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BC0530 Service Manual

March 2020

Page 25

The following tables describe the general states and sequence of operation for the ice machine models in ice-

making mode with an additional table depicting the status when the ice bin is full and the cleaning mode. The

charts provide information about the inputs to the controller and the corresponding AC outputs associated with

each part of the ice making cycle.

Note: Abnormal operation of the ice machine is covered in the Fault Condition section of the manual.

Ice Making Sequence

Step 1
Fill

Step 2
Freeze

Step 3
Lower

Step 4
Harvest

Step 5
Raise

Control

Status

Bin Level Probe

Warm/Not Full

Warm/Not Full Warm/Not Full

Ice-Clean Switch

Ice

Contactor

Closed

Water Plate Switch

Down

Evaporator Temperature

Probe

N/A

Cold

Warming

Warm

Water Level Control

Low Level/

Rising

High/Level

Falling

Low

Arms-Up/Down Switches

Arms Up

Arms Lowering

Arms Down

Arms Rising

Ice

None

Forming

Fully Formed

None

Compressor (Condenser

Fan)

Water Plate

Closed

Opening

Open

Closing

Water Pump

Off

Defrost Valve

Closed/
De-energized

Open/
Energized

Closed/
De-energized

Water Valve

Open/
Energized

Closed/
De-energized

Open/
Energized

Closed/
De-energized

Open/
Energized

Actuator Motor

Off

On/CCW Rotation

Off

On/CW Rotation

Control Stream

Low

Low to High

Off

Sequence Of Operation

Содержание BC0530

Страница 1: ...Service Manual for model BC0530 ...

Страница 2: ...abinet Drawings Page 5 Placement and Guidelines Page 6 Installation Assembly Page 7 Installation Water Page 8 Installation Electrical Page 9 Installation Check List Page 10 Initial Start Up Page 11 Condenser Cleaning Page 12 Cleaning Water System Page 13 Component Location Page 14 Operational Information Page 15 Mechanical Components Page 16 Controller Page 19 Error Code Troubleshooting Page 21 Se...

Страница 3: ...the machine is operated in circumstances that exceed the limitations printed above Product Information The BC is available in a single cube size The ice size cannot be changed significantly It is a modular cuber and the ice is stored in separate insulated bin with ice level automatically maintained by the control system A back flow preventer may be required by local plumbing codes Air flow is in t...

Страница 4: ...020 Page 4 Back View Note Model and serial dataplate is on the back Ø 875 ELECTRICAL INLETS 2X EXIT OPENING FOR Ø3 4 ID FLEX TUBING DRAIN 3 4 FPT POTABLE WATER INLET 5 16 18 FOR MOUNTING 2X 27 8 5 4 1 4 29 8 2 1 8 9 17 8 C L 5 2 9 ...

Страница 5: ...2020 Page 5 Plan and Cabinet Drawings ICE DROP OPENING AIRFLOW DIRECTION FRONT LEFT RIGHT TOP 30 7 33 7 25 8 5 6 12 6 6 3 3 4 2 0 4 0 4 0 4 0 CLEARANCE FOR AIRFLOW Note Do NOT install on a bin where the ice drop opening is blocked ...

Страница 6: ...r any damage that may not be evident on the outside of the carton Contact the freight carrier immediately to report any damage and file a claim Safety Do not operate equipment that has been damaged Refer all maintenance to qualified personnel Never operate the ice maker with any covers panels or other parts removed or not properly secured Instruct all personnel in the proper use of the equipment C...

Страница 7: ...nt to seal the bin to the floor If there are gaps larger than 3 mm 1 8 install a cove molding around the bottom of the bin Note The ice drop opening and the probe opening must NOT be blocked by the storage bin walls Carefully lift the ice machine and position it on the ice storage bin The ice machine is heavy Use of a mechanical lift may be required Attach the ice machine to the ice storage bin Th...

Страница 8: ...he water is potable not laden with sediment and does not exhibit residual chlorine level greater than 0 2 ppm The use of water treatment however may increase the intervals between cleaning operations Do not connect the ice machine to a hot water supply line Insulate the water line from sources of heat or to prevent condensation Note Water temperatures higher than the recommended maximum will cause...

Страница 9: ... maker is recommended and may be required by local codes Minimum ampacity does not indicate typical running current value Refer to the equipment electrical plate Use the minimum ampacity value for sizing branch circuit conductors up to 8 meters 26 feet in length For conductor length over 8 meters increase the wire gauge as required Normal protector size is based on rated voltage and operation at l...

Страница 10: ... maximum 100 psig static pressure Are there separate drain lines for the ice maker and bin Are the ice makers and bin drains vented Is the bin thermo probe run correctly secured tested and positioned in the bin at the right level Are the electrical lines free from contact with refrigerant lines and moving parts Are the drain pan and ice chute positioned properly and is the packing tape removed Hav...

Страница 11: ...ght side of the water plate stretching the springs until the actuator motor rotates the cam arms counter clockwise Observe that the cam arms continue to turn opening the water plate fully dumping the water in the tank At this point the cam arm rotation will reverse and close the water plate The cam arm rotation will stop when the water plate is fully closed and the water fill process will repeat 4...

Страница 12: ...r flow reduces ice making capacity 1 Remove front panel and switch the machine off 2 Obtain access to the back of the machine This might require the unit to be pulled out slightly 3 Brush the surface dirt off the condenser Do NOT use a tool that could damage the fins of the condenser 4 Vacuum the back of the condenser and or blow from the inside to release any dirt Imbedded grease will require the...

Страница 13: ...4 sodium hypochlorite household bleach or equivalent and 1 quart 3 8 Liter clean water 12 Using the same process as in steps 5 8 pour half of the sanitizing solution into water level probe tube and the other half into the control stream box 13 Allow the solution to circulate for 15 minutes Pull down on the right side of the water plate to cause it to open and dump the sanitizing solution and then ...

Страница 14: ...BC0530 Service Manual March 2020 Page 14 Component Location Water Plate Water Fill Probe Controller Water Pump Water Level Control Tube Control Stream Box Water Plate Switch ...

Страница 15: ...equired Cube Information Cube Type Cube Dimensions in mm Cube Weight oz g Cubes per Cycle Full Cube 1 25 x 1 25 x 1 25 31 x 31 x 31 1 15 32 6 108 Typical Refrigerant Operating Pressures Measurement Point Approximate Low Side Suction Pressure High Side Discharge Pressure R 404a Beginning of Freeze Cycle 50 PSI 345 KPA Likely to be higher than 250 PSI 1720 KPA Just Before Defrost Cycle Begins 12 to ...

Страница 16: ...ning this strainer is frequent an external water filter should be provided Water Plate Functions as a water manifold with a flat surface and to regulate the web thickness between the cubes This surface is positioned close to the evaporator and acts to form the sixth side of the ice cubes The water plate surface has one spray hole for each cell in the evaporator to provide water to the freezing sur...

Страница 17: ...r and thereby the compressor and condenser fan motor if so equipped This position is useful for cleaning the ice machine and for test procedures where operation of the compressor is not required or desired Ice Level Probe Senses when the ice bin is full Contact between this probe and the ice in the storage bin will signal the controller to shut off the ice machine When ice is removed from the prob...

Страница 18: ...sted so there is 1 1 8 inch of blue stick sticking up out of the cap Once set no further adjustment should be needed The High Float determines how much water is taken into the system at the beginning of a cycle This side should have 1 in of blue stick sticking out of the top of the cap Pull up on right side to add water push down to decrease water It is adjusted as required and the desired fullnes...

Страница 19: ...atus of the individual sensors for the ice making process Fault Codes The electronic control will monitor for the following conditions and shut down the ice machine as required to prevent damage to the equipment 2 If the water tray automatically cycles 3 times in a row due to a water plate obstruction the controller will shut down the ice maker and provide LED fault indicators After 3 consecutive ...

Страница 20: ...arvest and water plate rising cycles Note The machine will need reset for the controller to acknowledge this change The right jumper is used to tell the controller when it is being used on a dual evaporator machine BCO530 should not have jumper on Note if you are replacing control board the new board will come with jumper on MUST BE REMOVED OR PLATE WILL NOT RISE Programming Port Used by service t...

Страница 21: ...efective Arms Up Switch stuck closed Plate stays down Bin Probe is out of position Replace Cam Arm or Cam Pin Reinstall springs or replace as needed Adjust switch actuator or replace as needed Check to ensure that the Plate Up switch actuates before the Arms Up switch actuates Lower the short water level probe in 1 16 increments until cubes have a pea sized dimple in the center Replace the Water P...

Страница 22: ...ntroller Board s AC output bus check wires P5 2 and P5 6 during Wash Mode for line voltage If rated line voltage is present and the pump s impeller is not obstructed replace faulty Water Pump Check for low refrigerant charge Replace Contactor Replace Water Valve Replace Controller Replace Hot Gas Valve 4 Rev 1 1 1 2 1 3 Freeze time less than 5 min for 3 consecutive times After the 6th attempt it w...

Страница 23: ...2 No action required Increase incoming water temp to 45F for best results Evaporator Temperature 31F during water fill only System opens Hot Gas Valve to compensate until an Evaporator temp of about 38F is reached This temp range is adjustable from about 35 46F This is not necessarily a fault condition but could indicate that the incoming water temp is very cold which can slow down ice production ...

Страница 24: ...is in Full Rinse Mode Left Jumper is pulled on Controller 9 Rev 1 3 only This is a normal condition indicating that the Bin is full Bin Probe is cold If Code 90 is indicated but Bin is not full check for faulty Bin Probe bad wiring to Bin Probe or faulty Controller Board No action required Repair wiring replace bin Probe or replace Controller Ice Bin Full A cold Bin Probe will shut down the icemak...

Страница 25: ... Warm Not Full Warm Not Full Warm Not Full Warm Not Full Ice Clean Switch Ice Ice Ice Ice Ice Contactor Closed Closed Closed Closed Closed Water Plate Switch Up Up Down Down Down Evaporator Temperature Probe N A Cold Cold Warming Warm Water Level Control Low Level Rising High Level Falling Low Low Low Arms Up Down Switches Arms Up Arms Up Arms Lowering Arms Down Arms Rising Ice None Forming Fully ...

Страница 26: ... Up or Down Up Evaporator Temperature Probe Warm or Cold Warm Water Level Control Low or High High Arms Up Down Switches Water Plate Up or Down Water Plate Up Ice None or Fully Formed None Compressor Condenser Fan Off Off Water Plate Open or Closed Closed Water Pump Off On Defrost Valve Closed Closed Water Valve Closed Closed Actuator Motor Off Off Control Stream Off Low Ice Bin Full Cleaning Mode...

Страница 27: ...he cam arm down switch is activated the water plate will stop Harvest As long as the evaporator remains cold the water plate s remain in the open position with the water solenoid valve de energized The defrost valve remains energized and the evaporator become warm enough to release the ice which drops by gravity into the ice storage area Raise After the ice is out and the evaporator warms to the r...

Страница 28: ...up the controller will switch to the Lower state If the water plate is not in the up position at start up and the evaporator temperature is warmer than the Harvest Termination temperature the controller will switch to the Raise state Cleaning Mode Start Up At power up in the wash mode the electronic control will monitor the following criteria If there is an obstruction preventing the water plate f...

Страница 29: ...ne to avoid damage to measuring devices and the risk of electrical shock Compressor Test Procedure Caution Failure to comply with all service guidelines may cause personal injury equipment or property damage and voiding of the product warranty Note When servicing ice machine refrigeration systems all work performed must be consistent with the best refrigeration service practices These systems must...

Страница 30: ...e relay must be replaced 4 The relay may also malfunction if the supply voltage is 10 higher or lower than the rated voltage or if the relay is loosely mounted allowing it to vibrate or if it is used in conjunction with an incorrect start capacitor Testing the Run Capacitor 1 Before testing the run capacitor be sure it is the one specified for use with the ice machine compressor 2 After making sur...

Страница 31: ...ay terminal 5 and compressor terminal C and also between terminals 2 and S as well as 4 and R 3 Replace the potential relay if all other tests do not reveal the problem A new relay will eliminate any electrical problems that cannot be determined with the previous testing If a new relay does not correct the operation the compressor may have a mechanical problem Note Excessive short cycling may be c...

Страница 32: ...e brace water deflector pressure pads and the four screws holding the tank to the water plate Remove plastic bolt from shoulder on water plate and place in new plate 10 1Attach the tank to new water plate with two 6 mach screws on the left side and two 10 sheet metal screws on the front and back Note The speed nuts on the front and back holes are no longer required 11 1With the open end of the wat...

Страница 33: ...switch lever back will be up When the water plate opens the cam arm turns counterclockwise until the arms down switch operator allows the arms down switch lever to drop When the water plate is fully down open the cam arm should be in the seven o clock position the spring should be aligned with the cam arm When closing again the cam arm will turn clockwise until the arms up switch operator allows t...

Страница 34: ...vaporator Temperature and Ice Level Probes The evaporator temperature probe and the ice level probe are designed to have a nominal resistance of 32 650 k ohms at 32 F 0 C To test these probes they must be placed in ice water 32 F 0 C for a minute and then checked for resistance while the tube is still in the ice water A probe is considered good if it exhibits a resistance value of 32 650 k ohms at...

Страница 35: ...nstallation instructions for spacing requirements Confirm prop er pressures High pressure cut out open on liquid cooled models Coolant liquid interrupted or insufficient Restore adequate coolant liquid supply and reset high pressure cut out Confirm proper operating pressures High pressure cut out open on liquid cooled models Interior of condenser has a mineral build up Clean or replace condenser H...

Страница 36: ...el until ice cubes are produced with small dimples Ice cubes have large dimples or are hollow at the end of the freeze cycle Batch weight is too light Increase the water level until ice cubes are produced with small dimples Evaporator grids are distorted Carefully straighten grids or replace evap orator if the damage is severe Water plate re opens immediately after closing Water plate up switch le...

Страница 37: ...otor is running continuously Defrost does not initi ate when water level drops below low water level probe Water level probe does not sense that the water level is low Be sure there is no continuity path between the probes through water or mineral deposits on the probe cap Make sure the cap is clean and dry especially after cleaning the ice machine Water level probes are OK but no voltage measured...

Страница 38: ...Cold potable water supply This is normal operation of the unit if the water supply is too cold Very cold water will not rinse the ice residue from the wa ter plate causing it to build up and affect normal operation Ice remains attached to the water plate surface at the end of defrost Ice frozen into the water plate surface Thick web between ice cubes Adjust web thickness to specifications Ice froz...

Страница 39: ...ater valve coil Test for continuity through the high level probe and the reference probe Replace the probe if the continuity is broken Water level probes test OK but line voltage measured at water valve coil Test controller and replace if defective Water valve will not open Potable water level never reaches the highwater level reach es the highwater level probe during the fill cycle No voltage mea...

Страница 40: ...rigerant charge Remove refrigerant and recharge the system to specifications Ice cubes have uneven dimples Dimples are larger on right side of evaporator be cause of high evaporator superheat Adjust the expansion valve to decrease the evaporator superheat Ice cubes have uneven dimples Dimples are larger on left side of evaporator and ice may freeze into the right side surface of the water plate be...

Страница 41: ...BC0530 Service Manual March 2020 Page 41 Wiring Diagram MODEL BC0530A 1A ...

Страница 42: ...SCOTSMAN ICE SYSTEMS 101 Corporate Woods Parkway Vernon Hills IL 60061 800 726 8762 www scotsman ice com ...

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