Bunn AFPO-2, Service And Repair Manual

Page 1: ...UT FLAVOR OUTPUT WATER OUTPUT WATER OUTPUT FL AV OR IN PU T 1 2 WATER IN PUT FLAVOR OUTPUT FLAVOR OUTPUT WATER OUTPUT WATER OUTPUT REFILL MAIN POW ER 2 1 1 2 SERVICE REPAIR MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 41093 0000A 04 08 2008 Bunn O Matic Corporation ...

Page 2: ...cordingly statements by such individuals whether oral or written do not constitute warranties and should not be relied upon If BUNN determines in its sole discretion that the equipment does not conform to the warranty BUNN at its exclusive option while the equipment is under warranty shall either 1 provide at no charge replacement parts and or labor during the applicable parts and labor warranty p...

Page 3: ...Maintenance Cleaning 4 Adjustments 4 Operating Controls 6 Troubleshooting 7 Service 9 Circuit Board 10 Fuse Fuse Holder 11 Main ON OFF Switch 12 Probe LOW OFF HIGH Switches 13 Pump Flavor Start Switches 14 Refill ON OFF Switches 15 Solenoid 16 Solenoid Water Start Switches 17 Test Operate Switch 18 Vacuum Supply Pump Assembly 19 Vacuum Switches 21 Piping Diagram 22 Wiring Diagrams 23 41093 040408 ...

Page 4: ...cleaning solution pumped through the system 6 Empty the hoppers of your machine and follow the recommended cleaning instructions NOTE The hoses should be checked monthly for deterioration cracks and possible discoloration from some concentrates Replace the tubing when necessary MIX RATIO ADJUSTMENTS 1 Remove the top access panel 2 Connect the test hose to the WATER OUTPUT to be adjusted 3 Connect ...

Page 5: ...h a one cup container under the test hose press the corresponding TEST OUTPUT switch and carefully measure and note the elapsed time from when the product first flows from the test hose to when one half cup of the product has been dispensed This value may then be used in the formula below Following flavor pump output measurement disconnect the flavor line from the FLAVOR INPUT and purge remaining ...

Page 6: ...PERATE switch is located inside the auto fill box just below the top access cover For setting flow rates and mix ratios for flavors place the TEST OPER ATE switch in the TEST position This allows the op erator to run the water and flavor lines for each circuit depending on the requirements for the flavor recipe D PROBE CONTROL BOX LOW OFF HIGH On models equipped with a dual level probe there is a ...

Page 7: ...use of two wrenches is recommended whenever plumbing fittings are tightened or loosened This will help to avoid twists and kinks in the tubing Make certain that all plumbing connections are sealed and electrical connections tight and isolated Keep away from combustibles WARNING Exercise extreme caution when servicing electrical equipment Unplug the dispenser when servicing except when electrical t...

Page 8: ... Supply pump for testing procedures See page 20 Refer to Service Pump flavor start switches for test procedures See page 15 Water lines and valves to the dis penser must be open Refer to Setup Mix Ratio Adjust ments for adjustment See page 5 Refer to Service Solenoids for test procedures See page 17 The thermal switch will reset but requires up to 30 minutes of cooling time See NOTE below NOTE Thi...

Page 9: ...uld be performed only by qualified servicepersonnel Thedispensershouldbeunplugged when servicing except when electrical tests are re quired and the test procedure specifically states to plug in the dispenser COMPONENT ACCESS WARNING Disconnectthedispenser fromthepower source before the removal of any panel or the replace ment of any component All components are accessible by removing the eight 8 3...

Page 10: ...er source If voltage is present as described replace the circuit board If voltage is not present as described refer to the Wiring Diagrams and check main wiring harness Removal and Replacement 1 Remove the four 8 32 keps nuts securing the switch mounting bracket Set aside with the wires attached 2 Remove the circuit board shield and set aside for reassembly 3 Disconnect the ten pin plug from the m...

Page 11: ...resent replace the fuse FIG 4 FUSE HOLDER P1516 FUSE AND FUSE HOLDER Removal and Replacement Fuse 1 Remove the cap from the fuse holder 2 Remove fuse from the fuse holder and inspect If blown discard 3 Install new 10 amp fuse in the fuse holder 4 Reinstall fuse holder cap Fuse Holder 1 Disconnect the dispenser from the power source 2 Disconnect the wires from the rear of the fuse holder 3 Remove t...

Page 12: ...20 volts ac for 2 wire 120 volt models b 200 to 240 volts ac for two wire 200 or 240 volt models c 230 volts ac for two wire 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 Ifvoltageisnotpresentasdescribed refertotheWiring Diagrams and check the dispenser wiring harness SERVICE cont 5 Check for continuity across the switch terminals ...

Page 13: ...switch in the autofill box 5 Refer to Fig 11 when reconnecting the wires FIG 8 PROBE SWITCHES SERVICE cont Location The probe switches are located on the rear of each hopper mounted in the probe housing cover Test Procedure Probe System 1 Disconnect the dispenser from the power source 2 Withtheprobeboxesconnectedtothesignalcable remove connector from refill box 3 Place the switch on the probe box ...

Page 14: ...e the switch FIG 12 PUMP FLAVOR START SWITCHES FIG 13 PUMP FLAVOR SWITCH TERMINALS P1521 P1524 BLK from Solenoid Switch 1 BLK to Test Operate Switch RED BLK to Test Operate Switch YEL to Pump 1 BLK from Solenoid Switch 1 BLK to Solenoid Switch 2 BRN BLK to Test Operate Switch ORN to Pump 2 1 AFPO 2 3 2 AFPO 2 3 BLK from Solenoid Switch 2 BLK to Solenoid Switch 3 WHI RED to Test Operate Switch RED ...

Page 15: ...tpresentasdescribed refertotheWiring Diagrams and check dispenser wiring harness 5 Check for continuity across the switch terminals with the switch in the ON position Continuity must not be present when the switch is in the OFF position P1516 FIG 15 REFILL SWITCH TERMINALS P1522 If continuity is present as described reconnect the wires to the switch terminals If continuity is not present as descri...

Page 16: ...ower source Press the solenoid water switch and listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 7 Disconnect the dispenser from the power source If the sound is heard as described and water will not pass through the solenoid valve there may be a block age in the water inlet before the solenoid valve or the solenoid valve may require inspectio...

Page 17: ...refer to Fig 19 and reconnect the wires to the switch If continuity is not present as described replace the switch FIG 19 SOLENOID WATER SWITCH TERMINALS P1524 BLK from Pump Switch 2 BLK to Pump Switch 1 BLU to Test Operate Switch BLU to to Solenoid 1 BLK from Main ON OFF Switch BLK to Pump Switch 2 VIO to Test Operate Switch VIO to Solenoid 2 1 AFPO 2 3 2 AFPO 2 3 BLK from Pump Switch 3 WHI VIO t...

Page 18: ...ity across the left and center terminals in rows one two three and four with the switch in the operate position Continuity should not be present across the left and center terminals with the switch in the center or Test position If continuity is present as described replace the wires The switch is operating properly If continuity is not present as described replace the switch Removal and Replaceme...

Page 19: ...eWiring Diagrams and check main wiring harness Pump Motor Removal and Replacement NOTE Do not disconnect or damage tubing Tubing is not replaced when pump is replaced 1 Disconnect the pump motor leads 2 Remove the four thumb screws securing the pump head to the pump body 3 Removethetwo 8 32kepsnutssecuringthepump motor bracket assembly to the refill unit 4 Remove the two 6 32 screws securing the p...

Page 20: ...g around the rollers as shown in Fig 24 5 Insert the slot of the tubing key supplied as shown in Fig 24 on the rotor so the bottom edge of the key is pressing the tubing into the pump head cavity as shown in Fig 25 6 Hold the tubing and rotor in the pump head and remove key carefully 7 Squeeze the pump body and pump heads together simultaneously until pump body and pump head are touching on all si...

Page 21: ...om the power source 2 Removal of the two 8 32 keps nuts securing the pump motor assembly nearest the vacuum switches is required to access the lower vacuum switch 3 Disconnecttheinputtubesfromthevacuumswitch to be replaced 4 Disconnect the wires on the vacuum switch to be removed 5 Removethetwo 4 40screwssecuringthevacuum switchtothesolenoidbracket Removeanddiscard switch 6 Using two 4 40 screws s...

Page 22: ...tween the AFPO 2 3 and AFPO 2 3 SL is the SL models have a water output line and a flavor output line for each product This allows the water and flavor to be mixed in the hoppers Refer to the illustration below when connecting the lines 41093 040408 ...

Page 23: ... W I T C H BRN BLK BRN BLK BRN BLK VIO VIO BLK ORN BLU BLU YEL RED BLK RED BLK RED BLK RED BLK BLK ORN VACUUM SWITCH 2 VACUUM SWITCH 1 BRN BLK WHI WHI WHI WHI W H I W H I VIO YEL SCHEMATIC WIRING DIAGRAM AFPO 2 1 4 2 3 1 4 2 3 GRN RED BLK BLK 1 2 1 2 1 2 1 2 L H L H PROBE CONTROL 1 PROBE CONTROL 2 120 VOLT AC 2 WIRE SINGLE PHASE 28814 0000D 6 98 1998 BUNN O MATIC CORPORATION SOLENOID SWITCH 2 SW1A...

Page 24: ...24 41093 040408 ...

Page 25: ...W I T C H BRN BLK BRN BLK BRN BLK VIO VIO BLK ORN BLU BLU YEL RED BLK RED BLK RED BLK RED BLK BLK ORN VACUUM SWITCH 2 VACUUM SWITCH 1 BRN BLK WHI WHI WHI WHI W H I W H I VIO YEL SCHEMATIC WIRING DIAGRAM AFPOA 2 1 4 2 3 1 4 2 3 GRN RED BLK BLK 1 2 1 2 1 2 1 2 L H L H PROBE CONTROL 1 PROBE CONTROL 2 230 VOLT AC 2 WIRE SINGLE PHASE 28814 0004A 11 99 1999 BUNN O MATIC CORPORATION SOLENOID SWITCH 2 SW1...