Bunn G9 Service Manual

BUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE: (217) 529-6601 FAX: (217) 529-6644To obtain the Illustrated Part

10 The rear panel is attached with eight 8-32 slotted head screws. The hopper assembly is attached with four 6-32 slotted head screws with locking n

11SERVICE (cont.)Off/On/Start SwitchLocation: The Off/On/Start switch is located to the left side on the front of the housing above the upper fr

12SERVICE (cont.)MotorLocation: The motor is located in the upper wrapper.Test Procedure:1. Remove the cover plate located on the right side of the

13SERVICE (cont.)Motor (cont.)Removal and Replacement - GRIND CHAMBER1. Remove the two 1/4”-20 screws holding the front cover to the burr housing. C

14SERVICE (cont.)RelayLocation: The relay is located on the timer bracket in the grinder base. The bracket can be removed by loosen-ing the two 8-32

15SERVICE (cont.)Slide PlatesLocation: The slide plates are located on the solenoid mount-ing plate immediately beneath the hopper openings. The sl

16SERVICE (cont.)SnubberLocation: The snubber is located at the back of the motor attached to the right side of the wiring harness.Removal and Replac

17DISPENSE TIME (Seconds)DISPLAYIncreaseDecreaseReadout will be displayed for 5 minutes.Timer can only be adjustedwhile readout is displayed.+WARNIN G

184. Connect a voltmeter across contacts 2 & 6 of the larger connector (P4) on the timer board. Plug-in the grinder. When the control switch is i

19P614Digital TimerAnalog TimerSERVICE (cont.)Timer (cont.)10218 051603

2CONTENTS Introduction ... 2 Warranty ...

20SERVICE (cont.)Hopper Selector SwitchHOPPER SELECTOR SWITCHP594Location: The hopper selector switch is located in the center on the front of the ho

21SERVICE (cont.)Batch Selector Switch (Models w/Multi-Set option)P1038 P594Location: The Batch Selector Switch is located in the lower right front o

22WIRING DIAGRAM10218 051603

23BLUVIOYELGRYTANORARED/BLKWHIWHI/GRNWHI/ORAWHI/YELRED/BLKBLKWHI/REDWHI/BLUML2L1WHI/BLUWHI/BLKYEL230 VOLTS AC2 WIRESINGLE PHASE50 HZ10768.0000E 05/03

3USER NOTICES Carefully read and follow all notices on the grinder and in this manual. They were written for your protection. All notices on the gri

4ELECTRICAL REQUIREMENTS This grinder has an attached cordset and requires 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz f

5CLEANING The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipme

6ADJUSTMENTS The grind can be set from very fine to very coarse. The amount may be adjusted for use in most commercial coffee brewers. The following p

7TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the prob

8TROUBLESHOOTING (cont.)ProblemGrinder will not start. Grinder will not shut off.Remedy(A) Plug-in the grinder.(B) Check the vol

9Probable Cause1. Hoppers2. Bottoms of hoppers3. Off/On/Start switch4. Slide plates5. Solenoids 6. Shear plate7. Solenoid Limit Thermostat 1. Digital