Cornelius R-404A REFRIGERANT service manual Master and Relay Circuit Board

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DIP SWITCH

ASS’Y

10

9

8

7

6

5

4

3

2

1

SERVICE USE ONLY

APPLICABLE ELECTRIC OR GAS DEFROST (See Table 5)

} NOT USED

MOTOR CURRENT SELF-CALIBRATION (See Table 5) BEATER MOTORS CURRENT READOUT (See Table 5)

}POINT OF SALE MESSAGE DISPLAY SELECT

(See Table 7)

Note: Switch No. 3 must be in “OFF” position for standard Units with pulse expan- sion valves. Switch No. 3 must be in “ON” position for Units with mechanical expansion valves.

MOTOR CURRENT

ADJUSTMENT

RELAY CIRCUIT

BOARD NO. 2

MASTER CIRCUIT

BOARD

RELAY CIRCUIT

BOARD NO. 1

NO. 2 EVAPORATOR REFRIGERATION

COIL INLET TEMPERATURE

NO. 1 EVAPORATOR REFRIGERATION

COIL INLET TEMPERATURE

NO. 1 AND NO. 2 EVAPORATOR COILS

REFRIGERATION COMMON OUTLET TEMPERATURES

FIGURE 4. MASTER AND RELAY CIRCUIT BOARD

21

312028000

Image 28

Contents To the Installer Table of Contents Table of Contents cont’d Programming Main Menu Selections Onto Message Display VIS Read Actual Viscosity Readout of ProductWater Strainer Screen and Double Liquid Check Valve Preparing Unit for SHIPPING, STORING, or RelocatingProduct Carbonation Adjustment Daily Cleaning of Unit Sanitizing Syrup SystemsTroubleshooting Control Panel Switches and Fault ‘‘ERROR 1’’ or ‘‘ERROR 2’’ Fault Message Goes on DuringFreeze Cylinder Automatic Defrost Cycle does not Defrost Cycle does not Cancel After Pressing ‘‘CANCELList of Figures Table of Contents cont’d General Description Unit DescriptionAccessories Service ToolsTheory of Operation Generic Flavor TabsManual Defrost System Defrost SystemsAutomatic Defrost System ‘‘SLEEP’’ Sleep Time ‘‘WAKE UP’’ Wake UP TimeFlow Diagram This page Left Blank Intentionally Unpacking and Inspection Identification of LOOSE-SHIPPED PartsSelecting Location Electrical Power RequirementsHZ Unit Installing Unit Installing Leveling LegsInstalling Drip Tray Supports Item 7 and Item Installing Drip Tray Drain Hose KIT ItemInstalling Primary CO2 Regulator Assembly on CO2 Cylinder Connecting CO2 Source Line to Unit CO2 Inlet LineConnecting Electrical Power Circuit to the Unit Connecting City Plain Water Source Line to UnitElectrical BOX Turning on Electrical Power to Unit Adjusting Primary CO2 RegulatorAdjusting Product Blender Tanks Secondary CO2 Adjusting Carbonator Secondary CO2 RegulatorHidden Security Switch Message Display Control Panel ASS’YFilling Freeze Cylinders with Product Checking Unit for SYRUP, CO2, or Plain Water LeaksAdjusting Beater Motor Current Either Side Placing Unit in Operating LocationSetting Clock Time of DAY Programming Main Menu Selection Onto Message DisplayMenu Selections Programming ‘‘DEFROST’’ Automatic Settings Into UnitMain Menu Selections DIP Switch Functions Switch FunctionProgramming ‘‘SLEEP’’ Sleep Time Into Unit Programming ‘‘WAKE UP’’ Wake UP Time Into Unit Programming Point of Sale Message DisplayAdjusting VIS SET Product Viscosity of Dispensed Product Master and Relay Circuit Board ‘‘VOLTAGE’’ Displayed Voltage Readout 312028000 Totals Menu Commands Description Syrup Minutes SideBrix Gallons = a X Syrup MinutesDisplayed Error Conditions Programming Proper Refrigerant Type Into Unit ElectronicsDisplayed Error Conditions Control Panel ASS’Y Switches and Displayed Messages Control Panel ASS’Y SwitchesControl Panel Assembly Display Messages ‘‘SECURITY SWITCH.’’Freeze Cylinders Manual or Automatic Defrost Systems ‘‘SLEEP’’ Sleep Time Operation Faceplate Relief ValvesProduct Sample Valves Product Shutoff ValvesSyrup Flow Regulators Dispensing ValvesDispensed Product Conditions ‘‘OVERRUN’’, AS Applied to Frozen Carbonated BeveragesOperating Unit Operating CharacteristicsReplenishing Syrup Supply Cleaning and Sanitizing Cleaning Condenser CoilProduct Flavor Change Checking CO2 SupplyAdjustments Adjusting ‘‘VIS SET’’ Product Viscosity of Dispensed Product Cleaning CO2 GAS Check Valves Preparing Unit for SHIPPING, STORING, or Relocating Periodic InspectionTOP Panel Back PanelOpening and Closing Front Access Door Front Access PanelOpening Front Access Door Closing Front Access DoorOperating Controls Unit Internal Components SELF-CLOSING Dispensing Valve 312028000 Adjusting Plain Water Pressure Regulator Adjusting Carbonated Water Flow RateFreeze Cylinder Cutaway View Servicing Beater Motor Drive SHAFT/SEAL Assembly Beaters and Scraper Blades Installation Adjusting CO2 Regulators Adjusting Brix WATER-TO-SYRUP ‘‘RATIO’’ of Dispensed Product Daily Cleaning of Unit Product Carbonation AdjustmentSanitizing Syrup Systems To disconnect soft drink tank from Unit syrup system 312028000 Yearly or After Water System Disruption Servicing Carbonator Water Pump Water Strainer ScreenLiquid Check Valve Assembly Servicing Carbonator Water Pump Double Liquid Check ValveReplenishing Syrup Supply Replenishing CO2 Supply Service and Maintenance SectionSyrup Flavor Change Water Strainer Screen and Double Liquid Check Valve Serviced Replacing Freeze Cylinder Beater Drive MotorAdjusting Carbonator Tank Liquid Level Ments in Small IncrementsCarbonator Liquid Level Control Switch Adjustment Refrigeration Flow Diagram Wiring Diagram This page Left Blank Intentionally Troubleshooting Control Panel Switches and Fault Messages Control Panel Switches Poorly Illuminated Display ONE or More FaultALL Fault Messages not a Cannot be DeactivatedALL Fault Message not ‘‘CO2 OUT’’ Fault Message‘‘H2O OUT’’ Fault Message Fault Message Goes onTroubleshooting Product Blender Tanks and Carbonator Troubleshooting Dispensed Product Frozen Product Consistency VariesExcessively FREEZE-UPIllustrated Parts Breakdown Unit Part NumbersOvercounter FCB POST-MIX Dispenser FCB POST-MIX Dispenser FCB POST-MIX Dispenser cont’d Name Secondary CO2 Regulator Components Secondary CO2 Regulator ASS’Y CO2 Regulator Assembly Blender and Tubing Components Tubing Assembly Carb Water Tubing Assembly Water Solenoid to Blender Solenoid Valve Assembly Blender Components Control BOX and Display Panel Components Faceplate Assembly Dispensing Valve Assembly Carbonator Components Carbonator Tank and Linkage Assembly Pump and Motor ASS’Y Beater Motor Drive SHAFT/SEAL ASS’Y Warranty This page Left Blank Intentionally One Cornelius Place Anoka, Minnesota 612 800