Scotsman CU3030 Service Manual Download Page 50

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CU1526, CU2026, CU3030
Service Manual

Wiring Diagram, CU1526 and CU2026 50 Hz after Serial Number 12021320013437

February 2012

Page 50

FUSE (3A)

LINE

LOAD

230V

BN/W

FAN CYCLING PRESSURE SWITCH (A/C ONLY)

HARVEST

ASSIST

SOLENOID 1

ICE THICKNESS PROBE

CURTAIN SWITCH 1

CURT

AIN SW

ITCH

CAUT

ION:

CR W

ILL

COMP

RESS

Y NO

T ST

ART IF

PTCR

T AL

LOWE

D TO

MOT FAN

(WHEN 2ND FAN IS PRESENT)

W/Y

(AC ONLY)

(WATER COOLED ONLY)

(AIR COOLED ONLY)

FAN MOTOR

HIGH PRESSURE CONTROL (WC ONLY)

CONTACTOR

MOT PUMP

SOLENOID

HOT GAS

WATER

USE CO

PPER

NDU

CTO

RS ON

THI

S U

NIT

BE G

ROUN

DED.

CAUT

ION:

ONE

DISC

ONNE

CT M

EAN

S M

AY B

REQU

IRED

SCON

NECT

L P

OWE

R T

O TH

IS U

NIT

17-33

74-01

RUN CAP

PTCR

POWER SUPPLY

SEE NAMEPLATE FOR PROPER VOLTAGE REQUIREMENTS AND MAXIMUM FUSE SIZE

LINE

12V

TRANSFORMER

HOT GA

S VALVE

WATER VALVE

CONTACTOR

COIL

COMPRESSOR

RUN CAP

WATER PUMP

PTCR

CONTAC

TOR T1

WATER LEVEL SENSOR

SUMP TEMP.

DISCHARGE TEMP.

R/W

BN/W

ELECTRONIC CONTROL

W/R

DUMP VALVE

HIGH PRESSURE CONTROL

MOT FAN

1 J9

FAN CYCLING PRESSURE CONTROL SWITCH (

AIR COOLED ONLY)

DISCHARGE TEMP. SENSOR

SUMP TEMP. SENSOR

WATER LEVEL SENSOR

EARTH G

ROUND

J10

HARV A

SSIST

SOLENOID

ICE THICKNESS PROBE

GN/Y

.33 uF

START WI

NDING

RUN WINDING

EXTE

RNAL

PROT

ECTO

SSOR

Summary of Contents for CU3030

Page 1: ...ation Page 23 Control Safeties Page 24 Restarts Page 25 Control Button Use Page 26 Test Mode Page 27 Service Diagnosis Page 28 Service Diagnosis Page 29 Service Diagnosis Page 30 Service Diagnosis Low ice making capacity air cooled Page 31 Cleaning Sanitation and Maintenance Page 32 Test Procedures Sensors Page 34 Sensor Testing Page 35 Thermistors Page 36 Test Procedures Loads Page 37 Test Proced...

Page 2: ...re 40o F 100o F Water pressure 20 psi 80 psi Power supply acceptable voltage ranges Minimum Maximum 115 volt model 104 volts 126 volts 230 volt model 198 volts 253 volts Warranty Information The warranty statement for this product is provided separately from this manual Refer to it for applicable coverage In general warranty covers defects in material or workmanship It does not cover maintenance c...

Page 3: ...including the use of any part and or other components not specifically approved by Scotsman Scotsman reserves the right to make design changes and or improvements at any time Specifications and design are subject to change without notice May 2008 Page 3 CU1526 CU2026 CU3030 Service Manual Dimensions w x d x h Model Electrical volts Hz phase Condenser Total Load Amps Maximum Fuse Size 26 62 x 27 5 ...

Page 4: ...ch 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 impact Additionally devices intended to enhance ice machine sanitation such as the Scotsman Aqua Bullet can be placed in the machine to keep it cleaner between manual cleanings This manual covers several models The model number o...

Page 5: ...99 0 22 12 56 2 4 00 MINIMUM UTILITY CLEARANCE 10 2 6 00 15 2 22 25 56 5 29 65 75 3 27 5 69 9 4 86 12 3 26 62 67 6 30 04 76 3 15 55 39 5 2 60 6 6 4 85 12 3 6 50 16 5 3 19 8 1 4 32 11 5 92 15 DRAIN 3 4FPT CONDWATER REGULATOR 3 8NPT W CONLY CONDDRAIN 1 2NPT W CONLY POTABLE WATERINLET 3 8FLARE POWERCORD ...

Page 6: ...25 95 65 9 4 69 11 9 30 0 76 2 30 62 77 8 4 00 MINIMUM UTILITY CLEARANCE 10 2 6 00 15 2 24 25 61 6 29 63 75 3 6 99 17 7 3 19 8 1 4 33 11 29 36 74 6 2 77 7 4 65 11 8 6 27 15 9 23 82 60 5 DRAIN 3 4FPT CONDWATER REGULATOR 3 8NPT W CONLY CONDDRAIN 1 2NPT W CONLY POTABLE WATERINLET 3 8FLARE POWERCORD ...

Page 7: ...rical power 6 Remove door open about 1 5 and pull bottom out 7 Remove the top panel there are two fasteners under the front corners of the top Back them out and lift the top up push back slightly and lift panel up and off the machine 8 Disconnect the drain tube from the bin drain fitting 9 Remove two bolts from the bottom of the bin one on the left and one on the right 10 Remove bolt from the back...

Page 8: ...nlet fittings 3 8 OD tubing is recommended Note This NSF listed model has a 1 anti back flow air gap between the float valve orifice and the highest possible reservoir water level no back flow device is required for the potable water inlet 2 Connect drain tubing to drain fittings 3 Route the drain tubing to building drain Follow local codes for air gap Drain Tubing Use rigid drain tubes and route ...

Page 9: ...e Grounded Do not use extension cords and do not disable or by pass ground prong on electrical plug Typical Ice Making Cycle Times minutes Listed times are for clean machines in proper installations Cycle length at startup will be longer until the system stabilizes Model 70o F air 50o F water 90o F air 70o F water CU1526A 22 25 36 29 CU1526W 21 24 28 31 CU2026A 15 18 25 28 CU2026W 15 18 20 23 CU30...

Page 10: ...o the 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 Low TDS non RO water Use for typical water High TDS water Very High TDS water Any with conductivity not less than 10 microSiemens cm To set 1 Switch the m...

Page 11: ... CU2026 CU3030 Service Manual Note Water cooled models the refrigeration system discharge pressure is factory set at 245 PSIG which should yield a freeze cycle discharge water temperature of about 105 110 degrees F Adjust if necessary Manual Harvest Clean Code Display Component Operation Indicator Lights Code Description Freeze Cycle flashes Freeze Cycle is Pending Harvest Cycle flashes Manual Har...

Page 12: ...n switch light is ON when a curtain is either open or not present Manual Harvest Clean Code Display Component Operation Indicator Lights Code Description Freeze Cycle flashes Freeze Cycle is Pending Harvest Cycle flashes Manual Harvest Bin is Full Clean Cycle Board Locked Test Mode Off Self Test Failed flashes Max Freeze Retrying Max Freeze Time Shut Down flashes Max Harvest Retrying Max Harvest T...

Page 13: ...or Conductivity probe Water full empty sensor Conductivity probe Bin Control Curtain Switch Ice type Unified Harvest system Hot gas defrost with mechanical assist Electrical Components Compressor Contactor Water Pump Purge or purge Valve Fan Motor s Fan motor pressure control High pressure cut out Harvest Assist Solenoid Hot Gas Valve Controller Transformer 12v AC for the controller only Water Sen...

Page 14: ... is Full C Clean Cycle L Board Locked d Test Mode O Off E Self Test Failed 1 flashes Max Freeze Retrying 1 Max Freeze Time Shut Down 2 flashes Max Harvest Retrying 2 Max Harvest Time Shut Down 3 Slow Water Fill 4 High Discharge Temp 5 Sump Temp Sensor Failure 7 Discharge Temp Sensor Failure 8 flashes Short Freeze Retrying 8 Short Freeze Thin ice Setting Codes requires push button sequence for acce...

Page 15: ...or Light Table System Indicator Light ON Condenser Fan AUX Fan Motor Powered Water Pump Pump Motor Powered Purge Valve Purge Valve Opens Inlet Water Solenoid Valve Not used this model Hot Gas Hot Gas Valve Opens and harvest assist solenoid powered Compressor Contactor Closes Ready to Harvest Water contacting ice thickness sensor probe Sump Empty Open between mid sensor and common Sump Full Closed ...

Page 16: ...st This is dependant upon the temperature of the discharge line sensor Harvest Cycle When the harvest cycle begins the controller shuts off the fan motor switches on the hot gas valve and through a parallel circuit the harvest assist solenoid After a few seconds the purge valve opens and water is drained from the reservoir Based on either the automatic purge or manual purge setting the pump and pu...

Page 17: ...s the controller switches on the hot gas valve and through a parallel circuit the harvest assist solenoid After a few seconds the purge valve opens and water is drained from the reservoir 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 float valve will open t...

Page 18: ...essor starts the hot gas valve and the harvest assist solenoid are de energized Light Information The display shows a non blinking F The Power and Status Lights will be Green The compressor fan motor water pump sump full and one or two curtain switch lights will be ON The air cooled model s fan motor will start to turn when the discharge pressure has built up to the fan pressure control s cut in p...

Page 19: ... the hot refrigerant gas passing through the evaporator serpentine The water pump and purge valve will shut off when the purge level setting time has been reached either the manual time or the automatic time The inlet water valve will remain on until it fills the reservoir The Ready to Harvest light will switch Off when the ice falls from the evaporator Harvest continues until the ice slab is ejec...

Page 20: ...an pressure control Can cycle on and off in the freeze cycle always off during harvest When the controller has energized it the indicator light will be ON but the fan will not turn unless the discharge pressure is high enough to close the high pressure control Fan s may shut off near the end of the freeze cycle to build up heat for harvest Time of shut off depends upon available heat as measured b...

Page 21: ... harvest Curtain Switch Magnetic reed switch Normally open switch is closed when magnet is nearby Switch can be connected to either J8 or J7 of controller Curtain may be removed in the freeze cycle without affecting controller operation Curtain removed during harvest will cause the controller to terminate harvest and shut the unit off Water temperature sensor Thermistor inserted into the water pum...

Page 22: ...eration in the freeze cycle High pressure cut out All models Evaporator Unified cell plate Nickel plated copper Small cube 7 8 high x 7 8 deep x 3 8 wide Medium cube 7 8 high x 7 8 deep x 7 8 wide Water System Float fed type Water reservoir contains partial water charge which is replenished during each ice making cycle Water valve Float valve Water level to be about 1 inch deep at the left end of ...

Page 23: ...r Light On when power is being supplied 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 within 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 ...

Page 24: ...stop if the curtain switch opens If this occurs again in the next three cycles the machine will 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 t...

Page 25: ... open to terminate harvest harvest will continue until the default harvest time expires Default harvest time is 3 minutes The machine will then return to a normal freeze cycle Water Interruption Water must fill the reservoir within the pre set time period If it does not the controller will all ice making to proceed The water and status lights will blink and code 3 will be displayed Controller will...

Page 26: ...ease the Harvest button to cycle through each of the last 10 error codes from most recent to oldest Clear diagnostic code Hold Clean and Harvest buttons in for 3 seconds to clear all prior codes Reset control Depress and release Off then depress and release On Start Test Mode Hold Off button in for 3 seconds Release Hold Clean button in for 3 seconds Release Lock Unlock control Hold On button in f...

Page 27: ... the output test will be complete Test Mode Sequence Table Air or Water Cooled Time seconds On Off 0 WP HGV Comp Fan PV 30 WP 10 seconds HGV Comp Fan PV 40 WP PV HGV 10 seconds Comp Fan 50 HGV Comp 5 seconds WP Fan PV 55 Comp 15 seconds HGV WP Fan PV 70 None 5 seconds All 75 HGV 10 seconds WP Comp Fan PV 85 Fan 10 seconds HGV WP Comp PV 95 None All Test Complete Change De Scale Notification Interv...

Page 28: ... thickness sensor dirty or disconnected Check ice thickness sensor probe Water distributor dirty 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 Air cooled check fan motor pressure...

Page 29: ...r windings Low refrigerant charge Add some refrigerant and restart unit If cycle time improves look for leak Hot gas valve leaks through during freeze Check hot gas valve for hot outlet during freeze Thermostatic expansion valve bulb loose Check bulb Thermostatic expansion valve producing very low or very high superheat Check evaporator superheat change TXV if incorrect Compressor inefficient Chec...

Page 30: ...n curtain does Check switch with ohmmeter Machine in very cold ambient Move machine to a warmer location Hot gas valve does not open Check hot gas valve check controller using test mode Harvest assist probe out of position ejector pin not retracted Check harvest assist mechanism spring should retract pin Damaged evaporator Check evaporator surface Fan motor stays on during harvest Check controller...

Page 31: ...too low 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 for proper swing Makes excessive noise air cooled...

Page 32: ...e the Off button 4 Remove all ice from the storage bin 5 Push and release the Clean button The yellow Clean light will blink and the display will show C The machine will drain the reservoir and refill it Go onto the next step when the reservoir has filled 6 Pour 8 ounces of Scotsman Clear 1 ice machine scale remover into the reservoir 7 Allow the ice machine scale remover to circulate in the water...

Page 33: ... solution into the reservoir 8 Circulate the sanitizer solution for 10 minutes then push and release the Clean button 9 Allow the water system to be flushed of sanitizer for at least 20 minutes then push and release the Off button 10 Push and release the On button to resume ice making 11 Return the top panel and front louvered panel to their normal position and secure with the original fasteners A...

Page 34: ... Test using the controller s indicator light Observe the Ready To Harvest light Shut the machine off Use a wire to connect the metal part of the Ice Thickness sensor to the evaporator or simply remove the Ice Thickness Sensor and touch its metal surface to the metal control box wall The Ready for Harvest light should go ON 2 Test with an Ohmmeter Disconnect electrical power Open the control box co...

Page 35: ...should be continuity Test 3 Place on lead on the controller end of the black wire and the other on the shortest probe there should be continuity If not clean the probes and recheck Temperature Sensors 1 Check controller If the sensor calibration is completely out of range the code display will read either 5 or 7 2 Check with an ohmmeter Open control box cover unplug sensor from J6 Water temperatur...

Page 36: ...112 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 ...

Page 37: ...ted to ground replace it Any time the compressor is replaced the PTCR and run capacitor should also be replaced or if the model was equipped with a potential relay start capacitor and run capacitor those should be replaced with the compressor Most Scotsman service compressors include those parts Fan motor 1 Test using the controller s indicator lights Note Fan pressure control connection must be j...

Page 38: ...serve 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 r...

Page 39: ...r off at a certain pressure and re close at a preset higher pressure High pressure cut out The high pressure cut out switch will open at a preset pressure shutting off power to the compressor contactor After the pressure has fallen to another preset level the switch will re close and the contactor coil will be energized To Test Fan Pressure Switch A Attach refrigeration gauge set to high side port...

Page 40: ...nd is low the controller should be replaced Note The coil of this valve is internally rectified will normally show infinite resistance when tested with an ohmmeter Hot Gas Valve 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 valve will be energiz...

Page 41: ...IAA 302 5 5 5 5 6 5 9 230 50 Copeland ASB14C3E IAZ 202 CU2026 115 Copeland ASE24C3E IAA 302 5 4 5 9 6 1 6 3 230 60 Copeland ASE24C3E IAV 202 230 50 Copeland ASE24C3E IAZ 202 CU3030 115 Tecumseh AKA9438ZXA 6 7 3 7 2 7 9 230 60 Tecumseh AKA9438ZXD 230 50 Tecumseh AKA9438ZXC Refrigerant Charge Model Charge R 404A Oz CU1526A 12 CU1526W 9 CU2026A 15 CU2026W 9 CU3030A 12 CU3030W 12 Superheat CU1526 20o ...

Page 42: ...25 26 27 36 37 38 39 Suction Pressure PSIG End of Freeze Harvest 36 39 105 110 36 38 115 120 Discharge Pressure PSIG End of Freeze Harvest 211 120 260 130 CU1526W Ambient Air Temp Degrees F 70 80 90 Cycle Time minutes Water Temp 50 70 80 90 Suction Pressure PSIG End of Freeze Harvest Discharge Pressure PSIG End of Freeze Harvest 235 250 235 250 235 250 Batch weight 3 lb per cycle ...

Page 43: ...19 20 21 25 26 27 28 Suction Pressure PSIG End of Freeze Harvest 33 34 100 105 35 36 125 130 Discharge Pressure PSIG End of Freeze Harvest 235 135 305 165 CU2026W Ambient Air Temp Degrees F 70 80 90 Cycle Time minutes Water Temp 50 70 80 90 Suction Pressure PSIG End of Freeze Harvest Discharge Pressure PSIG End of Freeze Harvest 235 250 235 250 235 250 Batch weight 3 lb per cycle ...

Page 44: ... Pressure PSIG End of Freeze Harvest 25 26 84 85 29 30 100 105 Discharge Pressure PSIG End of Freeze Harvest 220 170 270 200 CU3030W Ambient Air Temp Degrees F 70 80 90 Cycle Time minutes Water Temp 50 70 80 90 12 13 15 Suction Pressure PSIG End of Freeze Harvest 25 26 80 25 26 85 90 Discharge Pressure PSIG End of Freeze Harvest 235 250 150 160 235 250 235 250 165 175 Batch weight is about 3 lb pe...

Page 45: ...O THIS UNIT MORE THAN ONE DISCONNECT MEANS MAY BE 17 3195 01 CAP RUN PTCR POWER SUPPLY AND MAXIMUM FUSE SIZE PROPER VOLTAGE REQUIREMENTS SEE NAMEPLATE FOR L1 L2 230 60 1 UNITS N 115 60 1 UNITS LINE 12V TRANSFORMER HOT GAS VALVE WATER VALVE COIL CONTACTOR COMPRESSOR CAP RUN PUMP WATER PTCR CONTACTOR T1 SENSOR LEVEL WATER TEMP SUMP TEMP DISCHARGE ELECTRONIC CONTROL BN W BU W BK W O R W V BN W CONTRO...

Page 46: ... THAN ONE DISCONNECT MEANS MAY BE REQUIRED TO DISCONNECT ALL POWER TO THIS UNIT 17 3373 01 RUN CAP PTCR POWER SUPPLY SEE NAMEPLATE FOR PROPER VOLTAGE REQUIREMENTS AND MAXIMUM FUSE SIZE L1 N LINE 12V TRANSFORMER HOT GAS VALVE WATER VALVE CONTACTOR COIL COMPRESSOR RUN CAP WATER PUMP PTCR CONTACTOR T1 WATER LEVEL SENSOR SUMP TEMP DISCHARGE TEMP ELECTRONIC CONTROL BN W BU W BK W O R W V BN W ELECTRONI...

Page 47: ... UNIT MUST BE GROUNDED CAUTION MORE THAN ONE DISCONNECT MEANS MAY BE REQUIRED TO DISCONNECT ALL POWER TO THIS UNIT 17 3123 01 RUN CAP PTCR POWER SUPPLY SEE NAMEPLATE FOR PROPER VOLTAGE REQUIREMENTS AND MAXIMUM FUSE SIZE L1 N 115 60 1 UNITS L2 230 60 1 UNITS LINE 12V TRANSFORMER HOT GAS VALVE WATER VALVE CONTACTOR COIL COMPRESSOR RUN CAP WATER PUMP PTCR CONTACTOR T1 WATER LEVEL SENSOR SUMP TEMP DIS...

Page 48: ...MP RUN CAP COMPRESSOR CONTACTOR COIL WATER VALVE HOT GAS VALVE TRANSFORMER 12V LINE N L1 SEE NAMEPLATE FOR PROPER VOLTAG E REQUIREMENTS AND MAXIMUM FUSE SIZE POWER SUPPLY PTCR RUN CAP 17 3375 01 MORE THAN ONE DISCONNECT MEANS MAY BE REQUIRED TO DISCONNECT ALL POWER TO THIS UNIT CAUTION THIS UNIT MUST BE GROUNDED USE COPPER CONDUCTORS ONLY PROTECTOR INTERNAL R BK W COMPRESSOR R3 S2 C1 TERMINAL BOX ...

Page 49: ...ATER COOLED ONLY AIR COOLED ONLY FAN MOTOR Y HIGH PRESSURE CONTROL WC ONLY L1 T1 L2 T2 CONTACTOR MOT PUMP SOLENOID SOLENOID HOT GAS WATER RUN CAP PTCR POWER SUPPLY SEE NAMEPLATE FOR PROPER VOLTAGE REQUIREMENTS AND MAXIMUM FUSE SIZE L1 L2 LINE 12V TRANSFORMER HOT GAS VALVE WATER VALVE CONTACTOR COIL COMPRESSOR RUN CAP WATER PUMP PTCR CONTACTOR T1 WATER LEVEL SENSOR SUMP TEMP DISCHARGE TEMP ELECTRON...

Page 50: ...T MUST BE GROUNDED CAUTION MORE THAN ONE DISCONNECT MEANS MAY BE REQUIRED TO DISCONNECT ALL POWER TO THIS UNIT 17 3374 01 RUN CAP PTCR POWER SUPPLY SEE NAMEPLATE FOR PROPER VOLTAGE REQUIREMENTS AND MAXIMUM FUSE SIZE L1 L2 LINE 12V TRANSFORMER HOT GAS VALVE WATER VALVE CONTACTOR COIL COMPRESSOR RUN CAP WATER PUMP PTCR CONTACTOR T1 WATER LEVEL SENSOR SUMP TEMP DISCHARGE TEMP ELECTRONIC CONTROL BN W ...

Page 51: ...IC CONTROL W BK BN W V R W O W BK W BU W BN ELECTRONIC CONTROL DISCHARGE TEMP SUMP TEMP WATER LEVEL SENSOR CONTACTOR T1 PTCR WATER PUMP RUN CAP COMPRESSOR CONTACTOR COIL WATER VALVE HOT GAS VALVE TRANSFORMER 12V LINE L2 L1 SEE NAMEPLATE FOR PROPER VOLTAGE REQUIREMENTS AND MAXIMUM FUSE SIZE POWER SUPPLY PTCR RUN CAP R BK W COMPRESSOR R3 S2 C1 TERMINAL BOX WATER HOT GAS SOLENOID SOLENOID MOT PUMP CO...

Page 52: ... CONTACTOR COIL WATER VALVE HOT GAS VALVE TRANSFORMER 12V LINE L2 L1 SEE NAMEPLATE FOR PROPER VOLTAGE REQUIREMENTS AND MAXIMUM FUSE SIZE POWER SUPPLY PTCR RUN CAP 17 3376 01 MORE THAN ONE DISCONNECT MEANS MAY BE REQUIRED TO DISCONNECT ALL POWER TO THIS UNIT CAUTION THIS UNIT MUST BE GROUNDED USE COPPER CONDUCTORS ONLY PROTECTOR INTERNAL R BK W COMPRESSOR R3 S2 C1 TERMINAL BOX WATER HOT GAS SOLENOI...

Page 53: ... water 9 Reach in sump and remove water pump discharge hose 10 Reach from top rotate water pump CCW until it is in the release position then pull the pump up and out 11 Pull up on the water pump float bracket It is not necessary to remove the bracket but it must be raised about an inch to allow the back wall of the reservoir to clear the float shield 12 Pull water reservoir forward and down into t...

Page 54: ...om the pump bracket 6 Push in release ring on water fitting and pull water inlet tube out 7 Disconnect electrical connection from pump motor 8 Remove discharge hose from pump 9 Lift up on pump bracket to release it from the back wall Pull forward and out of the machine 10 Remove one screw holding the reservoir to the evaporator bracket at the right 11 Reservoir will drain into storage bin 12 Push ...

Page 55: ... down into the storage bin 9 Remove float valve from pump bracket replace with new part CU3030 1 Top panel removal will aid in this procedure 2 Remove left grill 3 Push and hold the Off button until the unit stops or a O appears in the code display 4 Push and hold the Clean button until a appears in the code display The pump will drain the reservoir 5 Push in two tabs and release reservoir from pu...

Page 56: ...ch in sump and remove water pump discharge hose 7 Reach from top rotate water pump CCW until it is in the release position then pull the pump up and out CU3030 1 Disconnect electrical power 2 Disconnect electrical connection from pump motor 3 Remove discharge hose from pump 4 Rotate water pump CCW until it is in the release position then pull the pump up and out Electrical Shock Hazard Disconnect ...

Page 57: ...d plunger can be taken out 6 Remove screws holding valve to mounting bracket 7 Remove inlet and outlet hoses 8 Remove valve from cabinet 9 Reverse to reassemble Water level sensor 1 Switch the machine off 2 Remove the top panel 3 Locate water level sensor 4 Squeeze the locking tabs together and pull the sensor up and out of the sump 5 Unplug the electrical connection from the sensor 6 Reverse to r...

Page 58: ... fan blade replace blade at this point and reverse to reassemble Note Fan blade mounts so it is cupped to blow air into condenser See photo 6 Remove mounting screws securing fan motor to brackets 7 Replace fan motor 8 Attach fan blade to motor 9 Return brackets to motor 10 Reattach fan motor assembly to shroud 11 Reconnect fan motor 12 Return bin to chassis 13 Reconnect power restart unit Check op...

Page 59: ... 11 Connect nitrogen to discharge access valve 12 Immediately place new valve in ice machine 13 Open nitrogen bottle and braze expansion valve inlet and outlet joints together Braze new drier into system 14 Shut off nitrogen shut access valves 15 Evacuate to at least 300 microns 16 Weigh in the nameplate charge Check for leaks 17 Attach bulb to suction line Position at 4 or 8 o clock on the tube S...

Page 60: ...onnect nitrogen to discharge access valve 11 Open nitrogen valve 12 Unsweat the suction discharge and process tubes 13 Unsweat the drier from the liquid line Remove it 14 Shut the nitrogen valve 15 Remove the compressor from the ice machine Note Some models may require the control box to be moved slightly to allow compressor replacement 16 Immediately place new compressor in ice machine 17 Open ni...

Page 61: ...er distributor 9 Release ice thickness sensor 10 Remove water distributor bracket from the top of the evaporator 11 Connect nitrogen bottle to discharge access port Open both access valves 12 Open nitrogen valve 13 Unsweat the inlet and outlet refrigerant tubes Use caution when heating the tubing do not damage the freezing compartment walls 14 Shut nitrogen valve 15 Remove mounting screws holding ...

Page 62: ...20 Reconnect inlet and outlet tubes by brazing the copper tubes together 21 Replace filter drier 22 Shut access valves remove nitrogen bottle 23 Evacuate to at least 300 microns 24 Weigh in the nameplate charge Check for leaks 25 Return ice thickness sensor bracket ice thickness sensor water distributor curtain and evaporator cover to their original positions 26 Reconnect electrical power 27 Retur...

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Scotsman CU3030, Service Manual

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