Troubleshooting
43
│
Page
T
‐
H2
‐
SV/T
‐
H2
‐
OS
ERROR
CODES
•
T
‐
H2
‐
DV/T
‐
H2
‐
OS
units
are
self
diagnostic
for
safety
and
convenience
when
trouble
shooting.
•
If
there
is
a
problem
with
the
installation
or
the
unit,
it
will
display
a
numerical
error
code
on
the
3
‐
digit
7
‐
Seg.
LED
on
the
computer
board
(visible
through
a
window
on
the
front
cover)
or
TM
‐
RE30
(if
installed)
to
communicate
the
source
of
the
problem.
•
Consult
the
table
on
the
following
page
for
the
cause
of
each
error
code.
‐
Single
unit
installations
‐
The
7
‐
Seg
LED
and
TM
‐
RE30
displays
the
whole
3
‐
digit
error
code.
Example:
If
your
unit
has
the
“321”
error
code
(inlet
thermistor
failure)
•
Water
heater:
It
will
display
“321”
on
the
7
‐
Seg
LED.
•
TM
‐
RE30:
It
will
display
“321”
on
its
screen.
‐
Easy
‐
Link
system
‐
The
7
‐
Seg
LED
of
the
individual
unit
with
the
error
in
question
displays
the
whole
3
‐
digit
error
code.
The
TM
‐
RE30
(if
installed)
displays
a
3
‐
digit
number
which
signifies
which
unit
has
the
error,
and
what
the
error
code
is.
Example:
If
Unit
#2
has
the
“321”
error
code
(inlet
thermistor
failure)
•
Water
heater
#2:
It
will
display
“321”
on
the
7
‐
Seg
LED,
just
like
in
the
Single
Unit
example.
•
TM
‐
RE30:
It
will
display
“232”
on
its
screen.
The
first
“2”
indicates
that
Unit
#2
has
the
error.
The
“32”
indicates
the
first
two
digits
of
the
“321”
error
code.
Error
code
on
the
computer
board
7
‐
Seg
LED
Error
code
on
the
TM
‐
RE30
TM
‐
RE30
Unit
#1
MASTER
unit
Unit
#2
SLAVE
unit
Unit
#3
SLAVE
unit
Unit
#4
SLAVE
unit
