Bunn TU3Q - Manual (Page 10)

Page 10
TROUBLESHOOTING (cont.)
PROBLEM PROBABLE CAUSE REMEDY
Brew cycle will not start (cont.)
Water is not hot
Dilution cycle will not start
Inconsistent beverage level in
dispenser
6. Brew Timer
7. Brew Solenoid Valve
1. Limit Thermostat
CAUTION - Do not eliminate or by-
pass limit thermostat or thermal
cut-off. Use only BOM replacement
part #29329.1000
2. Control Thermostat
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.
3. Water Pressure
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.
Refer to Service - Limit Thermostat
for testing procedures. See page
20.
Refer to Service - Control Thermo-
stat for testing procedures. See
page 19.
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.
The water pressure to the brewer
must be at least 20 psi (138 kPa).
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