Instruction/ maintenance manual of the product TWF-EZ Bunn
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BUNN-O-MA TIC CORPORA TION TWF-EZ POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 TELEPHONE: (217) 529-6601 FAX: (217) 529-6644 29466.0000C 8/00 © 1999 Bunn-O-Matic Corporation OPERA TING &.
Page 2 CONTENTS Introduction .............................................................. 2 Warranty ................................................................... 2 User Notices ............................................................. 3 Electrical Requirements .
Page 3.
Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power sour ce until specified in Initial Set-Up. 120V model brewers require 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz. Proceed as follows: Electrical Hook-Up CAUTION – Improper electrical installation will damage electronic components.
Page 5 INITIAL SET -UP 1. Insert the funnel (empty) into the funnel rails. 2. Place an empty tea dispenser on the brewer base. Be prepared to empty the dispenser a few times. 3. Plug in the brewer , place the TEA/OFF/COFFEE switch in the “ COFFEE ” position, and momentarily press the start switch.
Page 6 OPERA TING CONTROLS A. TEA/OFF/COFFEE Switch TEA- Placing the switch in the full left position allows the start switch to activate a timed brew cycle for a 0.
Page 7 TWF-EZ ADJUSTMENTS & OPTIONAL SETTINGS.
Page 8 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 T echnical Service Department.
Page 9 TROUBLESHOOTING (cont.) BREW CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Ready Light Flashing Brew cycle will not start 1. Brewer has shut down due to malfunction. 1. No water 2. No power or incorrect voltage to the brewer 3. TEA/OFF/COFFEE Switch 4.
Page 10 TROUBLESHOOTING (cont.) BREW CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Refer to Adjustments and Optional Settings to set brew volume. See page 7. Using a stop watch or sec- ond hand, time the length of the brew cycle. Record this time inside the top lid.
Page 11 TROUBLESHOOTING (cont.) BREW CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Dripping from sprayhead Weak beverage Drip out time too long 1. Lime build up 2. Brew Solenoid V alves 1. Sprayhead 2. Water temperatur e 3. Filter type 4. Funnel loading 1. Funnel Tip (T ea brewing) Inspect the tank assembly for ex- cessive lime deposits.
Page 12 TROUBLESHOOTING (cont.) BREW CIRCUIT PROBLEM PROBABLE CAUSE REMEDY Dry tea leaves or coffee grounds re- main in the funnel 1. Sprayhead 2. Funnel loading Make sure sprayhead is present and holes are clear and unobstructed. There should be seven separate streams of water coming out of the sprayhead.
Page 13 TROUBLESHOOTING (cont.) HEATING CIRCUIT PROBLEM PROBABLE CAUSE REMEDY 29466 082200 W ater does not heat to proper temperature IMPORT ANT : Make sure no tem- perature tests are taken before the ready light is "ON". T ank tempera- ture must be stabilized before read- ings are taken.
Page 14 DIAGNOSTICS Intermittent flashing of the READY indicator indicates that a fault exists. Count the number of flashes between pauses and use this chart as a guide to investigating the fault.
Page 15 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessar y .
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Page 17 P1960.60 FIG. 4 ICED TEA BREW SOLENOID V AL VE Location: Viewing the brewer from the rear the iced tea brew solenoid valve is mounted in the center of the mount- ing bracket. Test Procedures: 1. Disconnect the brewer from the power sour ce. 2.
Page 18.
Page 19 SERVICE (cont.) LIMIT THERMOST A T FIG. 8 LIMIT THERMOST A T P1960.60 Location: The limit thermostat is located inside the hood on the tank lid. T est Pr ocedure: 1. Disconnect the brewer from the power sour ce and remove the blue wire from the limit thermostat.
Page 20 FIG.11 TEA/OFF/COFFEE SWITCH TERMINALS P1525 SERVICE (cont.) TEA/OFF/COFFEE SWITCH FIG. 10 TEA/OFF/COFFEE SWITCH P1808.40 Location: The TEA/OFF/COFFEE switch is located in the front of the hood, above and to the left of the brew funnel. T est Pr ocedure: 1.
Page 21 SERVICE (cont.) ST ART SWITCH FIG. 12 ST ART SWITCH P1808.40 Location: The start switch is located in the front of the hood, above and to the right of the brew funnel. T est Pr ocedure: 1. Disconnect the brewer from the power sour ce. 2. Remove white/yellow and white/orange wires from the Start switch.
Page 22 FIG. 14 T ANK HEA TER Location: The tank heater is located inside the tank and se- cured to the tank lid. T est Pr ocedures: 1. Disconnect the brewer from the power supply . 2. With a voltmeter , check the voltage across the black and white wires.
Page 23 SERVICE (cont.) TEMPERA TURE PROBE FIG. 16 TEMPERA TURE PROBE P1960.60.
Page 24 SERVICE (cont.) THERMAL FUSE FIG. 18 THERMAL FUSE P1960.60 Location: The thermal fuse is located inside the hood con- nected to the right tank heater terminal. T est Pr ocedures: 1. Disconnect the brewer from the power sour ce. 2. Disconnect the thermal fuse from the tank heater terminal and the limit thermostat.
Page 25 SERVICE (cont.) CONTROL BOARD FIG. 20 CONTROL BOARD P1960.50 TRM1 T R M 2 J 6 J 7 J3 J 1 J4 J2 J 5.
Page 26 29466 082200.
An important point after buying a device Bunn TWF-EZ (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn TWF-EZ yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn TWF-EZ - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn TWF-EZ you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn TWF-EZ will certainly help you make a decision on the purchase.
If you already are a holder of Bunn TWF-EZ, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn TWF-EZ.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn TWF-EZ. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn TWF-EZ along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
