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
or
in
wall
thermostat
mode
.
Check
section
on
dipswitch
settings
to
verify
dipswitches
are
set
properly
.
●
Unit
may
be
in
a
protection
or
diagnostic
failure
mode
.
See
section
on
diagnostic
codes
.
●
●
●
●
●
●
●
●
●
●
●
DISPLAY
HAS
STRANGE
NUMBERS
/
CHARACTERS
ON
IT
UNIT
MAKING
NOISE
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
dipswitch
settings
.
on
Unit
air
filters
are
dirty
.
Room
is
excessively
hot
or
cold
when
unit
is
started
Vent
door
left
open
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
.
WATER
DRIPPING
OUTSIDE
WATER
DRIPPING
INSIDE
Wall
sleeve
is
not
installed
level
ICE
OR
FROST
FORMS
ON
INDOOR
COIL
Low
outdoor
temperature
Dirty
filters
COMPRESSOR
PROTECTION
Power
may
have
cycled
,
so
compressor
is
in
a
restart
protection
.
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
(
bottom
right
button
on
keypad
).
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
.
Allow
sufficient
amount
of
time
for
unit
to
heat
or
cool
the
room
.
Start
heating
or
cooling
early
before
outdoor
temperature
,
cooking
heat
or
gatherings
of
people
make
room
uncomfortable
.
Close
vent
door
.
Check
dipswitch
settings
for
desired
comfort
.
Wait
approximately
3
minutes
for
compressor
to
start
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
.
Wall
sleeve
must
be
installed
level
for
proper
drainage
of
condensation
.
Check
that
installation
is
level
and
make
any
necessary
adjustments
.
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
.
Remove
and
clean
filters
.
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
compressor
run
time
of
3
minutes
●
●
●
●
●
diagnostic
codes
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
-
17
-
Summary of Contents for VTAC
Page 1: ...INSTALLATION OPERATION SERVICE MANUAL VTAC VTACDC...
Page 19: ...160421_V 01...
