Bunn 41722.0000A manual Problem, Brew cycle will not start Water is not hot, Probable Cause

Page 5

TROUBLESHOOTING (cont.)

PROBLEM

Brew cycle will not start (cont.)

Water is not hot

PROBABLE CAUSE

3.ON/OFF Switch

4.Start Switch

5.Timer

6.Solenoid Valve

7.Water strainer/flow control (If equipped)

1.(A) Limit Thermostat

(B)Thermal Cut-Off (230V) CAUTION - Do not eliminate or bypass limit thermostat or thermal cut-off. Use only BOM replacement parts.

2.Control Thermostat

3.Tank Heater

REMEDY

Refer to Service - ON/OFF Switch for testing.

Refer to Service - Start Switch for testing procedures.

Refer to Service - Timer for test- ing procedures.

Refer to Service - Solenoid Valve for testing procedures.

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

(B)Remove the strainer/flow control and check for obstruc- tions. Clear or replace.

Refer to Service - Limit Ther- mostat for testing procedures. Thermal Cut-Off for testing procedures.

Refer to Service - Control Ther- mostat for testing procedures.

Refer to Service - Tank Heater for testing procedures.

Page 5	41722 070209

Image 5

Contents Phone 217 529-6601 FAX 217 TB3/TB6 SeriesBUNN-O-MATIC Commercial Product Warranty Contents To the brewer Probable Cause RemedyBrew cycle will not start No water Brew cycle will not start Water is not hot ProblemProbable Cause Control Thermostat Tank HeaterSurfaces can initiate corrosive Inconsistent beverage levelReactions resulting in serious LeaksBeverage overflows dispenser Refer to Service Timer for test- ing proceduresSpitting or excessive steaming Dripping from sprayhead Plumbing Lines Water Supply Dry coffee grounds remainFunnel Brewer is making unusal noises Cont Tank heater Problem Probable Cause RemedyBrewer is making unusal noises Tank Heater Location Control thermostat is located in the hood Component AccessControl Thermostat Adjust the control thermostat as required Disconnect the control thermostat wiresLimit Thermostat Remove all wires from limit thermostat termi- nals1680W-120V 1680W-100V 1680W-230V 29.0 33.7 Disconnect the brewer from the power supplyTank Heater Orange light Lighted ON/OFF Switch TB3/TB3QRefer to -2 when reconnecting the wires Through four when the switch is in the oposite Position Switch is located on the front control panelSwitch If continuity is present as described, replace the wires37080.0001to T. Stat Start SwitchesInlet Valves BREW/DILUTION Timer TB3 & TB6 Triacs TH-1/MV-1 Brew solenoid TH-2/MV-2 Dilution solenoid BREW/DILUTION Timer TriacsWhite Red Neutral L2 Digital Brew Timer TB3Q & TB6QTerminals ½ batch connector Triacs MV-2 Brew solenoid output MV-1 Line Digital Timer TriacsVolts AC Wire Single Phase Schematic Wiring Diagram TB3QSchematic Wiring Diagram TB3, TB3B, TB3-LP Schematic Wiring Diagram TB3Q Schematic Wiring Diagram TB3Q W/SWEETENER & Empty BAG Detect Schematic Wiring Diagram TB6 Schematic Wiring Diagram TB6Q