Manuals / Bunn / Kitchen Appliance / Coffee Grinder

Bunn G9-2T DBC, LPG-2, G9WD Membrane Switches Model MHG only, SERVICE Cont, Test Frequency? No Yes

Models: FPG-2 G1 FPG G9-2T DBC G9-2 G9 G9WD LPG-2

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Membrane Switches (Model MHG only)

SERVICE (Cont.)

Membrane Switches (Model MHG only)

FIG 57 MEMBRANE SWITCH

Location:

The membrane switch is located on the front of the hopper housing.

Test Procedure:

1.Press and hold the right hidden button to enter programming.

2.Scroll through the menus to Service Tools and select YES.

3.Select YES at Test Outputs and scroll through to Test Switches by pressing NEXT.

4.Follow the chart below to test all switches.

If any of the switches indicate a fault, replace the membrane switch.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the rear access panel.

3.Disconnect the membrane switch harness from the control board.

4.Carefully peel the membrane switch from the front of the switch bezel.

5.Remove any excess adhesive from the bezel sur- face.

6.Remove the backing from the new membrane switch.

7.Feed the membrane switch harness through the openning and apply the new membrane switch to the switch bezel.

8.Connect the switch harness to J9 on the display board.

TEST SWITCHES?

NO YES

PRESS RIGHT

HIDDEN TO EXIT

NOTHING PRESSED

TEST FREQUENCY?

NO YES

PRESSING ANY BUTTON

EXCEPT THE RIGHT HIDDEN

BUTTON WILL DISPLAY

THE BUTTON NAME

ON THE SCREEN

52	41545 122209

Image 52

Bunn G9-2T DBC, LPG-2, G9WD, G1, FPG-2 service manual Membrane Switches Model MHG only, SERVICE Cont, Test Frequency? No Yes

Contents

BUNN-O-MATIC CORPORATION SERVICE & REPAIR MANUALGRINDERS Includes MHG, FPG FPG-2, LPG-2, G1, G2, G3 G2 trifecta, G9, G9WDBUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY CONTENTS RECOMMENDED DAILY CLEANING CAPACITY CHARTINTRODUCTION ADJUSTMENTSMUST BE COMPLETED BY AUTHORIZED SERVICE PERSONNEL DO NOT PLUG IN SEE INSTRUCTIONS BELOW BEFORE USINGG9 WD - Packaging & Shim Removal housing. FigureOff/On/Start Switch Hopper Selector SwitchBatch Selector Switch Optional Dispense TimerOPERATING CONTROLS Continued Model G9Models G1, G2, G3 & G2 trifecta Models LPG, LPG-2EOPERATING CONTROLS Continued Model MHG Power ON/OFF Pad e 100V ModelsModel G9-2T DBC Batch Selector Switch OPERATING CONTROLS Continued Model FPGModel FPG-2 DBC PAD cTROUBLESHOOTING ProblemProbable Cause RemedyTROUBLESHOOTING cont ProblemProbable Cause RemedyProblem Refer to Service - Snubber for reProbable Cause RemedyPROBLEM PROBABLE CAUSEREMEDY TROUBLESHOOTING contSERVICE Component AccessComponent Locations P602BAG SENSOR SWITCH Models G1, G2, G3 or SERVICE ContCUP SENSOR SWITCH MODEL G2 TRIFECTA AC MOTOR AND GRIND CHAMBER SERVICE ContAC MOTOR AND GRIND CHAMBER cont SERVICE ContAC MOTOR AND GRIND CHAMBER cont SERVICE ContFIG. 5 GRIND CHAMBER COMPONENTS SERVICE Cont DC MOTOR AND GRIND CHAMBER - G1MD ONLYDC MOTOR AND GRIND CHAMBER - G1MD ONLY cont SERVICE Cont12. Slide burr auger rotor/spring assembly and burr SERVICE ContDC MOTOR AND GRIND CHAMBER - G1MD ONLY cont SERVICE Cont MOTOR Models LPG & FPGFIG. 10 MOTOR REMOVAL MOTOR Models LPG & FPG SERVICE Cont8. Remove spacer plate 3 and set aside for reas- sembly 21. Discard old motor and housing assembly SERVICE ContMOTOR Models LPG & FPG DECHAFFER Models LPG & FPG SERVICE ContFIG. 14 DECHAFFER REMOVAL/REPLACEMENT OPTONAL EXTRAMOTOR Models G9, G9-2, MHG FIG. 15 MOTORSERVICE Cont FIG. 16 MOTOR WIRINGFIG. 17 MOTOR AND GRIND CHAMBER Replace if excessively worn or damagedNOTE Burrs must be replaced as a set SERVICE ContSERVICE Cont SNUBBER Models G9, G9-2, MHGWHI/ BLU to Snubber LEVEL 2 FUNCTIONS Grinder Scale Model G9WD only CALIBRATIONSERVICE Cont SERVICE Cont Capacitor Model LPG onlyFIG. 20 CAPACITOR SERVICE Cont Circuit Breaker Models LPG, LPG-2E, FPG, FPG-2 DBCRED from Motor-LPG-2E BLK from Start Switch-LPG BLK from Power Cord Hopper Selector Switch Model LPG-2E only SERVICE ContFIG. 24 HOPPER SELECTOR SWITCH WHI to OFF/ON/START Switch BLU to Timer P1-4 bluSERVICE Cont Hopper Selector Switch Model G9-2 onlyFIG. 26 HOPPER SELECTOR SWITCH SERVICE Cont VIO to timer P1-2 BLK to Cordset BLK to timer P4-1WHI/RED timer to P4-6 BLU to SW2 PNK to Intf conn VIO to timer P1-2 BLK to Cordset WHI/RED timer to P4-6SERVICE Cont Urn/Carafe Switch Models G9, G9-2FIG 30 URN/CARAFE SWITCH SERVICE Cont Batch Selector Switch Model FPGORN to TIMER SERVICE Cont Potentiometer Model FPGFIG 34 POTENTIOMETERS SERVICE Cont Rectifier Models G1 MD, FPG-2 DBCFIG. 37 RECTIFIER TERMINALS Relay Early Model G-9 SERVICE ContSingle set timer shown Multi set timer Urn/Carafe similarRelay Models G1, G2, G3, G2 trifecta SERVICE ContSERVICE Cont RELAY contFIG. 41 RELAY TERMINALS Relay Models MHG, FPG-2 DBC, Late Model G-9, G9-2, G9-2 DBC SERVICE ContFIG 42 RELAY FIG 43 RELAY TERMINALS5. Inspect the slide plates after reassembly. They must move freely The slide plates must always remain flat for proper operationSERVICE Cont Replace if excessively worn or damagedHopper Slide Plates Models MHG SERVICE Cont5. Inspect the slide plates after reassembly. They must move freely The slide plates must always remain flat for proper operationSolenoids Models MHG, FPG-2 DBC, LPG-2, G9-2, G9-2 DBC SERVICE Cont7. Check the solenoid for coil action when the control press the Off/On/Start switch to “START” lowerSERVICE Cont Timer Model LPG-2EP1061 Timer Models LPG, FPG SERVICE ContTimer Model LPG-2E P1748SERVICE Cont Timer Model G9If voltage is present as described, proceed to step Timer Model G9-2 FIG 52 TIMERSERVICE Cont Digital TimerControl Board Model MHG SERVICE ContFIG 53 CONTROL BOARD FIG 54 CONTROL BOARD TERMINALSSERVICE Cont FIG 55 CONTROL BOARDControl Board Models FPG-2 & G9-2 DBC Membrane Switches Model MHG only SERVICE ContTEST SWITCHES? NO YES PRESS RIGHT HIDDEN TO EXIT NOTHING PRESSED TEST FREQUENCY? NO YESSERVICE Cont FIG 58 MEMBRANE SWITCHMembrane Switches Models FPG-2 & G9-2 DBC SERVICE Cont EMI Filter Models FPG & FPG-2118.0 kΩ - 118.5 kΩ Across either pair Funnel Sensing Coil Models MHG & G9-2 DBC SERVICE ContFIG 62 FUNNEL SENSING COIL FIG 63 FUNNEL SENSING COIL TERMINALSMemory Clock Board Model MHG SERVICE ContMEMORY BOARD GRN WHI RED BLKDisplay Board Model MHG SERVICE ContFIG 66 DISPLAY BOARD To Control Board J8TRIAC MAP for MHG @ J5-4,5,6TH1 & MOV2 TH2 & MOV3TRIAC MAP for FPG-2 DBC and G9-2 DBC TH1 & MOV1TH2 & MOV2 TH3 & MOV3SCHEMATIC WIRING DIAGRAM WIRING DIAGRAMS2 WIRE SINGLE PHASE 50/60 HZ G9-2 DBC, G9-2T DBC W/SMART FUNNELSCHEMATIC WIRING DIAGRAM WIRING DIAGRAMS2 WIRE SINGLE PHASE 50/60 HZ G9-2 DBC, G9-2T DBC W/SMART FUNNEL100 VOLTS AC 2 WIRE SINGLE PHASE 50 HZ SCHEMATIC WIRING DIAGRAM G9-2TB DBC W/SMART FUNNELWIRING DIAGRAMS 2 WIRE SINGLE PHASE 50/60 HZSCHEMATIC WIRING DIAGRAM MHG WIRING DIAGRAMSSCHEMATIC WIRING DIAGRAM MHG with WD CBA WIRING DIAGRAMS100 VOLTS AC, 120 VOLTS AC 240 VOLTS AC 2 WIRE + Gnd SINGLE PHASE, 50/60HZSCHEMATIC WIRING DIAGRAM LPG-2E, LPGB-2EWIRING DIAGRAMS 100 VOLTS AC 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZWIRING DIAGRAMS WIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM LPG 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZLPG-A WIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM230 VOLTS AC 2 WIRE SINGLE PHASE 50/60 HZ WIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM LPG W/Capacitor 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM LPG-B 100 VOLTS AC 2 WIRE SINGLE PHASE 50-60 HZWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM G1, G2, G3 & G2 trifecta2 WIRE + GRD SINGLE PHASE 50/60 HZ 100 VOLT AC 120 VOLT AC 230 VOLT AC 240 VOLT ACSCHEMATIC WIRING DIAGRAM G9 SCHEMATIC WIRING DIAGRAM G9-URN/CARAFE120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ 2 WIRESCHEMATIC WIRING DIAGRAM G9A HD 50 HZWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM G9WD-RHSCHEMATIC WIRING DIAGRAM G9 SCHEMATIC WIRING DIAGRAM G9WIRING DIAGRAMS 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZSCHEMATICWIRINGDIAGRAMG9-2A HD 230 VOLTS AC 2 WIRE SINGLE PHASE 50 HZWIRING DIAGRAMS WIRING DIAGRAMS FPGA WIRING DIAGRAMS120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ 230 VOLTS AC 2 WIRE SINGLE PHASE 50/60 HZ100 VOLTS AC 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ WIRING DIAGRAMSFPG-2 DBC, FPGB-2 DBC SCHEMATIC WIRING DIAGRAMFPG-2A DBC 230 VOLTS AC50 HZ SCHEMATIC WIRING DIAGRAM