Welbilt Manitowoc NEO UDP0080A Technician's Handbook
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Welbilt Manitowoc NEO UDP0080A Technician's Handbook

Refrigerant undercounter ice machines
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UDP R290 Refrigerant
Undercounter Ice Machines
Technician's Handbook
This manual is updated as new information and models are
released. Visit our website for the latest manual.
www.manitowocice.com
Part Number STH098 06/19

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Summary of Contents for Welbilt Manitowoc NEO UDP0080A

  • Page 1 UDP R290 Refrigerant Undercounter Ice Machines Technician’s Handbook This manual is updated as new information and models are released. Visit our website for the latest manual. www.manitowocice.com Part Number STH098 06/19...
  • Page 3 Safety Notices Read these precautions to prevent personal injury: • Read this manual thoroughly before operating, installing or performing maintenance on the equipment. Failure to follow instructions in this manual can cause property damage, injury or death. • Routine adjustments and maintenance procedures outlined in this manual are not covered by the warranty.
  • Page 4 Warning Follow these electrical requirements during installation of this equipment. • All field wiring must conform to all applicable codes of the authority having jurisdiction. It is the responsibility of the end user to provide the disconnect means to satisfy local codes. Refer to rating plate for proper voltage.
  • Page 5 Warning Follow these precautions to prevent personal injury during installation of this equipment: • Installation must comply with all applicable equipment fire and health codes with the authority having jurisdiction. • To avoid instability the installation area must be capable of supporting the combined weight of the equipment and product.
  • Page 6 Warning Follow these precautions to prevent personal injury while operating or maintaining this equipment. • Legs or casters must be installed and the legs/casters must be screwed in completely. When casters are installed the mass of this unit will allow it to move uncontrolled on an inclined surface.
  • Page 7 Warning Follow these precautions to prevent personal injury while operating or maintaining this equipment. • Objects placed or dropped in the bin can affect human health and safety. Locate and remove any objects immediately. • Never use sharp objects or tools to remove ice or frost.
  • Page 8 DANGER Follow these precautions to prevent personal injury during use and maintenance of this equipment: • It is the responsibility of the equipment owner to perform a Personal Protective Equipment Hazard Assessment to ensure adequate protection during maintenance procedures. • Do Not Store Or Use Gasoline Or Other Flammable Vapors Or Liquids In The Vicinity Of This Or Any Other...

  • Page 9: Table Of Contents

    Table of Contents General Information Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 How to Read a Model Number .
  • Page 10 Operation Sequence of Operation UDP0140/UDP0240/ UDP0310 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 Touch Pad Features .
  • Page 11 Troubleshooting Troubleshooting UDP0140/UDP0240/UDP0310 . .75 Problem Checklist . . . . . . . . . . . . . . . . . . . . . . .75 Control Board Test Mode .
  • Page 12 Troubleshooting UDP0080 . . . . . . . . . . . . . . . . . . .107 Safety Limit Feature .
  • Page 13 Component Check Procedures Main Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . .131 Bin Switch UDP0080/UDP0140/UDP0240/UDP0310 .
  • Page 14 Charts Cycle Times, 24 Hr. Ice Production and Refrigerant Temperature Charts . . . . . . . . . . . . . . . . . . . . . . . .157 UDP0080 Self-contained Air-cooled .

  • Page 15: General Information

    General Information Model Numbers This manual covers the following models: Self-contained Air-cooled UDP0080A UDP0140A UDP0240A UDP0310A How to Read a Model Number Cube Size Capacity Condenser Series Type U D P 0140 A E Refrigerant E - WRAS 50Hz E - R290 F - R404A P - R134A R - Regular Blank - Not...

  • Page 16: Model/Serial Number Location

    Model/Serial Number Location These numbers are required when requesting information from your local Manitowoc Distributor, Service Representative, or Manitowoc Ice. The model/serial number data plate is located in the evaporator compartment and on the back of the ice machine. Part Number STH098 06/19...

  • Page 17: Warranty

    Warranty For warranty information visit: www.manitowocice.com/Service/Warranty • Warranty Coverage Information • Warranty Registration • Warranty Verification Warranty coverage begins the day the ice machine is installed. WARRANTY REGISTRATION Completing the warranty registration process is a quick and easy way to protect your investment. Scan the QR code with your smart device or enter the link in a web browser to complete your warranty registration.
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  • Page 19: Installation

    Installation 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 indoors. • The location must be free of airborne and other contaminants.

  • Page 20: Ice Machine Clearance Requirements

    Ice Machine Clearance Requirements Self-contained Air-cooled Top/Sides 5" (127 mm)* Back 5" (127 mm)* *The ice machine may be built into a cabinet. Ice Machine Heat of Rejection Series Heat of Rejection* Ice Machine Air Conditioning** Peak UDP0080 1750 2600 UDP0140 2400 2900...

  • Page 21: Leveling The Ice Machine

    Leveling the Ice Machine 1. Screw the legs onto the bottom of the ice machine. 2. Screw the foot of each leg in as far as possible. Caution The legs must be screwed in tightly to prevent them from bending. 3.

  • Page 22: Electrical Requirements

    Electrical Requirements Voltage The maximum allowable voltage variation is ±10% of the rated voltage on the ice machine model/serial number plate at start-up (when the electrical load is highest). Fuse/Circuit Breaker A separate fuse/circuit breaker must be provided for each ice machine.

  • Page 23: Electrical Specifications

    Electrical Specifications Air-cooled Ice Machine Voltage Phase Max. Fuse/ Ice Machine Total Amps Cycle Circuit Breaker UDP0080 230/1/50 2.81 UDP0140 230/1/50 2.63 UDP0240 230/1/50 3.45 UDP0310 230/1/50 5.65 NOTE: Model/serial plate information overrides all data listed in this chart. Warning All wiring must conform to local, and national codes.

  • Page 24: Water Service/Drains

    Water Service/Drains WATER SUPPLY Local water conditions may require treatment of the water to inhibit scale formation, filter sediment, and remove chlorine odor and taste. Importar If you are installing a Manitowoc water filter system, refer to the Installation Instructions supplied with the filter system for ice making water inlet connections.
  • Page 25 Drain Connections Follow these guidelines when installing drain lines to prevent drain water from flowing back into the ice machine and storage bin: • Drain lines must have a 1.5-inch drop per 5 feet of run (2.5 cm per meter), and must not create traps. •...
  • Page 26 Water Supply and Drain Line Sizing/Connections Part Number STH098 06/19...

  • Page 27: Maintenance

    Maintenance Interior Cleaning and Sanitizing General Descale and sanitize the ice machine every six months for efficient operation. If the ice machine requires more frequent descaling and sanitizing, consult a qualified service company to test the water quality and recommend appropriate water treatment.
  • Page 28 Touch Pad Operation Pressing and holding the clean button for 3 seconds starts the cycle. The Clean & On/Off lights energize indicating the cycle has started and ice making will automatically start when the cycle is complete. • Setting the ice machine to stop after the cycle: Press the On/Off button.
  • Page 29 Caution Do not mix Ice Machine Cleaner/Descaler and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling. To start a descaling cycle, select Clean. Water Step 3 will flow through the water dump valve and down the drain.
  • Page 30 Mix a solution of cleaner/descaler and warm Step 5 water. Depending on the amount of mineral buildup, a larger quantity of solution may be required. Use the ratio in the table below to mix enough solution to thoroughly descale all parts. Solution Type Water Mixed with...
  • Page 31 Mix a solution of sanitizer and warm water. Step 7 Solution Type Water Mixed With Sanitizer 3 gal. (12 l) 2 oz (60 ml) sanitizer part number 9405653 Use half of the sanitizer/water solution to sanitize all removed components. Use a spray bottle to liberally apply the solution to all surfaces of the removed parts or soak the removed parts in the sanitizer/water solution.
  • Page 32 Remove Parts for Descaling Warning Disconnect electric power to the ice machine at the electric switch box before proceeding. 1. Remove the Harvest Float Switch and Ice Thickness Float Switch • Pull forward on the bottom of the bracket until clear of the tab, then slide bracket upward to remove the bracket and float as an assembly.
  • Page 33 WIRE CONNECTORS ARE LOCATED BEHIND BULKHEAD PULL THROUGH GROMMET TO DISCONNECT HARVEST FLOAT ICE THICKNESS FLOAT SWITCH & BRACKET SWITCH & BRACKET DISCONNECT WIRES FOR COMPLETE REMOVAL Caution Do not disassemble float for descaling - Incorrect reassembly will result in an ice machine that will not harvest.
  • Page 34 2. Remove the Water Trough Thermistor and Water Trough • Remove the upper thumbscrew. • While supporting the water trough remove the thumbscrew and thermistor. • While supporting the water trough remove the lower thumbscrew from beneath the water trough. •...
  • Page 35 3. Remove the Ice Damper • Remove thumbscrew from bin switch cover. • Support ice damper and then pull bin switch cover and ice damper forward to remove. 1. REMOVE THUMBSCREW 2. SUPPORT ICE DAMPER THEN SLIDE RIGHT SIDE FORWARD TO REMOVE Part Number STH098 06/19...
  • Page 36 4. Remove the Water Distribution Tube • Distribution tube thumbscrews are retained to prevent loss. Loosen thumbscrews but do not pull thumbscrews out of distribution tube. • Loosen the two outer screws and pull forward on the distribution tube to release. NOTE: For ease of assembly when reinstalling the water distribution tube, install the top edge first.

  • Page 37: Remedial Cleaning

    REMEDIAL CLEANING This procedure can be performed between the bi-annual detailed descaling and sanitizing cycles. This procedure does not require removing the ice from the bin. Press the On/Off button after ice falls from the Step 1 evaporator at the end of a Harvest cycle. Or, press the On/ Off button and allow the ice to melt off the evaporator.
  • Page 38 Ice Machine Inspection Check all water fittings and lines for leaks. Also, make sure the refrigeration tubing is not rubbing or vibrating against other tubing, panels, etc. Do not put anything (boxes, etc.) in front of the ice machine. There must be adequate airflow through and around the ice machine to maximize ice production and ensure long component life.

  • Page 39: Cleaning The Condenser

    CLEANING THE CONDENSER General Warning Disconnect electric power to the ice machine head section and the remote condensing unit at the electric service switches before cleaning the condenser. A dirty condenser restricts airflow, resulting in excessively high operating temperatures. This reduces ice production and shortens component life.

  • Page 40: Removal From Service/Winterization

    REMOVAL FROM SERVICE/WINTERIZATION Self-contained Air-cooled ice machines 1. Descale and sanitize the ice machine. 2. Press the On/Off button to turn off the ice machine. 3. Turn off the water supply, disconnect and drain the incoming ice-making water line at the rear of the ice machine and drain the water trough.

  • Page 41: Bin Removal

    BIN REMOVAL UDP0140/UDP0240/UDP0310 1. Disconnect power. 2. Remove all ice from bin. 3. Remove air filter and louver from lower front of machine. 4. Loosen screws and rotate clips to release bin from base. 5. Disconnect clamp and remove bin drain. 6.

  • Page 42: Detailed Descaling And Sanitizing Procedure

    Detailed Descaling and Sanitizing Procedure UDP0080 Ice machine cleaner/descaler is used to remove lime scale and mineral deposits. Ice machine sanitizer disinfects and removes algae and slime. Move the toggle switch to Off after ice falls Step 1 from the evaporator at the end of a Harvest cycle. Or, set the toggle switch to Off and allow the ice to melt off the evaporator.
  • Page 43 Wait until the cycle is complete (approximately Step 5 22 minutes) then place the toggle switch in the Off position and disconnect power and water supplies to the ice machine. Warning Disconnect electric power to the ice machine at the electric switch box before proceeding.
  • Page 44 Remove the Ice Thickness Probe • Compress the side of the ice thickness probe near the top hinge pin and remove it from the bracket. NOTE: At this point, the ice thickness probe can easily be descaled. If complete removal is desired follow the ice thickness probe wire to the bulkhead grommet (exit point) in the back wall.
  • Page 45 Remove the Water Distribution Tube • Loosen the two thumbscrews, which secure the distribution tube. • Lift the distribution tube up off the thumbscrews. Disassembly • Twist the barbed end until the tab lines up with the key way. • Pull the inner tube end outward Part Number STH098 06/19...
  • Page 46 Remove the Float Valve • Turn the splash shield counterclockwise one or two turns. • Pull the float valve forward and off the mounting bracket. • Disconnect the water inlet tube from the float valve at the compression fitting. • Remove the cap and filter screen for descaling.
  • Page 47 Remove the Water Trough • Apply downward pressure on the siphon tube and remove from the bottom of the water trough. • Remove the upper thumbscrew. • While supporting the water trough remove the two thumbscrews from beneath the water trough. •...
  • Page 48 Remove the ice damper. • Grasp left side of ice damper and apply pressure against the right-hand ice damper mounting bracket. • Pull forward on the ice damper until the left hand mounting pin disengages. Installation • Grasp the right side of ice damper and place left hand pin in the mounting bracket.
  • Page 49 Remove the Bin Door • Grasp the rear of the bin door and pull bin door forward approximately 5”. • Slide bin door to the rear while applying upward pressure (The rear door pins will ride up into the track slot and slide backward to the stop tab).
  • Page 50 Mix a solution of cleaner/descaler and warm Step 7 water. Depending on the amount of mineral buildup, a larger quantity of solution may be required. Use the ratio in the table below to mix enough solution to thoroughly descale all parts. Solution Type Water Mixed with...
  • Page 51 Use 1/2 of the sanitizer/water solution to Step 11 sanitize all removed components. Use a cloth or sponge to liberally apply the solution to all surfaces of the removed parts or soak the removed parts in the sanitizer/water solution. Do not rinse parts after sanitizing. Use 1/2 of the sanitizer/water solution to Step 12 sanitize all foodzone surfaces of the ice machine and bin.
  • Page 52 Mix a solution of sanitizer and warm water. Step 18 Solution Type Water Mixed With Sanitizer 6 gal. (23 l) 4 oz (120 ml) sanitizer part number 9405653 Use 1/2 of the sanitizer/water solution to Step 19 sanitize all removed components. Use a cloth or sponge to liberally apply the solution to all surfaces of the removed parts or soak the removed parts in the sanitizer/water solution.

  • Page 53: Cleaning The Condenser

    CLEANING THE CONDENSER A dirty condenser restricts airflow, resulting in excessively high operating temperatures. This reduces ice production and shortens component life. Clean the condenser at least every six months. Follow the steps below. 1. The washable aluminum filter on self-contained ice machines is designed to catch dust, dirt, lint and grease.

  • Page 54: Removal From Service/Winterization

    REMOVAL FROM SERVICE/WINTERIZATION Self-contained Air-cooled ice machines 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 320F (00C) or below. 1. Disconnect the electric power at the circuit breaker or the electric service switch.

  • Page 55: Sequence Of Operation Udp0140/Udp0240

    Operation Sequence of Operation UDP0140/UDP0240/ UDP0310 TOUCH PAD FEATURES The touch pad offers a series of pressure sensitive buttons to control ice machine operation and provide operational status. On/Off - Blue = Machine On Off = Machine Is Off Delay - Blue = Delay Mode On Off = Delay Mode Is Off Clean - Yellow = Clean Cycle On Off = Cleaning is Off...
  • Page 56 On/Off The On/Off Button is used to start and stop ice making. The blue light indicates whether the ice machine is in Ice Making (light on) or Off (light off). NOTE: Stopping and restarting a freeze cycle with ice on the evaporator will result in a thick bridge and larger than normal cubes;...
  • Page 57 Clean Pressing the Clean button for 3 seconds will start a clean cycle. After the clean cycle is complete, the ice machine will automatically start an ice making cycle. • Pressing the Clean button again within 45 seconds of the clean cycle starting will abort the clean cycle. •...

  • Page 58: Ice Making Sequence Of Operation

    Ice Making Sequence of Operation SEQUENCE OF OPERATION The On/Off button must be depressed and the ice damper must be closed before the ice machine will start. The following is the primary sequence of operation. Initial Start-up From Shutoff The dump valve energizes to purge any water in the water trough down the drain.
  • Page 59 Full Bin Cycle If the ice damper is held open by ice cubes the ice machine shuts off. When the ice damper closes the ice machine starts a new cycle at Initial Start-up From Shutoff. The ice machine will remain off for a 3 minute delay period. Thaw Cycle The maximum harvest time is a total of 7 minutes.

  • Page 60: Control Board Timers

    CONTROL BOARD TIMERS • The ice machine is locked into the freeze cycle for 6 minutes before a harvest cycle can be initiated. • The freeze time lock in feature is bypassed on the initial cycle (manual start or after a full bin/safety limit condition).

  • Page 61: Safety Limits

    SAFETY LIMITS Safety limits are stored and indicated by the control board. The number of cycles required to stop the ice machine varies for each safety limit. Safety limits can be reset by pressing the On/Off button and starting a new ice making cycle. A safety limit shutdown is indicated by the red Service light on the touch pad.
  • Page 62 Safety Limit 3 If the freeze time reaches 4 minutes and water is not sensed (float remains down for 10 continuous seconds) the ice machine stops. • Safety Limit 3 is bypassed on the initial cycle (manual start or after a full bin/safety limit condition). For all subsequent cycles if the freeze time reaches 4 minutes and water is not sensed, the ice machine stops and initiates a 30 minute delay period.

  • Page 63: Chart

    Part Number STH098 06/19...
  • Page 64 Part Number STH098 06/19...

  • Page 65: Operational Checks

    Operational Checks ICE THICKNESS CHECK After a harvest cycle, inspect the ice cubes in the ice storage bin. The ice bridge connects the ice cubes and must be set to maintain an ice bridge thickness of 1/8" (3.2 mm). To adjust the thickness of the bridge refer to ice thickness adjustment.

  • Page 66: Minimum/Maximum Slab Weight

    MINIMUM/MAXIMUM SLAB WEIGHT Minimum Maximum Model Ice Weight Per Cycle Ice Weight Per Cycle Grams Grams UDP0140 480 grams 540 grams UDP0240 1107 grams 1247grams UDP0310 1107 grams 1247 grams Part Number STH098 06/19...

  • Page 67: Sequence Of Operation Udp0080

    Sequence of Operation UDP0080 Initial start-up or start-up after automatic shut-off 1. Pressure Equalization Before the compressor starts the hot gas valve is energized for 15 seconds to equalize pressures during the initial refrigeration system start-up. 2. Refrigeration System Start-up The compressor starts after the 15-second pressure equalization, and remains on throughout the entire Freeze and Harvest Sequences.
  • Page 68 5. Harvest The water pump de-energizes stopping flow over the evaporator. The rising level of water in the sump trough diverts water out of the overflow tube, purging excess minerals from the sump trough. The hot gas valve also opens to divert hot refrigerant gas into the evaporator. The refrigerant gas warms the evaporator causing the cubes to slide, as a sheet, off the evaporator and into the storage bin.

  • Page 69: Udp0080 Energized Parts Chart

    Part Number STH098 06/19...
  • Page 70 Part Number STH098 06/19...

  • Page 71: Operational Checks Udp0080

    Operational Checks UDP0080 SIPHON SYSTEM To reduce mineral build-up and cleaning frequency, the water in the sump trough must be purged during each harvest cycle. When the water pump de-energizes the level in the water trough rises above the standpipe starting a siphon action. The siphon action stops when the water level in the sump trough drops.

  • Page 72: Water Level Check

    WATER LEVEL CHECK The float valve is factory-set for the proper water level. If adjustments are necessary: 1. Verify the ice machine is level. 2. Remove the siphon cap from the standpipe. 3. Place the main ON/OFF/WASH toggle switch to the ON position, and wait until the float valve stops adding water.

  • Page 73: Ice Thickness Check

    ICE THICKNESS CHECK After a harvest cycle, inspect the ice cubes in the ice storage bin. The ice thickness probe is set to maintain an ice bridge of 1/8” (3.2 mm). If an adjustment is needed, follow the steps below. 1.
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  • Page 75: Troubleshooting

    Troubleshooting Troubleshooting UDP0140/UDP0240/UDP0310 NOTE: Refer to “Troubleshooting UDP0080” on page 107 for these models. PROBLEM CHECKLIST Problem Possible Cause Correction No electrical power to Replace the fuse/reset the the ice machine. breaker/turn on the main switch/plug power cord into receptacle. Ice machine does Ice machine needs to Press the On/Off button to...
  • Page 76 Problem Possible Cause Correction The six-minute freeze Wait for freeze lock-in to time lock-in has not expire. expired yet. Harvest float switch Descale and sanitize the ice Ice machine does is dirty. machine. not cycle into Harvest float switch Connect the wire wire is disconnected.
  • Page 77 Problem Possible Cause Correction Water trough level is Adjust ice thickness float too high Power button was Allow ice to thaw turned off/on during and release from the the freeze cycle and evaporator, then restart ice remained on the evaporator Ice sheet is thick Ice damper was opened Allow ice to thaw...

  • Page 78: Control Board Test Mode

    CONTROL BOARD TEST MODE NOTE: The ice damper/bin switch can be open or closed and does not effect the operation of the test mode. To enter the test mode press and hold the test switch on the control board for 3 seconds. Refer to “Electronic Control Board UDP0140/UDP0240/UDP0310”...

  • Page 79: Safety Limit Feature

    SAFETY LIMIT FEATURE In addition to the standard safety controls, your Manitowoc ice machine features built-in safety limits that will stop the ice machine if conditions arise which could cause a major component failure. Service Light: The Service light energizes whenever a safety limit has been exceeded.
  • Page 80 Safety Limit 3 If the freeze time reaches 4 minutes and water is not sensed (float remains down for 10 continuous seconds) the ice machine stops. • Safety Limit 3 is bypassed on the initial cycle (manual start or after a full bin/safety limit condition). For all subsequent cycles if the freeze time reaches 4 minutes and water is not sensed, the ice machine stops and initiates a 30 minute delay period.
  • Page 81 Determining Which Safety Limit Stopped the Ice Machine: When a safety limit condition causes the ice machine to stop, the safety limit light on the control board continually flashes on and off. CONTROL BOARD SAFETY LIMIT LIGHT OPERATION, BEFORE THE POWER BUTTON HAS BEEN CYCLED ON/ OFF: Watch the safety limit lights on the control board: •...
  • Page 82 Safety Limit Checklist The following checklists are designed to assist the service technician in analysis. However, because there are many possible external problems, do not limit your diagnosis to only the items listed. Safety Limit #1 Freeze time exceeds 45 minutes for 3 consecutive freeze cycles.
  • Page 83 Refrigeration System • Non-Manitowoc components • Improper refrigerant charge • Defective compressor • TXV starving or flooding (check bulb mounting) • Non-condensible in refrigeration system • Plugged or restricted high side refrigerant lines or component • Defective harvest valve Part Number STH098 06/19...
  • Page 84 Safety Limit #2 Harvest time exceeds 3.5 minutes for 3 Consecutive harvest cycles. Possible Cause Checklist Improper installation • Refer to “Installation/Visual Inspection Checklist” on page 93 Water System • Water area (evaporator) dirty • Dirty/defective water dump valve • Vent tube not installed on water outlet drain •...
  • Page 85 Safety Limit 3 Freeze time reaches 4 minutes and water is not sensed. Possible Cause Checklist Improper installation • Refer to “Installation/Visual Inspection Checklist” on page 93 Water System • Dirty/defective water dump valve • Low water float valve dirty or defective •...

  • Page 86: Diagnosing An Ice Machine That Will Not Run

    DIAGNOSING AN ICE MACHINE THAT WILL NOT RUN Warning High (line) voltage is applied to the control board at all times. Removing the control board fuse or pressing the power button will not remove the power supplied to the control board. 1.

  • Page 87: Ice Machine Does Not Cycle Into Harvest When

    ICE MACHINE DOES NOT CYCLE INTO HARVEST WHEN THE HARVEST FLOAT IS DOWN/CLOSED NOTE: The ice machine will make a thick or double slab when a new freeze cycle is started with ice already present on the evaporator. Two of the most common scenarios are: •...
  • Page 88 Disconnect power to the ice machine, remove Step 1 the electrical panel to allow viewing of the control board lights and pull the wire connector for the harvest float switch through the bulkhead and disconnect. Attach a jumper wire to the wire terminals connected to the control board.

  • Page 89: Ice Machine Cycles Into Harvest Before The Harvest Float Is Down/Closed

    ICE MACHINE CYCLES INTO HARVEST BEFORE THE HARVEST FLOAT IS DOWN/CLOSED Disconnect power to the ice machine, remove Step 1 the electrical panel to allow viewing of the control board lights and pull the wire connector for the harvest float switch through the bulkhead and disconnect.
  • Page 90 Reapply power and press the power button to Step 2 cycle the ice machine off/on and bypass the freeze time lock-in feature. Wait until water flows over the evaporator, then refer to chart. Result Correction The harvest light does not come on The ice thickness float and the ice machine stays in freeze.

  • Page 91: Ice Production Check

    ICE PRODUCTION CHECK The amount of ice a machine produces directly relates to the operating water and air temperatures. This means an ice machine with a 70°F (21°C) ambient temperature and 50°F (10°C) water produces more ice than the same ice machine with 90°F (32°C) ambient and 70°F (21°C) water.
  • Page 92 Weighing the ice is the only 100% accurate check. 4. Compare the results of step 3 with step 2. Ice production is normal when these numbers match closely. If they match closely, determine if: • Another larger ice machine is required. •...

  • Page 93: Installation/Visual Inspection Checklist

    INSTALLATION/VISUAL INSPECTION CHECKLIST Ice machine is not level • Level the ice machine Condenser is dirty • Clean the condenser Water filtration is plugged (if used) • Install a new water filter Water drains are not run separately and/or are not vented •...

  • Page 94: Water System Checklist

    WATER SYSTEM CHECKLIST A water-related problem often causes the same symptoms as a refrigeration system component malfunction. Example: A water dump valve leaking during the freeze cycle, a system low on charge, and a starving TXV have similar symptoms. Water system problems must be identified and eliminated prior to replacing refrigeration components.
  • Page 95 Extremely Thin at Evaporator Outlet There is no ice, or a considerable lack of ice formation on the outlet of the evaporator. Examples: No ice at all at the outlet of the evaporator, but ice forms at the inlet half of the evaporator. Or, the ice at the outlet of the evaporator reaches the correct thickness, but the outlet of the evaporator already has 1/2”...

  • Page 96: Refrigeration Diagnostics

    Refrigeration Diagnostics These ice machines have a very small refrigerant charge and we do not recommend diagnosing the ice machine using refrigerant pressures. For this reason refrigeration access fittings are not installed during production and the ice machine is diagnosed with temperatures. ELIMINATE ALL NON REFRIGERATION PROBLEMS BEFORE DIAGNOSING THE REFRIGERATION SYSTEM.

  • Page 97: Ice Formation Pattern

    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 Refrigeration System Operational Analysis Table, it can help diagnose an ice machine malfunction.

  • Page 98: Discharge Line Temperature Analysis

    DISCHARGE LINE TEMPERATURE ANALYSIS Knowing if the discharge line temperature is increasing, decreasing or remaining constant can be an important diagnostic tool. Maximum compressor discharge line temperature on a normally operating ice machine steadily increases throughout the freeze cycle. Comparing the temperatures over several cycles will result in a consistent maximum discharge line temperature.

  • Page 99: Comparing Evaporator Inlet/Outlet

    COMPARING EVAPORATOR INLET/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 Refrigeration System Operational Analysis Table, can help diagnose an ice machine malfunction.

  • Page 100: Refrigeration Diagnostic Procedure

    REFRIGERATION DIAGNOSTIC PROCEDURE 1. Install and insulate a temperature lead on the compressor suction line within 6” of the compressor. 2. Install and insulate a temperature lead on the compressor discharge line within 6” of the compressor. 3. All doors and panels must be in place during the diagnostic procedure.

  • Page 101: Flooding Expansion Valve Symptoms

    FLOODING EXPANSION VALVE SYMPTOMS A flooding expansion valve will have discharge and suction line temperatures 20°F (-7°C) lower than normal freeze cycle temperatures. Normal suction line temperature and low discharge line temperature DO NOT verify a flooding valve. Both discharge line temperature and suction line temperature must be low to verify a flooding expansion valve.

  • Page 102: Overcharged System Symptoms

    OVERCHARGED SYSTEM SYMPTOMS Suction line temperature will be slightly low during freeze cycle 5°F (-15°C). Discharge line temperature is normal. Actual amperage readings will be higher than nameplate rating. Overcharge diagnosis can be difficult. R290 ice machines ship without access valves; Look for signs that an access valve has previously been added.

  • Page 103: Harvest Valve

    HARVEST VALVE General The harvest valve is an electrically operated valve that opens when energized, and closes when de-energized. Normal Operation The valve is de-energized (closed) during the freeze cycle and energized (open) during the harvest cycle. The valve is positioned between the receiver and the evaporator and performs two functions: 1.
  • Page 104 Harvest Valve Analysis The valve can fail in two positions: • Valve will not open in the harvest cycle. • Valve remains open during the freeze cycle. VALVE WILL NOT OPEN IN THE HARVEST CYCLE Although the circuit board has initiated a harvest cycle, the evaporator temperature remains unchanged from the freeze cycle.
  • Page 105 Use the following procedure and table to help determine if a harvest valve is remaining partially open during the freeze cycle. 1. Wait eight minutes into the freeze cycle. 2. Feel the inlet of the harvest valve or attach thermocouple and insulate. Ipprttat Feeling the harvest valve outlet or across the harvest valve itself will not work for this comparison.
  • Page 106 Findings Comments The inlet of the harvest valve This is normal as the discharge is cool enough to touch and line should always be too hot to the compressor discharge touch and the harvest valve inlet, line is hot. although too hot to touch during harvest, should be cool enough to touch after 5 minutes into the Cppl &...

  • Page 107: Troubleshooting Udp0080

    Troubleshooting UDP0080 SAFETY LIMIT FEATURE In addition to the standard safety controls, your Manitowoc ice machine features built-in safety limits that will stop the ice machine if conditions arise which could cause a major component failure. Safety Limit #1: If the freeze time reaches 60 minutes, the control board automatically initiates a harvest cycle.
  • Page 108 Determining Which Safety Limit Stopped the Ice Machine: When a safety limit condition causes the ice machine to stop, the harvest light on the control board continually flashes on and off. Use the following procedures to determine which safety limit has stopped the ice machine. 1.
  • Page 109 Safety Limit Checklist The following checklists are designed to assist the service technician in analysis. However, because there are many possible external problems, do not limit your diagnosis to only the items listed. Safety Limit #1 Freeze time exceeds 60 minutes for 6 consecutive freeze cycles.
  • Page 110 Refrigeration System • Non-Manitowoc components • Improper refrigerant charge • Defective compressor • TXV starving or flooding (check bulb mounting) • Non-condensible in refrigeration system • Plugged or restricted high side refrigerant lines or component • Defective harvest valve Part Number STH098 06/19...
  • Page 111 Safety Limit #2 Harvest time exceeds 3.5 minutes for 3 Consecutive harvest cycles. Possible Cause Checklist Improper installation • Refer to “Installation/Visual Inspection Checklist” on page 117 Water System • Water area (evaporator) dirty • Dirty/defective water dump valve • Vent tube not installed on water outlet drain •...

  • Page 112: Diagnosing An Ice Machine That Will Not Run

    DIAGNOSING AN ICE MACHINE THAT WILL NOT RUN Warning High (line) voltage is applied to the control board (terminals #2 and #4) at all times. Removing control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board. 1.

  • Page 113: Diagnosing Ice Thickness Control Circuitry

    DIAGNOSING ICE THICKNESS CONTROL CIRCUITRY Ice Machine Does Not Cycle Into Harvest when Water Contacts the Ice Thickness Control Probe Bypass the freeze time lock-in feature by Step 1 moving the ON/OFF/WASH switch to OFF and back to ON. Wait until the water starts to flow over the evaporator. Clip the jumper wire to the ice thickness probe Step 2 and any cabinet ground.
  • Page 114 Ice Machine Cycles Into Harvest Before Water Contact with the Ice Thickness Probe Bypass the freeze time lock-in feature by Step 1 moving the ON/OFF/WASH switch to OFF and back to ON. Wait until the water starts to flow over the evaporator, then monitor the harvest light.

  • Page 115: Ice Production Check

    ICE PRODUCTION CHECK The amount of ice a machine produces directly relates to the operating water and air temperatures. This means an ice machine with a 70°F (21°C) ambient temperature and 50°F (10°C) water produces more ice than the same ice machine with 90°F (32°C) ambient and 70°F (21°C) water.
  • Page 116 3. Perform an ice production check using the formula below. Freeze Harvest Total Cycle Time Time Time 1440 ÷ Minutes Total Cycle Cycles per Day in 24 Hrs. Time Weight Cycles per Actual of One 24-Hour Harvest Production Weighing the ice is the only 100% accurate check. 4.

  • Page 117: Installation/Visual Inspection Checklist

    INSTALLATION/VISUAL INSPECTION CHECKLIST Ice machine is not level • Level the ice machine Condenser is dirty • Clean the condenser Water filtration is plugged (if used) • Install a new water filter Water drains are not run separately and/or are not vented •...

  • Page 118: Water System Checklist

    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 • Descale as needed Water inlet pressure not between 20 and 80 psig (1–5 bar, 138–552 kPa) •...

  • Page 119: Udp0080 Refrigeration Diagnostics

    UDP0080 Refrigeration Diagnostics ELIMINATE ALL NON REFRIGERATION PROBLEMS BEFORE DIAGNOSING THE REFRIGERATION SYSTEM Perform the procedures on the preceding pages before performing refrigeration diagnostics. The first pages cover an overview of the diagnostic procedures followed by diagnostics checklists. • Perform a visual inspection for clearances, drains, dirty condenser/filter and water filter replacement.

  • Page 120: Analyzing Ice Formation Pattern

    ANALYZING 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 Refrigeration System Operational Analysis Table, it can help diagnose an ice machine malfunction.
  • Page 121 Extremely Thin at Evaporator Outlet There is no ice, or a considerable lack of ice formation on the outlet of the evaporator. Examples: No ice at all at the outlet of the evaporator, but ice forms at the inlet half of the evaporator. Or, the ice at the outlet of the evaporator reaches the correct thickness, but the inlet of the evaporator already has 1/2”...

  • Page 122: Discharge Line Temperature Analysis

    DISCHARGE LINE TEMPERATURE ANALYSIS Knowing if the discharge line temperature is increasing, decreasing or remaining constant can be an important diagnostic tool. Maximum compressor discharge line temperature on a normally operating ice machine steadily increases throughout the freeze cycle. Comparing the temperatures over several cycles will result in a consistent maximum discharge line temperature.

  • Page 123: Comparing Evaporator Inlet/Outlet

    COMPARING EVAPORATOR INLET/OUTLET TEMPERATURES The temperatures of the suction line entering and leaving the evaporator alone cannot diagnose an ice machine. However, comparing these temperatures during the freeze cycle can help diagnose an ice machine malfunction. The actual temperatures entering and leaving the evaporator vary by model, and change throughout the freeze cycle.

  • Page 124: Refrigeration Diagnostic Procedure

    REFRIGERATION DIAGNOSTIC PROCEDURE 1. Install and insulate a temperature lead on the compressor suction line within 6” of the compressor. 2. Install and insulate a temperature lead on the compressor discharge line within 6” of the compressor. 3. All doors and panels must be in place during the diagnostic procedure.

  • Page 125: Flooding Expansion Valve Symptoms

    FLOODING EXPANSION VALVE SYMPTOMS A flooding expansion valve will have discharge and suction line temperatures 20°F (-7°C) lower than normal freeze cycle temperatures. Normal suction line temperature and low discharge line temperature DO NOT verify a flooding valve. Both discharge line temperature and suction line temperature must be low to verify a flooding expansion valve.

  • Page 126: Overcharged System Symptoms

    OVERCHARGED SYSTEM SYMPTOMS Suction line temperature will be slightly low during freeze cycle 5°F (-15°C). Discharge line temperature is normal. Actual amperage readings will be higher than nameplate rating. Overcharge diagnosis can be difficult. R290 ice machines ship without access valves; Look for signs that an access valve has previously been added.

  • Page 127: Harvest Valve

    HARVEST VALVE General The harvest valve is an electrically operated valve that opens when energized, and closes when de-energized. Normal Operation The valve is de-energized (closed) during the freeze cycle and energized (open) during the harvest cycle. The valve is positioned between the receiver and the evaporator and performs two functions: 1.
  • Page 128 Harvest Valve Analysis The valve can fail in two positions: • Valve will not open in the harvest cycle. • Valve remains open during the freeze cycle. VALVE WILL NOT OPEN IN THE HARVEST CYCLE Although the circuit board has initiated a harvest cycle, the evaporator temperature remains unchanged from the freeze cycle.
  • Page 129 Use the following procedure and table to help determine if a harvest valve is remaining partially open during the freeze cycle. 1. Wait eight minutes into the freeze cycle. 2. Feel the inlet of the harvest valve or attach thermocouple and insulate. Ipprttat Feeling the harvest valve outlet or across the harvest valve itself will not work for this comparison.
  • Page 130 Findings Comments The inlet of the harvest valve This is normal as the discharge is cool enough to touch and line should always be too hot to the compressor discharge touch and the harvest valve inlet, line is hot. although too hot to touch during harvest, should be cool enough to touch after 5 minutes into the Cppl &...

  • Page 131: Component Check Procedures

    Component Check Procedures MAIN FUSE Function The control board fuse stops ice machine operation if electrical components fail causing high amp draw. Specifications • UDP0080/UDP0140/UDP0240/UDP0310 - 250 Volt, 10 amp. Warning High (line) voltage is applied to the control board at all times.

  • Page 132: Bin Switch

    BIN SWITCH UDP0080/UDP0140/UDP0240/UDP0310 Function Bin switch operation is controlled by the movement of the ice damper. 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 7 seconds of opening during the harvest cycle.
  • Page 133 Check Procedure 1. Press the power button to OFF. 2. Watch the curtain light on the control board. 3. Move the ice damper upward, toward the evaporator. The bin switch must close. The curtain light “on” indicates the bin switch has closed properly. 4.

  • Page 134: Touch Pad

    TOUCH PAD UDP0140/UDP0240/UDP0310 Function User interface to select ice making, delay start or cleaning cycle and provides feedback on ice machine operation. Check For Normal Operation Action Normal Function Press and hold the control All Touch Pad lights turn on board test button for 3 seconds Press test button All Touch Pad lights turn off...
  • Page 135 Ohm Test Disconnect power from ice machine. Disconnect wire from control board and Ohm touch pad and interconnecting wire to verify correct operation. Pressing and depressing the touch pad must open and close the circuit. A switch that functions correctly will close as the button is pressed and open as the button is released.

  • Page 136: Float Switch Udp0140/Udp0240/Udp0310

    FLOAT SWITCH UDP0140/UDP0240/UDP0310 Function Open and close to indicate to the control board the level of water in the water trough. Specifications Normally closed, float operated magnetic reed switch. The float switch contacts are closed in the down position. When water raises the float to the up position the magnet in the float opens the contacts.
  • Page 137 Ice Thickness Float Switch: The light must be off in the down position. The light must be on in the up position. If the control board light does not respond to the float proceed with step 1 below. 1. Disconnect power to the ice machine, pull the wire connector for the float switch through the bulkhead and disconnect.

  • Page 138: Water Trough Thermistor

    WATER TROUGH THERMISTOR UDP0140/UDP0240/UDP0310 Function Thermistor resistance values change with temperature. The value supplied to the control board is used to identify temperature at the thermistor location. When the resistance value indicates a temperature of 34°F (1.1°C) the control board will delay the water pump for 25 seconds.
  • Page 139 THERMISTOR CHART Importar If the ohmmeter reads “OL,” check the scale setting on the meter before assuming the thermistor is bad. Temperature of Thermistor Resistance °C °F K Ohms (x1000) -7 - -1.0 19 - 30 47.06 - 34.36 32.65 31.82 33.8 31.03...

  • Page 140: On/Off/Wash Toggle Switch

    ON/OFF/WASH TOGGLE SWITCH UDP0080 FUNCTION The switch is used to place the ice machine in ON, OFF or WASH mode of operation. SPECIFICATIONS Single-pole, double-throw switch. The switch is connected into a varying low D.C. voltage circuit. CHECK PROCEDURE NOTE: Because of a wide variation in D.C. voltage, it is not recommended that a voltmeter be used to check toggle switch operation.

  • Page 141: Fan Cycle Control Udp0080/Udp0140/Udp0240/Udp0310

    FAN CYCLE CONTROL UDP0080/UDP0140/UDP0240/UDP0310 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 Model Cut-In (Close) Cut-Out (Open) UDP0080 UPD0140 200 psig ±5...

  • Page 142: High Pressure Cutout (Hpco) Control Udp0080 /Udp0140/Udp0240/Udp0310

    HIGH PRESSURE CUTOUT (HPCO) CONTROL UDP0080 /UDP0140/UDP0240/UDP0310 Function Stops the ice machine if subjected to excessive high-side pressure. The HPCO control is normally closed, and opens on a rise in discharge pressure. Specifications Cut-out: 350 psig ±10 Cut-in: Automatic reset (Must be below 250 psig to reset) Check Procedure 1.

  • Page 143: Compressor Electrical Diagnostics

    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 ensure that the overload is closed and the resistance readings will be accurate.
  • Page 144 Compressor Drawing Locked Rotor The two likely causes of this are: • Defective starting component • Mechanically seized compressor To determine which you have: 1. Install high and low side gauge. 2. Try to start the compressor. 3. Watch the pressures closely. •...

  • Page 145: Filter-Driers

    Filter-Driers Liquid Line Filter Drier The filter-drier used on Manitowoc ice machines are manufactured to Manitowoc specifications. The difference between a Manitowoc drier and an off- the-shelf drier is in filtration. A Manitowoc drier has dirt-retaining filtration, with fiberglass filters on both the inlet and outlet ends.

  • Page 146: Flammable Refrigerant Procedures

    Flammable Refrigerant Procedures Servicing Requirements • It is recommended that only technicians specifically trained in handling flammable refrigerants, service or dispose of equipment containing hydrocarbon refrigerants. • Color-coded red process tubes indicate use of a flammable refrigerant - Process tubes must be replaced after brazing or other service procedures.

  • Page 147: Refrigerant Purging Requirements

    REFRIGERANT PURGING REQUIREMENTS NOTE: Country and Local Codes for removal and processing of this refrigerant must always take precedence over these procedures. • Minimum of 10 feet from building, verify wind direction will not introduce refrigerant into building • Verify refrigerant does not enter buildings through intake air vents •...

  • Page 148: Refrigerant Purging Procedure

    REFRIGERANT PURGING PROCEDURE 1. Disconnect all electric power to the system and lockout tag out the power source(s). NOTE: Some systems may have more than one power supply. 2. Work in well-ventilated, open space and eliminate all ignition sources. 3. Install piercing valves on the high and low side access fittings.

  • Page 149: Pressure Testing

    PRESSURE TESTING 11. Pressure test with dry nitrogen to detect leaks. Use nitrogen and a trace amount of refrigerant to locate the leak if a pressure test indicates a leak is present. 12. Do not over pressurize the system. Check the name plate for the maximum test pressure.

  • Page 150: Refrigerant Charging

    Refrigerant Charging Due to the small refrigerant quantities, a cap tube in the .50 to .85 ID range with a shutoff valve at the access port can be used to control the flow of refrigerant. The charge accuracy must be within +/- 1% of the nameplate listed charge.
  • Page 151 NOTE: Manifold gauge set must be removed properly to ensure no refrigerant contamination or loss occurs. 18. Verify all of the vapor in the charging hoses is drawn into the refrigeration system before disconnecting the charging hoses. Run the ice machine in freeze cycle. Remove the high side low loss fitting.

  • Page 152: System Contamination Cleanup

    System Contamination Cleanup This section describes the basic requirements for restoring contaminated systems to reliable service. DETERMINING SEVERITY OF CONTAMINATION System contamination is generally caused by either moisture or residue from compressor burnout entering the refrigeration system. Inspection of the refrigerant usually provides the first indication of system contamination.
  • Page 153 Contamination/Cleanup Chart Symptoms/Findings Required Cleanup Procedure No symptoms or suspicion of Normal evacuation/ contamination recharging procedure Moisture/Air Contamination symptoms Mild contamination Refrigeration system open to atmosphere cleanup procedure for longer than 15 minutes Refrigeration test kit and/or acid oil test shows contamination No burnout deposits in open compressor lines...

  • Page 154: Mild System Contamination Cleanup Procedure

    MILD SYSTEM CONTAMINATION CLEANUP PROCEDURE 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.

  • Page 155: Procedure

    SEVERE SYSTEM CONTAMINATION CLEANUP PROCEDURE 1. Remove the refrigerant charge. 2. Remove the compressor. 3. If burnout deposits are found, replace the TXV. 4. Wipe away any burnout deposits from suction and discharge lines at compressor. 5. Sweep through the open system with dry nitrogen. 6.

  • Page 156: Total System Refrigerant Charge

    Total System Refrigerant Charge Importar This information is for reference only. Refer to the ice machine serial number tag to verify the system charge. Serial plate information overrides information listed on this page. Model Air-Cooled Refrigerant Type 110 g UDP0080 R290 3.8 oz 110 g...

  • Page 157: Cycle Times, 24 Hr. Ice Production And Refrigerant

    Charts Cycle Times, 24 Hr. Ice Production and Refrigerant Temperature Charts These charts are used as guidelines to verify correct ice machine operation. • Accurate collection of data is essential to obtain the correct diagnosis. Eliminate all non refrigeration problems before diagnosing the refrigeration system. •...

  • Page 158: Udp0080 Self-Contained Air-Cooled

    UDP0080 SELF-CONTAINED AIR-COOLED NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Harvest Entering Time Water Temperature °F/°C Condenser 50/10 70/21 90/32 °F/°C 14.6-16.5 17.6-19.9 20.3-23.0 70/21 15.5-17.5...

  • Page 159: Udp0080 Operating Temperatures

    Part Number STH098 06/19...

  • Page 160: Udp0140 Self-Contained Air-Cooled

    UDP0140 SELF-CONTAINED AIR-COOLED NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Harvest Entering Time Water Temperature °F/°C Condenser 50/10 70/21 90/32 °F/°C 10.2-11.7 12.4-14.1 13.0-14.8 70/21 11.2-12.8...

  • Page 161: Udp0140 Operating Temperatures

    Part Number STH098 06/19...

  • Page 162: Udp0240 Self-Contained Air-Cooled

    UDP0240 SELF-CONTAINED AIR-COOLED NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Harvest Around Ice Time Water Temperature °F/°C Machine 50/10 70/21 90/32 °F/°C 14.1-16.1 17.0-19.3 18.6-21.1 70/21...

  • Page 163: Udp0240 Operating Temperatures

    Part Number STH098 06/19...

  • Page 164: Udp0310 Self-Contained Air-Cooled

    UDP0310 SELF-CONTAINED AIR-COOLED NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Harvest Entering Time Water Temperature °F/°C Condenser 50/10 70/21 90/32 °F/°C 10.0-11.5 11.8-13.4 14.1-16.1 70/21 10.4-11.9...

  • Page 165: Udp0310 Operating Temperatures

    Part Number STH098 06/19...
  • Page 166 THIS PAGE INTENTIONALLY LEFT BLANK Part Number STH098 06/19...

  • Page 167: Wiring Diagrams

    Diagrams Wiring Diagrams The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the ice machine you are servicing. Warning Always disconnect power before working on electrical circuitry. Wiring Diagram Legend The following symbols are used on all of the wiring diagrams: Internal Compressor Overload (Some models have external compressor...

  • Page 168: Udp0080 Wiring Diagram

    UDP0080 WIRING DIAGRAM 1PH Self Contained Air-cooled (L1) L2 (N) GRND (22) (24) (23) (20) 19 41 (21) (10) (11) 34-1 34-2 (14) (12) (13) (15) 000001517_00 Part Number STH098 06/19...
  • Page 169 UDP0080 Wiring Diagram 1PH Self Contained Air-cooled Number Component Bin Switch Compressor Compressor Overload Compressor Start Capacitor Compressor Start Relay Condenser Fan Motor Contactor Coil Contactor Contacts Control Board Fan Cycle Control Fuse High Pressure Cutout Ice Thickness Probe 34-1 Light Bin Switch 34-2 Light Harvest...

  • Page 170: Udp0140/Udp0240 - 1Ph Air-Cooled

    UDP0140/UDP0240 - 1PH AIR-COOLED Self Contained Air-cooled L2 (N) (10) (11) (42) WHT (30) BLU (31) BLU (37) ORG (32) BLU (2) BLU (4) YEL (3) YEL (6) RED (5) PNK (14) BRN (32) BLK (12) PRPL (34) PRPL (30) BLU (13) BRN (15) BRN 040004017_06...
  • Page 171 UDP0140- 1Ph Air-cooled Number Component Bin Switch Compressor Compressor Overload Compressor Start Capacitor Compressor Start Relay Condenser Fan Motor Contactor Coil Contactor Contacts Control Board Fan Cycle Control Float Switch - Harvest Float Switch-Water Level Fuse High Pressure Cutout On/Off/Clean Switch See Control Board Schematic For Detail Solenoid Valve Thermistor - J4...

  • Page 172: Udp0310 1Ph Air-Cooled

    UDP0310 1PH AIR-COOLED Self Contained Air-cooled L2 (N) (10) (42) WHT (30) BLU (31) BLU (37) ORG (32) BLK (2) BLU (3) YEL (4) YEL (6) RED (5) PNK (14) BRN (32) BLK (12) PRPL (34) PRPL (30) BLU (47) YEL (48) BLK (49) RED (11)
  • Page 173 UDP0310 - 1PH Air-cooled Number Component Bin Switch Compressor Compressor Overload Compressor PTCR Compressor Run capacitor Compressor Start Capacitor Condenser Fan Motor Contactor Coil Contactor Contacts Control Board Fan Cycle Control Float Switch - Harvest Float Switch - Water Level Fuse High Pressure Cutout On/Off/Clean Switch...

  • Page 174: Electronic Control Boards

    ELECTRONIC CONTROL BOARDS ELECTRONIC CONTROL BOARD UDP0140/UDP0240/ UDP0310 Part Number STH098 06/19...
  • Page 175 Electronic Control Board UDP0140/UDP0240/UDP0310 Number Component LED Water Pump Relay LED Compressor Relay LED Water Dump Valve Relay LED Harvest Solenoid Valve LED Clean LED Thermistor LED Thermistor LED Thermistor LED Water Fill Valve LED Harvest Float LED Water Level Float LED Bin Switch LED Safety Limit 2 LED Safety Limit 1...

  • Page 176: Electronic Control Board Udp0080

    ELECTRONIC CONTROL BOARD UDP0080 Part Number STH098 06/19...
  • Page 177 Electronic Control Board UDP0080 Number Component Ice Thickness Probe Connection Ice/Off/Clean Toggle Switch Connection Bin Switch Light Harvest Light Control Board Transformer Compressor Relay Harvest Valve Relay Water Pump Relay Line Voltage Connector Fuse Part Number STH098 06/19...

  • Page 178: Tubing Schematics

    Tubing Schematics TUBING SCHEMATIC - UDP0080/UDP0140 EVAPORATOR HEAT EXPANSION EXCHANGER VALVE HARVEST SOLENOID STRAINER COMPRESSOR DRIER AIR CONDENSER TUBING SCHEMATIC - UDP0240/UDP0310 EVAPORATOR HEAT EXCHANGER EXPANSION VALVE HARVEST SOLENOID VALVE STRAINER COMPRESSOR DRIER AIR CONDENSER Part Number STH098 06/19...
  • Page 180 All of our products are backed by KitchenCare® – our aftermarket, repair, and parts service. CLEVELAND FRYMASTER® MANITOWOC® CONVOTHERM® GARLAND MERCO® DELFIELD® KOLPAK® MERRYCHEF® FITKITCHEN™ LINCOLN MULTIPLEX® ©2019 Welbilt Inc. except where explicitly stated otherwise. All rights reserved. Part Number STH098 06/19...

This manual is also suitable for:

Manitowoc neo udp0140aManitowoc neo udp0240aManitowoc neo udp0310a

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