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KitchenAid KUIS155H Technical Education

15" & 18" automatic ice makers
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TECHNICAL EDUCATION
15" & 18" AUTOMATIC

ICE MAKERS

KUIS155H,
KUIA15NRH, KUIA15NLH,
KUIA15RRL, KUIA15PLL,
KUIS15NRH, KUIS15PRH
KUIS185J,
KUIA18NNJ, KUIA18PNL,
KUIS18NNJ, KUIS18PNJ,
KUIV18NNM
JOB AID 4317339
KAR-14

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  Summary of Contents for KitchenAid KUIS155H

  • Page 1: Ice Makers

    KAR-14 TECHNICAL EDUCATION 15″ & 18″ AUTOMATIC ICE MAKERS KUIS155H, KUIS185J, KUIA15NRH, KUIA15NLH, KUIA18NNJ, KUIA18PNL, KUIA15RRL, KUIA15PLL, KUIS18NNJ, KUIS18PNJ, KUIS15NRH, KUIS15PRH KUIV18NNM JOB AID 4317339...
  • Page 2 FORWARD This KitchenAid Job Aid “15″ & 18″ Automatic Ice Makers” (Part No. 4317339), provides the technician with information on the installation, operation, and service of the 15″ & 18″ Automatic Ice Makers. It is to be used as a training Job Aid and Service Manual. For specific information on the model being serviced, refer to the “Use and Care Guide,”...
  • Page 3: Table Of Contents

    Page GENERAL ..........................1-1 Safety First ......................... 1-1 KitchenAid Model & Serial Number Designations—Models Prior To 2003 ......1-3 KitchenAid Model & Serial Number Designations—Models Starting With 2003 ....1-4 Model & Serial Number Label Location ................1-5 Specifications ........................1-6 KitchenAid Ice Maker Warranty ..................
  • Page 4 Page DIAGNOSIS & TROUBLESHOOTING ................... 6-1 Water And Its Effect On Making Ice ................... 6-1 Troubleshooting Chart ....................... 6-2 Diagnostic Flow Chart For Ice Maker Control Board #6100499 ........6-5 WIRING DIAGRAM & STRIP CIRCUITS ................7-1 Wiring Diagram ........................7-1 Strip Circuits ........................
  • Page 5: General

    GENERAL SAFETY FIRST Your safety and the safety of others is very important. We have provided many important safety messages in this Job Aid and on the appliance. Always read and obey all safety messages. This is the safety alert symbol. This symbol alerts you to hazards that can kill or hurt you and others.
  • Page 6 WARNING IMPORTANT Electrostatic Discharge (ESD) Sensitive Electronics ESD problems are present everywhere. ESD may damage or weaken the elec- tronic control assembly. The new control assembly may appear to work well after Electrical Shock Hazard repair is finished, but failure may occur at Connect green ground wire to ground a later date due to ESD stress.
  • Page 7: Kitchenaid Model & Serial Number Designations-Models Prior To 2003

    KITCHENAID MODEL & SERIAL NUMBER DESIGNATIONS MODELS PRIOR TO 2003 MODEL NUMBER MODEL NUMBER K UI S 15 H LS 0 INTERNATIONAL SALES IND. OR MARKETING CHANNEL IF PRESENT PRODUCT GROUP K = KITCHENAID PRODUCT IDENTIFICATION UI = UNDERCOUNTER ICE MAKER...
  • Page 8 KITCHENAID MODEL & SERIAL NUMBER DESIGNATIONS MODELS STARTING WITH 2003 MODEL NUMBER MODEL NUMBER K UI S 15 NR H INTERNATIONAL SALES IND. OR MARKETING CHANNEL IF PRESENT PRODUCT GROUP K = KITCHENAID PRODUCT IDENTIFICATION UI = UNDERCOUNTER ICE MAKER...
  • Page 9: Model & Serial Number Label Location

    MODEL & SERIAL NUMBER LABEL LOCATION The Model/Serial Number label location is shown below. Model & Serial Number Location...
  • Page 10: Specifications

    SPECIFICATIONS AC Power Supply ............97 to 127 VAC (rated 115VAC), 60 Hz Amperage ......................3.6 Amps (max) Minimum Circuit Capacity .................... 15 Amps Ice Production per 24 hours (Approximate) ................Water Temperature Ambient Temperature 60°F (15°C) 70°F (21°C) 46 lbs (21 kg) 80°F (27°C) 47 lbs (21 kg) 90°F (32°C)
  • Page 11: Kitchenaid Ice Maker Warranty

    KITCHENAID ICE MAKER WARRANTY...
  • Page 12 — NOTES —...
  • Page 13: Installation Information

    INSTALLATION INFORMATION ELECTRICAL SUPPLY REQUIREMENTS • A 115 Volt, 60 Hz, AC only 15 ampere electrical WARNING supply, properly grounded in accordance with the National Electrical Code and local codes and ordinances, is required. • It is recommended that a separate circuit, serving only the ice maker, be provided.
  • Page 14: Water Supply And Drain Connections

    WATER SUPPLY AND DRAIN CONNECTIONS CONNECTING THE WATER LINE Use 1/4″ (6.35 mm) O.D. copper tubing for the cold water supply and: Turn off the main water supply. a) Measure from the connection at the Turn on the nearest faucet and allow it to back of the ice maker to the cold water run long enough to clear line of water.
  • Page 15 11. Thread the nut onto the coupling at the CONNECTING THE DRAIN end of the copper tubing. Tighten the nut Gravity Drain System by hand. Then tighten it with a wrench two Connect the ice maker drain so that it is in more turns.
  • Page 16 After ensuring that the drain system is ad- Drain Pump System (On Some Models) equate, use the following steps to properly Connect the drain pump hose (provided with place the ice maker: the product) to the drain in accordance with all Plug in the ice maker or reconnect power.
  • Page 17: Theory Of Operation

    THEORY OF OPERATION OPERATING SYSTEMS There are three operating systems in the ice There are two very important additions to the maker: refrigeration system in the ice maker: the Hot Gas Valve, and the Condenser Accumulator • Refrigeration System Tube. The components operate as follows: •...
  • Page 18 WATER SYSTEM A water softener, or polyphosphate feeder, will not cure all of the problems associated with The water system provides: hard water, but they can be used to reduce • Fresh water for ice production scale buildup in the ice maker. NOTE: Some •...
  • Page 19 ELECTRICAL SYSTEM The ice maker’s electrical system provides power for the refrigeration and water systems, and controls the operational cycling.
  • Page 20: Operational Cycles

    OPERATIONAL CYCLES There are three main operational cycles for the During the Ice Making cycle, some of the hot ice maker (more detailed operation is found in gas that is in the condenser accumulating tube, the flow chart on page 6-5): condenses to a liquid, and remains in the accumulating tube.
  • Page 21 HARVEST CYCLE The electronic control board controls the vari- ous components and systems in the ice maker Electrical System for each of the Ice Making and Harvest cycles. When the set temperature of the evaporator When the ice maker’s service control switch is thermistor is reached, it signals the electronic in the “On”...
  • Page 22: New Ice Maker Control Board (#6100499)

    NEW ICE MAKER CONTROL BOARD (#6100499) NOTE: Due to a quality improvement, the new • The diagnostic mode sequence was control board will replace the older design changed, moving the bin and evaporator (#2185947). thermistor checks to the beginning of the sequence.
  • Page 23: Models With Internal Drain Pumps

    MODELS WITH INTERNAL DRAIN PUMPS The power cord on the internal drain pump is into the pump inlet, and then into the drain connected to a 120 VAC wall outlet. The ice pump chamber. As the water level rises, it maker is then connected to the 120 VAC outlet bridges the “full”...
  • Page 24 — NOTES —...
  • Page 25: Component Access

    COMPONENT ACCESS This section instructs you on how to service each component inside the KitchenAid Automatic Ice Maker. The components and their locations are shown below. COMPONENT LOCATIONS Electronic Control Board Light Switch Cutter Grid Transformer Pushbutton Switch Evaporator Assembly...
  • Page 26: Removing The Bin Thermistor, Cutter Grid, Evaporator Thermistor, & Water Distributor

    REMOVING THE BIN THERMISTOR, CUTTER GRID, EVAPORATOR THERMISTOR, & WATER DISTRIBUTOR To remove the bin thermistor: WARNING a) Disconnect the bin thermistor connec- tor from the bottom of the control hous- ing. b) Pull the bin thermistor out of the retain- ing clamp and remove it.
  • Page 27 c) Slide the cutter grid forward and out of To remove the evaporator thermistor: the unit and place it on a work surface. a) Remove the cutter grid from the unit Be careful not to scratch the ice maker (see step 7 on page 4-2 for the proce- liner.
  • Page 28 To remove the water distributor: Water Distributor a) Remove the cutter grid from the unit Water Hose (see step 7 on page 4-2 for the proce- dure). b) Pull out on the left and right water dis- tributor retainers, and remove the tabs from the slots in the evaporator.
  • Page 29: Removing The Electronic Control Housing Components

    REMOVING THE ELECTRONIC CONTROL HOUSING COMPONENTS NOTE: The control housing components con- WARNING sist of: • (1) Electronic control board • (2) Cutter grid transformer • (3) Light switch • (4) Pushbutton switch assembly Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.
  • Page 30 To remove the cutter grid transformer: NOTE: If the pushbutton switch assembly or light switch is replaced, the replacement part a) Disconnect the white & yellow wires and decorative overlay must be ordered using from the primary terminals, and the the model number of the ice maker.
  • Page 31: Removing The Water Recirculation Pump

    REMOVING THE WATER RECIRCULATION PUMP Remove the hex-head screw from the WARNING water recirculation pump shield and re- move the shield (see the lower left photo). Pull the water fill tube out of the slot in the water recirculation pump bracket. Remove the three hex-head screws from the water recirculation pump bracket.
  • Page 32: Removing The Condenser Fan Motor

    REMOVING THE CONDENSER FAN MOTOR Remove the two 5/16″ screws from the WARNING front of the cabinet. Disconnect the water outlet tubing from the water valve. Disconnect the electrical connectors from the water inlet valve and hot gas valve terminals. Electrical Shock Hazard Electrical Connectors Water Inlet Valve...
  • Page 33 10. Disconnect the inlet tube and the vent tube 12. Disconnect the wire connector from the from the internal drain pump. condenser fan motor. 13. Remove the four screws (two bottom and two side) from the condenser fan motor shroud. Slide the shroud assembly back towards the compressor, and then lift and Disconnect Tubing remove the assembly from the unit.
  • Page 34 14. Remove the nut from the condenser fan 15. Remove the three hex-head screws from motor blade and remove the blade. NOTE: the condenser fan motor and remove it Make sure to reinstall the fan with the from the shroud. “NUT SIDE”...
  • Page 35: Removing The Evaporator

    REMOVING THE EVAPORATOR Remove the two 5/16″ hex-head screws WARNING from the top hinge and remove the hinge. Hinge Screws Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
  • Page 36 10. 18″ Models Only: Remove the six screws 13. Cut the tie wrap from around the tubing from the counterbalance plate and re- and wire harness inside the channel. move the plate from the rear of the unit. 11. From the rear of the unit, remove the six hex-head screws from the channel cover and remove the cover.
  • Page 37 15. Remove the hex-head screw from the water recirculation pump shield and re- move the shield. 16. Remove the water fill tube from the notch in the water recirculation pump bracket, and pull the free end of the water line up, Retainer out of the unit.
  • Page 38 20. Lift the cabinet top off the unit and stand it REASSEMBLY NOTES: on the floor near the rear of the unit. • When installing the new evaporator, use a 21. Lift the evaporator and its connecting tub- generous amount of thermal heat trap paste ing high enough from the unit to access between the hot gas valve, and the evapo- the tubing underneath.
  • Page 39: Removing The Water Inlet Valve

    REMOVING THE WATER INLET VALVE WARNING Water Inlet Valve Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. Disconnect the water inlet and outlet tub- ing from the water inlet valve.
  • Page 40: Removing The Hot Gas Valve & Solenoid

    REMOVING THE HOT GAS VALVE & SOLENOID 2-Wire Connector 7mm Nut WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or Hot Gas Valve Solenoid electrical shock. Unplug ice maker or disconnect power.
  • Page 41: Removing The Condenser

    REMOVING THE CONDENSER Remove the four condenser fan motor WARNING screws from the fan motor shroud and pull the motor assembly back away from the evaporator as far as possible, but do not remove it (see step 13 on page 4-9 for the procedure).
  • Page 42: Removing The Compressor

    REMOVING THE COMPRESSOR Remove the terminal cover using a stan- WARNING dard screwdriver. Insert the screwdriver into the cover slot, and press down to unsnap and remove it. Compressor Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.
  • Page 43 Pull the two clips off the rear studs of the 15. Pull the two clips off the front compressor compressor. mounting studs. 16. Lift the compressor off the four mounting studs and remove it from the unit. Remove the four metal spacers and rubber isola- tors from the compressor stud locations.
  • Page 44: Removing The Internal Drain Pump

    REMOVING THE INTERNAL DRAIN PUMP (ONLY ON SOME MODELS) Loosen the clamps and pull the ends of the WARNING three water lines from the internal drain pump. Disconnect the power cord plug from the internal drain pump. Remove the two mounting screws from the internal drain pump.
  • Page 45: Removing The Ice Maker Door & Gasket (15" Models)

    REMOVING THE ICE MAKER DOOR & GASKET (15″ MODELS) To remove the door gasket: To remove the door, remove the top door screw from the ice maker door, and pull a) Open the ice maker door. the door off the bottom hinge. b) Pull the gasket out of the door track.
  • Page 46: Removing The Ice Maker Door & Gasket (18" Models)

    REMOVING THE ICE MAKER DOOR & GASKET (18″ MODELS) The 18˝ Ice Maker has a spring-loaded, drop- Remove the end of the spring from the down door. Since the door design is somewhat door bracket and the screw from the bot- unique, accessing procedures are included tom of the door hinge.
  • Page 47 Remove the two screws from the bottom Remove the six screws from the inner door cap. door panel and remove the panel. Bottom Door Cap Screws Remove the three screws from the door handle and the top door cap and remove Inner Door Panel the handle and cap from the door.
  • Page 48 Slide the bottom door cap and channel 10. Slide the bottom door cap off the channel supports out of the outer door panel. supports. Channel Supports Slide Bottom Door Cap Off Channel Supports Door Hinge Outer Door Panel Slide Bottom Door Cap & Channel Supports Out Of Outer Door Panel Hinge Pin Channel Support...
  • Page 49 REASSEMBLY NOTES: When you reinstall the inner door panel, slide the edge under the door handle, as To reassemble the unit, reverse the disas- shown below. sembly procedure. Door Handle Slide the edge of the outer door panel between the tabs and the inside edge of the top door cap.
  • Page 50 — NOTES — 4-26...
  • Page 51: Component Testing

    COMPONENT TESTING Before testing any of the components, perform • Check all connections before replacing com- the following checks: ponents, looking for broken or loose wires, failed terminals, or wires not pressed into • Control failure can be the result of corrosion connectors far enough.
  • Page 52: Cutter Grid

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. CUTTER GRID CUTTER GRID TRANSFORMER Secondary Primary Refer to page 4-5 for the procedure for servic- Refer to page 4-2 for the procedure for servic- ing the cutter grid transformer.
  • Page 53: Water Recirculation Pump

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. WATER RECIRCULATION PUMP CONDENSER FAN MOTOR Refer to page 4-8 for the procedure for servic- Refer to page 4-7 for the procedure for servic- ing the condenser fan motor.
  • Page 54: Water Inlet Valve Solenoid

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. WATER INLET VALVE SOLENOID HOT GAS VALVE SOLENOID Refer to page 4-15 for the procedure for servic- Refer to page 4-16 for the procedure for servic- ing the water inlet valve.
  • Page 55: Compressor, Overload Protector, & Relay

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. COMPRESSOR, OVERLOAD To test the compressor windings: PROTECTOR, & RELAY a) Touch one of the ohmmeter test leads to the Common (C) pin, and the other lead to the Start (S) pin.
  • Page 56 To test the relay: d) Turn the relay over so that the coil faces up, as shown below. a) Position the relay with the coil facing e) With the tip of the ohmmeter test leads down, as shown below. at the Start (S) and Run (M) pin sock- b) Insert the tip on one of the ohmmeter ets, the meter should indicate a closed test leads into the Run (M) pin socket,...
  • Page 57: Pushbutton Switch Assembly

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. PUSHBUTTON SWITCH ASSEMBLY Disconnect the four wire connectors from the pushbutton switch assembly. Refer to page 4-5 for the procedure for servic- ing the pushbutton switch assembly.
  • Page 58 — NOTES —...
  • Page 59: Diagnosis & Troubleshooting

    DIAGNOSIS & TROUBLESHOOTING WATER AND ITS EFFECT ON MAKING ICE Quality ice is defined as solid, clear, and free of ice is pure, and free of mineral contamination. taste or odor. All ice makers can provide this The following charts show some of the prob- type of ice only if the water used to produce the lems that can affect ice production.
  • Page 60: Troubleshooting Chart

    TROUBLESHOOTING CHART Problem Probable Cause Test Procedure-Action No power at wall outlet Check circuit breaker/fuses Check for kinked drain hose, No power at drain pump blocked screen or blocked vent power outlet outlet or hose. Check for continuity from Open selector switch terminals 1 - 2 on selector switch Loose connections Will not run...
  • Page 61 Problem Probable Cause Test Procedure-Action Slab will not release during Clean the evaporator plate harvest due to scale build up (see procedure on page 8-1) Will not make ice Defective or disconnected hot Water reservoir is empty. Test and repair or replace gas solenoid Evaporator is cold with 3/4"...
  • Page 62 Problem Probable Cause Test Procedure-Action Too much ice in bin Defective bin thermistor Replace The slab dropping off the plate and ice dropping from the Banging sound cutter grid into an empty bin are normal sounds The reservoir is empty. Look for a partially released slab, Noisy Grinding, cavitating sound...
  • Page 63: Diagnostic Flow Chart For Ice Maker Control Board #6100499

    DIAGNOSTIC FLOW CHART FOR ICE MAKER CONTROL BOARD #6100499 Before using this chart, confirm that you have electronic control board #6100499. Look for the part number on the control, or use the following procedure: 1. Disconnect the bin thermistor. 2. Place the unit into the Clean mode. 3.
  • Page 64 Flush Mode (5 minutes) The Flush Mode begins every time the pushbutton switch is changed to “On” from “Off” or “Clean.” This will be the initial time the unit is turned on, or when the unit is turned on after the completion of a Clean Cycle, or (drain pump model only) when operation resumes after the unit is shut down by the drain pump.
  • Page 65 Time in this mode is dependent on the temperature at the bin thermistor. Idle Mode: Idle Mode If "Clean" Service/Clean Mode (Idle Mode continues is selected begins (See page 6-11) as long as bin is full) If the bin thermistor is When the bin is not sensed by the not full...
  • Page 66 15 minutes, 30 seconds minimum* to 25 minutes, 30 seconds maximum***. Freeze Mode: Unit leaves Idle Mode Compressor & Condenser Fan are energized (30 seconds) 30 seco nds have elapsed Compressor, Condenser Fan, & Recirculation Pump are energized (15 minutes)* 15 minutes* have elapsed Compressor, Condenser Fan, &...
  • Page 67 1 to 16 minutes, dependent on the condition of the evaporator thermistor. Harvest Mode: NOTE: Each path is possible and acceptable at any temperature range. A typical operation is shown below that may be found at a particular ambient temperature. Unit leaves the Freeze Mode Compressor, Hot Gas &...
  • Page 68 This mode will last indefinitely until the failure is corrected. Failure Mode: Control checks bin thermistor If the bin thermistor If the bin thermistor is not sensed is sensed The “Cleaning” LED The “Cleaning” LED flashes off/on indefinitely flashes off/on indefinitely in 1 second intervals in 1/2 second intervals NOTE: If the LED is flashing in 1/2 second intervals, look for an evaporator thermistor...
  • Page 69 Service/Clean Mode (50 Min., 30 Sec.) The first 30 seconds will be Service (Diagnostics) Enter diagnostics (Clean is selected) The “Cleaning” LED The control checks The bin thermistor flashes off/on for the bin thermistor is not sensed two 1 second flashes Bin thermistor Pause is sensed...
  • Page 70 — NOTES — 6-12...
  • Page 71: Wiring Diagram & Strip Circuits

    WIRING DIAGRAM & STRIP CIRCUITS WIRING DIAGRAM...
  • Page 72: Strip Circuits

    STRIP CIRCUITS ICE MAKING MODE ELECTRONIC CONTROL WATER RECIRCULATING PUMP ON/OFF/CLEAN SWITCH CONDENSER FAN OVERLOAD COMPRESSOR RELAY NOTE: If the unit is run through the Ice Making mode with no water running across the evaporator plate, a complete frost pattern will appear. HARVEST MODE ELECTRONIC CONTROL...
  • Page 73 FIRST 25 SECONDS OF DIAGNOSTICS/CLEAN MODE ELECTRONIC CONTROL WATER RECIRCULATING PUMP CONDENSER FAN W/BK WATER INLET VALVE ON/OFF/CLEAN SWITCH HOT GAS SOLENOID OVERLOAD COMPRESSOR RELAY NOTE: Each relay on the electronic control board closes for five seconds in consecutive order. The LED remains On through the entire Diagnostics cycle.
  • Page 74 — NOTES —...
  • Page 75: Tech Tips

    NOTES: • KitchenAid recommends cleaning the ice maker at least once a year. More frequent cleaning may be required in areas that con- tain heavy amounts of minerals in the water supply.
  • Page 76 Read and follow all of the handling infor- Pour the remaining solution from the bottle mation that was supplied with the ice ma- into the water reservoir. Using the empty chine cleaner. IMPORTANT: Do not fol- bottle, fill the reservoir with clean water to low the cleaning directions that are printed within 1/4″...
  • Page 77: Adjusting The Ice Thickness

    ADJUSTING THE ICE THICKNESS Ice thickness is controlled by the placement of WARNING a jumper at P4 on the control board. The jumper positions for the three ice thickness settings are shown below. NOTE: If the jumper is missing, or in any position other than those shown below, the unit will produce normal ice thickness.
  • Page 78 — NOTES —...
  • Page 79: Product Specifications

    WARRANTY INFORMATION SOURCES IN THE UNITED STATES: FOR PRODUCT SPECIFICATIONS AND WARRANTY INFORMATION CALL: FOR WHIRLPOOL PRODUCTS: 1-800-253-1301 FOR KITCHENAID PRODUCTS: 1-800-422-1230 FOR ROPER PRODUCTS: 1-800-447-6737 FOR TECHNICAL ASSISTANCE WHILE AT THE CUSTOMER’S HOME CALL: THE TECHNICAL ASSISTANCE LINE: 1-800-253-2870...