 oz) I0500 150 ml (5 oz) Part Number STH038 5/12...
  • Page 32 Step 4 Wait until the clean cycle is complete (approximately 24 minutes). Then disconnect power to the ice machine (and dispenser when used). Warning Disconnect the electric power to the ice machine at the electric service switch box. Step 5 Remove parts for cleaning.. O f f O n / O f f M o d e A.
  • Page 33 C. 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 34 Step 6 Disassemble distribution tube by loosening the two (2) middle thumbscrews and dividing. Mix a solution of cleaner and lukewarm 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.

  • Page 35: Sanitizing Procedure

    Step 8 While components are soaking, use 1/2 of the cleaner/water solution to clean all food zone surfaces of the ice machine and bin (or dispenser). Use a nylon brush or cloth to thoroughly clean the following ice machine areas: •...
  • Page 36 Clean button. Step 15 Wait until the water trough refills and the display indicates add solution (approximately 1 minute). Add the proper amount of Manitowoc Ice Machine Sanitizer to the water trough by pouring between the water curtain and evaporator.
  • Page 37 Ice Thickness Probe & Water Level Probe Clean the probes using the following procedure. 1. Mix a solution of Manitowoc ice machine cleaner and water 60 ml (2 oz) of cleaner to 500 ml (16 oz) of water in a container.

  • Page 38: Removal From Service/Winterization

    Removal from Service/Winterization General Special precautions must be taken if the ice machine is to be removed from service for an extended period of time or exposed to ambient temperatures of 0°C (32°F) or below. ! Caution If water is allowed to remain in the ice machine in freezing temperatures, severe damage to some components could result.

  • Page 39: Operation

    Power Button Cleaning Button Manitowoc LCD Display Navigation Arrows Menu Checkmark Button Operation Control Panel Features The control panel offers a series of pressure sensitive buttons and a four-line interactive display panel. BUTTONS Powers the ice machine when in the Power Button: On/Off Mode.

  • Page 40: Display Panel

    Moves the display from the Home Menu Button: Screen, where ice machine status, alerts and messages are viewed, to the Main Menu, where machine information and its event log can be accessed, machine and Energy Saver settings can be adjusted, and service issues can be addressed. The Left arrow moves the Left and Right Arrows: display to the previous screen, allowing the user to...

  • Page 41: Menu Navigation Overview

    Menu Navigation Overview Menu Navigation Overview AuCS On/Off Clean Timer Button Button Initiated Press Left Arrow From Main Menu Home Screen AuCS Clean Clean Function Function When When Alert Message Present Present Menu Alerts Messages Button Menu Menu Main Menu Function (Optional) Password Entry Energy...

  • Page 42: Display Panel Navigation

    Display Panel Navigation [ L a n g u a g e > ] ▼ T i m e & D a t e > T i m e C o n f i g > U n i t s >...
  • Page 43 A cursor (underline) is used within lines Cursor: where actual settings can be adjusted. In these screens, use the Up and Down arrows to make changes to the value underlined. Move the cursor from digit to digit using the Right and Left arrows. Use the Checkmark to move the cursor down one line.

  • Page 44: Alerts And Messages

    Alerts and Messages When messages and alerts exist, they will be highlighted and can be selected with the Left arrow. Alerts displayed will have priority over messages. O f f O n / O f f M o d e For example, if alerts are appearing in the fourth line of the display: 1.

  • Page 45: Main Menu

    Machine Info Set-Up Energy Saver Factory Defaults Service Exit Main Menu Main Menu From the Home screen, press the Menu button to enter the Main menu, where you can choose to see machine information, make setup changes, set the Energy Saver mode, or enter the Service Menu. Part Number STH038 5/12...

  • Page 46: Machine Info Menu

    Machine Info Menu From the Main menu, ensure that Machine Info is highlighted and press the Checkmark to view a list including capacity, model number, IMH (Ice Machine Head) serial number, condenser serial number, warranty, installation date, date of manufacture and software version.

  • Page 47: Password Entry

    Password Entry A password is not required, although a password can be turned on to prevent unauthorized control setting modification. You can use the Factory Default Password of "1234" or enter a four digit custom pin number of your choosing. To turn on the password feature use the following procedure.
  • Page 48 To enter a four digit password of your choosing use the following procedure. 1. Press the Menu button. 2. From the Main menu, use the Down arrow to highlight setup and press the Right arrow. 3. Use the Down arrow to select Edit Password and press the Right arrow.

  • Page 49: Reset Password To Factory Defaults

    RESET PASSWORD TO FACTORY DEFAULTS The password can be reset to the factory defaults when required. The default factory password is 1234. To reset the ice machine to factory defaults use the following procedure. 1. Press the Menu button. 2. From the Main menu, use the Down arrow to highlight Defaults 3.

  • Page 50: Set-Up Menu

    Set-Up Menu From the Main menu, use the Down arrow to navigate to Set-Up and press the Checkmark. Select and customize machine settings on this menu. Press the Left arrow to return to previous screens. LANGUAGE 1. From the Set-Up menu, use the Down arrow to highlight Language.
  • Page 51 4. Press the Checkmark. The date will appear on the first line of the display (Mo/Day/Yr) and the time will appear on the second line (24 Hour). The month will have a blinking cursor. 5. Using the Up or Down arrow, adjust the month, if necessary.

  • Page 52: Time Configuration

    TIME CONFIGURATION 1. From the Set-Up menu, use the Down arrow to highlight Time Config. 2. Press the Checkmark. On this screen, you can choose whether the date will be displayed as Mo/Day/Yr or Day/Mo/Yr by highlighting your choice and pressing the Checkmark. Selecting one will deselect the other.

  • Page 53: Ice Clarity

    ICE CLARITY In areas with poor potable water quality, the ice machine makes cloudy ice. Setting Ice Clarity to ON will add additional water during the freeze cycle to dilute the water that contains a high content of dissolved solids in the water trough. This feature decreases production and increases water usage.

  • Page 54: Password On

    PASSWORD ON A password can be added to prevent unauthorized changes to ice machine settings. 1. From the Set-Up menu, use the Down arrow to highlight Password On. 2. Enter the password and press the Checkmark. 3. Press the Left arrow to return to previous screens and to the Set-Up menu.

  • Page 55: Iaucs Runtime

    IAUCS RUNTIME Automatic Cleaning System is an optional accessory and will perform a cleaning cycle at a set time interval. 1. From the Set-Up menu, use the Down arrow to highlight AuCS RunTime. 2. Press the Checkmark. On this screen, you can choose to turn the feature ON or OFF by highlighting your choice and pressing the Checkmark.

  • Page 56: Water Filter

    WATER FILTER The ice machine has a feature that displays a replace water filter reminder at a set time interval. 1. From the Set-Up menu, use the Down arrow to highlight Water Filter. 2. Press the Checkmark. You can record the filter type on this screen by highlighting Filter Type and pressing the Checkmark.

  • Page 57: Usb Setup

    USB SETUP Refer to “Upgrading Firmware with a Flash Drive” and “Exporting Data to a Flash Drive” for more information on this setting. Flash drives must be correctly sized and formatted - 2 gigabytes or smaller, Fat 32 file system, 512 allocation units - Refer to page 69 for full specification and formatting details.

  • Page 58: Energy Saver Menu

    Energy Saver Menu From the Main menu, use the Down arrow to navigate to Energy Saver and press the Checkmark. Set up an energy saving ice program, enable the Water Miser and view usage statistics from this menu. Press the Left arrow to return to previous screens.

  • Page 59: Ice Program

    ICE PROGRAM To save energy and water, the ice machine can be programmed to only power up during time periods that the ice will be used or when the bin level is being depleted by heavy use. Important Setting an ice program will take the ice machine out of the On/Off Mode and the Power button will be disabled.

  • Page 60: Water Miser

    WATER MISER Water Miser is a feature that reduces water usage by eliminating flush cycles. Enabling this feature is only recommended for systems with de-ionized or reverse osmosis filtering. 1. From the Energy Saver menu, use the Down arrow to highlight Water Miser. 2.

  • Page 61: Service Menu

    Service Menu From the Main menu, use the Down arrow to navigate to Service and press the Checkmark. This menu is intended for the use of trained service personnel. Below is an overview of the service menu. The following pages list the navigation options available by drilling into the menus with the down arrow.
  • Page 62 Part Number STH038 5/12...

  • Page 63: Data History

    DATA HISTORY Press the Checkmark with Data History highlighted to view a list of eight-digit dates (Current, Current + 1 ... Current + 5), along with Lifetime (be sure to use the Down arrow to reveal all the available information). For each of the dates, use the Checkmark to view: •...

  • Page 64: Real Time Data

    REAL TIME DATA Press the Checkmark with Real Time Data highlighted to get readings on Time & Temp, Inputs and Outputs (be sure to use the Down arrow to reveal all the available information). Use the Checkmark to view: Time and Temperature •...
  • Page 65 Outputs • Status Off/On - Displays stage of cycle • Water Pump Off/On • Hot Gas Valve 1 Off/On • Hot Gas Valve 2 Off/On • Air Pump Off/On • Water Valve Off/On • Dump Valve Off/On • Compressor Control Off/On •...

  • Page 66: Diagnostics

    DIAGNOSTICS Press the Checkmark with Diagnostics highlighted to enter screens where you can run diagnostics on the control board, sensors and switches. Control Board • Self Check • Enable Relays • Exit Temperature Sensors • T1 Thermistor Temperature • T2 Thermistor Temperature •...

  • Page 67: Manual Harvest

    MANUAL HARVEST Press the Checkmark with Manual Harvest highlighted to initiate a manual harvest. Manual Harvest • Harvest Started • Exit REPLACE CONTROL BOARD Press the Checkmark with Replace Control Board highlighted to program the replacement control board. The data can copied from the defective control board (refer to exporting data to a flash drive page xx), or entered manually through the Indigo interface.

  • Page 68: Event Log Menu

    EVENT LOG MENU From the Service menu, use the Down arrow to navigate to Event Log and press the Checkmark. Ensure View ELog is highlighted and press the Checkmark to see the first event code, when it occurred and how many times. Use the Down arrow to view information on subsequent event codes.

  • Page 69: Event Log

    EVENT LOG Refer to the following table for Event Code descriptions. Code Description Long Freeze Cycle Long Harvest Cycle Input Power Loss High Condenser Temperature High Pressure Control Opened Spare Starving TXV or Low On Charge TXV Fault #1 Evaporator Flooding #2 Evaporator Flooding Refrigeration Fault Curtain Switch Fault - Open more than 12 hours...

  • Page 70: Detail Event Log Service Definition

    Event Log Detail Detail Event Log Service Definition E-Log Display Text Error Description Definition Long Freeze 6 consecutive 60 Minute Freeze cycles = shut down and flash the SL#1 light on board Long Freeze Long Harvest Long Harvest 3 consecutive - 3.5 Minute Harvests logs SL#2 in memory, but runs until 500 long harvest cycles occur. When power is interrupted to the ice machine the control board will log the event in the ELOG and Power Supply (Event Log only - Power Loss...
  • Page 71 Detail Event Log Service Definition Definition E-Log Display Text Error Description The compressor discharge temperature did not increase by at least 10 F, and the evaporator Refrigeration System (Refrig Refig Fault temperature did not decreased by at least 10 F - Measured from Refrigeration Start up to Two Minutes Fault) into the Freeze cycle.
  • Page 72 Detail Event Log Service Definition E-Log Display Text Error Description Definition T1 Fault T1 Sensor Each thermistor reading is monitored continuously using six second average values. During Pre-chill T2 Fault T2 Sensor a thermistor had a six second average thermistor values fall outside of the valid temperature range. T3 Fault T3 Sensor T4 Fault...

  • Page 73: Usb Flash Drive Specifications And Formatting

    USB FLASH DRIVE SPECIFICATIONS AND FORMATTING Updating firmware on Indigo™ model ice machines requires a properly formatted 2 GB or smaller USB flash drive. All USB flash drives must be formatted before use to remove any software programs or files currently on the flash drive.
  • Page 74 Windows XP Computers: 1. Insert USB flash drive; your computer may indicate: • “Found New Hardware” follow the prompts to install the USB flash drive • USB flash drive may auto launch - Close auto launch window. 2. To access Disk Management: •...

  • Page 75: Upgrading Firmware With A Flash Drive Or Transferring Setup Data To Multiple Machines

    UPGRADING FIRMWARE WITH A FLASH DRIVE OR TRANSFERRING SETUP DATA TO MULTIPLE MACHINES Important The flash drive must be formatted before using, All files and software on the flash drive are removed during the formatting process. Refer to page 69 USB Flash Drive Specifications and Formatting.
  • Page 76 USB Connector Bin Switches Thermostat Display Light Micro Light Thermistors Clean Light Harvest Light SL-1 Light SL-2 Light Dump Valve Transformer Left Bin Switch Light Right Bin Switch Light Water Level Probe Light Display Ice Thickness Probe Light RS485 RT Harvest Bin LED Compressor Battery...

  • Page 77: Exporting Data To A Flash Drive

    EXPORTING DATA TO A FLASH DRIVE Data can be copied from the control board memory to a flash drive and used to transfer setup and/or cycle data to a replacement control board or to transfer setup information to multiple ice machines. Data may also be requested by service department personnel for analysis or as an aid to troubleshooting.

  • Page 78: Safe Operation Mode

    Select only “Ice Machine Settings” file when multiple machines will be programmed with the same user specified settings. Select “Export All” if you are installing a replacement board. 8. Highlight Export ALL or Export Setup, depending on your requirements, and press the Checkmark. A display of instructions will appear.

  • Page 79: Operational Checks

    Operational Checks GENERAL Manitowoc ice machines are factory-operated and adjusted before shipment. Normally, new installations do not require any adjustment. To ensure proper operation, always follow the Operational Checks: • when starting the ice machine for the first time •...

  • Page 80: Ice Thickness Check

    ICE THICKNESS CHECK After a harvest cycle, inspect the ice cubes in the ice storage bin. The ice thickness probe is factory-set to maintain the ice bridge thickness at 3 mm (1/8"). NOTE: Make sure the water curtain is in place when performing this check.

  • Page 81: Sequence Of Operation

    Sequence of Operation SELF CONTAINED AIR OR WATER COOLED The power button must be depressed and the NOTE: 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 82 Freeze Sequence 3. Prechill The compressor lowers the temperature of the evaporator(s) before the water pump is energized. The water fill valve will energize and remain on until water completes the water level probe circuit. 4. Freeze The water pump(s) energizes and water flows over the evaporator.
  • Page 83 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 84 Single Evaporator Models 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 Start-Up 45 Seconds 1. Water Purge 2. Refrigeration 5 Seconds System Start-up 5 Seconds Freeze Sequence...
  • Page 85 Single Evaporator Models 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 Harvest Sequence Factory May Cycle Set at On/Off 45 Seconds 5.
  • Page 86 This Page Intentionally Left Blank Part Number STH038 5/12...

  • Page 87: Troubleshooting

    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. 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.

  • Page 88: Safety Limit #1

    SAFETY LIMIT #1 Freeze time exceeds 60 minutes for 6 consecutive freeze cycles. Possible cause list Water System • Loss of water from sump area • Low water pressure 1.37 bar min (20 psig) • High water pressure 5.51 bar max (80 psig) •...

  • Page 89: Safety Limit #2

    SAFETY LIMIT #2 Harvest time exceeds 3.5 minutes for 500 consecutive harvest cycles Possible Cause Checklist Improper Installation • Refer to “Installation/Visual Inspection Checklist” page 102 Water System • Loss of water from sump area • Water area (evaporator) dirty •...

  • Page 90: 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 91 Reset To Factory Defaults Before starting troubleshooting procedures, reset the control board to factory defaults to prevent misdiagnosis. Before resetting to factory defaults do one of the following: A. Copy settings to a usb device and flash settings into the control board when diagnostics are complete.

  • Page 92: Symptom #1 Ice Machine Will Not Run

    SYMPTOM #1 ICE MACHINE WILL NOT RUN START Does the ice machine start Is the display interface when the Power button is pushed? energized and functioning? Is there an Alert or Refer to Alert/Error Log Error Logged? Are there any lights on or flashing on the Refer to display &...
  • Page 93 Refer to display & control Display light Line voltage at wires board diagnostics flashing 55 & 56 on 9 pin control heartbeat? board connector? Install the water curtain/damper. Supply power to the ice machine Control board fuse is good? Bin switch light on? All water curtains or (Multi evap all lights on?) dampers in place?
  • Page 94 Is magnet on the Replace the water water curtain/damper curtain/damper. Press power button to start ice making, does safety limit light flash? Refer to bin switch diagnostics. Ice machine starts? Refer to Safety Limit #1 long freeze cycle Which light flashes? Refer to display &...
  • Page 95 Diagnosing an Ice Machine That Will Not Run Warning High (line) voltage is applied to the control board (terminals #55 and #56) at all times. Removing control board fuse or pressing the power button will not remove the power supplied to the control board. 1.

  • Page 96: Symptom #2 Low Production, Long Freeze

    SYMPTOM #2 LOW PRODUCTION, LONG FREEZE Ice Machine has a Long Freeze Cycle. Ice Formation is Thick Thin 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 problems which can cause good refrigeration...
  • Page 97 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 98: Symptom #2 - Freeze Cycle Refrigeration System Operational Analysis Tables

    SYMPTOM #2 - FREEZE CYCLE REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES SINGLE EXPANSION VALVE SELF CONTAINED AIR and WATERCOOLED CONDENSER 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 99 SINGLE EXPANSION VALVE SELF CONTAINED AIR and WATERCOOLED CONDENSER Operational Analysis Suction Line Temperature Normal or High Normal or High Normal or High 3 minutes into the freeze cycle If suction temperature is High or Low refer to freeze cycle high or low suction temperature problem Freeze Cycle checklist page 109 to eliminate problems and/or components not listed on this table before proceeding.
  • Page 100 SINGLE EXPANSION VALVE SELF CONTAINED AIR and WATERCOOLED CONDENSER 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-...
  • Page 101 Before Beginning Service Ice machines may experience operational problems only during certain times of the day or night. A machine may function properly while it is being serviced, but malfunctions later. Information provided by the user can help the technician start in the right direction, and may be a determining factor in the final diagnosis.
  • Page 102 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 21°C ambient temperature and 10°C water produces more ice than the same model condensing unit with a 32°C ambient temperature and 21°C water.
  • Page 103 Weighing the ice is the only 100% accurate check. However, if the ice pattern is normal and the 3 mm bridge thickness is maintained, the ice slab weights listed with the 24-Hour Ice Production Charts may be used. 3. Compare the results of step 3 with step 2. Ice production checks that are within 10% of the chart are considered normal.
  • Page 104 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 105 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 1-5 Bar, 138-552 kPa.
  • Page 106 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 107 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 108 Analyzing Discharge Temperature 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 Temperature (starting on page 167) for ice machine being checked. Use the operating conditions determined in step 1 to find the published normal discharge temperatures.
  • Page 109 FREEZE CYCLE DISCHARGE TEMPERATURE HIGH CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 102) Air Condenser • Dirty condenser filter • Dirty condenser fins • High inlet air temperature • Condenser discharge air recirculation • Defective fan cycling control (page 154) •...
  • Page 110 FREEZE CYCLE DISCHARGE TEMPERATURE LOW CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 102) Other • Undercharged • Wrong type of refrigerant • Non-Manitowoc components in system • Liquid line/component restricted Part Number STH038 5/12...
  • Page 111 Analyzing Suction Temperature The suction temperature gradually drops throughout the freeze cycle. The actual suction temperature (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 temperature drop throughout the freeze cycle, compare the published suction temperature to the published freeze cycle time.
  • Page 112 Suction Temperature High Checklist Improper Installation • Refer to “Installation/Visual Inspection Checklist” page 102 Discharge Temperature • Discharge temperature is too high and is affecting suction temperature – refer to “Freeze Cycle Discharge Temperature High Checklist” (page 107) Improper Refrigerant Charge •...
  • Page 113 SUCTION TEMPERATURE LOW CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 102) Discharge Temperature • Discharge temperature is too low and is affecting low side – refer to “Freeze Cycle Discharge Temperature Low Checklist” (page 108) Improper Refrigerant Charge •...
  • Page 114 Comparing Evaporator Inlet and Outlet Temperatures The temperatures of the suction line 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 115 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 116 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 117 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 118 Final Analysis The column with the highest number of Checkmarks 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, not the harvest cycle. A low refrigerant charge normally affects both cycles.
  • Page 119 COLUMN 3 - TXV FLOODING OR REFRIGERANT OVERCHARGE A loose or improperly mounted expansion valve bulb causes the expansion valve to flood. Check bulb mounting, insulation, etc., before changing the valve. Verify refrigerant amount is correct by weighing recovered refrigerant before replacing a TXV. COLUMN 4 - COMPRESSOR Replace the compressor.

  • Page 120: Symptom #3 Harvest Problems

    SYMPTOM #3 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 121: Symptom #3 Will Not Harvest, Cubes Not Melted

    SYMPTOM #3 WILL NOT HARVEST, CUBES NOT MELTED Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Not Melted After Harvest START Refer to Discharge line temperature is normal Low production, Symptom #2 at the end of the freeze cycle? Normal fill pattern, long Freeze Cycle harvest cycle, Possible SL #2,...
  • Page 122 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...

  • Page 123: Symptom #4 Will Not Harvest, Cubes Melted

    SYMPTOM #4 WILL NOT HARVEST, CUBES MELTED Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Melted After Harvest START Are back of the cubes Is Ice Level Ice melted at end of Machine level? Machine harvest cycle? Refer to...
  • Page 124 Is the evaporator dirty? (Dry evaporator first then check) Discharge line temperature is normal at the end of the freeze cycle? Refer to Symptom #2 Refer to Heavily Scaled Refer to Manual Freeze Cycle Operational Cleaning Procedure Cleaning Procedure Analysis Table...

  • Page 125: Component Check Procedures

    Component Check Procedures Electrical Components CONTROL BOARD, DISPLAY BOARD AND TOUCH FUNCTION The control board, display board and touch pad provide user input and control the ice machine sequence of operation. NOTE: Anytime power is supplied to wires #55 & #56 on the control board, the “Display”...
  • Page 126 Control Board Diagnostics 1. Micro light is not flashing a heartbeat. 2. Disconnect line voltage power supply to the ice machine and wait a minimum of 15 seconds, then reapply power. A. Micro light flashes - continue with step 3. B.
  • Page 127 Touch Pad Diagnostics Follow the control board diagnostics to the Status Passed display. Perform the following keystrokes on the display. • Display reads Status Passed, press the right arrow • Display reads Pass Yes, press the right arrow • Display reads Key Pad Test, press the right arrow 4.

  • Page 128: Control Board Relay Test

    CONTROL BOARD RELAY TEST The control board can be set to energize all relays for 3.5 minutes. This allows testing to verify control board relays are closed and line voltage is available for ice machine components - Water pump, dump valve, water inlet valve, harvest valve(s), air compressor, contactor/compressor/fan motor - The fan cycle control must close to energize the fan motor.
  • Page 129 4. Test for line voltage at the individual components. A. Line voltage is present and the component is non functional - Replace component B. Voltage is not present at the component - Proceed to step 5 5. Refer to wiring diagram and determine wire location on the 9 pin molex connector for the component you are testing.

  • Page 130: Usb Flash Drive Specifications And Formatting

    USB FLASH DRIVE SPECIFICATIONS AND FORMATTING Updating firmware on Indigo™ model ice machines requires a properly formatted 2 GB or smaller USB flash drive. All USB flash drives must be formatted before use to remove any software programs or files currently on the flash drive.
  • Page 131 Windows 7 or Windows Vista Computers: 1. Insert USB flash drive; your computer may indicate: • “Found New Hardware” follow the prompts to install the USB flash drive • USB flash drive may auto play - Close auto play window 2.
  • Page 132 Windows XP Computers: 1. Insert USB flash drive; your computer may indicate: • “Found New Hardware” follow the prompts to install the USB flash drive • USB flash drive may auto launch - Close auto launch window. 2. To access Disk Management: •...

  • Page 133: Upgrading Firmware With A Flash Drive Or Transferring Setup Data To Multiple Machines

    UPGRADING FIRMWARE WITH A FLASH DRIVE OR TRANSFERRING SETUP DATA TO MULTIPLE MACHINES Important Do not use a flash drive with a built-in software program, such as Sandisk brand. 1. Refer to USB Flashdrive Specifications and Formatting page 128 and prepare the flash drive. 2.
  • Page 134 11. Follow these on-screen instructions to: A. Insert Drive (Insert the flash drive into the USB port on the ice machine’s control board.) B. Press Check (Press the Checkmark.) C. Wait For Comp (Wait approximately 5 to 10 minutes for the Firmware upgrade to complete.

  • Page 135: Exporting Data To A Flash Drive

    EXPORTING DATA TO A FLASH DRIVE Data can be copied from the control board memory to a flash drive and used to transfer setup and/or cycle data to a replacement control board or to transfer setup information to multiple ice machines. Data may also be requested by service department personnel for analysis or as an aid to troubleshooting.
  • Page 136 7. Press the Checkmark again. A submenu with Export ALL and Export Setup appears. NOTE: There are four files stored in ice machine memory: • Asset Data - ASDATAoo.CSV • Operating Data - OPDATAoo.CSV • Real Time Data - RTDATAoo.CSV •...

  • Page 137: Programming A Replacement Control Board

    PROGRAMMING A REPLACEMENT CONTROL BOARD Indigo™ replacement control boards require the Model and Serial number to be entered to activate the appropriate look up tables for operation and diagnostic. This can be done two different ways, USB Setup or Manual Setup. USB Setup - Applicable when the control board is operational and has a mechanical issue such as a sticking relay.
  • Page 138 Manual Setup - Applicable when the control board is non-operational or data from the faulty board is suspect. Install replacement control board and reapply power. Dependant on firmware version the screen will either display “Manual Setup” directly or you will need to navigate to the screen.

  • Page 139: Main Fuse

    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, 8 amp. Warning High (line) voltage is applied to the control board (terminals #55 and #56) at all times. Removing the control board fuse or pressing the On/Off button will not remove the power supplied to the control board.

  • Page 140: 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 141 SPECIFICATIONS The bin switch is a magnetically operated reed switch. The magnet is attached to the lower right corner of the water curtain/ice dampers. The bin switch is connected to a varying D.C. voltage circuit. (Voltage does not remain constant.) Because of a wide variation in D.C.
  • Page 142 DIAGNOSTICS 1. Verify bin switch, damper and damper magnet are in place. • Press the Menu button. • Scroll down to Service and press right arrow. • Scroll down to Diagnostics and press right arrow • Scroll down to Inputs and press right arrow to display curtain switch readings (Curt SW1, Curt SW2, etc).

  • Page 143: Water Level Control Circuitry

    WATER LEVEL CONTROL CIRCUITRY FUNCTION The water level probe controls the water level by sensing whether water is or is not contacting the water level probe. The water level probe has three sensing probes. Two probes are equal in length and are used to measures conductivity for diagnostics, ice clarity and water miser options.
  • Page 144 Freeze Cycle Operation During the Freeze cycle, the water inlet valve energizes and de-energizes in conjunction with the water level probe located in the water trough. During the first 45 seconds of the Freeze cycle: • The water inlet valve is ON when there is no water in contact with the water level probes.
  • Page 145 WATER TROUGH OVERFILLING DURING THE FREEZE CYCLE Step 1 Press the power button and turn off the ice machine. Step 2 If water continues to flow with the ice machine off, disconnect power. If water continues to flow verify water pressure is below 80 psig before replacing the water inlet valve.
  • Page 146 Step 6. Water level probe wires #2 & #3 jumpered at the control board connector Is Water The Water Flowing Water Inlet Valve into the Level Cause Solenoid Water Light Coil Is: Trough? interconnecting wire or water level probe is causing De-energized the problem.
  • Page 147 WATER WILL NOT RUN INTO THE SUMP TROUGH DURING THE FREEZE CYCLE Step 1 Verify water is supplied to the ice machine. Step 2 Scroll to Service/Diagnostics/Inputs and press down arrow until Wtr Low and Wtr High are displayed. A. Yes is displayed - Control board is receiving a sensing water signal.

  • Page 148: Ice Thickness Probe (Harvest Initiation)

    ICE THICKNESS PROBE (HARVEST INITIATION) FUNCTION The ice thickness probe senses ice on the evaporator and signals the control board to start a harvest cycle. After ice forms on the evaporator, the ice will contact the ice thickness probe and a harvest cycle is initiated. SPECIFICATIONS Freeze Time Lock-In Feature The ice machine control system incorporates a freeze...
  • Page 149 Ice Thickness Check The ice thickness probe is factory-set to maintain the ice bridge thickness at 3 mm. Make sure the water curtain/splash shields NOTE: are in place when performing this check. It prevents water from splashing out of the water trough. 1.
  • Page 150 Diagnostics SYMPTOMS Premature harvest • Display indicates ITP Failure • Low ice production • Thin ice in bin • Freeze cycles are faster than published cycle times Will not harvest • Display indicates ITP Failure • Low ice production • Thick ice in bin •...
  • Page 151 ICE MACHINE CYCLES INTO HARVEST BEFORE ICE CONTACTS THE ICE THICKNESS PROBE 1. Reboot the control board by disconnecting and reconnecting line voltage to the ice machine. 2. Verify ice thickness probe gap is approximately 7 mm. 3. Wait six minutes: •...
  • Page 152 ICE MACHINE DOES NOT CYCLE INTO HARVEST If ice is on the evaporator initiate a manual harvest cycle by performing the following keystrokes. • Press Menu • Scroll down to Service and press right arrow • Scroll down to Manual Harvest and press right arrow - A new freeze cycle will start after the manual harvest cycle is complete.

  • Page 153: High Pressure Cutout (Hpco) Control

    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. Specifications Cut-Out Cut-In 2413 kPa ±24.13 bar ±.69 Automatic Reset 350 psig ±10 Must be below 1723 kPa 17.23 bar (250 psig) to reset.

  • Page 154: Hpco Check Procedure

    CHECK PROCEDURE Symptom #1 Machine is off and the display indicates “Delay xx min, HPCO Active”. 1. Leave all wiring connectors attached and perform testing within the 60 minute time delay period 2. Check for line voltage at P9 connector on control board (Two wire connector adjacent to 9 pin connector).
  • Page 155 Symptom #2 Machine is running and the display indicates “HPC Fault” and an alert triangle 1. Navigate to the event log on the Service menu. Scroll down to HPC Fault #5. Open the event and view when and how often HPCO Fault has occurred.

  • Page 156: Fan Cycle Control

    The fan cycle control closes on an increase, and opens on a decrease in discharge pressure. SPECIFICATIONS Specifications Cut-Out Model Cut-In (Close) (Open) I0320 1723 kPa ±.34 1517 kPa ±.34 I0520 (17.23 bar ±.34) (15.17 bar ±.34) CHECK PROCEDURE 1. Verify fan motor windings are not open or grounded, and fan spins freely.

  • Page 157: Thermistors

    THERMISTORS FUNCTION Thermistor resistance values change with temperature. The value supplied to the control board is used to identify temperature at the thermistor location. SPECIFICATIONS Temperature of Thermistor Resistance °C °F K Ohms (x 1000) -30° - -20° -22° - -4° 820.85 - 466.35 -20°...
  • Page 158 Four thermistors are located on the ice machine. They are labeled T1, T2, T3, T4 T1 - Air or Water cooled Models • Liquid line temperature sensor located at the outlet of the condenser. T2 - Air or Water cooled Models •...
  • Page 159 Thermistor Matrix Part Number STH038 5/12...
  • Page 160 SYMPTOM Alert icon on the display is flashing and the alert indicates a T1, T2, T3, or T4 Fault. CHECK PROCEDURE • Press the Menu button. • Scroll down to Service and press right arrow. • Scroll down to Diagnostics and press right arrow •...

  • Page 161: 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 230 Volt - matches the ice machine voltage. CHECK PROCEDURE 1. The air pump is wired in parallel with the harvest valve - Verify the ice machine is in the harvest cycle and the harvest valve is energized.

  • Page 162: 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 163 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 164: 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 165 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 166 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 127°C and the start winding out of the circuit.
  • Page 167 PTCR Operation Check 1. Visually inspect the PTCR. Check for signs of physical damage. The PTCR case temperature may reach NOTE: 100°C while the compressor is running. This is normal. Do not change a PTCR just because it is hot. 2.

  • Page 168: Refrigerant Recovery/Evacuation/Charging Procedures

    LIQUID LINE 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 filters on both the inlet and outlet ends.

  • Page 169: Cycle Times/24-Hour Ice Production/Charts

    Charts Cycle Times/24-Hour Ice Production/ Charts These charts are used as guidelines to verify correct ice machine operation. Accurate collection of data is essential to obtain the correct diagnosis. • Ice production checks that are within 10% of the chart are considered normal. This is due to variances in water and air temperature.

  • Page 170: I0320A Air-Cooled Model

    I0320A AIR-COOLED MODEL CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C/°F Condenser Time °C/°F 10°C/50°F 21°C/70°F 32°C/90°F 21°C/70°F 27°C/80°F DATA 1-2.5 32°C/90°F 38°C/100°F 1 Times in minutes 24 HOUR ICE PRODUCTION Water Temperature °C/°F Air Temp.
  • Page 171 21°C Water Temperature Air Temp Freeze Cycle Harvest Cycle Entering Discharge Suction Discharge Suction Condenser Temp Temp Temp Temp °F/°C 10°C 50°F 21°C DATA 70°F 27°C 80°F 32°C 90°F 38°C 100°F 1 Suction temperature drops gradually throughout the freeze cycle 32°C Water Temperature Air Temp Freeze Cycle...

  • Page 172: I0500A Air-Cooled Model

    I0500A AIR-COOLED MODEL CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C/°F Condenser Time °C/°F 10°C/50°F 21°C/70°F 32°C/90°F 13.4-15.3 14.5-16.5 15.7-17.9 21°C/70°F 14.5-16.5 15.5-17.7 16.6-19.0 27°C/80°F 1-2.5 15.7-17.9 16.9-19.3 18.9-21.5 32°C/90°F 17.2-19.6...
  • Page 173 21°C Water Temperature Air Temp Freeze Cycle Harvest Cycle Entering Discharge Suction Discharge Suction Condenser Temp Temp Temp Temp °F/°C 77 / 85 -6 / -11 46 / 52 2 / 13 10°C 170 / 185 21 / 11 115 / 125 35 / 55 50°F 23 / 88...
  • Page 174 This Page Intentionally Left Blank Part Number STH038 5/12...

  • Page 175: 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 disconnect power before working on electrical circuitry. WIRING DIAGRAM LEGEND The following symbols are used on all of the wiring diagrams: Internal Compressor Overload (Some models have external...

  • Page 176: I0320

    I0320 Self Contained - 1 Ph Part Number STH038 5/12...

  • Page 177: I0500

    I0500 Self Contained - 1 Ph Part Number STH038 5/12...

  • Page 178: Electronic Control Board

    Electronic Control Board Bin Switches Thermostat Display Light Micro Light Thermistors Clean Light Harvest Light SL-1 Light SL-2 Light Dump Valve Transformer Left Bin Switch Light Right Bin Switch Light Water Level Probe Light Display Ice Thickness Probe Light RS485 RT Harvest Bin LED Compressor...

  • Page 179: Refrigeration Tubing Schematics

    Refrigeration Tubing Schematics T 4 T h e r m i s t o r E VA P O R ATO R H E AT E X C H A N G E R EXPANSION VALVE T 3 T h e r m i s t o r H O T G A S S O L E N O I D VA LV E A I R O R WAT E R C O M P R E S S O R...
  • Page 180 Part Number STH038 5/12...
  • Page 182 Manitowoc Ice 2110 South 26th Street, P.O. Box 1720 Manitowoc, WI 54221-1720, USA Ph: 001-920-682-0161 Fax: 001-920-683-7589 Visit us online at: www.manitowocfsg.com © 2012 Manitowoc Part Number STH038 5/12...

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