HEAT CONTROLLER, INC.
Wall Mounted
Mini-Split System
VMC09SB-1
VMC12SB-1
VMC18SB-1
VMC24SB-1
This Product meets ENERGY STAR
requirements when appropriate coil
components are used. Ask your
contractor for details
Inverter Single-Zone
AirConditioning
Important Information
• Please read carefully and thoroughly this manual before operating this unit.
• Contact a qualified sevice technician for installation, repair and maintenance of this unit.
• The appliance is not intended for use by young children or those who require supervision.
• Young children should be supervised to ensure that they do not play with the appliance.
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
I Incorrect operation due to ignoring instructions will cause harm or damage. The seriousness is classified by
the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
I Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
Always use a power plug and socket with
a ground terminal.
Do not use a defective or underrated
circuit breaker. Use the correctly rated
breaker and fuse.
Do not use a multi consent. Always use
this appliance on a dedicated cicuit and
breaker.
• There is a risk of electric shock.
• There is risk of fire or electric shock .
• Otherwise it can cause electric shock or fire.
For electrical work, contact the dealer, seller,
a qualified electrician, or an Authorized
Service Center. Do not disassemble or repair
the product by yourself.
Always ground the product as per the
wiring diagram. Do not connect the
ground wire to gas or water pipes
lightening rod or telephone ground wire.
Install the panel and the cover of control
box securely.
• There is risk of fire or electric shock.
• There is risk of fire or electric shock.
• There is risk of fire or electric shock due to
dust , water etc.
Use the correctly rated breaker or fuse.
Do not modify or extend the power cable.
If the power cable or cord has scrathes or
skin peeled off or deteriorated then it
must be replaced.
For installation, removal or reinstall ,
always contact the dealer or an
Authorized Service Center.
• There is risk of fire or electric shock.
• There is risk of fire or electric shock.
• There is risk of fire, electric shock, explosion,
or injury.
Do not install the product on a defective
installation stand. Be sure that the
installation area does not deteriorate with
age.
Never install the outdoor unit on a
moving base or a place from where it
can fall down.
When the product is soaked (flooded or
submerged) in water , contact an
Authorized Service Center for repair
before using it again.
• It may cause product to fall.
• The falling outdoor unit can cause damage or
• There is risk of fire or eletric shock.
injury or even death of a person.
In outdoor unit the step-up capacitor
supplies high voltage electricity to the
electrical components. Be sure to
discharge the capacitor completely
before conducting the repair work.
When installing the unit, use the
installation kit provided with the product.
Be sure to use only those parts which
are listed in the svc parts list. Never
attempt to modify the equipment.
• An charged capacitor can cause electrical
• Otherwise the unit may fall and cause severe
•
The use of inappropriate parts can cause an
shock.
injury.
electrical shock, excessive heat generation or fire.
Owner's Manual
3
Safety Precautions
Indoor/outdoor wiring connections must
be secured tightly and the cable should
be routed properly so that there is no
force pulling the cable from the
connection terminals.
Safely dispose of packing materials,
sharp objects (nails), plastic bags,
batteries, etc. after installation or service.
Make sure to check that the power cable
plug is not dirty, loose or broken and
then only insert the plug completely.
• Improper or loose connections can cause
• Children may play with them and cause
• Dirty, loose or broken power plug can cause
heat generation or fire.
injury.
electric shock or fire.
Please use the correct refrigerant type
specified for the product. Please read the
label on the product.
Don't use a power cord, a plug or a loose
socket which is damaged.
Do not touch , operate, or repair the
product with wet hands. Hold the plug by
hand when taking out
• Incorrect refrigerant used can prevent the
• Otherwise it may cause a fire or electrical
• There is risk of electric shock or fire.
normal operation of the unit.
shock.
Do not place a heater or other heating
appliances near the power cable.
Do not allow water to run into electric
parts. Install the unit away from water
sources.
Do not store or use or even allow
flammable gas or combustibles near the
product.
• There is risk of fire and electric shock.
• There is risk of fire, failure of the product, or
• There is risk of fire.
electric shock.
Do not use the product in a tightly closed
space for a long time. Ventilate the room
regularly.
Do not open the front grille of the product
during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
If strange sounds, smell or smoke comes
from product.Immediately turn the breaker
off or disconnect the power supply cable.
• Oxygen deficiency could occur and hence
• There is risk of physical injury, electric shock,
• There is risk of electric shock or fire.
harm your health.
or product failure.
Ventilate the product room from time to
time when operating it together with a
stove, or heating element etc.
Turn the main power off and unplug the
unit when cleaning or repairing the
product.
When the product is not to be used for a
long time, disconnect the power supply
plug or turn off the breaker.
• Oxygen deficiency can occur and hence harm
• There is risk of electric shock.
• There is risk of product damage or failure, or
your health.
unintended operation.
Take care to ensure that nobody
especially kids could step on or fall onto
the outdoor unit.
Take care to ensure that power cable
could not be pulled out or damaged
during operation.
Do not place ANYTHING on the power
cable.
• This could result in personal injury and
• There is risk of fire or electric shock.
• There is risk of fire or electric shock.
product damage.
Do not plug or unplug the power supply plug to turn the unit
ON/OFF .
When flammable gas leaks, turn off the gas and open a window
for ventilation before turn the product on.
• There is risk of fire or electric shock.
• Do not use the telephone or turn switches on or off. There is risk of
explosion or fire.
Two or more people must lift and
transport the product.
Do not install the product where it will be
exposed to sea wind (salt spray) directly.
Install the drain hose to ensure that the
condensed water is drained away properly.
• Avoid personal injury.
• It may cause corrosion on the product.
• A bad connection may cause water leakage.
Keep level even when installing the
product.
Do not install the product where the noise
or hot air from the outdoor unit could
damage or disturb the neighbor.
Always check for gas (refrigerant)
leakage after installation or repair of
product.
• To avoid vibration or noise.
• It may cause a problem for your neighbors
• Low refrigerant levels may cause failure of
and hence dispute.
product.
4
Room Air Conditioner
Safety Precautions
Do not use the product for special purposes,
such as preserving foods, works of art, etc. It
is a consumer air conditioner, not a precision
refrigeration system.
Do not block the inlet or outlet of air flow.
Use a soft cloth to clean. Do not use
harsh detergents, solvents or splashing
water etc .
• There is risk of damage or loss of property.
• It may cause product failure.
• There is risk of fire, electric shock, or damage
to the plastic parts of the product.
Do not touch the metal parts of the
product when removing the air filter.
Do not step on or put anyting on the
product. (outdoor units)
Always insert the filter securely after
cleaning. Clean the filter every two weeks
or more often if necessary.
• There is risk of personal injury.
• There is risk of personal injury and failure of
• A dirty filter reduces the efficiency.
product.
Do not insert hands or other objects
through the air inlet or outlet while the
product is operating.
Be cautious when unpacking and
installing the product.
If the refrigerant gas leaks during the
repair, ventilate the area and do not touch
the refrigerant gas.
• There are sharp and moving parts that could
• Sharp edges could cause injury.
• The refrigerant gas can cause frostbite (cold
cause personal injury.
burn)
Do not tilt the unit when removing or
uninstalling it.
Do not mix air or gas other than the
specified refrigerant used in the system .
If the refrigerant gas leaks during the
installation, ventilate the area immediately.
• The condensed water inside can spill .
• If air enters the refrigerant system, an
excessively high pressure results, causing
equipment damage or injury.
• Otherwise it can be harmfull for your health.
Dismantling the unit, treatment of the
refrigerant oil and eventual parts should
be done in accordance with local and
national standards.
Replace the all batteries in the remote
control with new ones of the same type.
Do not mix old and new batteries or
different types of batteries.
Do not recharge or disassemble the
batteries. Do not dispose off batteries in
a fire.
• There is risk of fire or product failure.
• They may burn or explode.
If the liquid from the batteries gets onto
your skin or clothes, rinse well with
water and contact your doctor or local
poison control center. Do not use the
remote if the batteries have leaked.
If you consume the liquid from the
batteries, rinse your mouth with water
and contact your doctor or local poison
control center. Do not use the remote if
the batteries have leaked.
Do not let the air conditioner run for a
long time when the humidity is very high
and a door or a window is left open.
• The chemicals in batteries could cause burns
• The chemicals in batteries could cause burns
• Moisture may condense and wet or damage
or other health hazards.
or other health hazards.
furniture.
Humans, pets, and plants should avoid
direct exposure to the cool or hot air
discharge/draft.
Do not drink the water drained from the
product.
Use a firm stool or ladder when cleaning,
maintaining or repairing the product at
elevated heights.
• This could harm to your health.
• It is not sanitary and could cause serious
• Be careful and avoid personal injury.
health issues.
Owner's Manual
5
Electrical Safety
Electrical Safety
• This appliance must be properly grounded.
To minimize the risk of electric shock, you must alway plug into a grounded oulet.
• Do not cut or remove the grounding prong from the power plug.
• Attaching the adapter ground terminal to the wall receptacle cover screw does not ground the appliance
unless the cover screw is metal and not insulated, and the wall receptacle is grounded through the
house wiring.
• If you have any doubt whether the air conditioner is properly grounded, have the wall receptacle and
circuit checked by a qualified electrician.
Temporary Use of an Adapter
We strongly discourage the use of an adapter due to potential safety hazards. For temporary connections,
use only a genuine adapter, available from most local hardware stores. Ensure that the large slot in the
adapter is aligned with the large slot in the receptacle for a proper polarity connection.
To disconnect the power cord from the adapter, use one hand on each to avoid damaging the ground
terminal. Avoid frequently unplugging the power cord as this can lead to eventual ground terminal damage.
• Never use the appliance with a broken adapter.
Symbols used in this Manual
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that may cause harm to the
air conditioner.
This symbol indicates special notes.
NOTE
6
Room Air Conditioner
Product Introduction
Product Introduction
Here is a brief introduction of the indoor and outdoor units. Please see the information specific to your
indoor unit type.
Indoor Units
Air inlet
Grille tab
Deodorizer
Front grille
filter
ON/OFF button
Air filter
Signal
receiver
Flap
Air outlet
Louvers
(Vertical blades)
(Horizontal blade)
Operation Indication Lamps
: Lights up during the system operation, error code and auto restart setting.
On/Off
Sleep mode : Lights up during sleep mode auto operation.(non-Inverter Model)
: Lights up during timer operation.(non-Inverter Model)
Timer
Lights up during timer operation or sleep mode auto operation (Inverter Model only)
Outdoor unit
operation
: Lights up during outdoor unit operation. (Cooling model only)
Power Display : Indicates the setting temperature and operation mode.
Operation
mode
Energy-saving
cooling mode
Test
operation
Auto
clean
JetCool
Shape of
display
Outdoor Unit
Air intake vents
Connecting
wires
Refrigerant pipes
Air outlet vents
Base plate
Drain hose
Owner's Manual
7
Operating Instructions
Operating Instructions
How to insert the Batteries
1. Remove the battery cover by pulling it according to the arrow
direction.
2. Insert new batteries making sure that the (+) and (-) of battery are
installed correctly.
3. Reattach the cover by sliding it back into position.
NOTE
1. Always use/replace both batteries of same type.
2. If the system is not to be used for a long time, remove the
batteries to save their working life.
3. If the display screen of remote controller starts, fading replace
both of the batteries.
Wireless Remote Controller Maintenance
1. Choose a suitable place where its safe & easy
to reach.
2. Fix the holder to wall etc with the supplied
screws firmly.
3. Slide the remote controller inside the holder.
NOTE
1. Remote controller should never be exposed to
direct sunlight.
2. Signal transmitter & receiver should always be
clean for proper communication. Use a soft
cloth to clean them.
3. In case some other appliances also get
operated with remote control, change their
position or consult your serviceman.
Operating Method
1. The signal receiver is inside the unit.
2. Aim the remote controller towards the unit to operate it.
There should not be any blockage in between.
8
Room Air Conditioner
Operating Instructions
Wireless Remote Controller
The controls will look like the following.
Signal transmitter
1. START/STOP BUTTON
Used to turn off/on the unit.
2. OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
3. ROOM TEMPERATURE SETTING BUTTONS
Used to select the room temperature.
4. INDOOR FAN SPEED SELECTOR BUTTON
Used to select fan speed in four steps
low, medium, high and CHAOS.
5. JET COOL BUTTON
Used to start or stop the speed cooling.
(It operates fan in super high speed.)
6. CHAOS SWING BUTTON
Used to stop or start louver movement and set the
desired up/down airflow direction.
7. ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping
operation.
8. TIME SETTING BUTTONS
Used to adjust the time.
9. TIMER SET/CANCEL BUTTON
Used to set and to cancel the timer operation.
10. SLEEP MODE AUTO BUTTON
Used to set sleep mode auto operation.
11. ENERGY-SAVING COOLING MODE BUTTON
5
6
1
3
4
10
2
7
CANCEL
9
12
13
ON
OFF
SET
AUTO CLEAN
11
8
14
17
15
16
Used to save Energy.
12. ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
13. AUTO CLEAN BUTTON
Used to set auto clean mode.
Flip-up door
(opened)
14. ˚C TO ˚F SWITCHING BUTTON
Used to switch temperature reading from Centigrade
to Fahrenheit.
Operation Mode
15. RESET BUTTON
Used prior to resetting time.
Cooling Operation
16. 2nd F BUTTON
Used prior to using modes printed in blue at the
bottom of buttons.
17. HORIZONTAL AIRFLOW DIRECTION CONTROL
BUTTON (OPTIONAL)
Healthy Dehumidification Operation
Used to set the desired horizontal airflow direction.
•
Cooling Model(
)
NOTE
To use the functions printed in blue at the bottom of the buttons press 2nd F button first and then the required function
button. Pressing the 2nd F button activates the blue printed function of the respective button. To cancel the function
press the 2nd F button again else it will automatically cancel if remains idle after 10 seconds.
Owner's Manual
9
Operating Instructions
Operation Mode
Press the START/STOP BUTTON to
turn the unit on.
The unit will respond with a beep.
1
2
1
3
4
Open the door of the remote controller and press the
operation mode button. Each time the button is pressed, the
operation mode is shifted in the direction of the arrow.
2
ON
Cooling
Healthy
Dehumidification
For cooling operation set the desired indoor temperature by
pressing the ROOM TEMPERATURE SETTING BUTTONS.
For cooling the temperature can be set within 18°C~30°C
(64°F~86°F).
3
4
To raise the temperature
To lower the temperature
Set the fan speed with the remote controller. You can select the fan speed in four steps-low,
medium, high and CHAOS by pressing the INDOOR FAN SPEED SELECTOR BUTTON.
Each time the button is pressed, the fan speed mode is shifted.
CHAOS Air
Fan speed is on low. Fan speed is on medium. Fan speed is on high.
Natural wind by the CHAOS logic
❏
For fresher feeling, press the INDOOR FAN SPEED SELECTOR BUTTON selector and set to CHAOS mode.
In this mode, the wind blows like a natural breeze by automatically changing fan speed according to the CHAOS logic.
10 Room Air Conditioner
Operating Instructions
Healthy Dehumidification Operation
During Healthy Dehumidification Operation
❏ If you select the dehumidification mode on the OPERATION MODE
SELECTION BUTTON, the product starts to run the dehumidification
function. It automatically sets the room temperature and airflow volume to
the best condition for dehumidification, based on the sensed current room
temperature.
In this case, however, the setting temperature is not displayed on the remote
controller and you are not able to control the room temperature either.
❏ During the healthy dehumidification function, the airflow volume is
Healthy
Dehumidification
automatically set according to the optimization algorithm responding to the
current room temperature status, so that the room condition is kept healthy
and comfortable even in the very humid season.
To run the healthy dehumidification mode follow steps 1, and 2 and 4
(See operation mode)
Jet Cool Operation
Jet cool function can be used to cool the room quickly in hot summer. When this
function is turned on, the air conditioner runs in cooling operation mode with super
high fan speed and 18°C(64°F) setting temperature for 30 minutes for fast and
effective cooling.
You can activate this operation by pressing the JET COOL BUTTON.
To change from jet cool mode to high fan speed cooling mode, press the JET COOL BUTTON or
INIDOOR FAN SPEED SELECTOR BUTTON or the ROOM TERPERATURE SETTING BUTTON again.
Auto Clean
❏ During auto clean function, moistures left in indoor units after cooling operation or healthy dehumidification
operation can be removed.
1. Press the AUTO CLEAN BUTTON to activate this function.
AUTO CLEAN
2. Now whenever the unit is turned off, the indoor fan is still running for about 30
minutes internally without cooling or dehumidification operation. Also the louver is
closed.
3. This dries up any remains of moisture & cleans the unit internally.
4. If you press AUTO CLEAN BUTTON again during operation, this function is
cancelled.
NOTE
❏ During auto clean function, only START/STOP BUTTON and AUTO CLEAN BUTTON can be used.
Owner's Manual 11
Operating Instructions
Energy-Saving Cooling Mode
Energy-saving cooling mode can save energy in cooling and healthy dehumidification operation, because it
can operate efficiently by setting body-adaptation time according to the change of time and temperature and
adjusting automatically desired temperature.
1. Press the START/STOP BUTTON to start the unit.
2. Open the door on the remote controller.
Select cooling operation or healthy dehumidification operation.
3. Press the ENERGY-SAVING COOLING MODE BUTTON.
4. To cancel the energy-saving cooling mode, press the ENERGY-SAVING
COOLING MODEL BUTTON again and unit will operate in previous
mode(Cooling or healty dehumidification mode).
Forced operation
Operation procedures when the remote control can't be used.
The operation will be started if the ON/OFF button is pressed.
If you want to stop operation, re-press the button.
ON/OFF
button
Cooling Model
Operating mode
Indoor FAN Speed
Setting Temperature
Cooling
High
22°C(71.6°F)
Test operation
During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room
temperature and resets in 18 minutes.
During test operation, if remote controller signal is received, the unit operates as remote controller sets.
If you want to use this operation, Press and hold the ON/OFF button for 3~5 seconds, then the buzzer sound
1 "beep".
If you want to stop the operation, re-press the button.
12 Room Air Conditioner
Operating Instructions
Sleep Mode
1. Press the SLEEP MODE AUTO BUTTON to set the time when you want the unit to stop automatically.
2. The timer is programmed in one-hour increments by pressing the SLEEP MODE AUTO BUTTON 1 to 7 times.
The sleep mode is available for 1 to 7 times.
To alter the time period in steps of 1 hour, press the SLEEP MODE AUTO BUTTON while aiming at air conditioner.
3. Make sure the Timer LED lights up.
To cancel the sleep mode, press the SLEEP MODE AUTO BUTTON several times until the Timer LED lights off.
NOTE
• The sleep mode will operate indoor fan at slow speed in cooling mode.
In cooling mode or healthy dehumidification mode:
The setting temperature will rise automatically two times by 1°C(2°F) over next consecutive 30 minutes [2°C(4°F) in 1
hour] for a comfortable sleep. Now this will be the final setting temperature as long as sleep mode is functioning.
Setting the Current Time
1. Time can be set only when you press the RESET BUTTON. Having replacing the batteries,
you should press the RESET BUTTON to reset the time. Press the Start/Stop button.
2. Press 2nd F button and check if
icon is on.
3. Press the TIME SETTING BUTTONS until the desired time is set.
CANCEL
4. Press the TIME SET/CANCEL BUTTON.
SET
NOTE
Check the indicator for A.M. and P.M.
Timer Setting
1. Make sure to set current time correctly on the display of the remote controller.
ON
OFF
2. Press 2nd F button.
3. Press the ON/OFF TIMER BUTTONS to turn timer on or off.
4. Press the TIME SETTING BUTTONS until the desired time is set.
CANCEL
SET
5. To set the selected time, press the TIMER SETTING BUTTONS aiming the remote controller at the
signal receptor.
To cancel the timer setting
CANCEL
Check if
icon is off.
SET
Press the TIMER CANCEL BUTTON aiming the remote controller at the signal receptor.
(The timer lamp on the air conditioner and the display will go off.)
NOTE
Select one of the following four types of operation.
Delay off timer
Delay on timer
Delay off and on timer
Delay on and off timer
Owner's Manual 13
Operating Instructions
Vertical / Horizontal Airflow Direction Control (Optional)
The up/down airflow (Vertical airflow) can be
adjusted by using the remote controller.
The left/right(Horizontal airflow) can be adjusted
by using the remote control.
1. Press the START/STOP BUTTON to start the
unit.
1. Press the START/STOP BUTTON to start the
unit.
2. Press the HORIZONTAL AIRFLOW
DIRECTION BUTTON.
2. Press CHAOS SWING BUTTON.
3. The louvers will swing left &
right automatically.
3. The louvers will swing up &
down automatically.
4. To stop the louvers at a desired
4. To stop the louver at a desired
angle, press
again.
angle, press
again
NOTE
• By pressing the CHAOS SWING BUTTON the horizontal air flow direction is changed automatically based on the chaos
algorithm to distribute the air in the room evenly and at the same time to make the human body feel most comfortable as if
enjoying natural breeze.
• Always use the remote controller to adjust the up and down air flow direction. Manually moving the vertical air flow
direction louver by hand could damage the mechanism.When the unit is shut off, the up/down airflow direction louver will
close the air outlet vent of the system.
Auto Restart Function
This function is useful in the situation of power failure.
When power regains after a failure this feature restore the previous operating condition
and the air conditioner will run in the same settings.
NOTE
This feature is enabled by factory default setting, but you can
disable it by pressing the ON/OFF button for 6 seconds. The unit
will beep twice and the indicator lamp(2) will blink 4 times.
To enable it, press the button again for 6 seconds. The unit will
beep twice and the indicator lamp(1) will blink 4 times.
ON/OFF
button
14 Room Air Conditioner
Maintenance and Service
Maintenance and Service
Before performing any maintenance, turn off the main power to the system, disconnect the circuit breaker and
unplug the power cord.
Indoor Unit
Clean the unit with a soft dry cloth. Do not use bleach or abrasives.
Never use any of these
P
o
w
d
e
r
• Water hotter than 40°C(104°F). It may cause deformation and discoloration.
• Volatile substances. They may damage the surface of the air conditioner.
G
a
e
oli
n
s
Air Filters
The air filters behind the front panel / grill should be checked and
cleaned once in every 2 weeks or more often if necessary. To
remove the filters see the self explanatory diagrams for each
model type. Clean the filters with a vacuum cleaner or warm
soapy water. If dirt is not easily removed, wash with a solution of
detergent in luke warm water. Dry well in shade after washing and
reinstall the filters back in place.
Deodorizer Filters
Remove the deodorizer filters behind the air filter and expose
them in direct sunlight for 2 hours.
And then insert these filters into original position.
Removal of Filters
Open the front panel as shown.
Then pull the filter tab slightly forward to remove the air filter.
After removing the air filter remove the deodorizer filter by slightly pulling forward.
Deodorizer
filter
Owner's Manual 15
Maintenance and Service
Outdoor Unit
The heat exchanger coils and panel vents of the outdoor unit should be checked regularly.
If clogged with dirt or soot, the heat exchanger and panel vents may be professionally steam cleaned.
NOTE
Dirty or clogged coils will reduce the operating efficiency of the system and cause higher operating costs.
Operation Tips!
Do not overcool the room.
Keep blinds or curtains
closed.
Keep the room temperature
uniform.
This is not good for the health and Do not let direct sunshine enter
Adjust the vertical and horizontal
airflow direction to ensure a
uniform temperature in the room.
wastes electricity.
the room when the air conditioner
is in operation.
Make sure that the
doors and windows
are shut thight.
Clean the air filter
regularly.
Ventilate the room
occasionally.
Use high fan speed
for effective and fast
cooling.
Avoid opening doors and
windows as much as
possible to keep the cool
air in the room.
Blockages in the air filter
reduce the airflow and
lower cooling and
dehumidifying effects.
Clean at least once every
two weeks.
Since windows are kept
closed, it is a good idea
to open them and
ventilate the room now
and then.
The unit gives its rated
cooling capacity when the
fan speed is high.
Self-Diagnosis Function
This unit has an inbuilt error diagnosis capability. Unit LED(
Please contact your serviceman/dealer in such a situation
) will blink in case if thermistor fails.
Error Display LED (
(once)
)
Check Point
• Indoor room temperature thermistor open/short.
• Indoor pipe temperature thermistor open/short.
3 sec
3 sec
3 sec
16 Room Air Conditioner
Maintenance and Service
Troubleshooting Tips! Save time and money!
The air conditioner may be operating abnormally when:
Problem
Possible Causes
What To Do
I The air conditioner is
unplugged.
• Make sure the air conditioner plug is
pushed completely into the outlet.
I The fuse is blown/circuit
breaker is tripped.
• Check the house fuse/circuit breaker box
and replace the fuse or reset the breaker.
Air
I Power failure.
• If power failure occurs, turn the mode
control to OFF.
When power is restored, wait 3 minutes to
restart the air conditioner to prevent
tripping of the compressor overload.
conditioner
does not start
I High voltage.
• If the voltage is unusually very high or low
the Circuit Breaker will trip.
• Make sure there are no curtains, blinds, or
furniture blocking the front of the air
conditioner.
I Airflow is restricted.
• Clean the filter at least every 2 weeks.
See the Maintenance and Service section.
I The air filter is dirty.
Air
I
The room may have been hot. • When the air conditioner is first turned on,
conditioner
does not cool
as it should
you need to allow time for the room to cool
down.
I Cold air is escaping.
• Check for open furnace floor registers and
cold air returns.
I
Check the temperature settings. • Make sure they are correct.
I There might be a heating
source in the room.
• Check and remove such source or turn it
off while using the air conditioner.
Call the service immediately in the following situations
1. Anything abnormal such as burning smell, loud noise etc. happen. Stop the unit and
turn the breaker off. Never try to repair by yourself or restart the system in such cases.
2. Main power cord is too hot or damaged.
3. Error code is generated by self diagnosis.
4. Water leaks from indoor unit even if the humidity is low.
5. Any switch, breaker (safety, ground) or fuse fails to work properly
User must carry routine checkup & cleaning to avoid unit’s poor performance.
In case of special situation, the job must be carried out by service person only.
Owner's Manual 17
Memo
18 Room Air Conditioner
Specifications and performance data subject to change without notice.
HEAT CONTROLLER, INC.
1900 WELLWORTH AVENUE • JACKSON, MICHIGAN 49203
THE QUALITY LEADER IN CONDITIONING AIR
Jan. 2008
P/No.: MFL39817405
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