Bunn Troubleshooting Guide for Hot Water Dispenser Error 3

Page 8

TROUBLESHOOTING (cont.)

PROBLEM

PROBABLE CAUSE

REMEDY

Product will not dispense (cont.)

9.Water strainer

10.Lime build-up

CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water conditions. Excessive mineral build-up on stain- less steel surfaces can initiate corro- sive reactions resulting in serious leaks.

(A)Direction of flow arrow must be pointing towards dispenser.

(B)Remove the strainer and check for obstructions. Clear or replace.

Inspect the tank assembly for exces- sive lime deposits. Delime as re- quired.

Water is not hot

1. Limit thermostat	Refer to Service - Limit Thermostat
CAUTION - Do not eliminate or by-	for testing procedures. See page 26
pass limit thermostat. Use only BOM
replacement part #29329.1000
2. Control thermostat	Refer to Service - Control Thermo-
	stat for testing procedures. See page
	16

Spitting or excessive steaming

3.Tank Heater

4.Tank heater switch

1. Lime build-up

CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water conditions. Excessive mineral build-up on stain- less steel surfaces can initiate corro- sive reactions resulting in serious leaks.

Refer to Service - Tank Heater for testing procedures. See page 32

Refer to Service - Tank Heater Switch for testing procedures. See page 33

Inspect tank assembly for excessive lime deposits. Delime as required.

2. Control thermostat	Refer to Service - Control Thermo-
	stat for testing procedures. See
	page 16

8	28364 051100

Image 8

Contents Post Office BOX SPRINGFIELD, Illinois Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty FMD-2 FMD-300656.0000 00831.0000 28368.000026536.0002 FMD-2Initial SET-UP Initial Fill & Heat Plumbing HOOK-UPDraining the HOT Water Tank Problem Probable Cause RemedyStat for testing procedures. See TroubleshootingReplacement Control thermostat Product overflows container Dispense switch Dripping from dispense tip Lime build-upLeaks ColdProblem Probable Cause RemedyRefer to Service Lamp, see page 23 for lamp replacement Dispenser is making unusualNoises Water Supply Tank Heater Excess dust Fan Display not lit Lamp Lamp Holder Starter Lamp BallastAuger Drive Components Component AccessContents Hopper Lid Auger Wire Agitator Disc Assy If voltage is present as described, proceed to #5Off of the auger drive shaft Auger Drive Shaft Optional Bushing Ejector ElbowAuger Drive Components Remove dust seal 18 from auger motorHarness BLK to BLU From Door Interconnect Refer to when reconnecting the wiresBallast Remove temperature probe from the tank Control ThermostatLocation Dispense SwitchControl Thermostat Location Dispense SwitchFAN FAN Frother and Whipper MotorSteam Collector Ring Mixing Chamber #8-32 Acorn Nut Washer Ring Nut FrotherFrother and Whipper Motor Hopper Delay Board Whipper Motor Terminals P1451.40HOT/COLD Switch Optional Disconnect the wires from the switch termi- nalsLamp Replacement Refer to Fig Lamp HolderDoor Assy Upper Panel Lamp Holders Lower Panel Remove the outside window and display graphicLevel Control Board and Level Probe As assemblyLamp Starter and Socket Level Control Board and Level Probe Limit Thermostat Limit ThermostatBoard Overflow Protection SwitchFrom Main Harness Rinse /RUN Switch RINSE/RUN SwitchSolenoid Valve Cold Water Optional Cold Water Solenoid ValveCold Water Solenoid Terminals Solenoid Valves DispenseSolenoid Valves Dispense Solenoid Valve InletSolenoid Valve Inlet Tank HeaterTank Heater Main Wiring Thermostat HarnessTank Heater Switch Tank Heater Switch Tank Heater Switch TerminalsSchematic Wiring Diagram FMD-1, FMD-2, & FMD-3 Schematic Wiring Diagram FMDA-1, FMDA-2, & FMDA-3