Bunn ITB/ITCB, ICB/TWIN manual Brewing Circuit Problem Probable Cause Remedy

Page 7

TROUBLESHOOTING (cont.)

BREWING CIRCUIT

PROBLEM

 

PROBABLE CAUSE

 

REMEDY

Brew cycle will not start

 

1. Display's error message

Brewer has shut down due to mal-

 

 

 

 

 

function. See Diagnostics.

 

2.

No water

Water lines and valves to the brewer

 

 

 

 

 

must be open.

 

 

3. No power or incorrect voltage to

Check for voltage across the termi-

 

 

the brewer

nals at the terminal block.

 

4.

ON/OFF switch not in the "ON"

The indicator lamp must be lit

 

 

position

 

 

5.

Low water temperature (Brew

Allow brewer to heat until ready, or

 

 

lockout is enabled)

disable the brew lockout feature.

 

 

 

 

 

Water must be in contact with refill

 

6.

Water not touching refill probe

probe before brew cycle will start.

 

 

inside tank

 

 

7.

Membrane Switch

Check/replace

 

8.

Dispense valve

Check/replace

 

9.

Control board

Check/replace

 

 

Consistently low beverage level in

 

1. Brew volume

Inspect the dispense valve and

the dispenser or beverage overflows

 

NOTE: Volume adjustments must be

sprayhead for excessive lime de-

dispenser

 

made with sprayhead installed.

posits. Delime as required.

 

2.

Lime build up

Remove dispense valve and clear

 

 

 

 

 

any obstructions. Rebuild or replace

 

 

 

 

 

valve if necessary. (See page 24)

 

3.

Dispense Valve

Check/replace

7

42461 0911809

 

Image 7
Contents ITB/ITCB ICB/TWIN BUNN-O-MATIC Commercial Product Warranty Introduction Control Boards TroubleshootingRemedy TroubleshootingRefill Circuit Problem Probable CauseHeating Circuit Problem Probable Cause Remedy Brewing Circuit Problem Probable Cause Remedy Problem Probable Cause Remedy Troubleshooting Brewing CircuitMessage Probable Cause Remedy DiagnosticsICB Component Access Component AccessControl Board Membrane Switch Continuity Membrane SwitchExploded View Early Brew ValveLate Model Brew Valve Brew Valve Late ModelsRefill Valves DisassemblyEarly Itcb Refill Valves Early ICBICB Twin Tank Heaters Tank HeatersLimit Thermostats Limit ThermostatTesting Temperature Probe Temperature ProbeCalibrate Temp Probe CalibrationTest Procedure Voltage Selector SwitchTest Procedure Removal and Replacement Power SwitchSchematic Wiring Diagram iTCBA, iTCBB Schematic Wiring Diagram With Factory Sweetener Schematic Wiring Diagram ICB-DV Schematic Wiring Diagram ICB Twin Schematic Wiring Diagram iCBA, iCBB Schematic Wiring Diagram ICB Twin 230V Chassis Ground Term Schematic Wiring Diagram ITB