Manuals / Bunn / Kitchen Appliance / Coffee Grinder

Bunn G9-2T DBC, LPG-2, G9WD, G1 Problem, Probable Cause, Remedy, Begin each grind cycle by visually

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

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Problem	Probable Cause		Remedy
Grinder starts, but will not dispense	1.	Hopper(s)	Begin each grind cycle by visually
from hopper.			inspecting the hopper(s) for ample
			supplies of whole bean coffee.
	2.	Blockage of hopper(s)	Foreign materials must not block
			the openings at the bottom of the
			hopper(s).

3.Slide Gate Solenoids (Model LPG- 2E only)

4.Timer

5.Off/On/Start switch

6.Slide plates

7.Solenoids

8.Solenoid Limit Thermostat

9.Shear Plate

Refer to Service - Solenoids for test- ing procedures.

Refer to Service - Timer for testing procedures.

Refer to Service - Off/On/Start switch for testing procedures.

(A)Check to see that the slide plates move freely to allow beans to travel into the grind chamber.

(B)Refer to Service -Slide Plates for testing procedures.

Refer to Service - Solenoids for test- ing procedures.

Refer to Service - Solenoids for test- ing procedures.

Remove both black fillister head screws holding the grinder selector dial plate to the grinder. Carefully remove the dial plate and rotor cup. Inspect the shear plate for wear. Replace if excessively worn or dam- aged.

Incorrect amount of coffee.	1.	Timer adjustment	Refer to the Adjustment section
			in the Installation and Operation
			Manual.
	2.	Snubber	Refer to Service - Snubber for re-
			placement procedures.

12	41545 122209

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Bunn G9-2T DBC, G9WD Problem, Probable Cause, Remedy, Begin each grind cycle by visually, Foreign materials must not block

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-2EPower ON/OFF Pad e 100V Models OPERATING CONTROLS Continued Model MHGModel 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 P602SERVICE Cont BAG SENSOR SWITCH Models G1, G2, G3 orCUP SENSOR SWITCH MODEL G2 TRIFECTA AC MOTOR AND GRIND CHAMBER SERVICE ContAC MOTOR AND GRIND CHAMBER cont SERVICE ContSERVICE Cont AC MOTOR AND GRIND CHAMBER contFIG. 5 GRIND CHAMBER COMPONENTS SERVICE Cont DC MOTOR AND GRIND CHAMBER - G1MD ONLYDC MOTOR AND GRIND CHAMBER - G1MD ONLY cont SERVICE ContSERVICE Cont 12. Slide burr auger rotor/spring assembly and burrDC MOTOR AND GRIND CHAMBER - G1MD ONLY cont MOTOR Models LPG & FPG SERVICE ContFIG. 10 MOTOR REMOVAL SERVICE Cont MOTOR Models LPG & FPG8. Remove spacer plate 3 and set aside for reas- sembly SERVICE Cont 21. Discard old motor and housing assemblyMOTOR 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 ContSNUBBER Models G9, G9-2, MHG SERVICE ContWHI/ BLU to Snubber Grinder Scale Model G9WD only CALIBRATION LEVEL 2 FUNCTIONSSERVICE Cont Capacitor Model LPG only SERVICE ContFIG. 20 CAPACITOR Circuit Breaker Models LPG, LPG-2E, FPG, FPG-2 DBC SERVICE ContRED 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 bluHopper Selector Switch Model G9-2 only SERVICE ContFIG. 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 P4-6Urn/Carafe Switch Models G9, G9-2 SERVICE ContFIG 30 URN/CARAFE SWITCH Batch Selector Switch Model FPG SERVICE ContORN to TIMER Potentiometer Model FPG SERVICE ContFIG 34 POTENTIOMETERS Rectifier Models G1 MD, FPG-2 DBC SERVICE ContFIG. 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 ContRELAY cont SERVICE 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” lowerTimer Model LPG-2E SERVICE ContP1061 Timer Models LPG, FPG SERVICE ContTimer Model LPG-2E P1748Timer Model G9 SERVICE ContIf 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 TERMINALSFIG 55 CONTROL BOARD SERVICE ContControl 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 YESFIG 58 MEMBRANE SWITCH SERVICE ContMembrane Switches Models FPG-2 & G9-2 DBC EMI Filter Models FPG & FPG-2 SERVICE Cont118.0 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 FUNNELSCHEMATIC WIRING DIAGRAM G9-2TB DBC W/SMART FUNNEL 100 VOLTS AC 2 WIRE SINGLE PHASE 50 HZWIRING 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 HZWIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM LPG-A230 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 HZ230 VOLTS AC 2 WIRE SINGLE PHASE 50 HZ SCHEMATICWIRINGDIAGRAMG9-2A HDWIRING 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