Fujitsu ART90EL, ART90EL3, ART90TL, ART90TL3, AOT90EP Operating Manual

KEEP THIS OPERATION MANUAL
FOR FUTURE REFERENCE

FUJITSU GENERAL LIMITED

P/N9365350010

Indoor Unit

ART90EL(3)
ART90TL(3)

Outdoor Unit

AOT90EP(3)
AOT90TP(3)

OPERATING MANUAL

AIR CONDITIONER

DUCT TYPE

1

CONTENTS

● Do not attempt to install this air conditioner by yourself.

● This unit contains no user-serviceable parts. Always consult authorized service per-

sonnel for repairs.

● When moving, consult authorized service personnel for disconnection and installa­tion of the unit.

● Do not become over-exposed to cold air by staying in the direct path of the air flow of
the air conditioner for extended periods of time.

● Do not insert fingers or objects into the outlet port or intake grilles.

● Do not start and stop air conditioner operation by turning off the electrical breaker

and so on.

● In the event of a malfunction (burning smell, etc.), immediately stop operation, turn
off the electrical breaker, and consult authorized service personnel.

● Provide occasional ventilation during use.

● Do not direct air flow at fireplaces or heating apparatus.

● Do not climb on, or place objects on, the air conditioner.

● Do not expose the air conditioner directly to water.

● Do not operate the air conditioner with wet hands.

● Turn off power source when not using the unit for extended periods.

● Always turn off the electrical breaker whenever cleaning the air conditioner or chang-

ing the air filter.

● Connection valves become hot during Heating; handle with care.

● Check the condition of the installation stand for damage.

● Do not place animals or plants in the direct path of the air flow.

● When restarting after a long period of disuse in the winter, do:

Turn the power switch on at least 12 hours before starting the unit.

● Do not drink the water drained from the air conditioner.

● Do not use in applications involving the storage of foods, plants or animals, precision

equipment, or art works.

● Do not apply any heavy pressure to radiator fins.

● Operate only with air filters installed.

● Do not block or cover the intake grille and outlet port.

● Ensure that any electronic equipment is at least one metre away from either the in-

door or outdoor units.

● Avoid installing the air conditioner near a fireplace or other heating apparatus.

● Whe

n installing the indoor and outdoor unit, take precautions to prevent access to infan

ts.

● Do not use inflammable gases near the air conditioner.

CAUTION!

DANGER!

SAFETY PRECAUTIONS

● Before using the appliance, read these “PRECAUTIONS” thoroughly and operate in the correct way.

● The instructions in this section all relate to safety; be sure to maintain save operating conditions.

● “DANGER”, “WARNING” and “CAUTION” have the following meanings in these instructions:

WARNING!

CAUTION!

This mark indicates procedures which, if improperly performed, are most likely to
result in the death of or serious injury to the user or service personnel.

This mark indicates procedures which, if improperly performed, might lead to the
death or serious injury of the user.

This mark indicates procedures which, if improperly performed, might possibly result
in personal harm to the user, or damage to property.

DANGER!

SAFETY PRECAUTIONS ....................................... 1

NAME OF PARTS ................................................... 2

PREPARATION ....................................................... 3

OPERATION ........................................................... 3

TIMER OPERATION (OFF TIMER/ON TIMER) ...... 4

TIMER OPERATION (WEEKLY TIMER) ................. 5

ENERGY SAVE OPERATION ............................... 10

SYSTEM OPERATION ......................................... 11

CARE AND MAINTENANCE ............................... 11

OPERATION DETAILS .......................................... 12

ERRORS AND SELF DIAGNOSIS ....................... 13

TROUBLESHOOTING .......................................... 13

2

°C

NON STOP

CLOCK

TEMP

AUTO

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

°C

NON STOP

CLOCK

TIMER

NEXT DAY

DAY

TEMP.

OFFON
TIMER
WEEKLY

AUTO

OFF

ON

OFF

ON

DAY OFF

21

HIGH
MED
LOW

AUTO

HEAT
FAN
COOL

DEFROST TEST

*

DAB 80

C 9 7

G

F

J

E

H I

Q

R

L

K

MNOP

5

6

6

5

NAME OF PARTS

Fig. 1

Fig. 2

Fig. 3

● For explanatory purposes, the figure showing the remote

controller display shows all possible displays. The actual
display shows only that area that is being adjusted or used.

Fig. 4 Display

Fig. 1 Indoor Unit

1 Outlet Port

2 Intake Port

3 Drain Pipe (Main)

4 Drain Pipe (Safety)

Fig. 2 Outdoor Unit

5 Air intake

6 Air outlet

Fig. 3 Remote Controller

7 START/STOP Button

8 Operation Lamp

9 ENERGY SAVE Button

0 DAY OFF Button

A ENERGY SAVE Lamp

B ZONE Control Button

C SET Button

D ZONE Control Lamp

E CLOCK ADJUST Button

F TIMER MODE Button

G SET TIME Button

H SET TEMP./DAY Button

#I FAN CONTROL Button

J MASTER CONTROL Button

K Remote Controller Display

(Fig. 4)

L Timer Mode Display

M Clock Display (CLOCK/TIMER)

N Set Temperature Display

(TEMP.)

#O Fan Speed Display

P Operation Mode Display

Q DEFROST Display

R TEST Display

Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).

● Install this with the power sup-

ply chain during on-site instal­lation.

#NOTE:
This model does not have a fan speed
function. (I, O)

Electrical Breaker

2

1

3

4

3

°C

NON STOP

CLOCK

TEMP

AUTO

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

°C

NON STOP

CLOCK

TEMP

AUTO

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

1

2

CLOCK

21

Set the Current Time and Day

1

Press the CLOCK ADJUST button for more than three
seconds.

2

Press the SET TEMP./DAY button and set the day.

▲: Use to advance the day forward.
▼: Use to turn the day back.

The day is indicated by a code number from 1 to 7, as shown in the table
below. Set to the number that corresponds to the current day.

DAY CODE 1 2 34567

DAY OF THE WEEK MON TUE WED THU FRI SAT SUN

3

Press the SET TIME button and set the time.

▲: Use to advance the time forward.
▼: Use to turn the time back.

(Press once to move the time 1 minute; hold down and the time will move
10 minutes at a time.)

4

Press the CLOCK ADJUST button again.

This registers the new day and time values. The day display goes off, and
the time display stops flashing.

PREPARATION

CLOCK

DAY

AUTO

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

AUTO

DEFROST TEST

DAY OFF

ENERGY SAVE

3

2

1

Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).

To Select Mode Operation

1

Press the START/STOP button.

The unit will start and the remote controller’s operation lamp (green) will
light up.

2

Press the MASTER CONTROL button to select the de­sired mode.

*HEAT FAN COOL

To Set the Thermostat

Press the SET TEMP./DAY button to the desired temperature.

▲ : Press to raise the thermostat setting.
▼ : Press to lower the thermostat setting.

●Thermostat setting range:

* Heating ............................... 16 °C to 30 °C

Cooling ............................... 18 °C to 30 °C

The thermostat cannot be used to set room temperature during the FAN mode
(the temperature will not appear on the remote controller’s display).

The thermostat setting should be considered a standard value, and may
differ somewhat from the actual room temperature.

To Stop Operation

Press the START/STOP button.

The remote controller’s operation lamp (green) will go out.
The display contents disappear and only the current time is displayed.

OPERATION

Example: Set the time to 9:31.

ccc

Example: When set to COOL

Example: When set to 26 °C

4

°C

CLOCK

TIMER

TEMP

OFF
TIMER

AUTO

OFF

TIMER

MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

°C

CLOCK

TIMER

TEMP

OFF
TIMER

AUTO

OFF

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

1

2

TIMER OPERATION (OFF TIMER/ON TIMER)

Before using the timer function, be sure that the remote controller is set to the correct current time and Day.
Press the START/STOP button; after the unit starts operation perform the following procedure:

cc

c

OFF Timer / ON Timer

1

Press the TIMER MODE button and display either OFF
Timer or ON Timer.

The timer will start operating. (If you set the ON timer, the air conditioner
will stop operating.)

Each time the button is pressed the timer function changes in the follow­ing order:

NON STOP (RESET) OFF ON WEEKLY

2

Press the SET TIME button and set the timer time.

▲ : Use to advance the time forward.
▼ : Use to turn the time back.

(Press once to move the time 1 minute; hold down and the time will move
10 minutes at a time.)

Example: Setting the OFF TIMER

to 23:35

c

To confirm or Change Settings
Before Starting Operation

● To confirm settings

Press the TIMER MODE button once.
(The timer setting information will be
displayed for 15 seconds after the
TIMER MODE button is pressed.)

● To change settings

Confirm the settings as noted above,
then press the SET TIME button and
TIMER MODE button as necessary to
change the desired timer setting.
(The timer settings will be displayed
for 15 seconds after the button is
pressed.)

● After confirming or changing the set­tings, press the START/STOP button
to start operation.

To Change the Timer Setting
During Operation

Operate as noted in step 2.

To Change the Timer Mode
During Operation

Press the TIMER MODE button and set
the unit to the desired mode.

To Cancel the Timer Mode
During Timer Operation

Press the TIMER MODE button and set
the display to “NON STOP” (the unit will
switch to non-stop operation).

To Stop Operation During
Use of Timer Mode

Press the START/STOP button.

5

TIMER OPERATION (WEEKLY TIMER)

Use the weekly timer to set operating times for each day of the week.

Weekly Timer Features

● Set different operating times for each day of the week.

● Set one or two operating spans (one or two ON times and one or two OFF times) per day.

● Set time to a resolution of 5 minutes.

● OFF time can be carried over to the subsequent day.

● Use the “DAY OFF” setting to cancel operation for any day of the coming week (one-time cancellation).

TIMER

DAY

WEEKLY

AUTO

ON

OFF

TIMER

MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

1

2

3

TIMER

DAY

WEEKLY

AUTO

ON

OFF

TIMER

MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

AUTO

DEFROST TEST

DAY OFF

ENERGY SAVE

4

5

Setting Up the Weekly Timer Operation

Press the START/STOP button to stop the air conditioner, and then proceed as fol­lows.

1

Press the TIMER MODE button so that “WEEKLY” ap­pears on the display.

The display now shows the current day (by DAY CODE), the first ON and
OFF times for the day (the “WEEKLY 1” times), the fan speed, and the
operating mode.
The top time value gives the ON time, and the bottom value gives the
OFF time.
If either time is not set, the corresponding time display is blank “

”.

2

Press the SET TEMP./DAY button to select the day that
you want to set up.

▲ : Use to advance the day forward.
▼ : Use to turn the day back.

DAY CODE 1 2 3 4 5 6 7

DAY OF THE WEEK MON TUE WED THU FRI SAT SUN

3

Hold the SET button down for 3 seconds.

The “WEEKLY 1” ON time starts flashing, and the fan speed and operat­ing mode displays go off.

4

Press the SET TIME button to set the day’s first ON
time.

▲ : Use to advance the time forward.
▼ : Use to turn the time back.

(Press once to move the time 5 minute; hold down and the time will move
10 minutes at a time.)

5

Press the SET button.

This registers the first ON time setting for the selected day.
The ON time display stops flashing, and the “WEEKLY 1” OFF time starts
flashing.

6

TIMER

DAY

WEEKLY

AUTO

ON

OFF

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

AUTO

DEFROST TEST

DAY OFF

ENERGY SAVE

6

7

CLOCK

AUTO

TIMER

SET TIME TEMP./DAY FAN

21

AUTO

DEFROST TEST

NOTES:

(1) If no time values are flashing, the clock display will automatically reappear after 15 seconds if no buttons are pressed.

(2) A flashing time value indicates that the system is in time-setting mode. To return to the clock display you must hold

down the SET button for 3 seconds.

(3) You do not need to set values for both WEEKLY 1 and WEEKLY 2. If you wish, you can set values only for WEEKLY 1

or only for WEEKLY 2.

(4) The allowable range for the day’s time settings is shown below.

(5) If you set the OFF time to occur on the day following the ON time, the NEXT DAY caption appears on the display.

6

Press the SET TIME button to set the day’s first OFF
time.

The earliest OFF time you can set is 5 minutes after the ON time. The
latest OFF time is 23:55 on the subsequent day.

7

Press the SET button.

This registers the first OFF time for the day, completing the “WEEKLY 1”
settings for that day.
The display switches to “WEEKLY 2”, and the day’s second ON time be-
gins flashing.

8

Repeat the operations described in Steps 4 to 7 to set
the second ON and OFF times for the day (the “WEEKLY
2” times).

When you press the SET button after setting the “WEEKLY 2” OFF time,
the system registers the “WEEKLY 2” settings for the day and returns you
to the “WEEKLY 1” ON time setup process. (The first ON setting reap­pears and begins flashing.)

You can review your settings by pressing the SET button. Each press
moves you to the next setting, as follows.

WEEKLY 1 WEEKLY 1 WEEKLY 2 WEEKLY 2

ON OFF ON OFF

9

Press the SET TEMP./DAY button to select another day
for setup. The repeat steps 4 to 8 above to set the ON
and OFF times for that day.

10

When you have finished setting all of the times, hold
down the SET button for 3 seconds.

The WEEKLY display flashes for 3 seconds while the new WEEKLY TIMER
settings are registered, and then the clock display reappears.

ccc

c

Next day’s WEEKLY

settings

Cannot set

5 min.

Available range Cannot set

5 min.

ON OFF ON OFF

Previous day’s WEEKLY

settings

0:00 0:00

TIMER

NEXT DAY

DAY

WEEKLY

AUTO

ON

OFF

21

AUTO

DEFROST TEST

If the timer is not set, press the SET but­ton with the time display blank “ ”,
and perform next operation.

7

°C

CLOCK

TIMER

TEMP

WEEKLY

AUTO

OFF

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

1

2

Starting Weekly Timer Operation

1

Press the TIMER MODE button so that “WEEKLY” ap­pears on the display.

2

Press the START/STOP button to start operation.

(This step is not necessary if the air conditioner is already running.)

Weekly timer operation starts, and the operation lamp comes on.
(If the current time is between the first or second ON and OFF time set­tings for the current day, the air conditioner will start. Otherwise the air
conditioner will remain off.)

The day display is replaced by the temperature display.
The upper time display now shows the current time, and the lower time
display shows the next scheduled ON or OFF time.

To Stop Weekly Timer Operation

● To stop weekly timer while leaving the air conditioner run­ning:
Press the TIMER MODE button to select NONSTOP, OFF
TIMER, or ON TIMER.

● To stop weekly timer operation and the air conditioner also:
Press the START/STOP button.

Reviewing the Time Settings

Press the START/STOP button to stop the air conditioner, and
then proceed as follows.

1 Press the TIMER MODE button so that “WEEKLY” appears

on the display.

2 Press the SET TEMP./DAY button to select the day that you

want check.

3 Press the SET TIME button (▲ or ▼) to switch between the

“WEEKLY 1” or “WEEKLY 2” time displays.

Cancelling Selected Time Settings

Press the START/STOP button to stop the air conditioner, and then proceed as fol­lows.

1

Carry out steps 1 to 3 of the “Setting Up the Weekly
Timer Operation” procedure to select the day you want
to edit.

2

Press the SET button to select the ON time that you
want to cancel.

Be sure to select an ON time (the upper time display).

3

Hold down the ▼ side of the SET TIME button until the
time display becomes blank “ ”.

4

Press the SET button.

The first OFF time setting (“WEEKLY 1” OFF time) is deleted and replaced
by a flashing blank pattern “

”.

5

Press the SET button again.

This completes deletion of the “WEEKLY 1” ON/OFF settings.
The second ON time setting (“WEEKLY 2” ON time) appears and flashes.
If you wish to delete other time settings, repeat steps 2 through 5.

6

Once the setting has been canceled, hold down the
SET button for 3 seconds.

The WEEKLY display flashes briefly, and then the clock display appears.

Example: Clearing the “WEEKLY 1” ON/

OFF times for day 4 (Thursday)

TIMER

DAY

WEEKLY

AUTO

ON

OFF

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

AUTO

DEFROST TEST

DAY OFF

ENERGY SAVE

2

3

TIMER

DAY

WEEKLY

AUTO

ON

OFF

21

AUTO

DEFROST TEST

TIMER

DAY

WEEKLY

AUTO

ON

OFF

21

AUTO

DEFROST TEST

TIMER OPERATION (WEEKLY TIMER)

8

To Change Selected Time Settings

Press the START/STOP button to stop the air conditioner, and then proceed as fol­lows.

1

Carry out steps 1 to 3 of the “Setting Up the Weekly
Timer Operation” procedure to select the day you want
to edit.

2

Press the SET button to select the time that you want
to change.

The selected setting flashes on the display. Each press moves you to the
next setting for the selected day, as follows.

WEEKLY 1 WEEKLY 1 WEEKLY 2 WEEKLY 2

ON OFF ON OFF

3

Press the SET TIME button to change the time setting.

4

Press the SET button.

The new setting overwrites the previous setting.

5

Once the setting has been canceled, hold down the SET
button for 3 seconds.

The WEEKLY display flashes briefly, and then the clock display appears.

ccc

c

Example: Changing the “WEEKLY 2”

ON setting for day 5 (Friday)
from 14:00 to 15:30

TIMER

DAY

WEEKLY

AUTO

ON

OFF

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

AUTO

DEFROST TEST

DAY OFF

ENERGY SAVE

2

TIMER

DAY

WEEKLY

AUTO

ON

OFF

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

AUTO

DEFROST TEST

DAY OFF

ENERGY SAVE

4

3

NOTES:

In the following cases, cancel the set time prior to making the required amendments.

(1) If you want to change the ON time to a time that is later than the currently set OFF time.

(2) If the change would cause a temporary overlap between the first and second ON/OFF time spans.

Temporary overlap

ON OFF

ON

OFF

WEEKLY 1

WEEKLY 1

Change

Change

ON OFF

WEEKLY 1

ON OFF

WEEKLY 2

ON

OFF

WEEKLY 1 WEEKLY 2

Time

Time

Time

Time

ON OFF

9

About the DAY OFF

● Use the DAY OFF setting to switch off timed operation for a selected day in the coming week.

● This is a temporary, one-time setting. The DAY OFF setting is automatically cleared as soon as the specified day passes.

Next day

Example: To switch off timed operation

for day 2 (Tuesday)

NOTES:

(1) The DAY OFF setting is only available for days for which weekly time settings already exist.

(2) You can make this setting for any of the next seven days (counting from the current day).

(3) The DAY OFF setting is effective over the range illustrated below. The Weekly setting for which an ON time has been

set is eligible for the day in which the DAY OFF has been set.

(4) The display on the clock’s lower line will usually be “ ” for the DAY OFF set day during Weekly operations.

CLOCK

TIMER

DAY

WEEKLY

AUTO

ON

OFF

DAY OFF

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

2

ON OFF

0:00 0:00

Effective range of DAY OFF setting

WEEKLY setting for preceding

day

WEEKLY setting

Preceding day DAY OFF day

°C

CLOCK

TIMER

TEMP

WEEKLY

AUTO

DAY OFF

21

HIGH

AUTO

COOL

DEFROST TEST

Using the DAY OFF Setting

Press the START/STOP button to stop the air conditioner, and then proceed as fol­lows.

1

Carry out steps 1 to 2 of the “Setting Up the Weekly
Timer Operation” procedure to select the day that you
want to set as the DAY OFF.

2

Press the DAY OFF button.

The DAY OFF setting is registered, and the DAY OFF caption appears on
the display.

● To cancel the DAY OFF setting:
You can cancel the setting by pressing the DAY OFF button again.

ON OFF

Precautions during setup

Setup is not possible in the following cases, so amend the time.

● If you set an ON time while leaving the OFF time setting blank:
Nothing will happen when you press the SET button.
To proceed, press the SET TIME button and enter an appropriate setting.

● When an attempt is made to set only the OFF time.
Nothing will happen when you press the SET TIME button.
Press the SET button and amend the entry for the ON time.

● ON and OFF times cannot be set to the same value.

● The OFF time cannot be set earlier than the ON time.

● The WEEKLY 2 settings cannot be set earlier than the WEEKLY 1 settings.

● The WEEKLY 1 and WEEKLY 2 time spans cannot overlap.

TIMER OPERATION (WEEKLY TIMER)

10

°C

NON STOP

CLOCK

TEMP

AUTO

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

ENERGY SAVE OPERATION

To Use the ENERGY SAVE

Press the ENERGY SAVE button.

The unit will run in the ENERGY SAVE mode.

The ENERGY SAVE lamp (green) will light.

To Stop the ENERGY SAVE

Press the ENERGY SAVE button one more time.

The ENERGY SAVE mode will be turned off.

The ENERGY SAVE lamp goes off, and the unit will return to the former operat­ing conditions.

About the ENERGY SAVE

● The energy conservation mode (ENERGY SAVE) raises the set temperature slightly in the cooling mode and lowers the set
temperature in the heating mode, using a computer program to economically control the operation of the unit.

● If you press the ENERGY SAVE button while the air conditioner is on, it will change to the conservation mode. If you press
the ENERGY SAVE button while the unit is in the timer mode (ON timer, WEEKLY timer), the unit will go into the conserva­tion mode when the unit starts with the timer.

● If you turn off the air conditioner while in the conservation mode, the mode will be shut off.

● The temperature set on the remote controller will not change if the energy save mode is used.

■ * When Heating

After the ENERGY SAVE button is pressed, the set tempera­ture will be lowered about 1 °C every 30 minutes. When it
has lowered a total of 2 °C, then it will hold that tempera­ture.

■ When Cooling

After the ENERGY SAVE button is pressed, the set tempera­ture will be raised about 0.5 °C every 30 minutes. When it
has gone up a total of 1 °C, then it will hold that tempera­ture.

30 min.

0.5 °C

1 °C

▼ Set to the ENERGY SAVE mode.

1 °C

2 °C

30 min.

▲ Set to the ENERGY SAVE mode.

Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).

11

°C

NON STOP

CLOCK

TEMP

AUTO

TIMER
MODE

SET

ZONE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

HIGH

AUTO

COOL

DEFROST TEST

DAY OFF

ENERGY SAVE

SYSTEM OPERATION

<Control Several Units with just one Remote Controller>

One remote controller can control up to 16 air conditioners.
All the air conditioners can be operated with the same set­ting.

To Use the ZONE CONTROL

When the ZONE control button is pressed while multiple air conditioners
are being centralized controlled, only the preset air conditioners stop.

Press the ZONE control button.

Preset units will stop.

The ZONE lamp (green) will light.

To Stop the ZONE CONTROL

Press the ZONE control button one more time.

Those units that were stopped will start again.

The ZONE lamp will go out.

Unit No.1

Unit No.2 Unit No.16

Remote
controller

Outdoor

unit

Indoor unit

● Before cleaning the unit, be sure to stop the unit and disconnect the power supply.

● Turn off the electrical breaker.

● A fan operates at high speed inside the unit, and personal injury could result.

CARE AND MAINTENANCE

CAUTION!

Installing the Air Filter

Be sure the filter is always installed in the inlet air grille of the indoor unit.

Filters can be purchased through your local dealer.

Cleaning the Air Filter

If dirt is allowed to collect in the air filter, the airflow will be reduced, leading to reduced performance, and increased
operation noise. Be sure to clean the filters regularly.

How to Cleaning

Use a vacuum cleaner to remove dust and dirt from the air filter, or wash in a synthetic detergent. After washing, dry in a
shaded place, then reinstall.

● When used for extended periods, the unit may accumulate dirt inside, reducing its performance. We recommend that the
unit be inspected regularly, in addition to your own cleaning and care. For more information, consult authorized service
personnel.

● When cleaning the unit’s body, do not use water hotter than 40 °C, harsh abrasive cleansers, or volatile agents like
benzene or thinner.

● Do not expose the unit body to liquid insecticides or hairsprays.

● If the unit will not be operated for a period of one month or more, be sure to allow the inner parts of the unit to dry

thoroughly, in advance, by operating the unit in fan mode for half a day.

12

OPERATION DETAILS

Temperature and Humidity Range

Permissible range of temprature and humidity are as follows:

Operation and Performance

* Heating Performance

● This air conditioner uses a heat pump which absorbs heat
from outside air and brings it indoors. As a result, its heat­ing performance is reduced as the temperature of out­side air drops. If you find that insufficient room heat is
produced, we recommend that you use the air conditioner
together with other heating appliances.

● Heat-pump type air conditioners use warm-air
recirculation to warm your entire room. As a result, some
time will be required after starting operation until your
entire room becomes warm.

*

Microcomputer-controlled Automatic Defrosting

When the outside temperature is low and the humidity high,
frost will collect on the outside unit, reducing heater effi­ciency. When this happens, the computer will automatically
start the defrost cycle. During the defrost cycle, the indoor
fan will shutdown and DEFROST will be displayed on the
remote controller. It will take anywhere from 4 to 15 min­utes before the air conditioner starts up again.

*

When Indoor and Outdoor Temperatures are High

When both indoor and outdoor temperatures are high dur­ing use of the heating mode, the outdoor unit’s fan may stop
at times.

Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).

Please read and understand the following details regarding this air conditioner.

Low Ambient Cooling

When the outdoor temperature drops, the outdoor unit’s fans
may switch to Low Speed, or one of the fans may stop inter­mittently.

● Should the power supply to the air conditioner be inter­rupted by a power failure, the air conditioner will restart
automatically in the previously selected mode once the
power is restored.

AUTO Restart

In Event of Power Interruption

● Use of other electrical appliances (electric shaver, etc.) or
nearby use of a wireless radio transmitter may cause the
air conditioner to malfunction. In this event, temporarily
turn off the circuit breaker turn it on again and then use
the remote controller to resume operation.

Cooling Mode

About 0 to 46 °C

About 0 to 46 °C

About 18 °C to 30 °C

About 80 % or less

If the unit is used for long pe­riods under high-humidity
conditions, condensation
may form on the surface of
the indoor unit, and drip onto
the floor or other objects un­derneath.

*Heating Mode

—

About –10 to 21 °C

About below 30 °C

—

Outdoor temperature

Indoor temperature

Indoor humidity

COOLING MODEL

HEAT & COOL MODEL

(Reverse Cycle)

● If the air conditioner is operated under higher temperature conditions than those listed, the built-in protection circuit may
operate to prevent internal circuit damage. Also, during Cooling mode, if the unit is used under conditions of lower tem­peratures than those listed above, the heat-exchanger may freeze, leading to water leakage and other damage.

● Do not use this unit for any purposes other than the Cooling, (*)Heating, Dehumidifying, and air-circulation of rooms in
ordinary dwellings.

13

AUTO

TIMER
MODE

START/STOP

CLOCK ADJUST

SET TIME TEMP./DAY FAN

CONTROL

MASTER

CONTROL

21

AUTO

DEFROST TEST

SET

ZONE

DAY OFF

ENERGY SAVE

If there is a problem with the air conditioner, it will stop run­ning and “EE: EE” will be displayed instead of the clock.

(1) If the operation lamp is on then press the START/

STOP button to turn it off.

(2) Press the SET TIME (▼) and the SET TEMP./DAY (▼)

buttons at the same time for more than three seconds
to start the self diagnosis check.
An error code will be displayed in the clock display area.

(3) Press the SET TIME (▼) and the SET TEMP./DAY (▼)

buttons again for more than three seconds to end the
self diagnosis check.

ERRORS AND SELF DIAGNOSIS

Room temperature sensor shortcircuited

Indoor heat exchanger temperature
sensor open

Indoor heat exchanger temperature
sensor shortcircuited

Outdoor heat exchanger temperature
sensor open

Outdoor heat exchanger temperature
sensor shortcircuited

Power source connection error

Float switch operated

Outdoor temperature sensor open

Outdoor temperature sensor
shortcircuited

Discharge pipe temperature sensor open

Discharge pipe temperature sensor
shortcircuited

Outdoor high pressure abnormal

Discharge pipe temperature abnormal

Model abnormal

Indoor fan abnormal

Outdoor signal abnormal

Outdoor EEPROM abnormal

Error Code

Error Code

s

t

s

t

Error contents

Communication error
(indoor unit remote controller)

Communication error
(indoor unit outdoor unit)

Room temperature sensor open

TROUBLESHOOTING

Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).

In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the elec­trical breaker, and consult authorized service personnel.
Merely turning off the unit’s power switch will not completely disconnect the unit from the power
source. Always be sure to turn off the electrical breaker to ensure that power is completely off.

Before requesting service, perform the following checks:

WARNING!

Symptom

Doesn’t operate immedi­ately:

Problem

● If the unit is stopped and then immediately started again, the com­pressor will not operate for about 3 minutes, in order to prevent
fuse blowouts.

● Whenever the electrical breaker is turned off then on again, the
protection circuit will operate for about 3 minutes, preventing unit
operation during that period.

See Page

—

NORMAL

FUNCTION

14

Noise is heard:

Smells:

Mist or steam are
emitted:

Air flow is stops:

Water is produced from
the outdoor unit:

● During operation and immediately after stopping the unit, the
sound of water flowing in the air conditioner’s piping may be
heard. Also, noise may be particularly noticeable for about 2 to 3
minutes after starting operation (sound of coolant flowing).

*● During Heating operation, a sizzling sound may be heard occa-

sional. This sound is produced by the Automatic Defrosting op­eration.

● Some smell may be emitted from the indoor unit. This smell is
the result of room smells (furniture, tobacco, etc.) which have
been taken into the air conditioner.

● During Cooling, a thin mist may be seen emitted from the indoor
unit. This results from the sudden Cooling of room air by the air
emitted from the air conditioner, resulting in condensation and
misting.

*● During Heating operation, the outdoor unit’s fan may stop, and

steam may be seen rising from the unit. This is due to Automatic
Defrosting operation.

*● When Heating operation is started, fan is temporarily stop, to al-

low internal parts to warm up.

*● During Heating operation, if the room temperature rises above

the thermostat setting, the indoor and the outdoor unit will stop.
If you wish to warm the room further, set the thermostat for a
higher setting.

*● During Heating operation, the unit will temporarily stop opera-

tion (between 2 and 16 minutes) as the Automatic Defrosting mode
operates. During Automatic Defrosting operation, DEFROST will
be shown on the remote controller display.

● The fan may stop when the unit is monitoring the room’s tem-
perature.

*● During Heating operation, water may be produced from the out-

door unit due to Automatic Defrosting operation.

—

12

—

—

12

—

12

—

12

NORMAL

FUNCTION

Symptom

Doesn’t operate at all:

Poor Cooling (or *Heating)
performance:

See Page

—

4

—

CHECK ONCE

MORE

Items to check

● Has there been a power failure?

● Has a fuse blown out, or a circuit breaker been tripped?

● Is the timer operating?

● Is the air filter dirty?

● Are the air conditioner’s intake grille or outlet port blocked?

● Did you adjust the room temperature settings (thermostat) cor-

rectly?

● Is there a window or door open?

● In the case of Cooling operation, is a window allowing bright sun-

light to enter? (Close the curtains.)

● In the case of Cooling operation, are there heating apparatus and
computers inside the room, or are there too many people in the
room?

If the problem persists after performing these checks, or if you notice burning smells, stop operation immediately, turn off the
electrical breaker, and consult with authorized service personnel.

Symptom

Problem

See Page