•
BURNER OPERATES
IN
REPETITIVE
RUN/STOP
CYCLE
:
This
is
normal
if
flow
is
low.
This
unit
is
being controlled
by
micro-processor
to
maintain steady
outlet
temperature.
•
WHITE VAPOR RISING
FROM
FLUE
(IN
WINTER)
Vapor
in
exhaust
gas
could
turn
into
droplets
in
winter,
which
may
come
out
from
flue
in
the
form
of
white
vapor.
•
UNIT
OCCASIONALLY DISPLAYS
AN
ERROR
CODE
"4"
AFTER REFILLING FUEL
TANK
:
Error
code
"4" may
start blinking,
a
sign
of air
being
in
fuel supply pipe after
filling
a
empty fuel tank.
Follow
the
procedure provided
on
page
5 for air
purge. Then,
set the hot
water supply
temperature
adjustment
on the
control
panel
on
"High".
Fully open
the
water supply
valve,
and
press
"Power" switch once again. Allow unit
to run for
10
to
15
minutes after
it
moves
into
"Continuous Operation" mode
to
make sure
that
there
is no air
remaining
in
pipe.
Do not
allow fuel tank
to
become empty.
•
ONLY LUKEWARM WATER
IS
SUPPLIED
IN THE
BEGINNING
:
This
can
happen especially
in
winter
or
when
the
unit
that
has
been
installed
with
a
long
hot
water supply
piping
arrangement. When standing water
in
pipe
is
purged,
the
temperature
of hot
water
will
become
constant.
DETECTION
OF
TROUBLES
BY
READING CODE INDICATOR
:
1.
Code
indicators
on
control panel
can
tell
where trouble
is.
2.
If
service
of
your local
dealer
is
needed, provide information
on
code
signs.
(
CODE SIGNS
)
"
4
"
Burner does
not
ignite.
Flames stall occasionally.
Cds has a
broken wire.
(Refer
to
page
5)
"
5
"
Faulty
flames
or
shortcircuited Cds.
"
6
"
A
broken wire
on
detection water
thermistor.
11
7
"
Hot
water supply
high
limit
was
activated.
(PCS
malfunction).
Thermistor
has
electrical
short.
"
8
"
Hot
water supply
high
limit
shut
off was
activated.
(194°F
—
Thermo over heat
protector)
"
9
"
Hot
water temperature adjustment
control
has
malfunctioned.
"
E
"
Communications
circuit
in
trouble.
"
H
"
Main
PCB has
problem
"
P
"
Fan
motor
has
problem
and
fails
to
turn.
(might
be
caused
by
extreme windy condition)
For all of the
above,
please
contact your
local
dealer.
-15-
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