Bunn G2 TRIFECTA, G9WD, G9-2T DBC Solenoids Models MHG, FPG-2 DBC, LPG-2, G9-2, G9-2 DBC

Page 45

SERVICE (Cont.)

 

 

 

 

 

 

Solenoids (Models MHG, FPG-2 DBC, LPG-2, G9-2, G9-2 DBC)

 

 

 

 

 

 

If continuity is present as described, reconnect the

 

 

wires, and proceed to #7.

 

 

 

 

 

If continuity is not present as described, replace the

 

 

limit thermostat.

 

 

 

 

 

 

7. Check the solenoid for coil action when the control

 

 

 

switch is momentarily pressed to the “START”

 

 

 

(lower) position and released. Plug-in the grinder.

 

 

 

Listen carefully in the vicinity of the solenoid for

 

 

 

a “clicking” sound as the coil magnet attracts and

 

 

 

after a period of time, repels the plunger.

 

 

 

8.

Unplug the grinder.

 

 

 

 

P608

If the sound is heard as described and the plunger

 

remains unable to move or move freely, refer to the

 

FIG 46 SOLENOIDS

 

slide plate section.

 

 

 

 

 

 

 

 

 

 

Location:

If the sound is not heard as described, replace the

solenoid.

 

 

 

 

 

The solenoids are located on the mounting plate

 

 

 

 

 

 

 

 

 

 

 

immediately beneath the hoppers.

Removal and Replacement:

 

 

 

 

 

 

 

 

Test Procedure:

1. Remove the hopper assy from the grinder.

 

2.

Remove the four 8-32 slotted-head screws holding

1.

Unplug the grinder.

 

the solenoid coil to the solenoid panel.

 

2.

Connect a voltmeter across the left or right solenoid

 

 

3.

Feed the white/brown wires through the hole in the

 

coil terminals. Plug-in the grinder. Momentarily

 

 

solenoid mounting plate and loosely install the new

 

press the Off/On/Start switch to “START” (lower)

 

 

 

solenoid coil.

 

 

 

 

 

position and release (hopper selector switch must

 

 

 

 

 

 

4. Look through the collector on the bottom of the

 

be corresponding to the suspect solenoid). The

 

 

assy and adjust the slide plate travel distance when

 

indication must be 120 volts ac for 120V models

 

 

 

installing the solenoid coil.

 

 

 

and 230 volts ac for 230V models.

 

 

 

 

5. Push the solenoid plunger into the solenoid coil

3.

Unplug the grinder.

 

with your hand while moving the coil forward or

 

 

 

If voltage is present as described, proceed to #4.

 

backward in its mounting holes.

 

 

6. Securely tighten the mounting screws when the

If voltage is not present as described, refer to the Wiring

 

slide plate appears to have no metal showing in

Diagram and check the grinder wiring harness.

 

 

the front or back of the hopper hole.

 

4.

Separate the connectors on the white/brown wires

 

 

7. Refer to the following illustration when reconnect-

 

of the solenoids from the connectors on the grinder

 

 

ing the wires.

 

 

 

 

 

wiring harness (RED/BLK) and the limit thermo-

 

 

 

 

 

 

 

 

 

 

 

 

 

stat.

RED/BLK to

 

WHI/YEL to

 

5.

Check for continuity across the white/brown wires

Right Solenoid

 

Timer P4-5

 

 

on the suspect solenoid coil.

RED/BLK to

 

 

 

 

 

 

Timer P4-7

 

 

 

 

If continuity is present as described, reconnect the

 

 

 

 

 

 

white/brown wires to the grinder wiring harness, and

 

 

 

 

 

 

proceed to #6.

 

 

 

 

RED/BLK to

If continuity is not present as described, replace the

 

 

 

 

WHI/ORN to

 

Right

Left Solenoid

solenoid.

 

 

 

Timer P4-4

 

 

 

 

6.

Check for continuity across the terminals of the

Left

 

 

 

 

 

 

 

 

 

limit thermostat.

 

FIG 47 SOLENOID TERMINALS

P612

 

 

 

 

 

45

 

 

 

 

 

 

 

41545 122209

 

 

 

 

 

 

 

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Page 44 Page 46
Contents Phone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisBUNN-O-MATIC Commercial Product Warranty Contents Recommended Daily Cleaning Capacity ChartIntroduction G9 WD Packaging & Shim Removal Housing. FigureModel G9-2 Model G9WDModel G9 Models G1, G2, G3 & G2 trifectaModels LPG, LPG-2E Operating Controls Model MHG Power ON/OFF Pad e 100V ModelsPressing the pad allows programming access see Batch Selector SwitchPressing Grind initiates a timed grind cycle Hopper/Batch Selector Pads dSwitch for testing procedures Problem Probable Cause RemedyProcedures Volts for 230 volt modelsTroubleshooting Hoppers Placement proceduresFrom hopper Supplies of whole bean coffeeProblem Probable Cause Remedy Component Locations Component AccessService BAG Sensor Switch Models G1, G2, G3 orCUP Sensor Switch Model G2 Trifecta AC Motor and Grind Chamber Remove the electrical access panel at the rear of the motorAC Motor and Grind Chamber Install shear plate Install burr rotor cupGrind Chamber Components DC Motor and Grind Chamber G1MD only DC Motor Terminals DC Motor and Grind Chamber G1MD onlyMotor and Grind Chamber Removal Motor Motor Models LPG & FPGSolenoid and Gates ROTOR/AUGER, Burrs and Motor Cover Install load disc 11 flat side towards rotorDechaffer Dechaffer Models LPG & FPGMotor Models G9, G9-2, MHG Franklin MotorMarathon Motor Remove and inspect stationary burr9 for wear Replace if excessively worn or damagedLocation Snubber Models G9, G9-2, MHGGrinder Scale Model G9WD only CalibrationLevel 2 Functions Capacitor Terminals Capacitor Model LPG onlyCircuit Breaker Circuit Breaker Models LPG, LPG-2E, FPG, FPG-2 DBCViewed from rear Hopper Selector Switch Model LPG-2E onlyRefer to Fig. below when reconnecting the wires Hopper Selector Switch Model G9-2 onlyGrinders with Digital Timer OFF/ON/START SwitchGrinders with Analog Timer OFF/ON/START Switch TerminalsUrn/Carafe Switch Models G9, G9-2 Refer to the illustration below when reconnecting the wiresURN/CARAFE Switch Terminals Batch Selector Switch Model FPG Batch Selector SwitchBatch Selector Switch Terminals Potentiometer Terminals Potentiometer Model FPGRectifier Rectifier Models G1 MD, FPG-2 DBCRelay Early Model G-9 Test Procedure Disconnect the grinder from the power supplyRelay Relay TerminalsRelay Models G1, G2, G3, G2 trifecta Remove the white/red wires from relay contacts 7Early Models Late Models RelayRelay Models MHG, FPG-2 DBC, Late Model G-9, G9-2, G9-2 DBC Slide plates must always remain flat for proper operation Hopper Slide PlatesHopper Slide Plates Models MHG Solenoids Solenoids Models MHG, FPG-2 DBC, LPG-2, G9-2, G9-2 DBCPlace the hopper selector switch in the left posi- tion Timer Model LPG-2ETimer Models LPG, FPG Timer Terminals Timer Model G9Digital Timer Timer Model G9-2Analog Timer TimerControl Board Model MHG Refer to when connecting wires Control BoardControl Board Terminals Membrane Switches Model MHG only Membrane Switch Membrane SwitchNuetral EMI Filter Terminals EMI Filter Models FPG & FPG-2Funnel Sensing Coil Models MHG & G9-2 DBC Disconnect the harness from the memory clock board Memory Clock Board Model MHGDisplay Board Model MHG MOV1 Triac MAP for MHGControls Left Gate @ J1-1 Triac MAP for FPG-2 DBC and G9-2 DBCControls Relay @ J1-2 Controls Right Gate @ J1-350/60 HZ G9-2 DBC, G9-2T DBC W/SMART FunnelRelay Coil WHI/GRN 50 HZ Schematic Wiring Diagram G9-2TB DBC W/SMART FunnelSchematic Wiring Diagram MHG Wire + Gnd Single PHASE, 50/60HZVolts AC, 120 Volts AC 60 HZ Volts AC Wire Single PhaseWiring Diagrams Wiring Diagrams Schematic Wiring Diagram LPG Schematic Wiring Diagram LPG W/Capacitor Wiring Diagrams Schematic Wiring DiagramWiring Diagrams Schematic Wiring Diagram LPG-B Schematic Wiring Diagram G1, G2, G3 & G2 trifecta Volts AC Wire Single Phase 60 HZVolts AC 50 HZ Schematic Wiring Diagram G9A HDBLK WHI/RED WHI/YEL WHI/BLU SCHEMATICWIRINGDIAGRAMG9-2A HD Wiring Diagrams FPG 60 HZ Wiring DiagramsFPG-2A DBC
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FPG-2, G9-2T DBC, G9-2, G2 TRIFECTA, G9 specifications

Bunn has established itself as a leader in the coffee and beverage equipment industry, providing advanced solutions that cater to a variety of needs. Among its notable products are the Bunn LPG-2, G9, FPG-2, G9-2, and G9WD, which showcase the company’s commitment to innovation, quality, and efficiency.

The Bunn LPG-2 is an ideal solution for high-volume coffee production. This model features a two-watt heating element that ensures rapid brew cycles and consistent temperature control. With a sleek design and user-friendly interface, the LPG-2 simplifies the brewing process while delivering exceptional coffee quality. Its large capacity enables institutions to serve multiple customers simultaneously, making it suitable for restaurants, cafes, and hotels.

The G9 series, particularly the G9 and G9-2, are known for their versatility and robust performance. Both models come equipped with a stainless steel hot water faucet, allowing users to draw hot water for various applications such as tea or soup preparation. The G9 model is designed for single-brew operation, while the G9-2 accommodates dual brewing, making it an efficient choice for those needing to meet demand quickly. Additionally, both G9 models have advanced brewing technology to ensure optimal flavor extraction.

The FPG-2 model stands out for its precision and control over brewing parameters. It features a touchscreen interface that allows users to customize brew strength and temperature, ensuring that each cup meets individual preferences. The FPG-2 is also remarkably user-friendly, which is essential in a busy environment. Its dual-brew functionality allows it to serve two different coffee options simultaneously, enhancing service efficiency.

The G9WD is designed for those who require the ultimate convenience. Featuring a built-in water line connection, the G9WD minimizes the need for manual refilling, ensuring a continuous supply of fresh coffee. This model is equipped with a programmable timer, allowing users to set brew cycles in advance, which can be a significant time-saver during peak hours.

In summary, the Bunn LPG-2, G9, FPG-2, G9-2, and G9WD offer a range of features that cater to various coffee brewing needs. With advanced technologies, efficient designs, and user-centric interfaces, these models are engineered to deliver consistent, high-quality beverages, making them essential tools for any coffee-focused establishment. Whether for high-volume brewing or versatile beverage options, Bunn's offerings stand out in the competitive landscape of beverage equipment.
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