Service - Bunn TU3Q Operating & Service Manual

SERVICE

This section provides procedures for testing and
replacing various major components used in this
brewer should service become necessary. Refer to
Troubleshooting for assistance in determining the
cause of any problem.
WARNING - Inspection, testing, and repair of electri-
cal equipment should be performed only by qualified
service personnel. The brewer should be disconnected
from the power source when servicing, except when
electrical tests are required and the test procedure spe-
cifically states to plug-in the brewer.
COMPONENT ACCESS
WARNING - Disconnect the brewer from the power
source before the removal of any panel or the replace-
ment of any component.
All components are accessible by the removal of
the top cover and rear inspection panel.
The top cover is attached with four #6-32 screws.
Removal of the top cover will allow access to ON/OFF
(UNSWEET/OFF/SWEET) switch, START switch, brew
timer, brew solenoid, control thermostat, limit ther-
mostat and tank heater.
Contents
rew Solenoid Valve ............................................ 15
B
Brew Timer (Early Models) .................................. 16
Digital Brew Timer (Late Models) ........................ 17
Control Thermostat .............................................. 19
Limit Thermostat ................................................. 20
ON/OFF Switch..................................................... 21
Start Switch ......................................................... 22
Tank Heater .......................................................... 23
Sweetener Solenoid Valve .................................... 24
OFF/SELECTOR Switch (Sweetener Option)......... 25
Wiring Diagrams .................................................. 26
FIG. 1 COMPONENT ACCESS
Page 14
P2092.40
10288 031604