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Bunn CDS-3 User's Manual

1. F NZD NZD SNOT 009 q cS0 60 dant dvo JILVIN3HOS 2802 27646 022500 51 COOLANT SCHEMATIC DIAGRAM CDS 3 Prior to S N CDS 0019500 YOLVINNNDOV NOILONS ANIWA SSVd Ad SVO LOH HO1VHOdVAd H3LN3O 5 GION310S 5 11 1331 27646 022500 52 COOLANT SCHEMATIC DIAGRAM CDS 3 S N CDS 0019500 Up HosSaudWoo YOLVINNNDOV NOILONS HO1VHOdVAd H3LN3O 5 YASNACNOO 1331 27646 022500 53 SCHEMATIC WIRING DIAGRAM FOR CDS 2 COMPRESSOR ASSEMBLY eng K2 3 2 2 N GRN LIMIT OME BLK j BLK K2 5 WHUBLK WHI BLK 16 i imm sei Cue c RED He AMP i CONNECTORS i FOROPTIONAL DAY NIGHT TIMER DAY NIGHT SW i T2 ei WHURED IAE WHI GRN gutta RED 22 LT LAMP lt 5 ASSY BLK 22 BLK 22 4 lt ASSY BLK 22 J4 1 14 GRY 22 E E AHH sensor L BLK 22 SENSOR romxm zoo T 4 WHU GRN 22 22 WHI VIO
2. su f fn LA 6 0 it 60 60 MIN Vinyl Deflector 7 Ws 2 Remove shipping material including the compressor support eye bolts the cooling drum supports the Do Not Lift Here signs from the cooling drums and the Rinse Before Using signs from each hopper NOTE Use BOM M2550 0000 lubricant where specified lt AN 3 Squeeze some lubricant into 4 Applyathin film of lubricantto 5 Install the seal over the flange hand each cooling drum seal at the rear of each cooling drum as shown x f e Er 6 Press the seals firmly into 7 Applyathin film of lubricantto 8 Install the seals on the auger place the inside of each auger shaft shafts Wipe the cooling drums seal to remove any lubricant 6 27646 022500 INITIAL SETUP CONT Align the auger shaft with the 10 flat fin of the auger Push the augers as far as they will go and rotate them so the flat fins are pointing up AmSo3 Thoroughly rinse the hoppers and install them over the cool ing drums with augers Slide them into place and push them down as far as they will go 11 Set the lids on the hoppers Slide front to back or lift off for filling As much
3. RED 22 E WHUBLK BLK 22 WHUBLK RT LAMP 1 RED 22 ASSY BLK 22 am CT LAMP 1 RED 22 9 ASSY BLK 22 LT LAMP h RED 22 lt lt 1 RED 22 O ASSY BLK 22 BLK 22 BLK 22 SENSOR saillie GRY 22 8LU 22 T RED 22 WHI VI0 22 rO IR ICE OFF NO ICE SWITCHES 1D CENTER J4 20 1 e WHVBLK NE el BUGRN LI f mAr a 0 h N i 13 5 WHI BRN 0 amorc L i T5 WHI RED BLK 5 2 120 VOLTS AC Pie aape 2 WIRE SINGLE PHASE 60 HZ 58 27646 022500 SCHEMATIC WIRING DIAGRAM FOR CDSA 3 L2 BRN Po LK BL g FILTER WHI TAA INTERNAL RELAY BLK 4 one CONNECTION 4 COMPRESSOR ASSEMBLY COMPRESSOR BLK or WHI K2 4 WHI t LMT BLK or RED THERMOSTA BLK e Mo 5 116 WHUBRN W or VIO RED ah TEM 4 0 ie AMP mem d CONNECTORS 1 WHI GRN FOR OPTIONAL 1 DAY NIGHT SW T2 WHV RED 15 13 FC gk 1 1 IDAY NIG HT TIMER wHyBLK 4 BLK 22 4 RT LAMP 2 1 RED 22 ASSY Paucos BL
4. p S 24 20 BLK RA BK GRN lt lt lt IT 1 1 1 1 1 20 gt 22 is L C 0 mE N R J3 5 0 L LEFT SPRING CENTER SPRING RIGHT SPRING CONTACT CONTACT CONTACT 1 2 120 VOLTS AC GRN GRN GRN GRN GRN GRN 2 WIRE l 2 1 SINGLE PHASE 60 HZ 60 27646 022500
5. 7 The information this manual is no longer OPERATING amp SERVICE MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 To obtain the Illustrated Parts Catalog visit the Bunn O Matic website at www bunn com This is absolutely FREE and the quickest way to obtain the catalog Contact Bunn O Matic Corporation at 1 800 286 6070 to obtain a paper copy of the required Illustrated Parts Catalog mailed via U S Postal Service 27646 0000N 04 08 1997 Bunn O Matic Corporation www bunnomatic com INTRODUCTION This equipment dispenses granita type and cold liquid drinks on demand from separate hoppers Operating controls are accessible only to key operators CONTENTS Lim OG amp 2 REN 3 Site Preparation Electrical Requirements amp Initial 5 Operating utei 8 Using the Dispenser amp 10 Recommended Cleaning 12 E E 13 14 15 Troubleshooting aoe ae 16 SI MEM CM 21 Helrrgerant FOW ANUS uses 5 Schematic Wiring DEOS 54 WARRANTY Bunn
6. de GRY from Center Auger Motor and Center Auger Switch RIGHT AUGER MOTOR CAPACITOR WHI BLU from Right Auger Motor and Right Auger Switch P1324 FIG 4 AUGER MOTOR CAPACITOR TERMINALS 27646 022500 SERVICE cont Hopper Drum Seal Auger Shaft Bushing Cooling Drum Seal Auger Shaft Seal FIG 5 AUGER SHAFT ASSEMBLY Location The Auger Shaft Assembly is located in each of the cooling drums Removal and Replacement 1 Drain remove and clean hopper refer to the Rec ommended Daily Weekly Cleaning Section of this manual page 12 for proper cleaning procedures Discard the auger shaft seal hopper drum seal and faucet spool o rings Remove the 8 locking screws securing auger motor cover to the cooling drum mount assembly remove cover and set aside for reassembly Remove the 8 locking screw on the lower right side viewed from front of the auger motor mounting bracket securing the auger motor run capacitor Set capacitor aside with wires attached Disconnect the auger motor terminal from the terminal on the main wiring harness Remove the remaining 8 locking screws securing the auger motor mounting bracket to cooling drum mounting bracket Remove motor with mounting bracket drip tray if present split pin and torsion spring bearing as an assembly NOTE When removing or installing motor and shaft assemblies be sure the split pins are turned to a posi
7. 2 Disconnect the wires from the motor to be test ed 3 With a voltmeter check the voltage across the white brown wire for the left motor the white blue wire for the right motor or the grey wire for the center motor and the white black wire Place the appropriate auger switch in the ON position Connect the dispenser to the power supply The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power supply If voltage is present as described replace the motor If voltage is not present as described refer to the Wiring Diagram and check the dispenser wiring harness Removal and Replacement 1 Remove the two 8 locking screws securing the auger motor cover to the cooling drum mount as sembly 2 Remove the cover and set aside for reassembly 3 Remove the 78 locking screw on the lower right side of the auger motor mounting bracket securing the auger motor run capacitor Set capacitor aside with wires attached 4 Disconnect the auger motor terminal from the terminal on the main wiring harness 5 Remove the three remaining 8 locking screws securing the auger motor mounting bracket to cooling drum mounting bracket 6 Removemotor with mounting bracket drip tray split pin and torsion spring bearing as an assembly NOTE When removing or installing the motor be sure the split pin in the motor shaft is turned to a position th
8. Check for continuity across the terminal on the compressor and the left pin on the compressor If continuity is present as described the electrical part of the compressor is operating properly If continuity is not present as described replace the compressor Thermal Overload Protector 1 Check for continuity across the terminals on the thermal overload protector 3 If continuity is present as described the thermal over load protector is operating properly If continuity is not present as described replace the thermal overload protector 27646 122200 SERVICE cont COMPRESSOR amp COMPONENTS CDS 2 cont Compressor Start Capacitor 1 Check for continuity across the terminals on the compressor start capacitor If continuity is present as described the start capacitor is operating properly If continuity is not present as described replace the capacitor NOTE If all the electrical components are operating properly and the compressor does not operate there is an internal mechanical problem Replace the compressor Removal and Replacement Compressor NOTE Before removal of any refrigeration component the refrigerant in the system must be reclaimed by a licensed refrigeration repair person 1 Disconnect the tubes from the condenser and the accumulator 2 Disconnect the compressor wiring harness from the dispenser main wiring harness 3 Remove the four 25 20 keps nuts and wash
9. MD WHI BLK 110 22 YEL 22 WHU RED gt WHI BLK rz WHI RED H Torn WHI RED 7 i GRN 22 22 9 22 1 YEL 22 LIED 1 GRY 22 ooo PNK 22 PNK22 RIGHT oss E o Drow 2 i GRY 22 un BLK22 BLU 2 WHI GRN 22 22 BLK 22 WHI VIO 22 ORA 22 PNK22 I RED BLK WHI ORA_ an 14 15 WHI GRN 22 0 e E a LEFT RIGHT H Bicoro V V 9 i SWITCHES 00 Fama BLK 22 BLK 22 E wg EET 3 T LEFT SPRING RIGHT SPRING 230 VOLTS AC m m m ONE i 2 WIRE SINGLE PHASE 90 HZ 57 27646 022801 SCHEMATIC WIRING DIAGRAM FOR CDS 3 L1 N 52 2 GRN L INTERNAL RELAY i CONNECTION r COMPRESSORASSEMBLY __ COMPRESSOR K2 4 WHI i LIMIT 1 BLK or RED THERMOSTA BLK j BLK T 1 ON OFF SW RED WHI GRN WHI GRN mmm R WHI BLK h WHI BLU LAMP 0 UN n WHI GRN DAY NIGHT SW S 1 3 1 IDAY NIGHT T2 1
10. adjust ment board out as an assembly Turn switch panel over and remove the wires from the auger switch that is to be replaced Compress the clips on the back of the control panel and gently push switch through the opening Push the new switch into the opening with the o on the switch to the outside until the clips snap into position Reconnect the wires to the switch Refer to Fig 8 when reconnecting wires Position the switch panel inside the drawer and secure with four 78 32 locking screws Reinstall drawer WHI GRN from Day Night Switch and or other Auger Switches LEFT AUGER SWITCH WHI BLU to Right Auger Motor amp Right Auger Motor Capacitor CENTER AUGER SWITCH CDS 3 Only GRY to Center Auger Motor amp Center Auger Motor Capacitor RIGHT AUGER SWITCH WHI BRN to Left Auger Motor Left Auger Motor Capacitor P1336 FIG 8 AUGER SWITCH TERMINALS 27646 122200 SERVICE cont CIRCUIT BREAKER FIG 9 CIRCUIT BREAKER Location The circuit breaker is located inside the dispenser on the upper left side of the component bracket Test Procedures 1 Disconnect the dispenser from the power source 2 Remove the wires from the circuit breaker Check for continuity between the terminals Conti nuity must be present between the terminals If continuity is present as described the circuit breaker is functioning properly If continuity is not present as described press the
11. tion that will clear the torque sensor circuit board 24 Pull the auger shaft assembly straight out of cool ing drum Inspect the shaft for abnormal wear or scoring From the front of dispenser remove the seal and blue bushing from cooling drum and discard them Clean seal and busing surfaces of the cooling drum very thoroughly All old lubricant must be removed Refer to Fig 6A and slip new blue bushing into cooling drum Lightly lube of bushing with M2550 0000 Lubri film provided in Kit 28106 0000 CDS 2 or 28106 0001 CDS 3 Do not use anything such as a cotton swab that might leave lint or unravel DON NOT GET ANY LUBE ON THE SEAL COUNTERBORE SURFACE Lightly lube 1 0 of new cooling drum seal with 2550 0000 provided in kit Use care not to get any lube on O D of seal Place seal on insertion tool 28395 0000 as shown in Fig 6B Make sure open face of seal is toward cooling drum Push seal into bore until it is firmly seated remove tool Clean the auger shaft assembly then wipe a small amount of M2550 0000 Lubri film provided in kit over the first two inches of the front end of the shaft Place a small amount of 29563 0000 Krytox lubricant provided in kit in a plastic cap on the end of the motor shaft about 1 1 2 and a thin film in the groove Install auger shaft assembly onto the motor shaft See Fig 6C Do not use too much Krytox lubricant 1 1
12. 022500 SERVICE cont ICE OFF NO ICE SWITCHES FIG 35 ICE OFF NO ICE SWITCHES Location The ICE OFF NO ICE switches are located inside the dispenser drawer Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the black wire from the switch to be tested and white black from contactor located on the outside bottom of the component bracket 3 Withavoltmeter checkthe voltage across the black wire and the white black wire and all other switches in the down position ON to the center of the control panel Connect the dispenser to the power source The indication must be 5 volts dc 4 Disconnect the dispenser from the power source If voltage is present as described reconnect the white black wire to the contactor and proceed to 5 If voltage is not present as described refer to the Wiring Diagram and check the dispenser wiring harness 5 Remove the white yellow wire and the white violet wire from the right ICE OFF NO ICE switch the white orange wire and the red black from the left ICE OFF NO ICE switch orthe brown black wire and blue wire from the center ICE OFF NO ICE switch 41 6 With the switch to be tested pressed down on the right side check for continuity between the center terminal and the left terminal With the switch pressed down to the left check for continuity be tween the center terminal and the right terminal Continuity must not be present when neither
13. 1 n2 1 1 NOTE This is the only place Krytox lubricant is used 15 Assemble motor shaft assembly as shown in Fig 6C then install assembly into cooling drum Make sure the pins do not hit the sensor board and cool ing drum seal is not dislodged as the shaft passes through 16 Secure motor and capacitor to the cooling drum mounting bracket Install rear motor cover 17 Refer to nitial Setup for hopper assembly and installation procedures Be sure to use new hop per drum seal auger shaft seal and faucet spool o rings when reassembling 27646 122200 SERVICE cont AUGER SHAFT ASSEMBLY cont Lightly lube the bushing I D with M2550 0000 Lubri Film Do NOT get any Lube on this surface P1759 FIG 6A AUGER SHAFT BUSHING Open face of seal away from tool Cooling Drum Seal Seal Insertion Tool FIG 6B COOLING DRUM SEAL Lube about 1 1 2 of shaft and in the groove with 29563 0000 tox Lubricant Auger Shaft Assy Lube about 2 0 of shaft with M2550 0000 Lu bri film P1761 FIG 6C MOTOR SHAFT ASSEMBLY 27646 122200 SERVICE cont AUGER ON OFF SWITCHES FIG 7 AUGER ON OFF SWITCHES Location The auger switches are located inside the dispenser drawer Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the white green wire from the switch to b
14. Design Pressures High 210 Low 32 Recharge 230V system with 9 5 oz of Type 404A refrigerant Design Pressures High 215 Low 40 NOTE The charging of the system must be done by a licensed refrigeration repair person Compressor Start Capacitor Refer to FIG 12 WARNING The compressor start capacitor must be properly discharged before proceeding 1 Remove terminal cover retainer 6 and terminal cover 5 Set aside for reassembly 2 Disconnect the two leads from the capacitor 3 Prytheend of the capacitor mounting bracket off of the boss on the capacitor and remove the capaci tor 4 Install new capacitor on the capacitor mounting bracket 5 Refer to Fig 13 and reconnect the wires to the ca pacitor 6 Reinstall terminal cover 5 and cover retainer 6 BLK to Compressor Relay Left Terminals 120V DISPENSERS BLK to Start Relay T4 BLK to Start Relay T3 230V DISPENSERS FIG 13 COMPRESSOR START CAPACITOR TERMINALS P1340 27646 122200 SERVICE cont COMPRESSOR amp COMPONENTS CDS 2 cont Compressor Start Relay Refer to FIG 12 1 Remove the terminal cover retainer 6 and the terminal cover 5 WARNING The compressor start capacitor must be properly discharged before proceeding 2 Disconnect the wires from the compressor start relay 3 Pull relay 1 off of the compressor pins and dis card 4 Push new relay onto the compressor pins 5 Refer to Fig 1
15. ICE position press the ON OFF switch to the ON position After approximately two minutes listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 46 7 Disconnect the dispenser from the power source If the sound is heard as described and the refrigerant will not pass through the solenoid valve there may be a blockage in the refrigerant line before the solenoid valve or the solenoid valve may require inspection for wear and removal of particles If the sound is not heard as described replace the solenoids Removal and Replacement NOTE Before removal of any refrigeration component the refrigerant in the system must be reclaimed by a licensed refrigeration repair person 1 Disconnect the wires from both solenoids 2 Disconnectthe refrigerant lines from the solenoids to the cooling drums and the refrigerant line from the accumulator Remove the 6 hex crimptite securing solenoid bracket to the dispenser chassis Remove bracket and solenoids from the chassis assembly Remove the four 28 32 locking screws securing the solenoids to the bracket Remove solenoid and repair or discard Install new solenoid on mounting bracket using four 8 32 locking screws Reinstall mounting bracket and solenoids inside the dispenser chassis securing with a 6 hex crimptite screw Reconnect the tubes from the accumulator and the cooling drums Refer to Fig 45 and recon
16. If continuity is not present when lamp cord assembly is connected or continuity is present when lamp cord assembly is not connected replace the lamp cord connector Removal and Replacement 1 Disconnect the lamp cord assembly from the lamp cord connector 2 Remove the two 78 32 locking screws securing the auger motor cover the auger motor bracket cooling drum bracket Move cover back far enough to gain access to the lamp cord connector 3 Disconnect the lamp cord connector wires from the dispenser main wiring harness 4 Remove nut and washer securing the lamp cord connector to the auger motor cover and discard nut washer and lamp cord connector 5 Remove new nut and washer from new lamp cord connector 6 Push new lamp cord connector through the hole in the auger motor cover and secure with the new nut and washer 7 Reconnect the wires on the cord connector to the dispenser main wiring harness 8 Position auger motor cover on auger motor bracket cooling drum bracket and secure with two 8 32 locking screws 9 Refer to Fig 40 when reconnecting wires to Main Wiring Harness RED to Main Wiring Harness FIG 40 LAMP CORD CONNECTOR 27646 122200 SERVICE cont LAMP HOLDER SOCKET ASSEMBLY FIG 41 LAMP HOLDER SOCKET ASSEMBLY Location The lamp holder socket assemblies are located inside the hopper covers Test Procedures 1 Disconnect the lamp cord assembly from the lamp co
17. Model CDSA 2 This dispenser has an attached cordset and requires a 2 wire grounded individual branch circuit rated 230 volts ac 10 amp single phase 50 Hz The mating connector must be a NEMA 5 15R Refer to the dataplate for exact electrical requirements Model CDS 3 This dispenser has an attached cordset and requires a 2 wire grounded individual branch circuit rated 120 volts ac 20 amp single phase 60 Hz The mating connector must be a NEMA 5 20R Refer to the dataplate for exact electrical requirements Model CDSA 3 This dispenser has an attached cordset and requires a 2 wire grounded individual branch circuit rated 230 volts ac 15 amp single phase 50 Hz The mating connector must be a NEMA 5 20R Refer to the dataplate for exact electrical requirements NOTE Bunn O Matic does not recommend the use of any extension cord with these dispensers 5 27646 122200 INITIAL SETUP CAUTION The dispenser is very heavy Use care when lifting or moving it Use at least two people to lift or move the dispenser 1 Setthe dispenser on the counter where it will be used The CDS 3 dispenser requires a minimum of 6 0 air clearance on both sides and at the rear of the dispenser For optimum performance do not let warm air from surrounding machines blow on the CDS 3 and DO NOT REMOVE VINYL DEFLECTOR NOTE The dispenser should be level or slightly lower in front for proper operation
18. NO ICE SWITCH TERMINALS 27646 122200 SERVICE cont LAMP CORD ASSY 7 Strip the wires from the lamp holder socket as sembly approximately 375 8 Using the two wire nuts supplied connect the new lamp cord assembly to the lamp holder socket as sembly wires 9 Reinstall the hopper liner to the bottom of the hop per cover 10 Reinstall the hopper cover to the hopper 11 Plug in the new lamp cord assembly to the lamp cord connector assembly on left top of the auger motor cover 12 Refer to Fig 38 when reconnecting the wires BLK to Lamp Holder WHI __ BLK to Lamp Holder BLK Location The lamp cord assembly is located in the left top of the auger motor cover Test Procedures 1 Disconnect the dispenser from the power source 2 Unplug the lamp cord assembly from lamp cord connector assembly 3 Check for continuity across the tip of the cord as sembly and the housing Continuity must not be present when both lamps are removed If continuity is present as described the cord assembly is operating properly If continuity is not present as described replace the cord assembly FIG 38 LAMP CORD WIRES Removal and Replacement 1 Disconnect the lamp cord assembly from the lamp cord connector assembly in the top of the auger motor cover 2 Remove the hopper cover with the lamp cord as sembly from the hopper 3 Remove hopper cover liner from the hopper COVer 4 Cut the closed splice term
19. as possible keep lubricant from the inside of the hoppers The cleaner you keep the food zone the cleaner the product you ll serve the cus tomer x LS 5 JY 4 i APPROXIMATELY 25 Ts 25 H Xm 12 Plug in the hopper lid lamp 13 05 2 only Assemblethe drip 14 CDS 3 only Loosen the two cables tray front legs by turning coun terclockwise to gain approxi mately 25 clearance Install the slots of the support bracket over threaded studs of the legs as shownin illustration Tighten qme o the legs by turning clockwise to Cc secure the bracket in place 15 CDS 3 only Install the drip tray 7 27646 022500 OPERATING CONTROLS CDS 3 Controls Illustrated ICE CONTROLS Controls the consistency of the ice in the hoppers when the DAY NIGHT switch is in the left DAY position and the ICE OFF NO ICE switch is in the left ICE position Turn this control clockwise to produce a coarser ice or counterclockwise to produce a finer ice The dispenser is set to deliver satisfactory ice at a 1 00 setting CE This is the normal operating position Freezes nd maintains the ice in the selected hopper to the onsistency set with the ICE control s when in the left OFF Provides no cooling to the selected hop per when in the center OFF position NO ICE Maintains cooling yet allows any ice in the selected hopper
20. before proceeding 1 Disconnect the two leads on the compressor start capacitor Loosen the capacitor retaining strap and remove the capacitor Securely install new start capacitor underthe retain ing strap Refer to Fig 18 and reconnect the wires to the start capacitor Compressor Run Capacitor WARNING The compressor run capacitor must be properly discharged before proceeding 1 Disconnect the three leads from the compressor run capacitor Loosen the capacitor retaining strap and remove the capacitor Securely install new run capacitor under the retain ing strap Refer to Fig 18 and reconnect the wires to the relay 2 3 4 2 4 BLK to Compressor Relay T6 BLK to Compressor BLK to Compressor Relay T2 Relay T1 START RUN FIG 18 COMPRESSOR CAPACITOR TERMINALS P1817 Compressor Start Relay WARNING The compressor start capacitor must be properly discharged before proceeding 1 Disconnect the wires from the compressor relay 2 Remove the 76 32 screw securing the relay to the rear of the component bracket Remove and discard relay Install new relay on the rear of the component bracket and secure with a 76 32 screw Refer to Fig 19 and reconnect the wires 3 4 33 T4 WHI from Compressor and Main Harness T4 BLK from Run Capacitor _ T5 BLK from Compressor Thermal Overload Protector and Main Harness T1 BLK from Start Cap
21. between J4 pin 3 and J4 pin 23 of the control board Connect the dispenser to the power source set the main power switch to ON position set the DAY NIGHT switch to DAY position The indication must be 12 volts ac If voltage is present as described the voltage divider is operating properly If voltage is not present as described replace the volt age divider FIG 52 VOLTAGE DIVIDER 27646 122200 COOLANT SCHEMATIC DIAGRAM CDS 2 TANVd SIHL HO 3015 ALISOddO 395 NOIIVINHOJNI 39HVHO LNY1009 39IAH3S 080 X qO Sc HOssaudWoo Ba a 1081 OL N 1091400 OL HOSN3S HOLSIAH3H L YOSNAS HOLSIAHSH L HOJVHOdV 3 dI v90 X O O SEF 9394095 E SNOT 0 YOLVINNNDOV NOILLONS dan dvo vs TN 080 00 SZ 3901 9394095 H3SN3QNOO 2 HalllidS 060 X Q O ud LE dani 4 0 i f 031091402 1331 2 ATIVOIH LO3 T3 ANIVA GION3 IOS
22. is not present as described refer to the Wiring Diagram and check the dispenser wiring harness 38 Removal and Replacement Disconnect the plug from the main harness from the connector on the electronic control Remove the two 78 32 locking screws securing electronic control to the component bracket Re move and discard the electronic control Install new electronic control using two 78 32 lock ing screws Reconnect the plug from main harness to the con nector on the electronic control 27646 122200 SERVICE cont FAN Location The fan is located inside the dispenser chassis just in front of the condenser Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the yellow and white black wires from the main harness to the fan leads 3 Withavoltmeter checkthe voltage acrossthe yellow and the white black wires and the ON OFF switch in the ON position Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described replace the fan If voltage is not present as described refer to Wiring Diagram and check the dispenser wiring harness Removal and Replacement Refer to Fig 31 NOTE Leave the hopper in place This keeps it in align ment while the condenser shroud is removed 1 Disconnect the fan l
23. pin 5 Referto Fig 15 and reconnect the wire Reinstall terminal cover 5 and cover retainer BLK from Compressor Harness BLK to Compressor 120V DISPENSERS BLK from Compressor 52 55 230V DISPENSERS P1330 FIG 15 THERMAL OVERLOAD PROTECTOR TERMINALS Compressor Run Capacitor 230V Dispensers Only Refer to FIG 12 1 Remove terminal cover retainer 6 and terminal cover 5 2 Disconnect the run capacitor leads 3 Remove the 6 crimptite screw securing the run capacitor to the rear of the component bracket 4 Remove run capacitor and discard 5 Place new run capacitor on the rear of component bracket and secure with 6 crimptite screw 6 Refer to Fig 15A and reconnect the wires BLK to Start Relay T1 BLK to Start Relay T3 FIG 15 COMPRESSOR RUN CAPACITOR 9 TERMINALS 27646 122200 SERVICE cont COMPRESSOR 8 COMPONENTS CDS 3 FIG 16 COMPRESSOR amp COMPONENT LOCATIONS P1558 30 Location The compressor assy is located inside the front of the dispenser chassis FIG 17 COMPRESSOR THERMAL OVERLOAD PROTECTOR LOCATION 1 Compressor Start Relay 2 Compressor Start Capacitor 3 Compressor Run Capacitor 4 Thermal Overload Protector 5 Overload Protector Retainer 6 Compressor Terminal Cover 7 Compressor Terminal Cover Retainer Test Procedures Compressor Start Relay Refer to FIG 17 WARNING The compr
24. side of the switch is pressed down If continuity is present as described the ICE OFF NO ICE switch is operating properly If continuity is not present as described replace the ICE OFF NO ICE switch Removal and Replacement 1 Pull the dispenser drawer out until the drawer hits the drawer stop Using a screwdriver gently pry up on the drawer stop and remove the drawer from the dispenser 2 Remove the four 78 32 locking screws securing the switch panel to the drawer 3 Lift switch panel with wires and L E D adjustment board as an assembly Turn switch panel over and remove the wires from the ICE OFF NO ICE switch that is to be replaced 5 Compress the clips the back of the control panel and gently push switch through the opening Push the new switch into the opening until the clips snap into position Reconnect the wires to the switch Refer to Fig 36 when reconnecting wires Position the switch panel inside the drawer and secure with four 78 32 locking screws LEFT ICE OFF NO ICE SWITCH WHI ORN from Control Board J4 14 BLK from main harness RED BLK from Control Board J4 13 CENTER ICE OFF NO ICE SWITCH CDS 3 Only BLU from Control Board J3 9 BLK from main harness BRN BLK from Control Board J3 8 RIGHT ICE OFF NO ICE SWITCH WHI VIO from Control Board J4 16 BLK from main harness WHI YEL from Control Board J4 17 P1334 FIG 36 ICE OFF
25. the white black wire on the auger motor terminal Place the appropriate auger switch in the ON position Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described referto the Wiring Diagram and the dispenser wiring harness 5 Checkforcontinuity acrossthe auger motor capaci tor terminals If continuity is present as described reconnect the wires to the auger motor capacitor If continuity is not present as described replace the auger motor capacitor 3 23 Removal and Replacement 1 Remove the two 8 locking screws securing the auger motor cover to the cooling drum mount assy Remove the cover and set aside for reassembly Disconnect the wires from the auger motor capaci tor terminals Remove the 8 locking screw on the lower right side of the auger motor mounting bracket securing the auger motor capacitor Install a new capacitor on the lower right side of the auger mounting bracket and secure with a 78 locking screw Reconnect the wires to the capacitor terminals Refer to Fig 4 when reconnecting the wires 4 BLK From Auger Motor 1 BLK LEFT AUGER MOTOR CAPACITOR WHI BRN from Left Auger Motor and Left Auger Switch CENTER AUGER MOTOR CAPACITOR CDS 3 Only
26. with four 78 32 locking screws 7 Reconnect the plug on the transformer to the con nector on the dispenser wiring harness 8 Referto Fig 51 and reconnect the wires 9 Position component bracket in the chassis and secure with four 78 32 locking screws WHI BLK to Main Harness WHI BLK BLK to Main Harness WHI RED BLK to Main RED to Main Harness BLK Harness RED FIG 51 TRANSFORMER TERMINALS 27646 122200 SERVICE CONT VOLTAGE DIVIDER PAF Models only Location The voltage divider is located in the wiring har ness inside the chassis near the upper rear side of the component bracket Test proceedures 1 Disconnect the dispenser from the power source 2 Disconnect the four pin plug of the main harness from the four pin plug on the voltage divider 3 With a voltmeter check voltage across the white red wire pin 1 and the white black wire pin 2 at the plug on the main wiring harness Connect the dispenser to the power source set the main power switch to ON position set the DAY NIGHT switch to DAY position The indication must be a 120 volts ac for 120 volt 2 wire models b 230 volts ac for 230 volt 2 wire models 4 Disconnect the dispenser from the power source If voltage is present as described reconnect the plug and connector and proceed to step 5 If voltage is not presentas described refertothe Wiring Diagrams and check the main wiring harness 5 With a voltmeter check voltage
27. 0 27646 022500 RECOMMENDATIONS FOR YOUR DISPENSER Whether liquid concentrate or granulated powder all product must be thoroughly mixed BEFORE adding it to the hoppers e best results with granita type products use only products with an apparent brix of 12 or higher Some products may work with an apparent brix as low as 9 Your experimentation with other products will be the best guide in this area e Keep the premixed liquid product refrigerated This reduces cooling freezing time in the dispenser e Keep the hoppers topped off during peak serving periods Add premixed liquid product as it is dispensed This reduces the cooling freezing time and assures you of always having product ready to dispense e Keep the product level in the hoppers higher than the auger Air will become entrapped in the mixture result ing in a clouded foamy consistency e You may find it beneficial to turn down the ice controls to keep the ice granules from growing too large Refer to the operating controls on page 1 6 e products freeze at a lower temperature than others You may notice frost or ice on the hoppers This is normal and should not be a concern e Humidity in the air may cause sweating on the outside surfaces of the hoppers This is to be expected and should not be a concern The drip trays beneath the hoppers will capture this and cause it to flow to the lower drip tray for disposal e noises to be expected during
28. 22 J4 10 ne E RED BLK E WH ORA E uas EE E wawio 774121 BC 14 20 le vio EE E T 14 24 Uer f OPTIONAL DAY NIGHT 120 VOLTS AC TET SINGLE PHASE b i WHI RED 60 HZ BK 54 27646 022500 SCHEMATIC WIRING DIAGRAM CDSA 2 L1 GRN YEL L2 1m 0 5 0 0 0 5 3 ins BLU BLK FILTER 5 WHI COMPRESSORASSEMBLY LIMIT BLK BLK THERMOSTA 3 WHI BLK WHI BLK ue Aa a WHI BRN ON OFF SW orvo PAINT RED KE LEFT ee IA AUGER He CONNECTORS i FOROPTIONAL DAY NIGHT TIMER T2 T1 H5 13 BLK iD 2 PE 2 ig 0 RED 22 j RED 22 RED 22 3A AMP BLK 22 M D P eed RT LAMP iN 22 ASSY oRA22 ee YEL 22 BLU 22 GRY 22 PNK 22 PNK 22 tongue L BLK 22 ilef sensor i LLLBLKC22 sensor 22_ WHI GRN 22 BLK 22 WHI VIO 22 0 lt LEFT RIGHT 44 15 e 29 BLK 22 Ann 2 OPTIONAL DAY NIGHT 2
29. 30 VOLTS AC SINGLE PHASE TS 50 HZ WHI RED WHI RED BLK WHI BLK 55 27646 022500 SCHEMATIC WIRING DIAGRAM FOR CDS 2 COMPRESSOR ASSEMBLY es K2 3 K2 2 i qo GRN i LIMIT 5777 21 THERMOSTAT BLK j ES WHI BLK WHUBLK K1 811K1 6 iim K2 1 ON OFF SW LT AUGER SW VIO WHI GRN WHI GRN LEFT 1 RIGHT WHI BLK 4 WHI RED ji pe gt 4222555 jjj 255252422 GRY 22 1 R TORQUE 22 Hel TORQUE sensor LL BLK 22 SENSOR WHIGRN 22 BLK 22 WHI VIO 22 PNK 22 RED BLK UDrow e EUN TT TT LEFT RIGHT J4 15 WHUGRNS22 T amem h WHIVIO BENE 2 14 20 BRN BLK LEFT SPRING RIGHT SPRING 120 VOLTS AC PONE E a CONTA 2 WIRE SINGLE PHASE 60 2 56 27646 022500 SCHEMATIC WIRING DIAGRAM FOR CDSA 2 PAF L1 GRN YEL L2 T bun BLK FILTER p WHI COMPRESSOR ASSEMBLY a LIMIT i THERMOSTA LM BLK j H 7 3 n WHI BLK WHI BLK WHUBRN ON OFF SW LT AUGER SW or VIO NS RED p WHUBLU t DAY NIGHT WHI GRN TIMER 54321 WHI RED wHURED WHI RED p EE en BLK
30. 4 and reconnect the wires Reinstall terminal cover 5 and cover retainer rom v ompressor Harness BLK from Compressor Capacitor BLK from Compressor Capacitor 120V DISPENSERS T2 WHI BLK from Main Harness T3 BLK from Capacitors T4 BLK from Start Capacitor T1 BLK from Run Capacitor 230V DISPENSERS FIG 14 COMPRESSOR START RELAY TERMINALS Compressor Thermal Overload Protector 120V Refer to FIG 12 1 Remove terminal cover retainer 6 and terminal cover 5 2 Disconnectthe wire from thermal overload protector tothe compressor and the wire from the compressor wiring harness to the thermal overload protector 3 Remove overload protector retainer 2 and thermal overload protector 3 as an assembly 4 Removeretainer 2 from overload protector 3 and discard overload protector 5 Install retainer 2 on new overload protector 3 6 Install retainer 2 and overload protector 3 on the compressor terminal bracket 7 Referto Fig 15 and reconnect the thermal overload protector wires 8 Reinstall terminal cover 5 and cover retainer 6 30 Compressor Thermal Overload Protector 230V Refer to FIG 12 1 Remove terminal cover retainer 6 and terminal cover 5 2 Disconnectthe black wire from the thermal overload protector 3 Pullthermal overload protector off ofthe compressor pin and discard 4 Pushnew thermal overload protector onto the com pressor
31. A The DAY NIGHT Switch must be in the DAY position B Refer to Service DAY NIGHT Switch for testing procedures See page 36 A The lamp cord must be plugged into the lamp cord connector B Refer to Service Lamp Cord Assembly for testing procedures See page 42 27646 122200 TROUBLESHOOTING Hopper Display Lights not cont Auger Motor won t turn Fan not spinning With adjustment Board L E D s ON steadily for two minutes Fan spins after compressor shuts off PROBABLE CAUSE 3 Circuit Breaker 4 Lamps 5 Transformer 6 Lamp Holder Socket Assy 1 Auger ON OFF Switch es 2 Auger Motor Capacitor s 3 Auger Motor s 1 Fan Motor 1 Time Delay REMEDY A The circuit breaker must not be tripped B Referto Service Circuit Breaker for testing procedures See page 27 Remove the lamps and check for continuity across the base and tip Replace if necessary Refer to Service Transformer for testing procedures See page 49 Referto Service Lamp Holder Sock et Assembly for testing procedures See page 44 A The auger switch must be in the ON position B Refer to Service Auger ON OFF Switch es for testing procedures See page 26 Refer to Service Auger Motor Capacitor s for testing procedures See page 23 Referto Service Auger Motor s for testing procedures See page 22 Refer to Service Fan Motor for test
32. K 22 9 CT ze 1 RED 22 ASSY BLK 22 9 PNK 22 BLK 22 WHUGRN 22 ICE OFF NO ICE SWITCHES CENTER OPTIONAL DAY NIGHT T5 WHI RED BLK 230 VOLTS AC 2 WIRE SINGLE PHASE 50 HZ 59 27646 022500 SCHEMATIC WIRING DIAGRAM FOR CDS 3 N 22 GRN INTERNAL RELAY BLK i CONNECTION COMPRESSOR ASSEMBLY __ CUL Nue COMPRESSOR BLK orWHle K2 4 WHI r LIMIT J BLK or RED 1 THERMOSTA BLK WHI BLK K1 511K1 6 T WHUBRN ON OFF SW LT AUGER SW or VIO RED WHI GRN rel ENG Sw L GRY RT AUGER SW HA WHIGRN aces f DAY NIGHT WHI GRN i TIMER 5 Li DAY NIGHT SW i WHURED s WHI RED BLK guus WHU BLK N WHI BLK 1 22 7 BLK22S WHUBLK WHI RED BLK 1 WHI BLK Kjoltage RED 227 3 BLK22 WHI BLK WHI BLK wu al EE la Mute pum WHI BLK RIGHT TORQUE SENSOR BLK 22 1860 BLK at WHI GRN 22 BLK 22 i i BLK 0 22 1 p YEL 22 I eru 0 FRED 22 BLKC22 g J4 da 22 ICE OFF NO ICE SWITCHES ER D BLK CENTER 4 BLK WHUBLK
33. O Matic Corp warrants the equipment manufactured by it to be commercially free from de fects in material and workmanship existing at the time of manufacture and appearing within one year from the date of installation In addition 1 Bunn warrants electronic circuit and or control boards to be commercially free from defects in material and workmanship for three years from the date of installation 2 Bunn warrants the compressor on refrigeration equipment to be commercially free from defects in mate rial and workmanship for two years from the date of installation 3 Bunn warrants that the grinding burrs on coffee grinding equipment will grind coffee to meet original factory screen sieve analysis for three years from date of installation or for 30 000 pounds of coffee whichever comes first This warranty does not apply to any equipment component or part that was not manufactured by Bunn or that in Bunn s judgement has been affected by misuse neglect alteration improper installation or operation improper maintenance or repair damage or casualty THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY WRITTEN OR ORAL EXPRESS 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 A
34. Service Compressor Start Capacitorfortesting procedures See page 28 CDS 2 or 31 CDS 3 Refer to Service Compressor for testing procedures See page 28 CDS 2 or 31 CDS 3 Referto Troubleshooting Auger Mo tor Won t Turn on previous page Refer to Service Temperature Sen sor Assembly for testing procedures See page 47 Refer to Service Torque Sensor Circuit Board for testing procedures See page 48 27646 122200 TROUBLESHOOTING Compressor runs but will not cool With adjustment Board L E D s flashing 3 or 4 times every 4 seconds cont Product Won t Freeze Product freezes but ice granules are too fine or too large Dispenser is making unusual noises Some noises areanormaloccurance with this type of device You need to become familiar with those that are normal to determine when they have become unusual PROBABLE CAUSE 2 Air Filter or Condenser Refrigerant DAY NIGHT Switch Sugar content of product Voltage Divider 1 Ice adjustment Sugar content of product 1 Lubrication n2 Cooling Drum s REMEDY Theairfilterand condenser MUST be cleaned regularly Any dust buildup will affect cooling ability Have a qualified service person check the refrigerant charge A The DAY NIGHT Switch must be in the DAY position B Refer to Service DAY NIGHT Switch for testing procedures Se
35. Timer is used the Day Night Switch in the control drawer must be kept in the DAY position POWER INDICATOR drawer Glows to show that the POWER OFF ON Switch is in the right ON position Located on the front of the STATUS INDICATORS The electronic controls continuously diagnose the operational status of the dispenser and indicate as listed FLASHING 50 ON 50 OFF Glows while preparing for coolant to flow to the selected hopper Flashes for 10 seconds then glows steady for two minutes STEADY GLOW Glows for two minutes before coolant flows to the selected hopper then continues to glow while coolant flows The electronics also sense and indicate error conditions in the dispenser as listed ONE FLASH EVERY FOUR SECONDS Cooling is needed by the selected hopper but the auger isn t turning Try placing the AUGER switch for the selected hopper in the right position 8 27646 022500 OPERATING CONTROLS Cont TWO FLASHES EVERY FOUR SECONDS A temperature error is being sensed Call Bunn O Matic for Sup port THREE QUICK FLASHES Low auger torque is being sensed Call Bunn O Matic for Support FOUR QUICK FLASHES High auger torque is being sensed Call Bunn O Matic for Support DAY NIGHT TIMER The quartz driven timer offers 24 hour programming with 96 actuators that operate in 15 minute incre ments All actuators can be individually set to the inside or outside position The timer is located behind th
36. acitor 2 BLK from Run Capacitor T2 Red from Compressor P1820 FIG 19 COMPRESSOR RELAY TERMINALS Compressor Thermal Overload Protector Refer to FIG 17 1 Remove terminal cover retainer 7 and terminal cover 6 Remove the wire from thermal overload protector from the compressor wiring harness to the thermal overload protector Remove overload protector retainer 5 and thermal overload protector 4 as an assembly Remove retainer 5 from overload protector 4 and discard overload protector Install retainer 5 on new overload protector 2 Install retainer 5 and overload protector 4 on the compressor terminal bracket Refer to Fig 20 and reconnect the thermal overload protector wires Reinstall terminal cover 6 and cover retainer 2 BLK to Compressor Relay T5 FIG 20 THERMAL OVERLOAD PROTECTOR TERMINALS 27646 122200 SERVICE cont CONTACTOR ELECTRONIC CONTROL zi P1342 FIG 21 CONTACTOR ELECTRONIC CONTROL Location The contactor is located inside the dispenser chas sis on the lower outside of the component bracket Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect white black wire from contactor termi nal 0 terminal 2 on CDS 3 first type contactor and brown black from terminal 1 3 With a voltmeter check the voltage across the white black wire and the brown black wire and the ON OFF switch in the ON positio
37. at will clear the torque sensor circuit board 7 Install new motor with mounting bracket drip tray split pin and torsion spring bearing using three 8 locking screws onto the cooling drum bracket 8 Install the auger motor capacitor on the lower right side of the auger mounting bracket using the re maining 8 locking screw 9 Connect the auger motor terminal to the terminal on the main wiring harness 10 Refer to Fig 2 when reconnecting the wires LEFT AUGER MOTOR J1 1 BLK to Left Auger Motor Capacitor J1 2 WHI BRN to Left Auger Switch J1 3 WHI BLK to Main Harness CENTER AUGER MOTOR CDS 3 Only J1 1 BLK to Center Auger Motor Capacitor J1 2 GRY to Left Auger Switch J1 3 WHI BLK to Main Harness RIGHT AUGER MOTOR J1 1 BLK to Right Auger Motor Capacitor J1 2 WHI BLU to Left Auger Switch J1 3 WHI BLK to Main Harness e FIG 2 AUGER MOTOR TERMINALS 9 27646 022500 SERVICE CONT AUGER MOTOR CAPACITOR FIG 3 AUGER MOTOR CAPACITORS Location Theauger motor capacitors are located onthe lower right side of the auger motor mounting bracket inside the auger motor covers Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the wires from the capacitor to be tested With a voltmeter check for voltage across the white blue wire on the right capacitor the white brown wire on the left capacitor or the grey wire on the center capacitor and
38. awer and secure with four 28 32 locking Screws 27646 122200 SERVICE cont SOLENOIDS Location The solenoids are mounted on a bracket that is attached on top of the chassis on the left side Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the white black wire from the solenoid to be tested and the orange wire from the left sole noid the violet wire from the right solenoid or the white violet wire from the center solenoid With a voltmeter check the voltage across the white black wire and the other wire with the ON OFF switch in the ON position and the appropriate ICE OFF NO ICE switch in the ICE or NO ICE position Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to the Wiring Diagram and check the dispenser main wiring harness 5 Check for continuity across the solenoid valve coil terminals If continuity is present as described reconnect the wires to the solenoid If continuity is not present as described replace the solenoids 6 Check the solenoid valve for coil action Connect the dispenser to the power source With the auger motor switch in the ON position and the ON OFF ICE switch in the ICE or NO
39. bes from the condenser accu mulator also remove access valve and tube 2 Disconnect the compressor wiring harness from the dispenser main wiring harness 3 Remove the four 312 18 screws keps nuts and washers securing the compressor to the chassis Set screws nuts and washers aside for reassem bly 4 Remove the four 28 32 locking screws securing the component bracket to the dispenser chassis 5 Pull the component bracket with wires attached out of the chassis far enough to gain access to the compressor 6 Disconnect the compressor wiring harness from the compressor 7 Remove the two 78 32 screws securing the con tactor mounting bracket to the dispenser base 8 Removethe contactor mounting bracket contactor contactor cover and the compressor wiring harness as an assembly Set aside for reassembly 9 Disconnect the fan leads from the main wiring harness Remove the three 6 thread cutting screws ing the fan to the condenser shroud Remove the fan and set aside for reassembly Slide the compressor out the right side of the dispenser Remove the four grommets and sleeves from the old compressor and install them on the new compressor 1 1 1 n2 32 13 Slidenew compressor into position onthe dispenser chassis with the tube connections to the front Secure compressorto the dispenser chassis using four 312 18 screws washers and nuts Install the fa
40. ccordingly statements by such individuals whether oral or written do not constitute warranties and should not be relied upon The Buyer shall give 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 If requested by Bunn the Buyer shall ship the defective equipment prepaid to an authorized Bunn service location If Bunn determines in its sole discretion that the equipment does not conform to the warranty Bunn shall repair the equipment with no charge for parts during the warranty period and no charge for labor by a Bunn Authorized Service Representative during the warranty period If Bunn determines that repair is not feasible Bunn shall at its sole option 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 AS SPECIFIED HEREIN TO REPAIR OR AT BUNN S SOLE OPTION 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 2 27646 060401 USER NOTICES Carefully rea
41. ck nuts Reinstall lamps Strip the wires from the lamp cord assembly proximately 375 Using the two wire nuts supplied connect the lamp cord assembly to the new lamp holder socket assembly wires Reinstall the hopper liner to the bottom of the hop per cover Reinstall the hopper cover to the hopper Plug in the lamp cord assembly to the lamp cord connector assembly on left top of the auger motor COVer Refer to Fig 42 when reconnecting the wires 1 1 12 13 1 lt lt ___ WHI to Lamp Cord BLK BLK to Lamp Cord BLK P1322 FIG 42 LAMP HOLDER SOCKET ASSEMBLY WIRES 27646 122200 SERVICE cont L E D ADJUSTMENT BOARD FIG 43 L E D ADJUSTMENT BOARD Location The L E D adjustment board is located in the dis penser drawer attached to the bottom of the control panel Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the connector at the rear of the L E D adjustment board from the dispenser main wiring harness 3 Withavoltmeter checkthe voltage between pin hole 1 black wire and pin hole 8 pink wire with the ON OFF switch in the ON position Connect the dispenser to the power source The indication must be 5 volts dc 4 Disconnect the dispenser from the power source If voltage is present as described replace the L E D adjustment board If voltage is not present as described
42. cont DISPENSER ON OFF SWITCH FIG 27 ON OFF SWITCH DISPENSER 2 Location The dispenser ON OFF switch is located inside the dispenser drawer on the left front of the control panel Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the black wire from the switch and white black from contactor located on the outside bottom of the component bracket 3 Withavoltmeter check the voltage across the black and the white black Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models If voltage is present as described reconnect the white black wire to the contactor and proceed to 5 If voltage is not present as described refer to the Wiring Diagram and check the dispenser wiring harness 5 Disconnect the white green wire from the ON OFF switch 6 With the ON OFF switch in the ON down position check for continuity across the switch terminals Continuity must not be present when the switch is o OFF down position If continuity is present as described the ON OFF switch is Operating properly If continuity is not present as described replace the ON OFF switch Removal and Replacement 1 Pullthe dispenser drawer out far enough to expose the four 8 32 locking screws securing the switch panel to the drawer 2 Remove the four 78 32 locking screws 3 Lift switch pa
43. d and follow all notices on the equipment and in this manual They were written for your protec tion All notices are to be kept in good condition Replace any unreadable or damaged labels A WARNING HAZARDOUS VOLTAGE CHARGE Type 22 Amount 8 4 oz Design Pressures High 210 Low 32 DISCONNECT FROM POWER SOURCE 27444 0000 BEFORE REMOVING CAUTION 12559 0003 AWARNING DO NOT OVERLOAD CIRCUIT ALWAYS ELECTRICALLY GROUND THE CHASSIS OR ADAPTOR PLUG DO NOT DEFORM PLUG OR CORD FOLLOW NATIONAL AND LOCAL ELECTRICAL CODES Instructional video that accompanies every machine should be viewed before using KEEP COMBUSTIBLES AWAY 28720 0000 FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL BEFORE USING THIS PRODUCT 00986 0002E 5 98 1994 Bunn O Matic Corporation Replace with fuse 00986 0002 rated at 5 amps 27443 0000 27646 120601 USER NOTICES AFTER CLEANING amp BEFORE REASSEMBLY CHARG E Apply lubricant on lip of auger seal where E contact is made with cooling drum Type R22 Amount 8 4 OZ 2 Apply lubricant tside surf f conis hum eel or inpia hopper Desig n P ressures H gh 21 0 Low 32 e Apply lubricant over o rings on faucet spool before inserting into faucet housing Refer to product literature for Bunn approved lubricant 27444 0000 CDS 2 On ly CHARGE T
44. e page 36 Bunn recommends the use of prod ucts with an apparent brix of 12 or higher Refer to Service Voltage Divider for testing procedures See page 50 Turn the Ice control for the desired hopper a small amount clockwise to increase the ice granule size or counterclockwise to decrease the ice granule size Adjust the sugar content of the product Increasing the apparent brix results in finer ice granules Decreasing the apparent brix results in larger ice granules Always lubricate the dispenser as directed in this manual before reas sembling and using the dispenser Use the cooling drum support to determine that the auger shaft is still the proper distance from the hopper drip tray The cooling drum may be gently lifted to return it to the nec essary horizontal position Refer to Service Cooling Drum Alignment See page 35 27646 122200 TROUBLESHOOTING cont PROBLEM Dispenser is making unusual noises Somenoises areanormal occurance with this type of device You need to become familiar with those that are normal to determine when they have become unusual cont Product is leaking into the inside of the drum PROBABLE CAUSE 3 Fan Motor 4 Auger Motor s 1 Worn Shaft 2 Worn Seals 20 REMEDY Remove the air filter at the rear of the dispenser and listen for fan motor noise Replace the motor if exces sively noisy Place the Auger switches in the ON position and th
45. e right side panel SETTING TIME 1 Locate marker on the inner stationary dial that points to outer dial The marker is at approximately the two O clock position 2 Turn outer dial clockwise until the marker is pointing to the correct time The clock hands will turn with the outer dial indicating the same time as the marker NOTE the outer dial has AM and PM settings SETTING NIGHT TIME MODE 1 Locate the actuators positioned around the outer dial Inward position indicates day time mode and outer position indicates night time mode 6 2 Determine the desired times that night time mode is to begin and end 3 outer position Night Time Position all actuators between begin and end times in the Shown in Mode EXAMPLE Night Time Mode is 11 00 PM 7 00 AM Place the actuator at 11 00 PM to the outside position Con tinue placing actuators to the outside position counterclock wise around the dial to 7 00 AM All actuators from 7 00 AM to 11 00 PM must be in the inside position NOTE For Day Night Timer to operate the Day Night Switch in the control drawer must be kept in the DAY position P19 Shown in Day Time Mode 9 27646 022500 d THE DISPENSER FOR GRANITA TYPE PRODUCTS Slide the lid for the selected hopper to the front or back to gain access to the hopper Place the premixed liquid product the selected hopper 3 Simply press all switches to the center
46. e ICE OFF NO ICE switches inthe OFF position Listen for auger motor noise Replace the motor if excessively noisy Replace Shaft Refer to Service Au ger Shaft Assembly See page 24 Replace Cooling Drum Seal Refer to Service Auger Shaft Assembly See page 24 27646 122200 SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary Refer to Troubleshooting for assistance in determining the cause of any prob lem WARNING Inspection testing and repair of electrical equipment should be performed only by qualified service personnel The dispenser should be disconnected from the power source when servicing except when electrical tests are required and the test procedure specifically states to connect the dispenser to the power source COMPONENT ACCESS WARNING Disconnect the dispenser from the power source before the removal of any panel or the replacement of any component All components are accessible by removal of the auger motor cover lower drip tray front cover and the left and right side covers Refer to the contents listing for component location Contents Auger 1 MR ETE 22 Auger Motor 23 Auger Shaft 24 Auger ON OTF 26 Circuit Breaker ou
47. e compressor If continuity is present as described the electrical part of the compressor is operating properly If continuity is not present as described replace the compressor Thermal Overload Protector 1 Check for continuity across the terminals on the thermal overload protector If continuity is present as described the thermal over load protector is operating properly If continuity is not present as described replace the thermal overload protector Compressor Start Capacitor 1 Check for continuity across the terminals on the compressor start capacitor If continuity is present as described the start capacitor is operating properly If continuity is not present as described replace the capacitor 27646 122200 SERVICE cont COMPRESSOR amp COMPONENTS CDS 3 cont Compressor Run Capacitor 1 Check for continuity across the terminals on the compressor run capacitor If continuity is present as described the run capacitor is operating properly If continuity is not present as described replace the capacitor NOTE all the electrical components are operat ing properly and the compressor does not operate there is an internal mechanical problem Replace the compressor Removal and Replacement Compressor NOTE Before removal of any refrigeration component the refrigerant in the system must be reclaimed by a licensed refrigeration repair person 1 Disconnect the tu
48. e tested and white black wire from contactor located on the outside bottom of the component bracket Witha voltmeter checkthe voltage across the white green and the white black wires and the ON OFF switch in the ON position Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described reconnect the white black wire to the contactor and proceed to 5 If voltage is not present as described refer to the Wiring Diagram and check the dispenser wiring harness 5 Remove the white blue wire from the right auger Switch the white brown wire from the left auger switch or the grey wire from the center auger switch With the auger switch to be tested in the ON position check for continuity across the terminals Continuity must not be present when the switch is in the OFF position 6 26 continuity is present as described the auger switch is Operating properly If continuity is not present as described replace the auger switch Removal and Replacement 1 Pull the dispenser drawer out until the drawer hits the drawer stop Using a screwdriver gently pry up on the drawer stop and remove the drawer from the dispenser Remove the four 28 32 locking screws securing the switch panel to the drawer Lift the switch panel with wires and L E D
49. eads from the wiring har ness 2 Remove the four 6 crimptite screws securing the condenser shroud and fan assy 1 to the condenser and the two 8 32 locking screws securing the condenser shroud and fan assy 1 to the chassis base 3 Remove the condenser shroud and fan assy from the right side of the dispenser 4 Removethe three 6 thread cutting screws securing the fan assy to condenser shroud 7 Set condenser shroud and screws aside for reassembly 5 Remove the three 8 32 thread forming screws securing motor 5 to condenser fan shroud mount 6 Set shroud and screws aside for reassembly 39 a Install speed nut 2 on new motor assy 12 13 14 15 16 17 Remove speed nut 2 from the motor shaft Remove fan 3 Remove silencer 4 1 Condenser Shroud and Fan Assy 2 Speed Nut 3 Fan Blade 4 Silencer 5 Motor 6 Shroud Mount 7 Condenser Shroud Install silencer 4 on new motor assy Install fan 3 on new motor assy Using three 78 32 thread forming screws secure new motor assy to shroud mount 6 Using three 76 32 thread cutting screw new motor and shroud mount to the condenser shroud 7 Using two 78 32 locking screws secure condenser shroud and fan assy 1 to the chassis base Using four 28 32 crimptite screws secure the con denser shroud and fan assy 1 to the condenser Refer to Fig 32 and reconnect the leads on the new motor to the dispenser wiring harness Use cable ties to sec
50. eplacement 1 Disconnect the wires from the contactor 2 Remove the two 78 32 locking screws securing the contactor to the component bracket Remove and discard contactor 3 Installthe new contactor onthe component bracket using two 78 32 locking screws 4 Referto Fig 22 and reconnect the wires Terminal Z0 WHI BLK from Main Harness Power Cord Compressor Terminal 4 Terminal 2 Terminal 6 BLK from Main Harness Power Cord BRN BLK from Main Harness Control Board Terminal 8 BLK from Compressor Harness ALL CDS 2 CONTACTORS CDS 3 SECOND TYPE CONTACTORS Terminal 2 WHI BLK from Main Harness Terminal 1 Power Cord Compressor BRN BLK from Main Harness Control Board Terminal 6 BLK from Main Harness Power Cord BLK from Compressor Harness 05 3 FIRST TYPE CONTACTORS FIG 22 CONTACTOR TERMINALS Terminal 5 27646 122200 SERVICE cont COOLING DRUM ALIGNMENT Legs FIG 23 COOLING DRUM SHIPPING SUPPORT The A shaped Cooling Drum Shipping Supports removed during nitial Set Up should be kept and used as a tool to reset the alignment of the cooling drums should it ever be required Symptoms Squeaky Operation hopper lifts or won t seat properly hopper is pushed to one side or the other To check alignment 1 Place the A shaped support on the auger shaft with the ledge under the cooling drum 2 Liftthe cooling dr
51. ers se curing the compressor to the chassis Set nuts and washers aside for reassembly 4 Remove the four 78 32 locking screws securing the component bracket to the dispenser chassis 5 Disconnect the wires from the circuit breaker fuse holder transformer electronic control and the con tactor 6 Removecomponent bracket with circuit breaker fuse holder transformer electronic control and contactor as an assembly Set component bracket and screws aside for reassembly 7 Fromthe right side of the dispenser lift the compres sor assembly over the four studs in the chassis and remove compressor 8 Install new compressor over the four studs in the dispenser chassis with the fill valve to the left side of the dispenser 9 Secure compressor to the dispenser chassis using four 25 20 keps nuts and washers 10 Reconnect the wires to the components on the com ponent bracket and plug the main wiring harness into the electronic control NOTE When reconnecting wires refer to Fig 10 for circuit breaker Fig 34 for fuse holder Fig 51 for trans former and Fig 22 for contactor 11 Position the component bracket in the chassis and secure with four 28 32 locking screws 12 Reconnect tubes from the condenser and the ac cumulator to the compressor 13 Evacuate the system NOTE When replacing the compressor it is recom mended that the dryer also be replaced 14 Recharge 120V system with 8 4 oz of Type R22 refrigerant
52. essor capacitors must be prop erly discharged before proceeding 1 Disconnect the dispenser from the power source 2 Remove the compressor terminal cover retainer 7 and compressor terminal cover 6 P1819 31 3 Disconnect the black wire to the thermal overload protector 4 the white and black or red wires to the compressor With a voltmeter check voltage across the black wire removed from the thermal overload protector and the white wire with the ON OFF switch in the ON position DAY NIGHT switch in the DAY position and the ICE OFF NO ICE switch in the ICE posi tion Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 5 Disconnect the dispenser from the power source If voltage is present as described proceed to 76 If voltage is not present as described refer to the Wiring Diagram and check the dispenser wiring harness 6 Disconnect the two black wires from the compres sor start capacitor 7 Check for continuity across contacts 1 amp 2 of the relay If continuity is present as described the compressor start relay is operating properly If continuity is not present as described replace re lay Compressor 1 Withthecompressor startrelay 1 removed discon nect the black or red wire from the compressor 2 Check for continuity across the terminal on the compressor and the left pin on th
53. essor start capacitor must be properly discharged before proceeding Compressor Start Relay Refer to FIG 12 1 Disconnect the dispenser from the power source 2 Remove compressor terminal cover retainer 6 and compressor terminal cover 5 3 Disconnect the black wire from the thermal over load protector 3 and white black wire from the compressor start relay 1 4 With a voltmeter check voltage across the black wire and the white black wire and the ON OFF switch in the ON position DAY NIGHT switch in the DAY position and the ICE OFF NO ICE switch in the ICE position Connect the dispenser to the power source The indication must be 120 volts ac for two wire 120 volt models or 230 volts ac for two wire 230 volt models 5 Disconnect the dispenser from the power source If voltage is present as described proceed to 6 If voltage is not present as described refer to the Wiring Diagram and check the dispenser wiring harness 6 Disconnect the two black wires from the compres sor start capacitor 7 Remove relay from the compressor 8 Check for continuity across the upper left terminal and the right pin socket on the rear of the relay If continuity is present as described the compressor start relay is operating properly If continuity is not present as described replace re lay Compressor 1 With the compressor start relay 1 removed dis connect the black wire from the compressor 2
54. et aside for reassembly 2 Disconnect the plug on the temperature sensor leads from the connector on the dispenser main wiring harness 3 Pull the temperature sensor from the tube at the top rear of the cooling drum and discard 4 Push new temperature sensor into the tube at the top rear of the cooling drum as far as it will go 5 Refer to Fig 47 and reconnect the wires 6 Position auger motor cover cooling drum mount and secure with two 28 32 locking screws 1 BLK to Main Harness BLK LEFT TEMPERATURE SENSOR 2 WHI GRN to Control Board 14 15 CENTER TEMPERATURE SENSOR CDS 3 Only 2 WHI BRN to Control Board 3 5 RIGHT TEMPERATURE SENSOR 2 WHI VIO to Control Board J4 18 2 1325 FIG 47 TEMPERATURE SENSOR 27646 122200 SERVICE cont TORQUE SENSOR CIRCUIT BOARD 1 N sse ag safi i 1 uod 8 TORQUE SENSOR CIRCUIT BOARD FIG 4 Location The torque sensor circuit board is located on the rear of the cooling drum mount just left of center Test Procedures 1 With the ON OFF switch and Auger switch in the ON position and the ICE OFF NO ICE switch in the ICE position check the L E D on the control panel 2 TheL E D forthe torque sensor is located between the appropriate auger switch and the ice switch 3 the L E D flashes one time every four seconds the auger is not turning If the L E D flashes three times every four seconds the tor
55. f the dis pense handle and pull it off to remove the faucet pieces 6 Roll the O rings off ofthe faucet 9 spool Pull the auger from the cool ing drum Remove the auger shaft seal from the front of the cooling drum and the cooling drum seal from the rear of the drum Push the metal pin out through the faucet Unscrew the plastic cap and push the faucet spool and spring out the bottom Remove the black plug from the faucet spool for cleaning Do not use tools to remove this 12 10 AD EN iiiki of i pi 7 4 Disassemble the auger for cleaning by spreading apart the latches and removing each piece Squeeze the O rings to free them from the grooves in the faucet spool EU 4 Pull dU then out on the air filter at the rear of the dis penser 27646 022500 RECOMMENDED WEEKLY CLEANING 11 Wash all components with a wash cloth in mild hot water and detergent solution Do not immerse hopper lids 12 Wash the drums hopper drip trays top covers and outer enclosure using a clean wash cloth that has been dampened in a mild solution of detergent and hot water 13 Thoroughly rinse all surfaces with a clean wash cloth that has been dampened with hot water Wipe dry with a clean dry wash cloth before reassembling the dispenser 14 Remove the lower drip tray assembly Wash and thoroughly rinse all pieces before reinstallation NOTE Although most
56. i est IMMUNE LM LEAL UE 27 Compressor M 28 Compressor Compressor Start Capacitor Compressor Start Relay Thermal Overload Protector domitis c C 31 Compressor Compressor Start Capacitor Compressor Start Relay Thermal Overload Protector 34 Drum 35 EE 36 37 ircre uea e 38 MEME 39 Fuseand Fuse 40 ICE OFF NO ICE Switch 41 Lamp NGS GTN NEY aera A RR 42 Lamp Cord CONNEC CTO 43 Lamp Holder Socket Assembly 44 L E D Adjustment BONG 45 46 Temperature Sensor Assembly meis 47 TORQUE Sensor 48 occu LE CMM DEN EM EMIL 49 DING NETT 50 Coolant Schematics 51 Electrical SC NOTRE GS aoa 54 21 27646 122200 SERVICE CONT AUGER MOTORS FIG 1 AUGER MOTORS Location The auger motors are located at the upper rear of the dispenser chassis inside the auger motor covers Test Procedures 1 Disconnect the dispenser from the power source
57. inals connecting lamp cord assembly to the lamp holder socket assembly off 5 Remove lamp cord assembly from hopper cover and discard 6 Push new lamp cord wires through the holes on the left outside top of the hopper cover 42 27646 122200 SERVICE cont LAMP CORD CONNECTOR Location The lamp cord connectors are located inside the upper left side of the auger covers Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnectthe plug onthe dispenser main harness from the connector from the lamp cord connec tor 3 With a voltmeter check the voltage across the two pin holes on the main harness plug and DAY NIGHT switch in the down position and the ON OFF switch in the ON position Connect the dispenser to the power source The indication must be ap proximately 12 6 volts dc 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 75 If voltage is not present as described refer to the Wiring Diagram and check the dispenser main wiring harness NOTE Lamp cord assembly Fig 37 and lamps must be tested and determined to be functioning properly before proceeding to step 5 5 Check for continuity across the black wire pin and red wire pin of the lamp cord connector Fig 40 Continuity must be present when the lamp cord assembly is connected and must not be present when lamp cord assembly is disconnected from lamp cord connector
58. ing procedures See page 39 The fan motor will run for approxi mately two minutes after compressor shuts off 27646 122200 TROUBLESHOOTING cont PROBLEM Compressor not running With Adjustment Board L E D s ON steadily for two minutes Compressor runs but will not cool With adjustment Board L E D s flashing once every 4 seconds Compressor runs but will not cool With adjustment Board L E D s flashing twice every 4 seconds Compressor runs but will not cool With adjustment Board L E D s flashing 3 or 4 times every 4 seconds PROBABLE CAUSE 1 Power cord 2 Fuse Contactor A Electronic Control Compressor Start Relay Oo Thermal Overload Protector N Compressor Start Capacitor Compressor Auger not turning Temperature Sensor Assembly Torque Sensor Circuit Board REMEDY The dispenser must not be connected with an extension cord Refer to Electrical Requirements Refer to Service Fuse and Fuse Holder for testing procedures See page 40 Refer to Service Contactor for test ing procedures See page 34 Refer to Service Electronic Control for testing procedures See page 38 Refer to Service Compressor Start Relay for testing procedures See page 28 CDS 2 or 31 CDS 3 Referto Service Compressor Ther mal Overload Protector for testing procedures See page 28 CDS 2 or 31 CDS 3 Refer to
59. n Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to the Wiring Diagram and check the dispenser wiring har ness 5 Check for continuity across contactor terminals 0 amp 1 1 amp 2 CDS 3 first type contactor If continuity is present as described reconnect the white black wire and the brown black wire to the contactor and proceed to 6 If continuity is not present as described replace the contactor 6 Disconnect the black wires from contactor termi nals 6 amp 8 5 amp 6 CDS 3 first type contac tor 7 With ON OFF switch in the ON position connect the dispenser to the power source and check for continuity across terminals on contactor If continuity is not present as described on CDS 3 first type contactors replace contactor If continuity is not present between terminals Z6 amp 78 as described on all CDS 2 contactors and CDS 3 second type contactors check for continuity across terminals 2 and 4 If continuity is present as described disconnect the dispenser from power source and reconnect black wires to terminals 2 and 74 the contactor will oper ate properly If continuity is not present as described replace the contactor Removal and R
60. n on the condenser shroud and secure with three 6 thread cutting screws Reconnect the leads on the fan to the main har ness On dispensers serial number CDS0019500 up install the contactor bracket contactor contactor cover and compressor wiring harness as an as sembly Secure contactor bracket to the chassis using two 78 32 screws Refer to Fig 17A and reconnect the wires to the compressor 19 Position the component bracket in the chassis and secure with four 28 32 locking screws 20 Reconnect tubes from the condenser and the accumulator to the compressor also reconnect access valve and tube 21 Evacuate the system NOTE When replacing the compressor it is recom mended that the dryer also be replaced 22 Dispensers prior to serial number 050019500 recharge system with 25 oz of Type R404A re frigerant Design Pressures High 320 Low 44 Dispensers serial number CDS0019500 up re charge system with 22 oz of type R404A refrigerant Design Pressures High 380 Low 52 14 1 1 18 NOTE The charging of the system must be done by licensed refrigeration repair person _ RED from Relay T4 BLK from RM Relay T2 Relay T 5 WHI from FIG 17A COMPRESSOR TERMINALS 27646 122200 SERVICE cont COMPRESSOR amp COMPONENTS CDS 3 cont Compressor Start Capacitor WARNING The compressor start capacitor must be properly discharged
61. nect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to the Wiring Diagram and check the dispenser main wiring harness 5 Reconnectthe plug from the transformer to the con nector from the dispenser main wiring harness 6 Connect the dispenser to the power source 7 Disconnect the lamp cord from the lamp cord con nector 8 With a voltmeter check the voltage across the in side of lamp cord socket and the outside with the DAY NIGHT switch in the down position The indication must be approximately 12 6 volts dc 9 Disconnect the dispenser from the power source If voltage is present as described the transformer is operating properly If voltage is not present as described replace the transformer Removal and Replacement 1 Remove the four 78 32 locking screws securing the component bracket to the chassis 2 Pullcomponentbracketfromthe chassis far enough to gain access to the transformer 3 Disconnectthe connector from the dispenser main wiring harness from the plug on the transformer 4 Remove the four 28 32 locking screws securing the transformer to the component bracket 5 Remove transformer and discard 6 Positionnewtransformer on the component bracket and secure
62. nect the wires Evacuate the system Recharge the system with the appropriate coolant and to the pressures directed on the decals NOTE The charging of the system must be done by a licensed refrigeration repair person WHI BLK from Main Harness LEFT COOLANT SOLENOID ORA from Control Board J4 22 CENTER COOLANT SOLENOID CDS 3 Only WHI VIO from Control Board J3 7 RIGHT COOLANT SOLENOID VIO from Control Board J4 21 FIG 45 SOLENOID TERMINALS BIST 27646 122200 SERVICE cont TEMPERATURE SENSOR 1 M 7 peti gt FIG 46 TEMPERATURE SENSO Location The temperature sensors are located inside the top rear of the cooling drum under the auger motor covers Test Procedures 1 Position the DAY NIGHT switch in the NIGHT position check the L E D on the control panel for flashes 2 The L E D for the temperature sensor is located between the appropriate auger switch and the ice switch f the temperature in the cooling drum is less than 20 6 C or more than 120 F 73 C for 10 seconds the L E D will flash twice every four seconds 4 f flashing is present as described replace the temperature sensor NOTE Auger motor cover must be in place to give a correct reading Removal and Replacement 1 Remove the two 78 32 securing the auger motor cover to cooling drum mount and remove the cover S
63. nel with wires and L E D adjustment board as an assembly 4 Turn switch panel over and remove the wires from the dispenser ON OFF switch 5 Compress the clips on the back of the control panel and gently push switch through the opening 6 Push the new switch into the opening with the o on the switch to the outside until the clips snap into position 7 Reconnect the wires to the switch Refer to Fig 28 when reconnecting wires 8 Position the switch panel inside the drawer and secure with four 8 32 locking screws WHI GRN from Day Night Switch BLK from Main Harness Power Cord FIG 28 DISPENSER ON OFF SWITCH TERMINALS 27646 122200 SERVICE cont ELECTRONIC CONTROL FIG 29 ELECTRONIC CONTROL Location The electronic control is located on the outside of the component bracket inside the chassis on the right side Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the plug from the main harness from the connector on the electronic control 3 Withavoltmeter checkthe voltage across the socket 23 and socket 24 in the plug from the main har ness and ON OFF switch in the ON position Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described replace the electronic control If voltage
64. normal operation of the dispenser By becoming familiar with the noises made during normal operation you will be better able to listen for problems 11 27646 022500 RECOMMENDED DAILY CLEANING SUGAR 8 ALCOHOL PRODUCTS NOTE Close the control drawer before proceeding un Roco No c3 Empty all product from the hoppers The driptray should be cleaned as needed for proper presentation of the product Mix a packet of Kay 5 Sanitizer diluted with two gallons of warm 120 F water for each hopper Open the lids and add the solution Allow the solution to work for about five minutes with the dispenser on the NIGHT position Drain the sanitizing solution from the hoppers and completely rinse each with clean water Wash the underside of hopper covers or powder autofill dispensers with hot water and a mild detergent solution Rinse all surfaces and apply some commercial sanitizing agent Do not immerse hopper lids NOTE The hoppers and augers should be removed and disassembled for cleaning at least once a week using the procedure below RECOMMENDED WEEKLY CLEANING SUGAR amp ALCOHOL BASED PRODUCTS RECOMMENDED DAILY CLEANING DAIRY PRODUCTS NOTE Close the control drawer before proceeding Empty all product from the hoppers Disconnect the hopper lid cords and remove the lids 1 the hopper up slightly then 3 use a hard plastic utensil to pry it up Pull forward to remove Spread the sides o
65. ns after exhausting the troubleshooting steps contact the Bunn O Matic Technical Service Department Inspection testing and repair of electrical equipment should be performed only by qualified service person nel e electronic components have 120 volt ac and or 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 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 e Keep away from combustibles WARNING Exercise extreme caution when servicing electrical equipment e Unplug the dispenser when servicing except when electrical tests are specified Follow recommended service procedures Replace all protective shields or safety notices PROBLEM Doesn t work Switches do nothing auger not turning no hopper lid lights no fan no compressor sound Hopper Lid Lights not on PROBABLE CAUSE 1 No power or incorrect voltage to the dispenser 2 ON OFF Switch 1 DAY NIGHT Switch 2 Lamp Cord Assembly REMEDY A Check for proper voltage at the wall outlet B Check circuit breakers or fuses A The ON OFF Switch must be in the ON position B Refer to Service Dispenser ON OFF Switch for testing procedures See page 37
66. of the control drawer for granita products a Place the POWER OFF ON switch in the right ON position E b Place the auger switch for the selected hopper in the right position 9 2 c Place the DAY NIGHT switch the left DAY position Ii Lows d Place the ICE OFF NO ICE switch in the left ICE position 4 Wait for the liquid to freeze to the desired consistency HINTS Bunn O Matic recommends that the product in the dispenser be thawed each day usually MAH The ice granules get too large and a consistent product is difficult to maintain if left frozen for an extended period of time Place the DAY NIGHT switch in the right NIGHT position for a few hours each night Then return it to the left DAY position when the product has thawed sufficiently You ll know it is in the night position because the hopper lid lights are out dien THE DISPENSER FOR COLD LIQUID PRODUCTS Slide the lid for the selected hopper to the front or back to gain access to the hopper Place the premixed liquid product the selected hopper 3 Simply place all switches to the center of the control drawer except the ICE OFF NO ICE switch a Place the POWER OFF ON switch in the right position b Place the auger switch for the selected hopper in the right position c Place the DAY NIGHT switch in the left DAY position d Place the ICE OFF NO ICE switch in the right NO ICE position 4 Wait for the liquid to cool 1
67. parts are dishwasher safe they may be affected by some commercial sanitizing agents Do not place the hopper nor hopper lids in a dishwasher LUBRICATION NOTE Use BOM M2550 0000 lubricant where specified 1 Squeeze some lubricant into 2 hand fs 8 k 4 Press the seals firmly into 9 place flat fin of the augers Push the augers as far as they will go and rotate them so the flat fins are pointing up Apply a thin film of lubricant to each cooling drum seal ks lt lt 32 Apply a thin film of lubricant to the inside of each auger shaft seal 4 Thoroughly rinse the hoppers and install them over the cool ing drums with augers Slide them into place and push them down as far as they will go As much as possible keep lubricant from the inside of the hoppers The cleaner you keep the food zone the cleaner the product you ll serve the cus tomer 13 Install the seals over the flange atthe rear of the cooling drums as shown 0 Install the seals on the auger shafts Wipe the cooling drums to remove any excess lubri cant FI i Ses E ee 4 Set the lids on the hoppers 27646 022500 LUBRICATION cont A 99 10 Reinstall the black plugintothe 11 Applyathin film of lubricantto 12 Slide the O rings onto the faucet spool Do not lubricate each faucet spool O ring spools the
68. plug 4 tw 2 Cc S I 1 4 13 Reinstall the plastic caps 14 Plug the hopper lid lamp 15 Assemble the drip tray springs spools and metal cables pins Spread the dispense handles and reinstall them NOTE When reinstalling the faucet NOTE The faucet spool plugs faucet O rings cooling drum hopper seals caps they MUST be twisted as and auger shaft seals are to be replaced whenever they appear worn far as they will go Past the or damaged Bunn O Matic recommends their replacement at least point where it clicks every six months Refer to page 24 for replacement instructions FAUCET HANDLES Dispensing from the hoppers will occur when the faucet handles are installed with the handles in the upright position shown left hopper Dispensing from the hoppers will not occur when the handles are in stalled upside down shown right hopper You may consider this handle position when the product in the hoppers is not yet ready to serve Just spread the handles or disassemble them as shown and install them upside down DISASSEMBLY 1 Unscrew the balls from the handle assemblies Turn them in a counter clockwise direction until they are no longer attached to the handles 2 Remove the metal sleeves from the assemblies 3 Separate the two halves of the handles and remove them from the faucet bodies ASSEMBLY 1 Place the two halves of the handles on the fauce
69. que is less than possible If the L E D flashes four times every four seconds the torque is greater than possible 4 Ifthe L E D flashes three times every four seconds four times every four seconds or one time every four seconds with the auger turning replace the torque sensor circuit board Removal and Replacement 1 Remove the two 8 32 locking screws securing the auger motor cover to the cooling drum mount 2 Remove the cover and set aside for reassembly 3 Remove the 8 locking screw on the lower right side of the auger motor mounting bracket securing the auger motor run capacitor Set capacitor aside with wires attached 4 Disconnecttheauger motor plug from the connector on the main wiring harness 5 Remove the three remaining 8 locking screws securing the auger motor mounting bracket to cooling drum mounting bracket 48 6 Remove motor with mounting bracket drip tray split pin and torsion spring bearings as an assembly and set aside for reassembly NOTE When removing or installing the motor be sure the split pin in the motor shaft is turned to a position that will clear the torque sensor circuit board f 11 12 13 14 15 16 Disconnectthe plug fromthe dispenser main wiring harness to the torque sensor circuit board Removethe 78 32 locking screw and washer secur ing torque sensor circuit board to the cooling drum mount Remove torque sensor circuit board and discard In
70. rd connector Remove the lamps from the lamp holder socket assembly With a voltmeter check the voltage across the pin sockets in the plugs with the DAY NIGHT switch in the down position and ON OFF switch in the ON position Reconnectthe lamp cord to the lamp cord connector The indication must be approximately 12 6 volts dc Disconnect the lamp cord from the lamp cord con nector If voltage is present as described the lamp holder socket assembly is operating properly If voltage is not present as described replace the lamp holder socket assembly 5 Check for continuity across the terminals on the lamps If continuity is present as described the lamps are operating properly If continuity is not present as described replace the lamp 2 3 4 44 Removal and Replacement 1 Disconnect the lamp cord assembly from the lamp cord connector assembly in the top of the auger motor cover Remove the hopper cover with the lamp cord as sembly from the hopper Remove hopper cover liner from the hopper COVer Cutofftheclosed end splices connecting lamp cord assembly to the lamp holder socket assembly Remove the two lamps Remove the two 72 56 screws and elastic lock nuts securing the lamp holder socket assembly to the mounting bracket Remove lamp holder socket assembly and discard Install newlamp holder socket assembly on mount ing bracket using two 22 56 screws and elastic lo
71. refer to the Wiring Diagram and check the dispenser wiring harness Removal and Replacement 1 Pullthe dispenser drawer out far enough to expose the four 8 32 locking screws securing the switch panel to the drawer 2 Remove the four 78 32 locking screws co Po Lift switch panel with wires and L E D adjust ment board as an assembly and turn over Disconnect the connector on the dispenser wiring harness from the pin connector on the rear of the L E D adjustment board Remove the 4 keps nut from the right rear stud on the control panel and remove the green ground wire Remove the remaining five Z4 keps nuts from the studs on the control panel Remove the 6 stainless steel washer and the 6 nylon washer from the front stud on the control panel Remove board and discard Position a new board on the studs and spacers Install the 6 nylon washer and the 6 stainless steel washer on the front stud of the control panel Be sure the nylon washer is installed first Secure the new board to the control panel using five 4 keps nuts Connect the green lead from the dispenser main harness to the right rear stud of the control panel and secure with a 4 keps nut Reconnect the connector from the dispenser main wiring harness to the pin connector at the rear of new L E D adjustment board Turn board and panel over and position in the dis penser dr
72. refer to the Wiring Diagram and check the dispenser wiring harness 5 Remove the white red wire from the transformer 6 With the DAY NIGHT switch in the DAY position check for continuity across the terminals Continu ity must not be present when the switch is in the NIGHT position If continuity is present as described the day night switch is operating properly If continuity is not present as described replace the day night switch Removal and Replacement Pull the dispenser drawer out until the drawer hits the drawer stop Using a screwdriver gently pry up on the drawer stop and remove the drawer from the dispenser 2 Remove the four 78 32 locking screws securing the switch panel to the drawer 3 Liftswitch panel with wires and L E D board as an assembly 4 Turn switch panel over and remove the wires from the DAY NIGHT switch 5 Compress the clips on the back of the control panel and gently push switch through the opening 6 Push the new switch into the opening with the on the switch to the outside until the clips snap into position 7 Reconnectthe wires to the switch Refer to Fig 26 when reconnecting wires 8 Position the switch panel inside the drawer and secure with four 28 32 locking screws 9 Reinstall drawer WHI GRN from ON OFF Switch and Auger Switches WHI RED from Day Night Timer Harness P1335 FIG 26 DAY NIGHT SWITCH TERMINALS 27646 122200 SERVICE
73. reset button and repeat step 3 if continuity is not present as described replace the circuit breaker Removal and Replacement 1 Remove the four 78 32 locking screws securing the component bracket to the chassis 2 Tip the top of the component bracket forward far enough to allow access to the rear of the circuit breaker Remove the wires from the circuit breaker 4 Compress the clips on the back side of the com ponent bracket and gently push the circuit breaker through the opening in the component bracket Push the new circuit breaker into the opening in the component bracket until the clips snap into position Reconnect the wires to the circuit breaker Position the component bracket in chassis and secure with four 8 32 locking screws Refer to Fig 10 when reconnecting the wires RED from Transformer RED from Main Harness FIG 10 CIRCUIT BREAKER TERMINALS 27646 122200 SERVICE COMPRESSOR amp COMPONENTS CDS 2 FIG 11 COMPRESSOR ASSY Location The compressor assy is located inside the front of the dispenser chassis 230 COMPRESSORS P1344 FIG 12 COMPRESSOR ELECTRICAL COMPONENTS 1 Compressor Start Relay 2 Overload Protector Retainer 3 Thermal Overload Protector 4 Compressor Start Capacitor 5 Compressor Terminal Cover 6 Compressor Terminal Cover Retainer 7 Compressor Run Capacitor 28 Test Procedures WARNING The compr
74. stall new torque sensor circuit board in the slot in the rear of the cooling drum mount and secure with a 78 32 locking screw and washer Refer to Fig 49 and reconnect the wires Reinstall motor with mounting bracket drip tray split pin and torsion spring bearings using three 8 locking screws onto the cooling drum bracket Install the auger motor capacitor on the lower right side of the auger mounting bracket using the remaining 8 locking screw Connect the auger motor terminal to the terminal on the main wiring harness Refer to Fig 49 when reconnecting the wires Position the auger motor cover on the cooling drum mount and secure with two 28 32 locking screws J1 3 BLK from Main Harness J1 2 PNK from Main Harness LEFT TORQUE SENSOR 1 1 BLU from main Harness CENTER TORQUE SENSOR CDS 3 Only 1 1 ORA from main Harness RIGHT TORQUE SENSOR 1 1 GRY from main Harness FIG 49 TORQUE SENSOR CIRCUIT BOARD TERMINALS 27646 122200 SERVICE cont TRANSFORMER FIG 50 TRANSFORMER Location The transformer is located inside the chassis on the upper rear side of the component bracket Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the plug from the transformer to the connector from the dispenser main wiring har ness 3 With a voltmeter check the voltage across the white red wire and the white black wire in the dis penser main wiring harness connector Con
75. t bodies Check that the faucet dowel pins are in place all the way through the faucet bodies The dowel pins must be captured by the keyholes in the handle halves 2 Place the metal sleeves over the threads and install the balls by turning them in a clockwise direction 14 27646 122200 AUGER ASSEMBLY amp DISASSEMBLY EARLY AUGERS ONLY The augers may look intimidating at first glance But there are really just a few pieces snapped together Please familiarize yourself with this procedure It ll make cleaning and routine maintenance easier The augers should be taken apart for cleaning and then reassembled for use Short Auger Latch ASSEMBLY 1 Snapone ofthe auger sections to the long auger latch Snap the auger nose onto the last section installed 2 Snap another auger section in place With the long auger latch on top place the short auger latch inside the augers and snap it onto the assembly 3 Snap the third auger section in place DISASSEMBLY 1 Firmly pull the auger section connections apart at each slot thelong auge ba A os 2 Firmly pull the connection between the auger section and auger nose apart 3 Separate the slots the short auger latch as you remove the auger section Nw 15 27646 022500 TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered If the problem remai
76. to naturally thaw when in the right NO ICE position AUGER SWITCHES This is the normal operating posi tion Energizes the auger motor when in the right position The dispenser will cool to the ice consistency or liquid temperature presets only with the switch in the right position 0 Removes power from the auger mo tor when in the left position DAY NIGHT SWITCH AY This is the normal operating position he hoppers display lights will glow and the electronic controls will maintain ice when the switch is in the left DAY position the indi vidual hoppers ICE OFF NO ICE switches are in the left ICE position and the individual hoppers AUGER switches are in the right position NIGHT Use this position at night The hop pers display lights will be out yet the liquid will be kept cold in all hoppers when this switch is in the right NIGHT position and the AUGER switches are in the right position POWER OFF ON SWITCH ON This is the normal operating position The dis penser is electrically energized when the switch is in the right ON position NOTE The compressor will start after a 3 minute 20 second delay and a 6 minute 30 second delay on th CDS 3 OFF electrical components of the dispenser are without power when the switch is in the left OFF position NOTE When Day Night
77. um while rotating the supportinto a vertical position The boss on the very bottom will drop into the hopper drip tray s drain hole FIG 24 CHECKING ALIGNMENT When in its proper position the cooling drum will cause a slight pressure on the hopper drip tray drain hole and the two legs will be equidistant from the hopper drip tray If adjustment is needed remove the support and gently force the free end of the evaporator in the direction the adjustment is needed Reinstall the support check the alignment and read just the cooling drums as required 27646 122200 SERVICE cont DAY NIGHT SWITCH FIG 25 DAY NIGHT SWITCH Location The DAY NIGHT switch is located inside the dis penser drawer on the right front of the control panel Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the white green wire from the switch and the white black wire from contactor located on the outside bottom of the component bracket 3 With a voltmeter check the voltage across the white green and the white black and the ON OFF switch in the ON position Connect the dispenser to the power source The indication must be a 120 volts ac for 120 volt models b 230 volts ac for 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described reconnect the white black wire to the contactor and proceed to 75 If voltage is not present as described
78. ure wires away from fan blades L BLK to Main Harness WHI BLK BLK to Main Harness YEL FIG 32 FAN MOTOR TERMINALS P1326 27646 122200 SERVICE cont FUSE AND FUSE HOLDER Fuse Holder 1 Disconnect the wires from the rear of the fuse holder 2 Remove nut securing the fuse holder to the com ponent bracket Push fuse holder through the hole in the component bracket 4 Install new fuse holder and fuse through the hole in the component bracket 5 Secure the fuse holder to the component bracket 6 Referto Fig 34 and reconnect the wires WHI GRN from Main Harness ON OFF Switch FIG 33 FUSE HOLDER Location The fuse holder is located inside the dispenser on the upper left side of the component bracket just below the circuit breaker Test Procedures 1 Disconnect the dispenser from the power source 2 Remove cap and fuse from fuse holder 3 Remove fuse from the cap 4 Check for continuity through the fuse If continuity is present as described reinstall the fuse the fuse is operating properly If continuity is not present as described replace fuse WHI GRN from Main Harness Control Board FIG 34 FUSE HOLDER TERMINALS Removal and Replacement Fuse 1 Remove the cap from the fuse holder 2 Remove fuse from the fuse holder inspect if blown discard Install new 5 amp fuse in the fuse holder 4 Reinstall fuse holder cap 40 27646
79. ype R404A Amount 9 5 oz 269 gm Design Pressures High 215 psi 15 bar 1 48 MPa Low 40 psi 3 bar 0 28 MPa 29373 00000 CDSA 2 Only LUBRICATION CHARGE 27664 0000D 5 97 1996 BUNN O MATIC CORPORATION _ R404A Amount 25 OZ 27664 0000 Design Pressures High 320 Low 44 28519 0000 CDS 3 Prior to S N CDS0019500 CHARGE Type R404A Amount 22 oz Design Pressures High 380 Low 52 29424 0000 CDS 3 S N CDS0019500 UP 4 27646 022500 SITE PREPARATION These dispensers are very heavy Place them on a sturdy counter or shelf capable of supporting at least 180 lbs for the CDS2 and 250 Ibs for the CDS3 They are for indoor use only The dispenser must have at least four inches of space behind it This space is needed for airflow air filter removal and cleaning Minimal clearance is required between the dispenser sides and the wall or another appli ance The dispenser performs better if not placed near any heating appliance Leave some space so the dispenser can be moved for cleaning ELECTRICAL REQUIREMENTS CAUTION Improper electrical installation will damage components An electrician must provide electrical service as specified below Model CDS 2 This dispenser has an attached cordset and requires a 2 wire grounded individual branch circuit rated 120 volts ac 15 amp single phase 60 Hz The mating connector must be a NEMA 5 15R Refer to the dataplate for exact electrical requirements

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