Welbilt FB081TF Service Manual Download Page 77

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Part Number REV00 04/08/2020 77

Section 7

Component Check Procedures

Refrigerated Cabinet

TEMPERATURE THERMISTOR - NOZZLE & CABINET PROBES ONLY
Location

• Nozzle Thermistor - Behind the front fascia inside the

duct area connected to the product line.

• Cabinet Thermistor - Attached to the evaporator plate in

the base unit.

• Defrost Thermistor - Inserted into the evaporator coil.

Function

Supplies input to the SRB board to indicate nozzle, cabinet

or defrost temperature. The SRB board energizes and

de-energizes the compressor based on input from the

thermistors.

Specifications

5,000 Ohms ± 2% at 25°C (77°F)
16,330 Ohms ± 2% at 0°C (32°F)

Check Procedure

NOTE: Use a multimeter to check operation.

1. Reboot machine by moving toggle switch off/on.
2. Inspect for correct wiring on the SRB Board.

•  Nozzle connection terminal J33
•  Cabinet connection terminal J32
•  Defrost connection terminal J34

3. Isolate by disconnecting the wiring connectors.
4. Check continuity across the terminals with an ohm

meter.

• Resistance = Thermistor is good.
• Open (OL) = Replace thermistor.

NOTE: These thermistors are identical. Swapping the

thermistor connections at the SRB board can be used for

diagnostics.

Temperature/Resistance Chart

This chart is used for the temperature control thermistors.

As the temperature rises at the thermistor block, the

resistance drops.
If the ohmmeter reads “OL”, check the scale setting on the

meter before assuming the thermistor is bad.

°C

°F

OHM

-17.8

43,297

-15.0

36,503

-12.2

30,884

-9.4

26,948

-6.7

22,928

-3.9

20,082

-1.1

17,188

1.7

14,751

4.4

13,019

7.2

11,506

10.0

9,951

Summary of Contents for FB081TF

Page 1: ...rvice Manual This manual is updated as new information and models are released Visit our website for the latest manual www welbilt com Part Number REV00 04 08 2020 FreshBlender Integrated Beverage Systems ...

Page 2: ...on about the procedure you are performing Read These Before Proceeding Caution Proper installation care and maintenance are essential for maximum performance and trouble free operation of your equipment Visit our website www welbilt com for manual updates translations or contact information for service agents in your area Importan Routine adjustments and maintenance procedures outlined in this man...

Page 3: ...a Personal Protective Equipment Hazard Assessment to ensure adequate protection during maintenance procedures nWarning When using electric appliances basic precautions must always be followed including the following a Read all the instructions before using the appliance b To reduce the risk of injury close supervision is necessary when an appliance is used near children c Do not contact moving par...

Page 4: ...THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 5: ...n Installation Start up Overview 15 Pre installation Checklist 15 Connections 16 Software 17 Start up Cleaning 17 Post Installation Checklist 18 Section 3 Operation External Component Identification 19 Sequence of Operation 19 Normal Operation 19 Product Dispense Operation 20 Operation 20 Ice Making 20 Refrigerated Cabinet Operation 22 Normal Operations 22 Evaporator Condenser Fan Motor Operation ...

Page 6: ...es 33 Control System 34 Ice System Troubleshooting 35 Installation Visual Inspection Checklist 35 Water System Checklist 36 REFRIGERATION SYSTEM CHECKLIST 36 Ice Production Quality Check 36 Discharge Pressure High Checklist 37 Discharge Pressure Low Checklist 37 Suction Pressure High Checklist 37 Suction Pressure Low Checklist 37 Blender Controls Flowchart 38 Blender Controls Flowchart Continued 3...

Page 7: ...ID 63 Settings 63 Logs 64 Subsystem Version Info 64 Section 7 Component Check Procedures Control System 65 ON OFF Rocker Switch 65 Power Relay 65 Fan Cycle Control 66 Ice Chute Switch 66 Blender Control Board 67 Beverage Components 68 Blender Step Motor 68 Blender Motor 68 Home Position Switch 69 Door Switches 69 Ice Chute Switch 70 Low water Float Switch 70 Low Pressure Control 71 High Pressure C...

Page 8: ...leanup Procedure 82 Replacing Pressure Controls 83 Section 8 Charts Total System Refrigerant Charge 85 24 Hour Ice Production Refrigerant Pressure Charts 85 FB081TF R404A Refrigerant Chart 86 FB081TP R290 Refrigerant Chart 86 Nominal Operating Voltage 87 Nominal Operating Voltage for Loaded Electrical Components 87 Nominal Operating Voltage for Sensors 87 Section 9 Diagrams Power Distribution Wiri...

Page 9: ...d online during the startup procedure the serial number can also be found in the Service Screen under Subsystem Versions after the machine has been properly registered and a Machine ID assigned Warranty Information Consult your local Service Agent or Representative for terms and conditions of your warranty Your warranty specifically excludes all general adjustments cleaning accessories and related...

Page 10: ... Additionally the equipment must be level side to side and front to back CAPACITY WEIGHT Drink Making Ice Capacity IceCompressor HP Max Product Bin Load Shipping Weight Empty Weight Full Operating Weight 1 drink in less than 2 minutes 30 per hour up to 2 consecutive peak hours Up to 250 lbs 113 kg 24 hr Bin Storage 30 lbs 14 kg 1 3 19 8 lbs 9 kg 520 lbs 236 kg Crated 400 lbs 181 kg Unpacked No Ice...

Page 11: ...ipment or in direct sunlight and must be protected from weather Plain Inlet Water Temperature min max 40 F 90 F 4 C 32 C Always use the water supply line supplied when installing this appliance Never reuse an old supply line Verify floor of install location is level front to back side to side Keep equipment area clear of combustible material Clearances Top 18 46 cm Sides 0 0 cm Back 6 15 cm Front ...

Page 12: ...must be grounded in accordance with national and local electrical codes This appliance must be grounded In the event of malfunction or breakdown grounding provides a path of least resistance for electric current to reduce the risk of electric shock This appliance is equipped with a cord having an equipment grounding conductor and a grounding plug The plug must be plugged into an appropriate outlet...

Page 13: ...BL 96 087 Rear of the Unit Use the supplied male quick connect PN WBL 96 087 and 6 1 8 m of 3 8 beverage tubing to the plain water inlet on the rear of the unit for the water supply connection NOTE The 6 1 8 m of tubing for the water line is for a service loop to allow the unit to be serviceable if pulled out of place Do not connect water to a hot water supply Be sure all hot water restrictors ins...

Page 14: ...mumwaterpressuresuppliedtothemachineneeds to be greater than the 35 psi 0 241 MPa 241 kPa 2 41 bar required during flowing conditions for pressure to be regulated properly REGULATOR SETTINGS LOCATION Models FB081TF NOTE The regulator is located behind the left side panel Plain Water Regulator 35 psi 0 241 MPa 241 kPa 2 41 bar Flowing Regulator Settings Importan Water requires the pressure measurem...

Page 15: ...ters are not bent Visually inspect the refrigeration package compressor compartment housing Be sure lines are secure and base is still intact Inspect installation location behind the unit for electrical outlet location water hose fittings and shutoff Check voltage at outlet dedicated for the Fresh Blends unit Verify floor of install location is level front to back side to side and all casters are ...

Page 16: ...ter inlet on the rear of the unit for the water supply connection Importan Water supply line needs to have an accessible water shutoff valve Importan Leave enough slack in the water and drain lines to allow access to the rear of the machine without disconnecting the lines Check regulator and set water pressure See System Pressures on page 14 Importan Regulators are factory set but will need to be ...

Page 17: ...tle positions been checked Has the Power switch on the top of the unit been turned to the ON position Is the correct UI Firmware and Menu loaded on the unit Are 8 products or sanitation caps in place in the lower refrigeration cabinet prior to Zone 2 cleaning Clean Sanitize 2 Perform Weekly Cleaning on the Fresh Blends machine by entering the one of the following screens Employee Manager or Servic...

Page 18: ...nstalled and primed Has the plain water regulators been correctly set during flowing conditions Is the machine cycling ON OFF on the temperature control Has the owner operator been instructed regarding maintenance procedures Has the owner operator completed the warranty registration card 4 Once completed the FreshBlender machine is ready for use ...

Page 19: ...on on page 20 With correct cup in place the drink preparation sequence commences when Start Drink Size is initiated through the touch screen The machine dispenses product and ice into the cup in the dispense area The cup is then placed into isolated the blend chamber by the automatic shuttle system The machine blends the drink for the correct time at the proper blender speed If add ins are require...

Page 20: ...t of the Unit Power Switch The ice machine will not start until 1 The power ON OFF switch is in the ON position 2 Ice does not contact the bin level sensor switch 3 The water reservoir is full of water 4 After 15 minute delay when power cycled 15 Minute time delay The 15 minute delay must be expired before the gear motor or compressor will energize The delay period starts to time out upon applicat...

Page 21: ... will remain off until the 15 minute delay period expires and the ice damper closes RESTART AFTER AUTOMATIC SHUT OFF 1 Lessthan4hourshavepassedsinceautomaticshut off With the water sensing switch closed reservoir full of water the gear motor will energize at the end of the 15 minute time delay The compressor and condenser fan motor energize 5 seconds after the gear motor 2 Morethan4hourshavepassed...

Page 22: ...compressor has run and then cycles off The compressor relay opens when the reach in temperature is less than the set point minus half the differential EVAPORATOR CONDENSER FAN MOTOR OPERATION The condenser fan motor and compressor share the same relay The evaporator fan motor relay is energized continuously and the evaporator fan runs continuously OPERATION IN THE CLEAN SANITIZE CYCLE During the w...

Page 23: ...tion of the gear motor is out of range for more than 5 seconds the rotation sensor will deactivate and stop the gear motor and compressor A 15 minute delay will begin and the SAFETY 1 LED and rotational LED will flash When the delay period ends the rotational LED and SAFETY 1 LED stop flashing and the ice machine begins a start up sequence After 8 consecutive attempts to restart the ice machine wi...

Page 24: ...24 Part Number REV00 04 08 2020 Operation Section 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 25: ...ker Bin Zone 3 Cleaning X Descale Ice Maker Bin Zone 3 Cleaning Clean Condenser Coil Inspect Ice Maker Dispenser Parts Check Ice Quality X X QUARTERLY BIANNUAL Maintenance 3 Months 6 Months Blender Dispense Area Cleaning Sanitizing Zone 1 Cleaning Product Line Cleaning Sanitizing Zone 2 Cleaning Drain Cleaning Clean Air Filters Clean Sanitize Ice Maker Bin Zone 3 Cleaning Descale Ice Maker Bin Zon...

Page 26: ...steps need to be taken First we need to understand the properties of stainless steel Stainless steel contains 70 80 iron which will rust It also contains 12 30 chromium which forms an invisible passive film over the steel s surface which acts as a shield against corrosion As long as the protective layer is intact the metal is still stainless If the film is broken or contaminated outside elements c...

Page 27: ... the doors and drawers will hamper the unit s ability to maintain operational temperature PREVENTING CORROSION Immediately wipe up all spills CLEANING KITS FreshblendsStera sheenstartercleaningkit partnumberWBL 40 001 FRU These kits include the following 2 5 gal Shaker Jug CIP Intake Line Two 4lb Jars of Stera sheen Cleaner Sanitizer Cups for blender cleaning 32 oz Spray Bottle Chlorine Test Strip...

Page 28: ... cleaning is accessed through the cleaning screen The Cleaning screen appears after selected from the Main Menu or when prompted to perform routine cleaning This screen s primary function is to perform routine cleaning and sanitation of the machine It covers the basic components of the FreshBlender that will need cleaned on a daily basis NOTE The on screen instructions can vary depending on the fi...

Page 29: ...ing sequence entirely will not reset the weekly cleaning timer and will require the process to be repeated Ice Maker Sanitizing Descaling Zone 3 4 Sanitizing is recommended every six 6 months More frequent sanitizing or descaling may be required in some existing water conditions Follow carefully any instructions provided with the bottles of Ice Machine Descaling or sanitizing solution nWarning Alw...

Page 30: ...ficient Two 2 6 O rings for the water and CIP hose quick connect lines Blender Shaft Assemblies The evaporator for the on board ice maker should be inspected at least once a year The evaporator service life also depends on the water quality and environment More frequent inspection and maintenance are recommended to keep performance of this ice maker optimized NOTE All planned maintenance must be d...

Page 31: ...main power supply Recipe does not dispense correctly No water supply or Low water pressure Restore water supply set regulator to correct pressure See Connections on page 16 Product is not installed is installed incorrectly Install product re install correctly Ice does not dispense Call for service Blender does not start or blend Door is not closed or shield isn t in place Close blender door replac...

Page 32: ...iced over Turn unit off and allow coil to defrost Make sure thermostat is not set too cold Also check door gasket condition System low on refrigerant Call for service Service company must locate and repair leak recover evacuate and recharge Compressor will not start hums and trips on overload protector Clean the condenser coil Move cabinet or make other adjustments to gain proper cabinet clearance...

Page 33: ...Part Number REV00 04 08 2020 33 Section 5 Troubleshooting Technician Level This troubleshooting is to be used only by qualified service technicians Error Log Messages ...

Page 34: ...functional component If blender is non functional proceed to Blender Motor section NOTE Both blender assemblies will require testing 13 24 VDC on Motor Controller Board MTA2 J1 No Replace wire Yes Go to next step 14 Home position switch closed on motor controller circuit board Home SWT J13 15 Door switch circuit closed on motor controller circuit board Door SWT J9 16 Door switch circuit closed and...

Page 35: ... sequence will begin ROTATION SHUTOFF During the ice making cycle if the rotation of the gear motor is out of range for more than 5 seconds the rotation sensor will deactivate and stop the gear motor and compressor A 15 minute delay will begin and the SAFETY 1 LED and rotational LED will flash When the delay period ends the rotational LED and SAFETY 1 LED stop flashing and the ice machine begins a...

Page 36: ... noise will normally be corrected with cleaning Infrequent cleaning may need an overnight soak with ice machine cleaner to remove all lime scale deposits ICE PRODUCTION QUALITY CHECK Ice Production 1 Empty the ice from the unit by starting Zone 3 cleaning which dumps ice for 4 minutes 2 Remove the ice bin lid remove the ice dispense drive shaft agitator 3 Run the ice machine a minimum of 10 minute...

Page 37: ...llation Refer to Installation Visual Inspection Checklist Discharge Pressure Discharge pressure is too high and is affecting suction pressure Improper Refrigerant Charge Overcharged also see Freeze Cycle Discharge Pressure High Checklist Wrong type of refrigerant Non condensible in system Components TXV flooding Defective compressor Other Non OEM components in system SUCTION PRESSURE LOW CHECKLIST...

Page 38: ...Mixer board Is between 60and250 VAC Checkhigh voltage betweenJ2ofLe Blender Mixer board and Pin7 oftheLe Safety DoorRelay Is between 60and250 VAC Y N Checkhigh voltage betweenJ2ofLe Blender Mixer board andPin4 oftheLe SafetyDoorRelay Is between 60and250 VAC ReplacetheLe Safety DoorRelay Replacetheharness betweenJ2 J7ofthe Le Blender Mixer boardandtheLe Checkhigh voltage betweenthepower inputtabsof...

Page 39: ...put betweenJ12Pin2 of Le Blender Mixer boardandPin9 ofthe Le SafetyDoorRelay Is between 22and26 VDC Checkvoltageoutput betweenJ12Pin2 of Le Blender Mixer boardandPin6 ofthe Le SafetyDoorRelay Replacetheharness betweenJ12oftheLe Blender Mixer board andtheLe Safety ReplacetheLe Safety DoorRelay Is between 22and26 VDC Is between 22and26 VDC Checkvoltageoutput betweenJ12Pin1 and J12Pin2 ofLe Blender M...

Page 40: ...ear motor Time delay light on evaporator is solid yellow after 11 seconds Red blinking is 15 minute time delay Red solid is lockout Clean ice machine and refer to time delay operation Compressor starts when the 11 second time delay ends Check contactor coil for power check contacts test gear motor Replace contactor or gear motor HPCO open Attach refrigeration gauge set and test run to check pressu...

Page 41: ...es No Yes Replace Motor Power To Fan Motor Repair Wiring Shaft Turns Replace Fan Blade No Yes No Yes Yes Temperature Set To 36º No Refer To Control Board Diagnostics Temperature Set Too High Reset Temperature Adjusting Temperature Starts Compressor Check Thermistor Mounting Refer To Thermistor Diagnostics Yes No No Yes Compressor Starts After 15 Minutes No Yes No Yes Verify Compressor Overload is ...

Page 42: ...ponents Function Condenser Fan Motor Functions Voltage Is Within 10 Of Nameplate Clean The Condenser Coil Restricted Clearances High Ambient Ice On Evaporator Coil Or Restricted Airflow Compressor Runs Continuous No Yes Yes Check Temperature Set Too Low Ice On Evaporator Coil Low On Refrigerant High Ambient Restricted Clearances Dirty Condenser Coil ...

Page 43: ... machine Begin 15 minute Power interrupt delay Pwr Interrupt Low Pressure SW open Low Water Float SW open Chute Safety SW open Stop Compressor and Gear motor Begin 15 min delay Stop Compressor and Gear motor Begin 15 min delay Stop Compressor and Gear motor Begin 15 min delay Monitor for the fault conditions during Ice making Start 3 minute timer for Min Run time Check Inputs no no no no no yes ye...

Page 44: ...OGIC ICE MACHINE START UP Full Bin Bin Level Open Ice Dispensed Count accumulated ice pucks since full bin Is puck count equal to or greater than 30 Is bin level switch closed BIC unit calling for ice Is bin level switch open Reset puck counter NO NO NO YES YES YES ...

Page 45: ...rator Fan Motors Evaporator Coil Verify door is closed and door gasket is in place If all above are within Spec s refer to Refrigeration diagnostics See Refrigeration System Diagnostics on page 47 Below temperature limit Compare temps on UI User Interface Check temperature set point Using the touch screen go to the Service or Managers Menu on the Main Screen A Touch Service Inputs Temperatures to ...

Page 46: ...for diagnostics See Temperature Thermistor Nozzle Cabinet probes only on page 77 Check compressor relay on SRB With power disconnected check the compressor relay that is mounted on the SRB The compressor relay is the largest relay on the SRB and has two terminals exposed that can be checked for continuity The exposed terminals are the Common C and the Normally Open NO If there is continuity betwee...

Page 47: ...pare the measurements step 3 with the published pressure temperature step 2 Measurements will fall within the published range on normally operating ice machines Discharge Pressure Temperature High Checklist Problem Cause Improper installation Refer to Installation procedures Restricted condenser air flow Dirty air filter High inlet air temperature Condenser discharge air recirculation Dirty conden...

Page 48: ...tion pressure temperature Refer to Discharge Pressure Temperature Low Checklist Improper refrigerant charge Undercharged Wrong type of refrigerant Other Non Manitowoc components in system Restricted plugged liquid line drier Restricted plugged tubing in suction side of refrigeration system Expansion valve starving No water or insufficient pressure Moisture in refrigeration system Dirty evaporator ...

Page 49: ...on is to select a drink to make or to access the Main Menu How to Access The Touch to Start screens display by default unless cleaning is required or drink selection is being made NOTE Touch the Touch to Start icon to proceed to drink choices Icon Button Descriptions Touch to Start Touching this icon begins the drink selection process NOTE Available drink selections may vary depending on the recip...

Page 50: ...en displays after touching the Touch to Start icon in the main screen PLeaSe SelEct a caTegOry of yoUr ChoIce Select a Category to continue to next screen Icon Button Descriptions Drink Categories The main product categories are displayed left to right on the Drink Selection screen Touching a category will display the drink flavor options available for the category NOTE Available drink selections ...

Page 51: ...lays after a drink selection has been made from the Drink Selection screen PLeaSe SelEct a caTegOry of yoUr ChoIce 2 99 2 99 2 99 2 99 2 99 2 99 Please select a flavor of your choice Select Flavor to continue to next screen Icon Button Descriptions Drink Flavor Buttons Flavor choices for the drink type that was selected NOTE Available flavor selections may vary depending on the recipe file install...

Page 52: ...ess The Flavor Selection screen displays after a drink selection has been made from the Drink Selection screen PLeaSe SelEct a caTegOry of yoUr ChoIce 2 99 2 99 2 99 2 99 2 99 2 99 Please select a flavor of your choice You ve selected a Please click here to confirm your selection STraWbeRry smOotHie Select Confirm Selection to continue to next screen The screen will display all selected drink info...

Page 53: ...lending Screens DIspEnsIng PLeaSe Wait 14 ANd Don t TakE yOur cuP yEt BLenDing PLeaSe Wait 14 ANd Don t TakE yOur cuP yEt IT s fiNisHed PLeaSe TakE yOur drInk anD hAve a niCe Day The dispensing screen displays as ice and product dispense into the cup An on screen percentage will display the amount until dispense is finished NOTE Once dispense is complete the cup will automatically move into the bl...

Page 54: ...n 5 The Size screen appears after a drink flavor has been confirmed from the Confirmation screen NOTE Make sure the correct cup is in place before pressing the drink size button 6 Select the size to start dispensing ice and product the screen will display DISPENSING DIspEnsIng PLeaSe Wait 14 ANd Don t TakE yOur cuP yEt 7 Once the drink has automatically moved into the blend chamber the blend scree...

Page 55: ... the user accessing them Only certain functions can be performed on the unit by an employee manager or service technician It takes a special touch sequence to access these screens and is password protected 1 2 3 Employee Menu Screen Items Leave the password field blank and touch the ENTER button to enter the Employee menu For managers type the Managers password then touch ENTER For service technic...

Page 56: ...screen visually displays levels for all flavors Underneath each flavor is the time remaining until the flavor expires in days NOZZLE and CABINET temperatures are also on the inventory screen When a flavor is touched on the screen the instructions to replace a product bag will begin See Procedure to Install a Product Bag on page 58 How to Access This is done through the Employee Managers or Service...

Page 57: ...ch sequence to access and is password protected Enter Password 1 This is done through the Employee Managers or Service Screen options Enter the Employee Managers or Service menu 2 Choose a slot and then choose a flavor product type that is loaded into the bin 3 Follow the on screen instructions and prime the product NOTE Inordertodispenseproductaproductbagmustbeloaded See ProceduretoInstallaProduc...

Page 58: ... instructions on the screen and scrolling to the flavor being loaded NOTE When performing a BAG REMOVAL the screen will instruct you on removal and you will then be taken back to the setup screen to load a new bag 4 After assigning a flavor or pressing BAG RELOAD the screen will instruct on how to load the bag in the lower refrigeration cabinet 5 Remove product bin from the cabinet discard existin...

Page 59: ...rature 32 F 0 C 34 F 1 C CheckZone2cleaningwascompletedover1hourago Check that Machine has been turned on for at least 1 hour Do not proceed with this check during peak time Dispense 2 large cups of ice Gather the following supplies Digital Scale Set to ounces Empty Clean Cups 1 Enter the Employee Managers or Service Screen options 2 Select the CALIBRATION button 3 Select what is going to be calib...

Page 60: ...04 08 2020 Controls Section 6 SHUTTLE CALIBRATION This is done through the Employee Managers or Service Screen options Enter the Employee Managers or Service menu 1 Select the CALIBRATION button 2 Select Shuttle Calibration ...

Page 61: ...imary function is to perform routine cleaning and sanitation of the machine How to Access This is done through the Employee Managers or Service Screen options Enter the Employee Managers or Service menu Importan Once the time limit has been exceeded the machine will no longer make a drink until cleaning has been completed See General Maintenance on page 25 for all daily and weekly cleaning instruc...

Page 62: ...eboot on its own to complete the update Once the screen comes back up and the drink making screen appears the new menu will be available Reloading or loading of new product may be necessary MANUAL LOCKOUT How to Access This is done through the Managers or Service Screen options only 1 Enter the Managers or Service menu 2 Select the MANUAL LOCKOUT button 3 Through this screens toggle you can lock t...

Page 63: ...ers or Service menu 2 Select the MANUAL LOCKOUT button 3 This screen gives access to all outputs on the unit NOTE This screen will allow the user to manually operate individual solenoids and other output functions on the machine Primary use of this screen is troubleshooting and diagnostics to be used by a service technician MACHINE ID How to Access This is done through the Managers or Service Scre...

Page 64: ...1 Enter the Managers or Service menu 2 Select the LOGS button SUBSYSTEM VERSION INFO How to Access This is done through the Managers or Service Screen options only This screen will display what software firmware versions are currently loaded on the machine 1 Enter the Managers or Service menu 2 Select the SUBSYSTEM VERSION INFO button ...

Page 65: ...FF rocker switch Specification Double Pole Single Throw DPST 220 VAC coil average coil resistance 21 KOhms Contact rating 30A 120 VAC When energized contacts close and allow power to flow to SRB board J9 J10 Power Supply CN1 and Evaporator Fans Check Procedure There is a small black manual push button on the relay body to allow testing of the contacts with the unit de energized Disconnect the wiri...

Page 66: ...remains off until enough ice is removed from the storage bin to allow the switch to close The ice machine will then restart provided the 15 minute delay has expired Specifications Normally closed 5 amps 125 250 VOLTS Symptoms Ice Chute Switch Fails Open The ice machine will not start an ice making cycle and the control board bin switch light remains on Bin Switch Fails Closed The ice machine conti...

Page 67: ... verify linear slide operation To test the motor blade it s best to place a cup of water in the blend chamber to be tested activate the blender slide on the side to be tested and then activate the blender blade This will allow for a better visual of the blade turning NOTE The blender blade will only operate for 3 seconds at half voltage in this test function The blender door must be fully closed t...

Page 68: ... Resistance Motor windings are good 3 Check rotor for excessive play or binding 4 Test home position switch 5 Test door switch es 6 Replace Blender Board BLENDER MOTOR Function Mixes ingredients to maintain a consistent product Specification 120V 60Hz or 220V 50Hz Check Procedure Use a voltmeter ohm meter to check motor operation 1 Disconnect the Blue and White wires from the Blender motors Blende...

Page 69: ... if continuity readings do not match both switch settings On Blender Board at J13 Terminal 1 Blue Terminal 2 Brown Open OL Replace motor Resistance 0 Motor is good DOOR SWITCHES Function Prevents blender motor operation if the door switch is not closed Location Magnetic switch is located on top of the Blend Chamber Linear Slide Bracket access from the back side The relay switch is located on each ...

Page 70: ...e chute switch if the light remains on replace the control board LOW WATER FLOAT SWITCH Function Stops the ice machine when the water level drops below an acceptable level Specifications The low water float switch is a magnetically operated reed switch The magnet is attached to the float When water contacts and raises the float the switch is electrically closed and the LOW LVL FLT LED will be off ...

Page 71: ...nterrupting the control signal to the control board Excessive high side pressure operates the HPCO The HPCO control is normally closed and opens on a rise in discharge pressure Location Above the ice compressor Specification Refrigerant Type Cut Out Cut In R404A 2413 kPa 24 13 bar 69 350 psig 10 1723 kPa 17 23 bar 69 250 psig 10 R290 The HPCO automatically resets when the pressure drops below the ...

Page 72: ...into an alarm condition The red sensor light is on and the ice machine stops until reset NOTE The SAFETY 2 LED on the control board is also energized Light Definition Yellow Blinking Time Delay Period Yellow Solid Normal Operation Red Blinking Fault Time Delay Period Red Solid Lockout 8 Consecutive Faults Remove Restore Power To Reset FAN CYCLE CONTROL Function Cycles the fan motor on and off to m...

Page 73: ... motor electrical cover inspect terminal block and check wire resistance B Disconnect and test capacitor C Jumper capacitor wires and retest gearmotor for resistance D Replace gear motor assembly 3 If the gear motor trips on overload immediately or intermittently A Premix 11 ounces of cleaner with 6 ounces of water in a non metallic container B Add the entire solution to the evaporator and allow t...

Page 74: ...t or will trip repeatedly on overload Check Resistance Ohm Values NOTE Compressor windings can have very low ohm values Use a properly calibrated meter Perform the resistance test after the compressor cools The compressor dome should be cool enough to touch below 120 F 49 C to assure that the overload is closed and the resistance readings will be accurate SINGLE PHASE COMPRESSORS 1 Disconnect powe...

Page 75: ...ntacts Replace the relay 3 Check the relay coil Measure the resistance between terminals 2 and 5 No resistance indicates an open coil Replace the relay COMPRESSOR ELECTRICAL DIAGNOSTICS Location On the base unit behind the rear panels Specification R 290 220 240 50 1 5HP TL4CN Check Procedure The compressor does not start or will trip repeatedly on overload CHECK RESISTANCE OHM VALUES Compressor w...

Page 76: ...sual evidence is present Use a capacitor tester when checking a suspect capacitor Clip the bleed resistor off the capacitor terminals before testing If the compressor hums and will not start but the windings are OK Replace the start capacitor A good test is to install a known good substitute capacitor FILTER DRIERS Location Ice maker Behind the compressor cabinet between compressor and condenser c...

Page 77: ...machine by moving toggle switch off on 2 Inspect for correct wiring on the SRB Board Nozzle connection terminal J33 Cabinet connection terminal J32 Defrost connection terminal J34 3 Isolate by disconnecting the wiring connectors 4 Check continuity across the terminals with an ohm meter Resistance Thermistor is good Open OL Replace thermistor NOTE These thermistors are identical Swapping the thermi...

Page 78: ...otor 3 Check the blade spins freely 4 Check rotor for excessive play or binding 5 Remove the wiring from the terminal connectors and check continuity across the terminals with an ohm meter Resistance Motor windings are good Open OL Replace motor Refrigerant Recovery Evacuation SELF CONTAINED MODEL PROCEDURE Do not purge refrigerant to the atmosphere Capture refrigerant using recovery equipment Fol...

Page 79: ... side on manifold gauges RECOVERY EVACUATION CONNECTIONS 3 Perform recovery or evacuation A Recovery Operate the recovery unit as directed by the manufacturer s instructions B Evacuation prior to recharging Pull the system down to 500 microns Then allow the pump to run for an additional half hour Turn off the pump and perform a standing vacuum leak check 4 Follow the Charging Procedures See Self C...

Page 80: ...minutes 6 Close the high side on the manifold gauge set 7 Press the power button 8 Add any remaining refrigerant through the suction service valve if necessary NOTE Manifold gauges must be removed properly to ensure that no refrigerant contamination or loss occurs 9 Make sure that all of the vapor in the charging hoses is drawn into the ice machine before disconnecting the charging hoses A Run the...

Page 81: ...ls of contamination or if a test kit is not available inspect the compressor oil 1 Remove the refrigerant charge from the ice machine 2 Remove the compressor from the system 3 Check the odor and appearance of the oil 4 Inspect open suction and discharge lines at the compressor for burnout deposits 5 If no signs of contamination are present perform an acid oil test Check the chart to determine the ...

Page 82: ...tall a new compressor and new start components 6 Install a suction line filter drier with acid and moisture removal capability Place the filter drier as close to the compressor as possible 7 Install an access valve at the inlet of the suction line drier 8 Install a new liquid line drier 9 Follow the normal evacuation procedure except replace the evacuation step with the following A Pull vacuum to ...

Page 83: ...nch off tool Position the pinch off tool around the tubing as far from the pressure control as feasible Clamp down on the tubing until the pinch off is complete nWarning Do not unsolder a defective component Cut it out of the system Do not remove the pinch off tool until the new component is securely in place 3 Cut the tubing of the defective component with a small tubing cutter 4 Solder the repla...

Page 84: ...84 Part Number REV00 04 08 2020 Component Check Procedures Section 7 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 85: ... Ice Maker FB081TP 1 Lower Cabinet R290 3 53 oz 100 g 2 Ice Maker 24 Hour Ice Production Refrigerant Pressure Charts These charts are used as guidelines to verify correct ice machine operation Accurate collection of data is essential to obtain the correct diagnosis Ice production checks that are within 10 of the chart are considered normal This is due to variances in water and air temperature Actu...

Page 86: ...04A Air Temperature Around the Unit F C Discharge Pressure PSI kPa Suction Pressure PSI kPa 70 21 210 230 1448 1586 28 33 193 228 90 32 290 310 1999 2137 32 37 221 255 110 43 355 375 2448 2586 36 41 248 283 FB081TP R290 REFRIGERANT CHART Characteristics vary depending on operating conditions 24 hour production Air Temperature Water Temperature F C 24 hour Production 70 21 50 10 591 lbs 268 kgs 90 ...

Page 87: ...xer Blender Board Assembly X X X SRB Assembly Control Board to All Components X X X X X NOTE Voltage into Load Component except as noted High Voltage AC Refer to Nameplate Rating Low Voltage AC Less than 10V AC Other Refer to Tech Manual for details NOMINAL OPERATING VOLTAGE FOR SENSORS Component High Voltage AC 24V DC Voltage Low Voltage AC Modbus Other Temperature Drive Defrost Nozzle Cabinet X ...

Page 88: ...88 Part Number REV00 04 08 2020 Charts Section 8 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 89: ...LAY ICE EVAP GEAR MTR RELAY MAIN PWR RELAY AC LINE FILTER MOTOR DRIVER BOARD DC DC MAIN PWR SW AC L AC N USB Ext ICE MKR COMP ICE MKR COND FAN BASE CAB COMP BASE CAB COND FAN ICE EVAP GEAR MOTOR EXT CAP 0 1uF 275V FILTER SNUBBER ASSY BLENDER ASSY CAP ICE DISP MOTOR DIODE 5A REED SWITCHES DOOR POS 2 BLEND POS 2 DISPENSE POS 2 SMART RELAY BOARD MIXER BOARD AUX BOARD J6 J35 J12 J11 J26 J25 J14 J13 J1...

Page 90: ...ypad ICE COMP RELAY ICE EVAP GEAR MTR RELAY MAIN PWR RELAY AC LINE FILTER MOTOR DRIVER BOARD DC DC MAIN PWR SW AC L AC N USB Ext ICE MKR COMP ICE MKR COND FAN BASE CAB COMP BASE CAB COND FAN ICE EVAP GEAR MOTOR EXT CAP 0 1uF 275V FILTER SNUBBER ASSY BLENDER ASSY CAP ICE DISP MOTOR DIODE 5A REED SWITCHES DOOR POS 2 BLEND POS 2 DISPENSE POS 2 SMART RELAY BOARD MIXER BOARD AUX BOARD J6 J35 J12 J11 J2...

Page 91: ... Area Top Right Top Left Bottom Bottom Hydraulic Diagram FRESH BLEND Revision 7 J Hurtado 5 17 2018 0 17 ID LLDPE 12 0 17 ID LLDPE 12 Spray Head Spray Head 2 S2 Spray Head Spray Head DRAIN S7 S3 S4 S5 Spray Head Spray Head Water Flow Cleaner Flow 7 8 Filter Sanitizer Cleaner Cleaning hose 1 Water pressure regulator NEFF Engineering PN NE REG H20 NSF QTY 1 2 7 valve solenoid manifold MAC Valves SMA...

Page 92: ... Part Number REV00 04 08 2020 Diagrams Section 9 ICE MACHINE REFRIGERATION TUBING SCHEMATIC 5 1 2 3 4 6 1 Compressor 2 Condenser 3 Liquid Line Filter Drier 4 Heat Exchanger 5 Expansion Valve 6 Evaporator ...

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Page 96: ...y necessitate change of specifications without notice Part Number REV00 04 08 2020 Every new piece of Welbilt equipment comes with KitchenCare and you choose the level of service that meets your operational needs from one restaurant to multiple locations StarCare Warranty lifetime service certified OEM parts global parts inventory performance audited ExtraCare CareCode 24 7 Support online mobile p...

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Welbilt FB081TF, Service Manual

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