Problem Probable Cause, On stainless steel surfaces can

TROUBLESHOOTING (cont.)
PROBLEM	PROBABLE CAUSE
Dripping from dispense tip	1. Lime build-up
	CAUTION - Tank and tank compo-
	nents should be delimed regularly
	depending on local water condi-
	tions. Excessive mineral build-up
	on stainless steel surfaces can
	initiate corrosive reactions result-
	ing in serious leaks.

REMEDY

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

2.Dispense solenoid valve (Hot or Cold)

Remove the dispense solenoid valve and clear any obstructions. Rebuild or replace the valve if necessary. See page 30 or 31

Water flows into tank continuously 1. Level control board and probe	Refer to Service - Level Control
	Board and Probe for testing
	procedures. See page 26

2.Solenoid valve (Inlet)

3.Overflow Protection Switch

Refer to Service - Solenoid Valve (Inlet) for testing procedures. See page 32

Refer to Service - Overflow Protection Switch for testing procedures. See page 28

9	27591 031597

Page 9

Image 9

Bunn HC-3 service manual Problem Probable Cause, Dripping from dispense tip Lime build-up, On stainless steel surfaces can

Contents

Serial # HC00025000 UP Bunn HC-2 Introduction Warranty User Notices 12368.000227620.0000 Electrical Requirements Initial SET-UPElectrical HOOK-UP Plumbing Requirements Adjustments CleaningDispenser USE Cold Beverage SET-UP Optional Troubleshooting Draining the HOT Water TankHopper Dispense Rate of Product Problem Probable Cause Remedy Troubleshooting Problem Dripping from dispense tip Lime build-up Problem Probable CauseOn stainless steel surfaces can Ing in serious leaks Testing procedure. See Weak product Water temperature30 or Tip with a thermometer Probable Cause Remedy Troubleshooting Problem Component Access ServiceContents Auger Drive Components If voltage is present as described, proceed to #5 Auger Drive ComponentsWasher Auger Motor Locknut Dust Seal Shoulder Screw Hopper Assy Right HC-2 Service Test Procedure BallastLocation Control Thermostat Remove temperature probe from the tankLocation Mechanical Thermostat Electronic Thermostat Optional Thermostat Terminals Control Thermostat Dispense Switch Dispense Switch FAN Test Procedures Steam Collector #6-32 Screw Mixing Chamber Frother and Whipper MotorRing Pull the mixing chamber 2 out of the whipper chamber Whipper Motor Terminals Frother and Whipper Motor Reconnect the eight pin connector to the hopper delay board Hopper Delay Board Disconnect the wires from the switch termi- nals HOT/COLD Switch Optional Lamp Replacement Refer to Fig Lamp HolderDoor Assy Service Level Control Board and Probe Level Control Board and Level Probe Limit Thermostat Level Board Terminals Overflow Protection Switch Overflow Protection Switch RUN/RINSE Switch RUN/RINSE Switch Cold Water Solenoid Valve Solenoid Valve Cold Water Optional Solenoid Valves Dispense Cold Water Solenoid Terminals Solenoid Valves Dispense Disconnect the water line from the solenoid valveSolenoid Valve Inlet Tank Heater Solenoid Valve Inlet Refer to when reconnecting the wires to the tank heater Tank Heater SwitchTank Heater Tank Heater Switch Terminals Tank Heater Switch MODELSONLYcont Transformer 240V TWO Wire Schematic Wiring Diagram HC-2, & HC-3 Schematic Wiring Diagram HCA-2, & HCA-3

Bunn HC-3 Problem Probable Cause, Dripping from dispense tip Lime build-up, Ing in serious leaks

Models: HC-3

TROUBLESHOOTING (cont.)

PROBLEM

PROBABLE CAUSE

Dripping from dispense tip

1. Lime build-up

on stainless steel surfaces can

ing in serious leaks.