Manuals / Bunn / Kitchen Appliance / Beverage Dispenser

Bunn manual MEMBRANE SWITCH ULTRA-2, SERVICE cont

Models: ULTRA-2

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Page 54

MEMBRANE SWITCH (ULTRA-2)

SERVICE (cont.)

MEMBRANE SWITCH (ULTRA-2)

FIG. 53 MEMBRANE SWITCH

Location:

The membrane switch is located on the front panel.

Test Procedures:

NOTE: Before continuing, check that the ribbon cable is properly connected to the control board and not a pin off in either direction.

1.Disconnect the dispenser from the power source.

2.Remove the right and left side panels.

3.Remove the front panel and disconnect ribbon cable.

4.Check for continuity of the switches using pin #7 as common.

#7 - #1 (shield) no continuity #7 - #2 (Left Auger)

#7 - #3 (I/O)

#7 - #4 (not used)

#7 - #5 (Left ICE/CHILL/OFF) #7 - #6 (ULTRA)

#7 - #8 (GOURMET) #7 - #9 (not used) #7 - #10 (ICE)

#7 - #11 (Right Auger)

#7 - #12 (Right ICE/CHILL/OFF)

If continuity is not present when the appropriate switch is pressed, the Membrane Switch must be replaced. If continuity is present, chech the short harness going to J2 on the Control Board.

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Removal and Replacement:

1.Disconnect the dispenser from the power source.

2.Remove right and left side panels.

3.Remove front panel and disconnect ribbon cable.

4.Peel the old Membrane Swith off the front panel and discard. Clean any remaining adhesive from front panel with mineral spirits and then alcohol.

5.Remove protective paper backing from back side of new Membrane Switch.

6.Guide ribbon cable through narrow slot in panel. Carefully position new Membrane Switch on panel, while centering display window to opening.

7.Refer to Fig. 54 and connect the ribbon cable to the chort harness from the Control Board.

NOTE: The black wire should correspond to the #1 printed on the clear portion of the cable.

		GOURMET	MEMBRANE
I/O	ULTRA		SWITCH
			ICE	12
			ICE
				1
			SHIELD
	LEFT		RIGHT
	FIG. 54 MEMBRANE SWITCH

1

FIG. 55 MEMBRANE SWITCH

and RIBBON CABLE

41084 102709

Image 54

Bunn manual MEMBRANE SWITCH ULTRA-2, SERVICE cont

Contents

BUNN-O-MATICCORPORATION SERVICE & REPAIR MANUALULTRA-1 ULTRA-2 41084.0000D 03/13 2009 Bunn-O-MaticCorporationBUNN-O-MATICCOMMERCIAL PRODUCT WARRANTY Service CONTENTSPreventive Maintenance USER NOTICESFault codes Safety firstBasic Maintenance INTRODUCTIONTEMP & TORQUE SCREEN DISPLAY TEMP & TORQUE161h OPERATING CONTROLS ULTRA-1 OPERATING CONTROLS ULTRA-2 RECOMMENDED DAILY CLEANING ULTRA-2shown RECOMMENDED DAILY CLEANING Continued Sanitizing Procedure Auto-fillCleaning InstructionsWith Brixing Pump Installed Materials requiredPREVENTIVE MAINTENANCE NORMAL OPERATIONPOSSIBLE CAUSES FOR FALSE READINGS INSTRUCTIONS REQUIRED REGULAR MAINTENANCE Semi AnnualKit Contents DescriptionREQUIRED REGULAR MAINTENANCE Continued TROUBLESHOOTING No PowerTROUBLESHOOTING cont Chills but won’t freeze TROUBLESHOOTING cont No cooling at all TROUBLESHOOTING cont Freezes, but not thick enoughTROUBLESHOOTING cont Noise Auger won’t turnTROUBLESHOOTING cont TORQUE SENSOR ERROR Torque Sensor Error TORQUE SENSOR SHORTEDTORQUE SENSOR OPEN TEMPERATURE SENSOR OPEN TROUBLESHOOTING cont Temperature Sensor ErrorTEMPERATURE SENSOR SHORTED Thermistor unplugged or break in wiringTROUBLESHOOTING cont Clean Filter Messages “FILTER NEEDS CLEANING”“FILTER NEEDS CLEANING!!!” SERVICE COMPONENT ACCESS PANELSMOTOR COIL RESISTANCE SERVICEcont AUGER MOTORSFIG. 1 AUGER MOTORS FIG. 2 AUGER MOTOR TERMINALSSERVICE cont AUGER MOTOR CAPACITOR FIG. 4 AUGER MOTOR CAPACITOR TERMINALSSERVICE cont AUGER SHAFT ASSEMBLY SERVICE cont AUGER SHAFT ASSEMBLYcont SERVICE cont CIRCUIT BREAKER 120V COMPRESSORS SERVICE contLocation 230V COMPRESSORS230V DISPENSERS SERVICE cont120V DISPENSERS FIG. 16 COMPRESSOR START RELAY TERMINALSSERVICE cont Removal and Replacement Compressor AssyCOMPRESSOR AMERICOLD ULTRA-2cont SERVICE cont COMPRESSOR EMBRACO ULTRA-2 FIG. 22 THERMAL OVERLOAD PROTECTOR TERMINALS SERVICE cont COMPRESSOR EMBRACO ULTRA-2contModel T-2155 Model T-2168SERVICE cont COMPRESSOR EMBRACO ULTRA-2cont Compressor Model Compressor SpecificationCSR Motor Wiring Diagram Capacitor RatingsImportant Safeguards Compressor Wiring DiagramSERVICE cont COMPRESSOR EMBRACO ULTRA-2 SERVICE cont COMPRESSOR EMBRACO ULTRA-2 Check Compressor Windings for Ground FaultStart Capacitor External Thermal ProtectorPotential Start Relay Mounting Position Run Capacitior2.Compressor Run Capacitor SERVICE cont COMPRESSOR APPLIANCES ULTRA-11.Compressor Start Relay 3.Thermal Overload ProtectorFIG. 28 COMPRESSOR CAPACITOR TERMINALS SERVICE contFIG. 26 RELAY TERMINALS COMPRESSOR APPLIANCES ULTRA-1contSERVICE cont COMPRESSOR APPLIANCES ULTRA-1contCompressor Assy SERVICE cont COMPRESSOR DANFOSS ULTRA-1Bcont SERVICE cont COMPRESSOR DANFOSS ULTRA-1Bcont FIG. 30 RELAY TERMINALSSERVICE cont RELAY or CONTACTOR on Early Models SERVICE cont CONTROL BOARD TIC boardSERVICE cont COOLING DRUM ALIGNMENT SERVICE cont FAN - ULTRA-2 FAN - ULTRA-1 SERVICE contSERVICE cont HOT GAS TEMPERATURE SENSOR SERVICE cont LAMP CORD ASSY FIG. 45 LAMP CORD ASSYSERVICE cont LAMP CORD CONNECTOR SERVICE cont LAMP HOLDER/SOCKET ASSEMBLY SERVICE cont LED Lamps SERVICE cont LAMP RELAY MEMBRANE SWITCH ULTRA-2 SERVICE contMEMBRANE SWITCH ULTRA-1 SERVICE contSOLENOIDS FIG. 59 SOLENOIDSSERVICE cont SERVICE cont TEMPERATURE SENSOR SERVICE cont TORQUE SENSOR CIRCUIT BOARD DO NOT TURN ON AUGERSTRANSFORMER SERVICE contCOOLANT SCHEMATIC ULTRA-1 COOLANT SCHEMATIC ULTRA-2 TRIAC MAP for ULTRA-1 ULTRA-1TRIACSTRIAC MAPS for ULTRA-2 LIQUID AUTO-FILLBOARDULTRA-2TRIACS Input and Output Chart ULTRA-1 Configuration for CF VALVE Models SCHEMATIC WIRING DIAGRAM ULTRA-1120 VOLTS AC or 230 VOLTS AC 2WIRE SINGLE PHASE 50/60 HZInput and Output Chart ULTRA-2 230 VOLTS AC SCHEMATIC WIRING DIAGRAM ULTRA-2AF120 VOLTS AC 4108441084