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CONTENTS Introduction .............................................................................. 2 Warranty ................................................................................... 2 User Notices.............................................................................. 3 Electrical Requirements ............................................................ 4 Operating Controls .................................................................... 4 Initial Set-Up .................
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H H L L I I O O USER NOTICES Carefully read and follow all notices on the grinder and in this manual. They were written for your protection. All notices on the grinder are to be kept in good condition. Replace any unreadable or damaged labels. WARNING Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis. Follow national/local electrical codes. Do not use near combustibles. An extension cord, when used, must be shorter than 20 feet if 16-gage 3-con
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ELECTRICAL REQUIREMENTS This grinder has an attached cordset and requires 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz. OPERATING CONTROLS Off/On/Start Switch OFF - (upper position) Switching to this position stops all operation of the grinder. ON - (middle position) The switch will return to this position after a grind cycle has begun and will remain in this position after grinding has ceased. START - (lower, momentary position) Pressing the switch initiates a timed
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CLEANING The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. Care should be taken not to scratch the hopper or windows with any abrasive material. Regular cleaning will keep your grinder looking new for years. COFFEE GRINDING P597 P598 P599 P600 P601 STEP 1 STEP 2 STEP 3 STEP 4 STEPS 5 & 6 1. Visually inspect the desired hopper for an ample supply of whole bean coffee. 2. Place a paper filter into the brew
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E N I B H H L L F I I U O O ADJUSTMENTS The grind can be set from very fine to very coarse. The amount may be adjusted for use in most commer- cial coffee brewers. The following procedures should be used to make adjustments. A change in the burr adjust- ment will also change the amount dispensed. Any adjustment of the burrs should be followed by an adjustment of the timer. Burr Adjustment 1. Unplug the grinder and empty all beans from the hoppers. 2. Plug-in the grinder, momentarily press the of
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ADJUSTMENTS (cont.) 4. Plug-in the grinder. Select either the right or left hopper with the selector switch. Do not press the start switch. 5. If grinder has an analog timer, proceed to step 6. If grinder has a digital timer, momentarily press the center (DISPLAY) button on the dispense timer panel. The readout will indicate the present timer setting in sec- onds and will remain displayed for five minutes. 6. Adjust the timer setting to obtain the desired amount of coffee for the selected hopper
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Grinder will not start. 1. No power or incorrect voltage (A) Plug-in the grinder. 2. Off/On/Start switch (B) Check the voltage at the wall outlet with a voltmeter. It must be 120 volts ac. (A) Momentarily press the Off/On/ Start switch to the “START” (lower) position. (B) Refer to Service - Off/On/Start switch for testing procedures. See page 11. 3. Timer Refer to Service - Timer for testing procedures. See page 17. 4. Relay Refer to Service
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SERVICE This section provides procedures for testing and replacing various major components used in this grinder should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis. Follow national/local electrical codes. Do not use near combustibles. An extension cord, when used, must be shorter than 20 feet if 16-gage 3-conductor wire, or sho
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If voltage is not present as described, refer to SERVICE (cont.) the Wiring Diagrams, and check the grinder wiring harness. Motor Removal and Replacement - MOTOR 1. Remove all wires from the solenoids and lift the hopper assy out of the grinder housing. 2. Remove all wires from the Off/On/Start switch, motor, and motor mounting plate. 3. The entire wiring harness must be fed into the bottom of the grinder housing through the hole in the motor mounting plate. 4. Remove both 6-32 screws beneath th
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SERVICE (cont.) Motor (cont.) WHI/ BLU to Snubber WHI/BLU to Relay WHI/BLK to Cordset WHI/BLK to Snubber GRN to Chasis Ground YEL to Snubber P621 Removal and Replacement - GRIND CHAMBER 1. Remove the two 1/4"-20 screws holding the front cover to the burr housing. Carefully remove the burr housing front cover. Inspect the adjusting screw to see if the thrust plug is worn. Replace if excessively worn or damaged. 2. Carefully remove the rotor cup, shear plate, and burr rotor from the grinder. Insp
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the Wiring Diagrams and check the grinder wiring SERVICE (cont.) harness. Relay 4. Remove the white/red and white/blue wires from the relay contacts. 5. Check for continuity across the relay contacts when the Off/On/Start switch is pressed to the “START” (lower) position and released. Plug-in the grinder. Continuity must be present for the approximate setting on the timer. 6. Unplug the grinder. If continuity is present as described, reconnect the white/red and white/blue wires, the relay is ope
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SERVICE (cont.) WHI/YEL to RED/BLK to Solenoid(s) (cont.) Timer P4-5 Right Solenoid RED/BLK to RED/BLK to Timer P4-7 If continuity is present as described, reconnect Left Solenoid the white/brown wires to the grinder wiring harness, and proceed to #6. If continuity is not present as described, replace Right the solenoid. WHI/ORN to Timer P4-4 Left 6. Check the solenoid for coil action when the con- P612 trol switch is momentarily pressed to the “START” (lower) position and released. Plug-in the
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has been momentarily pressed to the right SERVICE (cont.) “START” (lower) position and released. Plug-in the grinder. The indication must be 120 volts ac Timer (cont.) and should remain for the approximate timer 4. Check the voltage across contacts 2 & 6 of the setting. larger connector on the timer board with a volt- 11. Unplug the grinder. meter when the control switch is in any position except “OFF” (center). Plug-in the grinder. The in- If voltage is present as described, the timer is dicati
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SERVICE (cont.) Timer (cont.) (P1-8) BLU to Off/On/Start Switch, Selector Switch (P1-6) ORA to Selector Switch (P1-2) VIO to Off/On/Start Switch BLK to Cordset (P1-1) YEL to Selector Switch BLK to Off/On/Start Switch WHI/BLK to Cordset P1 8 1 WHI/GRN to Relay Coil P2 WHI/ORN to Left Solenoid 3 1 1 1 P3 P4 11 WHI/YEL to Right Solenoid 8 WHI/RED to Off/On/Start Switch WHI/RED to Relay Contact RED/BLK to Relay Coil RED/BLK to Left Solenoid Digital Timer (P1-8) BLU to Off/On/Start Switch, BLK to
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