Service Manual - Scotsman Ice Systems
Contents
1. Water solenoid valve not opening Replace valve Water leak in sump area Locate and repair Water flow control plugged Remove and clean July 2007 Page 12 CU0515 Service Diagnosis SYMPTOM POSSIBLE CAUSE SUGGESTED CORRECTION Irregular cubes size amp some cloudy Some jets plugged Remove jet cover and clean Shortage of water See shortage of water Unit not leveled Level as required Poor pumping Check and or replace the water pump Cubes too large Cube size control set improperly Check and adjust for proper operation Decreased ice capacity Inefficient compressor Replace Leaky water valve Repair or replace Non condensable gas in system Purge the system Poor air circulation or excessive hot location Relocate the unit or provide for more ventilation Overcharge of refrigerant Correct the charge Capillary tube partially restricted Recover charge add new gas amp drier after evacuating system with vacuum pump Undercharge of refrigerant Charge to data plate indication Discharge head pressure too high See incorrect discharge pressure Clogged air filter Clean or replace Poor harvest Restriction in incoming water line Check water valve strainer and flow control If necessary enlarge the flow control orifice Too short defrost time Check temperature cont2. control box B Switch the cleaning switch to the cleaning position This will close the electrical circuit to the water inlet valve and to the hot gas valve C Switch the power ON and push the green button switch Unit will start up in charging cycle mode During this cycle the components energized are eWater Inlet Solenoid Valve e Hot Gas Solenoid Valve eWater Pump eFan Motor D Operate the unit in the water charging cycle for about three four minutes till water flows out from the drain hose then move the cleaning switch to the operation position CU0515 NOTE During the charging cycle the water inlet solenoid valve is energized The water flows through the valve to the back side of the evaporator platen and then down to fill up the ice machine sump for the next freezing cycle Front View With Front Panel Removed July 2007 Page 6 CU0515 Operational Checks E The unit now starts its first freezing cycle with the following components in operation e Compressor eWater Pump eFan Motor F Look through the ice discharge opening and confirm that the spray system is correctly seated and that the water jets uniformly reach the interior of the inverted cup molds also make sure that the plastic curtain is hanging freely and excessive water is not flowing through it G During the freeze cycle the evaporator will remove heat from the water sprayed into the ice making molds and warm air will be discha
3. 2 Remove the front panel of the unit and inspect for any concealed damage Notify carrier of your claim for the concealed damage 3 Check that refrigerant lines do not rub against or touch other lines or surfaces and that the fan blade moves freely 4 Check that the compressor fits snugly onto all its mounting pads 5 Remove all internal support packing and masking tape Model Electrical volts Hz phase Fuse Size Condenser Type Refrigerant Charge CU0515GA 1A _ 115 60 1 15 Forced Air 9 5 oz R 134a 15 3 16 28 7 8 23 5 8 Door Opening 12 1 8 wide by 8 1 4 tall N c fo o c Ro gt i I I F 5 8 Legs adjust to 113 16 6 from base 3 1 16 May 2010 Page 2 CU0515 General Information And Installation This model is supplied from the factory completely pre wired and require only electrical power connections to the wire cord provided at rear of the unit Make sure that the ice machine is connected to its own circuit and individually fused see data plate for maximum fuse size This is a cord connected unit designed for 115 volt AC power with a maximum fuse size of 15 amps Low voltage can cause improper operation and may be responsible for serious damag
4. 4 Evaporator Thermostat contacts 3 2 Bin Thermostat e HARVEST CYCLE Electrical components ON OFF Compressor Water Pump e Fan Motor Air cooled only Hot Gas Valve Inlet Water Valve Electrical Controls CLOSE OPEN Evaporator Thermostat contacts 3 4 Evaporator Thermostat contacts 3 2 Bin Thermostat February 2008 Page 9 Freeze Cycle Average Discharge Pressure e A C 100 to 155 PSIG Suction Pressure e End Freeze Cycle 0 to 1 5 PSIG Refrigerant Metering Device e Capillary tube Refrigerant Charge R 134a 9 5 oz The thermostat sensing bulb is located into a plastic tube bulb holder secured by two clips directly to the evaporator serpentine This control determines the length of the freezing cycle and correspondingly the size of the cubes A lower setting will produce a larger cube oversize while a higher setting a smaller cuber shallow size When closed on contacts 3 2 adjustable between 7 6 F and 11 5 F it activates the defrost or harvest cycle components The cube size control is pre set at the factory knob in the black dot position and doesn t require any adjustment when the ambient temperature remains between 15 and 30 C 60 and 90 F Harvest continues until the thermostat warms up to about 36 F where the unit switches back into a freeze mode Cycle Times Listed information is for new clean machines in a stabiliz
5. is not available use tap water always in the counter flow air direction Once cleaned shake it so to remove most of the accumulated water then dry it using an hair dryer NOTE In case the air filter strainer is damaged replace it with a new one 4 Return the front panel to its normal position 5 Install filter by pushing it through the front panel opening July 2007 Page 14 CU0515 Cleaning Water System 1 Remove the ice from the bin 2 Remove the air filter and then the front panel 3 Rotate control knob counter clockwise to the Off position 4 Turn off the water supply to the ice machine 5 Remove top panel 6 Remove plastic panel evaporator cover that covers evaporator section 7 Remove clamp and drain cap from the bottom of the reservoir allow all the water to drain out Remove Drain Cap 8 Return the drain cap and clamp to their original positions 9 Mix approximately 3 ounces 1 10 liter of Scotsman Clear 1 Scale Remover with 1 5 quarts 1 5 liter of warm 95 115 F potable water and pour this solution over the evaporator section bright metal tubing and inverted cups in white plastic tray at the top of the ice machine ACAUTION Ice machine cleaner contains acids Acids can cause burns If concentrated cleaner comes in contact with skin flush with water If swallowed do NOT induce vomiting Give large amounts of water or milk Call Physician immediately Keep out
6. of the reach of children 10 Return the evaporator cover removed in step 6 to its normal position 11 Rotate the control knob to the Normal position Pour Scale Remover Over The Evaporator Section 12 Operate the machine with the cleaning toggle switch in the Operation position for 5 minutes 13 Switch the cleaning toggle switch to the Cleaning position and operate the machine for 1 minute 14 Repeat steps 12 and 13 three times After the third time rotate the control knob counter clockwise to the Off position 15 Remove evaporator cover Pour hot water over the entire surface of the evaporator section Return evaporator cover to its original position 16 Pour hot water into the bin to melt any ice produced during cleaning and to clean out the drain Wipe the interior of the bin with mild soap and hot water rinse with cold water To sanitize mix a locally approved sanitizer solution and perform steps 17 31 A possible sanitizer solution may be obtained by mixing 1 ounce of household bleach with 2 gallons of warm 95 115 F water 17 Remove plastic panel evaporator cover that covers evaporator section 18 Remove clamp and drain cap from the bottom of the reservoir allow all the water to drain out 19 Return the drain cap and clamp to their original positions 20 Pour sanitizer solution over the evaporator section bright metal tubing and inverted cups in white plastic tray at the
7. top of the ice machine 21 Spray or wash the bottom of the evaporator cover and the edges of the evaporator section with the sanitizing solution July 2007 Page 15 22 Return the evaporator cover removed in step 17 to its normal position 23 Rotate the control knob to the Normal position 24 Operate the machine with the cleaning toggle switch in the Operation position for 4 minutes 25 Switch the cleaning toggle switch to the Cleaning position and operate the machine for 1 minute 26 Repeat steps 23 and 24 five times After the fifth time rotate the control knob counter clockwise to the Off position 27 Remove evaporator cover Pour sanitizer solution over the entire surface of the evaporator section and wash or spray the evaporator cover bottom with sanitizer Return evaporator cover to its original position 28 Remove curtain remove clamp and drain cap from the bottom of the reservoir allow all the water to drain out Return the drain cap and clamp to their original positions Remove Curtain CU0515 29 Thoroughly spray or wipe the interior of the ice storage bin bottom of the evaporator cover and the spray platform with the sanitizing solution 30 Completely immerse the curtain in the sanitizing solution 31 Return the evaporator cover and curtain to their original positions 32 Reconnect water supply 33 Rotate control knob to its original position Switch the cleaning toggle switch to
8. CU0515 INTRODUCTION This manual provides the specifications and the step by step procedures for the installation startup operation maintenance and cleaning for the CU0515 ice machine NOTE To retain the safety and performance built into this ice machine it is important that installation and maintenance be conducted in the manner outlined in this manual Table of Contents July 2007 Page 1 Specifications The ice machine must be installed indoors in a controlled environment Minimum Maximum Air Temp 50 F 95 F Water Temp 40 F 100 F Water Pressure 20 PSI 80 PSI Voltage 103 5 126 5 Operating the ice machine outside of the above limitations or outdoors is potentially damaging to the machine and it is misuse of the machine This may void the warranty Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance They meet or exceed the standards of agencies like NSF and UL Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman hat have been altered in any way including the use of any part and or other components not specifically approved by Scotsman CU0515 Scotsman reserves the right to make design changes and or improvements at any time Specifications and design are subject to change without notice UNPACKING AND INSPECTION 1 Call your authorized SCOTSMAN Distributor or Dealer for proper installation
9. ctrical connections Check wiring Red Alarm light ON Too Hi Condensing Temperature Reset the machine Push amp hold the Reset Button for 5 seconds and check for reason why Red Alarm light Blinking Twice Condenser sensor out of order Replace it and repeat Compressor cycles intermittently Low voltage Check circuit for overloading Check voltage at the supply to the building If low contact the power company Non condensable gas in system Purge the system Dirty condenser Clean with vacuum cleaner air or stiff brush DO NOT use wire brush Air circulation blocked Allow sufficient air space all around unit Compressor starting device loose wires Check for loose wires in starting device Cubes too small Cube size control set improperly Check and adjust for proper operation Capillary tube partially restricted Recover charge add new gas amp drier after evacuating system with vacuum pump Moisture in the system Same as above Shortage of water See remedies for shortage of water Shortage of refrigerant Check for leaks amp recharge Cloudy cubes Shortage of water See remedies for shortage of water Dirty water supply Use water softener or water filter Accumulated impurities Use SCOTSMAN Ice Machine scale remover Shortage of water Water spilling out through curtain Check or replace curtain
10. e to the overload switch and motor windings that is not covered by warranty NOTE All external wiring should conform to national state and local standards and regulations Check voltage on the line and the ice maker s data plate before connecting the unit Extension cords must not be used Location If the unit is built into a cabinet with no side ventilation the ice production will be reduced by 20 of rated capacity restricted space of an inch or so on each side will cause a 10 reduction Six inches of space to the left and right will allow the unit to operate satisfactorily The daily ice making capacity is directly related to the condenser air inlet temperature water temperature conditions of the condenser air filter and age of the machine To keep your SCOTSMAN CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on Maintenance and Cleaning section of this manual Warranty 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 corrections to installations or situations when the machine is operated in circumstances that exceed the limitations printed in this manual MNS FT July 2007 Page 3 Water Supply And Drain Connections General When choosing the water supply for the ice cube
11. ed situation Some unit to unit and cycle to cycle variation is normal 90 F 70 F 32 C 21 C Freezing time 20 to 21 minutes Harvest time 1 15 to 1 30 minutes Total time 21 30 to 23 minutes Weight 1 Ib Water Drain 1 qt water 70 F 50 F 21 C 15 C Freezing time 17 30 to 18 minutes Harvest time 1 30 to 1 45 minutes Total time 19 to 19 30 minutes Weight 1 Ib Water Drain 1 6 qt water CU0515 Fan Motor The fan motor is electrically connected in parallel to the water pump and it operates continuously only during the freezing cycle keeping the proper head pressure by circulating air through the condenser fins Compressor The hermetic compressor is used to circulate refrigerant throughout the entire system It compresses the low pressure refrigerant vapor causing its temperature to rise and become high pressure hot vapor hot gas which is then released through the discharge valve Water Spray System Sprays the water into each individual cup to be frozen into ice August 2012 Page 10 CU0515 Cleaning Switch Located on the bottom side of the control box it is used to energize the water inlet and the hot gas valves to fill the sump of the machine with water when needed Green Master Switch Push Button Located in the front of the machine it s used to switch ON and OFF the unit by pushing its green push button When ON its green light is ON Red Alarm Re Set Push Button Located in the fro
12. hat the ice machine is leveled in side to side and in front to rear directions 3 Check for water leaks and tighten drain line connections Pour water down bin drain line to be sure that drain line is open and clear 4 Check size condition and texture of ice cubes Perform adjustment of cube size control as required 5 Check the bin thermostat to test shut off Put a scoop full of ice cubes in contact with the bin thermostat bulb for at least one minute This should cause the ice maker to shut off Within few seconds after the removal of the ice from bin thermostat bulb the ice machine restarts NOTE Within minutes after the ice is removed from the bulb holder tube the sensing bulb inside the tube will warm up and cause the ice machine to restart This control is factory set and should not be reset until testing is performed 6 Check for refrigerant leaks NOTE Standard equipped with an air condenser filter as well as a Cleaning Reminder Board to remind to the end user the need for the cleaning of the air filter or of the water system Red Alarm Light ON Steady or Blinking respectively with machine in operation CU0515 Clean Replace Of Air Condenser Filter 1 Withdraw the air filter from the front through the opening of the front panel 2 Remove the front panel 3 Blow pressurized air on the opposite direction of the condenser air flow so to remove the dust accumulated If pressurized air
13. learance around the unit for proper air circulation 3 Is the unit level IMPORTANT 4 Have all the electrical and plumbing connections been made and is the water supply shut off valve open 5 Has the voltage been tested and checked against the data plate rating 6 Has the water supply pressure been checked to ensure a water pressure of at least 20 psi 7 Check all refrigerant lines and conduit lines to guard against vibrations and possible failure 8 Have the bolts holding the compressor down been checked to ensure that the compressor is snugly fitted onto the mounting pads 9 Have the bin liner and cabinet been wiped clean 10 Has the owner user been given the User Manual and been instructed on the importance of periodic maintenance checks 11 Has the Manufacturer s registration card been filled in properly Check for correct model and serial number against the serial plate and mail the registration card to the factory 12 Has the owner been given the name and the phone number of the authorized SCOTSMAN Service Agency serving him AA AY LA Connect Power Water and Drain Level the cabinet July 2007 Page 5 Operating Instructions Start Up After having correctly installed the ice maker and completed the plumbing and electrical connections perform the following Start up procedure A Remove the condenser air filter then remove the front panel Locate the cleaning switch on the
14. nt of the machine just beside the Master Switch it works in conjunction with the Cleaning Remind Board and it s activated when 1 ON steady with machine in OFF mode Condensing temperature is higher then 70 C or 158 F air cooled version 2 Blinking twice and repeat with machine in OFF mode Condenser sensor out of order 3 ON steady with machine in ON mode Condenser air filter needs to be cleaned 4 Slow blinking with machine in ON mode Water system needs to be cleaned In the first case the machine can be Re Set by pushing and holding the Red Alarm Re Set Button for 5 seconds till the Red Light is OFF In the second case first replace the condenser sensor then push and hold the Red Re Set Button for 5 seconds Cleaning Reminder PC Board Located on the front left side of the machine it works in conjunction with the condenser sensor and the Red Alarm Re Set Push Button It consists of e Printed Circuit Board with a step down transformer 115V 12V e Relay e Dip Switch with two keys e Jumper for the set up of the Cut OFF Alarm condensing temperature 700C 1580F jumper OUT for air cooled egreen four wire connector for power IN and OUT e Red socket for the Water Level Sensor future use e Black socket for the Condenser Sensor and White socket for the Red Alarm Re Set Push Button The main function of this PC Board is to switch the machine OFF when the condensing temperature is too high
15. or signal the need for cleaning the condenser air filter or the water system The time between the signal for the cleaning of the water system can be modified according to the setting of the two Dip Switches as below Time 1 2 1 Month On On 3 Months Off On 6 Months On Off 1 Year Off Off Once the water system has been cleaned push and hold the Red Alarm Re Set Button for more then 20 seconds until it starts to blink That will reset the control Condenser Air Filter It is located in front of the air cooled condenser It can be removed by pulling it through the opening in the front panel for cleaning or replacing A lower plastic guide installed inside the unit is used for the correct sliding and location of the air filter Condenser Sensor The condenser temperature sensor probe located within the condenser fins detects the condenser temperature variations and signals them by supplying current at low voltage to the P C BOARD In case the condenser temperature rises and reaches 70 C 160 F the control system will cause an immediate and total stop of the machine s operation July 2007 Page 11 Service Diagnosis CU0515 SYMPTOM POSSIBLE CAUSE SUGGESTED CORRECTION Unit will not run Blown fuse Replace fuse amp check for cause of blown fuse Main switch in OFF position Turn switch to ON position Bin thermostat set improperly Adjust rotating its setting screw Loose ele
16. r consideration should be given to a Length of run b Water clarity and purity c Adequate water supply pressure Low water pressure below 20 psi may cause a malfunction Water containing excessive minerals will tend to produce cloudy colored ice cubes plus scale build up on parts of the water system Water Supply The recommended water supply line is a 3 8 o d copper tube the water pressure must have a minimum incoming pressure of 20 psig Connect the tubing to the 3 4 GAS BSPP thread water inlet fitting at the back of the ice maker An adapter is available the part numbers are F733219 03 and F640134 00 CU0515 Water Drain The recommended drain tube is a plastic or flexible tube with 18 mm 3 4 I D which runs to an open trapped and vented drain Note Although soft easily kinked vinyl tubing is not recommended for a drain a short length of ID vinyl tubing is required to connect a rigid drain tube to the 20 mm 25 32 fitting on the back of the machine NOTE The water supply and the water drain must be installed to conform to the local code In some case a licensed plumber and or a plumbing permit is required Water Drain Connection Back View of Utility Connections July 2007 Page 4 CU0515 Final Check List 1 Is the unit in a room where ambient temperatures are above a minimum of 100C 50 F even in winter months 2 Is there at least a 15 cm 6 c
17. rged from the cabinet H When the evaporator temperature reaches a preset value 7 6 F to 11 5 F the evaporator thermostat or cube size control changes its contacts the freezing cycle ends and starts the defrost or harvest cycle Freezing time will range between 20 and 22 minutes in a 70 F ambient temperature Longer time for temperature above shorter when below Average complete cycle range is about 23 to 25 minutes I Check during the first defrost harvest cycle that the incoming water flows correctly into the sump to re fill it and the surplus overflows through the overflow drain tube J Check the size and shape of the ice cubes just released Right size must have a small depression about 3 16 in their crown If not wait for the second defrost harvest cycle before performing any adjustment K If required adjust the length of the freezing cycle by turning the knob of the cube size control or evaporator thermostat located in front of the control box until the correct ice cube size is achieved If the ice cubes are shallow and cloudy it is possible that the ice maker runs short of water during the end of the freezing cycle or the quality of the supplied water requires the use of an appropriate water filter or conditioner L During the defrost or harvest cycle hold a handful of ice cubes against the bulb of the storage bin thermostat the ice machine switch OFF in about one two minutes Remove the ice f
18. rol Replace if necessary Cube size control set for too large Re set cube size control Water inlet valve not opening Valve coil with open winding Replace valve Hot gas valve orifice restricted Replace hot gas valve assy Air vented holes in mold cups plugged Clean out holes Discharge head pressure too low See incorrect discharge pressure Unit won t harvest Inoperative cube size control Replace cube size control Hot gas valve not opening Valve coil with open winding Replace valve Water solenoid valve not opening Valve coil with open winding Replace valve Incorrect discharge pressure Dirty air filter Clean or replace Inoperative hi press control Replace Excessive water in unit base Water tubing leaking Check Tighten or replace July 2007 Page 13 Maintenance And Cleaning Instructions GENERAL The periods and the procedures for maintenance and cleaning are given as guides and are not to be construed as absolute or invariable Cleaning especially will vary depending upon local water and ambient conditions and the ice volume produced and each ice machine must be maintained individually in accordance with its particular location requirements Ice Machine The following maintenance should be scheduled at least two times per year on these ice machines 1 Check and or replace the water filter if used 2 Check t
19. rom the storage bin thermostat The ice maker should restart automatically in three four minutes NOTE The bin thermostat is factory set at 1 C 35 F OUT and 4 C 39 F IN M Re attach the front panel then instruct the owner user on the general operation of the ice machine and about the cleaning and care it requires Small Indent Normal Size and Shape Shallow Cube j Cube too Small Thick Bulge Oversized August 2012 Page 7 CU0515 Component Description Water Pump The water pump operates continually throughout the freezing cycle The pump forces the water from the sump to the spray system and through the spray nozzles so it sprays into the inverted cup molds to be frozen into crystal clear ice cubes Water Inlet Solenoid Valve The water inlet solenoid valve is energized only during the defrost cycle When energized it allows a metered amount of incoming water to flow over the evaporator cavity to assist the hot gas in defrosting the ice cubes The water running over the evaporator cavity drops by gravity through the weep holes of the platen into the sump Hot Gas Solenoid Valve The hot gas solenoid valve consists basically in two parts the valve body and the valve coil Located on the hot gas line this valve is energized Water Circuit Freeze Cycle by the contacts 3 2 of the evaporator thermostat during the defrost cycle During the defrost cycle the hot gas valve coil is activa
20. ted so to attract the hot gas valve piston in order to give way to the hot gas discharged from compressor to flow directly into the evaporator serpentine to defrost the formed ice cubes Bin Thermostat The bin thermostat control body is located in the front of control box behind the front louvered panel The thermostat sensing tube is located into a bulb holder on the side wall of the ice storage bin where it automatically shuts the ice machine OFF when in contact with the ice and re starts the ice machine when the ice is removed Factory settings are 10C 35 F OUT and 40C 39 F IN Cube Size Control Evaporator Thermostat errerceoceovee 0 g The cube size control evaporator thermostat body is located in the front of control box behind the front louvered panel it s basically a reverse acting temperature control which closes contacts 3 2 when its temperature decreases and closes the opposite contacts 3 4 when the temperature rises Water Circuit Harvest Cycle July 2007 Page 8 CU0515 Operation Electrical Sequence The following charts illustrate which switches and components are ON or OFF during the two phases of the icemaking cycle Refer to the wiring diagram for reference FREEZING CYCLE Electrical components ON OFF Compressor Water Pump Fan Motor Hot Gas Valve Inlet Water Valve Electrical Controls CLOSE OPEN Evaporator Thermostat contacts 3
21. the Cleaning position for two minutes and then switch it to the Operation position Operate the machine until one batch of ice has been released into the bin Pour warm water over the ice to melt it 34 Return the front panel to its original position and secure with the original screws July 2007 Page 16 R Scotsman SCOTSMAN ICE SYSTEMS 775 Corporate Woods Parkway Vernon Hills IL 60061 800 533 6006 www scotsman ice com 17 3188 01 En vu d
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