2
GB
Possible failures and troubleshooting
P
r
oblem
S
c
r
ee
n
d
ispl
a
y
ELC
B
l
a
mp
(i
f an
y)
He
at
i
ng
I
co
n
c
h
ecki
ng a
c
t
io
n
s
OFF
OFF
OFF
1)
M
a
k
e s
u
re
p
ower s
upp
lier is a
v
aila
b
le,
by
chec
k
in
g
ho
u
se
p
ower s
upp
l
y
v
olta
g
e;
1)
M
a
k
e s
u
re the water heater is t
u
rne
d
ON,
by
p
ressin
g
ON/OFF
bu
tton;
2
)
M
a
k
e s
u
re
p
ro
du
ct is not in col
d
water
m
o
d
el (all
3
p
ersonal
m
o
d
el icons o
ff
m
eans that the
p
ro
du
ct is in col
d
water
m
o
d
el
)
3)
M
a
k
e s
u
re water
p
i
p
e connection is ri
g
ht (inlet on ri
g
ht,
o
u
tlet on le
f
t
).
ON
ON
ON
1)
M
a
k
e s
u
re the wate
f
low rate is not too
b
i
g
(o
v
er
6L
/
m
in
)
,
by
re
du
cin
g
the
f
low rate thro
ug
h water
v
al
v
e
re
gu
lation;
ON
OFF
OFF
1)
M
a
k
e s
u
re the "test"
bu
tton is not
m
ista
k
enl
y
p
resse
d
,
by
p
ressin
g
the "reset"
bu
tton
.
--only for models with ELCB.
d
is
p
la
y
"E*"
ON
OFF
1)
Sto
p
to
u
se water heater, call ser
v
ice technician
.
/
Blin
k
in
g
/
1)
Sto
p
to
u
se water heater, call ser
v
ice technician
.
1)
M
a
k
e s
u
re te
mp
erat
u
re settin
g
is not too s
m
all,
by
choosin
g
hi
g
her te
mp
erat
u
re settin
g.
2
)
M
a
k
e s
u
re the wate
f
low rate is not too
b
i
g
(o
v
er
6L
/
m
in
)
,
by
re
du
cin
g
the
f
low rate thro
ug
h water
v
al
v
e
re
gu
lation;
i
f
f
low rate too
b
i
g
, the o
u
tlet te
mp
erat
u
re in
d
icate
d
on
screen
du
rin
g
heatin
g
will not
b
e a
b
le to reach the settin
g
te
mp
erat
u
re
.
3)
M
eas
u
rin
g
the act
u
al
v
olta
g
e WHEN heatin
g
to
m
a
k
e
s
u
re
v
olta
g
e
d
ro
p
not too
b
i
g.
B
y
increasin
g
sectional area o
f
, or re
du
cin
g
len
g
th o
f
the
p
ower s
upp
l
y
ca
b
le co
u
l
d
i
mp
ro
v
e the
p
ro
b
le
m.
4
)
M
a
k
e s
u
re
p
ower s
upp
lier
v
olta
g
e not too s
m
all,
by
chec
k
in
g
ho
u
se
p
ower s
upp
l
y
WITHOUT heatin
g.
ON
ON
OFF
ON
Water col
d
, no
te
mp
increase
(Flow rate
nor
m
al
)
Water te
mp
increase
d
,
bu
t
not war
m
eno
ug
h
ON
ON