Bunn CWTF-APS-MV Manuales De Servicio

Page 26

P1136

FIG. 20 TIMER TERMINALS

Location:

The timer is  located inside the front of the trunk on

the upper right side of component bracket.

Test Procedure.
1. Disconnect the brewer from the power source.
2. Disconnect the polarized, three pin connector from

the brewer wiring harness  and rotate the brew
timer dial fully counterclockwise.

3. With a voltmeter, check the voltage across sockets

P2  &  P3  (white  and  black  wires)  of  the  female
connector when the "ON/OFF" is in the "ON" (upper)
position. Connect the brewer to the power source.
The indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 120 volts ac for three wire 120/208 volt and 120/
240 volt models.

4. Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.
If  voltage  is  not  present  as  described,  refer  to  the
Wiring  Diagrams  and  check  the  brewer  wiring  har-
ness.

5. With  a  voltmeter,  check  the  voltage  across  the

sockets  P1  &  P2  (blue  and  white  wires)  of  the
female connector when the "ON/OFF" switch is in
the "ON" (upper) position   and start switch pressed.
Connect  the  brewer  to  the  power  source.  The
indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 120 volts ac for three wire 120/208 volt models
and 120/240 volt models.

6. Disconnect the brewer from the power source.

7. Reconnect  the  three  pin  connector  from  main

wiring harness to the timer.

If voltage is present as described, proceed to #8
If voltage is not present as described, refer to 

Wiring

Diagrams and check the brewer wiring harness.

8. Disconnect the black and white wires to the sole-

noid.

9. With  a  voltmeter,  check  the  voltage  across  the

black and white wires when the "ON/OFF" switch is
in  the  "ON"  (upper)  position  and  the  "START"
switch is pressed to the "START" (lower) position
and  released.  Connect  the  brewer  to  the  power
source. The indication must be:
a) 120 volts ac for approximately 20 seconds for
two wire 120 volt models.
b) 120 volts  ac for approximately 20 seconds for
three wire 120/208 volt and 120/240 volt models.

If voltage is present as described, the brew timer is
operating properly. Reset the timer dial as required, to
obtain the desired brew volume.
If  voltage  is  not  present  as  described,  replace  the
timer.

Removal and Replacement:
1. Remove all wires from the timer.
2. Remove the one #8-32 screw securing timer to

component bracket.

3

Install new timer circuit board as described in 

Late

Model Digital Timer section on the following pages.

4. Refer to Fig. 22 when reconnecting the wires.
5. Install the Timer Setting decal, provided with the

replacement  timer  kit,  to  the  rear  of  the  front
access panel, beneath the schematic.

5. Adjust the timer as required.  Refer to 

Late Model

Digital Timer Section on the following pages.

FIG. 19 TIMER

P2227.40

28182 090100

EARLY MODELS

To Main Wiring Harness

WHI to Solenoid Valve

BLK to Solenoid Valve

EARLY MODELS