service, repair, AXIOM Series Service & Repair Manual
Contents
1. 1441 THOH 1431 Fa ni HO HO E H B E i E 2 2 z oL 2 6 1 TH SSY T3Nvd 7 JOMINOO 1431 J creg Ne AAAA A f we J _ TEH n N 046 M O n 2 f dol 1331 18 NIV 934 SMH3NWHVM x 401 1HOhl N N ASSY HNvd S j 19 19 2 N 21 LI E ong 7 9 5 AA H oO ea E 217 i H Hd Hm EH sS A A GIONTT1OS M3ASVM 133NY I8 3SN3dSId HOM diON310S ABS THE 711434 1915 1331 31 3 ANYL 1431 L3XNYIH 29 AVLSOWYSHL 13312. dION3IOS TIS 1431 V IN 3 2 5 A 7 mm 2 P G EE lo 2 HOLMS 330 NO f A 5 3 1 NV z lt Va f N 5 x 9 E 2 a 2 7 J REI HH 0 THM pun LINE 106 3sN3dsld LHE NIV 1vISOWHSHL 131 MN 1441 1VISON2I3H1 1331 s d SINE ua nva 5282257 7 IVISOWASHI AHI ma ree X18 avia my iip lVISOWH3HL lt 225 119 1H9IM W ERE NIML 9 0 39132 041708 Page 31 GOION310S
3. H31N009 u31Nn09 1 1 3 3 N i N V d 1 0 0 I u Y 1 1 i 0 N 9 151400 TV NO 318V1IVAV 13IHS 9 151400 TIY NO 318V1IVAV 0Q13IHS LON SYIWYYM TIY 310N or 1 SYINYYM TIV ILON l 918 or ASSY HOLIMS 108105 ASSY HOLIMS 1081000 NSS IHAN NEDAM v OIMIHM v 0 Hj 0 dau 2 YIWYYM NOLIVLS TATUR 2 d d 18 d 0 i 1 h AA AI NOTA ort OW 1 2 105 3534510 ioo N 0 0 WNOLLdO 2 CWNOLdO Tg 2 H31V3H PETS WU31V3H NYYM 933 U31V3H NYYM 933 Vi fr8 n JVISOWYJHL 1VISOWH3HL 1081502 i puno19 5155209 a 0 484 4 Eu M38 1 1 Nd9 siapo HOLIMS 440 NO NIYIN 3SVHd 319 16 GND 3HIM OV 092 021 Po Ed 3HIM OV 802 051 c 58 Z 3409 ASSY HOLIMS 1081409 pun019 N 9 0 NIML INOIXV INVdSVId SNIdIA 9ILVIN3HO9S 39132 041708 Page 38 9N01 13 31 NOLLWHOdHOO D9IIVIN 0 NNn8 800249 80 90 VSL00 77066 13 31 1H0HS 38034 13431
4. Doa 2 J 15 s E Sa T f3B Aviad Iyi 1 m E3B 88 222359 SdV NIML 39132 041708 33 rc po SCHEMATIC WIRING DIAGRAM X AXIOM 5 MAIN ON OFF SWITCH Late20 amp 35 Models only i a p BLK 14 L BLK Model 20 amp 35 BLK Model 15 LIMIT WHI 14 Model 20 THERMOSTAT RED 14 Model 35 Caka N BLU 14 BLK 14 sg Model 15 _ __ KEEP WARM HEATER BREW STATION WARMER WHWRED CONTROLLED BY ON OFF SW 1 55 h DISPENSE 3 UM EN T li OR BIGHT WARMERS n 0 BRN BLK BRN BLK 92 FRONT WARMER whi 61 WHI E cias WHI BLU WHI RED WHIVIO BE 0 1 A WHI GRN POLARIZED R 21 10 THREE PIN D CONTROL SWITCH ASSY ss LEFT WARMER ow CONNECTOR STATIC NOTE ALL WARMERS ARE NOT P2 SHIELD AVAILABLE ALL MODELS i YEL WHI CONTROL SWITCH ASSY CODES ON LEFT ON TOP ON RIGHT J2 10 PLEFTFRONT o LEFTREAR AT TOPFRONT A TOPREAR 6 PRIGHTFRONT 4 1 6 LEVEL PROBE 7 SHORT LEVEL PROBE LONG OPTIONAL DUAL TOP WARMER ASSY BLK 120V AC
5. wat com DISPENSE IN com pet DISPENSE No WHUGRN BLK Jol BLK N n s fol wanu Cg lof wame 1B 10 1 IR le WHUGRN iD wasa BE 1 n Eu SHIELD ie SHIELD ie M T IN IN le H i IR 5 10 19 iL iL i el 1 I iL ta LEN GRN Eum LETT 2 lel BLK zz LEVEL PROBE SHORT LEVEL PROBE SHORT LEVEL PROBE LONG LEVEL PROBE LONG Page 46 39132 101310 SCHEMATIC WIRING DIAGRAM AXIOM TS TERMINAL BLOCK MAIN ON OFF SWITCH BLK GRN YEL RED THERMAL FUSE THERMAL FUSE J1 1 4 lt an CONTROL SWITCH ASSY STATIC SHIELD CONTROL SWITCH ASSY CODES ovorr S J _ J eS ee ee BREW A paw CT uv I y j s LEVEL PROBE SHORT o uo s STARTBREW M LEVEL PR0BE LONG LEFTHIDDEN RIGHTHIDDEN 82 C 2 DIGITAL pi BREWER 72 100 200 VOLTS CONTROL T j 2 WIRE GND SINGLE PHASE 29077 0025A 10 11 2011 BUNN O MATIC CORPORATION 50 60 HZ Page 47 39132 071111 W0123NNO9 NId 338HL 037139104 V 40 d
6. 15 Level Probes Sri kunata wa au D 16 Early Bell Malis u m S muku Cu 17 Eater Refill AWG uuu Ee ratos cota btt ted 18 TARE PIBALBE E become 20 Limit Thermostat het DATA I hoe ete 21 i Rea Meer 21 Blanket Warmer onere sua oa 22 Termperdture PFODB dte Dar dede edes 23 Warmer Elements 24 Voltage u usa 25 a nayasa A a SAT 26 rot ae GUAE S ER TU m 27 Programming Level 29 30 a syair tete shka he appart 34 Page 3 39132 062309 TROUBLESHOOTING Atroubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered If the problem remains after exhausting the troubleshooting steps contact the Bunn 0 Matic Technical Service Department Inspection testing and repair of electrical equipment should be performed only by qualified service person nel All electronic components have ac line voltage and some have low voltage dc potential on their terminals Shorting of terminals or the application of external voltages may result in board failure Intermittent operation of electronic circuit boards is unlikely Board failure will
7. 380Ud 13A31 1 13431 qu Ph ales Di What Vio i 4 i 0 uc l I x 2 513000 TW NO 318VTIVAV qais 1 170 3100 2 YIS er ASSY HOLIMS 103109 a THM NUSTHM d V 0 THM G3u IHM 8 NOLIVLS J nanm 1 S 1 THM 1 ir 0 xd Tia N 1 05 3SN3dS 0 st 29 yainnoo Lise i Y31V3H W31V3H NHVM 933 0 J 2 4 1 1081 02 puno15 15560 ia 0 11190 ca 4 a 00 18 18 18 N300IH 1331 1915 uvdu 1H9IH sv INO 9v 401 1403 401 1431 3 ev NOLIVIS M388 NO 1431 NO SYIWYYM 2 SHIWHYM SHINYYM 2 3009 ASSY HOLIMS 1081N09 DUn019 yey NOl1Vd0dHO9 21020 21 00 9600 066 380Ud 13A31 1 13431 1 3 171 N sy d H0193NN03 1 0 09219109 V 30 4 N JYV d 0 8 151300 TIY NO 318V1IVAV 13 5 1ON3UVSUJWUVM
8. WARM ER WHI WHI DISPENSE L2 THERMAL FUSE REFILL WHI BLU CONTROL SWITCH ASSY CODES 2 WARMERS 2 WARMERS 2 WARMERS ON LEFT ON TOP ON RIGHT LEFTFRONT f J o LEFTRER AD TOPFRONT L 5 j TOPREAR 46 PRIGHTFRONT 5 RGHTREAR J 39132 041708 Earth Ground SCHEMATIC WIRING DIAGRAM x DV APS C MAIN ON OFF SWITCH i Late Models only Chassis Ground BLK SELECTOR ieu WHI 14 EE i TANK HEATER I BLK 14 BLU 14 BLK 14 BLU 14 H 0 0 I TANK HEATER e 1425W H WHI VIO 14 7 7 RED 14 KEEP WARM HEATER 7 2268W WHI REFILL WHI BLU DISPENSE h BLU 14 D WHI GRN C RELAY n BLK 14 D 0 t m S 1 T R 0 L p J15 C B 0 A R J1 10 D CONTROL SWITCH ASSY STATIC T SHIELD 0 OT R 0 12 6 P B2 iy 12 10 Be Sonat reale SA E ERU CONTROL SWITCH ASSY CODES igerrroNT 2 f IETIRAR j TOPFRONT TOPREAR 46 RIGHTFRONT A LEVEL PROBE SHORT _RIGHTREAR LEFT HIDDEN 120V AC 2 WIRE GND STEPH LONG 120 208V AC 3 WIRE GND 120 240V AC 3 WIRE GND SINGLE PHASE 29077 0018A 11 08 2008 BUNN O MATIC CORPORATION Page 42 39132 041708 SCHEMATIC WIRING DIAGRAM 9 5 SI
9. 1H0HS 13431 d01 1 1 3 1 N V i i I HOLOSNNOO 1 I 0 0 i aaziuW10d Y i Y 40 SNId m 0 3uv d 0 8 151400 17 NO 318v 1IVAV 5 8 Zd Id 2 iSTAGOW TIY NO 318v 1IVAV z TIV 310N 20015 1ON3uVSH3AHVM TIV 310N 944 i ASSY HOLIMS 1081N02 a ASSY HOLIMS 1081N02 a NHS IHM HM NH8S IHM 9 gd 0 0 0 g g EN am PE E ama 3 x 4 1 1 Xx 0 a wu 0 NESTA scp ON 1 NHS IHM me ON 1 reo woo N rm woo N 0 0 I NOILdO Wul 3 J X18 218 Tidy 43109 61 YALWIH INHVM 9935 YALWIH INHVM 9935 peer ea 1081102 14 WHIG ca 4 j f wau 1 w w 1HOIH 9v 401 sv 1044401 1 cw v e wNouvis wu 9 15509 9181 HOLIMS 330 NO NIYIN 3SVHd 3 19NIS 3HIM OV A0tZ OCL E OV 802 021 ue
10. INOIXV 53002 ASSY HOLIMS 1031409 39132 041708 39 SCHEMATIC WIRING DIAGRAM AXIOM APS 11 N GRN YEL GRN Chassis Ground Chassis Ground Earth Ground MAIN POWER iw LIMIT e THERMOSTAT e 7A BLU 14 BLK 14 TANK HEATER KEEP WARM HEATER REFILL BRN BLK WHI BLU gt CONTROL SWITCH ASSY j STATIC SHIELD CONTROL SWITCH ASSY CODES ON LEFT ON TOP ON RIGHT BREW STATION J3 3 LEFTFRONT LEFTREAR J A OT TOPFRONT J aa j f J9 1 TOPREAR 46 RIGHT FRONT o A EUN IIS LEVEL PROBE SHORT RIGHTREAR 9 LEVEL PROBE LONG 100V AC 2 WIRE SINGLE PHASE 290770016B 11 09 2008 BUNN O MATIC CORPORATION Page 40 39132 120309 SCHEMATIC WIRING DIAGRAM AXIOM APS GRN YEL L1 WHI C N THREE RON To R 0 BRN BLK E gu WHI BLU P WHI RED C YEL B WHIAIO 0 VIO A R 10 D J2 10 230 VOLTS CE 2 WIRE GND SINGLE PHASE 50 HZ THERMOSTAT STATIC SHIELD BLK i EMI FILTER FUSE WHI GRN CONTROL SWITCH ASSY LEVEL PROBE SHORT LEVEL PROBE LONG 29077 0017A 10 08 2008 BUNN O MATIC CORPORATION Page 41 THERMAL BLK 14 WHI 14
11. ANYL 1H9123 J 1H9 Se Reseed PS Avis lvISOWHJHL 1HOl na Eafe ee oo ya NIML 2 9 39132 041708 32 L3NYTE 3105 ONY gION310S 3sN3dsi 1331 77535 1397 SON P QNS HH FH ri rj 5 5 9 2 bi 8 L ASSY 9 3ou1Noo 1437 5 J r J J 4 2 ong P4 HOLIMS 440 NO NIYA PLT TO cj cn 6 9 9 fyc e LI D ore 6 8 N39 1HM EN j ASSY TANYA fF N 2 lt d 5 5 J 5 5 1HM 2 g LI o Saas 133NV 18 ONY QION310S Ti38 LAO 1V1SONS3H1 1597 1 ANYL Lg 133NV 18 29 JlVISOWM3HL 1331 valv3H haz espes ES
12. ai 28 di a 0 1 N 0 2 013IHS teat Se VLS ASSY HOLIMS 1081N02 NH5 HA MHM THM hh H NY9 IHM 35 34510 frig IHM 0 n8 Tiu yainnoo H31V3H PETS W31V3H INHVM 933 vim 1918089 HL 3SVHd 319 15 QNO OV 0 2 061 QNO OV 802 0 1 oco2rros 20 39132 061710 Page 45 SCHEMATIC WIRING DIAGRAM 29077 0023 11 11 2011 BUNN 0 MATIC CORPORATION CONTROL SWITCH ASSY CODES Earth Ground 2 WARMERS 2 WARMERS 2 WARMERS AXIOM TWIN APS TC ONLEFT ONTOP ON RIGHT TERT FRONT ra 100 200 VOLTS AC ra 230 VOLTS AC CE MAIN ONOFF SWITCH 2 WIRE GND OPTIONAL RIGHT REAR or SINGLE PHASE 50 60 HZ i RIGHT HIDDEN 27 DIGITAL Chassis Ground Chassis Ground CEONLY BLK 4 LMT UMT THERMOSTAT THERMOSTAT 4 KEEP WARM HEATER KEEP WARM HEATER BLK FUSE gee FUSE Exodi a PUN e METER HIA ES REFILL ME COUNTER o REFILL H3
13. PLEASE RE PAIR PROBABLE CAUSE 1 Lime buildup in sprayhead 2 Lime buildup in brew valve 3 Lime buildup in brew tank 2 Lime buildup in brew valve 3 Lime buildup in brew tank WARNING VERY LOW FLOW 1 Lime buildup in sprayhead PLEASE REPAIR Temperature Too Low Heating Time Too Long Fill Time Too Long 2 Lime buildup in brew valve 3 Lime buildup in brew tank 1 Water temperature in the tank does not meet the ready tempera ture 1 Tank Heater failure 2 Control Board Thermistor fail ure 1 Water shut off to brewer 2 Supply line too small or ob structed 3 Inlet Solenoid failure 4 Control Board Failure 5 ON OFF switch is OFF Temp Sensor Out Of Range Check 1 Temperature Sensor Probe For Bad Connections Temp Sensor Out Of Range Check Wire For Shorts open 1 Temperature Sensor Probe wire s shorted Page 9 WARNING INACCURATE FLOW 1 Lime buildup in sprayhead REMEDY Clean sprayhead Clean valve Clean tank Clean sprayhead Clean valve Clean tank Clean sprayhead Clean valve Clean tank A Wait for the brewer to heat to the proper temperature B Disable the BREW LOCKOUT function Refer to programming section for procedure Replace or repair as needed Replace or repair as needed Check water supply shut off Replace or repair as needed Replace or repair as needed Replace or repair as needed Turn switch ON Replace or repair as need
14. cont PROBLEM Dripping from sprayhead Weak beverage Dry coffee grounds remain in the funnel Low beverage serving tem perature PROBABLE CAUSE 1 Lime build up 2 Dispense valve 1 Sprayhead 2 Water temperature 3 Filter type 4 Coffee grind 5 Funnel loading 1 Sprayhead 2 Funnel loading 1 Warmer 2 Thermal server AirPot not preheated before brew cycle Page 8 REMEDY Inspect the tank assembly for excessive lime deposits Delime as required Check replace Aclean sprayhead must be used for proper extraction Place an empty brew funnel on an empty decanter beneath the sprayhead Initiate brew cycle and check the water tem perature immediately below the sprayhead with a thermometer The reading must not be less than 195 F 91 C Adjust the temperature setting to increase the water temperature Refer to Initial Set up instructions BUNN paper filters must be used for proper extraction Afine drip or grind must be used for proper extraction The BUNN paper filter must be centered in the funnel and the bed of grounds leveled by shaking gently Make sure sprayhead is pres ent and holes are clear and unobstructed The BUNN paper filter must be centered in the funnel and the bed of grounds leveled by shaking gently Check replace Preheat server 39132 041708 DIAGNOSTICS MESSAGE CHECK SPRAYHEAD FOR LIME CHECK FITTINGS FOR LIME T00 MUCH LIME
15. normally be permanent If an intermittent condition is encountered the cause will likely be a switch contact or a loose connection at a terminal or crimp Solenoid removal requires interrupting the water supply to the valve Damage may result if solenoids are energized for more than ten minutes without a supply of water The 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 This brewer is heated at all times Keep away from combustibles WARNING Exercise extreme caution when servicing electrical equipment Unplug the brewer when servicing except when electrical tests are specified Follow recommended service procedures Replace all protective shields or safety notices Before assuming a faulty control board check for the following Control Boards 1 Make sure ribbon cable is properly attached to the control board ALL PINS INSERTED INTO PLUG 2 Make sure there is a nylon insulating washer under each screw head that holds the control board to the plastic front end cap This is important for proper operation 3 Make sure before servicing brewer that voltage is present at control board 4 Press any warmer switch if equipped or observe if any indicator lights are glowing on the control panel If so proceed with testing If not check fo
16. the two terminals on the blanket warmer Refer to chart below If resistance is to specification reconnect the two wires to the blanket warmer If resistance is notto specification replace the blanket warmer Removal and Replacement 1 Disconnect the blanket warmer wire from the pig gyback terminal on the refill valve 2 Remove the tank assembly from the brewer 3 Peel old blanket warmer off tank 4 Install new blanket warmer on tank with bottom of blanket 11 from bottom of tank 5 Connect one of the white wires to the piggyback terminal on the limit thermostat 6 Reinstall tank assembly 7 Connect the other white wire to the piggyback terminal on the refill valve WARMER RESISTANCE 50W 120V 288 0 0 50W 220V 968 0 0 39132 041708 TEMPERATURE PR0BE TE If resistance is to specification replace the control al X board gt If resistance is not to specification replace the tem perature probe Removal and Replacement 1 Disconnect the brewer from the power source 2 Disconnect the two pin connector from J9 on control board 3 Pull temperature probe out of it s grommet 4 Install in reverse order FIG 23 1 TEMPERATURE PROBE Location The temperature probe is inserted through the tank lid assembly Test Procedures 1 Disconnect the brewer from the power source 2 With a DC voltmeter check voltage across the two wires at J9 on control board Black probe to black wire re
17. 0V position check for continuity between the two right terminals of the switch 3 With the selector switch in the 120 208 240V position check for continuity between the two left terminals If continuity is not present as described replace the switch FIG 25 2 VOLTAGE SELECTOR SWITCH TERMINALS Page 25 39132 041708 MASTER ON OFF SWITCH Removal and Replacement 1 Disconnect the brewer from the power source 2 Disconnect the wires from the power switch 3 Removethe switch mounting screws from the left side of trunk 4 Install new switch in trunk with the two 6 32 x 14 mounting screws Location The rocker switch is located on the left side of the trunk behind the front access panel on some earlier models The toggle switch on later models is located on the back of the trunk Test Procedure FIG 26 2 TOGGLE SWITCH LOCATION 1 Disconnect the brewer from the power source 2 Disconnectthe wires from the power switch With the switch in the ON position check for continuity between the upper and lower terminals on each side of the switch There should be continuity between the two left ter minals and between the two right terminals when ON no continuity when OFF If continuity is not present as described replace the switch FIG 26 3 ROCKER SWITCH Page 26 39132 052410 PROGRAMMING FUNCTIONS LEVEL 3 FLOW CHART REVERSE CAL TEMPERATURE NO SENSOR YES Beewer 72
18. 2 WIRE 120 208V AC 3 WIRE 120 240V AC 3 WIRE SINGLE PHASE 29077 0006D 02 09 2006 BUNN O MATIC CORPORATION Page 34 i BLK o RED Model 35 WHI 20 CIS rix 39132 052709 SCHEMATIC WIRING DIAGRAM AXIOM L1 L2 GRN YEL BLK EMI FILTER BLK wn LIMIT THERMAL THERMAL BLK 14 BLU 14 FUSE FUSE le 6 I BLK 14 TANK HEATER WHI 14 I I THERMOSTA WHI WARM WHI WHI BREW STATION WARMER CONTROLLED BY ON OFF SW I 1 WHI RED p BLU 14 BLK 14 22 BRN BLK 72 BRN BLK FRONT WARMER WHI 0 I R 0 WHI BLU E C B 0 A R D DISPENSE 79 WHI RED P3 ARE u PINS OF A HUGHES j WHI GRN THREE PIN CONNECTOR CONTROL SWITCH ASSY P STATIC NOTE ALLWARMERSARENOT yer P2 FRONTWARMER wy WHI SHIELD AVAILABLE ALL MODELS WHINVI0F3 REAR WARMER i J2 6 2 10 J3 1 BREW STATION J3 3 LEFTFRONT a LEFTREAR m j y TOPFRONT A J9 1 TOPREAR j RIGHTFRONT LEVEL PROBE SHORT RIGHT REAR START BREW m m M LEVEL PROBE LONG 220 240 VOLTS CE 2 WIRE GND SINGLE PHASE 29077 0007c 11 13 2006 BUNN 0 MATIC C
19. BUNN AXIOM SERIES SERVICE amp REPAIR MANUAL BUNN 0 MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 www bunn com p 39132 0000G 03 14 2008 Bunn 0 Matic Corporation BUNN 0 MATIC COMMERCIAL PRODUCT WARRANTY Bunn O Matic Corp BUNN warrants equipment manufactured by it as follows 1 Airpots thermal carafes decanters GPR servers iced tea coffee dispensers MCR MCP MCA single cup brewers ther mal servers and ThermoFresh servers mechanical and digital 1 year parts and 1 year labor 2 All other equipment 2 years parts and 1 year labor plus added warranties as specified below 8 Electronic circuit and or control boards parts and labor for 3 years b Compressors on refrigeration equipment 5 years parts and 1 year labor c Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis parts and labor for 4 years or 40 000 pounds of coffee whichever comes first These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period This warranty does not apply to any equipment component or part that was not manufactured by BUNN or that in BUNN s judgment has been affected by misuse n
20. NGLE AXIOM 15 20 8 35 4 s FEP 1 i MAIN ON OFF SWITCH i Z Si Late20835 Models only i T IS i 9 mu BLK 14 eee BLU 14 BLK 14 TANK HEATER pE 14 09e 9S Soon oe WHL Model 15 KEEP WARM HEATER BREW STATION WARMER WHi RED CONTROLLED BY ENABLE BREW SW REFILL Pot use ose DISPENSE C Qs ere N T R 0 L P C B 0 A R D 5 29 CONTROL SWITCH j STATIC NOTE ALL WARMERS ARE NOT SHIELD AVAILABLE ON ALL MODELS J2 10 CONTROL SWITCH ASSY CODES LEFT HIDDEN RIGHT HIDDEN DIGITAL LEVEL BREWER 7 SHORT CONTROL LEVEL PROBE LONG 120V AC 2 WIRE 120 208V AC 3 WIRE 120 240V AC 3 WIRE SINGLE PHASE 29077 0019A 03 09 2009 BUNN O MATIC CORPORATION Page 43 39132 041708 SCHEMATIC WIRING DIAGRAM AXIOM L1 L2 GRN YEL THERMAL THERMAL BLK 14 BLU 14 FUSE FUSE BLK 14 TANK HEATER WHI 14 WHI KEEP WARM HEATER WHI WHI BREW STATION WARMER WHI RED CONTROLLED BY ON OFF SW REFILL suv estes DISPENSE WHI GRN 5 RELAY BLK 14 N ya qeu T i I P2 P1 0 BRN BLK BRN BLK zz WHI WHI BLU WHI RED ae Sg P3 ARE 0 PINS OF A A WHI GRN POLARIZED R J 10 THREE PIN D CONTROL SWITCH ASSY CONNECTOR S
21. ORPORATION 50 60 HZ Page 35 39132 010914 SCHEMATIC WIRING DIAGRAM AXIOM DV MAIN ON OFF SWITCH i Late Models only BLK SELECTOR LIMIT SWITCH THERMOSTAT TANK HEATER BLU 14 BLK 14 7 n BLU 14 ri TANK HEATER 1425W jp WHI VIO 14 n I RED 14 KEEP WARM HEATER 777 d 2268W BREW STATION WARMER CONTROLLED BY ON OFF SW WHI RED REFILL DISPENSE BLU 14 C BLK 14 0 N T R 0 L P1 P2 amp B P3 ARE 0 PINS OF A A POLARIZED R 41 10 THREE PIN LEFT WARMER CONNECTOR CONTROL SWITCH ASSY STATIC NOTE ALLWARMERSARENOT gt yz P2 SHIELD AVAILABLE 0N ALL MODELS P WHI WHIVIO J2 6 J2 10 Lira 9 pir L a T Top REAR As FRONT L I P LEVEL PROBE SHORT CRIGHTREAR w 120V AC 2 WIRE GND CONG 120 208 3 WIRE GND 102 02 o E 120 240V 3 WIRE GND SINGLE PHASE 29077 0008B 01 07 2006 BUNN O MATIC CORPORATION Page 36 39132 041708 29077 0012 obsolete refer to 29077 0022 Page 37 4 9IIVIN O NNfI8 002 80 00 97100 066 T3A31 9N01 380Ud 13A31 1H0HS 380Hd T3431 1H0HS 34084 13431 SYJWYYM 301 1 9 SYJWHYM 301 1437
22. S s o0l8 1 b 4 3 Fu pa ee S a ne ee ee i 0 6 OIA 1HM 8 mz 9 guvog NIV 8 5 H 2 Se 1HM XINO 9 T300N 5 8 gun de HOLIMS 440 NO ST3QON D i 2 D 1 TWNINMAL 1 2 g ws LWISOWSSHL M3IV3H NYL ee OL HOLIMS 01 1 H H 44043 395 away IWNOILdO X 18 Nu8 uU sss 9178 59 NO 0351 LON SNIML 1d39X3 1390 TIV 2018 39132 041708 o
23. TATIC NOTE WARMERS 1 P2 SHIELD AVAILABLE ON ALL MODELS WHI WHI VIO WHIWIOE J3 3 LEFTFRONT LEFT REAR J9 1 IR TOPREAR e RIGHTFRONT _ A LEVEL PROBE SHORT RIGHTREAR LEVEL PROBE LONG 100 VOLTS 2 WIRE GND SINGLE PHASE 29077 00208 04 10 2009 BUNN 0 MATIC CORPORATION 50 60 HZ Page 44 39132 061710 9N01 T3A31 1H0HS 13431 1 amp di 18 0 q 1 N 0 2 1 5 9 ASSY HOLIMS 1081N09 REDE THM Mal re NYS AHM 1 0140 wig 434109 71534 U31V3H NL WU31V3H NYYM 933 ym IVISOWH3H1L NaGGIH 1441 Aug 18VIS f 1 v Wi 133110 1 083 1441 NOLIVIS NO Su3l vM 2 3002 ASSY HOLIMS 1031409 punoJ5 punosy 515507 oco2rrot co N cl NOl1VHOdH09 0 01009 01 90 vcc00 7 062 S000 99907 u d ULN H AINO 1809 H3M0d L SH3M388 juo HOLIMS 330 NO NIVIA 2000 0269 N d 13018 0 9046 ssauieg 21 IWOIXV INVH9VIG OILVIN3HOS 9N01 1331 1H0HS 38084 13431 1
24. TIW 310D 9uvis ASSY HOLIMS 1 2 7 a TAM NHS HA Vi EN 0 THM XT8 03u H3IWSVMA NOILVLS n d 18 1 THM THM 0 I THM 105 45 I 0 3 siapo 81e 1 HOLIMS 330 NO Hrm 105 0 M3IV3H PETE W31V3H INHVM 933 3SVHd 319 6 U pri Z NYL H31N005 OV L A802 021 INOIXV 9ILVIN3HO9S 39132 021512 Page 48
25. ch to the position to prohibit anyone from changing the settings With the switch in the ON position only Level 1 can be accessed by store personnel Technicians can access Level 1 with the switch in either position To enter Levels 2 3 amp 4 press and hold right hidden switch 39132 062309 COMPONENT ACCESS This section provides procedures for testing and replacing various major components used in this brewer should service become necessary Refer to Troubleshooting for assistance in determining the cause of any problem WARNING Inspection testing and repair of electri cal equipment should be performed only by qualified service personnel The brewer should be unplugged when servicing except when electrical tests are re quired and the test procedure specifically states to plug in the brewer WARNING Disconnect the brewer from the power source before the removal of any panel or the replace ment of any component All components are accessible by the removal of the top cover or warmer housing front access panel and warmer plate s Refer to wiring diagrams at the back of this manual FIG 11 1 COMPONENT ACCESS when reconnecting wires FIG 11 2 COMPONENT ACCESS Page 1 1 39132 062309 CONTROL BOARD FIG 12 1 CONTROL BOARD Location The Control Board is located inside the top cover behind the front face plate Test Procedures The test procedures for the control board will vary depen
26. ctor the control board making sure every pin on the control board is inserted into the ribbon cable connector Wrap a thin paper clip around each meter lead and extend past the tip by 1 4 1 You may need to sand off the clear coating on some clips FIG 14 2 MEMBRANE SWITCH CONTINUITY Page 14 39132 100609 FIG 15 1 BREW VALVE Location The brew valve is located inside the top cover behind the front face plate Test Procedures 1 Refertothe Programing Section for Service Tools Test Outputs Brew Valve 2 Besure brew funnel amp server are in place before activating valve 3 Checkthe valve for coil action Turn on the valve with the test mode Listen carefully in the vicinity of the brew valve for a click as the coil pulls the plunger in If no sound is heard as described proceed to 4 If the sound is heard as described there may be a blockage in the valve hose tank or sprayhead Dis connect the brewer from the power source Remove the valve and inspect for blockage and de lime all related areas 4 Connectthe voltmeter leads to the coil terminals Turn on the valve with the test mode NOTE Due to the internally rectified coil the indication will be 120VAC potential all the time Option 1 The actual a c volt reading will slightly in Crease or go higher than the potential reading when you turn on or activate the brew valve Option 2 Install an amp clamp around one dispe
27. d covers and refer to Initial Set up for refill and operation FIG 18 2 REFILL VALVE 39132 041708 REFILL VALVE LATER MODELS 5 5 Disconnect the brewer from the power source 6 Check for continuity across the refill valve coil terminals If continuity is not present as described replace the refill valve If continuity is present as described there could be some debris in the valve Removal and Replacement 1 Remove both wires from the refill valve 2 Verify that the white shutoff clamp between valve and tank is squeezed shut 3 Disconnect both water lines at the valve 4 Removethetwo 1 4 20 screws securing the valve to the component mounting bracket 5 Usingthetwo 1 4 20 screws install the new valve to the component mounting bracket 6 Securely fasten the water lines to the valve 7 Refer to wiring diagrams when reconnecting the wires FIG 19 1 LATER REFILL VALVE 8 Installaccess panels and covers and refer to Initial Set up for refill and operation Location The refill valve is located inside the front of the brewer Test Procedures 1 Enter programming level 2 scroll to Service Tools then scroll to Refill Valve 2 Briefly activate the refill valve in the test mode With a voltmeter check the voltage across the coil wires Theindication mustbe 120 volts acfortwo wire 120 Flow Control Body volt models and three wire 120 208 240 volt models or 230 volts ac for two wire 230
28. d probe to white wire Refer to FIG 18 2 Connect the brewer to the power source The indication should be approximately between 4vdc cool to 1vdc at ready temperature 3 Disconnect the brewer from the power source If voltage is present as described circuit is working correctly check limit thermostat and TCO on 230V models If voltage is not present as described proceed to 4 4 Disconnecttemperature probe from J9 control board Check the resistance across the two ter minals of the temperature probe The indication should be approximately between 10 5Ko cool to 8700 at ready temperature Page 23 39132 041708 WARMER ELEMENTS FIG 24 1 WARMER ELEMENTS Location The warmer element s is located under the warmer plate Test Procedures 1 Disconnect the brewer from the power source 2 With a voltmeter check voltage across the two wires at the warmer element with the ON OFF switch in the position Connect the brewer to the power source The indication must be 120 volts ac for two wire 120 volt models and three wire 120 208 and 120 240 volt models or 230 volts ac for two wire 230 volt models 3 Disconnect the brewer from the power source If voltage is present as described proceed to 74 If voltage is not present as described refer to Wiring Diagrams and check wiring harness 4 Checkthe resistance across the two terminals on the warmer element Refer to chart below If resistance i
29. der the heads of the two screws to prevent a possible shorting of the control board circuits 10 Re install faucet assembly if equipped 11 Re install faceplate board assembly 12 Re install wires amp connectors 39132 061809 MEMBRANE SWITCH FIG 14 1 MEMBRANE SWITCH Location The Membrane Switch is located on the front face plate Test Procedures There are two methods for testing the membrane switch The easiest method is to use the built in test mode Refer to the Programing Section for Service Tools Test Switches If for some reason you can t get into the program modes or brewer won t power up you can test it with an ohmmeter or continuity tester Refer to the schematic to trace the appropriate pins NOTE Pin 1 is the static shield amp will not provide a reading to the other pins There are two commons in this circuit pins 9 amp 10 Disconnect brewer from power source before discon necting ribbon cable from control board Removal and Replacement 1 Disconnectthe ribbon cable from 10 pin connector on the control board 2 Gently peel the membrane switch from the front face plate assembly 4 Remove any adhesive that remains on the front face plate 5 Remove the adhesive backing from the new mem brane switch Insert the ribbon cable through the slot in the front face plate and apply the membrane switch to the front face plate 6 Connectthe ribbon cableto the 10 pin conne
30. ding upon the problems experienced by the brewer Refer to the Troubleshooting section which is divided into three sections Refill Circuit Heating Circuit and Brewing Circuit Check for Power to board 1 Insert one meter lead in J1 pin 1 and the other lead in J1 pin 2 2 With the power connected to brewer the voltage reading to the board should be the line voltage rated for that model If no voltage is present check wiring to the board If voltage is present and brewer does not power on replace board Removal and Replacement 1 Disconnect brewer from power source 2 Disconnectthe wires from the relay on the control board 3 Disconnect the 10 pin connector main harness and the 3 pin connector level probe harness from the control board 4 Disconnect the 10 pin connector ribbon cable from the control board Page 12 5 Remove the two screws and two nylon washers securing the control board to the front face plate 6 Tilt the control board inward to clear the display section 7 Place the bottom edge of the new control board in the two cradles tilt the board forward and secure with the two screws and nylon washers to the front face plate NOTE The nylon washers must be installed under the heads of the two screws to prevent a possible shorting of the control board circuits 8 Re install wires amp connectors BEFORE REPLACEMENT If a triac or MOV is visibly burned it was most likely caused by an ext
31. e starts then aborts and returns to Main screen after 20 seconds SB 153 PROBABLE CAUSE 1 Display s error message 2 No water 3 No power or incorrect voltage to the brewer 4 ON OFF switch not in the ON position 5 Low water temperature Brew lockout is enabled 6 Water not touching refill probe inside tank 7 Membrane Switch 8 Dispense valve 9 Control board 1 Brew volume NOTE Volume adjustments must be made with sprayhead installed 2 Lime build up 3 Dispense Valve 1 Level probes shorted 2 On pour over models the opera tor poured in water and pressed the start button Page 7 REMEDY Brewer has shut down due to mal function See Diagnostics Water lines and valves to the brewer must be open Check for voltage across the termi nals at the terminal block The indicator lamp must be lit Allow brewer to heat until ready or disable the brew lockout feature Water must be in contact with refill probe before brew cycle will start Check replace Check replace Check replace Inspect the dispense valve and sprayhead for excessive lime de posits Delime as required Remove dispense valve and clear any obstructions Rebuild or replace valve if necessary See page 24 Check replace Delime as required Ensure mylar shield s are installed on top cover Instruct operator to use one proce dure but not both 39132 061809 TROUBLESHOOTING cont BREWING CIRCUIT
32. e to the long probe Proper initial set and keeping mineral build up off the probes grommets is required for this system to operate properly A brew abort feature is built in In the event that the drop in water level from the short probe to the long probe takes too long the brew cycle will abort and return to the main screen This could be caused by Mineral build up on probes grommets very hard water probes shorting to top cover verify the mylar shield s are installed plugged outlet ie sprayhead limed up incorrect operator use with the pour over model ie pour in water and pressing start button Test Procedures 1 Enter programming level 2 scroll to Refill NOTE This screen only reads the long probe blue wire and is used for setting the refill conductance threshold Alternate Scroll to Service Tools Then scroll to LP1 amp LP2 LP1 short probe LP2 long probe 39132 061809 Page 17 REFILL VALVE EARLY MODELS FIG 18 1 REFILL VALVE Location The refill valve is located inside the front of the brewer Test 1 Enter programming level 2 scrollto Service Tools then scroll to Refill Valve 2 Briefly activate the refill valve in the test mode With a voltmeter check the voltage across the coil wires Theindication mustbe 120 volts ac fortwo wire 120 volt models and three wire 120 208 240 volt models or 230 volts ac for two wire 230 volt model
33. ed Replace or repair as needed 39132 041708 TECHNICIAN PROGRAMMING REMINDERS REVERSE FORWARD AXIOM mmm VERSION eR x wx VIEW ASSET SERIAL ENTER PROGRAMMING ACCESSING PROGRAM MODES Press and hold the right hidden switch The longer you press it the higher the level you can access EXAMPLE Pressing for a couple seconds enters Level 1 Continuing to press for approximately 5 seconds will access Level 2 Continue pressing for approximately 15 seconds to access Level 3 During program modes use the right hid den switch to advance forward through screens Use left hidden switch to step backwards through screens VIEWING ASSET AND SERIAL NUMBERS Press left hidden switch to view Asset number Press and release to view serial number Press and release again to view the installed software version FACTORY BLOWOUT MODE When in the main screen DO NOT press both left and right hidden switches at the same time The display will read FACTORY BLOWOUT ON OFF WARNING NEVER activate this mode It will open the brew and refill valves simultaneously THIS IS FOR FACTORY USE ONLY If you accidentally enter this screen exit out of it by pressing the ENABLE BREW ON OFF switch PROGRAMMING LOCKOUT SWITCH Mounted on main control board This switch can be set to prevent access to Level 2 Turn OFF the switch to access Technician Level 2 Once all the correct brew settings are programmed the Technician can set the swit
34. eglect alteration improper installation or operation improper maintenance or repair non periodic cleaning and descaling equipment failures related to poor water quality damage or casualty In addition the warranty does not apply to replacement of items subject to normal use including but not limited to user replaceable parts such as seals and gaskets This warranty is conditioned on the Buyer 1 giving BUNN prompt notice of any claim to be made under this warranty by telephone at 217 529 6601 or by writing to Post Office Box 3227 Springfield Illinois 62708 3227 2 if requested by BUNN shipping the defective equipment prepaid to an authorized BUNN service location and 3 receiving prior authorization from BUNN that the defective equipment is under warranty THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY WRITTEN OR ORAL EX PRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE The agents dealers or employees of BUNN are not authorized to make modifications to this warranty or to make additional warranties that are binding on BUNN Accordingly 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 op tion while the equipment is under warranty shall either 1 prov
35. erature IMPORTANT Make sure no tem perature tests are taken before the display reads ready Tank tem perature must be stabilized before readings are taken Spitting or excessive steaming cont Brewer is making unusual noises PROBABLE CAUSE 1 Display s error message 2 Water not touching main short level probe 3 Water Level Probe Sensing System 4 Temperature Probe 5 Limit Thermostat or TCO 6 Tank Heater 1 Lime build up on temperature probe tank or tank heater 2 Temperature Probe 3 Control Board 1 Plumbing lines 2 Water supply 3 Lime build up Page 6 REMEDY Brewer has shut down due to mal function See Diagnostics Remove level probe and grommet Look into hole on tank lid Water must be within approximately one inch from top of tank Check refill circuit Heaters will not turn on if water is not grounding level probe Check replace Check replace Check replace Inspect probe and tank assembly for excessive lime deposits Delime as required Check replace Check replace Plumbing lines should not rest on the counter top The brewer must be connected to a cold water supply Remove the tank lid and clean in side of tank with a deliming agent if necessary 39132 041708 TROUBLESHOOTING cont BREWING CIRCUIT PROBLEM J Brew cycle will not start Consistently low beverage level in thedispenseror beverage overflows dispenser Brew cycl
36. ernal sources such as a shorted wire or damaged solenoid coil Use the triac map below to trace the circuit in question and repair replace the component before replacing control board m 1 rl ye i 4 IE T MOVI M0V2 1 f 1 f 4 m TH1 Triac Map TH1 Warmer J1 7 TH2 MOV 1 Brew solenoid Q J1 10 TH3 Warmers Q J1 4 amp 8 4 0 2 Refill solenoid Q J1 5 TH5 Main warmer Q J1 6 39132 041708 FACEPLATE REMOVAL Faceplate Removal and Replacement 1 Disconnect brewer from power source 2 Disconnectthe wires from the relay on the control board 3 Disconnect the 10 pin connector main harness and the 3 pin connector level probe harness from the control board 4 Disconnect the 10 pin connector ribbon cable from the control board 5 Drain tank and disconnect remove faucet 6 Remove the 3 nuts and 1 standoff from back side of faceplate assembly 7 Removefaceplate and control board as an assembly out the front opening FIG 13 1 FACEPLATE REMOVAL Page 13 8 Remove the two screws and two nylon washers securing the control board to the front face plate 9 Placethe bottom edge of the new control board in the two cradles and secure with the two screws and nylon washers to the front face plate NOTE The nylon washers must be installed un
37. ide at no charge replacement parts and or labor during the applicable parts and labor warranty periods specified above to repair the defective components provided that this repair is done by a BUNN Authorized Service Representative or 2 shall replace the equipment or refund the purchase price for the equipment THE BUYER S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT WHETHER DERIVED FROM WARRANTY OR OTHERWISE SHALL BE LIMITED AT BUNN S SOLE OPTION AS SPECIFIED HEREIN TO REPAIR REPLACEMENT OR REFUND In no event shall BUNN be liable for any other damage or loss including but not limited to lost profits lost sales loss of use of equipment claims of Buyer s customers cost of capital cost of down time cost of substitute equipment facilities or services or any other special incidental or consequential damages 392 A Partner You Can Count On Air Infusion AutoPOD AXIOM BrewLOGIC BrewMETER Brew Better Not Bitter Brew WISE BrewWIZARD BUNN Espress BUNN Family Gourmet BUNN Gourmet BUNN Pour O Matic BUNN BUNN with the stylized red line BUNNlink Bunn OMatic Bunn O Matic BUNNserve BUNNSERVE with the stylized wrench design Cool Froth DBC Dr Brew stylized Dr design Dual Easy Pour EasyClear EasyGard FlavorGard Gourmet Ice Gourmet Juice High Intensity iMIX Infusion Series Intellisteam My Caf Phase Brew PowerLogic Quality Beverage Equipment Worldwide Respect Ea
38. ight 78 32 nuts securing the tank lid to the tank 12 Remove the two hex nuts securing the tank heater to the bottom of the tank Remove tank heater with gaskets and discard 13 Install new tank heater s with gaskets to the bot tom of the tank and secure with two hex nuts 14 Install tank assembly onto mounting brackets and secure in place with four 78 32 nuts 15 Install tank lid and secure in place with eight 78 32 nuts 16 Connect the two white wires of the tank warmer blanket 39132 041708 LIMIT THERMOSTAT FIG 21 2 LIMIT THERMOSTAT Location The limit thermostat is located inside the top cover on the front side of the tank Test Procedures 1 Disconnect the brewer from the power source 2 Disconnect the wires from the limit thermostat 3 With an ohmmeter check for continuity across the limit thermostat terminals If continuity is presentas described the limitthermostat is operating properly If continuity is not present as described replace the limit thermostat Removal and Replacement 1 Remove the wires from limit thermostat termi nals 2 Carefully slide the limit thermostat out from under the retaining clip and remove limit thermostat 3 Carefully slide the new limit thermostat into the retaining clip Ensure the metal face has good contact with tank Page 21 THERMAL CUT OFF 230V MODELS ONLY FIG 21 1 TCO CHECK Location The TCO s are located under the ta
39. l VERSION Brewer C fro 74 SERIAL AX00000000 AXIOM 00 DONE VERSION Brewer 72 d p Brewer 47 24 7 20 case board replacement match the Data Plate information SERIAL TYPE AX00 Standard Axiom with warmers 00 Axiom AirPot Server Notused Brewer Chu AXTS Axiom Thermal Server 00 Engineering Prototype Scroll down or up to set the serial number of the machine 200000000 NOTE Starting from the right each digit will control the next digit DONE like an odometer pm Brewer Cuno Page 29 39132 062309 i i 1 M3IVJH i H E i H 2n i 2 1331 3 2 qioN31os 1 3015 QION310S i STIGOW S E ri H s E
40. m SPRAY OZ M DONE ENTERING LEVEL 3 FORWARD AXIOM VERSION C fro 74 LimeAdjust OFF LPt gt LP2 07 4 50 DONE 4 DONE Beer um p CALIBRATE FLOW AXIOM NO YES VERSION Z Jal Brewer Brewer pp Brewer Chur od lt s Page 27 39132 062309 CAL TEMPERATURE NO SENSOR YES Brewer trol 200 CAL 200 DONE Bewer Chur a LimeAdjust OFF DONE y LP LP2 07 4 50 DONE Brewer SPRAY OZ M DONE Chur 4 CALIBRATE FLOW NO YES Brewer PROGRAMIMING LEVEL 3 Allowstechnician to calibrate after probe and or controlboardreplace ment Select YES NOTE Tank temperature must be within range 192 208 F Insertan accurate thermometer approximately 10 intotank Adjustthe number on the right with until it matches reading of thermometer Select DONE This screen allows adjustment of the lime compensation system when BrewLOGIC is turned on Range 2 50 Default 10 variation of brewed volume The remaining screens in Level 3 are just a convenient shortcut to the same ones used in previous levels Page 28 39132 032012 PROGRAMMING FUNCTIONS LEVEL 4 FLOW CHART ENTERING LEVEL 4 REVERSE FORWARD AXIOM l
41. nk at the heater connections Test Procedures 1 Disconnect the brewer from the power source 2 Disconnect the TCO from the tank heater 3 With an ohmmeter check for continuity across the TCO as shown above If continuity is not present as described replace the main harness 39132 041708 BLANKET WARMER FIG 22 1 BLANKET WARMER Location The blanket warmer is wrapped around the tank assembly Operation Theblanketwarmer provides alow consistent heat around the tank at the point of the temperature sensor This additional heat aids the heater circuit by reducing the number of on off cycles thereby extending the life of the relay contacts and the heater Test Procedures 1 Disconnect the brewer from the power source 2 With a voltmeter check voltage across the two wires at the warmer element with the ON OFF switch in the position Connect the brewer to the power source The indication must be 120 volts ac for two wire 120 volt models and three wire 120 208 and 120 240 volt models or 230 volts ac for two wire 230 volt models 3 Disconnect the brewer from the power source If voltage is present as described proceed to 74 If voltage is not present as described refer to Wiring Diagrams and check wiring harness Page 22 4 Check the resistance across
42. nse valve wire and measure the flow of current through the valve when activated The reading or specification Page 15 must be within 0 08 to 0 20 amps If voltage is present as described but no coil action is observed brew valve is defective Replace valve and test again to verify repair If voltage or current is not present as described refer to Wiring Diagrams and Triac Map for wiring harness or control board output triac issue Removal and Replacement 1 Disconnect the brewer from the power source 2 Disconnect wires from the valve 3 Drain enough water from the tank so the water level is below the outlet 4 Remove hoses from the valve 5 Remove the two 78 32 nuts securing the valve to the sprayhead panel 6 Install new valve using the two 78 32 nuts 7 Reconnect hoses to the valve and secure in place with clamps FIG 15 2 BREW VALVE Dueto the internally rectified coil do notattemptto test this type of coil with an ohmmeter The reading will be open or very high resistance depending on the polarity of your meter leads 39132 031814 OPTIONAL BREW VALVE ON SELECT MODELS FIG 16 1 OPTIONAL BREW VALVE Location The brew valve is located inside the top cover behind the front face plate Test Procedures 1 Refertothe Programing Section for Service Tools Test Outputs Brew Valve 2 Be sure brew funnel amp server are in place before activating valve Check the valve for coil acti
43. on Turn on the valve with the test mode Listen carefully in the vicinity of the brew valve for a click as the coil pulls the plunger in If no sound is heard as described proceed to 4 If the sound is heard as described there may be a blockage in the valve hose tank or sprayhead Dis connect the brewer from the power source Remove the valve and inspect for blockage and de lime all related areas 4 Connectthe voltmeter leads to the coil terminals Turn on the valve with the test mode NOTE Due to the internally rectified coil the indication will be 120VAC potential all the time Option 1 The actual a c volt reading will slightly in crease or go higher than the potential reading when you turn on or activate the brew valve Option 2 Install an amp clamp around one dispense valve wire and measure the flow of current through the valve when activated The reading or specification Page 16 must be within 0 08 to 0 20 amps If voltage is present as described but no coil action is observed brew valve is defective Replace valve and test again to verify repair If voltage or current is not present as described refer to Wiring Diagrams and Triac Map for wiring harness or control board output triac issue Removal and Replacement 1 Disconnect the brewer from the power source 2 Disconnect wires from the valve 3 Drain enough water from the tank so the water level is below the outlet 4 Remove sprayhead and hose f
44. r voltage across pins 1 amp 2 of the ten pin J1 connector black and white wires If voltage is present replace the control board If voltage is not present check wiring and voltage across terminal block black and white on 120 amp 120 240 models or black and red on A models Correct the problem and retest before proceeding with testing Page 4 39132 062309 TROUBLESHOOTING cont REFILL CIRCUIT PROBLEM 1 1 1 1 Will not refill Refill does not shut off Power Refill does not shut off Power OFF PROBABLE CAUSE 1 Power off to brewer 2 Water shut off 3 Error Message 4 0N OFF Switch If equipped 5 Lime build up on Probe s 6 Refill Valve or Control Board 1 Lime build up on probe 2 Water Level Sensing System 3 Refill valve or control board 1 Refill valve Page 5 REMEDY Press OFF ON switch on control panel to determine if power is ON Make sure water is ON Brewer has shut down due to mal function See Diagnostic Section in this manual Make sure ON OFF Switch is ON and indicator is lit Remove the Level Probe s and check for lime deposit on tip Clean and reinstall Refer to page 19 Remove Level Probe and check for lime deposits on tip Clean and reinstall Replace control board Check valve Page 19 Clean or replace valve as needed Page 19 39132 080409 TROUBLESHOOTING cont HEATING CIRCUIT PROBLEM Water does not heat to proper temp
45. rol board 3 Disconnect the wires from the tank heater termi nals 4 Checkresistance valueacrosstank heaterterminals and compare to chart If resistance is present as described reconnect the wires the tank heater is ok If resistance is not present as described replace the tank heater NOTE If any resistance is read between sheath and either terminal remove and inspect heater for cracks in the sheath HEATER 1425W 120V 3500W 240V 1850W 240V 3500W 200V 3000W 240V 2268W 240V TERMINAL TO SHEATH INFINITE OPEN RESISTANCE 10 100 oo Co 19200 20 FIG 20 1 DV HEATERS Removal and Replacement 1 Removethe top cover or top warmer housing and front access panel as previously described 2 Drain water from the tank 3 Disconnect all the hoses from the tank 4 Disconnectthe temperature probe from the top of the tank by pulling the probe from the grommet in the top of the tank lid 5 Remove both level probes from their grommets 6 Disconnect the green wire from the top of the tank 7 Disconnect the limit thermostat from the side of the tank 8 Disconnect the two white wires from the tank warmer blanket 9 Disconnect the wires from tank heater terminals 10 Remove the four 78 32 nuts securing the tank to the mounting brackets and remove the tank as sembly 11 Remove the e
46. rom the valve 5 Removethe nutsecuring the valve to the sprayhead panel 6 Install new valve using the nut from step 5 7 Reinstall sprayhead and hose to the valve and secure in place with clamps FIG 16 2 OPTIONAL BREW VALVE Due to the internally rectified coil do not attempt to est this type of coil with an ohmmeter The reading ill be open or very high resistance depending on he polarity of your meter leads 39132 031814 LEVEL PROBE SYSTEM 2 reading approximately 255 indicates water is not touching or not conductive enough to ground the circuit low reading 0 2 indicates the probe is grounded Removal and Replacement 1 Disconnectthe brewer from the power source and allow tank to cool 2 Remove nut wire and washers from probe 3 Pull probe straight up from grommet 4 Whenreinstalling ensure long probe is connected to the blue wire and short probe is connected to the brown wire NOTE Heavy mineral build up on probes could indicate that the tank lid and grommets may need to be de limed as well FIG 17 1 LEVEL PROBES Location The level probes are located inside the tank lid Operation The level probes sense the water level in the tank by the conductive minerals in the water grounding outthe very low AC voltage applied to the probes The FIG 17 2 LEVEL PROBES circuit monitors the time it takes the water to drop the distance from the short prob
47. rth Respect Earth with the stylized leaf and coffee cherry design Safety Fresh savemycoffee com Scale Pro Silver Series Single Smart Funnel Smart Hopper SmartWAVE Soft Heat SplashGard The Mark of Quality in Beverage Equipment Worldwide ThermoFresh Titan trifecta TRIFECTA sylized logo Velocity Brew Air Brew Beverage Bar Creator Beverage Profit Calculator Brew better not bitter Build A Drink BUNNSource Coffee At Its Best Cyclonic Heating System Daypart Digital Brewer Control Element Milk Texturing Fusion Nothing Brews Like a BUNN Picture Prompted Cleaning Pouring Profits Signature Series Sure Tamp Tea At Its Best The Horizontal Red Line Ultra are either trademarks or registered trademarks of Bunn O Matic Corporation The commercial trifecta brewer housing configura tion is a trademark of Bunn O Matic Corporation Page 2 39132 031314 CONTENTS Troubleshooting eo notio mote 4 Diagnostics PU 9 Technician Programming 10 AAG00991 7 Ta LIRE Suh M M Pa man aa ata 11 GORITODBOSTU nankuna 12 Face Plate pasa qnte 13 Membrane SWING ase u 18 BY GW VIVE ici iu unai n nhu am akui shun 14 Optional Brew Valve sssi anan paka asas
48. s If voltage is present proceed to 4 If voltage is not present refer to Wiring Diagrams and check main wiring harness If harness checks ok replace control board 4 Checkthe refill valve for coil action Brieflyactivate the refill valve inthe test mode and listen carefully near the refill valve for a clicking sound as the magnetic coil pulls the plunger in If the sound is heard as described and water will not pass through the refill valve there may be a blockage in the water line before the refill valve or the solenoid valve may require inspection for wear and removal of waterborne particles Page 18 If the sound is not heard as described proceed to 5 5 Disconnect the brewer from the power source 6 Check for continuity across the refill valve coil terminals If continuity is not present as described replace the refill valve If continuity is present as described there could be some debris in the valve Removal and Replacement 1 Remove both wires from the refill valve 2 Verify that the white shutoff clamp between valve and tank is squeezed shut 3 Disconnect both water lines at the valve 4 Remove the two 1 4 20 screws securing the valve to the component mounting bracket 5 Using the two 1 4 20 screws install the new valve to the component mounting bracket 6 Securely fasten the water lines to the valve 7 Refer to wiring diagrams when reconnecting the wires 8 Installaccess panels an
49. s to specification reconnect the two Page 24 wires to the warmer element If resistance is not to specification replace the warmer element Removal and Replacement Remove the three 74 40 screws securing the warmer assembly to the brewer Lift the warmer assembly from the brewer Disconnectthetwo wires from the warmer element terminals Remove the two 78 32 nuts securing the warmer element to the warmer plate Securely install new warmer element Reconnect the two wires to warmer element ter minals Securely install warmer assembly on the brewer FIG 24 2 WARMER ELEMENTS WARMER RESISTANCE 100W 120V 144 00 100W 220V 484 00 100W 200V 400 00 TERMINAL 5 INFINITE OPEN 39132 041708 VOLTAGE SELECTOR SWITCH Removal and Replacement 1 Disconnect the brewer from the power source 2 Disconnect the wires from the power switch 3 Removethe switch mounting screws from the left side of trunk 4 Install new switch in trunk with the two 6 32 x 1 4 mounting screws White to Term Block 120V Position Blue to Tank Heater Common WHI VIO to Tank Heater 120 208 240V Position FIG 25 1 VOLTAGE SELECTOR SWITCH Location The power switch is located on the component mounting bracket behind the front access panel Test Procedure 1 Disconnect the brewer from the power source 2 Disconnectthe wires fromthe selector switch With the selector switch in the 12
50. volt models If voltage is present proceed to 4 Strainer If voltage is not present refer to Wiring Diagrams and check main wiring harness If harness checks replace control board 4 Checkthe refill valve for coil action Brieflyactivate the refill valve inthe test mode and listen carefully near the refill valve for a clicking sound as the magnetic coil pulls the plunger in If the sound is heard as described and water will not pass through the refill valve there may be a blockage in the water line before the refill valve or the solenoid valve may require inspection for wear FIG 19 2 LATER REFILL VALVE and removal of waterborne particles If the sound is not heard as described proceed to Page 19 39132 061809 Flow Control Washer TANK HEATERS Location Thetankheatersarelocatedinsidethetankand secured to the tank bottom Test Procedures 1 With a voltmeter check voltage across the white wire 120V Models or red wire 120 208 240V Models from the terminal block and black wire from the control board Connect brewer to the power source The indication must be 120 volts ac for two wire 120 volt models or 208 240 volts ac for three wire 120 208 240 volt models during a heating cycle 2 Disconnect the brewer from the power source If voltage is present as described proceed to 73 If voltage is not present as described refer to the Wiring Diagrams and check wiring harness If harness checks ok replace cont
Download Pdf Manuals
Related Search