icetro IC-0170A Page 109 Technician'S Handbook Download

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DIAGNOSING ICE THICKNESS CONTROL CIRCUITRY
Ice Machine Does Not Cycle Into Harvest when Water

Contacts the Ice Thickness Control Probe

Step 1

Move the 'ICE/OFF/WASH' switch to 'OFF' and

back to 'ON' to start a new cycle. Wait until the water

starts to flow over the evaporator.

Step 2

Use a jumper wire between the (red) ice

thickness probe connector on the outside of the control

box and any cabinet ground.

Step 2 Jumper red control box

terminal to ground

Monitoring Harvest Light

Correction

The ice machine cycles from

freeze to harvest.

The ice thickness probe is

causing the malfunction.

The machine does not

cycle into harvest.

The control board is causing the

malfunction.

Summary of Contents for IC-0170A

Page 1: ...Undercounter Ice Machines Technician s Handbook Revision Date 1 24 22...

Page 2: ......

Page 3: ...manual updates This equipment contains high voltage electricity and refrigerant charge Installation and repairs are to be performed by properly trained technicians aware of the dangers of dealing wit...

Page 4: ...the power supply e g circuit breaker or disconnect switch is provided Check all wiring connections including factory terminals before operation Connections can become loose during shipment and instal...

Page 5: ...e of supporting the combined weight of the equipment and product Additionally the equipment must be level side to side and front to back Use appropriate safety equipment during installation and servic...

Page 6: ...ers after installation is complete Refer to nameplate to identify the type of refrigerant in your equipment Only trained and qualified personnel aware of the dangers are allowed to work on the equipme...

Page 7: ...hemicals rubber gloves and eye protection and or face shield must be worn DANGER Do not operate equipment that has been misused abused neglected damaged or altered modified from that of original manuf...

Page 8: ...ust be in place and properly secured when operating this equipment Risk of fire shock All minimum clearances must be maintained Do not obstruct vents or openings Failure to disconnect power at the mai...

Page 9: ...trical Specifications Water Service Drains Water Supply Water Inlet Line Maintenance Interior Cleaning Sanitizing Remedial Cleaning Cleaning the Condenser Removal from Service Winterization Bin Remova...

Page 10: ...roubleshooting Error Codes 63 65 65 65 67 68 70 72 72 72 73 74 Troubleshooting Ice Machine Cycles Into Harvest Before the Harvest Float is down closed Ice Production Check Installation Visual Inspecti...

Page 11: ...gnosing An Ice Machine That Will Not Run Error Codes 103 103 104 Error Code Checklist 105 Diagnosing Ice Thickness Control Circuitry108 Ice Production Check 110 Installation Visual Inspection Checklis...

Page 12: ...IU 0170 IC IU 0220 123 124 126 128 129 130 132 Filter Driers Refrigerant Recovery Evacuation Refrigerant Re use Policy Recovery and Recharging Procedures IC U 0170 IC IU 0220 Recovery and Recharging P...

Page 13: ...151 Diagrams Wiring Diagrams WU 0100 Wiring Diagram IU 0170 IU 0220 Wiring Diagram Printed Circuit Boards PCB WU 0100 PCB Tubing Schematics Tubing Schematic WU 0100 Tubing Schematic IC IU 0170 IC IU 0...

Page 14: ...THIS PAGE INTENTIONALLY LEFT BLANK...

Page 15: ...70A IU 0170A WU 0100A General Information Ice Machine Warranty Information For warranty information visit http www icetroamerica com service support Warranty Registration Warranty Procedure Form Warra...

Page 16: ...r C Under Counter Old U Under Counter New D Dispenser CONDENSER TYPE A Self Contained Air Cooled W Self Contained Water Cooled R Remote Air Cooled C Dice H Half Dice F Flake N Nugget Full Model Number...

Page 17: ...16 How to Read a Serial Number Full Serial Number...

Page 18: ...requesting information from your local Icetro Distributor service representative or Icetro America The model and serial number are listed on the OWNER WARRANTY REGISTRATION CARD They are also listed o...

Page 19: ...or in direct sunlight The location must be capable of supporting the weight of the ice machine and a full bin of ice The location must allow enough clearance for water drain and electrical connections...

Page 20: ...itioning Peak WU 0100 1750 2600 IC 0170 2200 2600 IU 0170 2200 2600 B T U Hour Because the heat of rejection varies during the ice making cycle the figure shown is an average Ice machines like other r...

Page 21: ...ble Caution The legs must be screwed in tightly to prevent them from bending 3 Move the ice machine into its final position 4 Level the ice machine to ensure that the drain system functions correctly...

Page 22: ...e total circuit ampacity is used to help select the wire size of the electrical supply The wire size or gauge is also dependent upon location materials used length of run etc so it must be determined...

Page 23: ...tions nWarning For ice making connect to a potable water supply only Water Inlet Line Follow these guidelines to install water inlet lines Do not connect the ice machine to a hot water supply Be sure...

Page 24: ...and storage bin Drain lines must have a 1 4 drop per foot of run and must not create traps The floor drain must be large enough to accommodate drainage from all drains Install a tee to vent the ice ma...

Page 25: ...ne Connections Location Water Temperature Water Pressure Ice Machine Fitting Ice Making Water Inlet 50 F 10 C min 90 F 32 C max 20 psi 138 kPa min 80 psi 550 kPa max 3 8 Female Pipe Thread Bin Drain 3...

Page 26: ...ing Caution Use only nickle safe ice machine cleaner and sanitizer It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling Read and understand all labels p...

Page 27: ...WASH switch to OFF and wait for the ice machine to stop after the harvest cycle ends and ice falls from the evaporator Caution Never use anything to force ice from the evaporator Damage may result St...

Page 28: ...energize and begin to circulate the water cleaning solution mixture throughout the water circuit Model Amount of Cleaner Descaler Part Number 9405463 IC 0170 5 ounces 150 ml IU 0170 5 ounces 150 ml Wa...

Page 29: ...cale all components The solution will foam when it contacts lime scale and mineral deposits once the foaming stops use a soft bristle brush sponge or cloth not a wire brush to carefully descale the pa...

Page 30: ...sanitizing pay particular attention to the following areas Evaporator plastic parts including top bottom and sides Bin bottom sides and top Do not rinse the sanitized areas Step 9 Replace all removed...

Page 31: ...Continue to follow the wires to the back of the machine will need to remove the back panel then disconnect the wire connector at the wire harness NOTE Newer models will only have one float switch for...

Page 32: ...DISCONNECT FLOAT FOR COMPLETE REMOVAL Caution Do not disassemble float for descaling Incorrect reassembly will result in an ice machine that will not harvest 31...

Page 33: ...of the slush thermistor that is holding it to the top of the water trough Remove the slush thermistor While supporting the water trough remove the upper and lower thumbscrews from the water trough Rem...

Page 34: ...e 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 FORWA...

Page 35: ...om the left and right of distribution tube Pull forward on the distribution tube to release NOTE For ease of assembly when reinstalling the water distribution tube install the top edge first 1 Loosen...

Page 36: ...ne There must be adequate airflow through and around the ice machine to maximize ice production and ensure long component life Exterior Cleaning Clean the area around the ice machine as often as neces...

Page 37: ...temperatures This reduces ice production and shortens component life Clean the condenser at least every six months nWarning The condenser fins are sharp Use care when cleaning them Shine a flashlight...

Page 38: ...machine and drain the water trough 4 Energize the ice machine wait o for the water inlet valve to open and blow compressed air into the incoming water openings in the rear of the ice machine to remov...

Page 39: ...s to release bin from base 5 Disconnect clamp and remove bin drain 6 Remove communication cable from control board 7 Remove top cover 8 Slide bin forward to remove NOTE When reinstalling the bin ensur...

Page 40: ...f the ice machine 5 Disconnect clamp and remove bin drain 6 Remove communication cable from control box 7 Remove top cover 8 Slide bin forward to remove NOTE When reinstalling the bin ensure the bin s...

Page 41: ...ult Step 2 Remove all ice from the bin nWarning Wear rubber gloves and safety goggles and or face shield when handling Ice Machine Cleaner or Sanitizer Caution Do not mix Ice Machine Cleaner and Sanit...

Page 42: ...ctric power to the ice machine at the electric switch box before proceeding Step 6 Remove parts for descaling A Loosen the two screws securing the pump mounting bracket to the right side bulkhead B Di...

Page 43: ...ire behind the rear bulkhead Ice Thickness Probe Descaling Mix a solution of nickle safe ice machine cleaner and water 2 ounces of cleaner to 16 ounces of water in a container Soak the ice thickness p...

Page 44: ...ion 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 t...

Page 45: ...nlet tube from the float valve at the JG fitting by pushing down on the collar and lifting up on the tubing Loosen the two screws holding the float assembly to the read bulkhead Lift up on the the flo...

Page 46: ...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 Remov...

Page 47: ...d mounting pin disengages Installation Grasp the right side of ice damper and place left hand pin in the mounting bracket While applying pressure against the left hand mounting bracket push the damper...

Page 48: ...bin door to the left and pull down until the right hand side disengages the track While supporting the door allow the right hand side of the door to naturally fall into the bin and the left hand side...

Page 49: ...se a soft bristle brush sponge or cloth not a wire brush to carefully descale the parts Soak the parts for 5 minutes 15 20 minutes for heavily scaled parts Rinse all components with clean water Step 9...

Page 50: ...stic parts including top bottom and sides Bin bottom sides and top Do not rinse the sanitized areas Step 13 Replace all removed components Step 14 Reapply power and water to the ice machine and place...

Page 51: ...r water solution Do not rinse parts after sanitizing Step 20 Use 1 2 of the sanitizer water solution to sanitize all foodzone surfaces of the ice machine and bin Use a cloth or sponge to liberally app...

Page 52: ...a soft brush or a vacuum with a brush attachment Clean from top to bottom not side to side Be careful not to bend the condenser fins 3 Shine a flashlight through the condenser to check for dirt betwe...

Page 53: ...ambient temperatures of 32 F 00C or below 1 Disconnect the electric power at the circuit breaker or the electric service switch 2 Turn off the water supply 3 Remove the water from the water trough 4 D...

Page 54: ...ng the machine on and off The ICE OFF WASH switch is used to start and stop ice making Moving the switch from OFF to ICE will initiate the ice making cycle NOTE Stopping the ice machine by moving the...

Page 55: ...ion will stop and the ICE OFF WASH switch must be placed back to the ICE position for the machine to resume ice making Bin Full The FULL light energizes when the bin is full or is de energized if the...

Page 56: ...allow for pressure equalization and to reduce compressor starting torque Freeze Sequence 3 Prechill After the 28 second equalization the dump valve de energizes and the compressor and condenser fan mo...

Page 57: ...es to fill the water trough with fresh water for approximately 5 seconds Dual Floats Prior to TB Serial Numbers The freeze cycle continues until the water drops below the high level ice thickness floa...

Page 58: ...ergized and the water inlet valve is energized to fill the water trough until the float switch s are satisfied The sliding sheet of cubes opens the ice damper and bin switch The momentary opening and...

Page 59: ...and will hold it open After the ice damper is held open for 7 seconds the ice machine shuts off The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to...

Page 60: ...ve Water Inlet Valve Water Dump Valve Compressor Condenser Length of Time Start Up Off On Off On Off Off 22 Seconds 3 Compressor Startup Off On Off Off On On 5 Seconds Freeze Sequence 4 Prechill Off O...

Page 61: ...Satisfied Off On Off Off On Off On Off On On 12 Automatic Shut Off Off Off Off Off Off Off Until 3 Minute Delay Expires and Bin Switch Re closes Off Off On Off On On Until Float s Satisfied 5 Water Fi...

Page 62: ...of cycles required to stop the ice machine varies for each error code Error codes can be reset by cycling the ICE OFF WASH switch between OFF and ICE and starting a new ice making cycle It is recomme...

Page 63: ...inutes 3 consecutive times Lights up solid when the ice bin is full FULL indicator flashes 1 Water Supply Issue High level float detects water 10 minutes sooner than the low level float ERROR indicato...

Page 64: ...does not detect water within 5 minutes of the water inlet valve being energized 2 Extended Freeze Freeze time exceeds 65 minutes 3 Extended Harvest Harvest time exceeds minutes 3 consecutive times Pos...

Page 65: ...rd PCB ERROR CODE ERROR indicator red flashing 1 High Pressure Issue High pressure switch open for more than 10 seconds 2 High Pressure Issue High pressure switch open for more than 10 seconds 3 conse...

Page 66: ...CKNESS ADJUSTMENT The ice thickness can be adjusted by moving the high level harvest float on the front of the water trough up or down 1 Pull forward on the bottom of the bracket until clear of the ta...

Page 67: ...rning the adjustment screw on the ice thickness control 1 If adjustment is necessary turn the ice thickness probe adjustment screw clockwise to increase bridge thickness or counterclockwise to decreas...

Page 68: ...Per Cycle lbs Grams Maximum Ice Weight Per Cycle lbs Grams IC 0170 2 26 lbs 1025 grams 2 93 lbs 1329 grams 2 26 lbs 1025 grams 2 93 lbs 1329 grams IU 0170 67 IC 0220 2 26 lbs 1025 grams 2 93 lbs 1329...

Page 69: ...e hot gas valve remains on for 5 seconds during initial compressor start up and then shuts off At the same time the compressor starts the condenser fan motor is energized throughout the entire Freeze...

Page 70: ...closing of the bin switch terminates the harvest cycle and returns the ice machine to freeze steps 3 4 6 Automatic Shut off When the storage bin is full at the end of a harvest sequence the sheet of c...

Page 71: ...or Condenser Fan Motor Initial Start up 1 Pressure Off On Off Off 15 seconds 2 Refrigeration System Start up Off On On On 5 seconds Freeze Sequence 3 Prechill Off Off On On 30 seconds 4 Freeze On Off...

Page 72: ...MAKING SEQUENCE OF OPERATION Control Board Relays Length of Time Water Pump Hot Gas Valve Compressor Condenser Fan Motor Automatic Shut off 6 Auto Shut off Off Off Off Off Until bin switch re closes...

Page 73: ...iphon action The siphon action stops when the water level in the sump trough drops When the siphon action stops the float valve refills the water trough to the correct level Follow steps 1 through 6 u...

Page 74: ...wait until the float valve stops adding water 3 Adjust the water level to 1 4 to 3 8 6 3 to 9 5 mm below the standpipe A Loosen the two screws on the float valve bracket B Raise or lower the float va...

Page 75: ...bridge of 1 8 3 2 mm If an adjustment is needed follow the steps below 1 Turn the ice thickness probe adjustment screw clockwise for a thicker ice bridge or counterclockwise for a thinner ice bridge 2...

Page 76: ...reely Ice machine stops and can be restarted by turning the ice machine OFF ON Error Code stopping the ice machine Refer to Error Codes Ice sheet is thick Water trough level is too high Adjust ice thi...

Page 77: ...el is too low Check the water float Water filtration is poor Replace the filter Hot incoming water Connect the ice machine to a cold water supply Incorrect incoming water pressure Water pressure must...

Page 78: ...or component has a white relay above it s terminal connection on the PCB Above that relay is a green light that will illuminate anytime power is being sent to that component This along with the sequen...

Page 79: ...PCB Cont FREEZE MODE Sequence of Operation 78 Dump valve black hot gas valve red energized to flush water equalize pressure Compressor brown condenser blue water inlet valve yellow energized for prech...

Page 80: ...n condenser blue water pump white energized to circulate freeze water to evaporator CONTROL BOARD PCB Cont FREEZE MODE Sequence of Operation Compressor brown condenser blue hot gas valve red energized...

Page 81: ...will not remove the power supplied to the control board 1 Verify primary voltage is supplied to ice machine and the fuse circuit breaker is closed 2 Verify control board fuse is okay NOTE If any contr...

Page 82: ...h is opened closed in the harvest cycle before the ice releases If the harvest float is suspected to be the problem use the following procedure Step 1 With the machine in the freeze cycle use a jumper...

Page 83: ...the plate The ice damper bin switch is opened closed in the harvest cycle before the ice releases If the ice thickness probe is suspected to be the problem use the following procedure Use a jumper wir...

Page 84: ...NE CYCLES INTO HARVEST BEFORE THE HARVEST FLOAT IS DOWN CLOSED Step 1 Disconnect power to the ice machine and remove the low level harvest float switch blue from its connector on the outside of the co...

Page 85: ...sition Wait until water flows over the evaporator then refer to chart Result Correction The ice machine stays in freeze The ice thickness float switch connectors or wiring is causing the malfunction T...

Page 86: ...ng sump trough ____ 2 Refer to the appropriate Cycle Times 24 Hr Ice Production and Refrigerant Pressure Charts on page 219 Use the operating conditions determined in Step 1 to find published 24 Hour...

Page 87: ...when these numbers match closely If they match closely determine if Another larger ice machine is required Relocating the existing equipment to lower the load conditions is required Contact the local...

Page 88: ...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...

Page 89: ...leaking water Repair replace as needed Water valve is stuck open closed or is leaking Descale replace as needed Water is spraying out of the sump trough area Stop the water spray Uneven water flow acr...

Page 90: ...ion Ice forms across the entire evaporator surface At the beginning of the Freeze cycle it may appear that more ice is forming on the inlet of the evaporator than at the outlet At the end of the Freez...

Page 91: ...ice formation at the inlet of the evaporator Examples The ice at the outlet of the evaporator reaches the correct thickness but there is no ice formation at all at the inlet of the evaporator Possibl...

Page 92: ...hen the actual pressure falls within the published pressure range for the ice machine s operating conditions It is normal for the discharge pressure to be higher at the beginning of the freeze cycle w...

Page 93: ...klist Improper Installation Refer to Installation Visual Inspection Checklist on page 100 Improper Refrigerant Charge Undercharged Wrong type of refrigerant Other Non Icetro components in system High...

Page 94: ...g the ice machine changes These variables also determine the freeze cycle times To analyze and identify the proper suction pressure drop throughout the freeze cycle compare the published suction press...

Page 95: ...ssure Discharge pressure is too high and is affecting suction pressure refer to Discharge Pressure High Checklist on page 92 Improper Refrigerant Charge Overcharged Wrong type of refrigerant Non conde...

Page 96: ...on page 92 Improper Refrigerant Charge Undercharged Wrong type of refrigerant Other Non Icetro components in system Improper water supply over evaporator refer to Water System Checklist on page 87 Lo...

Page 97: ...evaporator during the freeze cycle The hot gas valve is not used during the freeze cycle The hot gas valve is de energized closed preventing refrigerant flow from the compressor into the evaporator 2...

Page 98: ...s valve remaining partially open during the freeze cycle can be similar to symptoms of an expansion valve float valve or compressor problem Symptoms are dependent on the amount of leakage in the freez...

Page 99: ...hot gas valve itself will not work for this comparison The hot gas valve outlet is on the suction side cool refrigerant It may be cool enough to touch even if the valve is leaking 3 Feel the compresso...

Page 100: ...temperature of a hot compressor discharge line Hot Hot This is an indication something is wrong as the hot gas valve inlet did not cool down during the freeze cycle If the compressor dome is also ent...

Page 101: ...ect the maximum discharge line temperature Higher ambient air temperatures at the condenser higher discharge line temperatures at the compressor Lower ambient air temperatures at the condenser lower d...

Page 102: ...lb is positioned and secured correctly Discharge Line Temperature Below 150 F 66 C at End of Freeze Cycle Ice machines that have a flooding expansion valve will have a discharge line temperature that...

Page 103: ...erify a low charge Do not add more than the total charge of refrigerant If the problem is corrected the ice machine is low on charge Find the refrigerant leak The ice machine must operate with the nam...

Page 104: ...y control board fuse is okay 3 If the power light functions on the front of the machine the fuse is okay 4 Verify the bin switch functions properly A defective bin switch can falsely indicate a full b...

Page 105: ...e that will stop the ice machine if conditions arise which could cause a major component failure Error Code 1 If the freeze time exceeds 65 minutes 3 consecutive times the error LED red will blink Err...

Page 106: ...Code 1 Freeze time exceeds 65 minutes for 3 consecutive freeze cycles Possible Cause Checklist Improper installation Refer to Installation Visual Inspection Checklist on page 165 Water System Water L...

Page 107: ...emperature 110 F 43 3 C max Condenser discharge air re circulation Dirty condenser fins Defective fan motorDirty condenser Refrigeration System Non Icetro components Improper refrigerant charge Defect...

Page 108: ...defective water dump valve Water freezing behind evaporator Plastic extrusions and gaskets not securely mounted to the evaporator Low water pressure 20 psig min Loss of water from sump area Clogged w...

Page 109: ...starts to flow over the evaporator Step 2 Use a jumper wire between the red ice thickness probe connector on the outside of the control box and any cabinet ground Step 2 Jumper red control box termin...

Page 110: ...or Step 2 Disconnect the ice thickness probe from the control box terminal Step 2 Disconnect probe from control board terminal Monitoring Harvest Light Correction The ice machine remains in the freeze...

Page 111: ...sump trough ____ 2 Refer to the appropriate Cycle Times 24 Hr Ice Production and Refrigerant Pressure Charts on page 219 Use the operating conditions determined in Step 1 to find published 24 Hour Ic...

Page 112: ...n these numbers match closely If they match closely determine if Another larger ice machine is required Relocating the existing equipment to lower the load conditions is required Contact the local Ice...

Page 113: ...level Level the ice machine Condenser is dirty Clean the condenser Water filtration is not installed or plugged Install a new water filter Water drains are not run separately and or are not vented Ru...

Page 114: ...ion components Water area evaporator is dirty Descale as needed Water inlet pressure not between 20 and 80 psig 1 5 bar 138 552 kPa Install a water regulator valve or increase the water pressure Incom...

Page 115: ...ale replace as needed Water is spraying out of the sump trough area Stop the water spray Water is leaking through the sump trough overflow Set the water level 1 4 3 8 below standpipe Uneven water flow...

Page 116: ...pattern could indicate an improper refrigerant charge If this is determined to be the case recover any refrigerant left in the system evacuate the system and weigh in a new charge according the the ma...

Page 117: ...Pressure Low Checklist Improper Installation Refer to Installation Visual Inspection Checklist on page 112 Improper Refrigerant Charge Undercharged Wrong type of refrigerant Other Non Icetro componen...

Page 118: ...on page 112 Discharge Pressure Discharge temperature is too high and is affecting suction temperature refer to Discharge Line Temperature High Checklist on page 116 Improper Refrigerant Charge Overcha...

Page 119: ...Checklist on page 116 Improper Refrigerant Charge Undercharged Wrong type of refrigerant Other Non Icetro components in system Improper water supply over evaporator refer to Water System Checklist on...

Page 120: ...rator during the freeze cycle The hot gas valve is not used during the freeze cycle The hot gas valve is de energized closed preventing refrigerant flow from the receiver into the evaporator 2 Allows...

Page 121: ...valve remaining partially open during the freeze cycle can be similar to symptoms of an expansion valve float valve or compressor problem Symptoms are dependent on the amount of leakage in the freeze...

Page 122: ...gas valve itself will not work for this comparison The hot gas valve outlet is on the suction side cool refrigerant It may be cool enough to touch even if the valve is leaking 3 Feel the compressor d...

Page 123: ...emperature of a hot compressor discharge line Hot Hot This is an indication something is wrong as the hot gas valve inlet did not cool down during the freeze cycle If the compressor dome is also entir...

Page 124: ...rd at all times Removing the control board fuse or pressing the power button will not remove the power supplied to the control board Check Procedure 1 If the power light is lit on the front of the mac...

Page 125: ...c ice machine shut off If the storage bin is full at the end of a harvest cycle the sheet of cubes fails to clear the ice damper and holds it down After the ice damper is held down for 7 seconds the i...

Page 126: ...as closed properly 4 Move the ice damper away from the evaporator The bin switch must open The FULL light on indicates the bin switch has opened properly Testing The Bin Switch 1 Disconnect the bin sw...

Page 127: ...w enough to initiate a harvest sequence High Level Ice Thickness Float Indicates the water level has been reached for the appropriate ice thickness setting Specifications Normally closed float operate...

Page 128: ...ition The float switch should read closed 4 Place the float in the up position The float switch should read open Float Closed Float Open NOTE Make adjustments with the float while testing it by moving...

Page 129: ...0220 IU 01220 Function Thermistor resistance values change with temperature The value supplied to the control board is used to identify temperature at the thermistor location Check procedure If the th...

Page 130: ...FF or WASH mode of operation SPECIFICATIONS Single pole double throw switch CHECK PROCEDURE 1 Inspect the toggle switch for correct wiring 2 Isolate the toggle switch by disconnecting all wires from t...

Page 131: ...mpressor terminals 2 The resistance values between C and S and between C and R when added together should equal the resistance value between S and R 3 If the overload is open there will be a resistanc...

Page 132: ...ve the compressor is seized Replace the compressor If the pressures move the compressor is turning slowly and is not seized Check the capacitors and relay Compressor Drawing High Amps The continuous a...

Page 133: ...switch to OFF 2 Connect manifold gauge 3 Hook voltmeter in parallel across the HPCO leaving wires attached 4 Set the ICE OFF WASH switch to ON No air flowing through the condenser will cause the HPCO...

Page 134: ...hines are manufactured to Icetro specifications Always make sure to use an O E M filter drier when opening the refrigeration system Important The liquid line drier is covered as a warranty part The li...

Page 135: ...s refrigerant to new product specifications see below by means which may include distillation A chemical analysis of the refrigerant is required after processing to be sure that product specifications...

Page 136: ...taminated refrigerant Damage resulting from the use of contaminated recovered or recycled refrigerant is the sole responsibility of the servicing company Icetro approves the use of 1 New Refrigerant M...

Page 137: ...vacuated and recharged properly following failure s Whether the system has been contaminated by this failure Compressor motor burnouts and improper past service prevent refrigerant re use Refer to pag...

Page 138: ...he use of contaminated refrigerant Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company Important Replace the liquid line drier before evacuati...

Page 139: ...orm a standing vacuum leak check NOTE Check for leaks using an electronic leak detector after charging the ice machine Follow the Charging Procedures below CHARGING PROCEDURES Important The charge is...

Page 140: ...oses A Run the ice machine in freeze cycle B Disconnect the low loss fitting from the high side access valve at the ice machine C Remain connected to the low side access valve at the ice machine D Ope...

Page 141: ...line drier before evacuating and recharging Use only a Icetro O E M liquid line filter drier to prevent voiding the warranty CONNECTIONS These ice machines are critically charged Use the low side acce...

Page 142: ...cuum leak check NOTE Check for leaks using a halide or electronic leak detector after charging the ice machine CHARGING PROCEDURES Important The charge is critical on all Icetro ice machines Use a sca...

Page 143: ...ection of the refrigerant usually provides the first indication of system contamination Obvious moisture or an acrid odor in the refrigerant indicates contamination If either condition is found or if...

Page 144: ...ws contamination No burnout deposits in open compressor lines Mild contamination cleanup procedure Mild Compressor Burnout symptoms Oil appears clean but smells acrid Refrigeration test kit or acid oi...

Page 145: ...step with the following A Pull vacuum to 1000 microns Break the vacuum with dry nitrogen and sweep the system Pressurize to a minimum of 5 psig B Pull vacuum to 500 microns Break the vacuum with dry n...

Page 146: ...ion line filter drier in front of compressor 8 Install a new liquid line drier 9 Follow the normal evacuation procedure except replace the evacuation step with the following A Pull vacuum to 1000 micr...

Page 147: ...he pressure drop is less than 2 psig the filter drier should be adequate for complete cleanup B If the pressure drop exceeds 2 psig change the suction line filter drier and the liquid line drier Repea...

Page 148: ...tool Position the pinch off tool around the tubing as far from the pressure control as feasible Clamp down on the tubing until the pinch off is complete nWarning Do not unsolder a defective component...

Page 149: ...achine serial number tag to verify the system charge Serial plate information overrides information listed on this page Model Air Cooled Water Cooled Refrigerant Type WU 0100 6 7 oz NA R134A IC 0170 1...

Page 150: ...ure Ice production checks that are within 10 of the chart are considered normal This is due to variances in water and air temperature Actual temperatures will seldom match the chart exactly Zero out m...

Page 151: ...WU 0100 SELF CONTAINED AIR COOLED NOTE These characteristics will vary depending on operating conditions Cycle Times Freeze Time Harvest Time Total Cycle Time 150...

Page 152: ...IC 0170 IU 0170 IC 0220 IU 0220 SELF CONTAINED AIR COOLED NOTE These characteristics may vary depending on operating conditions Cycle Times Freeze Time Harvest Time Total Cycle Time 151...

Page 153: ...ollowing pages contain electrical wiring diagrams Be sure you are referring to the correct diagram for the ice machine you are servicing nWarning Always disconnect power before working on electrical c...

Page 154: ...WU 0100 WIRING DIAGRAM Self Contained Air cooled 153...

Page 155: ...IC 0170 IU 0170 IC 0220 IU 0220 WIRING DIAGRAM Self Contained Air cooled 154...

Page 156: ...Printed Circuit Bards PCB WU 0100 PCB 155...

Page 157: ...IC 0170 IU 0170 IC 0220 IU 0220 PCB Part 415010200 V1 PCB Using High Low Floats NOTE PCB is backwards compatible with the original part 415009100 156...

Page 158: ...IC 0170 IU 0170 IC 0220 IU 0220 PCB Part 415010201 V2 PCB Using Ice Thickness Probe NOTE PCB is not backwards compatible with part 415009100 or part 415010200 157...

Page 159: ...EVAPORATOR Tubing Schematics TUBING SCHEMATIC WU 0100 HEAT EXCHANGER AIR OR WATER CONDENSER HARVEST SOLENOID DRIER COMPRESSOR 158...

Page 160: ...TUBING SCHEMATIC IU0170 IU0220 HEAT EXCHANGER AIR OR WATER CONDENSER DRIER EXPANSION VALVE HARVEST SOLENOID VALVE EVAPORATOR COMPRESSOR STRAINER 159...

Page 161: ...SPACE FOR TECHNICIAN S NOTES...

Page 162: ...SPACE FOR TECHNICIAN S NOTES...

Page 163: ...SPACE FOR TECHNICIAN S NOTES...

Page 164: ...SPACE FOR TECHNICIAN S NOTES...

Page 165: ......

Page 166: ...ADWAY ANAHEIM CA 92802 714 215 4864 WWW ICETROAMERICA COM 2022 Icetro America except where explicitly stated otherwise All rights reserved Continuing product improvement may necessitate change of spec...

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