Contents
FMD Series
Phone 217 529-6601 FAX 217
BUNN-O-MATIC Commercial Product Warranty
Excluding regular maintenance items
Introduction
Cleaning
Required Regular Maintenance
Problem Probable Cause
Problem
Product will not dispense
Level Control Board and Probe FMD-1
Remedy
Problem Probable Cause Remedy
Troubleshooting
Product overflows container Dispense Switch
Install a regulator if necessary to
Excess dust Fan Refer to Service
Procedures. See
42672
Component Access
20,23
SERVICEcont
Access Panels
Service Auger Drive Components all Models
Test Procedures Auger Motor
Location
Service
Auger Drive Components
Spacer Auger Motor Hopper Base Dust Seal Washer
Retainer Clip Panel RED to Control Board
Remove auger drive shaft bushing from hopper
Rinse and dry each item thoroughly
Bushing Panel Auger Drive Shaft
Locknut Auger Motor Bracket
Auxillary Control Board FMD DBC-3 only
Service Auxillary Control Board
Disconnect the dispenser from the power source
Service
Ballast all Models
Test Procedure Power Supply
Control Board
Check that the RINSE/RUN switch is in the Rinse position
Hopper Motor Control Circuitry
Using four #6-32 keps nuts
Connectors on the control board
Control Board
Control board to the component bracket
Control Board
Check that the rinse/run switch is in the run posi- tion
Control Board Connectors
Remove temperature probe from the tank
Location
Remove bulb from the tank
Control Thermostat
BLK to Main
WHI to Main
Open the dispenser door and remove the bottom door cover
If voltage is present as described, proceed to #6
If voltage is present as described, proceed to #7
Digital Touch Control Switch FMD DBC-2,DBC-3
FMD DBC-3
FMD DBC-2FD
Digital Touch Control Switch
Connectors
EMI Filter 230 Volt FMD DBC-3
EMI Filter
Test Procedures
Disconnect the black and white wires from the fan terminals
Vacuum FAN all Models
Frother and Whipper Motor all Models except -2FD
Frother and Whipper Motor
Frother and Whipper Motor
Will seat inside the whipper chamber
Hopper Drive Board FMD-1 only
Hopper Drive Board
Hopper Drive Board Terminals
HOT/COLD Switch Optional for FMD DBC-3
Disconnect the wires from the switch terminals
Terminals
Lamp Holder all Models
Door Assy Upper Panel Lamp Holders Lower Panel
Lamp Starter and Socket
Reconnect the violet wire to terminal
Level Control Board and Level Probe FMD-1 only
Level Board Terminals
Limit Thermostat all Models
Limit Thermostat
Overflow Protection Switch
Rinse /RUN Switch all Models
RINSE/RUN Switch
Solenoid Valve Cold Water Optional for FMD-2,-3,-4,-5
Cold Water Solenoid Terminals
Solenoid Valves Dispense all Models
Dispense Solenoid Valves P1637.40 Location
HOT Water Dispense Solenoid Valve FMD-2FD,DBC-2FD,-3,DBC-3
Solenoid Valve
Solenoid Valve Inlet all Models
Inlet Solenoid Valve
WHI or RED to Main BLK to Limit Wiring Harness
Tank Heater all Models
Tank Heater Relay FMD-4,-5,120V Dispensers only
BRN/BLK from WHI from Main Harness
Tank Heater Switch all Models
Tank Heater Switch
Disconnected from the main wiring harness
Transformer all Models
Remove and discard the transformer
Q1 & MOV1 Controls Left Whipper Motor
Q2 & MOV3 Controls Center Whipper Motor
Q5 & MOV4 Controls Right Whipper Motor
Q7 & MOV2 Controls Refill Valve
Schematic Wiring Diagram FMD-1
BLK
Schematic Wiring Diagram FMD-1A
WHI-16
Schematic Wiring Diagram FMD-2
Schematic Wiring Diagram FMD-2A
Schematic Wiring Diagram FMD DBC-2 Freeze Dried W/HOT Water
Schematic Wiring Diagram FMD-2FD
42672
42672
42672
42672
Schematic Wiring Diagram FMD DBC-3 With HOT Water Dispense
Schematic Wiring Diagram Fmda DBC-3 With HOT Water Dispense
42672
42672
42672
42672
Schematic Wiring Diagram FMD-5A
