Troubleshooting
Guide
4|
Page
2.
INTRODUCTION
This
manual
provides
the
necessary
information
for
troubleshooting
the
110
(T
‐
KJr2),
310
(T
‐
K4),
510
(T
‐
D2)
tankless
water
heaters.
It
will
be
effective
in
helping
your
troubleshooting
needs
as
long
as
the
instructions
are
followed
in
the
intended
order.
Here
is
how
to
use
this
manual:
•
First
refer
to
the
Installation
Manual
as
the
primary
source
of
information.
Refer
to
it
along
side
this
manual
throughout
the
troubleshooting
process.
•
Before
troubleshooting,
if
you
are
unfamiliar
with
how
a
tankless
unit
operates,
read
the
Normal
Operation
section
(p.
5).
•
To
double
‐
check/troubleshoot
a
new
installation,
use
the
Proper
Installation
section
(p.
6).
•
When
beginning
troubleshooting,
first
go
through
the
Preliminary
Checklist
(p.
7);
it
is
designed
to
fix
the
most
common
and
frequent
problems,
and
provide
you
with
background
information
to
help
narrow
down
the
information
you
need.
•
After
the
Preliminary
Checklist,
move
to
the
Error
Codes
section
(p.
12)
if
you
have
received
an
error
code,
or
to
General
Problems
(p.
8)
if
you
have
not
received
an
error
code.
If
you
have
any
problems
or
questions
regarding
this
equipment,
or
at
any
point
become
confused
or
uncomfortable
with
any
of
the
procedures,
consult
with
the
technical
service
department
or
service
agent.
IMPORTANT
•
Installation
and
service
must
be
performed
by
a
qualified
installer
(for
example,
a
licensed
plumber
or
gas
fitter).
Otherwise
the
warranty
will
be
void.
•
The
installer/service
agent
(licensed
professional)
is
responsible
for
correctly
installing
or
servicing
your
water
heater
and
for
compliance
with
all
national,
state/provincial,
and
local
codes.
*
For
all
units
installed
in
the
state
of
Massachusetts,
it
is
required
that
the
installer
either
be
a
licensed
plumber
or
licensed
gas
fitter.
GENERAL
INSTALLATION
GUIDELINES
1.
Follow
all
local
codes,
or
in
the
absence
of
local
codes,
follow
the
most
recent
edition
of
the
National
Fuel
Gas
Code:
ANSI
Z223.1/NFPA
54
in
the
USA
or
CAN/CSA
B149.1
Natural
Gas,
Propane
Installation
Code
in
Canada.
2.
Properly
ground
the
unit
in
accordance
with
all
local
codes
or
in
the
absence
of
local
codes,
with
the
National
Electrical
Codes:
ANSI/NFPA
70
in
the
USA
or
CSA
standard
C22.1
Canada
Electrical
Code
Part
1
in
Canada.
3.
Carefully
plan
where
you
intend
to
install
your
water
heater.
4.
Check
the
rating
plate
for
the
correct
GAS
TYPE,
GAS
PRESSURE,
WATER
PRESSURE
and
ELECTRIC
RATING.
*If
this
unit
does
not
match
your
requirements,
do
not
install
.
5.
If
any
problem
should
occur,
turn
off
all
hot
water
taps
and
turn
off
the
gas.
Then
call
a
trained
technician
or
the
gas
company
.
WARNING
RATING
PLATE
Figure
1
