DIAGNOSTIC
MAINTENANCE
&
STATUS
REPORT
The
Diagnostic Maintenance & Status Report provides detailed
information
on
PTAC
control operation
and
operational status
including present
modes,
failures, airflow restriction warnings,
operating temperatures,
and
past failures. The lower right
hand
dot
on
the center display flashes
in
this mode.
In
some
cases
the green
LED
located in the lower
left
hand corner
of
the
touchpad below the
OFF
key
will
also be
lit.
This Green
LED
"Status Light" only illuminates
if
there is
an
status code
that
has
been
activated
and
should
be
reviewed.
In
most
cases,
this light
indicates
that
the indoor room
filter
is
dirty
should
be
cleaned
or
replaced.
NOTE:
Dirty filters cause
the
unit
to
consume more
energy than normally needed
to
condition a room. Once the
filter
has
been cleaned or replaced, the
LED
should
go
out.
If
the
LED
is
still
illuminated
after
the
filter
has
been cleaned,
activate the Diagnostic
and
Status mode
to
view
any
active
codes. The unit
may
need additional cleaning
or
maintenance
of
the evaporator or condenser coils. Please perform this step
before calling a servicer. A servicer should be called
only
if
cleaning
the
filter
or
coils does
not
clear
the
status code
or
the
code indicates
that
servicer should be called.
DIAGNOSTIC
STATUS REPORT
MODE.
To enter Diagnostic Status Report mode, press and hold
the
8
up and
down
Warrows
and,
while
holding,
quickly
press
the
COOL
key
~
~1.11
twice.
ACTIVE
FAILURES.
•
If
there are
no
active failures or lockouts, the display
will
show a double
dash,
"-
-".
If
there is a
code
listed,
see
the unit "Diagnostic
Codes"
chart for a list
ofdefi-
nitions.
OPERATING
TEMPERATURES.
• If not
in
Diagnostic
Status
Report
Mode,
enter
as
instructed
above
and
press
the
Fan
Speed
[
J:,
~
key.
• If already
in
Diagnostic Status Report mode,
press
the
Fan
Speed
[
.::.
II
key.
The
display
will
show
the tem-
perature
of
the desired set point,
SP;
the temperature at
the wireless thermostat, rL; the indoor ambient tempera-
ture behind the filter,
IA;
the indoor coil temperature,
IC;
the indoor discharge air temperature, Id; the outdoor
coil temperature,
OC;
the outdoor ambient temperature,
OA;
and
the spare probe temperature,
IH.
If
any
of
the
probes are not populated the display
will
show
the corre-
sponding failure code.
PAST
FAILURE
LOG
•
If
not
in
Diagnostic Status Report
Mode,
enter
as
instructed
above
and
press
the
Fan
Speed
[
J:,
~
key
twice.
•
If
already in Diagnostic Status Report mode,
press
the
Fan
Speed
[ :;:;,
II
key.
While the display is showing oper-
ating temperatures, the last
10
failure
codes
active
or
past can
be
requested
by
pressing the
Fan
Speeq
[ .::.
~
key again. The codes are displayed last entry
first
fol-
lowed subsequently by
each
preceding code.
Note
that
modes
F1
and
Fd are also displayed
in
the
normal
control
operation
(see
"Diagnostic Codes"
chart).
To
exit
Diagnostic Status Report mode, press the
OFF
(loll?
I)
key.
16
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