Manitowoc Indigo™ Series Air/Water/Remote Condenser 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.
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 personal injury situation. Be sure to read the Warning statement before proceeding, and work carefully.
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 installation, care and maintenance are essential for maximum performance and troublefree operation of your Manitowoc equipment. If you encounter problems not covered by this handbook, do not proceed, contact Manitowoc Foodservice. We will be happy to provide assistance.
Table of Contents General Information How to Read a Model Number . . . . . . . . . 11 Head Sections . . . . . . . . . . . . . . . . . . . 11 Ice Cube Sizes . . . . . . . . . . . . . . . . . . . . . 12 Model/Serial Number Location . . . . . . . . 13 Model Numbers . . . . . . . . . . . . . . . . . . . . . 14 Air-Water-Remote Condenser Models 14 Ice Machine Warranty Information . . . . . 15 Owner Warranty Registration Card . . . 15 Commercial Warranty Coverage . . . . .
Maintenance Cleaning and Sanitizing . . . . . . . . . . . . . 37 General . . . . . . . . . . . . . . . . . . . . . . . . 37 Cleaning/Sanitizing Procedure . . . . . . 39 Preventative Maintenance Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Exterior Cleaning . . . . . . . . . . . . . . . . 39 Cleaning / Sanitizing Procedure . . . . . . . 40 Cleaning Procedure . . . . . . . . . . . . . . 40 Sanitizing Procedure . . . . . . . . . . . . . 43 Parts Removal for Cleaning/Sanitizing.
Set-Up Menu . . . . . . . . . . . . . . . . . . . . . . . 68 Language . . . . . . . . . . . . . . . . . . . . . . 68 Time & Date . . . . . . . . . . . . . . . . . . . . 68 Time Configuration . . . . . . . . . . . . . . . 70 Units . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Ice Clarity . . . . . . . . . . . . . . . . . . . . . . 71 LCD Brightness . . . . . . . . . . . . . . . . . . 71 Password On . . . . . . . . . . . . . . . . . . . . 72 Edit password . . . . . . . . . . . . . . . . . . .
Operational Checks . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . . . . . . Ice Thickness Check . . . . . . . . . . . . . Sequence of Operation . . . . . . . . . . . . . . Self Contained Air or Water Cooled . . Remote Condenser . . . . . . . . . . . . . . 97 97 98 99 99 104 Troubleshooting Safety Limits . . . . . . . . . . . . . . . . . . . . . . 109 Analyzing Why a Safety Limit Stopped the Ice Machine . . . . . . . . . . . . . . . . . . . . 110 Safety Limit #1 . . . . . .
Component Check Procedures Electrical Components . . . . . . . . . . . . . . . 157 Control Board, Display board and Touch Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 Control Board Relay Test . . . . . . . . . . 160 USB Flash Drive Specifications and Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . 162 Upgrading Firmware with a Flash Drive or Transferring Setup Data To Multiple Machines . . . . . . . . . . . . . . . . . . . . . . . . . 164 Exporting Data to a Flash Drive . .
System Contamination Clean-Up . . . . . . 216 Determining Severity Of Contamination 216 Cleanup Procedure . . . . . . . . . . . . . . 218 Replacing Pressure Controls Without Removing Refrigerant Charge . . . . . . . . 221 Liquid Line Filter-Driers . . . . . . . . . . . 223 Total System Refrigerant Charge . . . . 224 Charts Cycle Times/24-Hour Ice Production/ Refrigerant Pressure Charts . . . . . . . . . . I0300 Series . . . . . . . . . . . . . . . . . . . . I0320 Series . . . . . . . . . . . . . . . . . . .
Part Number STH025 02/12 Ice Machine Series ICE MACHINE MODEL I - Indigo Model IB - Ice Beverage ICE CUBE SIZE R - Regular D - Dice Y - Half-Dice Not Used On IB Models # HERTZ 5 - 50HZ 6 - 60HZ CONDENSER TYPE A - Self-Contained Air -Cooled W - Self-Contained Water -Cooled N - Remote Air-Cooled C - CVD Air-Cooled DC - IB Dice Model 3 - Three Phase YC - IB Half Dice E - WRAS 50 Cycle Only NO INDICATOR - 1 Phase 0 to 6 & 8 - Self-Contained Unit 7 & 8 - CVD Remote Condensing Unit 9 - Remote Air-Cooled Conde
Ice Cube Sizes Regular Dice Half Dice 1-1/8" x 1-1/8" x 7/8" 7/8" x 7/8" x 7/8" 3/8" x 1-1/8" x 7/8" 2.86 x 2.86 x 2.22 cm 2.22 x 2.22 x2.22 cm 0.95 x 2.86 x 2.22 cm ! Warning Personal Injury Potential - Do not operate equipment that has been misused, abused, neglected, damaged, or altered/modified from that of original manufactured specifications.
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.
Model Numbers AIR-WATER-REMOTE CONDENSER MODELS Self-Contained Air-Cooled Self-Contained Water-Cooled ID0302A IY0304A ID0303W IY0305W ---- ID0322A IY0324A ID0323W IY0325W ---- IR0520A ID0522A IY0524A IR0421W ID0423W IY0425W ------- ID0452A IY0454A ID0453W IY0455W ---- IR0500A ID0502A IY0504A IR0501W ID0503W IY0505W IR0590N ID0592N IY0594N ID0602A IY0604A ID0603W IY0605W ID0692N IY0694N IR0850A ID0852A IY0854A IR0851W ID0853W IY0855W IR0890N ID0892N IY0894N ID1002A IY1004A ID1003W IY1
Ice Machine Warranty Information OWNER WARRANTY REGISTRATION CARD Warranty coverage begins the day the ice machine is installed. Important Complete and mail the OWNER WARRANTY REGISTRATION CARD as soon as possible to validate the installation date. If the OWNER WARRANTY REGISTRATION CARD is not returned, Manitowoc will use the born on date recorded in the control board or the date of sale to the Manitowoc Distributor as the first day of warranty coverage for your new ice machine.
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 under normal and proper use and maintenance as specified by the COMPANY and upon proper installation and start-up in accordance with the instruction manual supplied with the ice machine.
The foregoing warranty shall not apply to (1) any part or assembly that has been altered, modified, or changed; (2) any part or assembly that has been subjected to misuse, abuse, neglect, or accidents; (3) any ice machine that has been installed and/or maintained inconsistent with the technical instructions provided by the COMPANY; or (4) any ice machine initially installed more than five years from the serial number production date.
RESIDENTIAL ICE MACHINE LIMITED WARRANTY WHAT DOES THIS LIMITED WARRANTY COVER? Subject to the exclusions and limitations below, Manitowoc Ice (“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 warranty period outlined below under normal use and maintenance, and upon proper installation and start-up in accordance with the instruction manual supplied with the Product.
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 straight time labor charges, (2) replace the Product with one that is new or at least as functionally equivalent as the original, or (3) refund the purchase price for the Product.
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 improper or unauthorized alterations, modifications, or changes; and (5) defects or damage to any Product that has not been inst
IN NO EVENT SHALL MANITOWOC OR ANY OF ITS AFFILIATES BE LIABLE TO THE CONSUMER OR ANY OTHER PERSON FOR ANY INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES OF ANY KIND (INCLUDING, WITHOUT LIMITATION, LOSS OF PROFITS, REVENUE OR BUSINESS) ARISING FROM OR IN ANY MANNER CONNECTED WITH THE PRODUCT, ANY BREACH OF THIS LIMITED WARRANTY, OR ANY OTHER CAUSE WHATSOEVER, WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY OF LIABILITY.
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Installation ! Warning PERSONAL INJURY POTENTIAL Remove all ice machine panels before lifting. ! Caution The ice machine head section must be protected if it will be subjected to temperatures below 32°F (0°C). Failure caused by exposure to freezing temperatures is not covered by the warranty. See “Removal from Service/Winterization” page 52. ICE DEFLECTOR An ice deflector is required for all ice machines installed on a bin.
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. • Self contained air and water cooled - The air temperature must be at least 35°F (1.6°C), but must not exceed 110°F (43.4°C).
Clearance Requirements AIR, WATER, REMOTE CONDENSER MODELS I0300 Self-Contained Air-Cooled Self-Contained Water-Cooled Top/Sides 16" (40.6 cm) 8" (20.3 cm) Back 5" (12.7 cm) 5" (12.7 cm) I0450 I0500 - I0600 I0850 - I1000 Self-Contained Air-Cooled Water-Cooled and Remote* Top/Sides 8" (20.3 cm) 8" (20.3 cm) Back 5" (12.7 cm) 5" (12.7 cm) I0320 - I0520 Self-Contained Air-Cooled Water-Cooled and Remote* Top/Sides 12" (30.5 cm) 8" (20.3 cm) Back 5" (12.7 cm) 5" (12.
Ice Machine Heat of Rejection Series Ice Machine Heat of Rejection Air Conditioning* Peak I0300 4600 5450 I0320 3800 6000 I0450 5400 6300 I0500 6100 6900 I0520 5300 6100 I0600 9000 13900 I0850 13000 16000 I1000 16250 18600 I1200 20700 24500 I1400 23500 27000 I1800 30000 35000 *BTU/Hour Because the heat of rejection varies during the ice making cycle, the figure shown is an average.
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 (30” or 48”) for any bin without a deflector.. ! Warning PERSONAL INJURY POTENTIAL Do not operate any ice machine with the deflector removed. Ice Machine on a Dispenser Installation No deflector is needed for machines that match the size of the dispenser (30” head section on a 30” dispenser) unless required by the dispenser manufacturer.
Lineset Applications ! Caution The 60-month compressor warranty (including the 36-month labor replacement warranty) will not apply if the Manitowoc Ice Machine, Condenser or QuietQube® Condensing Unit were not installed according to specifications. This warranty also will not apply if the refrigeration system is modified with a condenser, heat reclaim device, or other parts or assemblies not manufactured by Manitowoc Ice. ! Warning Recovery locations vary by model.
Remote Condenser Ice Machine Remote Single Circuit Condenser I0590N JC0495 I0690N I0890N JC0895 I1090N JC0995 I1490N I1890N JC1395 *Line Set RT RL Discharge Line 1/2" (1.27 cm) 1/2" (1.27 cm) Line Set* RT-20-R404A RT-35-R404A RT-50-R404A RT-20-R404A RT-35-R404A RT-50-R404A RT-20-R404A RT-35-R404A RT-50-R404A RL-20-R404A RL-35-R404A RL-50-R404A Liquid Line 5/16" (.79 cm) 3/8" (.
Additional Refrigerant Charge For 51’ to 100’ Line Sets 30 Ice Machine Condenser I0590N I0690N I0890N I1090N I1490N I1890N JC0495 JC0895 JC0895 JC0995 JC1395 JC1395 Additional Amount of Refrigerant To Be Added To Nameplate Charge 1.5 lbs - 680g 1.
CALCULATING ALLOWABLE LINESET DISTANCE Line Set Length The maximum length is 100' (30.5 m). Line Set Rise/Drop The maximum rise is 35' (10.7 m). The maximum drop is 15' (4.5 m). 35 FT. (10.7 M) MAXIMUM DISTANCE SV1751 35 ft. (10.7 m) Rise: The maximum distance the Condenser or Condensing Unit can be above the ice machine. 15 FT. (4.5 M) MAXIMUM DISTANCE SV1750 15 ft. (4.5 m) Drop: The maximum distance the Condenser or Condensing Unit can be below the ice machine.
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. 1. Insert the measured rise into the formula below. Multiply by 1.7 to get the calculated rise.
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Part Number STH025 02/12 WATER TROUGH WATER CURTAIN WATER LEVEL PROBE ! ] WATER PUMP [ Off On / Off Mode WATER DISTRIBUTION TUBE DISPLAY CONTROL BOX EVAPORATOR REFRIGERATION ACCESS VALVES ICE THICKNESS CONTROL Component Identification I Model Single Evaporator Models 35
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Maintenance Cleaning and Sanitizing GENERAL You are responsible for maintaining the ice machine in accordance with the instructions in this manual. Maintenance procedures are not covered by the warranty. Clean and sanitize the ice machine every six months for efficient operation. If the ice machine requires more frequent cleaning and sanitizing, consult a qualified service company to test the water quality and recommend appropriate water treatment.
! Caution Use only Manitowoc approved Ice Machine Cleaner and Sanitizer for 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. ! Caution Do not mix Cleaner and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.
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.
Cleaning / Sanitizing Procedure ! Caution Use only Manitowoc approved Ice Machine Cleaner and Sanitizer for 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. CLEANING PROCEDURE ! Caution Do not mix Cleaner and Sanitizer solutions together.
Step 1 Open the front door to access the evaporator compartment. Ice must not be on the evaporator during the clean/sanitize cycle. Follow one of the methods below: • Press the power switch at the end of a harvest cycle after ice falls from the evaporator(s). • Press the power switch and allow the ice to melt . ! Caution Never use anything to force ice from the evaporator. Damage may result. Step 2 Remove all ice from the bin/dispenser. Step 3 Press the clean switch.
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. Please refer to the proper parts removal for your ice machine. Continue with step 6 when the parts have been removed. Single Evaporator Ice Machines - page 46 Step 6 Mix a solution of cleaner and lukewarm water.
Step 7 Use 1/2 of the cleaner/water mixture to clean all components. The cleaner solution will foam when it contacts lime scale and mineral deposits; once the foaming stops use a soft-bristle nylon brush, sponge or cloth (NOT a wire brush) to carefully clean the parts. Soak parts for 5 minutes (15 - 20 minutes for heavily scaled parts). Rinse all components with clean water.
Step 11 Use 1/2 of the sanitizer/water solution to sanitize all food zone 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 • Base (area above water trough) • Evaporator plastic parts - including top, bottom and sides • Bin or dispenser Do not rinse the sanitized areas. Step 12 Replace all removed components. Step 13 Wait 20 minutes.
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. Model I0300/I0320/I0520 I0450/I0500/I0600 I0850/I1000/I1200 I1400/I1800 Amount of Sanitizer 3 ounces (90 ml) 3 ounces (90 ml) 12 ounces (355 ml) Step 16 Select auto ice on, press the checkmark and close and secure the front door.
PARTS REMOVAL FOR CLEANING/SANITIZING. E D A C B Off On / Off Mode [ ! ] 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 water trough • • Depress tabs on right and left side of the water trough. Allow front of water trough to drop as you pull forward to disengage the rear pins. C. Remove the water level probe • • • • 46 Pull the water level probe straight down to disengage.
D. Remove the ice thickness probe • • Compress the hinge pin on the top of the ice thickness probe. Pivot the ice thickness probe to disengage one pin then the other. The ice thickness probe can be cleaned at this point without complete removal. If complete removal is desired, disconnect the ice thickness control wiring from the control board. E. Remove the water distribution tube NOTE: Distribution tube thumbscrews are retained to prevent loss.
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 while disassembling and cleaning water circuit components (soak probes for 10 minutes or longer). 3. Clean all probe surfaces including all plastic parts (do not use abrasives). Verify all surfaces are clean.
Water Inlet Valve The water inlet valve normally does not require removal for cleaning. Refer to “Water System Checklist” page 132, 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. When the ice machine is on, the water inlet valve must allow the proper water flow through it. Press the Power button to energize the ice machine. Watch for water flow into the ice machine.
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. Press the power button and stop ice making. 3. While the ice machine is in the freeze mode, check the water trough to determine if the dump valve is leaking. If there is no or little water in the water trough (during the freeze cycle) the dump valve is leaking. A. If the dump valve is leaking, remove, disassemble and clean it. B.
NOTE: During cleaning, do not stretch or damage the spring. 1. Remove the tubing from the dump valve by twisting the clamps off. 2. Remove the valve body, twist off.
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 32°F (0°C) or below. ! Caution If water is allowed to remain in the ice machine in freezing temperatures, severe damage to some components could result. Damage of this nature is not covered by the warranty. Follow the applicable procedure below. AIR-COOLED ICE MACHINES 1. Press the power button. 2.
WATER-COOLED ICE MACHINES 1. Perform steps 1-6 under “Self-Contained AirCooled Ice Machines.” 2. Disconnect the incoming water and drain line from the water-cooled condenser. 3. Energize the ice machine in the freeze cycle. The increasing refrigerant pressure will open the water regulating valve. 4. Blow compressed air through the condenser until no water remains.
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Power Button Cleaning Button Manitowoc LCD Display Navigation Arrows Menu Button Checkmark Operation Control Panel Features The control panel offers a series of pressure sensitive buttons and a four-line interactive display panel. BUTTONS Power Button: Powers the ice machine when in the On/Off Mode. The ice machine can also be programmed to automatically power on and off in two Energy Saver modes. Cleaning Button: Initiates a cleaning cycle. Refer to the Maintenance section for details.
Menu Button: Moves the display from the Home 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. Left and Right Arrows: The Left arrow moves the display to the previous screen, allowing the user to “back out” of programming. Both the Left and Right arrows will move the cursor (underline) within a line of settings.
Menu Navigation Overview Menu Navigation Overview Clean Button AuCS Timer Initiated Clean Function AuCS Clean Function On/Off Button Press Left Arrow From Main Menu Home Screen When Alert Present When Message Present Alerts Menu Messages Menu Menu Button Main Menu Function (Optional) Password Entry Machine Info 90/70 cap Model # IMH Serial # Cond Serial # Warranty -Machine -Evaporator -Compressor Install Date Manuf Date Main SW Ver Disply SW Ver Set-Up Language Time & Date Time Config Units
Display Panel Navigation [Language Time & Date Time Config Units >]▼ > > > ▼ Highlights: Brackets indicate if a line on the screen is “highlighted” or actionable. Move the brackets from line to line using the Down or Up arrow. Move the brackets down from the fourth line to view more of the menu displayed. Arrows: Two kinds of arrows give cues to additional information. “>” symbols show that another screen is available by pressing Checkmark while a line is highlighted.
Cursor: A cursor (underline) is used within lines 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. Exit and re-enter the screen to start again at the top.
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. Off On / Off Mode [ ! ] For example, if alerts are appearing in the fourth line of the display: 1. Press the Left arrow. A list of alerts will appear in the display. 2. Choose the alert you wish to address by moving the highlight brackets with the Down arrow. 3. Press Checkmark again.
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.
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. Use the Down arrow to highlight an item and use the Checkmark to view the information. Press the Left arrow to return to previous screens.
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. 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 highlight Password ON and press the Right arrow. 4.
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. 4. Using the Up & Down arrows, enter the first digit of the factory password in the flashing icon. 5. Press the right arrow to move to the next cell and use the Up & Down arrows to add the number 2. Repeat this process to add 3 & 4. 6.
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. Press the Checkmark button two times to reset the ice machine. The display will return to the SetUp menu and the defaults listed below will be in effect. Refer to Setup to adjust settings.
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. 2. Press the Checkmark. You can choose to view the display in a language other than English, by highlighting your choice and pressing the Checkmark. Selecting one language will deselect the others. 3.
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. 6. When the correct month appears, use the Right arrow to move the blinking cursor to day. 7. Using the Up or Down arrow, adjust the day, if necessary. 8. When the correct day appears, use the Right arrow to move the blinking cursor to year. 9.
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. 3. You can also choose whether the time will be displayed as 12 Hour or 24 Hour by highlighting your choice and pressing the Checkmark. Selecting one will deselect the other. 4.
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. A water filter is recommended to produce the highest quality ice while maintaining the least expensive mode of operation. 1. From the Set-Up menu, use the Down arrow to highlight Ice Clarity. 2.
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. EDIT PASSWORD The password can be changed on this screen 1. From the Set-Up menu, use the Down arrow to highlight Edit Password. 2. Press the Checkmark and confirm current password. 3.
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. Selecting one will deselect the other. 3. You can also choose the time interval from this screen by highlighting Set Interval and pressing the Checkmark. 4.
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. 3. After making your selection, press the Left arrow to return to the previous screen. 4.
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 89 for full specification and formatting details. FACTORY DEFAULTS The entire setup can be reset to the factory defaults. 1. From the Set-Up menu, use the Down arrow to highlight Fact Deflts. 2.
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.
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. 1. In the Energy Saver menu, ensure that Ice Program is highlighted. 2. Press the Checkmark.
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. Press the Checkmark. On this screen, you can choose to turn the Water Miser ON or OFF by highlighting your choice and pressing the Checkmark. Selecting one will deselect the other.
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.
Part Number STH025 02/12 Current Day Current Day Current Day Current Day Current Day Current Day Lifetime Data History -1 -2 -3 -4 -5 Time & Temp Inputs Outputs Real Time Data Control Board Temp Sensors Input Diagnostics USB Stick Manual Setup USB Setup Harvest Started Download Firm Download Conf Export ALL Export Setup USB Setup Repl Cnt Bd Manual Harvest Service Clear View Event Log
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).
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).
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 • AuCS Relay Off/On • LuminIce Off/On • Exit Part Number STH025 02/12 83
DIAGNOSTICS Press the Checkmark with Diagnostics highlighted to enter screens where you can run diagnostics on the control board, sensors and switches.
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.
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. For more information on event codes, see “Service Menu”. Use the Left arrow to return to the Event Log menu.
EVENT LOG Refer to the following table for Event Code descriptions.
Event Log Detail Detail Event Log Service Definition E-Log Display Text E01 Long Freeze Error Description Long Freeze Definition 6 consecutive 60 Minute Freeze cycles = shut down and flash the SL#1 light on board E02 Long Harvest Long Harvest 3 consecutive - 3.5 Minute Harvests logs SL#2 in memory, but runs until 500 long harvest cycles occur.
Part Number STH025 02/12 Detail Event Log Service Definition E-Log Display Text Error Description Definition E11 Refig Fault Refrigeration System (Refrig Fault) The compressor discharge temperature did not increase by at least 10 F, and the evaporator temperature did not decreased by at least 10 F - Measured from Refrigeration Start up to Two Minutes into the Freeze cycle.
Detail Event Log Service Definition E-Log Display Text Error Description Definition Part Number STH025 02/12 E21 T1 Fault T1 Sensor E22 T2 Fault T2 Sensor E23 T3 Fault T3 Sensor E24 T4 Fault T4 Sensor E25 Bin Prb Fault Bin Low Sens E26 Bin Prb Fault Bin Med Sens E27 Bin Prb Fault Bin Hi Sens E28 AUCS AUCS (Aucs not Present) (Event Log only - No alarm) E29 USB COMM USB Comm (Event Log only - No Alarm) Engineering purposes Only E30 USB DNLD USB download error (dlnd) Event
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. USB Flash Drive Specifications: • USB 2 Version • 2 GB or less capacity • Fat32 File System • 512 MB File Allocation Unit USB Flash Drive Formatting: Procedure to format a USB flash drive varies with operating system software.
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: • Left click on the Windows Start Button • Left click on “Run” • Type compmgmt.msc and left click on “OK” • Left click on “Disk Management”. 3. Verify USB flash drive capacity is 2 GB or less 4.
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 89 USB Flash Drive Specifications and Formatting. 1. Drag and drop the files from your email onto a flash drive or refer to Exporting data to a flash drive to transfer settings to multiple machines. 2. Ensure that the ice machine’s power is on. 3.
Bin Switches Bin Thermostat USB Display Light Micro Light Clean Light Harvest Light SL-1 Light SL-2 Light Thermistors T1 T2 Dump Valve T3 T4 USB Connector Left Bin Switch Light Transformer Right Bin Switch Light Water Level Probe Light Display Ice Thickness Probe Light RS485 RT Harvest Bin LED LuminIce Battery Compressor LT Harvest Water Level Probe Fuse Relay Lights Pump Control Board 10. Follow the on-screen instructions: A.
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. The data files are small and can be attached to an email.
SAFE OPERATION MODE Allows the ice machine to operate up to 72 hours if the ice thickness probe (E19 fault) and/or water level probe sensors fail (E20 fault). • When the control board starts the safe mode an alert is flashed on the LCD display to notify the end-user they have a production problem. • The control board automatically initiates and monitors the safe mode. The control will automatically exit the safe mode if a normal signal is received from the input.
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 • after a prolonged out of service period • after cleaning and sanitizing NOTE: Routine adjustments and maintenance procedures are not covered by the warranty.
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 1/8" (3 mm). NOTE: Make sure the water curtain is in place when performing this check. It prevents water from splashing out of the water trough. 1. Inspect the bridge connecting the cubes. It should be about 1/8" (3 mm) thick. 2.
Sequence of Operation SELF CONTAINED AIR OR WATER COOLED NOTE: The power button must be depressed 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. Water Purge Before the refrigerant compressor starts, the water pump and water dump solenoid energize to purge the ice machine of old water. This feature ensures that the ice making cycle starts with fresh water. 2.
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. After water contacts the water level probe the water fill valve de-energizes. The control board will automatically cycle the water fill valve within the 6 minute water fill time limit.
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. The ice machine remains off for 3 minutes before it can automatically restart.
Single Evaporator Self Contained Air & Water-Cooled Models Energized Parts Chart Ice Making Sequence of Operation Water Pump Harvest Valve(s) Air Pump(s)* Water Inlet Valve Water Dump Valve Contactor Coil Compressor Condenser Fan Motor Length of Time On Off Off Off On Off Off Off 45 Seconds Off On On Off Off Off Off Off 5 Seconds Off On On Off Off On On On 5 Seconds Off On On May Cycle Initial Start-Up is 60 Seconds Start-Up 1. Water Purge 2.
Part Number STH025 02/12 Single Evaporator Self Contained Air & Water-Cooled Models Energized Parts Chart (Continued) Ice Making Sequence of Operation Water Pump Harvest Valve(s) Air Pump(s)* Water Inlet Valve Water Dump Valve Contactor Coil Compressor On On On Off On On On 6. Harvest Off On On Off Off On On 7. Automatic Shut-Off Off Off Off Off Off Off Off Harvest Sequence 5.
REMOTE CONDENSER Single Evaporator Models NOTE: The power button must be depressed 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. Water Purge Before the compressor starts, the water pump and water dump solenoid are energized for 45 seconds, to completely purge the ice machine of old water. This feature ensures that the ice making cycle starts with fresh water. 2.
Harvest Sequence 5. Water Purge The air pump (when used) the harvest valve(s) and harvest pressure regulating valve (HPR) open at the beginning of the water purge to divert hot refrigerant gas to the evaporator. The water pump continues to run, and the water dump valve energizes to purge the water in the water trough. 6.
Single Evaporator Remote Air-Cooled Condenser Models Energized Parts Chart Ice Making Sequence of Operation Water Pump Harvest Valve (Left) HPR Valve Harvest Valve (Right) (When Used) Air Pump (When Used) Water Inlet Valve Water Dump Valve Contactor Coil Liquid Line Solenoid Compressor Condenser Fan Motor Length of Time On Off Off Off Off On Off Off Off 45 Seconds Off On On On Off Off Off Off Off 5 Seconds Off On On On Off Off On On On 5 Seconds Off May Cycle O
Part Number STH025 02/12 Single Evaporator Remote Air-Cooled Condenser Models Energized Parts Chart (Continued) Water Pump Harvest Valve (Left) HPR Valve Harvest Valve (Right) (When Used) Air Pump (When Used) Water Inlet Valve Water Dump Valve Contactor Coil Liquid Line Solenoid Compressor Condenser Fan Motor Length of Time On On On On Off On On On On Factory Set at 45 Seconds 6. Harvest Off On On On Off Off On On On Bin Switch Activation 7.
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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. • Safety Limit 1 all models - If the freeze time reaches 60 minutes, the control board automatically initiates a harvest cycle.
ANALYZING WHY A SAFETY LIMIT STOPPED THE ICE MACHINE Safety limits are designed to stop the ice machine prior to major component failures, most often a minor problem or something external to the ice machine. This may be difficult to diagnose, as many external problems occur intermittently. Example: An ice machine stops intermittently on safety limit #1 (long freeze times). The problem could be a low ambient temperature at night, a water pressure drop, the water is turned off one night a week, etc.
SAFETY LIMIT #1 Freeze time exceeds 60 minutes for 6 consecutive freeze cycles. Possible cause list Water System • Dirty/defective water level probe • Low water pressure (20 psig min.) • High water pressure (80 psig max.) • High water temperature (90°F/32.2°C max.
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 131 Water System • Water area (evaporator) dirty • Dirty/defective water dump valve • Vent tube not installed on water outlet drain • Water freezing behind evaporator • Plastic extrusions and gaskets not securely mounted to the evaporator • Low water pressure (20 psig min.
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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. Remote condenser, and self contained models use separate charts.
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. B. Write down any customer settings so they can be re-entered when diagnostics are complete. This procedure also resets the password to the factory default. The default factory password is 1234.
Part Number STH025 02/12 SYMPTOM #1 ICE MACHINE WILL NOT RUN Start Are there any lights on or flashing on the control board? No Line voltage at wires 55 & 56 on 9 pin control board connector? No Supply power to the ice machine Yes Control board fuse is good? Yes Yes Refer to display & control board diagnostics No Replace fuse & determine which component caused fuse to blow 117
Yes Display light flashing heartbeat? No Yes No Part Number STH025 02/12 Bin switch light on? (Multi evap all lights on?) Refer to display & control board diagnostics All water curtains or dampers in place? No Install the water curtain/damper. No Replace the water curtain/damper.
Part Number STH025 02/12 Yes Press power button to start ice making, does safety limit light flash? No Ice machine starts? No Yes Yes SL1 Which light flashes? SL2 Refer to Safety Limit #1 long freeze cycle Refer to Safety Limit #2 long harvest cycle Refer to display & control board diagnostics Test run ice machine 119
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. Verify primary voltage is supplied to ice machine and the fuse/circuit breaker is closed. 2. Verify the high pressure cutout is closed. 3. Verify control board fuse is okay.
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SYMPTOM #2 - SELF-CONTAINED AIR, WATER & REMOTE CONDENSER MODELS Symptom #2 Low Production, Long Freeze Ice Machine has a Long Freeze Cycle.
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” causing a good refrigerant component to appear bad. Correct problems as they are found. If the operational problem is found, it is not necessary to complete the remaining procedures.
Part Number STH025 02/12 SYMPTOM #2 - FREEZE CYCLE REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES SINGLE EXPANSION VALVE SELF CONTAINED AIR, WATER & REMOTE CONDENSER Operational Analysis Ice Production Installation and Water System Ice Formation Pattern 125 Freeze Cycle Discharge Pressure _______ ______ ______ 1 minute Middle End into cycle 1 2 3 4 Air-Temperature Entering Condenser_____________ Water Temperature Entering Ice Machine_________ Published 24 hour ice production________________ Calcu
SINGLE EXPANSION VALVE SELF CONTAINED AIR, WATER & REMOTE CONDENSER Operational Analysis 1 2 3 4 If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist Freeze Cycle page 138 to eliminate problems and/or components not listed on this table before proceeding.
Part Number STH025 02/12 SINGLE EXPANSION VALVE SELF CONTAINED AIR, WATER & REMOTE CONDENSER Operational Analysis 1 2 3 4 Wait 5 minutes into the freeze cycle. Compare temperatures of compressor discharge line and harvest valve inlet. The harvest valve inlet is Hot -andapproaches the temperature of a Hot compressor discharge line. The harvest valve inlet is Cool enough to hold hand on -andthe compressor discharge line is Hot.
Before Beginning Service Ice machines may experience operational problems only during certain times of the day or night. A machine may function properly while it is being serviced, but malfunctions later. Information provided by the user can help the technician start in the right direction, and may be a determining factor in the final diagnosis. Ask these questions before beginning service: • When does the ice machine malfunction? (night, day, all the time, only during the Freeze cycle, etc.
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. 1. Determine the ice machine operating conditions: Air temp entering condenser:____° Air temp around ice machine:____° Water temp entering sump trough:____° 2.
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. If they match closely, determine if: • Another ice machine is required. • More storage capacity is required.
Installation/Visual Inspection Checklist Inadequate Clearances • Check all clearances on sides, back and top.
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).
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. Any number of problems can cause improper ice formation.
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. Or, the ice at the outlet of the evaporator reaches 1/8 in. to initiate a harvest, but the inlet of the evaporator already has 1/2 in. to 1 in. of ice formation. 3.
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 225) for ice machine being checked. Use the operating conditions determined in step 1 to find the published normal discharge pressures. Freeze Cycle______ Harvest Cycle______ 3. Perform an actual discharge pressure check.
FREEZE CYCLE DISCHARGE PRESSURE HIGH CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 131) Air Condenser • Dirty condenser filter • Dirty condenser fins • High inlet air temperature • Condenser discharge air recirculation • Defective fan cycling control (page 185) • Defective fan motor • Defective head pressure control valve {Remote} Water Condenser • Low water pressure [20 psig (138 kPa) min.] • High inlet water temperature (90°F/32°C max.
FREEZE CYCLE DISCHARGE PRESSURE LOW CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 131) Air Cooled Condensers • Defective head pressure control valve, won’t bypass (page 198) • Defective fan cycle control, stuck closed (page 185) Water Cooled Condensers • Water Regulating Valve out of adjustment • Water Regulating Valve Defective Other • Undercharged • Wrong type of refrigerant • Non-Manitowoc components in system • Liquid line/component restricted Part Number S
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. NOTE: Analyze discharge pressure before analyzing suction pressure.
Suction Pressure High Checklist Improper Installation • Refer to “Installation/Visual Inspection Checklist” page 131 Discharge Pressure • Discharge pressure is too high and is affecting suction pressure – refer to “Freeze Cycle Discharge Pressure High Checklist” (page 136) Improper Refrigerant Charge • Overcharged (also see “Freeze Cycle Discharge Pressure High Checklist” page 136) • Wrong type of refrigerant • Non condensable in system Components • Harvest valve leaking - continue the table • Harvest press
SUCTION PRESSURE LOW CHECKLIST Improper Installation • Refer to “Installation/Visual Inspection Checklist” (page 131) Discharge Pressure • Discharge pressure is too low and is affecting low side – refer to “Freeze Cycle Discharge Pressure Low Checklist” (page 137) Improper Refrigerant Charge • Undercharged • Wrong type of refrigerant Other • Non-Manitowoc components in system • Improper water supply over evaporator – refer to “Water System Checklist” (page 132) • Restricted/plugged liquid line drier • Restr
Self-contained & Remote Condenser Single Expansion Valve 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.
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. Use the following procedures to determine if a harvest valve is remaining partially open during the freeze cycle. SELF-CONTAINED OR REMOTE CONDENSER MODELS HARVEST VALVE ANALYSIS 1.
Findings Comments The inlet of the harvest valve is cool enough to touch and the compressor discharge line is hot. This is normal as the discharge line should always be too hot to touch and the harvest valve inlet, although too hot to touch during harvest, should be cool enough to touch after 5 minutes into the freeze cycle. Cool & Hot The inlet of the harvest valve is hot and approaches the temperature of a hot compressor discharge line.
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. Higher ambient air temperatures at the condenser and/or higher inlet water temperature = higher discharge line temperatures at the compressor.
Water Regulating Valve Problem (Freeze Cycle) Valve not maintaining discharge pressure. • Valve incorrectly set, dirty or defective. Adjust valve to correct discharge pressure for your model (refer to cycle times/24 hour productions charts), clean or replace valve. Discharge pressure extremely high; Liquid line entering receiver feels hot. • Water regulating valve incorrectly set or not opening. Verify Head Pressure Control Valve operation before changing water regulating valve.
Final Analysis - Self-contained Air, Water & Remote Condenser Models 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 pressures, not the harvest cycle pressures. A low refrigerant charge normally affects both pressures. Verify the ice machine is not low on charge before replacing an expansion valve. 1.
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. To receive warranty credit, the compressor ports must be properly sealed by crimping and soldering them closed.
SYMPTOM #3 HARVEST PROBLEMS SELF-CONTAINED AIR, WATER & REMOTE CONDENSER MODELS Normal Ice Cube Melted Out 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. Harvest problems can be split into two categorizes. • • 148 Melted sheet of cubes at the end of the harvest cycle. Ice can be removed rather easily by hand. The back of the cubes are misshapen and melted.
Part Number STH025 02/12 SYMPTOM #3 SELF-CONTAINED AIR OR WATER-COOLED Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Not Melted After Harvest START Low production, Normal fill pattern, long harvest cycle, Possible SL #2, Back of cubes are not melted YES Discharge line temperature is normal at the end of the freeze cycle? NO Refer to Symptom #2 Freeze Cycle Operational Analysis Table YES Is harvest valve energized? Refer to Sequence of Operation & Wiring Diagrams NO YES N
Self Contained Air-cooled Condenser? YES Fan cycling control operates correctly in freeze cycle? NO YES Replace Fan Cycling Control Fan cycling control opens below setpoint in harvest cycle? NO NO YES Are you sure Discharge line temperature is normal? Repeat this flowchart & verify all data Part Number STH025 02/12 Self Contained Water-cooled Condenser? YES NO Traditional Remote Air-cooled Condenser? Maintains correct pressure in freeze cycle? NO YES Refer to Symptom #3 Traditional Re
Part Number STH025 02/12 SYMPTOM #3 - REMOTE CONDENSER Traditional Remote Ice Machine - Long Harvest/Low Production/Intermittent Safety Limit 2 START Fails at night or in low ambient - Operates normally above 70F/21C Normal ice fill, long harvest cycle, possible SL #2, back of cubes are not melted at the end of harvest cycle NO YES YES Wet condenser with water during freeze cycle Liquid Line Temperature Warm (body temperature) Discharge line temperature is normal at the end of the freeze cycle? All R
YES NO Is harvest valve energized? YES Is head pressure high & suction pressure low in harvest? YES Replace Harvest Valve Refer to Sequence of Operation & Wiring Diagrams NO Is head pressure low & suction pressure low in harvest? YES Part Number STH025 02/12 Refer to Harvest Pressure Regulating Valve Diagnostics NO Refer to Symptom #4 Will Not Harvest, Freeze Cycle Normal & Ice Cubes are Melted Flowchart YES Is head pressure normal & suction pressure normal in harvest? NO Repeat this fl
Part Number STH025 02/12 SYMPTOM #4 SELF-CONTAINED AIR, WATER-COOLED OR REMOTE Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Melted After Harvest START Are back of the cubes melted at end of harvest cycle? NO YES NO Level Ice Machine YES NO Does ice remain frozen to the evaporator at the end of the harvest cycle? Is Ice Machine level? YES Refer to Symptom #2 Freeze Cycle Operational Analysis Table Is water flowing over the evaporator in the first 45 seconds of harvest?
NO Is the evaporator dirty? (Dry evaporator first then check) YES NO Part Number STH025 02/12 Discharge line temperature is normal at the end of the freeze cycle? YES NO Refer to Heavily Scaled Cleaning Procedure Refer to Symptom #2 Freeze Cycle Operational Analysis Table Refer to Manual Cleaning Procedure
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Component Check Procedures Electrical Components CONTROL BOARD, DISPLAY BOARD AND TOUCH PAD 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” and “Micro” lights will flash like a heartbeat. The two green lights are located on the top right corner of the control board. Display Diagnostics 1. Micro light flashes and display light is off. 2.
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. Micro light is off - Replace control board. 3. Perform the following keystrokes on the display.
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. Test the functionality of all buttons on the touch pad. NOTE: Pushing the power button will start and stop the ice machine. Testing it last will allow the ice machine to continue running a freeze cycle.
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. 1. Press power button to turn off ice machine. 2. Perform the following keystrokes on the display.
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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. USB Flash Drive Specifications: • USB 2 Version • 2 GB or less capacity • Fat32 File System • 512 MB File Allocation Unit USB Flash Drive Formatting: Procedure to format a USB flash drive varies with operating system software.
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: • Left click on the Windows Start Button • Left click on “Run” • Type compmgmt.msc and left click on “OK” • Left click on “Disk Management”. 3. Verify USB flash drive capacity is 2 GB or less 4.
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 161 and prepare the flash drive. 2. Drag and drop the firmware file onto a flash drive or refer to Exporting data to a flash drive to transfer settings to multiple machines. 3. Ensure that the ice machine’s power is on. 4. Press the Menu button. 5.
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. 12. SUCCESS will appear on the display.
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. The data files are small and can be attached to an email. Important Do not use a flash drive with a built-in software program, such as Sandisk brand. 1. 2. 3. 4.
8. Highlight Export ALL or Export Setup, depending on your requirements, and press the Checkmark. A display of instructions will appear. 9. 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 download to complete. D. Export Complete will appear on the display.
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. The asset data is transferred to the replacement control board from the faulty control board.
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. If you need to navigate to the control board screen: 1. Press the Menu button. 2. Press the Down arrow until Service is highlighted, then press the Checkmark. 3.
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. CHECK PROCEDURE 1. If the bin switch light is on with the water curtain/ ice dampers closed, the fuse is good.
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. 2. Automatic ice machine shut-off. If the storage bin is full at the end of a Harvest cycle, the sheet of cubes fails to clear the water curtain/ice dampers and holds it open.
Diagnostics SYMPTOMS Bin Switch Fails Open • The ice machine will not start an ice making cycle and the display indicates “Curtain Open”. • The ice machine will run in the clean cycle. Bin Switch Fails Closed • When running a “Long Harvest” alert is displayed and safety limit 2 indicated. • May be off on a safety limit 2. • The harvest cycle continues after ice opens and closes the ice damper (harvest cycle is 3.5 minutes). DIAGNOSTICS • • • • 1. Verify bin switch, damper and damper magnet are in place.
3. Disconnect bin switch wire from control board. 4. Jumper control board bin switch wire to ground, press the power button and observe the display and control board lights. A. Curtain switch closes, control board light energizes and ice machine starts - Replace bin switch B. Curtain switch remains open and control board light is off - Verify procedure was correctly followed - Replace control board.
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. Factory default settings measure resistance from both long probes to the short probe.
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. • The water inlet valve turns OFF after water contacts the water level probes for 3 continuous seconds.
• No is displayed - Control board is not receiving a sensing water signal. Continue with step 5. • Yes is displayed - Control board is receiving a sensing water signal. Clean the water level probe and test run. Step 5 Start a new freeze cycle by pressing the power button. Step 6 Wait until the pre-chill cycle begins, then jumper water level probe connection #2 & #3 at the control board. A. Water level light energizes and water flow stops - Repair wire or replace water level probe. B.
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. Proceed to step 3. B. No is displayed - Control board is not receiving a sensing water signal. Proceed to Control Board Diagnostics page 158. Step 3 Disconnect water level probe, observe LCD display text. A.
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 time lock-in feature. This prevents the ice machine from short cycling in and out of harvest.
Ice Thickness Check The ice thickness probe is factory-set to maintain the ice bridge thickness at 1/8 in. (32 mm). NOTE: Make sure the water curtain/splash shields are in place when performing this check. It prevents water from splashing out of the water trough. 1. Inspect the bridge connecting the cubes. It should be about 1/8 in. (32 mm) thick. 2.
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 • Large sheet of ice on evaporator • Harvest cycle doesn’t start • Freeze cycles are slower than published cycle times ICE MACHINE CYCLES INTO HARVEST BEFORE ICE CONTACTS THE ICE THICKNESS PROBE 1.
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. 1. Reboot the control board by disconnecting and reconnecting line voltage to the ice machine. 2. Verify ice thickness probe gap is approximately 9/32” (7 mm). 3.
HIGH PRESSURE CUTOUT (HPCO) CONTROL FUNCTION Stops the ice machine if subjected to excessive highside pressure. The HPCO control is normally closed, and opens on a rise in discharge pressure. SPECIFICATIONS. Specifications Cut-Out Cut-In 440 psig ±10 Automatic Reset (3103 kPa ±69 31 bar ±.69) (Must be below 300 psig (2068 kPa 20.68 bar) to reset.) SYMPTOM Opening the HPCO will cause the control board to initiate a 60 minute delay.
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). A. Line voltage present - HPCO switch has reset and closed. B. No line voltage present - HPCO switch is open. Verify pressure - Below cut-in replace HPCO - Above cut-in find root cause problem. 3.
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. 2. If this is a one time event it may be intermittent and caused by conditions around the unit changing. For example: High ambient temperature, water turned off to condenser (water cooled unit) etc. 3. Run the system to see if the control trips at the rated pressure.
FAN CYCLE CONTROL FUNCTION Cycles the fan motor on and off to maintain proper operating discharge pressure. The fan cycle control closes on an increase, and opens on a decrease in discharge pressure. SPECIFICATIONS Specifications Model Cut-In (Close) I0300 / I0320 I0520 / I0450 / I0500 / I0600 I0850 / JC0995 I1000 I1400 / I1800 250 ±5 (1723 kPa ±.34) (17.23 bar ±.34) 275 psig ±5 (1896 kPa ±34) (18.96 bar±.34) Cut-Out (Open) 200 ±5 (1517 kPa ±.34) (15.17 bar ±.34) 225 psig ±5 (1551 kPa ±34) (15.51 bar ±.
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 -30° - -20° -22° - -4° K Ohms (x 1000) 820.85 - 466.35 -20° - -10° -4° - 14° 466.35 - 269.05 -10° - 0° 14° - 32° 269.05 - 160.70 0° - 10° 32° - 50° 160.70 - 98.930 10° - 20° 50° - 68° 98.930 - 62.015 20° - 30° 68° - 86° 62.015 - 39.
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. T1 - Remote Condenser or Remote Condensing Unit Models • Liquid line temperature sensor located at the inlet of the receiver. T2 - Air or Water cooled Models • Discharge line temperature sensor located near the compressor.
C [2] [5] T4 T4 C [1] T3 T4 T4 T4 T4 T4 N [48 48] N [1] T3 T3 W [1] A& W [48 48] T3 Co n d e n s i n g O p t io n A [1] R404a Ent Evap [Evap In] [Left] R404a Lvg Evap [Evap Out] T3 T3 T3 [Right] R404a Lvg Evap [Evap Out] T2 T2 T2 T2 T2 Compressor or Discharge T1 T1 T1 R404a Lvg Condenser [Liquid Line] T1 T1 T1 T1 R404a Ent Receiver Temperature Sensing Universal Location T2 T2 R404a Lvg Receiver [DipTu Tube] Spl plit System Remote Condensing Unit: Coo Un ool Vap
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 Scroll down to Temp Sensors and press right arrow to display thermistor temperature readings. NOTE: An open thermistor will display -22°F (-30°C) and a shorted thermistor displays 475°F (246°C). Thermistor Test 1.
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. 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. 2.
COMPRESSOR ELECTRICAL DIAGNOSTICS The compressor does not start or will trip repeatedly on overload. Check Resistance (Ohm) Values NOTE: Compressor windings can have very low ohm 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. SINGLE PHASE COMPRESSORS 1.
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. The two likely causes of this are a defective starting component and a mechanically seized compressor.
DIAGNOSING START COMPONENTS If the compressor attempts to start, or hums and trips the overload protector, check the start components before replacing the compressor. Capacitor Visual evidence of capacitor failure can include a bulged terminal end or a ruptured membrane. Do not assume a capacitor is good if no visual evidence is present. A good test is to install a known good substitute capacitor. Use a capacitor tester when checking a suspect capacitor.
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. The contacts remain open until the compressor is de-energized. RELAY OPERATION CHECK 1. Disconnect wires from relay terminals. 2. Verify the contacts are closed.
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.
PTCR Operation Check 1. Visually inspect the PTCR. Check for signs of physical damage. NOTE: The PTCR case temperature may reach 210°F (100°C) while the compressor is running. This is normal. Do not change a PTCR just because it is hot. 2. Wait at least 10 minutes for the PTCR to cool to room temperature. 3. Remove the PTCR from the ice machine. 4. Measure the resistance of the PTCR as shown. The resistance reading must be between: • Two Terminal PTCR =18 to 40 ohms • Three Terminal PTCR = 8 to 22 ohms.
This Page Intentionally Left Blank Part Number STH025 02/12 197
Refrigeration Components 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. Refrigerant Charge Verification The correct amount of refrigerant (name plate charge) is required to operate correctly at all ambient conditions.
Freeze Cycle Operation All Models 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. At temperatures below this (or at higher temperatures if it is raining), the head pressure control dome’s nitrogen charge closes the condenser port and opens the bypass port from the compressor discharge line.
NOTE: A head pressure control valve that will not 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. Lower ambient conditions can be simulated by rinsing the condenser with cool water during the freeze cycle.
Harvest Cycle REMOTE CONDENSER The head pressure control cycles into full bypass due to the pressure drop when the harvest valve opens. Refrigerant flows from the compressor to the evaporator through the harvest valve and the head pressure valve is out of the circuit. Undercharge Symptoms • Safety limit #1 or Safety limit #2 in control board memory. • Harvest cycle suction pressure is low. • Harvest cycle discharge pressure is low. • Liquid line entering receiver feels warm to hot in the freeze cycle.
HARVEST PRESSURE REGULATING (HPR) SYSTEM REMOTE CONDENSER ONLY GENERAL The harvest pressure regulating (HPR) system includes: • Harvest pressure regulating solenoid valve (HPR solenoid). This is an electrically operated valve which opens when energized, and closes when de-energized. INLET OUTLET FLOW HPR SOLENOID • Harvest pressure regulating valve (HPR valve). This is a pressure regulating valve which modulates open and closed, based on the refrigerant pressure at the outlet of the valve.
FREEZE CYCLE The HPR system is not used during the freeze cycle. The HPR solenoid is closed (de-energized), preventing refrigerant flow into the HPR valve. HARVEST CYCLE During the harvest cycle, the check valve in the discharge line prevents refrigerant in the remote condenser and receiver from back feeding into the evaporator and condensing to liquid. The HPR solenoid is opened (energized) during the harvest cycle, allowing refrigerant gas from the top of the receiver to flow into the HPR valve.
3. Freeze time normal? (Refer to Cycle Times/Refrigerant Pressures/24 Hour Ice Production Charts page 225) Shorter freeze cycles - Refer to head pressure control valve diagnostics page 198. Longer freeze cycles - Refer to water system checklist page 132, then refer to Refrigeration Diagnostic Procedures. 4.
WATER REGULATING VALVE Water-Cooled Models Only FUNCTION The water regulating valve maintains the freeze cycle discharge pressure. CHECK PROCEDURE 1. Determine if the head pressure is high or low (refer to cycle time/24 hour ice production and operational pressure chart for the model you are servicing). 2. Verify the condenser water meets specifications. 3. Adjust valve to increase or decrease discharge pressure. 4. Determine the temperature of the liquid line entering the receiver by feeling it.
Refrigerant Recovery/Evacuation SELF-CONTAINED MODEL PROCEDURE 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 of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company. Important Replace the liquid line drier after recovering the refrigerant and before evacuating and recharging.
Self-Contained Recovery/Evacuation 1. Press the power button and cycle the ice machine off. 2. Install manifold gauges, scale and recovery unit or two-stage vacuum pump and open high and low side on manifold gauges. MANIFOLD SET OPEN LOW SIDE ACCESS VALVE OPEN HIGH SIDE ACCESS VALVE VACUUM PUMP/ RECOVERY UNIT OPEN CLOSED RECOVERY/EVACUATION CONNECTIONS 3. Perform recovery or evacuation: A. Recovery: Operate the recovery unit as directed by the manufacturer’s instructions. B.
Self-Contained Charging Procedures Important The charge is critical on all Manitowoc ice machines. Use a scale to ensure the proper charge is installed. 1. Be sure the ice machine is off.
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. 4. Open the charging cylinder and add the proper refrigerant charge (shown on nameplate) through the discharge service valve. 5. Let the system “settle” for 2 to 3 minutes. 6. Close the high side on the manifold gauge set. 7. Press the power button. 8. Add any remaining vapor charge through the suction service valve (if necessary).
REMOTE CONDENSER MODEL PROCEDURE Refrigerant Recovery/Evacuation Do not purge refrigerant to the atmosphere. Capture refrigerant using recovery equipment. Follow the manufacturer’s recommendations. Important Manitowoc Ice assumes no responsibility for the use of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company. Important Replace the liquid line drier after recovering the refrigerant and before evacuating and recharging.
CONNECTIONS Important Recovery/evacuation of a remote system requires connections at four points for complete system evacuation. Make these connections: • Suction side of the compressor through the suction service valve. • Discharge side of the compressor through the discharge service valve. • Receiver outlet service valve, which evacuates the area between the check valve in the liquid line and the pump down solenoid.
REMOTE CONDENSER RECOVERY/EVACUATION 1. Press the power button to stop the ice machine. 2. Install manifold gauges, scale and recovery unit or two-stage vacuum pump. 3. Open high and low side on the manifold gauge set. 4. Perform recovery or evacuation: A. Recovery: Operate the recovery unit as directed by the manufacturer’s instructions. B. Evacuation prior to recharging: Pull the system down to 500 microns. Then, allow the pump to run for an additional hour.
ACCESS REMOTE RECOVERY/EVACUATION CONNECTIONS Part Number STH025 02/12 213
Remote Charging Procedures 1. Close the vacuum pump valve and the low side manifold gauge valve. 2. 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). 3. If the high side does not take the entire charge, close the high side on the manifold gauge set and start the ice machine. Add the remaining charge through the low side (in vapor form) until the machine is fully charged.
EVAPORATOR HEAT EXCHANGER EXPANSION VALVE SOLENOID VALVE x LOW SIDE ACCESS VALVE STRAINER COMPRESSOR x HARVEST PRESSURE SOLENOID VALVE CHECK VALVE x HARVEST PRESSURE REGULATING VALVE HIGH SIDE ACCESS VALVE LIQUID LINE SOLENOID DISCHARGE LINE QUICK CONNECT SCHRAEDER FITTING DRIER REMOTE CONDENSER RECEIVER ACCESS VALVE B CHECK VALVE R C HEAD PRESSURE CONTROL VALVE MANIFOLD SET TEE CLOSED OPEN CLOSED SCALE VACUUM PUMP/ RECOVERY UNIT OPEN REMOTE CHARGING CONNECTIONS Part Number STH02
System Contamination Clean-Up General This section describes the basic requirements for restoring contaminated systems to reliable service. Important Manitowoc Ice assumes no responsibility for the use of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company. DETERMINING SEVERITY OF CONTAMINATION System contamination is generally caused by either moisture or residue from compressor burnout entering the refrigeration system.
Contamination Cleanup Chart Symptoms/Findings No symptoms or suspicion of contamination Moisture/Air Contamination symptoms Refrigeration system open to atmosphere for longer than 15 minutes Refrigeration test kit and/or acid oil test shows contamination Leak in water cooled condenser No burnout deposits in open compressor lines Mild Compressor Burnout symptoms Oil appears clean but smells acrid Refrigeration test kit or acid oil test shows harmful acid content No burnout deposits in open compressor lines S
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. NOTE: If the contamination is from moisture, use heat lamps during evacuation. Position them at the compressor, condenser and evaporator prior to evacuation. Do not position heat lamps too close to plastic components, or they may melt or warp. Important Dry nitrogen is recommended for this procedure. This will prevent CFC release. 4.
Severe System Contamination 1. Remove the refrigerant charge. 2. Remove the compressor and inspect the refrigeration lines. If burnout deposits are found, install a new harvest valve, replace the manifold strainer, TXV and harvest pressure regulating valve. 3. Wipe away any burnout deposits from suction and discharge lines at compressor. 4. Sweep through the open system with dry nitrogen. Important Refrigerant sweeps are not recommended, as they release CFCs into the atmosphere. 5.
Important Dry nitrogen is recommended for this procedure. This will prevent CFC release. 9. 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. Pressurize to a minimum of 5 psig (35 kPa,.35 bar). B. Change the vacuum pump oil. C. Pull vacuum to 500 microns. Break the vacuum with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psig (35 kPa,.35 bar). D.
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) • High pressure cut-out control • Low Pressure cut-out control • High side service valve • Low side service valve Important This is a required in-warranty repair procedure. 1.
Part Number STH025 02/12 USING PINCH-OFF TOOL
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 offthe-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. A Manitowoc filter-drier has high moisture and acid removal capability.
TOTAL SYSTEM REFRIGERANT CHARGE NOTE: All machines listed use R-404A refrigerant - This information is for reference only. Refer to the ice machine serial number tag to verify the system charge. Serial plate information overrides information listed on these pages. Part Number STH025 02/12 Model Air Cooled Water Cooled Remote Additional Refrigerant for Line Sets 51’-100’ Maximum System Charge I0300 15 oz. 12 oz. NA NA NA I0320 20 oz. 18 oz. NA NA NA I0450 20 oz. 14 oz.
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. • Production and cycle times are for dice cube - Half dice cube cycle times can be 2 - 3 minutes faster, depending on model and ambient temperature. • Regular cube production derate is 7%. • Ice production checks that are within 10% of the chart are considered normal.
I0300 SERIES I0300A Self-Contained Air-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 9.6-11.5 10.8-12.9 12.3-14.6 80/27 10.6-12.6 12.3-14.6 13.5-16.0 90/32 11.8-14.0 13.9-16.4 15.0-17.7 100/38 13.2-15.7 14.6-17.3 16.2-19.2 110/43 15.0-17.7 15.8-18.7 17.7-20.9 Water Temperature °F/°C Harvest Time1 1-2.
I0300W Self-Contained Water-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 10.0-11.9 11.1-13.2 12.3-14.6 80/27 10.2-12.2 11.3-13.4 12.3-14.6 90/32 10.4-12.4 11.8-14.0 12.6-15.0 100/38 10.6-12.6 11.8-14.0 12.6-15.7 110/43 10.8-12.9 11.8-14.0 12.9-15.3 Water Temperature °F/°C Harvest Time1 1-2.
I0320 SERIES I0320A Self-Contained Air-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 90/32 70/21 13.1-15.2 15.7-18.2 16.6-19.3 80/27 15.7-18.2 17.3-20.1 18.9-21.9 90/32 18.1-21.0 20.3-23.5 21.3-24.6 100/38 21.3-24.6 23.0-26.6 24.3-28.1 Water Temperature °F/°C Harvest Time1 1-2.
I0320W Self-Contained Water-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Around Ice Machine °F/°C Freeze Time 50/10 70/21 90/32 70/21 13.3-15.5 15.4-17.9 16.6-19.3 80/27 13.8-16.1 16.0-18.6 17.3-20.1 90/32 1.3-16.6 16.6-19.3 18.1-21.0 100/38 14.8-17.2 17.3-20.1 18.9-21.9 110/43 1.4-17.9 18.1-21.0 19.5-22.9 Water Temperature °F/°C Harvest Time1 1-2.
I0450 SERIES I0450A Self-Contained Air-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 10.2-11.9 11.1-12.9 12.1-14.1 Water Temperature °F/°C 80/27 11.4-13.3 12.3-14.3 13.3-15.5 90/32 12.5-14.5 13.8-16.1 14.8-17.2 100/38 13.8-16.1 15.4-17.9 16.6-19.3 110/43 16.3-18.9 17.7-20.5 19.3-22.4 Harvest Time1 1-2.
I0450W Self-Contained Water-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 9.9-11.6 11.1-12.9 12.1-14.1 Water Temperature °F/°C 80/27 10.2-11.9 11.6-13.5 12.5-14.5 90/32 10.3-12.0 12.1-14.1 12.9-15.0 100/38 10.4-12.2 12.5-14.5 13.3-15.5 110/43 10.7-12.5 12.9-15.0 14.3-16.6 Harvest Time1 1-2.
I0500 SERIES I0500A Self-Contained Air-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 11.0-12.6 12.9-14.8 14.3-16.3 80/27 12.4-14.3 14.9-17.0 15.1-17.2 90/32 14.5-16.5 15.5-17.7 17.4-19.9 100/38 16.2-18.5 17.7-20.2 19.9-22.7 110/43 18.6-21.2 20.2-22.1 22.2-25.2 Water Temperature °F/°C Harvest Time1 1-2.
I0500W Self-Contained Water-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 10.5-12.1 13.2-15.1 15.3-17.5 Water Temperature °F/°C 80/27 11.9-13.6 13.7-15.7 15.5-17.7 90/32 12.3-14.1 13.9-15.9 15.7-17.9 100/38 12.6-14.4 14.3-16.3 16.2-18.5 110/43 12.9-14.8 14.5-16.5 16.6-19.0 Harvest Time1 1-2.
I0500N Remote Air-Cooled Condenser Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 90/32 -20/-29 to 70/21 12.3-14.1 12.7-14.7 13.7-15.8 Water Temperature °F/°C 90/32 12.4-14.3 13.9-15.9 14.7-17.0 100/38 12.8-14.9 14.1-16.3 15.3-17.7 110/43 13.3-15.4 14.5-16.7 16.0-18.5 Harvest Time1 0.75-2.
I0520 SERIES I0520A Self-Contained Air-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 8.8-10.3 10.2-11.9 11.7-13.7 Water Temperature °F/°C 80/27 9.9-11.6 11.4-13.3 13.8-16.1 90/32 10.7-12.5 13.6-15.8 15.4-17.9 100/38 12.5-14.5 14.8-17.2 16.6-19.3 110/43 15.4-17.9 16.6-19.3 18.1-21.0 Harvest Time1 1-2.
I0520W Self-Contained Water-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 9.1-10.7 10.9-12.7 11.7-13.7 80/27 9.4-11.0 11.2-13.1 12.1-14.1 90/32 9.6-11.3 11.6-13.5 12.5-14.5 100/38 9.9-11.6 11.9-13.9 12.9-15.0 110/43 10.2-11.9 12.3-14.3 13.3-15.5 Water Temperature °F/°C Harvest Time1 1-2.
I0600 SERIES I0600A Self-Contained Air-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10.0 70/21.1 90/32.2 70/21 7.6-9.0 9.5-11.2 10.2-12.0 80/27 8.8-10.4 9.9-11.7 10.5-12.3 90/32 9.7-11.4 11.0-12.9 11.4-13.4 100/38 11.1-13.1 12.3-14.4 12.8-15.0 Water Temperature °F/°C Harvest Time1 1-2.5 1 Times in minutes 24 HOUR ICE PRODUCTION Air Temp.
I0600W Self-Contained Water-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Around Ice Machine °F/°C Freeze Time Water Temperature °F/°C 50/10 70/21 90/32 70/21 7.6-9.0 9.0-10.6 9.7-11.4 80/27 8.8-10.4 9.1-10.7 9.9-11.7 90/32 9.6-10.6 9.1-10.7 9.9-11.7 100/38 9.1-10.7 9.5-11.2 10.2-12.0 Harvest Time1 1-2.5 1 Times in minutes 24 HOUR ICE PRODUCTION Air Temp.
I0600N Remote Air-Cooled Condenser Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time Water Temperature °F/°C 50/10 70/21 90/32 -20/-29 to 70/21 7.9-9.4 9.9-11.7 10.5-12.3 80/27 9.0-10.6 9.9-11.7 10.7-12.6 90/32 9.1-10.7 9.9-11.7 10.7-12.6 100/38 9.9-11.7 10.9-12.8 11.7-13.7 110/43 10.9-12.8 12.0-14.0 12.8-15.0 Harvest Time1 1-2.
I0850 SERIES I0850A Self-Contained Air-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Entering Condenser °F/°C 50/10 70/21 90/32 70/21 9.0-10.4 9.8-11.2 10.5-12.1 80/27 10.1-11.6 10.8-12.4 11.6-13.4 90/32 11.3-13.0 12.9-14.8 12.9-14.8 100/38 12.9-14.8 13.7-15.7 14.6-16.7 110/43 14.9-17.0 15.8-18.0 16.5-18.8 Water Temperature °F/°C Harvest Time1 1-2.
I0850W Self-Contained Water-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Around Ice Machine °F/°C Freeze Time Water Temperature °F/°C 50/10 70/21 70/21 8.4-9.7 9.5-10.9 10.7-12.3 80/27 8.7-10.1 9.7-11.1 10.8-12.6 90/32 9.1-10.5 11.4-13.1 11.0-12.8 100/38 9.5-10.9 10.3-11.9 11.3-13.0 Harvest Time1 90/32 1-2.5 1 Times in minutes 24 HOUR ICE PRODUCTION Air Temp.
I0850N Remote Air-Cooled Condenser Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 90/32 -20/-29 to 70/21 9.5-11.0 11.0-12.6 12.0-13.7 80/27 10.0-11.5 10.8-12.4 11.2-12.9 90/32 11.3-13.0 12.1-13.8 13.4-15.4 Water Temperature °F/°C 100/38 12.0-13.7 13.0-14.9 14.1-16.2 110/43 12.8-14.6 13.8-15.8 14.9-17.0 Harvest Time1 0.75-2.
I1000 SERIES I1000A Self-Contained Air-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 90/32 70/21 7.5-9.0 8.2-9.8 8.8-10.4 80/27 8.4-10.0 9.3-11.0 9.9-11.8 90/32 9.5-11.3 10.6-12.6 11.4-13.5 100/38 10.7-12.7 11.9-14.1 12.9-15.2 110/43 12.2-14.5 13.4-15.8 14.7-17.4 Water Temperature °F/°C Harvest Time1 0.75-2.
I1000W Self-Contained Water-Cooled Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine °F/°C 50/10 70/21 90/32 70/21 7.4-8.9 8.5-10.1 9.4-11.1 90/32 7.8-9.3 8.9-10.6 9.7-11.5 100/38 7.9-9.4 9.1-10.8 9.8-11.6 110/43 8.0-9.5 8.0-10.9 9.9-11.8 Water Temperature °F/°C Harvest Time1 0.75-2.0 1 Times in minutes 24 HOUR ICE PRODUCTION Water Temperature °F/°C1 Air Temp.
I1000N Remote Air-Cooled Condenser Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time Water Temperature °F/°C 50/10 70/21 70/21 7.7-9.2 8.6-10.3 9.5-11.3 80/27 8.5-10.1 9.5-11.3 10.4-12.3 Harvest Time1 90/32 90/32 9.5-11.3 10.6-12.6 11.4-13.5 100/38 10.7-12.7 11.6-13.8 12.4-14.7 110/43 12.2-14.5 12.7-15.0 13.6-16.1 0.75-2.
I1200 SERIES I1200A Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 90/32 70/21 8.3-9.3 8.9-10.0 9.7-10.8 10.6-11.8 Water Temperature °F/°C 80/27 9.2-10.3 9.9-11.0 90/32 10.2-11.3 10.9-12.2 11.8-13.2 100/38 11.4-12.6 12.3-13.6 13.3-14.8 110/43 12.9-14.3 13.9-15.5 15.1-16.8 Harvest Time1 0.75-2.
I1200W Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine °F/°C 50/10 70/21 90/32 70/21 7.5-8.7 8.4-9.8 9.7-11.2 11.1-12.8 Water Temperature °F/°C 80/27 8.5-9.9 9.7-11.2 90/32 8.6-10.0 10.1-11.7 11.2-12.9 100/38 8.7-10.1 10.5-12.2 11.2-13.0 110/43 8.8-10.2 10.6-12.3 11.3-13.1 Harvest Time1 0.75-2.0 1 Times in minutes 24 HOUR ICE PRODUCTION Water Temperature °F/°C1 Air Temp.
I1400 SERIES I1400A Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 90/32 70/21 8.3-9.5 9.1-10.4 10.2-11.6 80/27 9.1-10.4 9.9-11.3 11.2-12.8 90/32 9.6-11.0 11.3-12.8 12.0-13.7 100/38 10.7-12.2 12.6-14.3 13.6-15.4 110/43 12.0-13.6 14.3-16.2 14.5-16.5 Water Temperature °F/°C Harvest Time1 0.75-2.
I1400W Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine °F/°C 50/10 70/21 90/32 70/21 8.2-9.4 9.9-11.3 10.5-12.0 80/27 8.3-9.5 10.0-11.4 10.6-12.1 90/32 8.4-9.6 10.1-11.5 10.7-12.2 100/38 8.4-9.7 10.2-11.6 10.7-12.2 110/43 8.6-9.7 10.3-11.7 10.8-12.3 Water Temperature °F/°C Harvest Time1 0.75-2.0 1 Times in minutes 24 HOUR ICE PRODUCTION Water Temperature °F/°C1 Air Temp.
I1400N Remote Air-Cooled Condenser Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 80/27 Water Temperature °F/°C 70/21 90/32 8.8-10.1 9.9-11.3 10.9-12.3 9.0-10.2 10.1-11.5 11.0-12.5 90/32 9.2-10.5 10.6-12.1 11.4-13.0 100/38 9.9-11.3 11.6-13.2 12.6-14.3 110/43 11.1-12.6 11.8-13.4 13.7-15.6 Harvest Time1 0.75-2.
I1800 SERIES I1800A Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 90/32 70/21 8.8-10.1 9.6-11.0 10.5-11.9 80/27 9.6-11.0 10.7-12.2 11.5-13.1 90/32 10.4-11.8 11.8-13.4 12.6-14.3 100/38 11.4-13.0 13.1-14.9 14.1-16.0 110/43 12.8-14.5 14.9-16.9 16.1-18.2 Water Temperature °F/°C Harvest Time1 0.75-2.
I1800W Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine °F/°C 50/10 70/21 90/32 70/21 8.8-10.0 9.8-11.2 11.0-12.5 80/27 8.9-10.2 10.0-11.3 11.1-12.6 90/32 9.0-10.3 10.1-11.5 11.2-12.7 100/38 9.1-10.4 10.3-11.7 11.3-12.8 110/43 9.2-10.5 10.5-11.9 11.3-12.9 Water Temperature °F/°C Harvest Time1 0.75-2.
I1800N Remote Air-Cooled Condenser Model Characteristics vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Total Cycle Time Air Temp. Entering Condenser °F/°C Freeze Time 50/10 70/21 80/27 Water Temperature °F/°C 70/21 90/32 9.2-10.5 10.1-11.5 10.0-12.4 9.6-11.0 10.6-12.1 11.5-13.0 90/32 10.2-11.6 11.2-12.8 12.2-13.9 100/38 11.0-12.5 12.1-13.8 13.3-15.1 110/43 11.9-13.6 13.2-15.0 14.7-16.6 Harvest Time1 0.75-2.
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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. Some components are wired differently on energy efficient machines. Please verify your model number (page 15) to reference the correct diagrams.
I0300/I0450/I0500/I0520 Self Contained Air & Water-cooled - 1 Ph 256 Part Number STH025 02/12
I0320 Self Contained Air & Water-cooled - 1 Ph Part Number STH025 02/12 257
I0500 Remote Air-cooled - 1Ph 258 Part Number STH025 02/12
I0600/I0850/I1000/I1200 Self Contained Air & Water-cooled - 1 & 3 Ph Part Number STH025 02/12 259
I0600/I0850/I1000 Remote Condenser Air-cooled - 1 & 3 Ph 260 Part Number STH025 02/12
I1400/I1800 Self Contained Air & Water-cooled - 1 & 3 Ph Part Number STH025 02/12 261
I1400/I1800 Remote Air-cooled - 1 & 3 Ph 262 Part Number STH025 02/12
Electronic Control Board Bin Switches Bin Thermostat USB Display Light Micro Light Clean Light Harvest Light SL-1 Light SL-2 Light Thermistors T1 T2 Dump Valve T3 T4 Left Bin Switch Light Transformer Right Bin Switch Light Water Level Probe Light Display Ice Thickness Probe Light RS485 RT Harvest Bin LED LuminIce Battery Compressor LT Harvest Water Level Probe Fuse Pump Relay Lights Water Pump AuCS Water Remote CVD V C LPC HPC1 HPC2 Ice Thickness Probe Compressor L1 Dump L2 Not Used
Refrigeration Tubing Schematics SELF-CONTAINED AIR OR WATER -COOLED I0300/I0320/I0520/I0450/I0500/I0600/I0850/I1000 T4 Thermistor E VA P O R ATO R H E AT EXCHANGER EXPANSION VALVE T3 Thermistor H O T G A S S O L E N O I D VA LV E X A I R O R WAT E R CONDENSER COMPRESSOR STRAINER T2 Thermistor DRIER RECEIVER ( WAT E R C O O L E D O N LY ) T1 Thermistor I1400/I1800 T3 Thermistor HEAT EXCHANGER T4 Thermistor EXPANSION VALVE EXPANSION VALVE HARVEST SOLENOID VALVE COMPRESSOR x x EVAPORATOR HA
REMOTE CONDENSER MODELS I0500/I0600/I0850/I1000 T4 Thermistor EVAPORATOR HEAT EXCHANGER EXPANSION VALVE T3 Thermistor STRAINER X COMPRESSOR HOT GAS SOLENOID VALVE CHECK VALVE LIQUID LINE SOLENOID VALVE REMOTE CONDENSER HARVEST PRESSURE REGULATING VALVE HEAD PRESSURE CONTROL VALVE X DRIER T1 Thermistor H.P.R.
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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.
