TROUBLESHOOTING
POSSIBLE
CAUSES
UNIT
DOES
NOT
START
●
Unit
may
have
become
unplugged
●
Fuse
may
have
blown
●
Circuit
breaker
may
have
been
tripped
●
Unit
may
be
off
at wall
thermostat
.
●
Unit
may
be
in
a
protection
or
diagnostic
failure
mode
.
See
section
on
diagnostic
codes
.
●
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●
DISPLAY
HAS
STRANGE
NUMBERS
/
CHARACTERS
ON
IT
UNIT
MAKING
NOISES
UNIT
NOT
COOLING
/
HEATING
ROOM
Unit
air
discharge
section
is
blocked
Temperature
setting
is
not
high
or
low
enough
Note
:
Setpoint
limits
may
not
allow
the
unit
to
heat
or
cool
the
room
to
the
temperature
desired
.
Check section
on
temperature limiting in wall thermostat manual
.
Unit
air
filters
are
dirty
.
Room
is
excessively
hot
or
cold
when
unit
is
started
Vent
door
open
Unit
may
be
in
a
protection
or
diagnostic
failure
mode
.
WATER
DRIPPING
OUTSIDE
WATER
DRIPPING
INSIDE
Wa
not
installed
level
ll
plenum
is
ICE
OR
FROST
FORMS
ON
INDOOR
COIL
Low
outdoor
temperature
Dirt
rs
y
air
filte
COMPRESSOR
PROTECTION
Compressor operation may have been interrupted,
so
compressor
is
in
a
restart
delay.
SOLUTIONS
Check
that
plug
is
plugged
securely
in
wall
receptacle
.
Note
:Plug has a test/reset button on it. Make sure that the
plug
has
not
tripped
.
Replace
the
fuse
.
Reset
circuit
breaker
.
Turn
unit
on
to
heating
or
cooling
mode
wall
at
The
unit
may
be
in
a
diagnostic
condition
.
Check
--- checking Control section to determine
if
unit
has
had
a
failure
.
The
unit
may
be
set
for
°
C
(
instead
of
°
F
),
see
the
keypad
configuration
section
Clicking
,
gurgling
and
whooshing
noises
are
normal
during
operation
of
unit
.
Make
sure
that
curtains
,
blinds
or
furniture
are
not
restricting
or
blocking
unit
airflow
.
Reset
to
a
lower
or
higher
temperature
setting
.
Remove
and
clean
filters
.
Start
heating
or
cooling
early
before
outdoor
temperature
,
cooking
heat
or
gatherings
of
people
make
room
uncomfortable
.
Close
vent
door
.
Check
section
on diagnostic codes.
Wait
approximately
3
minutes
for
compressor
to
start
If
d
,
condensation
an internal drain system has
not
been
installe
run off
to
the
outdoors
during
very
hot
and
humid
weather
is
normal
.
The external drain tube will discharge the condensate out
beyond the real louver.
Wall
ust
be
installed
for
proper
drainage
of
plenum
m
condensation
.
Check
that
installation
is
properly leveled
according
to installation instructions an
d
make
any
necessary
adjustments
.
Random
Compressor
restart
—
Whenever
the
unit
is
plugged
in
,
or
power
has
been
restored
a
random
compressor
restart
will
occur
.
After
a
power
outage
,
the
compressor
will
restart
after
approximately
3
minutes
.
Compressor
Protection
— To prevent short cycling of the
compressor
,
there
is
a
random
startup
delay
of
3
minutes
.
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●
diagnostic
codes
●
●
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●
Remove
then
clean
or replace air filters as applicable.
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-
17
-
thermostat system switch.
Compressor is in time delay. There is a protective time delay
(approx . 3 minutes) on starting the compressor after a power
outage (or restarting after it has been turned off ), to prevent
tripping of the compress or overload.
