Polar Air VTAC Manual

INSTALLATION, OPERATION
& SERVICE MANUAL
VTAC/VTACDC

CONTENTS
OPERATION INSTRUCTIONS 2
CARE AND CLEANING 3
INSTALLATION INSTRUCTIONS 4
16
SERVICING 14
TROUBLESHOOTING
……………………
… …………………………
…………………
ERROR CODES AND SOLUTIONS……………
………………………………………
………………… ………17
-1-
WARNING
1.This unit must be properly installed in
accordance with the Installation Instructions
before it is used.
See the Installation Instructions in the back of
this manual.
2.Replace immediately all electric service cords
that have become frayed or otherwise damaged.
A damaged power supply cord must be replaced
with a new power supply cord obtained from the
manufacturer and not repaired. Do not use a
cord that shows cracks or abrasion damage
along its length or at either the plug or connector
end.
3.Product must be operated with the electrical
plug supplied with the product. Do not replace
the electrical plug supplied with the product.
4.If the receptacle does not match the plug, the
receptacle must be changed out by a qualified
electrician.
5.Unplug or disconnect the unit at the fuse box or
circuit breaker before making any repairs.
NOTE: We strongly recommend that any
servicing be performed by a qualified individual.
6.All air conditioners contain refrigerants which
under federal law must be removed prior to
product disposal. If you are getting rid of an old
product with refrigerants, check with the
company handling disposal about what to do.
These R410A Air Conditioner Systems require
contractors and technicians to use tools,
equipment and safety standards approved for
use with this refrigerant. Do not use equipment
certified for R22 refrigerant only.
7.
RECOGNIZE THIS SYMBOL AS
A SAFETY PRECAUTION
WARNING
HIGH VOLTAGE
Disconnect all power before servicing or installing
this unit. Multiple power sources may be present,
failure to do so may cause property damage, personal
injury or death.
The manufacturer will not be responsible for any injury or
property, damage arising from improper service or service
procedures. If you install or perform service on this unit, you
assume responsibility for any personal injury or property
damage which may result, many jurisdictions
require a license to install or service heating and air
conditioning equipment.
WARNING
WARNING
Risk of electric shock can cause injury or death. For
your safety, the information in this manual must be followed
to minimize the risk of fire, electric shock or personal injury.
The following warnings are very important
for safety. Please read them carefully
before installation!

OPERATION INSTRUCTIONS
-2-
To access the control- terminal connections, remove
the front case panel by removing the filter, taking
out the four front screws, the upper two screws from
the top of the panel and the shipping screws on each
side, if present. (Discard the four side shipping
screws, if present).
Controls-terminal connections
R FD GH B Y W GL C
Red-24VAC
Purple-LS control
Green-High fan speed
Blue-Reversing valve
Yellow-Compressor
White-Heater
Orange-Low fan speed
Black-Common ground
side
shipping
screws
side
shipping
screws
ON/OFF switches
The unit on/off switch is located on the front of
the unit.
To turn on the unit, push the on/off switch up.
To turn off the unit,
WARNING: The on/off switch will remove
power from the unit but the power cord
terminals will still be live. You must disconnect
power by unplugging power cord prior to
servicing.
push the on/off switch down.
ON/OFF
Switch
Details of terminals
Red-24VAC terminal
For obtaining 24VAC operating voltage from the unit
Purple-LS terminal
Turn ON unit: connect R terminal to LS terminal then release for one
time within 5 seconds.
Turn OFF unit: connect R terminal to LS terminal then release for
two times within 5 seconds.
Force shut down: connect R terminal to LS terminal for over 5
seconds.
Note: After force shut down, you can turn the unit ON again by
handheld remote controller or the control panel.
Green-high fan speed terminal
When this terminal is connected to the R terminal, the fan blower will
run on high speed.
Blue-reversing valve terminal
When this terminal is connected to the R terminal, the reversing
valve is energized. Should the compressor be locked out
or disabled, the electric heater shall provide backup.
Yellow-compressor terminal
When this terminal is connected to the R terminal, the compressor
will be switched on (Green-high fan speed or Orangelow
fan speed terminals must also be connected to the R terminal as
well.)
White-heater terminal
When this terminal is connected to the R terminal, electric heater will
be switched on (Green-high fan speed or Orangelow
fan speed terminals must also be connected to the R terminal.)
Orange-low fan speed terminal
When this terminal is connected to the R terminal, the fan blower will
run on low speed.
Black-common terminal
24VAC common to provide opposite polarity voltage to wall
thermostat.

CARE AND CLEANING
Turn off the Unit and disconnect the power supply before cleaning
-3-
Air Filters
To maintain optimum performance, change
the filter at least every 30 days. The most
important thing you can do to maintain the
unit is to change the filter at least every 30
days. Dirty filters reduce cooling, heating and
air flow.
Changing the filter will: Decrease cost of
operation, save energy, prevent clogged heat
exchanger coils and reduce the risk of
premature component failure.
NOTICE:
Do not operate the unit without the filter in
place. If a filter becomes torn or damaged, it
should be replaced immediately.
Operating without the filter in place or with a
damaged filter will allow dirt and dust to
reach the indoor coil and reduce the cooling,
heating airflow and efficiency of the unit.
Replacement filters should be purchased
from your local retailer where air conditioner
and furnace accessories are sold.
Filter size required is 20"x 20"x1".
Remove filter
Unit-mounted filter
To remove
and replace
the filter:
Indoor/Outdoor Coils
The exhaust coils on the unit should be
checked regularly. If they are clogged with
dirt or soot, they may be professionally steam
cleaned. You will need to remove the unit
from the case to inspect the coils because
the dirt build-up occurs on the exhaust side.
outdoor coils
Have the coils been cleaned regularly
Drain
Clean the drain system regularly to prevent
clogging.
Base Pan
In some installations, dirt or other debris may
be blown into the unit from the outside and
settle in the base pan at the bottom of the unit. In
some areas of the United States , a
"gel-like" substance may be present in the
base pan.
Check it periodically and clean, if necessary.

INSTALLATION INSTRUCTIONS
BEFORE YOU BEGIN
Read these instructions completely and carefully.
IMPORTANT - Save these instructions for
local inspector's use.
IMPORTANT - Observe all governing codes
and ordinances.
Note to Installer - Be sure to leave these
instructions with the owner.
Note to Owner - Keep these instructions for
future reference.
Proper installation is the responsibility of the
installer.
Product failure due to improper installation is
not covered under the Warranty.
You MUST use all supplied parts and use
proper installation procedures as described
in these instructions when installing this air
conditioner.
WARNING
RISK OF ELECTRIC SHOCK.
Can cause injury or death. This appliance
must be properly grounded. Where a 2-
prong wall outlet is encountered, it is
your responsibility and obligation to
h a v e i t r e p l a c e d w i t h a p r o p e r l y
grounded 3-prong outlet.
IMPORTANT ELECTRICAL
SAFETY-READ CAREFULLY
WARNING
RISK OF ELECTRIC SHOCK.
All ele ctr ical co nne ction s and
w i r i n g M U S T b e i n s t a l l e d b y a
qualified electrician.
Follow the National Electrical Code
( N E C ) a n d / o r l o c a l c o d e s a n d
ordinances.
For personal safety, this unit and
case must be properly grounded.
Protective devices (fuses or circuit
b r e a k e r s ) a c c e p t a b l e f o r u n i t
installations are specified on the
nameplate of each unit.
Do not use an extension cord with
this unit.
Aluminum building wiring may
present special problems - consult a
qualified electrician.
When the unit is not running there
is sti l l v olta g e t o t he elec t rica l
controls.
Disconnect the power to the unit
before servicing by:
1. Removing the power cord (if it
has one) from the wall receptacle.
OR
2. Removing the branch circuit
fuses or turning the circuit breakers
off at the panel.
This air conditioner is not meant to provide
unattended cooling or life support for
persons or animals who are unable to react
to the failure of the product. The failure of an
unattended air conditioner may result in
extreme heat in the conditioned space
causing overheating or death.
WARNING
-4-

INSTALLATION INSTRUCTIONS
Electrical Requirement
WARNING
To avoid the risk of property damage,
personal injury or fire, use only copper
conductors.
To avoid property damage, personal injury
or death due to electrical shock, do not use
an extension cord with this unit.
WARNING
To avoid the risk of property damage,
personal injury or fire do not install with
power cord stretched or under a strain as
this may create loose plug/receptacle
connection.
WARNING
To avoid the risk of personal injury, wiring
to the unit must be properly polarized and
grounded.
WARNING
-5-
Unit Voltage
Rating Minimum Maximum
230/208 187 253
265 238 292
Operating Voltage
Voltage Utilization Range
Receptacles/Sub-bases
All wiring , including installation of the
receptacle, must be in accordance with the
NEC and local codes ordinances and
regulations.
VOLTAGE MEASUREMENTS
Once the unit is properly wired, measure the unit
supply voltage. Voltage must fall within the
voltage utilization range.
•LCDI Cords-Underwriters Laboratories
and the National Electric Code (NEC) now
require power cords that sense current
leakage and can open the electrical circuit
to the unit on units rated at 250 volts or
less. In the event that unit does not operate,
check the reset button located on or near
the head of the power cord as part of the
normal troubleshooting procedure.
LCDI power Cord
Tandem
230/208V 15Amp Perpendicular
230/208V 20 Amp Large tandem
230/208V 30Amp
265V 15Amp 265V 20 Amp 265V 30Amp
WARNING
Disconnect all power before servicing or
installing this unit as multiple power
sources may be present. Failure to do so
may cause property damage, personal
injury or death. Do not service this unit
without first shutting off the power to
the unit from the circuit breaker and/or
removing the unit cord set plug from the
all wall outlet.
The power cord is located inside the electrical
control box cover for insert mounting.
LCDI Power cord

-6-
Unit Component
Case
Unit
Front Case Panel
Required Accessories
(Check the"Essential Elements"label on the unit.)
Architectural Louver
Cutout
Dimensions:
20" W x 32 1/4"H
Wall Plenum
6"D x 19-3/4 W x 32 H
8"D x 19-3/4"W x"32"H
12"D x 19-3/4"W x 32"H
15"D x 19-3/4"W x 32"H
" "

-7-
Typical Utility Closet And Dimensions
(FOR REFERENCE ONLY)
~2-1/4" ~1"
11-1/2"
10" 10"
duct
3"min.
3"
min. Electrical connection
4" min.
Door/access panel
Thermostat
Connection
Unit
front
Architectural Louver
UNIT INSTALLED THROUGH
FRONT OF CASE
Top View
A
B
A Minimum recommended access door width: 30"
B Minimum recommended access door height : 50"
Option 2
Return air grille
Inside wall
Option 1
Access panel
with return air grille
Rigid
ductwork
Flexible or
rigid duct
Air discharge
outlet
Unit
Wall
plenum
Wall plenum
divider
Drain fittings 3/4"
Filter bracket
Secure platform
to the floor
8"min.
for drain
access
Platform: 23-1/4"x 23-1/4"square Min.
load capacity:175 Ibs.
Outside wall
Plenum
cutout
32-1/4"H
x 20"W
Exterior/Outside
Bottom of case approx.2"
above bottom of plenum
Wall plenum
Bottom of case approx 2”
above bottom of plenum
Platform
Outside wall
Field supplied
outer flashing
•4" min. from front of case - Unit
installed through FRONT of case.
•5" min. from front of case - Unit
installed through SIDE of case.
•3" min. from two sides of case.
(5"for side install).
31"
Side View
2" min
10" max

Utility Closet Connection Locations
-8-
IMPORTANT: Plan and locate plenum, wall plug, drains and thermostat carefully to
avoid interference. Hard-to-reach locations will make installation and service difficult!
Reference Dimensions
A Thermostat cable
B Power cord: 60" long
C Case width and depth: 23-1/8"
D Case height: 31"
E Condensate drains: 3/4"connector
•Primary Drain - Centerline of
cutout is approximately 5-1/4"
from left case wall and 8-1/2" from
back case wall.
•Secondary Drain-centerline of
cutout is approximately 6-1/2"
from left case wall and 5-1/4" from
back case wall.
F Typical wall plug: 6"-12" above case
G Room air sensor kit: 10' long.
H 40" min.
Flex duct may be used
for transitions only
Use rigid duct for
90° bends and tees
Outside wall
G
A
B
CC
D
E
230/208 or
265 VAC
wall receptacle
or conduit for
direct Connection
Platform
F
H
Connecting the
air outlet
Connecting the
air outlet

Return Air Grille Installation Options
The room return air grille may be installed toward the front or either side of the unit.
Improper return air arrangements will cause performance problems.
There are three indoor return air grille installation options. Choose the option that best
suits your installation requirements. Follow the Installation Instructions provided with the return air
grille accessory for installation details. All these options need field supplied accessories.
NOTE: Use only one filter in the installation. The filter may be installed on the unit or in
the access panel/door.
Outside wall
Access panel with return air grille
Filter
Option 1
Return air grille
Filter
Option 2
Unit-mounted filter with a field-supplied return
air grille and access door/panel
Filter
Option 3
-9-

Wall Plenum And Architectural Louver Installation
-10-
•Install the appropriate wall plenum through the exterior wall.The unit itself does not install
in the wall opening, the use of a plenum is necessary to contain and separate the outdoor
air paths. The plenum must be able to hold water in the bottom without leaking into the
wall cavity. It must have a splitter to separate between the return and exhaust air paths.
The wall opening location for the plenum needs to extend 1" below the top of the
installation platform. The plenum is to be installed square and level in opening and
secured to the wall construction with screws or nails in the sides located a minimum of 2"
from the bottom of the plenum. No nails or screws may be used in the bottom of top of the
plenum to ensure against water entering the wall cavity.
IMPORTANT: The wall plenum is not designed to carry structural loads. Proper wall
header construction is required. The plenum requires proper flashing, shim and
caulk for a weather resistant installation.
Architectural
Exterior/Outside Wall Wall Plenum
6"D x 19-3/4"W x 32"H
8"D x 19-3/4"W x 32"H
12"D x 19-3/4"W x 32"H
15"D x 19-3/4"W x 32"H
Case
Left side of platform
23-1/4 "min.
8" min
for
drain
access
NOTE: Specific cutout size
for drain connections needs
to be determined by the installer
for the given installation situation.
23-1/4 "min.
Back of platform
Cutout for drain
Connection(s)
(see NOTE below)
5-1/4"
5-1/4"
6-1/2"
8-1/2"
•Secondary Drain-center line of drain is
approximately 6-1/4"from left platform
edge and 5-1/4"from back platform edge.
(1)Build And Install The Unit
Base Platform
1. Construct a 23-1/4 "min. x 23-1/4 "min. square
platform with legs to raise the platform a
minimum of 8".
NOTE: The platform must have a load-bearing
capacity of 175 lbs. minimum.
2. Make drain hole cutout(s):
•Primary Drain-centerline of drain is
approximately 5-1/4 "from left platform
edge and 8-1/2 "from back platform edge.
3. Place the platform in the utility closet
with the following clearance between it
and the interior surface of the walls/door/
panel:
•4"min. from front of the case
Unit to be installed through FRONT of
case
•5"min. from front of the case
Unit to be installed through SIDE of case
•3"min. from two sides of the case(5"for
side installation)
4. Align the platform with the opening of
the wall plenum and secure to the floor
using appropriate brackets and bolts.
•

-11-
Side View
Inside wall
Female drain
fitting 3/4” PVC
(External drain)
PVC
90° Elbow
(2)Install The Drain(s)
An external or an internal drain must be attached
to the primary drain connector. A secondary drain
is supplied if required by state and local codes.
Refer to the local codes for proper installation of
the drains. If the secondary drain is not used, seal
its drain port with a 3/4"MNPT plug.
External Drain
Attach a 90° PVC elbow to the units female 3/4"NPT
drain connector. Use the other end of the elbow to
run a 3/4 " Sch. 40 PVC pipe through the knockout
holes of both the wall plenum and the architectural
louver to the outside Seal the gap between the
plenum hole and PVC tube. See the installation
instructions in the figure 1.
Side View
Inside wall
Female drain
fitting 3/4"
PVC
(Internal drain)
Internal Drain
Attach PVC to the units female 3/4"NPT drain
connector. See the Installation Instructions
Local codes may apply.
in the
figure 2
figure 1
figure 2
(3)Ductwork
Prepare the closet ductwork for later connection
to the case.
The total flow rate(CFM) and external static
pressure (ESP) available can be estimated from
the chart below.
The collar on top of the case accepts standard
10"duct.Pull all duct tight. Extra duct slack can
greatly increase Static pressure.
NOTICE: Flex duct can collapse and cause
airflow restrictions. Do not use flex duct for 90°
bends or unsupported runs of 5 ft. or more.
Your airflow should be balanced based on many
factors such as available ESP room CFM. and
ductwork. Consult an HVAC engineer for proper
applications. External static pressure ( ESP )
can be measured with a manometer or pitot
tube. Once this ESP is established you can
calculate the CFM use above chart.
High
CFM
Medium
CFM
Medium
CFM
Low
CFM
0.00 550 450 425 410
0.04 515 410 395 375
0.10 465 360 350 320
0.15 440 310 300 270
0.20 405 245 240 205
0.25 365 225 180 120
0.30 310 - 110 -
0.00 585 520 520 450
0.04 550 485 485 410
0.10 505 435 435 360
0.15 470 385 385 310
0.20 430 345 345 245
0.25 390 285 285 225
0.30 340 230 230 -
0.00 585 525 525 510
0.04 550 490 490 475
0.10 530 440 440 420
0.15 505 390 390 375
0.20 470 350 350 320
0.25 430 290 290 250
0.30 390 235 235 180
ON
18K
Airflow -CFM
ESP
(in.water)
09K
12K
Indoor Fan CFM
Duct Select Switch
OFF

-12-
(4)Install And Connect The Case
Inside
wall Rigid
ductwork
Air
discharge
outlet
Leveling legs
1. Remove the front case panel and pull the unit
out of the case. Place the empty case onto the
platform in the closet with the outdoor side facing
the wall plenum opening. Align the case with
plenum opening and attach.
2. Remove the rubble plug from the chassis.
3. Adjust the leveling legs so the case is level
from side to side and from level to 1/4" bubble
tilt to the outdoors.
remove the rubble plug
Secondary 3/4” drain
option. If not used.
seal with a MNPT plug
Primary female
drain fitting 3/4”
Bolt case
to platform
External
drain
OR
Internal
Drain(s)
NOTE: Piping is not
supplied with the unit.
Obtain locally.
4. Using field-supplied screws, bolt the case to the
platform.
5. Connect the internal or external drain(s) as
necessary.
(5a)Install And Ground The Unit
To The Case. Unit Installed
Through Front Of Case
1. Slide the back of the unit into the case. Push the
unit all of the way into the case until it stops.
NOTE: Either of the case sides may be
removed to enable the unit to be
slid into the case.
2. Ground the unit to the case by installing the front
case-to-unit hex-bolt.
Hex bolt
side screws

-13-
Hex bolt
side screws
(may be installed
on either side)
(5b) Install And Ground The Unit To
The Case Unit Installed Through
Side Of Case
1. Slide the side of the unit into the case. Push
the unit all of the way into the case until it stops.
NOTE: Either of the case sides may be
enable the unit to be slid
2. Attach the case side panel to the main case
3. Ground the unit to the case by installing the
front unit-to-case hex-bolt.
removed
to into the case.
Inside
wall Rigid
ductwork
Flexible or rigid
ductwork
Air
discharge
outlet
(6)Connect The Top Duct
1. Install the duct onto the air discharge outlet.
Case top
duct adjusting
screws
Top duct
Clamp
2. Secure the top duct to the unit by turning the four
case top duct adjusting screws until they are tight.
Use a field supplied clamp to lock the top duct to
the case.
(7)Final Check
Review this Checklist before restoring power.
•Correct line voltage?
•Single circuit only?
•Ductwork connected?
•Case and unit level?
•Wall plenum caulked? Level? Flashing?
•Drain connected?
•Unit wired correctly?
•Hydronic plumbing connections (if applicable)
•Hydronic wiring connections (if applicable)
(8)Connect Power
1. If all the above items are correct, turn
the power on at the main service panel.
2. Turn the unit power switch, on the front
of the unit.

-14-
SERVICING
Before servicing, switch power off at the
service panel and lock the area to prevent
power from being switched on accidentally.
When the area cannot be locked securely
fasten a prominent warning device, such as a
tag to the service panel.
NOTE: We strongly recommend that any
servicing be performed by a
qualified individual.
For ease of service, the unit can be
removed from the case:
1. Remove the front case panel.
2. Unplug the power cord.
3. Raise the top duct by turning all four
case top duct adjusting screws
counterclockwise.
4. Remove the front and/or side case-to
unit grounding screw, if present.
5. Slide the unit out of the case.
WARNING
HIGH VOLTAGE
Disconnect all power before servicing
or installing this unit. Multiple power
sources may be present, failure to do
so may cause property damage,
personal injury or death.
NORMAL OPERATING SOUNDS
AND CONDITIONS
Air sounds
The fan cycle switch sets the operational mode
of the fan . In the ON position the fan will run
continuously whenever power is applied in this
mode . In the AUTO position, the fan will cycle
on and off with the compressor or electric heater.
Starting delay
You may notice a few minutes delay in the
starting if you try to restart the unit too soon after
turning it off or if you adjust the thermostat right
after the compressor has shut off .This is due to
a built– in delay to protect the compressor.
Buzzer Response
The buzzer will chime Di”(0.1 sec)as response
when receiving the effective order from key pad
control and remote control.
“
Water trickling sounds
Water is picked up and distributed over the coil.
This improves the efficiency and helps with water
removal.
Water dripping
Water will collect in the base pan during high
humidity days . This can cause overflow and drip
from the outside of the unit.
User Control Configuration
The adjustable control switches are located at the PCB.The inputs are only visible and accessible
with the electric control box removed from the unit.
side screws
side screws
PCB in the electric
contorl case
PCB
1 2 3456 7 8
S1 DIP switch
OFF
ON
1 2 3456 7 8
S1
SW1
1 2 34
SW1 DIP switch
1 2 34
OFF
ON

Switch Setting
1.S1 DIP switch
1 2 3456 7 8
Temperature Setting
Fan CYC. For Cooling
Electric memory
Freeze protect
Heat Pump Prior
Electric heater
Heat pump
Anti-cold air
-15-
Outside Air
Return Air
Inside Air
Supply Air
SW1.3—Duct select
The duct select function allows the indoor fan to be
operated at two variable fan speeds.
When set in the down position(OFF), the unit
automatically selects either high or middle fan speed
( for longer ductwork applications).
When set in the up position(ON), the unit automatically
selects either middle or low fan speed (for shorter
ductwork applications).
Sw itch Description Function Factray
Setting
1# Anti-cold air ON-Enable ;
OFF-Disable; ON
2# Heat pump ON-Enable;
OFF-Disable; ON
3# Electric heater ON-Enable;
OFF-Disable; ON
4# Heat Pump Prior
ON-Heat Pump Prior;
OFF-Electric Heat
Prior; (Only available
for panel control)
ON
5# Freeze protect
ON-Allow the unit to
ensure the indoor
room temperature
does not fall below 40°
F even w hen turned
off; OFF-disable
freeze protection.
ON
6# Electric memory ON-Enable ;
OFF-Disable; ON
7# Fan CYC.
For Cooling
ON-Enable ;
OFF-Disable; OFF
8# Temperature
Setting
ON-Set temp.step for
tw o degree ;
OFF-Set temp.step for
one degree
OFF
2.SW1 DIP switch
SW1.1,SW1.2—Model select
Duct selected
Reserved
1 2 34
Model select
SW1.1、SW1.2—Model select
1 2 34
09K
1 2 34
12K
1 2 34
18K

Error codes and solutions
-16-
Failure code Content of defect
E2 Indoor temperature sensor failure
E3 Indoor coil temperature sensor failure
E5 Outdoor coil temperature sensor failure
E8 Overheating protection/defrosting
E9 Refrigerant high pressure protection
Solution
Check sensor connection.Replace it if broken.
Check sensor connection.Replace it if broken.
Check sensor connection.Replace it if broken.
Make sure indoor and outdoor fans run
normally and air circulation is free from
obstruction.
Make sure indoor and outdoor fans run
normally and air circulation is free from
obstruction.

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
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diagnostic codes
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-17-

160421_V.01