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Multiplex MB-8-1, Technician'S Handbook

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Multiplex MB-8-1 Technician'S Handbook Download Page 148

148

Part Number STH034 3/12

HIGH PRESSURE CUTOUT (HPCO) CONTROL

FUNCTION
Stops the ice machine if subjected to excessive high-

side pressure. The HPCO control is normally closed, 

and opens on a rise in discharge pressure.
SPECIFICATIONS.

Specifications

Cut-Out

Cut-In

2930 kPa ±29.30 bar ±.69

425 psig ±10

Automatic Reset

Must be below 1978 kPa 19.78 bar (287 psig) to reset.

Summary of Contents for MB-8-1

Page 1: ...s Handbook This manual is updated as new information and models are released Visit our website for the latest manual www manitowocfsg com Leader in Ice Beverage Dispensers Blended Beverage System Par...

Page 2: ...t you as you work Throughout this handbook you will see the following types of procedural notices Warning Text in a Warning box alerts you to a potential personal injury situation Be sure to read the...

Page 3: ...service We will be happy to provide assistance Important Routine adjustments and maintenance procedures outlined in this handbook are not covered by the warranty Warning PERSONAL INJURY POTENTIAL Do n...

Page 4: ...er appliance Warning This appliance is not to be played with Unless all cover and access panels are in place and properly secured do not operate the equipment Warning Do not clean with water jet Warni...

Page 5: ...rd 13 Commercial Warranty Coverage 13 Limited Warranty For Multiplex Blended Ice Machine 13 Installation General 23 Dimensions 24 Location 27 Clearances 28 Heat of Rejection 28 Electrical 29 General 2...

Page 6: ...Bags 41 Calibration Procedure 41 Maintenance General Maintenance 45 Door Gasket Maintenance 45 Drain Maintenance Base 45 Caster Maintenance 46 Refrigerators 46 Stainless Steel Care and Cleaning 46 Cl...

Page 7: ...e 88 Ice Making Sequence of Operation 90 Version 1 Ice Machine R404A Refrigerant 90 Version 2 Ice Machines R404A or R290 Refrigerant 92 Product Dispense Operation 93 Operation 93 Refrigerated Cabinet...

Page 8: ...heck 105 Version 1 Ice Machine R404A Refrigerant 106 Version 2 Ice Machine R290 Refrigerant Electrical Troubleshooting Flowchart 111 Refrigerated Cabinet 116 Reach in temperature Out of Range Check Re...

Page 9: ...42 Version 1 Ice Machine R404A Refrigerant Solid State Timer 142 Version 1 Ice Machine R404A Refrigerant Solid State Time Delay Relay 146 Version 1 Ice Machine R404A Refrigerant Float Switch Water Con...

Page 10: ...r Ice Dispenser Wiring Diagram 167 Version 1 Ice Machine R404A Refrigerant Ice Maker Wiring Diagram 168 Version 1 Ice Machine R404A Refrigerant Ice Machine Wiring Diagram 169 Version 1 Ice Machine R40...

Page 11: ...erage Systems MB 8 1 MB 8 2 MB 8 1E MB 8 2E MB 8 1A MB 8 2A MB 8 1D MB 8 2D MB 8 1U MB 8 2U MB 8 1P MB 8 2P MB000A01 MB000A02 MB000A03 MB000A04 MB000A05 Warning Some 50 hz models may contain up to 15...

Page 12: ...the appliance by a person responsible for their safety Do not allow young children to play with the appliance Warning Do not use electrical appliances or accessories other than those supplied by Multi...

Page 13: ...c Beverage Systems a division of Manitowoc FSG Operations LLC Company warrants to the original end user Owner for a period of one 1 year from the installation date except as limited below that this ne...

Page 14: ...or this PM If the blender assembly has accrued 13 000 cycles prior to expiration of the initial one year warranty period then once the PM is completed in compliance with the instruction manual the war...

Page 15: ...as qualified and authorized by the Company s local distributor The Company s liability under this warranty shall in no event be greater than the actual purchase price paid by Owner for the Machine Th...

Page 16: ...patible supplies or lack of specified maintenance Normal maintenance items including but not limited to light bulbs fuses containers gaskets LMS Valves or product stickers used in the unit O rings int...

Page 17: ...any responsibility or obligations associated therein null and void This includes any damage costs or legal actions resulting from the installation of any Company equipment in a non commercial applicat...

Page 18: ...ng negligence strict liability implied by statute common law or otherwise and Company its servants and agents shall not be liable for any claims for personal injuries or consequential damages or loss...

Page 19: ...t or services shall be deemed a breach with respect to that item or unit or service only Warranty Claim Procedure Customer shall be responsible to Immediately advise the Company s Authorized Service A...

Page 20: ...__________________________ Serial Number______________________________ Installation Date____________________________ General Conditions Multiplex shall not be liable in any manner for any default or d...

Page 21: ...whether written or oral express or implied This warranty supersedes and excludes any prior oral or written representations or warranties Multiplex expressly disclaims any implied warranties of mercha...

Page 22: ...22 Part Number STH034 3 12 This Page Intentionally Left Blank...

Page 23: ...t Failure to follow these installation guidelines may affect warranty coverage Manager Default Password A Temperature Control Setting 36 F setpoint 4 F differential 2 C setpoint 2 C differential contr...

Page 24: ...24 Part Number STH034 3 12 Dimensions A 26 00 66 cm B 32 82 83 cm A B Elevation View...

Page 25: ...Part Number STH034 3 12 25 C 71 19 181 cm F 26 00 66 cm D 65 19 166 cm H 75 07 191 cm E 60 25 153 cm F H E D C Elevation View...

Page 26: ...26 Part Number STH034 3 12 G 32 82 83 cm J 39 09 99 cm I 36 15 92 cm G I J Side View...

Page 27: ...regulator min max 50 psi 80 psi 3 5 BAR 6 2 BAR Minimum clearances must be maintained from all walls and combustible materials Keep equipment area clear of combustible material Warning Carbon Dioxide...

Page 28: ...m Warning Do not obstruct machine vents or openings Model Heat of Rejection BTU h Air Conditioning Peak Cabinet All Single Dual Spindle 2100 2600 Ice Machine MB 8 1 MB 8 2 MB 8 1E MB 8 2E MB 8 1A MB 8...

Page 29: ...gauge is also dependent upon location materials used length of run etc so it must be determined by a trained qualified electrician ELECTRICAL REQUIREMENTS Refer to Model Serial Plate for voltage amper...

Page 30: ...es information listed on this page Model Numbers Voltage Cycle Refrigerant Total Amps Breaker Size MB 8 1 Dual Spindle 120 60 1 R404A 16 0 20A MB 8 2 Single Spindle 120 60 1 R404A 16 0 20A MB 8 1E Dua...

Page 31: ...4A 8 7 20A MB 8 1P Dual Spindle 230 240 50 1 R404A 8 7 20A MB 8 2P Single Spindle 230 240 50 1 R404A 8 7 20A MB000A01 Dual Spindle 120V 60 1 16 0 20A MB000A02 Single Spindle 230 240 50 1 R404A 8 7 20A...

Page 32: ...st be plugged into an appropriate outlet that is properly installed and grounded in accordance with all local codes and ordinances BONDING INSTRUCTIONS 230 240V 50 HZ MODELS ONLY This appliance must b...

Page 33: ...the following must be included Do not unplug by pulling on cord To unplug grasp the plug not the cord Unplug from outlet when not in use and before servicing or cleaning Do not operate any appliance w...

Page 34: ...lines Use supplied 3 8 panel mounted hose barb and 6 1 8 m of beverage tubing to connect coupling body fitting on back of unit into water supply Do not connect to a hot water supply Be sure all hot w...

Page 35: ...n Assembly Use supplied 3 8 panel mounted hose barb and 6 1 8 m of beverage tubing to connect coupling insert on back of unit into CO2 supply 2 Supply pressure 50 PSI min and 80 PSI max 3 Product pres...

Page 36: ...f the unit to be sure legs or casters are not bent 6 Also open the compressor compartment housing and visually inspect the refrigeration package Be sure lines are secure and base is still intact 7 Fre...

Page 37: ...x of parts supplied with BIC on existing supply CO2 and water hose 17 Confirm correct orientation of fittings 18 Install drain hose on BIC and cut to proper length do not leave loops in drain 19 Conne...

Page 38: ...ct bins put labels in correct place 32 Demonstrate to store manager how to install cold product bags into product bins and install into BIC 33 Demonstrate to store manager how to load recipes 34 Demon...

Page 39: ...for air circulation Is the machine grounded and polarity correct Has the machine been installed where ambient temperatures will remain in the range of 40 90 F 4 32 C Has the machine been installed wh...

Page 40: ...in Menu select Manager Type in the password and select the green check Select the down arrow to navigate to the next screen Select Updates Select Recipes Select the UPDATE RECIPES FROM USB icon Verify...

Page 41: ...the green check Select Full Bag Place cup under dispenser Select the pump icon Dispensing will display on the screen If a small amount of product has been pumped into the cup select the green check I...

Page 42: ...Select Calibrate Flavor Select the flavor water or ice to calibrate 1 Get Scale 2 Tare Empty Cup Weight 3 Position Cup For Dispense Flavor and water target is 4 oz Ice target is 6 oz 1 Wait until disp...

Page 43: ...Part Number STH034 3 12 43 3 Tap button to enter weight Enter the cup weight Select the green arrow The calibration screen will return select the green arrow...

Page 44: ...44 Part Number STH034 3 12 Flavor 4 oz Calibration Complete The calibration screen returns Chose another flavor water or ice to calibrate or return to the Configure Slots screen...

Page 45: ...the door and new gaskets can be pressed back into place DRAIN MAINTENANCE BASE Each unit has a drain located inside the unit that removes the condensation from the evaporator coil and routes it to an...

Page 46: ...ll scratch the stainless steel and can damage the breaker strips and gaskets STAINLESS STEEL CARE AND CLEANING To prevent discoloration or rust on stainless steel several important steps need to be ta...

Page 47: ...be cleaned with a non abrasive cleaner and plastic scrub pad Always rub with the grain of the steel There are stainless steel cleaners available which can restore and preserve the finish of the steel...

Page 48: ...cleaner or stiff brush If extremely dirty a commercially available condenser cleaner may be required Failure to maintain a clean condenser coil can initially cause high temperatures and excessive run...

Page 49: ...into the storage area Failure to follow these recommendations could result in damage to the interior of the cabinet or to the blower coil Overloading the storage area restricting the airflow and cont...

Page 50: ...ning kits are available for single and dual spindle units These kits include the following 3 three 5 gallon buckets Bucket labels for Wash Rinse Sanitizing Red Blue cups for blender cleaning Dispense...

Page 51: ...gal or 0 425 oz 5 gal Spray sanitizer KAY 5 Sanitizer Cleaner min 0 40 oz gal or 2 0 oz 5 gal Medium cups with wash and sanitize solution Press the down arrow to continue If other cleaners are used i...

Page 52: ...ve center grate from dispensing area 2 Spray all dispensing area surfaces with cleaning solution 3 Thoroughly wipe down all surfaces of dispensing area and verify dispense area drains completely Press...

Page 53: ...the down arrow to continue Blender assembly wash 1 Completely spray blender assembly with cleaning solution 2 Thoroughly wipe down top of blender cap and blender arm 3 Lift blender cap and thoroughly...

Page 54: ...l dispensing area grate 5 Reinstall left and right mixer doors Press the down arrow to continue Blender wash 1 Place cup with wash solution in both blender stations Close the blender doors 2 Press the...

Page 55: ...r solution in both blender stations 3 Press the green check Sanitizing will display on the screen Mixer station sanitize 1 Remove cup from each blender station and pour sanitizing solution down the dr...

Page 56: ...tizer solution 3 Allow to air dry 4 Do not wipe off sanitizer Cleanup any spills on or around he unit then press the green check to signify you have completed the daily cleaning On the Menu screen pre...

Page 57: ...anitize solution 6 Splash shield 7 Cleaning manifold Press the down arrow to continue If other cleaners are used it is possible they will not clean or sanitize your machine to NSF standards Washing in...

Page 58: ...ct nozzle 8 Place cleaning manifold in wash bucket 9 Press the green check Select Manual Clean or Auto Clean Auto clean will send the wash solution through each line slot displaying the progress on th...

Page 59: ...through each line slot The screen will read Rinsing Slot X Each slot will change from Washed to Rinsed Sanitization instructions 1 Remove cleaning manifold from rinse bucket 2 Place cleaning manifold...

Page 60: ...slot blowing out any remaining liquid The screen will read Purging Slot X Each slot will change from Sanitized to Purged Reinstall inventory 1 Retrieve product holders from walk in 2 Reinstall each pr...

Page 61: ...d right mixer stations 2 Spray all mixer station inside surfaces with cleaning solution 3 Thoroughly wipe down all surfaces of mixer station 4 Repeat for other side Press the down arrow to continue Di...

Page 62: ...vidual dispense nozzle with cleaning solution 5 Thoroughly wipe with a clean towel Press the down arrow to continue Mixer door removal 1 Slightly open mixer door 2 Squeeze at bottom of door 3 Tilt out...

Page 63: ...down top of blade housing and bottom of blender cap 4 Thoroughly spray blender assembly with sanitizer solution 5 Repeat for other side Press the down arrow to continue Reinstall grates doors 1 Take a...

Page 64: ...e blender doors 2 Press the green check The blenders will lower into the wash solution and spin to clean Washing will display on the screen Follow the on screen instruction Remove Cup Follow the on sc...

Page 65: ...sanitizer solution in both blender stations 3 Press the green check Sanitizing will display on the screen Mixer station sanitize 1 Remove cup from each blender station and pour sanitizing solution do...

Page 66: ...ion 3 Allow to air dry 4 Do not wipe off sanitizer Cleanup any spills on or around he unit then press the green check to signify you have completed the daily cleaning Weekly cleaning completed 1 Weekl...

Page 67: ...formance of this ice Machine the following consumable parts need periodic inspection maintenance and replacement Extruding Head Housing Lower Bearing Gear Motor Auger Mechanical Seal To prevent injury...

Page 68: ...gitator and the bottom of the ice bin 8 Use an approved cleaning solution as noted below NOTE For safety and maximum effectiveness use the solution immediately after dilution Mix 10 fl oz 296 ml LIME...

Page 69: ...anitizer solution Rinse with a clean towel soaked in clean water and wipe dry 15 With a bottle brush brush the ice nozzle at bottom of ice bin with cleaning solution Rinse with a clean towel soaked in...

Page 70: ...ution is drained roughly two minutes move the rocker switch to the ICE position 22 Allow the reservoir to fill with fresh water Move the rocker switch to the Drain position for 2 minutes 23 Repeat fil...

Page 71: ...witch to the ICE position 32 Run the ice Machine for 20 minutes 33 Turn OFF the ice Machine power switch 34 Remove ice chute in order to replace parts NOTE Discard the ice Do not use ice made from the...

Page 72: ...ing water supply and disconnect power 2 Remove the following parts Top by removing four thumbscrews Ice chute cover Ice dispense motor assembly by removing four thumbscrews Place motor assembly in a l...

Page 73: ...zle at bottom of ice bin Rinse wipe dry repeat with sanitizer solution and allow to air dry 8 Drain water from evaporator and reservoir through the evaporator reservoir drain line and reinsert hose in...

Page 74: ...nect ice transport tube direct to evaporator and secure with hose clamp 12 Disconnect power then drain the water from the evaporator and reservoir through the evaporator reservoir drain line Using a p...

Page 75: ...water solution as the water level in the reservoir drops NOTE Do not allow the sanitizer water level to drop below the sensing probes The ice machine will start a 20 minute delay period if the sensing...

Page 76: ...itch in the OFF position disconnect power and discard all ice produced 24 Turn ON the ice Machine power switch 25 Replace all cleaned parts in their correct positions small washer assembled dispense w...

Page 77: ...and cleaning are the other selections accessed through the main screen Inventory Screen The inventory screen visually displays levels for all flavors Underneath each flavor is the time remaining until...

Page 78: ...re Slots Updates Auto Wash Timer and Service When the manager screens are inactive for a time period the screen will return to the drink menu The service screen is password protected and removes all d...

Page 79: ...hen necessary Temperatures The nozzle cabinet and defrost temperatures will help diagnose refrigeration problems Configure Slots Slot Flavor allows the manager to assign flavors to slots Calibrate Fla...

Page 80: ...and Recipes Screens allow the manager to plug a USB flash drive in and upload new firmware and recipes Auto Wash Timer Allows the manager to turn on or off and set up periodic automatic wash clean an...

Page 81: ...m have also proven workable Cup thickness material composition diameter and cup height play an important role in the workability of the cup within the machine The following are cup general guidelines...

Page 82: ...nu screen press the book icon 2 Select a category of recipes 3 Specific drink combinations are displayed on the next screen If a drink is not available it will be highlighted with a red square around...

Page 83: ...under center dispenser 6 Press the green check 7 As the flavor dispenses into the cup the screen will display DISPENSING 8 If ingredients need to be manually added the screen will give specific direc...

Page 84: ...sponding right or left flashing green blue arrow 10 While the drink is mixing the screen will read Blending 11 Follow all drink specific screen directions and press the flashing arrow 12 When the blen...

Page 85: ...laced Products with less than 10 inventory or less than 24 hours until product expires will be displayed with a yellow bar Products that are expired will be displayed with a red bar 3 Remove product b...

Page 86: ...spout on product bag into slot of the product bin 7 The spout must snap into slot of product bin 8 Open the cap on the product bag and tear it off 9 Return product bin to its position in cabinet 10 Se...

Page 87: ...Part Number STH034 3 12 87 11 Place cup under dispenser and hold icon to prime 12 Select another product to be replaced or return to the previously active screen...

Page 88: ...drive at a time If multiple firmware bin files are on the flash drive the first one in alphabetical order would be loaded and may not be the current version 5 Flash Drive must be formatted to FAT or F...

Page 89: ...INTERFACE Icon 9 Verify version to be loaded is correct and press the Green Check 10 Firmware will show status of update as a percentage and screen will display UPDATE COMPLTE when finished Important...

Page 90: ...F 4 The infrared bin control senses ice for 6 continuous seconds and starts a 90 second delay period After the 90 second delay period the compressor stops 90 seconds after the compressor stops the gea...

Page 91: ...after the flush switch is moved to the Drain position the flush valve opens and flushes the reservoir and evaporator The drain cycle continues until the switch is moved to the Ice position If the ice...

Page 92: ...er switch is moved to ON B Ice does not contact the bin thermostat bulb C The water reservoir is full of water With power supplied and the compressor rocker switch in the ON position the gear motor an...

Page 93: ...d correctly connected to adapter tubing Ice is available Water is supplied at the correct pressure A recipe has been developed in MenuConnect and transferred to the control board with a usb drive OPER...

Page 94: ...ferential the compressor relay closes provided the following conditions are satisfied Power has been uninterrupted to the control board for a 3 minute period OR The 3 minute compressor time delay has...

Page 95: ...LARM High temp alarm will display when product thermistor is above 42 F for 30 minutes and the following conditions are satisfied 3 hours since power is applied 1 hour since cleaning cycle Error displ...

Page 96: ...96 Part Number STH034 3 12 This Page Intentionally Left Blank...

Page 97: ...y 6 Verify 24VDC is present at the transformer secondary 7 Verify fuse on 24 VDC supply is closed 8 Verify 24 VDC is present at main control board MTA2 J35 connector Disconnect and reconnect wiring to...

Page 98: ...eplace main control board NOTE On double spindle models both blender assemblies will require testing 13 24 VDC on Motor Controller Board MTA2 J1 No Replace wire Yes Go to next step 14 Home position sw...

Page 99: ...EDURE TO CLEAR BLOCKED LINE 1 Fill a squirt bottle with very warm water 2 Remove product bin 3 Connect squirt bottle with vinyl tubing to product tube inlet 4 Select the inventory icon from the main m...

Page 100: ...100 Part Number STH034 3 12 6 Select the green arrow twice without following the product replacement instructions 7 Select Prime Flavor 8 Place a cup under dispenser...

Page 101: ...bottle Watch for product to enter the cup 10 Repeat Step 6 until valve clears and product and or water enters the cup 11 Disconnect squirt bottle with vinyl tubing Insert product bin back into unit 12...

Page 102: ...spense properly No Refer to Will Not Run Diagnostics on page 97 Yes Determine malfunctioning recipe slot number and continue with next step NOTE Refer to Before Beginning Service on page 103 to initia...

Page 103: ...ay all the time only during the Freeze cycle etc When do you notice low ice production one day a week every day on weekends etc Can you describe exactly what the ice machine seems to be doing Has anyo...

Page 104: ...essure not between 30 and 90 psig Install a water regulator valve or increase the water pressure Incoming water temperature is not between 45 F 1 7 C and 90 F 32 2 C If too hot check the hot water lin...

Page 105: ...ds 3 Weigh the container and ice then deduct the weight of the container 4 Convert ounces to pounds 5 Example 3 lbs 12 oz converts to 3 75 lbs 6 12 oz 16 oz 75 lb 7 Determine the 24 hour ice productio...

Page 106: ...21 minutes Bad contacts Check for continuity and replace Flush Switch FLUSH position Move to ICE position Bad contacts Check for continuity and replace Transformer Coil winding opened Replace Control...

Page 107: ...art Gear Motor Fuse Bussman GMD 1 5A Blown fuse See Other table Gear motor fuse blows or circuit breaker trips frequently Find out the cause and replace the fuse Thermal Protector Gear Motor Bad conta...

Page 108: ...ine or components plugged Clean and replace drier Bad contacts Check for continuity and replace Loose connections Tighten Gear motor and compressor start but no ice is produced Refrigerant Line Gas le...

Page 109: ...rigerant line Blocked Replace the blocked component Overcharged Recharge High Side Pressure Too High Dirty air filter or condenser Clean Ambient temperature too warm Relocate to cooler area Fan rotati...

Page 110: ...freezing cylinder Remove auger Use Manitowoc Ice Machine Cleaner solution to clean periodically If the water is found hard by testing install a softener Overflow from reservoir Water does not stop Wa...

Page 111: ...ht On Replace Control Board NO Bin Thermostat Closed NO Replace Thermostat Ice Contacting Thermostat Remove Ice Allow To Warm And Retest Adjusting Closes Thermostat Verify New Setting Cycles Machine O...

Page 112: ...e Yes No Yes Time Delay BT Light Off 20 Minute Time Delay Period Depress Control Board Reset Button To Override Delay Period Reservoir Full Strainer Clean Float Valve OK Clean Repair Or Replace Water...

Page 113: ...n To Override Delay Period Press Control Board Reset Button Flashing Stops Gear Motor And Compressor Energize Determine Cause Of Water Loss Yes No Compressor C Light On Compressor Switch In On Positio...

Page 114: ...ents Function Compressor Windings Are OK Repair Wiring Line Voltage Control Board Compressor And Fan Terminals NO or Only One Component Has Line Voltage Yes Replace Control Board Reset Or Replace High...

Page 115: ...tor From Evaporator YES 60M Light On 2nd Light On Locked Out Due To Over Torque Condition Verify No Ice In Evaporator Depress Control Board Reset Button Perform Heavily Scaled Cleaning Procedure YES Y...

Page 116: ...rated Cabinet Refrigerated Cabinet Flowchart R404A or R290 Refrigerant Power Supplied Switch In ON Position Move Switch To ON Position Plug In Reset Breaker No Yes No Yes Touch Screen Energized No Yes...

Page 117: ...roduct Replace Thermostat Too Much Warm Product Too Many Door Openings Ice On Evaporator Coil Duct Fan Not Energized Defective Thermistor Adjusting Opens Thermostat Verify New Setting Cycles Machine O...

Page 118: ...essor Starts After 15 Minutes No Yes No Yes Verify Compressor Overload is Closed Start Components Function Condenser Fan Motor Functions Voltage Must Be Within 10 Of Nameplate At Compressor Startup Co...

Page 119: ...Functions Voltage Is Within 10 Of Nameplate Clean The Condenser Coil Restricted Clearances High Ambient Ice On Evaporator Coil Or Restricted Airflow Compressor Runs Continuous No Yes Yes Check Tempera...

Page 120: ...Refrigeration diagnostics Below temperature limit Check temperature setpoint Check thermistor Check compressor relay on relay circuit board HIGH PRODUCT TEMPERATURE CHECK DUCT COOLING FAN Product temp...

Page 121: ...ts 3 Measure the actual discharge pressure temperature 4 Compare the measurements step 3 with the published pressure temperature step 2 Measurements will fall within the published range on normally op...

Page 122: ...r refrigerant charge Undercharged Wrong type of refrigerant Other Low ambient temperature High side refrigerant lines component restricted before mid condenser Suction pressure is too low and affectin...

Page 123: ...Suction Pressure High Checklist Problem Cause Improper installation Refer to Installation procedures Discharge pressure Discharge pressure temperature is too high and is affecting suction pressure tem...

Page 124: ...Discharge Pressure Temperature Low Checklist Improper refrigerant charge Undercharged Wrong type of refrigerant Other Non Manitowoc components in system Restricted plugged liquid line drier Restricted...

Page 125: ...actual discharge pressure temperature 4 Compare the measurements step 3 with the published pressure temperature step 2 Measurements will fall within the published range on normally operating ice mach...

Page 126: ...r refrigerant charge Undercharged Wrong type of refrigerant Other Low ambient temperature High side refrigerant lines component restricted before mid condenser Suction pressure is too low and affectin...

Page 127: ...Suction Pressure High Checklist Problem Cause Improper installation Refer to Installation procedures Discharge pressure Discharge pressure temperature is too high and is affecting suction pressure tem...

Page 128: ...Discharge Pressure Temperature Low Checklist Improper refrigerant charge Undercharged Wrong type of refrigerant Other Non Manitowoc components in system Restricted plugged liquid line drier Restricted...

Page 129: ...stem Specifications Double pole double throw switch Check Procedure Use a voltmeter ohm meter to check switch operation 1 Inspect the switch for correct wiring 2 Isolate the switch by disconnecting th...

Page 130: ...LAY Function Removes full load amperage of components and motors from toggle switch Check Procedure 1 Check for line voltage at relay coil Line voltage present Replace relay No line voltage present Re...

Page 131: ...t transformer primary No line voltage present Refer to power relay and toggle switch check procedures Line voltage present Continue diagnostics 3 Check voltage at transformer secondary 24 volts presen...

Page 132: ...toggle switch off on or disconnecting and reconnecting main power supply Refer to appropriate flowchart for the problem you are encountering Touch screen and control board diagnostics are covered by a...

Page 133: ...kPa CHECK PROCEDURE 1 Verify incoming supply pressure is within the minimum and maximum specifications the regulator is at setpoint and the supply line is sized correctly to supply sufficient flow 2 E...

Page 134: ...Check Procedure CONTINUAL WATER FLOW 1 Place power switch in off position Flow continues Replace valve Flow stops Replace relay board NO WATER FLOW 1 Verify water is supplied 2 Energize the water val...

Page 135: ...tor setting is correct 2 Verify pressure is present at valve inlet 3 Check for 24 VDC at coil 24 volts is not present Refer to Home Position Switch on page 139 24 volts present Continue 4 Relieve CO2...

Page 136: ...pump can be thawed and made operational 2 Perform clearing a blocked pump procedure 3 Verify pressure regulator setting is correct 4 Verify pressure is present at product pump inlet 5 Disconnect pres...

Page 137: ...Specification 24 VDC Check Procedure 1 Isolate by disconnecting the wiring connectors 2 Check continuity across the terminals with an ohm meter Open OL Replace motor Resistance Motor windings are good...

Page 138: ...solate by disconnecting the wiring connectors 2 Check continuity across the terminals with an ohm meter Open OL Replace motor Resistance Motor windings are good 3 Check rotor for excessive play or bin...

Page 139: ...cification SPST Normally Open Check Procedure Use a voltmeter ohm meter to check switch operation 1 Inspect the switch for correct wiring 2 Isolate the switch by disconnecting the wiring connectors 3...

Page 140: ...SPST normally open switch Check Procedure Use a voltmeter ohm meter to check switch operation 1 Inspect the switch for correct wiring 2 Isolate the switch by disconnecting the wiring connectors 3 Che...

Page 141: ...heck Procedure CONTINUAL WATER FLOW 1 Place power switch in off position Flow continues Replace valve Flow stops Replace relay board NO WATER FLOW 1 Verify water is supplied 2 Energize the water valve...

Page 142: ...otor and the compressor from starting or stopping simultaneously To reduce remaining ice in the refrigeration casing To protect the unit in case of low water and low water pressure To protect the unit...

Page 143: ...and open contacts 1 and 5 to de energize the control transformer and the gear motor relay S1 Power ON OFF Switch S2 ICE FLUSH Switch F1 1A Control Fuse F2 2A Gear Motor Fuse CB Timer Board TR Control...

Page 144: ...terminals 3 and 4 on the timer board low water protection circuit Contacts 3 and 5 close to put the bottom float in charge of the relay coil holding circuit Contact 1 is no longer energized to supply...

Page 145: ...the gear motor Contacts 4 and 12 open to the Drain Valve these contacts will not allow the drain valve to energize unless the gear motor relay is de energized and the gear motor is not running When th...

Page 146: ...l 6 trigger energizes the relay switches the contacts from NC to NO and starts the time delay Reset Applying power to terminal 6 trigger or removing line voltage from terminals 1 or 2 will reset the t...

Page 147: ...valve to maintain the correct water level during the freeze cycle Check Procedure Use a voltmeter ohm meter to check switch operation 1 Inspect the switch for correct wiring 2 Isolate the switch by d...

Page 148: ...ice machine if subjected to excessive high side pressure The HPCO control is normally closed and opens on a rise in discharge pressure SPECIFICATIONS Specifications Cut Out Cut In 2930 kPa 29 30 bar 6...

Page 149: ...ck wire until ice is sensed When ice is sensed power is removed from the black wire 1 Green light indicates the sensor is receiving power and is not sensing ice A line voltage signal is sent down the...

Page 150: ...s Specifications 5 000 Ohms 2 at 25 C 77 F 16 330 Ohms 2 at 0 C 32 F Check Procedure NOTE Use a multimeter to check operation 1 Reboot machine by moving toggle switch off on 2 Inspect for correct wiri...

Page 151: ...emperature rises at the thermistor block the resistance drops If the ohmmeter reads OL check the scale setting on the meter before assuming the thermistor is bad C F OHM 17 8 0 43 297 15 0 5 36 503 12...

Page 152: ...the evaporator to maintain cabinet temperature at setpoint Check Procedure 1 Isolate by disconnecting the wiring connectors 2 Check continuity across the terminals with an ohm meter Resistance Motor...

Page 153: ...to maintain cabinet temperature in the beverage lines Specifications 24 VDC 2 4 watt Check Procedure 1 Isolate by disconnecting the wiring connectors 2 Check continuity across the terminals with an o...

Page 154: ...ndenser to condense refrigerant from vapor to liquid state Check Procedure 1 Isolate by disconnecting the wiring connectors 2 Check continuity across the terminals with an ohm meter Resistance Motor w...

Page 155: ...SSORS Disconnect power then remove the wires from the compressor terminals The resistance values between C and S and between C and R when added together should equal the resistance value between S and...

Page 156: ...g slowly and is not seized Check the capacitors and relay COMPRESSOR DRAWING HIGH AMPS The continuous amperage draw on start up should not be near the maximum fuse size indicated on the serial tag DIA...

Page 157: ...rant charge Using an improperly sized filter drier will cause the refrigeration system to be improperly charged with refrigerant Driers are covered as a warranty part The drier must be replaced any ti...

Page 158: ...158 Part Number STH034 3 12 This Page Intentionally Left Blank...

Page 159: ...fy refrigerant type and amount Warning Some 50 hz models may contain up to 15 grams of R290 propane refrigerant R290 propane is flammable in concentrations of air between approximately 2 1 and 9 5 by...

Page 160: ...onal Charts Characteristics will vary depending on operating conditions R404A REFRIGERANT REFRIGERATED CABINET OPERATING PRESSURES Air Temperature Entering Condenser F C Discharge Pressure PSIG Suctio...

Page 161: ...52 195 49 185 47 180 80 46 170 44 165 42 160 90 16 150 39 150 37 140 gal day liter day 100 36 135 35 130 32 120 EVAPORATOR OUTLET TEMP 70 3 16 3 16 3 16 80 3 16 9 13 9 13 90 9 13 9 13 12 11 F C 100 1...

Page 162: ...Temperature Water Temperature C 24 Hour Ice Production kWH 45 kg 21 C 10 C 186 kg 4 21 32 C 10 C 156 kg 5 24 43 C 38 C 122 kg 6 93 Air Temperature Entering Condenser C Discharge Temperature Suction T...

Page 163: ...ng Diagrams The following pages contain electrical wiring diagrams Be sure you are referring to the correct diagram for the Blend In Cup Beverage System you are servicing Warning Always disconnect pow...

Page 164: ...164 Part Number STH034 3 12 This Page Intentionally Left Blank...

Page 165: ...L BLENDER 1 AC L 24VDC 24VDC DC GND DC GND MTA 4 MTA 4 MTA 4 MTA 4 J10 J10 J12 J12 J1 J1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 4 4 4 4 1 1 2 2 MTA 2 MTA 2 J 2 J 7 J 7 J 2 J 5 J 5 J 6 J 6 J4 J4 J9 J...

Page 166: ...Compressor Assy Condenser Fan Motor DUCT FAN LEFT EVAPORATOR FAN RIGHT EVAPORATOR FAN EVAPORATOR SYRUP SUPPLY INLET TYP SYRUP PUMP TYP SYRUP SOLENOID MANIFOLD TYP SYRUP VALVES SHT1 SHT1 SHT1 AC AC Co...

Page 167: ...T RED RED ORN BRN ORN BLK BLK RED RED BLU BLU BRN BRN RED ORN WHT LTBLU LTBLU BLU GRY VIO ORN 4 YEL 1 2 3 WHT BRN BRN 4 VIO ELECTRICAL ENCLOSURE REFERENCE SHEET 4 Refrigerant RED GRY ABB KRDB421 BRN B...

Page 168: ...LK BLK BLU BLU BRN BRN RED RED ORN WHT RED LTBLU LTBLU BLU LTBLU GRY GRY FLOAT SWITCH FLOAT SWITCH FLOAT SWITCH DRAIN VALVE DRAIN VALVE RED ORN VIO ORN F1 BRN ICE MAKER AC ON OFF SW2 ICE DRAIN GEAR MO...

Page 169: ...Part Number STH034 3 12 169 VERSION 1 ICE MACHINE R404A REFRIGERANT ICE MACHINE WIRING DIAGRAM...

Page 170: ...170 Part Number STH034 3 12 VERSION 1 ICE MACHINE R404A REFRIGERANT ICE MACHINE LOGIC DIAGRAM...

Page 171: ...AR MOTOR PROTECT RELAY X5 WATER CONTROL RELAY X6 GEAR MOTOR RELAY SR STARTER SC START CAPACITOR RC RUN CAPACITOR CB CONTROL BOARD C1 CAPACITOR GEAR MOTOR C2 CAPACITOR FAN MOTOR CM COMPRESSOR GM GEAR M...

Page 172: ...MTA 4 MTA 4 J10 J10 J12 J12 J1 J1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 4 4 4 4 1 1 2 2 MTA 2 MTA 2 J 2 J 7 J 7 J 2 J 5 J 5 J 6 J 6 J4 J4 J9 J9 J8 J13 J13 MODBUS MODBUS DOOR SWT DOOR SWT HOME SWT H...

Page 173: ...Fan Motor DUCT FAN LEFT EVAPORATOR FAN RIGHT EVAPORATOR FAN EVAPORATOR SYRUP SUPPLY INLET TYP SYRUP PUMP TYP SYRUP SOLENOID MANIFOLD TYP SYRUP VALVES SHT1 SHT1 SHT1 AC AC Condenser DEFROST PROBE TYP...

Page 174: ...U BLU WHT WHT ELECTRICAL ICE MACHINE ENCLOSURE REFERENCE SHEET 4 Refrigerant BRN BLACK BROWN BLU ICE MAKER REFRIGERANT PRESSURE SWITCH Ice Dispenser Position Switch WHT BLK BLK SHT1 ICE COMPRESSOR AC...

Page 175: ...Part Number STH034 3 12 175 VERSION 2 ICE MACHINE R290 REFRIGERANT ICE MAKER WIRING DIAGRAM...

Page 176: ...e Machine R404A Refrigerant RESERVOIR WATER INLET CONTROL WATER VALVE FLOAT SWITCH OVERFLOW WATER LEVEL EVAPORATOR DRIER SPOUT EXPANSION VALVE GEAR MOTOR FLUSH WATER VALVE CONDENSER FAN MOTOR CONDENSE...

Page 177: ......

Page 178: ...Manitowoc Foodservice 2100 Future Drive Sellersburg IN 47172 USA Ph 812 246 7000 Fax 812 246 7026 Visit us online at www manitowocfsg com 2012 Manitowoc Part Number STH034 3 12...

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