Troubleshooting
Guide
20|
Page
e.
Test
the
heater.
6)
The
water
control
valve
may
need
to
be
replaced
if
the
valve
cannot
be
cleaned.
Contact
the
technical
service
department.
ERROR
CODE
661:
ABNORMAL
WATER
BYPASS
FAULT
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
bypass
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:
PROPORTIONAL
GAS
VALVE
/
COMPUTER
1)
Turn
off
the
power
supply.
2)
The
proportional
valve
is
located
at
the
bottom
of
the
gas
valve
assembly
with
a
red
and
white
wires
connecting
to
it.
3)
Check
all
wire
connections
and
make
sure
they
are
secure
and
free
of
burns
or
cuts.
4)
Inspect
the
PCB
for
connection/breakage
of
wires
and/or
burn
marks
on
the
board.
5)
Verify
that
supply
gas
pressure
is
within
specifications.
6)
Contact
the
technical
service
department
for
further
assistance.
ERROR
CODE
711:
HI
‐
LIMIT
SWITCH
/
OVERHEAT
CUTOFF
FUSE
COMPROMISED
This
error
code
may
appear
instead
of
the
“111”
or
“121”
error
codes.
1)
Check
the
Hi
‐
Limit
switch
a.
Visual
inspection:
Connection/breakage
of
wires.
b.
Normal:
Less
than
1
Ω
between
blue
&
blue
2)
Overheat
Cutoff
switch
compromised
a.
Visual
inspection:
Connection/breakage
of
wires.
b.
Normal:
Less
than
1
Ω
between
blue
&
blue
c.
Check
for
continuity.
See
the
Troubleshooting:
General
Procedure
section
for
instructions.
3)
PCB
and/or
gas
valve
fault
a.
Driving
circuit
fault
for
gas
solenoid
valve.
Inspect
the
PCB
connection
of
the
gas
valve.
Figure
21
Figure
22
