Bunn FMDA DBC-3 Guía Del Usuario
26
5. On dispensers with a hot water valve only, with a
voltmeter, and using pin 1 (green/black wire) of
the multi-pin connector of the door wiring harness
as a reference (-), check for voltage at pin 13 (blue/
red wire). Connect the dispenser to the power
source. The indication must be approximately 37
volts dc.
the multi-pin connector of the door wiring harness
as a reference (-), check for voltage at pin 13 (blue/
red wire). Connect the dispenser to the power
source. The indication must be approximately 37
volts dc.
6. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to step 6.
If voltage is not present as described, refer to the
wiring diagram and check the dispenser wiring har-
ness.
If voltage is not present as described, refer to the
wiring diagram and check the dispenser wiring har-
ness.
7. While pressing the appropriate switch, check for
continuity across the following pins of the digital
touch control switch assembly’s multi-pin con-
nector:
touch control switch assembly’s multi-pin con-
nector:
Note: Pin 1 of the connector is identified by an arrow
embossed on the connector housing.
embossed on the connector housing.
Left Small : pin 1 to pin 2
Left Medium: pin 2 to pin 3
Left Large: pin 1 to pin 3
Stop: pin 1 to pin 4
Center Small: pin 1 to pin 5
Center Medium: pin 5 to pin 6
Center Large: pin 1 to pin 6
Right Small: pin 1 to pin 7
Right Medium: pin 7 to pin 8
Right Large: pin 1 to pin 8
Hot Water: pin 1 to pin 13
Left Medium: pin 2 to pin 3
Left Large: pin 1 to pin 3
Stop: pin 1 to pin 4
Center Small: pin 1 to pin 5
Center Medium: pin 5 to pin 6
Center Large: pin 1 to pin 6
Right Small: pin 1 to pin 7
Right Medium: pin 7 to pin 8
Right Large: pin 1 to pin 8
Hot Water: pin 1 to pin 13
If continuity is present as described, the membrane
switch assembly is operating properly.
If continuity is not present as described, replace the
membrane switch assembly.
switch assembly is operating properly.
If continuity is not present as described, replace the
membrane switch assembly.
SERVICE (cont.)
DIGITAL TOUCH CONTROL SWITCH
P1631
Location:
The digital touch control switch is located on
the lower outside of the dispenser door.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Open dispenser door and remove the bottom door
1. Disconnect the dispenser from the power source.
2. Open dispenser door and remove the bottom door
cover.
3. Disconnect the wires from the door interconnect
wiring harness to the digital touch control switch
assembly.
assembly.
4. With a voltmeter, and using pin 1 (green/black
wire) of the multi-pin connector of the door inter-
connect wiring harness as a reference (-), check
for voltage at each of the following pins of the
connector: pin 2 (red/white wire), pin 3 (red wire),
pin 4 (black wire), pin 5 (white/back wire), pin 6
(orange wire), pin 7 (blue/white wire), and pin 8
(blue/black wire). Connect the dispenser to the
power source. The indication must be +5 volts dc.
If the dispenser does not have a hot water valve,
skip to #6.
connect wiring harness as a reference (-), check
for voltage at each of the following pins of the
connector: pin 2 (red/white wire), pin 3 (red wire),
pin 4 (black wire), pin 5 (white/back wire), pin 6
(orange wire), pin 7 (blue/white wire), and pin 8
(blue/black wire). Connect the dispenser to the
power source. The indication must be +5 volts dc.
If the dispenser does not have a hot water valve,
skip to #6.
FIG.13 DIGITAL TOUCH CONTROL SWITCH
29215 101599