Troubleshooting - Bunn F-35 Operating & Service Manual

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