Bunn TU3Q service manual Troubleshooting, Problem, Probable Cause, Remedy

TROUBLESHOOTING (cont.)

PROBLEM

Brew cycle will not start (cont.)

PROBABLE CAUSE

6.Brew Timer

7.Brew Solenoid Valve

REMEDY

Refer to Service - Brew Timer for testing procedures. See page 16 or 17.

Refer to Service - Brew Solenoid Valve for testing procedures. See page 15.

Water is not hot

1. Limit Thermostat	Refer to Service - Limit Thermostat
CAUTION - Do not eliminate or by-	for testing procedures. See page
pass limit thermostat or thermal	20.
cut-off. Use only BOM replacement
part #29329.1000
2. Control Thermostat	Refer to Service - Control Thermo-
	stat for testing procedures. See
	page 19.

Dilution cycle will not start

Inconsistent beverage level in dispenser

3. Tank Heater

1.ON/OFF (UNSWEET/OFF/SWEET) Switch

2.Start Switch

1.Syphon System

2.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 ini- tiate corrosive reactions resulting in serious leaks.

Refer to Service - Tank Heater for testing procedures. See page 23.

Refer to Service - ON/OFF Switch for testing. See page 21. For OFF/ SELECTOR switch See page 25.

Refer to Service - Start Switch for testing procedures. See page 22.

The brewer must be level or slightly lower in front to syphon properly.

Inspect the tank assembly for ex- cessive lime deposits. Delime as required.

3. Water Pressure	The water pressure to the brewer
	must be at least 20 psi (138 kPa).

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