Hitachi RCI-1.0FSN3 User manual

TC-12001 3-15
4-WAY CASSETTE
Operation
Manual
INVERTER-DRIVEN
MULTI-SPLIT SYSTEM
HEAT PUMP
AIR CONDITIONERS
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
USING THIS HEAT-PUMP
AIR CONDITIONERS.
KEEP THIS MANUAL FOR
FUTURE REFERENCE. P5414964
Type Model
4-Way Cassette
RCI-1.0FSN3
RCI-1.5FSN3
RCI-2.0FSN3
RCI-2.5FSN3
RCI-3.0FSN3
RCI-4.0FSN3
RCI-5.0FSN3
RCI-6.0FSN3

3-16 TC-12001
4-WAY CASSETTE
P5414964-rev.1 i
IMPORTANT NOTICE
lHITACHI pursues a policy of continuing improvement in design and performance of products.
The right is therefore reserved to vary specications without notice.
lHITACHI cannot anticipate every possible circumstance that might involve a potential hazard.
lThis heat pump air conditioner is designed for standard air conditioning only. Do not use this heat pump
air conditioner for other purpose such as drying clothes, refrigerating foods or for any other cooling or
heating process.
lDo not install the unit in the following places. It may cause a re, deformation, corrosion or failure.
* Places where a re, oil, steam or powder may enter directly to the unit such as right above a kitchen, etc.
*Places where oil (including machinery oil) may be present in quantities.
*Places where a lot of sulde gas drifts such as in a hot spring.
*Places where inammable gas may generate or ow.
*Places where strong salty wind blows such as coast regions.
*Places with an atmosphere of acidity or alkalinity.
* Places where gas from festering trash, etc. may generate.
lDo not install the unit in the place where silicon gas drifts. If the silicon gas attaches to the surface of heat
exchanger, the n surface repels water. As a result, drain water splashes outside of the drain pan and
splashed water runs inside of electrical box. In the end, water leakage or electrical devices failure may
occur.
lPay attention to the following points when the unit is installed in a hospital or other facilities where an
electromagnetic wave generates from a medical equipment.
*Do not install the unit in the place where an electromagnetic wave is directly radiated to the electrical box,
remote control cable or remote control switch.
*Install the unit at least 3 meters away from an electromagnetic wave such as a radio.
lDo not install the unit in the place where the breeze directly catches animals and plants. It could adversely
affect animals and plants.
lThe installer and system specialist shall secure safety against the refrigerant leakage according to local
regulations or standards. The following standards may be applicable, if local regulations are not available.
International Organization for Standardization, ISO5149 or European Standard, EN378 or Japan Standard,
KHKS0010.
lNo part of this manual may be reproduced without written permission.
lIt is assumed that this heat pump air conditioner will be operated and serviced by English speaking people.
If this is not the case, the customer should be add safety, caution and operating signs in the native
language.
lIf you have any questions, contact your distributor or dealer of HITACHI.
lThis manual gives a common description and information for this heat pump air conditioner which you
operate as well for other models.
lThis product is designed for standard air conditioning only.
DO NOT use this product for specic purposes, such as restoring foods, animals & plants, precision
devices, art objects, etc.

TC-12001 3-17
4-WAY CASSETTE
ii P5414964-rev.1
CHECKING PRODUCT RECEIVED
lUpon receiving this product, inspect it for any shipping damage.
Claims for damage, either apparent or concealed, should be led immediately with the shipping company.
lCheck the model number, electrical characteristics (power supply, voltage and frequency) and accessories
to determine if they are correct.
The standard utilization of the unit shall be explained in these instructions.
Therefore, the utilization of the unit other than those indicated in these instructions is not recommended.
Please contact your local agent, as the occasion arises.
HITACHI’s liability shall not cover defects arising from the alteration performed by a customer without
HITACHI’s consent in a written form.
Temperature (oC)
Maximum Minimum
Cooling
Operation Indoor 32 DB/23 WB 21 DB/15 WB
Outdoor 46 DB * -5 DB *
Heating
Operation Indoor 27 DB 15 DB
Outdoor 15 WB * -20 WB *
DB: Dry Bulb, WB: Wet Bulb
* The temperature may change depending on the outdoor unit.
This manual should be considered as a permanent part of the air conditioning equipment and should
remain with the air conditioning equipment.
lDO NOT install the air panel with motion sensor (P-AP160NAE) in the following places.
It may cause misdetection, undetectable of motion or the deterioration of the motion sensor.
* Places where ambient temperature changes drastically.
* Places where excessive force or vibration is applied to the motion sensor.
* Places where static electricity or electromagnetic waves may generate.
* Places where is interference for infrared light such as glasses or mist in a detecting area.
* Places where the lens for motion sensor is exposed in high temperature and humidity for a long time.
* Places where uid and corrosive gas exist.
* Places where direct lights such as sunlight or headlight affect the motion sensor.
* Places where hot air from a heater, etc. affects directly the motion sensor.
* Places where weather affects directly the surface of the motion sensor.
* Places where the lens surface may smudge or be damaged such as a dusty environment.
Pay attention that the detecting function will be decreased if the lens for motion sensor smudges.
In this case, wipe off smudges by a cotton swab soaked alcohol (Isopropyl alcohol is recommended.)
or a soft cloth.
(When wiping off smudges on the lens for motion sensor, do not apply excessive force.
If excessive force is applied, the resin lens may be damaged so that may cause malfunctions such as
misdetection or undetectable of the motion.)
lThis heat pump air conditioner has been designed for the following temperatures. Operate the heat pump
air conditioner within this range.

3-18 TC-12001
4-WAY CASSETTE
P5414964-rev.1 iii
TABLE OF CONTENTS
1. Safety Summary .............................................................................................................................................1
2. Before Operation.............................................................................................................................................6
2.1 Efcient Use of Indoor Unit.....................................................................................................................6
2.2 Efcient Use of Cooling and Heating......................................................................................................6
3. Name of Parts and Indication of Safety Consideration...................................................................................7
3.1 Indoor Unit..............................................................................................................................................7
3.2 Remote Control Switch...........................................................................................................................8
4. Operation Method...........................................................................................................................................9
5. Motion Sensor.................................................................................................................................................9
5.1 Function..................................................................................................................................................9
5.2 Details for Motion Sensor Control ........................................................................................................10
5.3 Descriptions for Setting Items ..............................................................................................................10
5.4 Setting of Motion Sensor......................................................................................................................10
6. Other Indications...........................................................................................................................................12
6.1 In Normal Condition..............................................................................................................................12
6.1.1 Central Control............................................................................................................................12
6.1.2 Motion Sensor Control................................................................................................................12
6.1.3 Defrost........................................................................................................................................12
6.1.4 Operation Control .......................................................................................................................12
6.2 In Abnormal Condition..........................................................................................................................13
6.2.1 Abnormality.................................................................................................................................13
6.2.2 Power Failure..............................................................................................................................13
6.2.3 Electric Noise..............................................................................................................................13
7. Automatic Control .........................................................................................................................................13
8. Simultaneous Operation ...............................................................................................................................14
9. Maintenance .................................................................................................................................................14
9.1 Daily Maintenance................................................................................................................................14
9.1.1 Cleaning Air Filter .......................................................................................................................14
9.1.2 Removing, Attaching and CleaningAir Inlet Grille......................................................................16
9.2 Maintenance Beginning and Ending of Use.........................................................................................16
10. Troubleshooting ............................................................................................................................................17
10.1 This is Not Abnormal............................................................................................................................17
10.2 Before Contact .....................................................................................................................................18
10.3 Contact Distributor................................................................................................................................19
10.4 Alarm Code ..........................................................................................................................................20

TC-12001 3-19
4-WAY CASSETTE
P5414964-rev.1 1
1. Safety Summary
< Signal Words >
lSignal words are used to identify levels of hazard seriousness.
Denitions for identifying hazard levels are provided below with their respective signal words.
: DANGER indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
: WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
: CAUTION, used with the safety alert symbol, indicates a hazardous situation which,
if not avoided, could result in minor or moderate injury.
: NOTICE is used to address practices not related to personal injury.
: NOTE is useful information for operation and/or maintenance.
DANGER
WARNING
CAUTION
NOTICE
NOTE

3-20 TC-12001
4-WAY CASSETTE
2P5414964-rev.1
lDo not perform the installation work, refrigerant piping work, drain pump, drain piping and electrical wiring
connection without referring to our installation manual. If the instructions are not followed, it may result in
a water leakage, electric shock or a re.
lUse the specied non-ammable refrigerant (R410A) to the outdoor unit in the refrigerant cycle.
Do not charge material other than R410A into the unit such as hydrocarbon refrigerants (propane or etc.),
oxygen, ammable gases (acetylene or etc.) or poisonous gases when installing, maintaining and moving.
These ammables are extremely dangerous and may cause an explosion, a re, and injury.
lDo not pour water into the indoor unit. These products are equipped with electrical parts.
If poured, it will cause a serious electrical shock.
lDo not open the service cover or access panel for the indoor or outdoor unit without turning OFF the main
power supply.
lDo not touch or adjust safety devices inside the indoor unit or outdoor unit. If these devices are touched
or readjusted, it may cause a serious accident.
lRefrigerant leakage can cause difculty with breathing due to insufcient air. Turn OFF the main switch,
extinguish any naked ames and contact your service contractor, if refrigerant leakage occurs.
lMake sure that the refrigerant leakage test should be performed.
Refrigerant (Fluorocarbon) for this unit is non-ammable, non-toxic and odorless.
However if the refrigerant is leaked and is contacted with re, toxic gas will generate.
Also because the uorocarbon is heavier than air, the oor surface will be lled with it, which could cause
suffocation.
lThe installer and system specialist shall secure safety against refrigerant leakage according to local
regulations or standards.
lUse an ELB (Earth Leakage Breaker).
In the event of fault, there is danger of an electric shock or a re if it is not used.
lDo not install the outdoor unit where there is high level of oil mist, ammable gases, salty air or harmful
gases such as sulfur.
lFor installation, rmly connect the refrigerant pipe before the compressor starts operating.
For maintenance, relocation and disposal, remove the refrigerant pipe after the compressor stops.
lDo not perform a short-circuit of the protection device such as the pressure switch when operating.
It may cause a re and explosion.
lDo not alter the product and the electrical wiring. It will cause a serious accident.
DANGER

TC-12001 3-21
4-WAY CASSETTE
P5414964-rev.1 3
lThe installation work shall be performed by the specialist installer.
If it is not completed, it may cause a water leakage, an electric shock, a re or falling down the unit.
lPerform the electrical work according to Installation Manual and all the relevant regulation and standards.
If the instructions are not followed, an electrical shock and re may occur due to insufcient capacity and
inadequate performance.
lThe electrical wiring work must be performed by authorized installers.
If not performing the electrical work completely or a capacity shortage of the power circuit, it may cause an
electric shock or a re.
Additionally, if the earth wire is disconnected, it may cause an electric shock.
Contact the authorized installer and connect the earth wiring.
lIf the circuit breaker or fuse is often activated, stop the system and contact your service contractor.
lCheck that the ground wire is securely connected. If the unit is not correctly grounded, it lead electric
shock. Do not connect the ground wiring to a gas piping, water piping, lighting conductor or ground wiring
for telephone.
lUse specied cables between units and choose the cables correctly. If not, an electrical shock or re may
occur.
lEnsure that the wiring terminals are tightened securely with the specied torques. If not, generating re or
an electrical shock at the terminal connection part may occur.
lConnect a fuse of specied capacity.
lProtect the wires, electrical parts, etc. from rats or other small animals.
If not protected, rats may gnaw at unprotected parts and which may lead to a re.
lFix the cables securely. External forces on the terminals could lead to a re.
lProvide a sufciently strong foundation. If not, the unit may fall down and it may lead to injuries.
lIf the indoor unit is installed in a small room and the refrigerant gas leakage occurs, the leaked refrigerant
gas lls the room and it may cause suffocation.
Do not exceed the maximum permissible concentration of the refrigerant gas in the room.
Consult with distributor for countermeasure such a ventilation system, etc.
lBefore performing any brazing work, check to ensure that there is no ammable material around.
When using the refrigerant be sure to wear leather gloves to prevent cold injuries.
lDo not install the unit in a place where oil, vapor, organic solvent and corrosive gas (ammonia, sulfur
compound and acid) may be present in quantities.
It may cause refrigerant leakage due to corrosion, electrical shock, deteriorated performance and
breakage.
lDo not insert a nger or stick into the air outlet and the air inlet.
It could cause injury due to touch the rotating fan or electrical devices.
lDo not control the remote control switch by wet hand.
It may cause failure of the remote control switch or an electric shock.
lDo not use any sprays such as an insecticide, lacquer, hair spray or other ammable gases within
approximately one (1) meter from the system. It may generate a re.
lDo not install the indoor unit in a place where the air ow blows directly to heating appliances.
It may cause incomplete combustion of the heating appliances.
WARNING

3-22 TC-12001
4-WAY CASSETTE
4P5414964-rev.1
lWhen the indoor unit is operated with heating appliances, ventilate a room sufciently.
If not, it may cause suffocation.
lTurn OFF the main power source immediately if the protection device is frequently activated or the main
power source switch does not work.
If not, it may cause an electric shock, a re or explosion because there are possibilities of the electrical
leakage or overcurrent, etc. Contact your distributor or contractor.
lIf abnormality (burnt odor, etc.) occurs, stop the operation and turn OFF the main power source
immediately. If not, it may cause breakage of the product, an electric shock or a re.
Contact your distributor or contractor.
lDo not operate the indoor unit without the electrical box cover and the air panel. It is unusually dangerous
that the indoor fan and electrical parts are exposed. In addition, it may cause an electric shock due to
touch the electrical parts.
lWhen the air conditioner is necessary to be repaired or relocated, contact your distributor or contractor.
If the repair and the installation are not completed, it may cause an electric shock or a re.
lDo not perform the installation work, the refrigerant piping work, the drain pump, the drain piping and
electrical wiring connection without tuning OFF the main power source.
It may cause an electric shock or injury.
lPerform the maintenance work with stable footing. If not, it may cause falling or injury.
lDo not spray water or detergent to the indoor unit when performing the maintenance work.
It may cause an electric shock or a re by electrical short-circuit.
lProtect securely the electrical parts and connectors not to splash water when performing the maintenance
work. It not, It may cause an electric shock or a re by electrical short-circuit.
lThe inside piping charged refrigerant is high pressure. Perform securely the refrigerant piping work by the
authorized installer. If not, it may cause a serious accident.

TC-12001 3-23
4-WAY CASSETTE
P5414964-rev.1 5
lDo not step or put any material on the product.
lDo not put any foreign material on the unit or inside the unit.
lDo not turn OFF the main power source of the indoor unit during the season of heating and cooling.
The water can not be discharged forcedly so that overows from the drain pan.
As the result, the oor and the ceiling surface are smudged.
lHold the air lter and the air inlet grille by hand when attaching (removing).
If not, it may cause falling or injury.
lDo not blow cold air to a person for a long time or overcool.
It may cause deterioration of physical condition and health impairment.
lDo not install the indoor unit, outdoor unit, remote control switch and cable within approximately 3 meters
from strong electromagnetic wave radiators such as medical equipments.
lSupply electrical power to the system to energize the oil heater for 12 hours before startup after a long
shutdown.
lMake sure that the outdoor unit is not covered with snow or ice, before operation.
lIn some cases, the packaged air conditioner may not be operated normally under the following cases.
* In case that electrical power for the packaged air conditioner is supplied from the same power
transformer as the device*.
* In case that the power source wires for the device* and the packaged air conditioner are located close to
each other.
Device*: (Ex) Lift, container crane, rectier for electric railway, inverter power device, arc furnace,
electric furnace, large-sized induction motor and large-sized switch.
It consumes a large quantity of electrical power.
Regarding the cases mentioned above, surge voltage may be inducted in the power supply wiring for the
packaged air conditioner due to a rapid change in power consumption of the device and an activation of
switch.
Therefore, check the eld regulations and standards before performing electrical work in order to protect
the power supply for the packaged air conditioner.
lDo not install the unit in the place where the air ow directly catches to animals or plants.
It could be the cause of adverse affect to animals or plants.
lIt is recommended that the room will be ventilated every 3 to 4 hours.
lThe heating capacity of the heat pump unit is decreased according to the outdoor air temperature.
Therefore, it is recommended that auxiliary heating equipment be used in the eld when the units is
installed in a low temperature region.
NOTICE
NOTE
CAUTION

3-24 TC-12001
4-WAY CASSETTE
6P5414964-rev.1
2. Before Operation
Supply electrical power to the system for approximately 12 hours before start-up after long shutdown.
Do not start the system immediately after power supply, it may cause a compressor failure, because
the compressor is not heated well. Make sure that the outdoor unit is not covered with snow or ice.
If covered, remove it by using hot water (approximately 50oC).
If the water temperature is higher than 50oC, it will cause damage to plastic parts.
lWhen the system is started after a shutdown longer than approximately 3 months, it is recommended that
the system be checked by your service contractor.
lTurn OFF the main switch when the system is stopped for a long period of time.
If the main switch is not turned OFF, electricity is consumed, because the oil heater is always energized
during compressor stopping.
2.1 Efcient Use of Indoor Unit
lDo not leave a window or a door open.
The operating efciency will be decreased.
It may cause dew condensation of the indoor unit. (Ventilate a room sufciently too.)
lAttach a curtain or a blind to a window.
Direct sunlight is prevented and the cooling efciency will be increased.
lDo not use heating appliances during the cooling operation as possible.
The cooling efciency will be decreased. It may cause dew condensation and dropping dew.
lUse a circulator if warm air stays around ceiling.
The comfortability will be increased. Contact your distributor for the detail.
lChange the air ow angle downward if the ceiling surface smudges.
It is recommended to change the air ow angle approx. 30odownward from the levelness.
lTurn OFF the main power source if the indoor unit is not used for a long time.
If not, the standby electricity charges will have to be paid even if the indoor unit is unused.
2.2 Efcient Use of Cooling and Heating
COOLING
(1) Air Flow Direction
The appropriate air outlet angle is approx. 30o.
If the cooling is not sufcient, change the air ow
direction. The louver angle can be changed each approx.
5oper step by the remote control switch.
(Refer to the item 12 on the manual for PC-ARF.)
(2) Air Flow Volume
”MED” should be usually used. If the air ow volume
is set as “HIGH”, the air ow will be spread wider than
“MED”.
(3) Temperature
The recommended set temperature is 27 to 29oC.
If the cooling is not sufcient, set the lower temperature.
30° 30°
Air Outlet Angle (Above Center)
Louver
Angle
HEATING
(1) Air Flow Direction
The appropriate air outlet angle is approx. 55o.
If the heating is not sufcient, change the air ow
direction. The louver angle can be changed each approx.
5oper step by the remote control switch.
(Refer to the item 12 on the manual for PC-ARF.)
(2) Air Flow Volume
”MED” should be usually used. If the air ow volume
is set as “HIGH”, the air ow will be spread wider than
“MED”.
(3) Temperature
The recommended set temperature is 18 to 20oC.
If the heating is not sufcient, set the higher temperature.
55° 55°
Air Outlet Angle (Above Center)
Louver
Angle
NOTE
< About Multi-Split System >
When the number of indoor unit or the operating mode is changed, the air outlet temperature may be
changed and the indoor temperature is changed. In this case, set as follows.
lDuring Cooling: Lower slightly the temperature setting.
lDuring Heating: Raise slightly the temperature setting.

TC-12001 3-25
4-WAY CASSETTE
P5414964-rev.1 7
3. Name of Parts and Indication of Safety Consideration
The safety considerations are indicated on the indoor unit in order to be used safety.
Read and understand this manual before using the indoor unit.
Motion Sensor
(Only for Air Panel
with Motion Sensor)
Indoor Unit
Air Outlet
Louver
Air Panel
(Optional Accessory)
Air Inlet Grille
(The air lter is attached
inside.)
Remote Control Switch
(Optional,
The operating condition is
visible by the LCD indication.)
Indication Place
for Indoor Unit Model
lIt is indicated in the specication
plate attached at the drain pan.
(Check it by opening the air inlet
grille.)
lAttach the model nameplate
(attached in the product) to the
remote control switch.
3.1 Indoor Unit
NOTE
lPress lightly the switches to control the remote control switch.
WARNING Label

3-26 TC-12001
4-WAY CASSETTE
8 P5414964-rev.1
3.2 Remote Control Switch
Model: PC-ARF (Optional)
Display Part
A/C
COOL
HIGH
LOUV. ADJ
Meeting Room
MODE SPEED LOUV. TEMP
FLTR
Motion Sensor is activated
OK ?
Filter Sign Indicator
FLTR
It is indicated at the set period for
lter cleaning.
Operation Lock Indicator
It is indicated when the operation
lock function is set.
Schedule Timer Indicator
It is indicated when the schedule
timer function is set.
Directional Key Enter Key
RUN/STOP Switch
Run Indicator
It lights while the unit
is operated, and it
ashes in an abnormal
conditions.
Operation Mode
Indicator
The indications of
“HEAT” and “AUTO” are
indicated only for the
heat pump type models.
Operation Guide
Indicator
“Central Control” is
indicated while the
remote control operation
is prohibited.
Operation Part
Setting Temperature
Indicator
Help Switch
To display Help Menu.
Return Switch
To return to the previous
screen.
Menu Switch
To display Menu.
Swing Louver
Indicator
Fan Speed Indicator Room Name
Indicator
Motion Sensor
Indicator
It is indicated only for
the air panel with motion
sensor.
NOTE
lPress lightly the switches to control the remote control switch.
lThe remote control switch shall be controlled according to the installation manual of itself.

TC-12001 3-27
4-WAY CASSETTE
P5414964-rev.1 9
4. Operation Method
Refer the manual for PC-ARF.
5. Motion Sensor
This setting is available only for the air panel with
motion sensor.
5.1 Function
lThe motion sensor detects a human activity by
the change of the infrared light.
This function saves the air conditioning capacity
(adjusting the set temperature, the air ow
volume and the air ow direction) automatically
depending on a situation.
lThe operation after the motion sensor detects
as absence can be selected from “Running”,
“Stand-by” or “Stop” on the remote control switch
with the capacity saving.
lDo not use the motion sensor function when a
baby or a handicapped person stays by oneself.
The motion sensor may detect as absence and
the operation may be stopped in the case of
staying for long time with a bit motion.
lThe motion sensor detects the human activity.
However, if someone is in a room with a bit
motion, the motion sensor may detect as
absence.
lThe motion sensor may detect as human
activity if the indoor unit with the motion sensor
is installed near a moving object (ex. swing
operation of a heating appliance) which is
difference in temperature against atmosphere.
lIn the case that the indoor units are operated
by 2 remote control switches, the motion sensor
setting is available only from the main remote
control switch.
lThe indoor unit operation can be stopped by the
motion sensor control.
NOTE:
The indoor unit without the motion sensor and
the indoor unit with the motion sensor can be
mixed to install.
In this case, when the operation is stopped by
the motion sensor control, the indoor unit without
the motion sensor will also stop the operation.
lWhile the air conditioning capacity is saved or
the operation is stopped by the motion sensor
control, “Motion sensor is activated” is displayed
on LCD.
lIf the function “Prohibiting operation by remote
control switch” is used from the centralized
controller, select the command “Running” or
“Stand-by” in “If absent” at the motion sensor
control setting.
If “Stop” is selected, the motion sensor control
can not be performed correctly as follows.
* In the case that “Stop” is selected in the
motion sensor control setting and “Prohibiting
operation by remote control switch” (for all
items) is set by the centralized controller,
the operation will not be stopped even if the
motion sensor control function changes to the
stoppage condition.
* In the case that “Stop” is selected in the
motion sensor control setting and “Prohibiting
operation by remote control switch” (for part
of items) is set by the centralized controller,
the indoor unit operation can not be restarted
from the centralized controller although the
operation can be stopped under the stoppage
condition by the motion sensor control
function.

3-28 TC-12001
4-WAY CASSETTE
10 P5414964-rev.1
5.2 Details for Motion Sensor Control
The motion sensor control adjusts automatically
the following items depending on a situation.
* Setting Temperature:
The temperature is adjusted 1oC or 2oC for
saving capacity.
* Air Flow Volume:
The air ow volume is adjusted to lower one
volume or to “Slo” (except during the dry
operation).
* Air Flow Direction:
The air ow direction is adjusted to horizontal.
5.3 Descriptions for Setting Items
lMotion Sensor Setting
* ON: The operating control function by the
motion sensor is activated.
* OFF: The operating control function by the
motion sensor is not activated.
(The default setting is “ON”.)
lIf absent
“If absent” is set for the indoor unit operation
after the motion sensor detects as absence for
set time in “Check interval”. The operation can
be selected from “Running”, “Stand-by” or “Stop”
on the remote control switch.
(The default setting is “Running”.)
* Running:
The operation is continued with saving the
capacity after detected as an absence.
If the human activity is detected for a period of
time, the normal operation will be performed
again.
* Stand-by:
The operation mode is the fan operation at “Slo”
speed. If the human activity is detected for
a period of time, the normal operation will be
performed again.
* Stop:
The operation is stopped by the remote control
switch when all the indoor units with motion
sensor detect absence which are connected
with same remote control switch.
If the human activity is detected for a period of
time by the stoppage, the normal operation is
performed again.
lCheck Interval
When the motion sensor detects an absence
at selected check interval time, the function “If
absent” will be executed. The interval can be
selected from 30, 60, 90 120 or 180 minutes.
(The default setting is 30 minutes.)
(1) Press “ ” (menu).
Select “Motion Sensor Setting” from the
menu by pressing “ ” or “ ” and press “OK”.
Menu
Motion Sensor Setting
Total Heat Exchanger SET
VENTI
Louver Open/Close 02
/
03
Louver Setting 15:10(Fri)
ENT. RTN.SEL. OK
OK
OK
(2) “Motion Sensor Setting” is displayed.
The highlighted item is shifted to “Sensor”, “If
absent” and “Check interval” by pressing “ ”
or “ ”.
Motion Sensor Setting
Sensor ON
If absent Running
Check interval
30MIN
ENT. RTN.SEL. ADJ OK
OK
(3) Press “ ” or “ ” and select “Sensor”.
Motion Sensor Setting
Sensor ON
If absent Running
Check interval
30MIN
ENT. RTN.SEL. ADJ OK
OK
(4) The display is switched “ON” and “OFF” in
order by pressing “ ” or “ ” and change the
setting.
If other settings are not required, move to
procedure (9).
Motion Sensor Setting
Sensor ON
If absent Running
Check interval
30MIN
ENT. RTN.SEL. ADJ OK
OK
5.4 Setting of Motion Sensor
• To set “Sensor”, move to procedure (3).
• To set “If absent”, move to procedure (5).
• To set “Check interval”, move to procedure (7).

TC-12001 3-29
4-WAY CASSETTE
P5414964-rev.1 11
(5) Press “ ” or “ ” and select “If absent”.
Motion Sensor Setting
Sensor ON
If absent Running
Check interval
30MIN
ENT. RTN.SEL. ADJ OK
OK
(6) The display is switched “Running”,
“Stand-by” and “Stop” in order by pressing
“ ” or “ ” and change the setting.
If other settings are not required, move to
procedure (9).
Motion Sensor Setting
Sensor ON
If absent Running
Check interval
30MIN
ENT. RTN.SEL. ADJ OK
OK
(7) Press “ ” or “ ” and select “Check interval”.
Motion Sensor Setting
Sensor ON
If absent Running
Check interval
30MIN
ENT. RTN.SEL. ADJ OK
OK
(8) The display is switched “30MIN”, “60MIN”,
“90MIN”, “120MIN” and “180MIN” in order by
pressing “ ” or “ ” and change the setting.
If other settings are not required, move to
procedure (9).
Motion Sensor Setting
Sensor ON
If absent Running
Check interval
30MIN
ENT. RTN.SEL. ADJ OK
OK
(9) Press “OK” after the setting is completed.
The conrmation screen will be displayed.
Select “Yes” by pressing “ ” or “ ” and
press “OK”. The motion sensor setting will
be conrmed and the screen will return to the
normal mode (operation mode indication).
A/C LOUV.
Motion Sensor is activated
LOUV. ADJ
MODE SPEED
HEAT
MED
TEMP
Meeting Room
OK
Save changes?
Motion Sensor Setting
Yes No
SEL. ENT. RTN.
OK
OK
OK

3-30 TC-12001
4-WAY CASSETTE
12 P5414964-rev.1
6. Other Indications
6.1 In Normal Condition
A/C
Turned ON
Central Control
MODE SPEED LOUV.
HEAT
MED
TEMP
Meeting Room
6.1.1 Central Control
“Central Control” is turned ON.
In case that the prohibiting operation by remote
control switch is set from the central controller,
operation, temperature setting, fan speed and
direction setting are not available from the remote
control switch.
A/C LOUV.
Motion sensor is activated
LOUV. ADJ
MODE SPEED
HEAT
MED
TEMP
Meeting Room
Turned ON
6.1.2 Motion Sensor Control
“Motion sensor is activated” is turned ON during
the motion sensor control.
In this case, the operation is performed with
saving the capacity or stopped by the motion
sensor control.
6.1.3 Defrost
• Defrost Operation
"DFR" is turned ON during the defrosting.
The indoor fan is stopped though the indication is
not changed.
The louver is xed at the horizontal position.
However, the louver indication of LCD continues
to activate.
• Operation Stoppage during Defrosting Operation
The RUN indicator (Green) is turned OFF when
the operation is stopped during the defrosting.
However, the operation continues with “DFR”
indication, and the unit is stopped after the defrost
operation is nished.
A/C
LOUV. ADJ
DFR
Turned ON
MODE SPEED LOUV.
HEAT
MED
TEMP
Meeting Room
6.1.4 Operation Control
• Supplying Main Electrical Power
“HOT-ST” is turned ON at power-on.
In this case, the compressor is under preheating.
The operation may not be available for Max. 4
hours. Do not turn off the outdoor unit electrical
power during the high season for Cooling/Heating
operation.
• During Hot Start (Heating Operation Only)
“HOT-ST” is turned ON.
• Different Operation Mode
The operation mode set by the remote control
switch is different with the outdoor unit operation
mode.
(Except for the heat recovery system models.)
The indication of the actual operation mode
ashes.
The above display shows the case
that the cooling mode is set from the
remote control switch when the outdoor
unit operation mode is heating.
A/C
HEAT
LOUV.
LOUV. ADJ
COOL
MED
TEMPMODE SPEED
Flashing
Meeting Room
A/C
HOT-ST
LOUV. ADJ
Turned ON
MODE SPEED
HEAT
MED
TEMP
Meeting Room
A/C LOUV.
HOT-ST
LOUV. ADJ
Turned ON
MODE SPEED
HEAT
MED
TEMP
Meeting Room

TC-12001 3-31
4-WAY CASSETTE
P5414964-rev.1 13
7. Automatic Control
The system is equipped with the following
functions.
NOTE
lThree Minute Guard (Enforced Stoppage)
The compressor remains off for at least 3
minutes once it has stopped. If the system is
started within approximately 3 minutes after it
has stopped, the RUN indicator is activated.
However, the cooling operation or the heating
operation remains off and does not start until
after 3 minutes has elapsed.
lThree Minute Guard (Enforced Operation)
If all indoor units of the system are Thermo-OFF
within approximately 3 minutes after compressor
has started, compressor is operated during 3
minutes continuously.
However, if all indoor units of the system are
stopped by remote control switch, compressor is
stopped.
lOil Return Operation
If an indoor unit is stopped more than 2 hours
continuously, this function is operated during a
few minutes.
It has this function to prevent to accumulate in
the heat exchanger of stoppage indoor unit at
cooling operation.
lFrost Prevention During Cooling Operation
When the indoor unit is operated at low
discharge air temperature, the cooling operation
may be changed to fan operation for a while
to avoid frost formation on the indoor heat
exchanger.
lSelf-Cleaning Expansion Valve
It is for self cleaning the expansion valve when
the operation is stopped at cooling.
The sound which the refrigerant ows may
be heard from the indoor unit during the self-
cleaning. However it is not abnormal.
lHot Start During Heating Operation
To prevent cold air discharge in the room, the
fan speed is controlled from the slow position
and the low position and then to the set position
according to the discharge air temperature.
At this time the louver is xed horizontally.
Except for a long period of shutdown, keep the
main power switch ON. The drain discharge
mechanism is operated if the drain level is higher
than the setting.
6.2 In Abnormal Condition
6.2.1 Abnormality
• The RUN indicator (Red) is ashing.
• The indoor unit number, the alarm code, the
model code, *model name (Ex. RCI-3.0FSN3)
and the connected number of indoor units are
displayed on LCD.
(*The unit model name is only displayed for the
corresponding unit model.)
• In case that the plural indoor units are
connected to one remote control switch, the
above abnormality informations for each indoor
unit are displayed one by one.
6.2.2 Power Failure
• All the indications are OFF.
• Once the unit is stopped by the power failure,
the unit will not be started again although
the power recovers. Perform the starting
procedures again.
• In case of instantaneous power failure within
2 seconds, the unit will be started again
automatically.
6.2.3 Electric Noise
There could be a case that all the indications are
OFF and the unit is stopped. This is occurred by
the activation of the micro computer for the unit
protection from the electric noise.
Perform the starting procedures again.

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4-WAY CASSETTE
14 P5414964-rev.1
lDuring Defrosting Operation
When the outdoor unit is performing the
automatic defrosting operation, the indoor fan is
stopped and the louver is xed horizontally.
lCooling of Indoor Unit
When the heating operation is stopped, the
indoor fan operation is maintained at the slow
position for the maximum of 2 minutes to lower
temperature of the inside unit.
lAutomatic Defrosting Cycle
When the heating operation is stopped by
pressing RUN/STOP switch, frosting on the
outdoor unit is checked and the defrosting
operation may be performed for the maximum of
10 minutes.
lPrevention of Overload Operation
When the outdoor temperature is high (approx.
21Co) during heating operation, heating
operation is stopped due to activation of
the outdoor thermistor until the temperature
becomes low.
NOTE
8. Simultaneous Operation
9. Maintenance
Knob
Air Inlet Grille
9.1 Daily Maintenance
9.1.1 Cleaning Air Filter
Clean the air lter when the lter sign is turned
ON.
lWhen the air inlet grille is opened (closed) or
the air lter is attached (removed), perform
the work according to this operation manual.
If not, it may cause falling or injury.
A/C
COOL
HIGH
LOUV. ADJ
Meeting Room
MODE SPEED LOUV. TEMP
FLTR
OK ?
Filter Sign
(1) Open the air inlet grille.
While pushing both ends of knobs at the air
inlet grille toward the arrow direction, open
the air inlet grille.
lTurn OFF the power source before the
maintenance work. If not, it may cause a re
or an electric shock.
lPerform the maintenance work with stable
footing. If not, it may cause falling or injury.
lDo not operate the system without the air lter
to protect the indoor unit heat exchanger against
being clogged.
The multiple indoor units can be controlled by one
remote control switch (Single: max. 16 units, Twin:
max. 8 sets, Triple: max. 5 sets, Quad: max. 4
sets).
Contact a distributor or a contractor for detail.
lIf the system is stopped due to a power failure, it
will not automatically start again although power
is restored.
Repeat the start-up procedure from Step 1 to
start the system. In the event of a very brief
power failure (2 seconds maximum), the settings
are memorized.
Therefore, the system starts automatically after
approximately 3 minutes.
lThis air conditioner is used hot air circulation
system for the heating operation.
If the air conditioning room is large or the room
temperature is excessively low, it takes time to
warm the whole room. “HOT-ST” will be turned
OFF after heating the room.
l“HOT-ST” may by displayed during or right
after the defrosting operation. It is activated to
prevent the cold draft. It is NOT abnormal.

TC-12001 3-33
4-WAY CASSETTE
P5414964-rev.1 15
(2) Remove the air lter.
Hold the lower side of the air inlet grille
keeping it inclined. Remove the hooks of air
lter from the air inlet grille and remove the
air lter.
Upper Part of Filter
Hook
Hook
Lower Part of Filter
Air Filter
A
ir Inlet Grille
(3) Clean the air lter.
v Vacuum the dust by a cleaner, or wash the air
lter by water or neutral detergent.
vDry the air lter in the shade.
(4) Attach the air lter.
After the air lter is dried, attach correctly to
the air inlet grille.
(5) Close the air inlet grille.
(6) Reset the lter sign.
v Press “ ” (menu).
Select “Filter Sign Reset” from the menu and
press “OK”.
The conrmation screen will be displayed.
v Select “Yes” by pressing “ ” or “ ” and press
“OK”.
The indication of “FLTR” will be turned OFF
and the screen will return to the normal mode.
FLTR
OK
Reset filter sign?
Filter Sign Reset
Yes No
SEL. ENT. RTN.
Menu
Schedule Timer
Simple Timer
Function 3
Elevating Grille 01
/
03
Filter Sign Reset 15:10(Fri)
ENT. RTN.SEL. OK
NOTE
• Do not use hot water more than 50oC.
The air lter may be deformed by heat.
• Do not dry the air lter by an open re, a dryer or
a heater. The air lter may be deformed.
NOTE
Be sure to attach the air lter.
If the indoor unit is operated without the air lter, it
may cause malfunction of the indoor unit.
NOTE
If the accumulated time of lter cleaning is not got
to setting time, the indication “ ” is turned ON
and “Setting Disabled” will be displayed.

3-34 TC-12001
4-WAY CASSETTE
16 P5414964-rev.1
9.1.2 Removing, Attaching and Cleaning
Air Inlet Grille
Wipe the air panel by a soft cloth which is soaked
in lukewarm water and squeezed.
Use a soft cloth to clean the air inlet grille and the
air panel. If bengine, thinner or detergent (with
surfactant) is used to clean, the resin part may
be changed color or deformed. In addition, pay
attention that the parts around the air outlet (louver,
guide, etc.) may be damaged if an excessive force
is applied.
Knob
Air Inlet Grille
The air inlet grille can be removed and cleaned.
(1) Open the air inlet grille.
While pushing both ends of knobs at the air
inlet grille toward the arrow direction, open
the air inlet grille.
(2) Remove the air inlet grille.
vRemove the supporting string from the air
panel.
Supporting String
(3) Clean the air inlet grille.
(4) Attach the air inlet grille.
Attach the air inlet grille in the reverse
procedure for removing.
vOpen the air inlet grille until the angle of
approximately 45° from the air panel surface.
vAfter lifting the air inlet grille keeping it
inclined, draw the air inlet grille forward.
NOTE:
Although the air inlet grille can be opened until
the angle of 90° from the air panel surface, it can
not be removed from the air panel.
45o
Air Panel
Air Inlet Grille
Ceiling Lift it with inclined.
9.2 Maintenance Beginning and Ending
of Use
< Beginning of Use >
vRemove obstacles for the air inlet grilles of
indoor unit and outdoor unit and the air outlet.
vCheck that the air lter is not clogged.
< Ending of Use >
vClean the air lter, the air inlet grille and the
air panel.