Bunn F-15 Coffeemaker User Manual


 
FACTORY AUTHORIZED SERVICE
TROUBLE SHOOTING GUIDE
MODELS F·35, F·20, F·15
SYMPTOM
POSSIBLE CAUSE
WHAT TO CHECK
REMEDY
Cannot Start
1.No Water. 1.
Incoming water lines
1.
Be sure water shut
Brew Cycle
and water shut off valve.
off valve is open.
2.
No Power. 2.
Cord set and plug
2.
Check voltage at
connections. Fuse
terminal block. Refer
or circuit breaker.
to "Electrician's
Installation Instructions"
for correct voltage.
3.
On-Off toggle switch.
3.
With On-Off switch
3.If On-Off switch does
(This switch must be
in the ON position,
not make and break
in the ON position
indicator lamp shouldcontact, replace On-Off
·t()_start and complete
light and center
switch.
a brewing cycle.)
warmer should heat.
If not, check switchcontinuity .
4.
Start switch.
4.
Switch continuity.
4.
If start switch does
not make and break
contact, replace start
switch.
5.
Loose connection 5.
Plug and socket con-
5.Be sure these con-
in harness.
nections between harness
nections are tight.
,-
and relay, relay and
timer, and terminals
to solenoid.
6.
Relay.
6.
(A)
Contact points.
6.
(A)
Be sure contact
(B) Check relay for
points are clean.
energizing when
(B)
If relay does not
start switch is depressed
energize when start
to start a brew cycle
switch is depressed,
and for holding (remaining
this would indicate a
energized) after start
defective relay. If
switch is released.
steps 1 thru 5 have
been checked, replacerelay.If relay energizes
when the start switch
-
is depressed, but
deenergizes when start
switch is released,
refer to step 7.
7.
Timer.
7.
Check paddle arm on
7.
Should hear two clicks
timer to see if it
when micro switch arm
is holding the micro
is depressed and re-
switch arm down.
leased. If not, this
would indicate that the
paddle arm is not re-setting and is holding
the micro switch arm
down. Replace Timer.
8.
Solenoid valve.
8.
(A) Voltage at solenoid
8.(A)
If voltage is not
valve terminals.
present at terminals
Start a brew cycle
refer to steps 2 thru 7.
and check for 120
(B) If voltage is present
volts A.C. at terminals.
at terminals and water
(B)
If voltage is
at line pressure is
present at terminals,
present on the inlet
check for water at
side of the solenoid,
line pressure on the
but not present on the
inlet side of the
outgoing side, replace
solenoid volve. Re-
solenoid valve.
move flow valve,
start a brew cycle
and check for water
at line pressureon the outgoing
side of the solenoid valve.
4