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TROUBLESHOOTING
POSSIBLE
CAUSES
SOLUTIONS
UNIT
DOES
NOT
START
e
Unit
may
have
become
unplugged
e
Fuse
may
have
blown
e
Circuit
breaker
may
have
been
tripped
e
Unit
may
be
off
or
in
wall
thermostat
mode.
Check
section
on
dipswitch
settings
to
verify
dipswitches
are
set
properly.
e
Unit
may
be
in
a
protection
or
diagnostic
failure
mode.
See
section
on
Intelligent
Self—checking
Control.
e
Check
that
plug
is
plugged
securely
in
wall
receptacle.
Note
:Plug
has
a
test/reset
button
on
it.
Make
sure
that
the
plug
nas
not
tripped.
*
Replace
the
fuse.
See
Note
1.
*
Reset
circuit
breaker.
See
Note
1.
e
Turn
unit
on
(bottom
right
button
on
keypad).
Note:
If
the
unit
turns
on,
the
LED
will
be
green.
If
the
unit
is
off,
the
LED
will
be
red.
If
there
is
no
LED
on,
there
is
a
problem
with
power
or
damage
to
the
control.
UNIT
NOT
COOLING/HEATING
ROOM
e
Unit
air
discharge
section
is
blocked
e
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
dipswitch
settings.
e
Unit
air
filters
are
dirty.
e
Room
is
excessively
hot
or
cold
when
unit
is
started.
e
Vent
door
left
open
e
Unit
may
be
in
a
protection
or
diagnostic
failure
mode.
Check
section
on
Intelligent
Self—checking
Control.
«
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
compressor
overload.
e
Make
sure
that
curtains,
blinds
or
furniture
are
not
restricting
or
blocking
unit
airflow.
e
Reset
to
a
lower
or
higher
temperature
setting.
e
Remove
and
clean
filters.
e
Allow
sufficient
amount
of
time
for
unit
to
heat
or
cool
the
room.
Start
heating
or
cooling
early
before
outdoor
temperature,
cooking
neat
or
gatherings
of
people
make
room
uncomfortable.
«
Close
vent
door.
e
Check
dipswitch
settings
for
desired
comfort.
Wait
approximately
3
minutes
for
compressor
to
start
DISPLAY
HAS
STRANGE
NUMBERS/CHARACTERS
ON
IT
e
The
unit
may
be
in
a
diagnostic
condition.
Check
Intelligent
Self—
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
UNIT
MAKING
NOISES
e
Clicking,
gurgling
and
whooshing
noises
are
normal
during
operation
of
unit.
WATER
DRIPPING
OUTSIDE
e
if
a
drain
kit
has
not
been
installed,
condensation
runoff
during
very
hot
and
humid
weather
is
normal.
See
Note
2.
If
a
drain
kit
has
been
installed
and
is
connected
to
a
drain
system,
check
gaskets
and
fittings
around
drain
for
leaks
and
plugs.
WATER
DRIPPING
INSIDE
e
Wall
sleeve
is
not
installed
level
*
Wall
sleeve
must
be
installed
level
for
proper
drainage
of
condensation.
Check
that
installation
is
level
and
make
any
necessary
adjustments.
ICE
OR
FROST
FORMS
ON
INDOOR
COIL
*
Low
outdoor
temperature
e
Dirty
filters
*
When
outdoor
temperature
is
approximately
55°F
(12.8°C)
or
below,
frost
may
form
on
the
indoor
coil
when
unit
is
in
Cooling
mode.
Switch
unit
to
FAN
operation
until
ice
or
frost
melts.
e
Remove
and
ciean
filters.
COMPRESSOR
PROTECTION
*
Power may
have
cycled,
so
compressor
is
ina
restart
protection.
e
Random
Compressor
restart
—
Whenever
the
unit
is
plugged
in,
or
power
has
been
restarted,
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
and
a
minimum
co™
pressor
run
time
of
3
minutes.
WALL
THERMOSTAT
PROBLEM
e
Verify
wiring
is
correct
between
thermostat
and
unit.
e
Dip
Switch
settings
are
only
read
during
power
up.
Unplug
unit
and
verify
Dip
Switch
Settings,
then
plug
in
unit.
NOTES:
1.
If
circuit
breaker
is
tripped
or
fuse
is
blown
more
than
once,
contact
a
qualified
electrician.
2.
If
unit
is
installed
where
condensation
drainage
could
drip
in
an
undesirable
location,
an
accessory
drain
kit
should
be
installed
and
connected
to
drain
system.
18
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