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INTRODUCTION This equipment will automatically brew a half-gallon batch of coffee into an awaiting server at the press of a button. A hot water faucet may be included for allied beverage use. Most functions of the brewer are digitally controlled. It is only for indoor use on a sturdy counter or shelf. CONTENTS Introduction & Warranty .................................................................................... 2 User Notices ..............................................................
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ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz. L2 RED WHITE 120V.A.C. NEUTRAL WHITE 120V.A.C. 208 or 240V.A.C. L1 BLACK NEUTRAL 120V.A.C. L1 BLACK Model 20 requires 2-wire, grounded service rated Model 35 requires 3-wire, grounded service rated 120 volts ac, 20 amp, single phase, 60 Hz. Proceed as 120/2
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INITIAL SET-UP 1. Insert an empty funnel into the funnel rails. 2. Place an empty server under the funnel. 3. Connect the brewer to the power source. 4. Model CDBC-APS/TS/TSR – Press the "ON/OFF" switch (indicator glowing). Model CEZ-APS/TS/TSR – Place the "ON/OFF" switch in the "ON" upper position. 5. Water will flow into the tank and stop when the tank is filled to its capacity. 6. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature. 7. Place a small v
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CDBC-APS/TS/TSR ADJUSTMENTS & OPTIONAL SETTINGS P1912 Setting Brew Temperature The brewer is factory set to brew at 200°F(95°C). To change this setting, press and hold the "HIDDEN" switch beneath the "®". The word "TEMP" above the "ON/OFF" switch will glow to correspond with the temporary function change of this switch. Repeatedly press and release the "ON/OFF" switch until one of the bank of temperature indicators shows the approximate desired temperature. When two indicators are glowing, the t
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TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. • All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the appl
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TROUBLESHOOTING (cont.) REFILL CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Will not fill or refill 1. Power off to brewer (CDBC- Press ON/OFF switch on control APS/TS/TSR & CEZ-APS/TS/TSR) panel to determine if power is ON. 2. Water shut off (CDBC-APS/TS/ Make sure water is ON. TSR & CEZ-APS/TS/TSR) 3. Display flashing (CDBC-APS/ Brewer has shut down due to TS/TSR) or ready light flashing malfunction (See Diagnostic Chart (CEZ-APS/TS/TSR) in manual, Page 19, or under top lid of brewer). 4. ON/OFF Swit
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TROUBLESHOOTING (cont.) REFILL CIRCUIT (cont.) PROBABLE CAUSE PROBLEM REMEDY Fill or refill does not shut "OFF" 1. Lime build up on probe (CDBC- Remove Probe and check for lime (ON/OFF Switch "ON") APS/TS/TSR & CEZ-APS/TS/TSR) deposits on tip. Clean and reinstall. 2a. Water Level Probe Sensing A) Disconnect the brewer from the System (CDBC-APS/TS/TSR) power source. Disconnect the J3 connector from the control board. Check for continuity from the nut on top of the level probe to pin 1 of the plug
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TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Water does not heat to proper 1. Display flashing (CDBC-APS/ Brewer has shut down due to temperature TS/TSR) or ready light flashing malfunction (See Diagnostic Chart (CEZ-APS/TS/TSR) in manual, Page 19, or under top IMPORTANT: Make sure no tem- lid). perature tests are taken before the ready light is "ON". Tank tempera- 2. Water not touching tempera- Remove probe and grommet. Look ture must be stabilized before read- ture pro
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TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Water does not heat to proper 4a. Temperature Probe (CDBC- A) Remove the probe from the temperature (cont.) APS/TS/TSR) grommet and submerge in a water bath of approximately 70°F(21°C). IMPORTANT: Make sure no tem- Connect an ohmmeter to pins 3 perature tests are taken before the and 4 of the J3 connector. At ready light is "ON". Tank tempera- 60°F(16°C) the reading should be ture must be stabilized before read- 15.3k
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TROUBLESHOOTING (cont.) HEATING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming 2a. Temperature Probe (CDBC- A) Remove the probe from the (cont.) APS/TS/TSR) grommet and submerge in a water bath of approximately 70°F(21°C). Connect an ohmmeter to pins 3 and 4 of the J3 connector. At 60°F(16°C) the reading should be 15.3k ± 2k OHMS, at 70°F(21°C) the reading should be 11.8k ± 2k OHMS, and at 80°F(27°C) the read- ing should be 9.3k ± 2k OHMS. If the probe is within the
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TROUBLESHOOTING (cont.) BREWING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start 1. Display flashing (CDBC-APS/ Brewer has shut down due to TS/TSR) or ready light flashing malfunction (See Diagnostic Chart (CEZ-APS/TS/TSR) in manual, Page 19, or under top lid of brewer). 2. No water Water lines and valves to the brewer must be open. 3. No power or incorrect voltage to Check for voltage across the black the brewer and white terminals at the termi- nal block. 4. ON/OFF switch not in
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TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start (cont.) 8. Control board or dispense valve If the start switch (CEZ-APS/TS/ (CDBC-APS/TS/TSR & CEZ-APS/ TSR) or switch panel (CDBC-APS/ TS/TSR) TS/TSR) is operating properly, proceed as follows. Attach a volt- meter to the terminals of the dis- pense valve solenoid. Connect the brewer to the power source. Turn on the brewer and press the BREW switch. Voltage should be present at the solenoid t
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TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Dripping from sprayhead 1. Lime build up Inspect the tank assembly for ex- cessive lime deposits. Delime as required. 2. Dispense valve Remove the dispense valve and clear any obstructions. Rebuild or replace the valve if necessary.(See page 26) Weak beverage 1. Sprayhead A six-hole stainless steel spray- head must be used for proper extraction. 2. Water temperature Place an empty brew funnel on an empty server beneath
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TROUBLESHOOTING (cont.) BREWING CIRCUIT (cont.) PROBLEM PROBABLE CAUSE REMEDY Dry coffee grounds remain in the 1. Sprayhead Make sure sprayhead is present funnel and holes are clear and unob- structed. There should be six sepa- rate streams of water coming out of the sprayhead. ® 2. Funnel loading The BUNN paper filter must be centered in the funnel and the bed of grounds leveled by shaking gen- tly. 29253 071599 Page 18
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DIAGNOSTICS Intermittent flashing of the READY indicator (Model CEZ) or the bank of temperature indicators (Model CDBC) indicates that a fault exists. Count the number of flashes between pauses and use this chart as a guide to investigating the fault. FLASHES CAUSE THINGS TO CHECK 1 Dry Plug - In Fault - Water Pressure Sheath of temperature probe dry for 10 minutes after power-up Temperature probe wiring Fill valve wiring, function, & strainer Green wire between tank and circuit board 2 Low Tank
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SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service personnel. The brewer should be unplugged when servicing, except when electrical tests are re- quired and the test procedure specifically states to plug-in th
