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Purge valve

1. Test using the controller’s indicator lights. Shut unit off by holding the Off button for 3 seconds. Wait
four minutes. Push and release the On button, observe the Purge Valve indicator light. As the unit drains
the reservoir, the purge valve will be powered. When it gets power, the indicator light will be ON. If the
purge valve does not open to drain the reservoir when its indicator light is on, do a voltage check. Shut
the unit down by holding the Off button in for 3 seconds. Unplug the harness connection from the purge
valve. Wait four minutes. Push and release the On button to restart the machine. As the unit drains the
reservoir, the purge valve connection should receive full voltage. If it does, the purge valve should be
replaced. If there is no voltage, check voltage from the controller. The purge valve pin is 3 (dump valve
on wiring diagram).

Note: The coil of this valve is internally rectified, and will normally show infinite resistance when tested
with an ohmmeter.

November 2010

Page 28

C2648 Service Manual

Test Procedures - Loads

This light will be ON when
the Purge Valve is in

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Summary of Contents for C2648 -

Page 1: ...ards Keep this manual for future reference November 2010 Page 1 C2648 Service Manual Installation Table of Contents Installation Product Specifications Page 2 Model Number Description Page 3 Electrical and Refrigeration Requirements Page 4 Condenser and Ice Machine Layouts Page 5 Water Page 6 Panel Removal Page 7 Remote Condenser Location Page 8 For The Installer Remote Condenser Page 9 Precharged...

Page 2: ...chine will operate under the listed conditions ice making capacity will be reduced with increases in water supply temperature and or air temperatures at the condenser Bin meltage will also increase with any increase in room temperature Remote condenser Minimum Maximum Air temperature 20o F 120o F Power Supply Minimum Maximum 208 230 volt model 198 volts 253 volts Warranty Information The warranty ...

Page 3: ...ation Model BH1100 BH1300 or BH1600 C2648 Adapter panels included with bin no adapter needed Other bins and applications Take note of the depth of the machine Slope front bins may not be deep enough to allow the bin door to rest open against the machine Upright bins are recommended Note the drop zone and optional ultrasonic sensor locations in the illustrations Drop zone hole must be 20 25 deep Sc...

Page 4: ...e machine is operating U L listed for the ice machine Non Scotsman condensers must have prior Scotsman Engineering approval for warranty coverage to be in effect Precharged tubing kits The ice making head s and the remote condenser s refrigeration circuits must be connected They are designed to be connected using precharged refrigerant tubing supplied in kits of liquid and discharge tubes Several ...

Page 5: ...LECPLG LIQUIDLINE 1 2IN MALECPLG Ø 88 ELECTRICAL INLET AIR FLOW 33 38 MOUNTING HOLES Ø 562 847 95 34 65 880 11 2 77 70 31 31 86 809 32 48 33 47 89 34 06 FRONTVIEW 28 28 27 56 RIGHTVIEW 3 50 11 80 19 75 4 50 2 50 15 00 4 25 20 25 2 30 40 50 DROPZONE TOPVIEW MIN BINTOP OPENING ULTRASONICBIN LEVELSENSOR 0 4 13 5 01 7 43 38 62 39 62 0 3 79 7 04 27 97 28 57 31 53 ELECTRICAL REMOTECONDENSER FANMOTOR DRA...

Page 6: ...y of these materials to contaminate the machine Most water filters remove chlorine from the water supply to the machine which contributes to this situation Testing has shown that using a filter that does not remove chlorine such as the Scotsman Aqua Patrol will greatly improve this situation while the ice making process itself will remove the chlorine from the ice resulting in no taste or odor imp...

Page 7: ... condenser near the quick connect fittings Uncrate and Set Up Begin with the ice storage bin Uncrate and attach legs Check the bin top gasket for tears or gaps If recycling an older bin replace the gasket or repair with food grade sealant prior to placing the ice machine on the bin Install the bin top adapter if one is required for the application If the ice machine has not been unpacked do so now...

Page 8: ...d Line Length Configurations that do NOT meet these requirements must receive prior written authorization from Scotsman Do NOT Route a line set that rises then falls then rises Route a line set that falls then rises then falls Calculation Example 1 The condenser is to be located 5 feet below the ice machine and then 20 feet away horizontally 5 feet x 6 6 33 33 20 53 This location would be acceptab...

Page 9: ...t all applicable building codes Roof Attachment Install and attach the remote condenser to the roof of the building using the methods and practices of construction that conform to the local building codes including having a roofing contractor secure the condenser to the roof November 2010 Page 9 C2648 Service Manual Installation Remote Condenser Typical System Illustration Remote Condenser Ice Mac...

Page 10: ...ocal codes a separate hole may be required for the electrical power supply to the condenser Caution Do NOT kink the refrigerant tubing while routing it 3 Route the refrigerant tubes thru the roof opening Follow straight line routing whenever possible Excess tubing may EITHER be coiled up INSIDE the building OR cut out prior to connection to the ice maker and condenser If the excess tubing is cut o...

Page 11: ...ng the couplings together by hand until it is certain that the threads are properly engaged 4b Then using two wrenches tighten the coupling until it bottoms out or a definite increase in resistance is felt It is important that ONLY the nut on the pre charged tube be turned or the diaphragms will be torn out by the piercing knives and they will be loose in the refrigeration system Note As the coupl...

Page 12: ...d model and might not be correct for this one 1 Connect water supply to water inlet fittings 2 Connect drain tubing to drain fitting 3 Route the drain tubing to building drain Follow local codes for air gap 4 Use rigid drain tubes and route them separately do not Tee into the bin s drain Vent the reservoir drain A vertical vent at the back of the drain extended about 8 10 will allow the gravity dr...

Page 13: ...maker electrical junction box Electrical connections are made inside the junction box in the back panel of the ice machine 1 Remove the junction box cover and route the power cord through the access hole and properly attach the power supply wires to the leads in the junction box 2 Attach the remote condenser fan motor wires to the wires in the junction box tagged fan motor leads 3 Install field su...

Page 14: ...ly routed between the remote condenser and the ice machine 8 Have the quick connects been properly connected 9 Has the power supply wire from the ice machine to the remote condenser been properly run and connected 10 Has the unit been leveled 11 Have all unpacking materials been removed 12 Is the water pressure adequate 13 Have the drain connections been checked for leaks 14 Has the bin interior b...

Page 15: ...moved away and OFF when returned to its normal position Note Moving the curtain during the Freeze cycle has no affect on unit operation 5 Observe the Ready for Harvest indicator light It may blink early in the freeze cycle that is normal The control will ignore that signal for the first 6 minutes of freeze 6 When the ice has frozen enough the Ready for Harvest indicator light will be on steady Aft...

Page 16: ...automatic position suitable for most water conditions The setting can be changed to one of 5 manual settings or left on automatic purge setting 1 Minimum 2 Moderate 3 Standard 4 Heavy 5 Maximum A Automatic Water Type RO water or equivalent Factory Setting for typical water High TDS water Any with conductivity not less than 10 microSiemens cm To set 1 Switch the machine OFF by holding the Off butto...

Page 17: ... power Switched off Normal Normal All Blinking Unit remotely locked out check with leasing company If the Water light is on the machine has sensed a lack of water Check the water supply to the machine The water may have been shut off or the water filter cartridges need to be changed If the Clean light is on the machine has determined that it may need to be cleaned Contact an authorized Scotsman se...

Page 18: ...ce used Planning to sanitize the bin Faster turnover for fresher ice Use of adjustable ice level control There are several positions the ice level can be set to including Off knob and label indicators lined up where it fills the bin until the standard bin control shuts the machine off See the kit s instructions for complete details Rotate the adjustment post to the desired ice level The machine wi...

Page 19: ...remote condenser The ice machine head should not generate significant heat Noise The ice machine will make noise when it is in ice making mode The compressor and water pumps all produce some sound It is also normal to hear some cracking just before the harvest cycle begins In addition during the harvest cycle each harvest assist solenoid will click twice as it pushes the ice out and returns to its...

Page 20: ...pour 24 ounces of Scotsman Clear 1 Scale remover into the water reservoir 6 Operate the machine for at least 10 minutes 7 Push and release the yellow Clean button again 8 Operate the machine for at least 20 minutes then push the red Off button 9 Check for scale repeat steps 3 thru 7 if scale is still evident 10 Disconnect pump hoses from water distributors 11 Depress snaps and pull water distribut...

Page 21: ...e gallon of the sanitizer solution into the reservoir 27 Push and release the yellow Clean button 28 Operate the machine for about a minute 29 Push and release the yellow Clean button again 30 Operate the machine for 20 minutes then push the red Off button 31 Return all removed panels to their original positions 32 Push and release the green ON button to resume ice making Remove and discard all ic...

Page 22: ...r and soft brush Be careful not to damage the condenser s fins Use a fin comb to straighten any bent fins Exterior Panels The front and side panels are durable stainless steel Fingerprints dust and grease will require cleaning with a good quality stainless steel cleaner Water filters If the machine has been connected to water filters check the cartridges for the date they were replaced or for the ...

Page 23: ...porator When the ice is the correct size the controller switches the machine to a harvest cycle All three hot gas valves open at the same time Harvest continues until all 3 curtains have opened After all 3 curtains have opened and re closed the freeze cycle restarts If one or more of the curtains stay open for 30 seconds or longer the controller switches the machine off closes the liquid line sole...

Page 24: ...Procedures Loads page 27 Test Procedures Loads page 28 Test Procedures Loads page 29 Test Procedures Loads page 30 Test Procedures Loads page 31 Test Procedures Loads page 32 Test Procedures Loads page 33 Test Procedures Loads page 34 Reservoir Removal page 35 Controller Differences page 36 Thermistor Values page 37 Performance Information page 39 Repair Procedures page 40 Harvest Assist Solenoid ...

Page 25: ...r Conductivity probe Bin Control Curtain Switches Ice type Unified Harvest system Hot gas defrost with mechanical assist Electrical Components Compressor Liquid line valve Contactor Water Pumps 2 Pump relay NC shuts pump 2 off during draining Inlet Water Solenoid Valve Purge or Dump Valve Fan Motor on remote condenser High pressure cut out Harvest Assist Solenoids 3 Hot Gas Valves 3 High capacity ...

Page 26: ...mp Sensor Failure 7 Discharge Temp Sensor Failure 8 flashes Short Freeze Retrying 8 Short Freeze Thin ice Setting Codes requires push button sequence Water Purge Settings A 1 2 3 4 5 De Scale notification see table to the right November 2010 Page 3 C2648 Service Manual Change De Scale Notification Interval This feature is accessible only from standby Status Light Off 1 Press and hold harvest butto...

Page 27: ...denser Fan Aux Aux liquid line solenoid Water Pump Purge Valve Water Solenoid Hot Gas Compressor Ready to Harvest Sump Empty Sump Full Curtain SW1 Curtain SW2 Curtain SW3 in Display Code November 2010 Page 4 C2648 Service Manual Component Indicator Lights ...

Page 28: ...ds the purge valve opens When the purge valve is opened a relay is energized to disconnect power to pump number 2 and water is drained from the reservoir by pump number 1 Based on either the automatic purge or manual purge setting the pump and purge valve will be switched off at a time determined to have drained enough water for that setting The inlet water valve will open to fill the reservoir an...

Page 29: ...mpressor fan motor water pump sump full lights will be ON and all curtain switch lights will be OFF The Freeze cycle continues When the reservoir water temperature falls to a certain preset point the water pumps will shut off for 30 seconds This is the anti slush period At this time the controller checks the conductivity of the water in the reservoir for the auto purge feature After the water pump...

Page 30: ...Ready to Harvest light will switch Off when the ice falls from the evaporator Harvest continues until the ice slab is ejected from the evaporator and falls opening the curtain When the curtain opens the magnetic reed curtain switch opens breaking the circuit to the controller If all the curtains re close within 30 seconds the controller switches the machine back into another freeze cycle If any cu...

Page 31: ...indicator light will be ON Energized for a time during harvest Fan Motor Remote condenser fan motor is on whenever the compressor is High pressure cut out There is a high pressure cut out switch that shuts the power off to the compressor contactor if the discharge pressure is too high It is an automatic reset Harvest Assist Solenoids Operated by the controller through a relay In parallel with the ...

Page 32: ...when water contacts a probe suspended over ice plate Signals ready for harvest Curtain Switches Magnetic reed switch Normally open switch is closed when magnet is nearby This model has three curtain switches Curtains may be removed in the freeze cycle without affecting controller operation A curtain removed during harvest will cause the controller to terminate harvest and shut the unit off All cur...

Page 33: ...will be displayed during that time Component Indicator Light Table System Indicator Light ON Condenser Fan or Liquid Line Valve LLV open Water Pump Pump Motor Powered Purge Valve Purge Valve Opens Inlet Water Solenoid Valve Inlet Water Valve Opens Hot Gas Hot Gas Valve Opens Compressor Contactor Contactor Closes Ready to Harvest Water contacting ice thickness sensor probe Sump Empty Open between m...

Page 34: ...admaster Included with condenser Remote Systems Head pressure control valves in condenser No check valves Controller pumps unit down by closing the liquid line valve and keeping the compressor on for a fixed time period at shut down High pressure cut out Shuts compressor off if discharge pressure is too high automatic reset Cut out at 450 PSIG Cut in at 350 PSIG Evaporators Unified cell plate Nick...

Page 35: ...Schematic November 2010 Page 12 C2648 Service Manual C2648R Headmaster Remote Condenser Receiver Liquid Line Valve Compressor OPR Valve TXV Hot Gas Valve Discharge Liquid Evaporator Suction Heat Exchange Accumulator ...

Page 36: ... is full and top probe makes circuit to mid probe Pumps Unsealed pedestal type twist release mounting Water purge valve Solenoid type Opens to purge water during harvest cycle Water Level Sensor Three probe conductivity Distributors ABS plastic Evenly distributes water over the evaporator surface Slides off the evaporator top Removable cover for ease of cleaning November 2010 Page 13 C2648 Service...

Page 37: ...plied to the controller Status Light Green when machine is in ice making mode and is operating correctly Blinks red when a machine malfunction has been detected Water Light Blinks red when reservoir does not fill with allowed time period De scale sanitize Yellow when the controller has determined it is time to de scale and sanitize the machine Use clean process to reset light Time is determined by...

Page 38: ...shut down and must be manually reset Max harvest time 3 5 minutes If the harvest cycle has continued for 3 5 minutes without the curtain opening the controller will shut the machine off for 50 minutes and then restart If there is another the machine will shut the machine off for another 50 minutes and then restart If it fails a third consecutive time the controller will shut the machine down and m...

Page 39: ...ontinue until the default harvest time expires Default harvest time is 3 minutes The machine will then return to a normal freeze cycle Water Interruption The controller will attempt to fill the reservoir every twenty minutes until it is successful On Off Switch Access All models ship with the On and Off switches front accessible If desired the On and Off switches can be covered by changing the bez...

Page 40: ...holding then press and release Off twice Empty reservoir Hold Clean button in for 3 seconds Release Pump and purge valve will be ON for 30 seconds Repeat as needed Test Mode Depress Off for 3 seconds release Then depress Clean for 3 seconds The sump will fill the first 30 seconds of the test If the sump is full it will overflow into the bin At 30 seconds the WIV will shut off and the WP will turn ...

Page 41: ...e to Clean Adjustment State and displays the current time to clean setting 2 Press the clean button repeatedly to cycle through the 4 possible settings 1 year 8760 hours 0 disabled 4 months 2920 hrs 6 months 4380 hours default 3 Press Off or leave untouched for 60 seconds to select the displayed interval November 2010 Page 18 C2448 Service Manual Control Button Use continued ...

Page 42: ...y Remove and clean water distributor Inlet water valve leaks through during freeze Check inlet water valve Connected to hot water Check for bleed thru from missing check valve in building water supply Incomplete harvest Check harvest system High pressure cut out opened Check check fan motor Check quick connects for complete piercing Fan motor not turning Check fan motor check fan blade Water pump ...

Page 43: ...is correct change compressor Debris in refrigeration system Recover charge Open quick connects check for loose or missing foil Open liquid line and hot gas valves Check for debris Replace drier evacuate and weigh in nameplate charge Shut down on maximum harvest time Ice bridge thickness too small not enough ice to open curtain Check and adjust if needed Ice bridge thickness too large ice frozen to...

Page 44: ...k harvest assist mechanism spring should retract pin Damaged evaporator Check evaporator surface Shut down on minimum freeze time Grounded ice thickness sensor or bridge too thin Check sensor for dirt and position Clean and adjust gap to evaporator surface using 7 32 drill bit as a gauge Improper water flow Check water distributor cover be sure it is sealed tightly Check clean spillway surface to ...

Page 45: ...orator superheat if significantly low or high replace TXV Long Harvest Cycle Dirty evaporator De scale water system No harvest assist Check harvest assist solenoid Bridge thickness too big Check and adjust bridge thickness Machine in very cool ambient Increase room temperature False bin full signal Ice jammed in between curtain and sump Clear ice away Curtain does not close correctly Check curtain...

Page 46: ...to the leads of the switch Open and close the curtain When the curtain is closed the switch is closed and there will be continuity a good curtain switch will have very low resistance when the curtain is closed 5 to 2 ohms A defective switch has about 100 or more ohms of resistance when the curtain is closed When the curtain is open the switch is open and the circuit will be open 3 Test the control...

Page 47: ...o the ice thickness sensor lead touch the other ohmmeter lead to the ice machine chassis There must be an open circuit If there is continuity the sensor must be replaced If there is no continuity touch the ohmmeter lead to the metal part of the ice thickness sensor There should be continuity If open check the ice thickness sensor for scale build up Clean and recheck If still open replace the ice t...

Page 48: ... remove it from the sump cover Test 1 Place one lead of the ohmmeter on the longest probe and the other on the controller end of the red wire there should be continuity Test 2 Place one lead on the controller end of the white wire and the other on the mid length probe there should be continuity Test 3 Place on lead on the controller end of the black wire and the other on the shortest probe there s...

Page 49: ... Measure the temperature of the discharge line as close to the sensor as possible Measure the resistance of the discharge temperature sensor two leads farthest away from the open socket on the harness connector and compare to the resistance in the chart for that temperature Any reading within 1000 ohms is acceptable 3 Alternate procedure Remove both water and discharge sensors from their places on...

Page 50: ...hat relay should have power when the purge light is on connecting power to one of the pumps Check for voltage from the relay to the pump If there is voltage to the pump and it does not pump water replace the pump If there is no voltage at the pump and the purge valve is working replace the dump valve relay 2 Test using an ohmmeter Disconnect electrical power Unplug the suspect water pump motor lea...

Page 51: ... holding the Off button in for 3 seconds Unplug the harness connection from the purge valve Wait four minutes Push and release the On button to restart the machine As the unit drains the reservoir the purge valve connection should receive full voltage If it does the purge valve should be replaced If there is no voltage check voltage from the controller The purge valve pin is 3 dump valve on wiring...

Page 52: ...f the high pressure cut out is closed check for voltage from the controller The contactor pin is 4 Check when the compressor indicator light is on There should be voltage If not replace the controller If there is voltage at the controller but not at the contactor coil the harness wires or connectors are damaged and must be replaced 2 Test using an ohmmeter Test the coil of the contactor for contin...

Page 53: ...n observe pressure that the pressure control opens at compare to spec Allow system to equalize observe the pressure that the pressure control closes at compare to spec Transformer Check secondary voltage it must be between 10 and 15 5 AC volts Replace if no voltage is output or if above or below the acceptable voltage Controller The controller s software operation is confirmed if it is functioning...

Page 54: ...st If there is voltage and the valve does not operate replace the valve coil If there is no voltage check the controller high voltage harness connection The liquid line solenoid lead is the top wire Check voltage at the end of the test when the Condenser Fan indicator light is On Note high voltage power is supplied to the bottom pin from the contactor line Refer to the machine wiring diagram as ne...

Page 55: ...t down by holding the Off button in for 3 seconds Unplug the harness connection from the inlet water valve Wait four minutes Push and release the On button to restart the machine After the unit drains the reservoir the inlet water valve connection should receive full voltage If it does the inlet water valve should be replaced If there is no voltage check voltage from the controller The inlet water...

Page 56: ...alve 1 Test using the controller s indicator lights If the unit is running or has been off for more than 4 minutes push and release the Harvest button The Hot Gas indicator light will be on and the hot gas valves will be energized The compressor will force discharge gas into the evaporator inlet warming it If the evaporator inlet does not warm up do a voltage check Shut the unit off by holding the...

Page 57: ...more water will drain 2 Disconnect electrical power 3 Twist counterclockwise and lift water pumps up and tip to one side 4 Remove front water reservoir cover plate set aside 5 Remove sump cover and water level sensor set sump cover aside 6 Pull water reservoir forward tip up and out of the machine November 2010 Page 34 C2448 Service Manual ...

Page 58: ...o be used as a replacement part in any of the Prodigy models in production at the time the controller was manufactured As new Prodigy models are introduced those models will be added to the list of models new service controllers will work with November 2010 Page 35 C2648 Service Manual The Service Controller includes a selector switch The switch must be set to the model the controller is being ins...

Page 59: ...2 4463 113 4367 114 4273 115 4182 116 4093 117 4006 118 3921 119 3838 120 3757 121 3678 122 3601 123 3526 124 3452 125 3381 126 3311 127 3243 128 3176 129 3111 130 3047 131 2985 132 2924 133 2865 134 2807 135 2751 136 2696 137 2642 138 2589 139 2537 140 2487 141 2438 142 2390 143 2343 144 2297 145 2252 146 2208 147 2165 148 2123 149 2082 150 2042 151 2003 152 1965 153 1927 154 1890 155 1855 156 18...

Page 60: ... 12 14 13 15 14 16 15 17 16 18 17 19 18 20 19 21 Suction Pressure PSIG End of Freeze Harvest 28 30 73 75 26 28 78 80 27 29 78 80 27 30 78 80 34 36 86 89 Discharge Pressure PSIG End of Freeze Harvest 205 210 150 155 230 235 170 175 238 243 178 183 245 250 195 190 365 370 245 255 Ice per cycle 21 lb Compressor Amps Freeze 13 2 to 12 9 declining to 9 6 at the end of the freeze cycle 11 6 to 11 9 at f...

Page 61: ... 5 Disconnect water supply tube from the inlet of the valve 6 Disconnect the water outlet tube 7 Remove the two mounting screws holding the valve to the center panel 8 Pull the valve forward and out of the machine 9 Reverse to reassemble November 2010 Page 38 C2648 Service Manual Electrical Shock Hazard Disconnect electrical power before beginning ...

Page 62: ...holding solenoid coil to upper bracket Note Upper bracket stays in unit 6 Remove bottom two screws holding bracket and solenoid to cabinet see circled area Remove coil from unit 7 Remove and replace plunger Reverse to reassemble November 2010 Page 39 C2648 Service Manual Harvest Assist Solenoid Electrical Shock Hazard Disconnect electrical power before beginning ...

Page 63: ...sensor squeeze mounting legs together to release it from the mounting bracket 9 Remove sensor follow wire back to control box 10 Disconnect from controller connection J10 11 Remove sensor from machine 12 Reverse to reassemble Set initial probe to evaporator surface gap using a 7 32 drill bit as a gauge November 2010 Page 40 C2648 Service Manual Repair Procedures Electrical Shock Hazard Disconnect ...

Page 64: ...Remove metal barrier from control box 6 Remove mounting screws holding contactor to control box 7 Exchange wires from old controller to new Refer to wiring diagram as needed Reverse to reassemble November 2010 Page 41 C2648 Service Manual Repair Procedures Electrical Shock Hazard Disconnect electrical power before beginning ...

Page 65: ...machine cabinet 8 Rotate selector switch to the proper model number for the machine the controller is being installed on 9 Install new controller on mounting bracket secure with original screws Note Be SURE the controller is snapped into place and all screws returned to their original spots 10 Attach all wires removed 11 Shut control box cover 12 Switch on the electrical power November 2010 Page 4...

Page 66: ...hold the Off button to shut the machine off 2 Disconnect electrical power 3 Remove front panel 4 Remove evaporator cover 5 Open control box 6 Locate curtain switch on evaporator mounting bracket Pull switch from its snaps 7 Dismount wires from sump cover and remove from J7 or J8 connector on control board 8 Reverse to reassemble Be sure wires are re mounted to sump cover edge November 2010 Page 43...

Page 67: ... Lift the valve and bracket up and off the keyhole slots Remove valve from cabinet 8 Remove valve from bracket 9 Reverse to reassemble 10 Push and release the On button to restart the machine Water level sensor 1 Push and hold the Off button until the machine shuts off 2 Remove the front panel 3 Locate water level sensor 4 Squeeze the locking tabs together and pull the sensor up and out of the sum...

Page 68: ... 4 Rotate the pump CCW about 1 8 turn to release it 5 Lift pump up and remove hose 6 Attach hose to new pump 7 Install in pump bracket 8 Rotate CW about 1 8 turn to lock it in place 9 Plug pump into harness 10 Return panels to their original positions and secure with the original screws 11 Push and release the ON button to restart the machine November 2010 Page 45 C2648 Service Manual Repair Proce...

Page 69: ...tributor 11 Release ice thickness sensor 12 Remove water distributor bracket from the top of the evaporator 13 Connect nitrogen bottle to discharge access port Open both access valves 14 Open nitrogen valve 15 Unsweat the inlet and outlet refrigerant tubes Use caution when heating the tubing do not damage the freezing compartment walls 16 Shut nitrogen valve November 2010 Page 46 C2648 Service Man...

Page 70: ...onnect inlet and outlet tubes by brazing the copper tubes together 23 Replace filter drier 24 Shut access valves remove nitrogen bottle 25 Evacuate to at least 300 microns 26 Weigh in the nameplate charge Check for leaks 27 Return ice thickness sensor bracket ice thickness sensor water distributor curtain and evaporator cover to their original positions 28 Reconnect electrical power 29 Return fron...

Page 71: ...cal leads 7 Remove all the mounting bolts 8 Open both discharge and suction access valves 9 Connect nitrogen to discharge access valve 10 Open nitrogen valve 11 Unsweat the suction discharge and process tubes 12 Unsweat the drier from the liquid line Remove it 13 Shut the nitrogen valve 14 Remove the compressor from the ice machine Note Some models may require the control box to be moved slightly ...

Page 72: ...ameplate charge Check for leaks 20 Reconnect electrical leads 21 Attach compressor terminal cover 22 Reconnect electrical power 23 Return sound shield and front panel to their original positions Note If the compressor is being returned for warranty braze the stubs shut and tag the compressor with the required information November 2010 Page 49 C2648 Service Manual Refrigeration Removal and Replacem...

Page 73: ... from the liquid line Remove it 10 Connect nitrogen to discharge access valve 11 Immediately place new valve in ice machine 12 Open nitrogen bottle and braze expansion valve inlet and outlet joints together Braze new drier into system 13 Shut off nitrogen shut access valves 14 Evacuate to at least 300 microns 15 Weigh in the nameplate charge Check for leaks 16 Attach bulb to suction line Position ...

Page 74: ... an adjustment knob Rotating the knob CW lowers the maximum ice level that the ice machine will maintain in the bin or dispenser When the ice level is at or above maximum for the setting the bin full light on the ultrasonic board will be ON November 2010 Page 51 C2648 Service Manual Ultrasonic control shown in its installed position set at maximum fill Ultrasonic ice level control settings 0 contr...

Page 75: ... cycle If above 40 it should do so at the beginning of freeze The easiest way to check it is as follows 1 Install the Vari Smart on the Prodigy 2 Set the Vari Smart on 32 point the arrow to the A in Adjust 3 Connect power to the unit 4 Put the unit into a Manual Harvest 5 Position something about 12 from the sensor The object should be a solid flat item like a panel or manual 6 Cycle the curtain s...

Page 76: ...the KVS Smart Board abilities include Ethernet connection USB connection to be used with Scotsman s Prodigy TechTool software Data Logging Data Display The Smart Board mounts to the control box door just below the main controller The cable connecting the two routes from the main controller Accessory connector to J1 of the Smart Board If the datalogger version is used it plugs into the Accessory co...

Page 77: ...isplay to the main menu The SmartBoard can display Alerts and Data Alerts Service ice machine soon Slow water fill Long freeze cycle Long harvest cycle High discharge temperature Note Additional information on this option is included with the instructions provided with it November 2010 Page 54 C2648 Service Manual SmartBoard Advanced Feature Control See Instructions for Available Features 34 SEL 0...

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