Troubleshooting
Guide
17|
Page
ERROR
CODE
611
[510
(T
‐
D2)],
FOUR
FLASHES/61
[110
(T
‐
KJR2),
310
(T
‐
K4)]
ABNORMAL
FAN
MOTOR
1)
Turn
off
power
supply.
2)
Check
fan
motor
wiring
for
any
breakages,
burn
marks
on
the
PC
board,
or
moisture.
If
moisture
is
found,
allow
connection
to
completely
dry
before
turning
power
back
on.
3)
Check
fan
housing
for
water.
If
found,
please
dry
the
fan,
then
test
heater.
4)
To
remove
the
fan
motor.
a.
Turn
off
the
power
supply.
b.
Move
the
computer
board
out
of
the
way.
c.
Locate
the
two
Phillips
head
screws
fitted
at
the
top
of
the
fan
motor
to
the
combustion
chamber
box.
Two
holes
are
located
directly
at
the
bottom
of
the
case
that
line
up
with
the
two
screws.
Using
an
8”
screwdriver,
remove
the
screws.
d.
Slide
the
fan
out
towards
the
left.
e.
If
signs
of
water
are
evident,
water
may
have
damaged
the
fan
motor
requiring
replacement.
5)
If
the
611
error
code
still
appears
after
all
items
have
been
checked,
the
PCB
may
need
replacement
ERROR
CODE
651
[510
(T
‐
D2)]
ABNORMAL
FLOW
ADJUSTMENT
VALVE
1)
Turn
off
power
supply.
2)
Check
that
all
wire
connections
are
secure
and
free
of
burns.
The
flow
adjustment
valve
is
located
behind
the
computer
board
and
attached
to
the
cold
water
inlet.
3)
Check
for
water
leakage
from
the
valve.
4)
Do
a
visual
inspection
of
the
PCB.
Check
for
connection/breakage
of
wires
and/or
burn
marks
on
the
board.
PCB
may
need
to
be
replaced.
5)
The
flow
adjustment
valve
may
need
to
be
cleaned.
To
remove,
follow
the
steps
below:
a.
Remove
the
four
waterway
clips
on
each
side
of
the
valves.
b.
Slide
the
valve
up
off
the
inlet
water
connection.
c.
Check
both
ends
of
the
valve
for
sediment
or
debris.
Use
a
brush
or
descaling
solution
to
remove
the
sediment.
d.
Re
‐
install
the
valve
and
clips.
e.
Test
the
heater.
6)
The
flow
adjustment
valve
may
need
to
be
replaced
if
the
valve
cannot
be
cleaned.
ERROR
CODE
701
[510
(T
‐
D2)],
ONE
FLASH/70
[110
(T
‐
KJR2),
310
(T
‐
K4)]
COMPUTER
BOARD
FAULT
1)
Turn
off
the
power
supply.
2)
Check
all
wire
connections
and
make
sure
they
are
secure
and
free
of
burns
or
cuts.
3)
Inspect
the
PCB
for
connection/breakage
of
wires
and/or
burn
marks
on
the
board.
4)
Verify
that
supply
gas
pressure
is
within
specifications.
5)
Contact
the
Technical
Service
Department
for
further
assistance.
Figure
13
Figure
14
