Bunn CWA-APS Instruction De Maintenance

Page 22

FIG. 17 TIMER TERMINALS

P1472

TL1 WHI/RED from ON/OFF Switch(1)
TL2 RED to Terminal Block (Red Insert)
TL3 WHI/ORN from Start Switch
TL4 WHI/GRN from Solenoid
TL5 WHI/YEL from Start Switch

FIG. 16 TIMER

P1468.40

Location:

The  timer is located inside the front of the trunk on

the component bracket. It consists of the  dial plate and
circuit board.

Test Procedure:
1. Disconnect the brewer  from the power source.
2. Remove the wires from terminals TL3, TL4, & TL5

of the timer and rotate the dial fully counterclock-
wise.

2. With a voltmeter, check the voltage across termi-

nals TL1 and TL2 when the ON/OFF switch is in the
“ON” (upper) position. Connect the brewer to the
power source. The indication must be 240 volts ac.

3. Disconnect the brewer from the power source.

If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the
Wiring Diagram and check the wiring harness.

4. Check for continuity across the white/orange wire

and white/yellow wire when the START switch is
held in the lower position.

If continuity is present as described, reconnect the
wires to terminals TL3, TL4, & TL5 of the timer board
and proceed to #5.

If continuity is not present as described, refer to the
Wiring Diagram and check the wiring harness.

5. With a voltmeter, check the voltage across termi-

nals TL1 and TL4 when the ON/OFF switch is in the
“ON” (upper) position and the START switch is
momentarily placed in the lower position.  Connect
the brewer to the power source. The indication
must be 240 volts ac for approximately twenty
seconds and then return to is previous indication.

6. Disconnect the brewer from the power source.

If voltage is present as described, the timer is operat-
ing properly.  Adjust the timer dial as required.
If voltage is not present as described, replace the
timer.

Removal and Replacement:
1. Remove all wires from the timer.
2. Remove the circuit board and dial plate from the

brackets. Remove the timer bracket and discard.

3. Install new timer circuit board directly to compo-

nent mouting bracket, as described in 

Late Model

Timer section on the following pages.

4. Refer to Fig.19 when reconnecting the wires.
5. Install the Timer Setting decal, provided with the

replacement timer kit, on the inside of the front
access panel.

6. Adjust the timer as required. Refer to 

Late Model

Timer section on the following pages.

OLD STYLE

10690.1 063000