Bunn H5E H5X Coffeemaker User Manual


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9
SERVICE
This section provides procedures for testing and
replacing various major components used in this dis-
penser should service become necessary. Refer to
Troubleshooting for assistance in determining the cause
of any problem.
Component Access
WARNING – Disconnect the dispenser from the power
source before the removal of any panel or the replace-
ment of any component.
The limit thermostat, liquid level probe, tank heater,
and temperature sensor are located at the top of the
dispenser. Access is gained by removing the top lid,
attached with three 4-40 slotted-head screws.
The triac assembly is located beneath the tank. Access
is gained by removing four feet and the bottom panel
attached with seven 8-32 slotted-head screws.
NOTE - Completely drain the tank before tipping the
dispenser.
WARNING – Inspection, testing, and repair of electrical
equipment should be performed only by qualified ser-
vice personnel. Disconnect the dispenser from the
power source when servicing, except when electrical
tests are required and the test procedure specifically
states to connect the dispenser to the power source.
Electronic Controls ............................................. 10
Limit Thermostat ................................................ 16
Safety Overflow Switch ....................................... 17
Solenoid Valve .................................................... 18
Tank Heater ........................................................ 19
Electronic Control Assembly Troubleshooting:
Check these items first
• Is circuit board popped-out of bracket?
• Is circuit board wet due to misaligned overflow
tube?
• Is water in overflow cup activating float switch?
• Is overflow cup not making good contact with tank?
• Is dispenser being operated with panels removed?
O
N
C
A
U
T
IO
N
!
F
a
i
l
u
r
e
T
o
C
o
m
p
l
y
V
o
i
d
s
W
a
r
r
a
n
t
y
!
H
ot W
a
te
r S
y
stem
s
–
W
ate
r Ta
nk W
ill Fill
Au
tom
a
tically W
h
e
n U
n
it Is C
on
necte
d To
Po
w
er
!
C
offe
e B
re
w
ers
– Fill Th
e W
a
te
r Ta
nk In
Acco
rdan
ce
W
ith Th
e
In
stalla
tion
Instru
ction
s!
DO NO
T
Turn O
n The Tank Heater Switch
Until Wa
ter Comes From
Op
ened F
aucet!
W
O
N
OFF
O
N
STOP
R
E
A
D
N
O
T
I
C
E
D
I
S
C
O
N
N
E
C
T
F
R
O
M
P
O
W
E
R
S
O
U
R
C
E
B
E
F
O
R
E
R
E
M
O
V
A
L
O
F
A
N
Y
P
A
N
E
L
O
R
R
E
P
L
A
C
E
M
E
N
T
O
F
A
N
Y
C
O
M
P
O
N
E
N
T
!
WARNING
!
O
N
C
A
U
T
IO
N
!
F
a
i
l
u
r
e
T
o
C
o
m
p
l
y
V
o
i
d
s
W
a
r
r
a
n
t
y
!
H
o
t W
ate
r S
y
s
tem
s
–
W
ate
r T
a
nk W
ill Fill
A
uto
m
a
tic
ally
W
h
e
n U
n
it Is C
on
n
ec
ted
T
o P
o
we
r!
C
o
ffe
e B
re
w
e
rs
–
F
ill T
he
W
at
er Ta
n
k In
A
cc
orda
nc
e
W
it
h T
he
Insta
llat
ion
In
stru
ctio
n
s!
DO
N
O
T
T
urn On Th
e Ta
nk He
ater Sw
itch
Until W
ater C
om
es F
rom
O
pen
ed Fauce
t!
HAZARDOUS
VOLTAGE
DISCONNECT FROM
POWER SOURCE
BEFORE REMOVING!
WARNING
O
N
OFF
ON
STOP
R
E
A
D
N
O
T
I
C
E
F
i
l
l
w
a
t
e
r
t
a
n
k
b
e
f
o
r
e
t
u
r
n
i
n
g
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o
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t
h
e
r
m
o
s
t
a
t
o
r
c
o
n
n
e
c
t
i
n
g
a
p
p
l
i
a
n
c
e
t
o
p
o
w
e
r
s
o
u
r
c
e
.
D
o
n
o
t
u
s
e
n
e
a
r
c
o
m
b
u
s
t
i
b
l
e
s
.
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o
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i
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.
(
B
O
C
A
)
a
n
d
t
h
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F
o
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v
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E
N
T
!
WARNING
!
The check valve, electronic control assembly, safety
overflow switch, solenoid valve, overflow tube tem-
perature sensor and terminal block are located at the
rear of the dispenser. Access is gained by removing
the upper and lower rear panels. The upper is attached
with six 8-32 slotted-head screws. The lower is attached
with four 8-32 slotted-head screws. The middle panel
must not be removed from the dispenser.
O
N
C
AUTION
!
F
a
ilu
r
e
T
o
C
o
m
p
l
y
V
o
id
s
W
a
r
r
a
n
t
y
!
H
o
t
W
a
t
e
r
S
y
s
te
m
s
–
W
a
te
r
Ta
n
k
W
il
l
F
i
ll
A
u
t
om
a
ti
c
al
ly
W
h
e
n
U
n
i
t I
s
C
o
n
n
e
ct
e
d
T
o
P
o
w
e
r!
C
o
ff
e
e
B
r
e
w
e
rs
–
F
i
ll
T
h
e
W
at
e
r
T
a
n
k
In
A
c
c
o
rd
an
c
e
W
i
t
h
T
h
e
I
ns
ta
ll
at
i
on
I
n
s
tr
u
cti
o
n
s!
DO NOT
T
urn On The Tan
k Heater Switch
Until Water Comes From Opened Fau
cet!
H
A
Z
A
R
D
O
U
S
V
O
L
T
A
G
E
D
I
S
C
O
N
N
E
C
T
F
R
O
M
P
O
W
E
R
S
O
U
R
C
E
B
E
F
O
R
E
R
E
M
O
V
I
N
G
!
W
AR
N
ING
O
N
O
FF
ON
S
TO
P
R
E
A
D
N
O
T
I
C
E
F
i
ll
w
a
t
e
r
t
a
n
k
b
e
f
o
r
e
t
u
r
n
i
n
g
-
o
n
t
h
e
r
m
o
s
t
a
t
o
r
c
o
n
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c
t
in
g
a
p
p
l
ia
n
c
e
t
o
p
o
w
e
r
s
o
u
r
c
e
.
D
o
n
o
t
u
s
e
n
e
a
r
c
o
m
b
u
s
t
i
b
l
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s
.
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o
l
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o
w
n
a
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n
a
l
/l
o
c
a
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e
c
t
r
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o
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s
.
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l
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t
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ic
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s
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C
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W
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RNING
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to
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o
m
p
ly
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e
B
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P
lu
m
b
in
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C
o
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B
u
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is
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c.
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a
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M
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a
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is
tra
tio
n
(F
D
A
)
.
P1770
P1770
P1770
10420 011599
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