APPENDIX A Operating Instructions

CS-MKE7NKU
CS-MKE9NKU
CS-MKE12NKU
(852-6-4181-217-00-2)

A-1
 Operating Instructions
Split System Air Conditioner
Model No.
Indoor Units Outdoor Units
CS-MKE7NKU CU-3KE19NBU
CS-MKE9NKU CU-4KE24NBU
CS-MKE12NKU CU-4KE31NBU
This air conditioner uses the refrigerant R410A.

Before operating the unit, read these operating instructions thoroughly and keep them for future reference.

Panasonic Corporation
1006 Kadoma, Kadoma City, Osaka, Japan
85264181217002 CV6233187617
FEATURES
This air conditioner is an inverter type unit that automatically adjusts capability as appropriate. Details on these functions
are provided below; refer to these descriptions when using the air conditioner.
• Microprocessor Controlled Operation • Auto. Flap Control
The interior compartment of the remote controller This automatically sets the flap to the optimum position
contains several features to facilitate automatic operation, during heating, cooling, and drying operation.
easy logically displayed for easy use.
• Hot Start Heating System
• Simple One-touch Remote Controller Right from the start, the air is warm and
The remote controller has several features to facilitate comfortable. This system prevents any cold blasts
automatic operation. at the beginning while the heat pump is warming
• 24-Hour ON or OFF Timer up, or even defrosting.
This timer can be set to automatically turn the unit on or • Automatic Restart Function for Power Failure
off at any time within a 24 hour period. Even when power failure occurs, preset programmed
• 1-Hour OFF Timer operation can be reactivated once power resumes.
This timer can be set to automatically turn off the unit at • High Power Operation
any time after one hour. If not in Auto Operation, the unit operates at maximum
• Night Setback output for 30 minutes, regardless of the desired
This function saves energy by controlling operation to temperature.
provide a quieter operating sound than normal. The fan speed is 1 step above “High”.
• Automatic and 3-step Fan Speed • Quiet Operation
Auto/High/Medium/Low The fan rotates slower than the fan speed setting to
provide a quieter operating sound.
• Air Sweep Control
This function moves a flap up and down in the air outlet,
directing air in a sweeping motion around the room and
providing comfort in every corner.

CONTENTS
Page Page
FEATURES............................................................................. 2 SPECIAL REMARKS ........................................................... 17
PRODUCT INFORMATION .................................................... 2 SETTING THE TIMER ......................................................... 18
SAFETY PRECAUTIONS....................................................... 2 USING THE 1-HOUR OFF TIMER....................................... 20
INSTALLATION LOCATION.................................................... 3 TIPS FOR ENERGY SAVING .............................................. 20
ELECTRICAL REQUIREMENTS ........................................... 3 ADJUSTING THE AIRFLOW DIRECTION........................... 21
SAFETY INSTRUCTIONS...................................................... 3 OPERATION WITHOUT THE REMOTE CONTROLLER..... 22
NAMES OF PARTS ................................................................ 5 CARE AND CLEANING ....................................................... 22
USING THE REMOTE CONTROLLER ................................ 10 WIRED REMOTE CONTROLLER........................................ 24
OPERATION WITH THE REMOTE CONTROLLER............. 12 TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)......25
1. Automatic Operation ............................................. 12 OPERATING RANGE........................................................... 25
2. Manual Operation.................................................. 13 SPECIFICATIONS................................................................ 26
3. Adjusting the Fan Speed ....................................... 14
4. Night Setback Mode.............................................. 15
5. QUIET Mode ......................................................... 16
6. HIGH POWER Mode............................................. 16

PRODUCT INFORMATION SAFETY PRECAUTIONS

If you have problems or questions concerning your Air The following symbols used in this manual, alert you
Conditioner, you will need the following information. to potentially dangerous conditions to users, service
Model and serial numbers are on the nameplate on the personnel or the appliance:
bottom of the cabinet.
This symbol refers to a hazard or
Model No. __________________________________ unsafe practice which can result in
severe personal injury or death.
Serial No. ___________________________________
This symbol refers to a hazard or
Date of purchase _____________________________ CAUTION
unsafe practice which can result in
personal injury or product or property
Dealer’s address _____________________________
damage.
Phone number _______________________________

2
 INSTALLATION LOCATION
• We recommend that this air conditioner be installed properly by qualified
installation technicians in accordance with the Installation Instructions
provided with the unit.
• Before installation, check that the voltage of the electric supply in your home or
office is the same as the voltage shown on the nameplate.

• Do not install this air conditioner where there are fumes or flammable
gases, or in an extremely humid space such as a greenhouse.
• Do not install the air conditioner where excessively high heat-
generating objects are placed.

Avoid: To protect the air conditioner from heavy corrosion, avoid installing the outdoor
unit where salty sea water can splash directly onto it or in sulphurous air near a
spa.

ELECTRICAL REQUIREMENTS
1. All wiring must conform to the local electrical codes. Consult your dealer or a
qualified electrician for details.
2. Each unit must be properly grounded with a ground (or earth) wire or through
the supply wiring.
3. Wiring must be done by a qualified electrician.

Pull off the power plug from a receptacle, or switch off the breaker, or switch off
NOTE
the power disconnecting mean to isolate the air conditioner from the main power
supply when not in use for a long time.

SAFETY INSTRUCTIONS
• Read this Instruction Manual carefully before using this air conditioner. If
you still have any difficulties or problems, consult your dealer for help.
• This air conditioner is designed to give you comfortable room conditions.
Use this only for its intended purpose as described in this Instruction
Manual.

• Confirm to authorized dealer or specialist on usage of specified

refrigerant type.
Using of refrigerant other than the specified type may cause product
damage, burst and injury etc.
• Never touch the unit with wet hands.
• Never use or store gasoline or other flammable vapor or liquid near the
air conditioner — it is very dangerous.
• Do not use this appliance in a potentially explosive atmosphere.
• This air conditioner has no ventilator for intaking fresh air from
outdoors. You must open doors or windows frequently when you use
gas or oil heating appliances in the same room, which consume a lot of
oxygen from the air. Otherwise there is a risk of suffocation in an
extreme case.
• Do not swallow the battery.
• After removing the battery from remote controller, keep it away from the
reach of children. The battery can cause death by suffocation if
swallowed.
• When inserting the battery, make sure the polarities (+ and -) are correct.

3
 • To prevent possible hazards from insulation failure, the unit must
be grounded.
• Do not clean inside the indoor and outdoor units by users. Engage
authorized dealer or specialist for cleaning.
• In case of malfunction of this appliance, do not repair by yourself.
Contact to the sales dealer or service dealer for a repair.
• Refrigerant gas leakage may cause fire.
• For safety, be sure to turn the air conditioner off and also to
disconnect the power before cleaning.
• Pull off the power plug from a receptacle, or switch off the breaker, or
switch off the power disconnecting mean to isolate the air conditioner
from the main power supply in case of emergency.

• Do not turn the air conditioner on and off from the power mains switch.
CAUTION Use the ON/OFF operation button.
• Do not stick anything into the air outlet of the outdoor unit.
This is dangerous because the fan is rotating at high speed.
• Do not touch the air inlet or the sharp aluminum
fins of the outdoor unit. You may get injured.
• Keep the fire alarm and the air outlet at least 1.5m away from the unit.
• Do not let children play with the air conditioner.
• Do not cool or heat the room too much if babies or invalids are present.
• Do not sit or step on the unit.
You may fall down accidentally.
• Do not stick any object
into the FAN CASE.
You may be injured and
the unit may be damaged.

• This device complies with part 15 of the FCC Rules.

NOTICE
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause
undesired operation.
• This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
• FCC Caution: To assure continued compliance, follow the attached installation
instructions. Any changes or modifications not expressly approved by the
party responsible for compliance could void the user's authority to operate this
equipment.

4
 NAMES OF PARTS
Air Intakes
INDOOR UNIT

Air Outlet

Remote Controller

Drain Hose

Refrigerant Tubes

OUTDOOR UNIT

Air Outlet

This illustration is based on the external view of a standard model.

NOTE
Consequently, the shape may differ from that of the air conditioner which you
have selected.

This air conditioner consists of an indoor unit and an outdoor unit. You can
control the air conditioner with the remote controller.

Air Intake Air from the room is drawn into this section and passes through air filters which
remove dust.

Air Outlet Conditioned air is blown out of the air conditioner through the air outlet.

Remote Controller The remote controller controls power ON/OFF, operation mode selection,
temperature, fan speed, timer setting, and air sweeping.

Refrigerant Tubes The indoor and outdoor units are connected by copper tubes through which
refrigerant gas flows.

Drain Hose Moisture in the room condenses and drains off through this hose.

Outdoor (Condensing) Unit The outdoor unit contains the compressor, fan motor, heat exchanger coil, and
other electrical components.

5
 UNIT DISPLAY AND OPERATION BUTTON

INDOOR UNIT

IMPORTANT
OPERATION lamp
TIMER lamp
Avoid using radio equipment
QUIET QUIET lamp
such as mobile phone near
(within 4 ft. (1.2m)) the remote
control receiver. Some radio OPERATION button
equipment may cause
malfunction of the unit.

If the trouble happens,

disconnect power and restart REMOTE CONTROL receiver
the air conditioner after a few
minutes.

REMOTE CONTROL receiver This section picks up infrared signals from the remote controller (transmitter).

OPERATION button When the remote controller cannot be used, pressing this button enables heating
and cooling operation.

Each time this button is pressed, the type of operation conducted is indicated by
the changing color of the OPERATION lamp. Press the button and select the
lamp color that suits your preference for operation.
Cooling operation Heating operation Stop
(green) (red) (lamp off)

OPERATION lamp This lamp lights when the system is in the continuous AUTO (red or green),
HEAT (red), DRY (orange) and COOL (green) mode.
The OPERATION lamp lights up red and orange alternately when the system is
defrosting.

TIMER lamp This lamp lights when the system is being controlled by the timer.

QUIET lamp This lamp lights during operation in the QUIET mode.

NOTE The unit’s display lamps are dimmed during operation in the NIGHT SETBACK
mode.

6
 REMOTE CONTROLLER (DISPLAY)
Displayed when transmitting data

Displayed when indoor unit

sensor is in use
Displayed when setting
temperature
Displayed when temperature is
shown

Displayed when setting timer

Displayed when the

time display is set to
12-hour time.

Symbols

(1) Operation mode (4) Timer

24-hour clock with ON/OFF
AUTO .........................................
program Timer............................

HEAT ..........................................
ON Timer....................................

MILD DRY ..................................

OFF Timer. .................................

COOL ......................................... 1-hour OFF Timer.......................

(2) Fan speed

(5) NIGHT SETBACK ......................
Automatic operation ...................

(6) Confirmation of transmission......

HIGH .........................................

MEDIUM..................................... (7) Auto. flap indication ....................

LOW ........................................... Flap angle indication ..................

Sweep indication ........................

(3) Temperature setting
60 – 86 °F
When set to 80 °F
(8) High power operation .................
temperature indication................

(9) Quiet operation...........................

7
 REMOTE CONTROLLER
Transmitter Sensor

Display (Cover closed)

QUIET button ON/OFF operation button

1 HR. TIMER button
Temperature setting buttons (TEMP.)

MODE selector button

FAN SPEED selector button NIGHT SETBACK button
FLAP button HIGH POWER button
ON TIME Advance button OFF TIME
Advance button
setting setting
buttons Return button Return button buttons
CANCEL button CLOCK button
SENSOR button Time display selector button
ACL button
Temperature display selector button
ADDRESS switch

NOTE The illustration above pictures the remote controller after the cover has been
opened.

Transmitter When you press the buttons on the remote controller, the mark appears in the
display to transmit the setting changes to the receiver in the air conditioner.

Sensor A temperature sensor inside the remote controller senses the room temperature.

Display Information on the operating conditions is displayed while the remote controller is
switched on. If the unit is turned off, FLAP setting and FAN SPEED setting are
not displayed.

QUIET button : When you press this button, the fan rotates slower than the fan speed
setting to provide a quieter operating sound.

ON/OFF operation button This button is for turning the air conditioner on and off.

1 HR. TIMER button : When you press this button, regardless of whether the unit is operating or
(1-HOUR OFF TIMER) stopping, the unit operates for one hour and then shuts down.

Temperature setting buttons Press the button to increase the set temperature.
(TEMP.) Press the button to reduce the set temperature.
The temperature setting changes by 1 °C or 2 °F each time one of the TEMP.
buttons is pressed.

8
 REMOTE CONTROLLER (CONTINUED)
MODE selector button Use this button to select AUTO, HEAT, DRY or COOL mode.
(AUTO) : The air conditioner calculates the difference between the thermostat
setting and room temperature, and automatically selects ‘‘COOL’’ or
‘‘HEAT’’ mode as appropriate.
(HEAT) : The air conditioner makes the room warmer.
(DRY) : The air conditioner reduces the humidity in the room.
(COOL) : The air conditioner makes the room cooler.

NOTE When multiple indoor units are used and units in other rooms are already operating, they
will be set to the same mode of operation as the operating indoor units.

FAN SPEED selector button : The air conditioner automatically decides the fan speeds.
: High fan speed
: Medium fan speed
: Low fan speed

NIGHT SETBACK button For details, see “4. Night Setback Mode”. When you press this button in the
HEAT, DRY or COOL mode, the mark appears in the display, and the remote
controller will automatically adjust the set temperature to save energy.

FLAP button Press this button either to select the setting of the airflow direction to the auto.
flap in each mode or one of the six possible positions manually or to select the
sweep function which moves the flap up and down automatically.
: Auto flap setting: If selected in a heating operation, the flap is set to
position (3) in the following chart. If selected in a cooling or dry operation,
the flap is set at position (7) in the following chart.
: The airflow direction can be set manually. (six positions)
: The flap moves up and down automatically.

NOTE When you press the FLAP button, the air flow direction will be changed one by
one as follows.

SWEEP

HIGH POWER button : If this button is pressed during HEAT, DRY or COOL operation, the unit
operates at maximum output for 30 minutes, regardless of the desired
temperature.
The fan speed is 1 step above “High”.

ON TIME/OFF TIME setting No display: The timer does not operate.

buttons : The air conditioner starts at the set time.
: The air conditioner stops at the set time.
: The air conditioner stops and starts, or starts and stops, at the
set times every day. For details, see “SETTING THE TIMER”.

SENSOR button When you press this button (use a small-tipped object such as a ballpoint pen),
the mark will appear at the display. And the room temperature is detected by
the sensor which is built into the indoor unit and the air conditioner is controlled
accordingly.

NOTE If the remote controller is located near a heat source, such as a space heater or in
direct sunlight, press the SENSOR button to switch to the sensor on the indoor unit.

NOTE The indoor fan runs continuously when the system is in normal operation. It does not turn off when the
desired room temperature is reached. If Night Set Back mode is selected, the fan will turn off
intermittently during cooling operation in order to control air flow.

9
 REMOTE CONTROLLER (CONTINUED)
Temperature Display Selector This switches the temperature display between °C and °F.
button

Time Display Selector button This switches the time display between 24-hour time and 12-hour time.

ACL button (ALL CLEAR) Puts the remote controller into pre-operation status. Always press this button
after replacing the batteries.

ADDRESS switch • The address switch changes to prevent mixing of signals from remote
controller’s when two air conditioners are installed next to each other.
Normally, the address switch is set to A. For more information, please contact
the dealer where you made the purchase.
• Normally, the tabs on the remote controller should not be bent.

NOTE The remote controller sends the temperature signal to the air conditioner regularly at five minute intervals.
If the signal from the remote controller stops for more than 15 minutes due to the loss of the remote
controller or other trouble, the air conditioner will switch to the temperature sensor which is built into the
indoor unit and control the room temperature. In these cases, the temperature around the remote
controller may differ from the temperature detected at the air conditioner’s position.

USING THE REMOTE CONTROLLER

How to Install Batteries
1. Slide the cover in the direction indicated by the arrow
and remove it.
2. Install two AAA alkaline batteries. Make sure the
batteries point in the direction marked in the battery
compartment.
3. Use a thin object such as the tip of a pen to press the
ACL button
ACL button.

• The batteries last about six months, depending on how much you use
CAUTION the remote controller. Replace the batteries when the remote controller’s
display fails to light, or when the remote controller cannot be used to
change the air conditioner’s settings.
• Use two fresh leak-proof type-AAA alkaline batteries.
• In replacing batteries, follow the instructions as mentioned in the
subsection “How to Install Batteries”.
• If you do not use the remote controller more than 1 month, take out the
batteries.
• Dispose of the used batteries at the designated location in compliance
with the applicable local ordinances.

Information for Users on Collection and Disposal of Old Equipment and used Batteries

[Information on Disposal in other Note for the battery symbol (bottom two
Countries outside the European Union] symbol examples):
These symbols are only valid in the This symbol might be used in combination
European Union. If you wish to discard these with a chemical symbol. In this case it
items, please contact your local authorities complies with the requirement set by the
or dealer and ask for the correct method of Directive for the chemical involved.
disposal. Pb

10
 USING THE REMOTE CONTROLLER (CONTINUED)

How to Use the Remote When using the remote controller, always point the unit’s transmitter head directly
Controller at the air conditioner’s receiver.
Air Conditioner
(Indoor unit)

Receiver
Remote Controller (Transmitter head)

Remote Controller Installation The remote controller may be operated either from a non-fixed position or from a
Position wall-mounted position. To ensure that the air conditioner operates correctly, do
not install the remote controller in the following places:

• In direct sunlight
• Behind a curtain or other places where it is covered
• More than 26 ft (8 m) away from the air conditioner
• In the path of the air conditioner’s airstream
• Where it may become extremely hot or cold
• Where it may be subject to electrical or magnetic noise
• Where there is an obstacle between the remote controller and air conditioner
(since a check signal is sent from the remote controller every 5 minutes)

Mounting the Remote Before mounting the remote controller, press the ON/OFF operation button at the
Controller mounting location to make sure that the air conditioner operates from that
location. The indoor unit should make a beeping sound to indicate that it has
received the signal.

Remote Control Rear Side

Holder

Press
Mounting Screws
5/32 x 5/8" (4 x 16 mm)
(included)
Set in
place Hole

• To prevent loss of the remote controller, you

can connect the remote controller to the
holder by passing a string through the
remote controller and attachment hole.

To take out the remote controller, pull it forward.

When Holding the Remote • When using the remote controller and during air conditioner operation, the
Controller transmitter on the remote controller should be pointed towards the receiver on
the indoor unit.
• Make sure that there are no objects between the remote controller and
receiver which could block the signal.

11
 OPERATION WITH THE REMOTE CONTROLLER
1. Automatic Operation The air conditioner calculates the difference between the thermostat setting and
room temperature, and automatically determines the mode to operate under
cooling or heating. Then, the air conditioner continuously operates under the
mode selected at initial operation.

STEP 2

STEP 1

NOTE Check that the circuit breaker on the power panel is turned on.

Once mode is selected and the unit is preset by following the steps below, you
can have the air conditioner automatically bring the room to the desired
temperature simply by pressing the ON/OFF operation button.

STEP 1 Press the MODE selector button to .

STEP 2 Press the ON/OFF operation button.

To stop the air conditioner, press the ON/OFF operation button again.

NOTE • To change the temperature setting; press the temperature setting buttons and
change the setting to the desired temperature.

12
 OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
2. Manual Operation

STEP 2

STEP 3

STEP 1
STEP 4

STEP 5

NOTE Check that the circuit breaker on the power panel is turned on.

If the automatic operation settings of the unit do not meet your needs, press the
setting buttons as described below and change the settings as desired.

STEP 1 Press the MODE selector button and select the desired mode.
For heating operation o
For dehumidifying operation o
For cooling operation o

STEP 2 To start the air conditioner, press the ON/OFF operation button.

STEP 3 Press the TEMP. setting buttons to change the temperature

setting to the desired temperature.
Adjustable temperature range:
30 °C max. or 86 °F max.
16 °C min. 60 °F min.

STEP 4 Set the FAN SPEED selector button to the setting you want.

STEP 5 Press the FLAP button and set the airflow direction as desired.
(Refer to “ADJUSTING THE AIRFLOW DIRECTION” on
page 21.)

To stop the air conditioner, press the ON/OFF operation button again.

NOTE When multiple indoor units are used and units in other rooms are already operating, they
will be set to the same mode of operation as the operating indoor units.

13
 OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
NOTE • Choose the best position in the room for the remote controller, which also acts
as the sensor for room comfort and transmits the operating instructions. Once
you’ve found this best position, always keep the remote controller there.

• This appliance has a built-in 5-minute time delay circuit to ensure reliable
operation. When the operation button is pressed, the compressor will start
running within three minutes. In the event of power failure, the unit will stop.

3. Adjusting the Fan Speed

A. Automatic fan speed Simply set the FAN SPEED selector button to the position.
This automatically sets the best fan speed for the room temperature.

B. Manual fan speed If you want to adjust fan speed manually during operation, just set the FAN
SPEED selector button as desired. [ , , or ]

14
 OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)

4. Night Setback Mode

Night Setback Mode is used for saving energy.

Press the NIGHT SETBACK button while unit is operating.

The mark appears in the display.

To release the night setback function, press the NIGHT SETBACK button again.
NOTE
Pressing the MODE selector button cancels Night Setback mode.

A. In Cooling and DRY

Mode: ( and ) When the night setback mode is selected, the air conditioner automatically
raises the temperature setting 2 °F when 30 minutes have passed after the
selection was made, and then another 2 °F after another 30 minutes have
passed, regardless of the indoor temperature when night setback was
selected. This enables you to save energy without sacrificing comfort. This
function is convenient when gentle cooling is needed.

2 °F
Setting
temperature 2 °F

Press the NIGHT 30 min. 30 min. Time

SETBACK button

B. In Heating Mode: ( )
When the night setback mode is selected, the air conditioner automatically
lowers the temperature setting 4 °F when 30 minutes have passed after the
selection was made, and then another 4 °F after another 30 minutes have
passed, regardless of the indoor temperature when night setback was
selected. This enables you to save energy without sacrificing comfort. This
function is convenient when gentle heating is needed.

Setting
4 °F
temperature
4 °F

Press the NIGHT 30 min. 30 min. Time

SETBACK button

15
 OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
5. QUIET Mode
QUIET Mode is used to reduce the fan sound of the indoor unit.

Press the QUIET button.

The mark appears in the display.

To cancel, press QUIET button again.

• In QUIET Mode, the fan rotates at a slower speed than the fan speed setting.
• If the unit is already operating with a very low airflow, the fan sound may not
change even if the QUIET button is pressed.

6. HIGH POWER Mode

HIGH POWER mode can be used to increase the output of the indoor unit for all
operation modes except automatic operation.
Press the HIGH POWER button while unit is operating.
The mark appears in the display.
To cancel, press HIGH POWER button again.
• When the HIGH POWER button is pressed, the unit operates at maximum
output for 30 minutes, regardless of the desired temperature. The fan speed is
1 step above “High”.
• HIGH POWER Mode cannot be used when the operation mode is in
Automatic Operation.
• QUIET Mode and HIGH POWER Mode cannot be used at the same time.

NOTE • Pressing the MODE selector button cancels HIGH POWER

mode.
• When set to High fan speed during heating operation, the fan
runs at High fan speed even though the mark is displayed.
• Depending on the operating conditions, the fan speed may be
increased by a small amount only.

16
 SPECIAL REMARKS

‘‘DRY’’ ( ) Operation

How it works? • Once the room temperature reaches the level that was set, the unit’s operation
frequency is changed automatically.
• During DRY operation, the fan speed automatically runs at lower speed for
providing a comfortable breeze.
• ‘‘DRY’’ operation is not possible if the indoor temperature is 59 °F or less.

Heating ( ) Operation

Heating performance • Because this air conditioner heats a room by drawing in the heat of the
outside air (heat pump system), the heating efficiency will fall off when the
outdoor temperature is very low. If sufficient heat cannot be obtained with this
air conditioner, use another heating appliance together with it.

Defrosting • When the outdoor temperature is low, frost or ice may form on the heat
exchanger coil, reducing heating performance. When this happens, a
microcomputer defrosting system operates. At the same time, the fan on the
indoor unit stops and the OPERATION lamp lights red and orange alternately
until defrosting is completed. Heating operation restarts after several minutes.
(This interval will vary slightly depending upon the outdoor temperature and
the way in which frost forms.)

Cold draft prevention • For several minutes after the start of heating operation, the indoor fan runs at
a lower speed until the indoor heat exchanger coil has warmed up sufficiently.
However, the fan may remain stopped when the room temperature is low. This
is because the COLD DRAFT PREVENTION SYSTEM is in operating.

• In the event of power failure, the unit will stop. When the power is resumed,
Power failure during the unit will restart automatically within 15 minutes by the remote controller.
operation

Clicking Sound

Clicking sound is heard from • In heating or cooling operation, any plastic parts may expand or shrink due to
the air conditioner a sudden temperature change. In this event, a clicking sound may occur. This
is normal, and the sound will soon disappear.

• The remote controller sends the setting condition to the air conditioner
Remote Controller regularly at five minute intervals.

17
 SETTING THE TIMER

NOTE In the descriptions below, the following settings are used for the temperature and
time indicator selector button on the bottom front section of the remote controller.
• Temperature: °F
• Time: AM, PM

1. How to set the present (Example) To set to 10:30 pm.

time

Operation Indication

1. Press the CLOCK button once if The time indication alone flashes.
the time indicator is not flashing.

2. Press the Advance, Return ( , The time can be set in 1-minute

) button until PM 10:30 is increments. Holding down the button
displayed. advances the time rapidly in 10-minute
increments.

3. Press the CLOCK button again. This completes the setting of the
current time.

2. How to set the OFF time (Example) To stop the air conditioner at 11:00 am.

Operation Indication

1. Press the OFF TIME setting The timer indication is displayed,

button once. and the present OFF time is shown.

2. Press the Advance, Return ( , The timer indication blinks.

) button until AM 11:00 is The time can be set in 10-minute
displayed. increments. Holding down the button
advances the time rapidly in 10-minute
increments.

3. Wait a few seconds, and then the The timer indication stops
setting is complete. blinking and the present time is
displayed.

18
 SETTING THE TIMER (CONTINUED)
3. How to set the ON time (Example) To start operation at 7:10 am.

Operation Indication

1. Press the ON TIME setting The timer indication is

button once. displayed, and the present ON time
is shown.

2. Press the Advance, Return ( , The timer indication blinks.

) button until AM 7:10 is The time can be set in 10-minute
displayed. increments. Holding down the
button advances the time rapidly in
10-minute increments.

3. Wait a few seconds, and then The timer indication stops

the setting is complete. blinking and the present time is
displayed.

4. How to set DAILY ON/OFF (Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am.
REPEAT timer

10:30 pm. 7:10 am. 11:00 am.

Present time ON OFF

Operation Indication

1. Set the timer ON/OFF times as The present time 10:30 pm. and
shown in 2-1, 2, 3 and 3-1, 2, 3. are displayed.

NOTE • The ON/OFF combination timer uses the current time as

the reference, and it is activated starting from whichever
set time comes first.
• With the ON/OFF combination timer, the settings are
repeated every day.
• You can check the timer ON/OFF times after you have set
them by pressing the ON TIME and OFF TIME setting
buttons.

To cancel a timer program • Press the CANCEL button.

• When either an ON or OFF timer is to be canceled, press the button
corresponding to the timer whose program is to be canceled, and then press
the CANCEL button.

• The airflow direction, fan speed and temperature setting can be changed after
NOTE
a timer program has been set even when the unit is stopped. Even when
operation is stopped during an ON timer program, the unit will start operating
when the set time is reached provided that the program is not canceled.
• When the ON timer and OFF timer are set to the same time, the timer
operates as if it is turned off.

19
 USING THE 1-HOUR OFF TIMER
1. 1-Hour OFF Timer This function causes the unit to operate for one hour and then stop,
regardless of whether the unit is on or off when this button is pressed.
The indicator in the display indicates that this function is operating.

Setting procedure:
Regardless of whether the unit is operating or stopped, press the 1 HR. TIMER
button.
appears in the display.

Cancellation procedure:
Press the ON/OFF operation button to turn the unit off, wait for the unit to stop
operating, and then press the ON/OFF operation button again.
The 1-Hour Timer function is now cancelled and the unit operates normally.

NOTE • If, while the 1-Hour Timer function is operating, the 1HR. TIMER button is
pressed once to cancel the function and then again, the unit continues to
operate for one hour from that point in time and then stops.
• It is not possible to use the OFF Timer and 1-Hour OFF Timer together.
Whichever function is set last takes precedence. If the 1 HR. TIMER button is
pressed while the TIMER OFF function operates, the OFF Timer is cancelled
and the unit will stop operating one hour later.

2. Operation together with the The 1-Hour OFF Timer setting is given priority over the DAILY ON/OFF REPEAT
DAILY ON/OFF REPEAT Timer setting.

TIPS FOR ENERGY SAVING

Avoid • Do not block neither the air intake nor the air outlet. It may cause less
performance, and may leads to malfunctions.
• Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If
the walls and ceiling of the room are warmed by the sun, it will take longer to
cool the room.

Do • Always try to keep the air filter clean. (Refer to “CARE AND CLEANING”.) A
clogged filter will impair the performance of the unit.
• To prevent conditioned air from escaping, keep windows, doors and any other
openings closed.

20
 ADJUSTING THE AIRFLOW DIRECTION
1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes with your
hands to the left or right.

When the humidity is high, the vertical vanes should be in the front
CAUTION position during the cooling or dehumidifying operation. If the vertical
vanes are positioned all of the way to the right or left, condensation may
begin to form around the air vent and drip down.

2. Vertical The vertical airflow can be adjusted by moving the flap with the remote controller.
Do not move the flap with your hands. Confirm that the remote controller has
been turned on. Use the FLAP button to set either the sweep function or one of
the six airflow direction settings.

SWEEP
COOL
DRY SWEEP

HEAT
A. Sweep function B. Setting the airflow manually
The flap starts moving up and down to Referring to the above illustration, use the
deliver air over the sweep range. FLAP button to set the airflow direction
within the range used during the heating,
C. Auto flap function cooling, or dehumidifying operation.
The flap is set to the recommended
position.

NOTE • The flap automatically closes when the unit is off.

• During the heating operation, the fan speed will be very low and the flap will
be in the horizontal position (position ) until the air being blown out of the
unit begins to warm. Once the air warms up, the flap position and fan speed
change to the settings specified with the remote controller.

• Use the FLAP button on the remote controller to adjust the position of
CAUTION the flap. If you move the flap by hand, the flap position according to the
remote controller and the actual flap position may no longer match. If
this should happen, shut off the unit, wait for the flap to close, and then
turn on the unit again; the flap position will now be normal again.
• Do not have the flap pointed down during cooling operation.
Condensation may begin to form around the air vent and drip down.

21
 OPERATION WITHOUT THE REMOTE CONTROLLER
INDOOR UNIT If you have lost the remote controller or it has trouble, follow the steps below.

When the air conditioner is not running

Each time the OPERATION button is pressed, the type of operation conducted is
indicated by the changing color of the OPERATION lamp. Press the button and
select the lamp color that suits your preference for operation.
Cooling operation Heating operation Stop
(green) (red) (lamp off)

OPERATION button

NOTE The temperature is set to the room temperature minus 4 °F during the cooling
operation and to the room temperature plus 4 °F during the heating operation,
and the fan speed and flap are set to Auto.

CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect
the power before cleaning.
2. Do not pour water on the indoor unit to clean it. This will damage the
internal components and cause an electric shock hazard.

Casing and Grille (Indoor Unit) Clean the casing and grille of the indoor unit with a vacuum cleaner brush, or
wipe them with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid
detergent. When cleaning the grille, be careful not to force the vanes out of place.

1. Never use solvents, or harsh chemicals when cleaning the indoor unit.
CAUTION Do not wipe the plastic casing using very hot water.
2. Some metal edges and the fins are sharp and may cause injury if
handled improperly; be especially careful when you clean these parts.
3. The internal coil and other components of the outdoor unit must be
cleaned every year. Consult your dealer or service center.

22
 CARE AND CLEANING (CONTINUED)
Filter The filter behind the air intake grille should be checked and cleaned at least once
every two weeks.

How to remove the filter 1. Grasp both ends of the air Air intake grille
intake grille, and remove it by
opening towards the front and
pulling towards you.

2. Remove the filter attached to

the rear of the air intake grille. filter

Cleaning Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter,
wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it.

How to replace the filter 1. With the FRONT mark of the

filter at the front, align the two filter
indentions near the mark with
the hooks at the rear of the air
intake grille, and then mount
the filter.

FRONT mark
Hook
2. Allow the edge of the air intake
grille to slide into the top of the Groove
indoor unit, and then insert it
all the way inside. Pin
Air intake grille

3. Press in the bottom right and Air intake grille

left corners of the air intake
grille to attach the indoor unit.

NOTE Attach so that the round pins at the top right and left corners of the air intake grille
are inserted into the grooves at the top right and left of the indoor unit.

23
 CARE AND CLEANING (CONTINUED)
Cleaning the main unit • Wipe clean using a soft, dry cloth.
and Remote Controller • To remove stubborn dirt, moisten a cloth in warm water no hotter than 104 °F, wring
thoroughly, and then wipe.
• The air intake grille can be removed in order to wash it with water.
Removing and Refer to “How to remove the filter” and “How to replace the filter” on page 23.
remounting the air
intake grille
When using a footstool or the like, be careful not to let it tip over.
CAUTION

Washing the grille • Clean the grille gently using a soft sponge, or the like. Then wipe away any remaining
with water moisture.
• Neutral detergent may be used to remove stubborn dirt. Then rinse thoroughly with
water and wipe away any remaining moisture.

WIRED REMOTE CONTROLLER

A separately sold wired remote controller (CZ-RD515U) used with this air conditioner is
also available. If you wish to use the wired remote control function, you will need to
purchase both the optional wired remote controller and its connection kit (CZ-RC515U).

24
 TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)
If your air conditioner does not work properly, first check the following points before requesting service. If it still does not
work properly, contact your dealer or service center.
Trouble Possible Cause Remedy

Air conditioner does not run at all. 1. Power failure. 1. Restore power.

2. Leakage circuit breaker tripped. 2. Contact service center.

3. Line voltage is too low. 3. Consult your electrician or dealer.

4. Batteries in remote controller have 4. Replace batteries.

run down.

OPERATION lamp blinks and air Trouble in system. Contact service center.
conditioner does not operate.

Compressor runs but soon stops. Obstruction in front of condenser coil. Remove obstruction.
(Outdoor Unit)

Poor cooling (or heating) performance. 1. Dirty or clogged air filter. 1. Clean air filter to improve airflow.

2. Heat source or many people in 2. Eliminate heat source if possible.

room.

3. Doors and/or windows are open. 3. Shut them to keep the heat (or cold)
out.

4. Obstacle near air intake or air 4. Remove it to ensure good airflow.

discharge port.

5. Thermostat is set too high for 5. Set the temperature lower (or
cooling (or too low for heating). higher).

6. (Outdoor temperature is too low for 6. (Consult your dealer or try to use
heating.) another heat appliance.)

Clicking sound is heard from the air In heating or cooling operation, any This is normal, and the sound will soon
conditioner. plastic parts may expand or shrink due disappear.
to a sudden temperature change. In
this event, a clicking sound may occur.

OPERATION lamp lights but outdoor The use of cellular phones near the air 1. Turn off the power then restart the
unit will not run. conditioner may cause disturbance to air conditioner after a while.
its normal operation.
2. Consult your dealer.

OPERATING RANGE
The air conditioner is operable within the temperature ranges as listed below:

Temperature Indoor air temperature Outdoor air temperature

COOLING Max. 95 °F DB / 71 °F WB 115 °F DB

Min. 67 °F DB / 57 °F WB 14 °F DB

HEATING Max. 80 °F DB / 67 °F WB 75 °F DB / 65 °F WB

Min. – DB / – WB – DB / 0 °F WB

25
 SPECIFICATIONS

Indoor Unit
Model No.
CS-MKE7NKU CS-MKE9NKU CS-MKE12NKU
Power Source Single-phase, 208-230 V, 60 Hz
Cooling Capacity kW 2.20 2.65 3.50
BTU/h 7,500 9,000 11,900
Heating Capacity kW 2.50 3.60 4.20
BTU/h 8,500 12,200 14,300
Operation Cooling Operation (H/M/L) dB(A) 33/30/27 34/31/28 36/33/29
Sound Heating Operation (H/M/L) dB(A) 33/30/27 34/31/28 34/31/29
Unit Dimensions (H×W×D) 11-7/32×32-15/32×7-7/16 11-7/32×32-15/32×7-7/16 11-7/32×32-15/32×7-7/16
(Indoor unit : Include panel) inch(mm) (285×825×189) (285×825×189) (285×825×189)
Net Weight lbs.(kg) 19.8(9.0) 19.8(9.0) 19.8(9.0)

Outdoor Unit
Model No.
CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU
Power Source Single-phase, 208-230 V, 60 Hz
kW 5.45 [ 2.90 ~ 5.45 ] 6.80 [ 2.90 ~ 6.80 ] 9.00 [ 2.90 ~ 9.00 ]
Cooling Capacity
BTU/h 18,600 [ 9,800 ~ 18,600 ] 23,200 [ 9,800 ~ 23,200 ] 30,600 [ 9,800 ~ 30,600 ]
kW 7.30 [ 3.40 ~ 7.30 ] 8.60 [ 3.40 ~ 8.60 ] 9.40 [ 3.40 ~ 9.40 ]
Heating Capacity
BTU/h 24,800 [ 11,600 ~ 24,800 ] 29,200 [ 11,600 ~ 29,200 ] 32,000 [ 11,600 ~ 32,000 ]
Operation Cooling Operation (Hi) dB(A) 50 50 53
Sound Heating Operation (Hi) dB(A) 52 52 52
Unit Dimensions (H×W×D) 29-1/8×35-7/16×12-19/32 29-1/8×35-7/16×12-19/32 35-1/32×35-7/16×12-19/32
inch(mm) (740×900×320) (740×900×320) (890×900×320)
Net Weight lbs.(kg) 143.3(65.0) 143.3(65.0) 180.8(82.0)

26
APPENDIX B Operating Instructions

CS-MKE18NKU
CS-MKE24NKU
(852-6-4181-218-00-2)

A-2
 Operating Instructions
Split System Air Conditioner
Model No.
Indoor Units Outdoor Units
CS-MKE18NKU CU-3KE19NBU
CS-MKE24NKU CU-4KE24NBU
CU-4KE31NBU
This air conditioner uses the refrigerant R410A.

Before operating the unit, read these operating instructions thoroughly and keep them for future reference.

1006 Kadoma, Kadoma City, Osaka, Japan

85264181218002 CV6233187600
FEATURES
This air conditioner is an inverter type unit that automatically adjusts capability as appropriate. Details on these functions
are provided below; refer to these descriptions when using the air conditioner.
• Microprocessor Controlled Operation • Air Sweep Control
The interior compartment of the remote controller contains This function moves a flap up and down in the air outlet,
several features to facilitate automatic operation, easy directing air in a sweeping motion around the room and
logically displayed for easy use. providing comfort in every corner.
• Simple One-touch Remote Controller • Auto. Flap Control
The remote controller has several features to facilitate This automatically sets the flap to the optimum position
automatic operation. during heating, cooling, and drying operation.
• 24-Hour ON or OFF Timer • Hot Start Heating System
This timer can be set to automatically turn the unit on or off Right from the start, the air is warm and comfortable. This
at any time within a 24 hour period. system prevents any cold blasts at the beginning while the
• 1-Hour OFF Timer heat pump is warming up, or even defrosting.
This timer can be set to automatically turn off the unit at • Automatic Restart Function for Power Failure
any time after one hour. Even when power failure occurs, preset programmed
• Night Setback operation can be reactivated once power resumes.
This function saves energy by controlling operation to • High Power Operation
provide a quieter operating sound than normal. If not in Auto Operation, the unit operates at maximum
• Automatic and 3-step Fan Speed output for 30 minutes, regardless of the desired
Auto/High/Medium/Low temperature.
The fan speed is 1 step above “High”.
• Quiet Operation
The fan rotates slower than the fan speed setting to provide
a quieter operating sound.

CONTENTS
Page Page
FEATURES................................................................................. 2 SPECIAL REMARKS ................................................................17
PRODUCT INFORMATION ........................................................ 2 SETTING THE TIMER ..............................................................18
SAFETY PRECAUTIONS........................................................... 2 USING THE 1-HOUR OFF TIMER ...........................................20
INSTALLATION LOCATION........................................................ 3 TIPS FOR ENERGY SAVING ...................................................20
ELECTRICAL REQUIREMENTS ............................................... 3 ADJUSTING THE AIRFLOW DIRECTION ...............................21
SAFETY INSTRUCTIONS.......................................................... 3 OPERATION WITHOUT THE REMOTE CONTROLLER..........22
NAMES OF PARTS .................................................................... 5 CARE AND CLEANING ............................................................22
USING THE REMOTE CONTROLLER .................................... 10 WIRED REMOTE CONTROLLER ............................................24
OPERATION WITH THE REMOTE CONTROLLER................. 12 TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) .......25
1. Automatic Operation ................................................. 12 OPERATING RANGE................................................................25
2. Manual Operation...................................................... 13 SPECIFICATIONS.....................................................................26
3. Adjusting the Fan Speed ........................................... 14
4. Night Setback Mode.................................................. 15
5. QUIET Mode ............................................................. 16
6. HIGH POWER Mode................................................. 16

PRODUCT INFORMATION SAFETY PRECAUTIONS

If you have problems or questions concerning your Air The following symbols used in this manual, alert you
Conditioner, you will need the following information. Model to potentially dangerous conditions to users, service
and serial numbers are on the nameplate on the bottom of personnel or the appliance:
the cabinet.
This symbol refers to a hazard or
Model No. __________________________________ unsafe practice which can result in
severe personal injury or death.
Serial No. ___________________________________
This symbol refers to a hazard or
Date of purchase _____________________________ CAUTION
unsafe practice which can result in
Dealer’s address _____________________________ personal injury or product or property
damage.
Phone number _______________________________

2
 INSTALLATION LOCATION
• We recommend that this air conditioner be installed properly by qualified
installation technicians in accordance with the Installation Instructions
provided with the unit.
• Before installation, check that the voltage of the electric supply in your home or
office is the same as the voltage shown on the nameplate.

• Do not install this air conditioner where there are fumes or flammable
gases, or in an extremely humid space such as a greenhouse.
• Do not install the air conditioner where excessively high heat-
generating objects are placed.

Avoid: To protect the air conditioner from heavy corrosion, avoid installing the outdoor
unit where salty sea water can splash directly onto it or in sulphurous air near a
spa.

ELECTRICAL REQUIREMENTS
1. All wiring must conform to the local electrical codes. Consult your dealer or a
qualified electrician for details.
2. Each unit must be properly grounded with a ground (or earth) wire or through
the supply wiring.
3. Wiring must be done by a qualified electrician.

NOTE Pull off the power plug from a receptacle, or switch off the breaker, or switch off
the power disconnecting mean to isolate the air conditioner from the main power
supply when not in use for a long time.

SAFETY INSTRUCTIONS
• Read this Instruction Manual carefully before using this air conditioner. If
you still have any difficulties or problems, consult your dealer for help.
• This air conditioner is designed to give you comfortable room conditions.
Use this only for its intended purpose as described in this Instruction
Manual.

• Confirm to authorized dealer or specialist on usage of specified

refrigerant type.
Using of refrigerant other than the specified type may cause product
damage, burst and injury etc.
• Never touch the unit with wet hands.
• Never use or store gasoline or other flammable vapor or liquid near the
air conditioner — it is very dangerous.
• Do not use this appliance in a potentially explosive atmosphere.
• This air conditioner has no ventilator for intaking fresh air from
outdoors. You must open doors or windows frequently when you use
gas or oil heating appliances in the same room, which consume a lot of
oxygen from the air. Otherwise there is a risk of suffocation in an
extreme case.
• Do not swallow the battery.
• After removing the battery from remote controller, keep it away from the
reach of children. The battery can cause death by suffocation if
swallowed.
• When inserting the battery, make sure the polarities (+ and -) are correct.

3
 • To prevent possible hazards from insulation failure, the unit must
be grounded.
• Do not clean inside the indoor and outdoor units by users. Engage
authorized dealer or specialist for cleaning.
• In case of malfunction of this appliance, do not repair by yourself.
Contact to the sales dealer or service dealer for a repair.
• Refrigerant gas leakage may cause fire.
• For safety, be sure to turn the air conditioner off and also to
disconnect the power before cleaning.
• Pull off the power plug from a receptacle, or switch off the breaker, or
switch off the power disconnecting mean to isolate the air conditioner
from the main power supply in case of emergency.

• Do not turn the air conditioner on and off from the power mains switch.
CAUTION Use the ON/OFF operation button.
• Do not stick anything into the air outlet of the outdoor unit.
This is dangerous because the fan is rotating at high speed.
• Do not touch the air inlet or the sharp aluminum
fins of the outdoor unit. You may get injured.
• Keep the fire alarm and the air outlet at least 1.5m away from the unit.
• Do not let children play with the air conditioner.
• Do not cool or heat the room too much if babies or invalids are present.
• Do not sit or step on the unit.
You may fall down accidentally.
• Do not stick any object
into the FAN CASE.
You may be injured and
the unit may be damaged.

• This device complies with part 15 of the FCC Rules.

NOTICE
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause
undesired operation.
• This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
• FCC Caution: To assure continued compliance, follow the attached installation
instructions. Any changes or modifications not expressly approved by the
party responsible for compliance could void the user's authority to operate this
equipment.

4
 NAMES OF PARTS
Air Intakes
INDOOR UNIT

Air Outlet

Remote Controller

Drain Hose

Refrigerant Tubes

OUTDOOR UNIT

Air Outlet

This illustration is based on the external view of a standard model.

NOTE
Consequently, the shape may differ from that of the air conditioner which you
have selected.

This air conditioner consists of an indoor unit and an outdoor unit. You can
control the air conditioner with the remote controller.

Air Intake Air from the room is drawn into this section and passes through air filters which
remove dust.

Air Outlet Conditioned air is blown out of the air conditioner through the air outlet.

Remote Controller The remote controller controls power ON/OFF, operation mode selection,
temperature, fan speed, timer setting, and air sweeping.

Refrigerant Tubes The indoor and outdoor units are connected by copper tubes through which
refrigerant gas flows.

Drain Hose Moisture in the room condenses and drains off through this hose.

Outdoor (Condensing) Unit The outdoor unit contains the compressor, fan motor, heat exchanger coil, and
other electrical components.

5
 UNIT DISPLAY AND OPERATION BUTTON

INDOOR UNIT

IMPORTANT
OPERATION lamp
TIMER lamp
Avoid using radio equipment
QUIET QUIET lamp
such as mobile phone near
(within 4 ft. (1.2 m)) the remote
control receiver. Some radio OPERATION button
equipment may cause
malfunction of the unit.

If the trouble happens,

disconnect power and restart REMOTE CONTROL receiver
the air conditioner after a few
minutes.

REMOTE CONTROL receiver This section picks up infrared signals from the remote controller (transmitter).

OPERATION button When the remote controller cannot be used, pressing this button enables heating
and cooling operation.

Each time this button is pressed, the type of operation conducted is indicated by
the changing color of the OPERATION lamp. Press the button and select the
lamp color that suits your preference for operation.
Cooling operation Heating operation Stop
(green) (red) (lamp off)

OPERATION lamp This lamp lights when the system is in the continuous AUTO (red or green),
HEAT (red), DRY (orange) and COOL (green) mode.
The OPERATION lamp lights up red and orange alternately when the system is
defrosting.

TIMER lamp This lamp lights when the system is being controlled by the timer.

QUIET lamp This lamp lights during operation in the QUIET mode.

NOTE The unit’s display lamps are dimmed during operation in the NIGHT SETBACK
mode.

6
 REMOTE CONTROLLER (DISPLAY)

Displayed when transmitting data

Displayed when indoor unit

sensor is in use
Displayed when setting
temperature
Displayed when temperature is
shown

Displayed when setting timer

Displayed when the

time display is set to
12-hour time.

Symbols

(1) Operation mode (4) Timer

24-hour clock with ON/OFF
AUTO .........................................
program Timer ...........................

HEAT ..........................................
ON Timer. ..................................

MILD DRY ..................................

OFF Timer. ................................

COOL ......................................... 1-hour OFF Timer. .....................

(2) Fan speed

(5) NIGHT SETBACK......................
Automatic operation ...................

(6) Confirmation of transmission .....

HIGH .........................................

MEDIUM..................................... (7) Auto. flap indication....................

LOW ........................................... Flap angle indication..................

Sweep indication........................
(3) Temperature setting
60 – 86 °F
When set to 80 °F
temperature indication................ (8) High power operation.................

(9) Quiet operation ..........................

7
 REMOTE CONTROLLER
Transmitter Sensor

Display (Cover closed)

QUIET button ON/OFF operation button

1 HR. TIMER button
Temperature setting buttons (TEMP.)

MODE selector button

FAN SPEED selector button NIGHT SETBACK button
FLAP button HIGH POWER button
ON TIME Advance button OFF TIME
Advance button
setting setting
buttons Return button Return button
buttons
CANCEL button CLOCK button
SENSOR button Time display selector button

ADDRESS switch ACL button

Temperature display
selector button

NOTE The illustration above pictures the remote controller after the cover has been
opened.

Transmitter When you press the buttons on the remote controller, the mark appears in the
display to transmit the setting changes to the receiver in the air conditioner.

Sensor A temperature sensor inside the remote controller senses the room temperature.

Display Information on the operating conditions is displayed while the remote controller is
switched on. If the unit is turned off, FLAP setting and FAN SPEED setting are
not displayed.

QUIET button : When you press this button, the fan rotates slower than the fan speed
setting to provide a quieter operating sound.

ON/OFF operation button This button is for turning the air conditioner on and off.

1 HR. TIMER button : When you press this button, regardless of whether the unit is operating or
(1-HOUR OFF TIMER) stopping, the unit operates for one hour and then shuts down.

Temperature setting buttons Press the button to increase the set temperature.
(TEMP.) Press the button to reduce the set temperature.
The temperature setting changes by 1 °C or 2 °F each time one of the TEMP.
buttons is pressed.

8
 REMOTE CONTROLLER (CONTINUED)
MODE selector button Use this button to select AUTO, HEAT, DRY or COOL mode.
(AUTO) : The air conditioner calculates the difference between the thermostat
setting and room temperature, and automatically selects ‘‘COOL’’ or
‘‘HEAT’’ mode as appropriate.
(HEAT) : The air conditioner makes the room warmer.
(DRY) : The air conditioner reduces the humidity in the room.
(COOL) : The air conditioner makes the room cooler.

NOTE When multiple indoor units are used and units in other rooms are already operating, they
will be set to the same mode of operation as the operating indoor units.

FAN SPEED selector button : The air conditioner automatically decides the fan speeds.
: High fan speed
: Medium fan speed
: Low fan speed

NIGHT SETBACK button For details, see “4. Night Setback Mode”. When you press this button in the
HEAT, DRY or COOL mode, the mark appears in the display, and the remote
controller will automatically adjust the set temperature to save energy.

FLAP button Press this button either to select the setting of the airflow direction to the auto.
flap in each mode or one of the six possible positions manually or to select the
sweep function which moves the flap up and down automatically.
: Auto flap setting: If selected in a heating operation, the flap is set to
position (3) in the following chart. If selected in a cooling or dry operation,
the flap is set at position (7) in the following chart.
: The airflow direction can be set manually. (six positions)
: The flap moves up and down automatically.

NOTE When you press the FLAP button, the air flow direction will be changed one by
one as follows.

SWEEP

HIGH POWER button : If this button is pressed during HEAT, DRY or COOL operation, the unit
operates at maximum output for 30 minutes, regardless of the desired
temperature.
The fan speed is 1 step above “High”.

ON TIME/OFF TIME setting No display: The timer does not operate.

buttons : The air conditioner starts at the set time.
: The air conditioner stops at the set time.
: The air conditioner stops and starts, or starts and stops, at the
set times every day. For details, see “SETTING THE TIMER”.

SENSOR button When you press this button (use a small-tipped object such as a ballpoint pen),
the mark will appear at the display. And the room temperature is detected by
the sensor which is built into the indoor unit and the air conditioner is controlled
accordingly.

NOTE If the remote controller is located near a heat source, such as a space heater or
in direct sunlight, press the SENSOR button to switch to the sensor on the indoor
unit.

NOTE The indoor fan runs continuously when the system is in normal operation. It does not turn off when the
desired room temperature is reached. If Night Set Back mode is selected, the fan will turn off
intermittently during cooling operation in order to control air flow.

9
 REMOTE CONTROLLER (CONTINUED)
Temperature Display Selector This switches the temperature display between °C and °F.
button

Time Display Selector button This switches the time display between 24-hour time and 12-hour time.

ACL button (ALL CLEAR) Puts the remote controller into pre-operation status. Always press this button
after replacing the batteries.

ADDRESS switch • The address switch changes to prevent mixing of signals from remote
controller’s when two air conditioners are installed next to each other.
Normally, the address switch is set to A. For more information, please contact
the dealer where you made the purchase.
• Normally, the tabs on the remote controller should not be bent.

NOTE The remote controller sends the temperature signal to the air conditioner regularly at five minute intervals.
If the signal from the remote controller stops for more than 15 minutes due to the loss of the remote
controller or other trouble, the air conditioner will switch to the temperature sensor which is built into the
indoor unit and control the room temperature. In these cases, the temperature around the remote
controller may differ from the temperature detected at the air conditioner’s position.

USING THE REMOTE CONTROLLER

How to Install Batteries

1. Slide the cover in the direction indicated by the
arrow and remove it.
2. Install two AAA alkaline batteries. Make sure the
batteries point in the direction marked in the
battery compartment.

ACL button 3. Use a thin object such as the tip of a pen to press
the ACL button.

• The batteries last about six months, depending on how much you use the
CAUTION
remote controller. Replace the batteries when the remote controller’s display
fails to light, or when the remote controller cannot be used to change the air
conditioner’s settings.
• Use two fresh leak-proof type-AAA alkaline batteries.
• In replacing batteries, follow the instructions as mentioned in the sub-section
“How to Install Batteries”.
• If you do not use the remote controller more than 1 month, take out the
batteries.
• Dispose of the used batteries at the designated location in compliance with the
applicable local ordinances.

Information for Users on Collection and Disposal of Old Equipment and used Batteries

[Information on Disposal in other Countries Note for the battery symbol (bottom two
outside the European Union] symbol examples):
These symbols are only valid in the European This symbol might be used in combination with
Union. If you wish to discard these items, a chemical symbol. In this case it complies with
please contact your local authorities or dealer the requirement set by the Directive for the
and ask for the correct method of disposal. chemical involved.

10
 USING THE REMOTE CONTROLLER (CONTINUED)

How to Use the Remote When using the remote controller, always point the unit’s transmitter head directly
Controller at the air conditioner’s receiver.
Air Conditioner
(Indoor unit)

Receiver
Remote Controller (Transmitter head)

Remote Controller Installation The remote controller may be operated either from a non-fixed position or from a
Position wall-mounted position. To ensure that the air conditioner operates correctly, do
not install the remote controller in the following places:

• In direct sunlight
• Behind a curtain or other places where it is covered
• More than 26 ft (8 m) away from the air conditioner
• In the path of the air conditioner’s airstream
• Where it may become extremely hot or cold
• Where it may be subject to electrical or magnetic noise
• Where there is an obstacle between the remote controller and air conditioner
(since a check signal is sent from the remote controller every 5 minutes)

Mounting the Remote Before mounting the remote controller, press the ON/OFF operation button at the
Controller mounting location to make sure that the air conditioner operates from that
location. The indoor unit should make a beeping sound to indicate that it has
received the signal.

Rear Side
Remote Control Holder

Press

Set in
place Hole

Mounting Screws • To prevent loss of the remote controller, you can connect
5/32 x 5/8" (4 x 16 mm) the remote controller to the holder by passing a string
(included) through the remote controller and attachment hole.

To take out the remote controller, pull it forward.

When Holding the Remote • When using the remote controller and during air conditioner operation, the
Controller transmitter on the remote controller should be pointed towards the receiver on
the indoor unit.
• Make sure that there are no objects between the remote controller and
receiver which could block the signal.

11
 OPERATION WITH THE REMOTE CONTROLLER
1. Automatic Operation The air conditioner calculates the difference between the thermostat setting and
room temperature, and automatically determines the mode to operate under
cooling or heating. Then, the air conditioner continuously operates under the
mode selected at initial operation.

STEP 2

STEP 1

NOTE Check that the circuit breaker on the power panel is turned on.

Once mode is selected and the unit is preset by following the steps below, you
can have the air conditioner automatically bring the room to the desired
temperature simply by pressing the ON/OFF operation button.

STEP 1 Press the MODE selector button to .

STEP 2 Press the ON/OFF operation button.

To stop the air conditioner, press the ON/OFF operation button again.

NOTE • To change the temperature setting; press the temperature setting buttons and
change the setting to the desired temperature.

12
 OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
2. Manual Operation

STEP 2

STEP 3

STEP 1
STEP 4

STEP 5

NOTE Check that the circuit breaker on the power panel is turned on.

If the automatic operation settings of the unit do not meet your needs, press the
setting buttons as described below and change the settings as desired.

STEP 1 Press the MODE selector button and select the desired mode.
For heating operation o
For dehumidifying operation o
For cooling operation o

STEP 2 To start the air conditioner, press the ON/OFF operation button.

STEP 3 Press the TEMP. setting buttons to change the temperature

setting to the desired temperature.
Adjustable temperature range:
30 °C max. or 86 °F max.
16 °C min. 60 °F min.

STEP 4 Set the FAN SPEED selector button to the setting you want.

STEP 5 Press the FLAP button and set the airflow direction as desired.
(Refer to “ADJUSTING THE AIRFLOW DIRECTION” on
page 21.)

To stop the air conditioner, press the ON/OFF operation button again.

NOTE When multiple indoor units are used and units in other rooms are already operating, they
will be set to the same mode of operation as the operating indoor units.

13
 OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
NOTE • Choose the best position in the room for the remote controller, which also acts
as the sensor for room comfort and transmits the operating instructions. Once
you’ve found this best position, always keep the remote controller there.

• This appliance has a built-in 5-minute time delay circuit to ensure reliable
operation. When the operation button is pressed, the compressor will start
running within three minutes. In the event of power failure, the unit will stop.

3. Adjusting the Fan Speed

A. Automatic fan speed Simply set the FAN SPEED selector button to the position.
This automatically sets the best fan speed for the room temperature.

B. Manual fan speed If you want to adjust fan speed manually during operation, just set the FAN
SPEED selector button as desired. [ , , or ]

14
 OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
4. Night Setback Mode
Night Setback Mode is used for saving energy.

Press the NIGHT SETBACK button while unit is operating.

The mark appears in the display.

To release the night setback function, press the NIGHT SETBACK button again.
NOTE
Pressing the MODE selector button cancels Night Setback mode.

A. In Cooling and DRY

Mode: ( and ) When the night setback mode is selected, the air conditioner automatically
raises the temperature setting 2 °F when 30 minutes have passed after the
selection was made, and then another 2 °F after another 30 minutes have
passed, regardless of the indoor temperature when night setback was
selected. This enables you to save energy without sacrificing comfort. This
function is convenient when gentle cooling is needed.

2 °F
Setting
temperature 2 °F

Press the NIGHT 30 min. 30 min. Time

SETBACK button

B. In Heating Mode: ( )
When the night setback mode is selected, the air conditioner automatically
lowers the temperature setting 4 °F when 30 minutes have passed after the
selection was made, and then another 4 °F after another 30 minutes have
passed, regardless of the indoor temperature when night setback was
selected. This enables you to save energy without sacrificing comfort. This
function is convenient when gentle heating is needed.

Setting
4 °F
temperature
4 °F

Press the NIGHT 30 min. 30 min. Time

SETBACK button

15
 OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
5. QUIET Mode
QUIET Mode is used to reduce the fan sound of the indoor unit.

Press the QUIET button.

The mark appears in the display.

To cancel, press QUIET button again.

• In QUIET Mode, the fan rotates at a slower speed than the fan speed setting.
• If the unit is already operating with a very low airflow, the fan sound may not
change even if the QUIET button is pressed.

6. HIGH POWER Mode

HIGH POWER mode can be used to increase the output of the indoor unit for all
operation modes except automatic operation.
Press the HIGH POWER button while unit is operating.
The mark appears in the display.
To cancel, press HIGH POWER button again.
• When the HIGH POWER button is pressed, the unit operates at maximum
output for 30 minutes, regardless of the desired temperature. The fan speed is
1 step above “High”.
• HIGH POWER Mode cannot be used when the operation mode is in
Automatic Operation.
• QUIET Mode and HIGH POWER Mode cannot be used at the same time.

NOTE • Pressing the MODE selector button cancels HIGH POWER

mode.
• When set to High fan speed during heating operation, the fan
runs at High fan speed even though the mark is displayed.
• Depending on the operating conditions, the fan speed may be
increased by a small amount only.

16
 SPECIAL REMARKS

‘‘DRY’’ ( ) Operation

How it works? • Once the room temperature reaches the level that was set, the unit’s operation
frequency is changed automatically.
• During DRY operation, the fan speed automatically runs at lower speed for
providing a comfortable breeze.
• ‘‘DRY’’ operation is not possible if the indoor temperature is 59 °F or less.

Heating ( ) Operation

Heating performance • Because this air conditioner heats a room by drawing in the heat of the
outside air (heat pump system), the heating efficiency will fall off when the
outdoor temperature is very low. If sufficient heat cannot be obtained with this
air conditioner, use another heating appliance together with it.

Defrosting • When the outdoor temperature is low, frost or ice may form on the heat
exchanger coil, reducing heating performance. When this happens, a
microcomputer defrosting system operates. At the same time, the fan on the
indoor unit stops and the OPERATION lamp lights red and orange alternately
until defrosting is completed. Heating operation restarts after several minutes.
(This interval will vary slightly depending upon the outdoor temperature and
the way in which frost forms.)

Cold draft prevention • For several minutes after the start of heating operation, the indoor fan runs at
a lower speed until the indoor heat exchanger coil has warmed up sufficiently.
However, the fan may remain stopped when the room temperature is low. This
is because the COLD DRAFT PREVENTION SYSTEM is in operating.

• In the event of power failure, the unit will stop. When the power is resumed,
Power failure during the unit will restart automatically within 15 minutes by the remote controller.
operation

Clicking Sound

Clicking sound is heard from • In heating or cooling operation, any plastic parts may expand or shrink due to
the air conditioner a sudden temperature change. In this event, a clicking sound may occur. This
is normal, and the sound will soon disappear.

• The remote controller sends the setting condition to the air conditioner
Remote Controller regularly at five minute intervals.

17
 SETTING THE TIMER

NOTE In the descriptions below, the following settings are used for the temperature and
time indicator selector button on the bottom front section of the remote controller.
• Temperature: °F
• Time: AM, PM

1. How to set the present (Example) To set to 10:30 pm.

time

Operation Indication

1. Press the CLOCK button once if The time indication alone flashes.
the time indicator is not flashing.

2. Press the Advance, Return ( , The time can be set in 1-minute

) button until PM 10:30 is increments. Holding down the button
displayed. advances the time rapidly in 10-minute
increments.

3. Press the CLOCK button again. This completes the setting of the
current time.

2. How to set the OFF time (Example) To stop the air conditioner at 11:00 am.

Operation Indication

1. Press the OFF TIME setting The timer indication is displayed,

button once. and the present OFF time is shown.

2. Press the Advance, Return ( , The timer indication blinks.

) button until AM 11:00 is The time can be set in 10-minute
displayed. increments. Holding down the button
advances the time rapidly in 10-minute
increments.

3. Wait a few seconds, and then the The timer indication stops
setting is complete. blinking and the present time is
displayed.

18
 SETTING THE TIMER (CONTINUED)
3. How to set the ON time (Example) To start operation at 7:10 am.

Operation Indication

1. Press the ON TIME setting The timer indication is

button once. displayed, and the present ON time
is shown.

2. Press the Advance, Return ( , The timer indication blinks.

) button until AM 7:10 is The time can be set in 10-minute
displayed. increments. Holding down the
button advances the time rapidly in
10-minute increments.

3. Wait a few seconds, and then The timer indication stops

the setting is complete. blinking and the present time is
displayed.

4. How to set DAILY ON/OFF (Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am.
REPEAT timer

10:30 pm. 7:10 am. 11:00 am.

Present time ON OFF

Operation Indication

1. Set the timer ON/OFF times as The present time 10:30 pm. and
shown in 2-1, 2, 3 and 3-1, 2, 3. are displayed.

NOTE • The ON/OFF combination timer uses the current time as

the reference, and it is activated starting from whichever
set time comes first.
• With the ON/OFF combination timer, the settings are
repeated every day.
• You can check the timer ON/OFF times after you have set
them by pressing the ON TIME and OFF TIME setting
buttons.

To cancel a timer program • Press the CANCEL button.

• When either an ON or OFF timer is to be canceled, press the button
corresponding to the timer whose program is to be canceled, and then press
the CANCEL button.

• The airflow direction, fan speed and temperature setting can be changed after
NOTE
a timer program has been set even when the unit is stopped. Even when
operation is stopped during an ON timer program, the unit will start operating
when the set time is reached provided that the program is not canceled.
• When the ON timer and OFF timer are set to the same time, the timer
operates as if it is turned off.

19
 USING THE 1-HOUR OFF TIMER
1. 1-Hour OFF Timer This function causes the unit to operate for one hour and then stop,
regardless of whether the unit is on or off when this button is pressed.
The indicator in the display indicates that this function is operating.

Setting procedure:
Regardless of whether the unit is operating or stopped, press the 1 HR. TIMER
button.
appears in the display.

Cancellation procedure:
Press the ON/OFF operation button to turn the unit off, wait for the unit to stop
operating, and then press the ON/OFF operation button again.
The 1-Hour Timer function is now cancelled and the unit operates normally.

NOTE • If, while the 1-Hour Timer function is operating, the 1HR. TIMER button is
pressed once to cancel the function and then again, the unit continues to
operate for one hour from that point in time and then stops.
• It is not possible to use the OFF Timer and 1-Hour OFF Timer together.
Whichever function is set last takes precedence. If the 1 HR. TIMER button is
pressed while the TIMER OFF function operates, the OFF Timer is cancelled
and the unit will stop operating one hour later.

2. Operation together with the The 1-Hour OFF Timer setting is given priority over the DAILY ON/OFF REPEAT
DAILY ON/OFF REPEAT Timer setting.

TIPS FOR ENERGY SAVING

Avoid • Do not block neither the air intake nor the air outlet. It may cause less
performance, and may leads to malfunctions.
• Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If
the walls and ceiling of the room are warmed by the sun, it will take longer to
cool the room.

Do • Always try to keep the air filter clean. (Refer to “CARE AND CLEANING”.) A
clogged filter will impair the performance of the unit.
• To prevent conditioned air from escaping, keep windows, doors and any other
openings closed.

20
 ADJUSTING THE AIRFLOW DIRECTION
1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes with your
hands to the left or right.

When the humidity is high, the vertical vanes should be in the front
CAUTION position during the cooling or dehumidifying operation. If the vertical
vanes are positioned all of the way to the right or left, condensation may
begin to form around the air vent and drip down.

2. Vertical The vertical airflow can be adjusted by moving the flap with the remote controller.
Do not move the flap with your hands. Confirm that the remote controller has
been turned on. Use the FLAP button to set either the sweep function or one of
the six airflow direction settings.

SWEEP
COOL
DRY SWEEP

HEAT
A. Sweep function B. Setting the airflow manually
The flap starts moving up and down to Referring to the above illustration, use the
deliver air over the sweep range. FLAP button to set the airflow direction
within the range used during the heating,
C. Auto flap function cooling, or dehumidifying operation.
The flap is set to the recommended
position.

NOTE • The flap automatically closes when the unit is off.

• During the heating operation, the fan speed will be very low and the flap will
be in the horizontal position (position ) until the air being blown out of the
unit begins to warm. Once the air warms up, the flap position and fan speed
change to the settings specified with the remote controller.

• Use the FLAP button on the remote controller to adjust the position of
CAUTION the flap. If you move the flap by hand, the flap position according to the
remote controller and the actual flap position may no longer match. If
this should happen, shut off the unit, wait for the flap to close, and then
turn on the unit again; the flap position will now be normal again.
• Do not have the flap pointed down during cooling operation.
Condensation may begin to form around the air vent and drip down.

21
 OPERATION WITHOUT THE REMOTE
CONTROLLER
INDOOR UNIT If you have lost the remote controller or it has trouble, follow the steps below.

When the air conditioner is not running

Each time the OPERATION button is pressed, the type of operation conducted is
indicated by the changing color of the OPERATION lamp. Press the button and
select the lamp color that suits your preference for operation.
Cooling operation Heating operation Stop
(green) (red) (lamp off)

OPERATION button

NOTE The temperature is set to the room temperature minus 4 °F during the cooling
operation and to the room temperature plus 4 °F during the heating operation,
and the fan speed and flap are set to Auto.

CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect
the power before cleaning.
2. Do not pour water on the indoor unit to clean it. This will damage the
internal components and cause an electric shock hazard.

Casing and Grille (Indoor Unit) Clean the casing and grille of the indoor unit with a vacuum cleaner brush, or
wipe them with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid
detergent. When cleaning the grille, be careful not to force the vanes out of place.

1. Never use solvents, or harsh chemicals when cleaning the indoor unit.
CAUTION Do not wipe the plastic casing using very hot water.
2. Some metal edges and the fins are sharp and may cause injury if
handled improperly; be especially careful when you clean these parts.
3. The internal coil and other components of the outdoor unit must be
cleaned every year. Consult your dealer or service center.

22
 CARE AND CLEANING (CONTINUED)
Filter The filter behind the air intake grille should be checked and cleaned at least once
every two weeks.

How to remove the filter 1. Grasp both ends of the air Air intake grille
intake grille, and remove it by
opening towards the front and
pulling towards you.

2. Remove the filter attached to

the rear of the air intake grille. Filter

Cleaning Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter,
wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it.

How to replace the filter 1. With the FRONT mark of the

filter at the front, align the two Filter
indentions near the mark with
the hooks at the rear of the air
intake grille, and then mount
the filter.

FRONT mark
Hook
2. Allow the edge of the air intake
grille to slide into the top of the Groove
indoor unit, and then insert it
all the way inside. Pin
Air intake grille

3. To attach the air intake grille to Air intake grille

the indoor unit, press its
bottom right and left corners as
well as its bottom center into
place.

NOTE Attach so that the round pins at the top right and left corners of the air intake grille
are inserted into the grooves at the top right and left of the indoor unit.

23
 CARE AND CLEANING (CONTINUED)
Cleaning the main unit • Wipe clean using a soft, dry cloth.
and remote controller • To remove stubborn dirt, moisten a cloth in warm water no hotter than 104 °F, wring
thoroughly, and then wipe.
• The air intake grille can be removed in order to wash it with water.
Removing and Refer to “How to remove the filter” and “How to replace the filter” on page 23.
remounting the air
intake grille
When using a footstool or the like, be careful not to let it tip over.
CAUTION

Washing the grille • Clean the grille gently using a soft sponge, or the like. Then wipe away any remaining
with water moisture.
• Neutral detergent may be used to remove stubborn dirt. Then rinse thoroughly with
water and wipe away any remaining moisture.

WIRED REMOTE CONTROLLER

A separately sold wired remote controller (CZ-RD515U) used with this air conditioner is
also available. If you wish to use the wired remote control function, you will need to
purchase both the optional wired remote controller and its connection kit (CZ-RC515U).

24
 TROUBLESHOOTING (BEFORE CALLING FOR
SERVICE)
If your air conditioner does not work properly, first check the following points before requesting service. If it still does not
work properly, contact your dealer or service center.
Trouble Possible Cause Remedy

Air conditioner does not run at all. 1. Power failure. 1. Restore power.

2. Leakage circuit breaker tripped. 2. Contact service center.

3. Line voltage is too low. 3. Consult your electrician or dealer.

4. Batteries in remote controller have 4. Replace batteries.

run down.

OPERATION lamp blinks and air Trouble in system. Contact service center.
conditioner does not operate.

Compressor runs but soon stops. Obstruction in front of condenser coil. Remove obstruction.
(Outdoor Unit)

Poor cooling (or heating) performance. 1. Dirty or clogged air filter. 1. Clean air filter to improve airflow.

2. Heat source or many people in 2. Eliminate heat source if possible.

room.

3. Doors and/or windows are open. 3. Shut them to keep the heat (or cold)
out.

4. Obstacle near air intake or air 4. Remove it to ensure good airflow.

discharge port.

5. Thermostat is set too high for 5. Set the temperature lower (or
cooling (or too low for heating). higher).

6. (Outdoor temperature is too low for 6. (Consult your dealer or try to use
heating.) another heat appliance.)

Clicking sound is heard from the air In heating or cooling operation, any This is normal, and the sound will soon
conditioner. plastic parts may expand or shrink due disappear.
to a sudden temperature change. In
this event, a clicking sound may occur.

OPERATION lamp lights but outdoor The use of cellular phones near the air 1. Turn off the power then restart the
unit will not run. conditioner may cause disturbance to air conditioner after a while.
its normal operation.
2. Consult your dealer.

OPERATING RANGE
The air conditioner is operable within the temperature ranges as listed below:

Temperature Indoor air temperature Outdoor air temperature

COOLING Max. 95 °F DB / 71 °F WB 115 °F DB

Min. 67 °F DB / 57 °F WB 14 °F DB

HEATING Max. 80 °F DB / 67 °F WB 75 °F DB / 65 °F WB

Min. – DB / – WB – DB / 0 °F WB

25
 SPECIFICATIONS
Indoor Unit
Model No.
CS-MKE18NKU CS-MKE24NKU
Power Source Single-phase, 208-230 V, 60 Hz
kW 5.15 7.10
Cooling Capacity
BTU/h 17,500 24,200
kW 6.00 8.50
Heating Capacity
BTU/h 20,400 29,000
Cooling Operation
dB(A) 41/38/34 44/41/38
Operation (H/M/L)
Sound Heating Operation
dB(A) 40/37/34 43/40/37
(H/M/L)
Unit Dimensions (H×W×D) inch 11-23/32×41-15/16×8-5/8 11-23/32×41-15/16×8-5/8
(Indoor unit : Include panel) (mm) (298×1,065×219) (298×1,065×219)
Net Weight lbs. (kg) 26.5 (12.0) 26.5 (12.0)

Outdoor Unit
Model No.
CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU
Power Source Single-phase, 208-230 V, 60 Hz
kW 5.45 [2.90 ~ 5.45] 6.80 [2.90 ~ 6.80] 9.00 [2.90 ~ 9.00]
Cooling Capacity
BTU/h 18,600 [9,800 ~ 18,600] 23,200 [9,800 ~ 23,200] 30,600 [9,800 ~ 30,600]
kW 7.30 [3.40 ~ 7.30] 8.60 [3.40 ~ 8.60] 9.40 [3.40 ~ 9.40]
Heating Capacity
BTU/h 24,800 [11,600 ~ 24,800] 29,200 [11,600 ~ 29,200] 32,000 [11,600 ~ 32,000]
Cooling Operation
dB(A) 50 50 53
Operation (Hi)
Sound Heating Operation
dB(A) 52 52 52
(Hi)
inch 29-1/8×35-7/16×12-19/32 29-1/8×35-7/16×12-19/32 35-1/32×35-7/16×12-19/32
Unit Dimensions (H×W×D)
(mm) (740×900×320) (740×900×320) (890×900×320)
Net Weight lbs. (kg) 143.3 (65.0) 143.3 (65.0) 180.8 (82.0)

26