NEC RSC1711 User manual

ROOM AIR CONDITIONER
OWNER'S MANUAL
MODEL NO: RSC1711, RSH1721
RSC2411, RSH2421
Thank you for purchasing the NEC room air-conditioner. All NEC products have been
carefully designed and prepared at the factory under strict quality guide lines.
We are confident that this product will give you daily comfort and satisfaction if it is handled
properly based on this owner’s manual.
Please read carefully and thoroughly these operating instructions before installing your room
air conditioner.

PRODUCT COMPONENT IDENTIFICATION ...............................................3
(1) Features ................................................................................................3
(2) Indoor Unit, Outdoor Unit ......................................................................4
(3) Name and Function-Remote Controller (Heating model).......................5
(4) Name and Function-Remote Controller (Cooling model).......................6
(5) Remote Controller Preparation .............................................................7
AIR CONDITIONER OPERATION ................................................................8
(1) Operation Mode ....................................................................................8
(2) Operation Procedure .............................................................................8
(3) Sleep Mode Auto-Control Setting ........................................................14
(4) Airflow Direction Procedure .................................................................15
(5) Setting the Present Time .....................................................................16
(6) ON/OFF Dual Timer Setting ................................................................17
(7) Operation Details ................................................................................19
FORCED OPERATION ................................................................................20
CARE AND MAINTENANCE ......................................................................21
OPERATION TIPS .......................................................................................23
CAUTION .....................................................................................................24
BEFORE CALLING FOR SERVICE ............................................................25
THIS IS NOT MALFUNCTION ....................................................................26
CONTENTS
— 2 —

PRODUCT COMPONENT IDENTIFICATION
— 3 —
CAUTION
of handling the Remote Controller
• Aim at the signal receptor on the room air
conditioner to operate.
• The remote control signal can be received at
a distance of up to about 7m.
• Be sure that there are no obstructions
between the remote controller and the signal
receptor.
• Do not drop or throw the remote controller.
Do not place the remote controller in a
location exposed to direct sunlight, or near
the heating unit, or any other heat source.
• Block a strong light over the signal receptor
with a curtain or etc. so as to prevent
abnomal operation.
(ex:electronic quick start, ELBA, inverter type
fluorescent lamp)
Wireless Remote Controller puts
all functions at your fingertips.
(1) Features
⁄ASoft Dry Operation Mode
page 10
This mode is designed to dehumidify without
overcooling.
⁄BFuzzy Operation Mode
page 13
In selecting this mode of operation, the
setting temperature, indoor fan speed, and
the desired operation mode are
automatically set by Fuzzy rule on the basis
of sensing the room temperature.
During Fuzzy Operation, the vertical louver
swings up and down automatically in
according to 1/f rhythm. Pressing the Airflow
Direction Control Button will set the louvers
as the desired position. If you want to go on
with the 1/f swing of the vertical louver, press
again the Airflow Direction Control Button.
⁄C ON/OFF Dual Timer Setting
page 17~18
You can program the room air conditioner to
turn itself on or off so as to ensure you
maximum comfort when you return from
being away.
⁄DSleep Mode Auto Control
page 14
A touch of the Sleep Mode Button
automatically programs the room air
conditioner to turn off controls the indoor fan
speed, and adjusts the setting temperature
to create a more comfortable sleep.

Force Operation Button
Use for operation when the remote controller cannot be used.
(When operation is stopped by the remote control without
removing power plug, the room air conditioner consumes
approximately 2W of electricity.)
Signal Receptor
Receives the signals from the remote controller.
(Signal receiving sound:two short beeps or one long beep.)
Operation Indication Lamps
On/Off : Lights up during the air conditioner
operation.
Sleep Mode : Lights up during Sleep Mode Auto
operation.
Timer : Lights up during timer operation.
Deice Mode : Lights up during Deice Mode operation.
(Blinks on and off during hot start)
- Heating Model only
Outdoor Unit : Lights up during the outdoor unit's
Operation operation.- Cooling Model only
(2) Indoor Unit, Outdoor Unit
— 4 —
Open the front panel
Pull the panel to
open(left and right side
of front panel) and open
the panel upward.
Outdoor Unit
Indoor unit controls
and indicators
Air Intake Vent
(front panel)
Indoor Unit
Air Outlet Vent
Horizontal Airflow
Direction Louver
Remote Controller
Storage
Power Supply Cord
Air Filters
(behind front panel)
Panel Opening
(left and right)
Air Intake Vents
Air Outlet Vent
(Side)
(Rear)
Drain Hose
Piping
Vertical Airflow Direction Louver
(The air outlet vent opens when the operation starts.)
OUT
DOOR

(3) Name and Function-Remote Controller (Heating Model)
⁄AOperation display
Displays the operation conditions.
⁄BStart/Stop Button
Operation starts when this button is pressed, and
stops when the button is pressed again.
⁄COperation Mode Selection Button
Used to select the operation mode.
• Cooling Operation Mode.
• Soft Dry Operation Mode.
• Auto Operation.
• Heating Operation.(Heat Pump Only)
⁄DON Timer Button
Used to set the time of starting operation.
⁄EOFF Timer Button
Used to set the time of stopping operation.
⁄FTime Setting Button
Used to adjust the time.
⁄GTimer Set Button
Used to set the timer when the desired time is
obtained.
⁄HTimer CANCEL Button
Used to cancel the timer operation.
⁄ISleep Mode Auto Button
Used to set Sleep Mode Auto Operation.
⁄J Air Circulation Button
Used to circulate room air without cooling.
⁄KRoom Temperature Checking Button
Used to check the room temperature.
⁄L Airflow Direction Control Button
Used to set the desired vertical airflow direction.
⁄M Reset Button
— 5 —
RESET
ON
TIME
a.m.
p.m.
OFF
TIME
a.m.
p.m.
Hr.
ON OFF
SET CANCEL
1
2
9
10
3
4
5
6
78
12 13
11
AUTO
Remote Controller
Signal transmitter
Transmits the signals to the room
air conditioner.

(4) Name and Function-Remote Controller (Cooling Model)
⁄AOperation display
Displays the operation conditions.
⁄BStart/Stop Button
Operation starts when this button is pressed, and
stops when the button is pressed again.
⁄COperation Mode Selection Button
Used to select the operation mode.
• Cooling Operation Mode.
• Soft Dry Operation Mode.
• Auto Operation.
⁄DON Timer Button
Used to set the time of starting operation.
⁄EOFF Timer Button
Used to set the time of stopping operation.
⁄FTime Setting Button
Used to adjust the time.
⁄GTimer Set Button
Used to set the timer when the desired time is
obtained.
⁄HTimer CANCEL Button
Used to cancel the timer operation.
⁄ISleep Mode Auto Button
Used to set Sleep Mode Auto Operation.
⁄J Air Circulation Button
Used to circulate room air without cooling or heating.
⁄KRoom Temperature Checking Button
Used to check the room temperature.
⁄L Airflow Direction Control Button
Used to set the desired vertical airflow direction.
⁄M Reset Button
— 6 —
RESET
ON
TIME
a.m.
p.m.
OFF
TIME
a.m.
p.m.
Hr.
ON OFF
SET CANCEL
1
2
9
10
3
4
5
6
78
12 13
11
AUTO
Remote Controller
Signal transmitter
Transmits the signals to the room
air conditioner.

(5) Remote Controller Preparation
How to store the remote controller
— 7 —
1Pull the left and the right side to open the
front panel upward.
2Store the remote control.
3Press the left and the right side to close the front panel.
1Use the screws to secure the holder to
the wall.
Confirm that the remote
control signals can reach
the signal receptor of unit.
2To attach the remote controller to the holder.
3To remove.
RESET
RESET
RESET
1Remove the battery cover from the remote
controller.
• Slide the cover according to the arrow
direction.
2Insert the two batteries.
• Be sure that the (+) and (-) directions are
correct.
• Be sure that both batteries are new.
3Re-attach the cover.
• Slide it back into position.
• Do not use rechargeable
batteries, such batteries
differ from standard dry
cells in shape, dimensions,
and performance.
• Romove the batteries from
the remote controller if the
air conditioner is not going
to be used for some long
time.
How to insert batteries
(Remove for use.)
How to mount onto a wall

(1) Operation Mode
(2) Operation Procedure
ON
TIME
a.m.
p.m.
OFF
TIME
a.m.
p.m.
Hr.
1
2
3
4
AUTO
Heat pump model
Cooling model
AIR CONDITIONER OPERATION
— 8 —
1st
2nd
3rd
4th
Start/Stop Button
Operation Mode Selection
Button
Room Temperature Setting
Button
Indoor Fan Speed Selector
Cooling Mode
Soft Dry Mode
Auto Mode
(Heat Pump Model)
(Cooling Model)
Heating Mode
Cooling Mode
Soft Dry Mode
Auto Mode

⁄ACooling Operation Mode
( LED lamp ON)
— 9 —
2Select Cooling Operation.
Press the Operation Mode Selection Button.
Each time the button is pressed, the operation mode is shifted in the arrow direction.
• Select the fan speed in four steps
-low, medium, high, AUTO.
• The display shows high fan
speed.
Operation Display
Cooling Operation Soft Dry Operation Auto Operation
Heating Operation
(Heat pump model only)
1Press the Start/Stop Button.
4Set the fan speed.
3Set the temperature
lower than the room
temperature.
• The temperature can be set
within a range of 18° C ~ 30° C by
1° C .
To raise the Temperature
To lower the Temperature
• Two short beeps will sound and the
operation lamp will light up.
Beep, Beep
●Each time the button is pressed, the fan speed mode is
altered.

⁄BSoft Dry Operation Mode
This mode dehumidifies without overcooling.
( LED lamp ON)
— 10 —
3Set the Temperature lower than the room temperature.
4During Dry Operation
• The indoor fan speed is automatically set to low, so the shift of the indoor fan speed is
impossible because of already being set to the best speed for Dry Operatrion by Micom
Control.
• The indoor fan may be stopped to prevent overcooling.
2Select Soft Dry Operation.
Press the operation Mode Selection Button.
Each time the button is pressed, the operation mode is shifted in the arrow direction.
• The temperature can be set
within a range of 18°C~30°C by
1°C.
1Press the Start/Stop Button.
Operation Display
• Two short beeps will sound and the
operation lamp will light up.
To raise the Temperature
To lower the Temperature
Beep, Beep
Cooling Operation Soft Dry Operation Auto Operation
Heating Operation
(Heat pump model only)

⁄CAir Circulation Mode
This mode is used to circulate room air without cooling or heating.
( LED lamp ON)
— 11 —
3Each time Indoor Fan Speed Selector is pressed, the fan speed mode is shifted in the
arrow direction.
1Press the Start/Stop Button.
2Press Air Circulation Button.
• Fan speed is low.
• Fan speed is medium.
• Fan speed is high.
• Auto Air: Fan speed is automaticlly changed from
medium to low speed, or viceversa,
depending on the ambient temperature.
AUTO
• Two short beeps will sound and the
operation lamp will light up.
Beep, Beep

⁄DHeating Operation Mode (Heat pump model only)
( LED lamp ON)
— 12 —
2Select Heating Operation.
Press the Operation Mode Selection Button.
Each time the button is pressed, the operation mode is shifted in the arrow direction.
3Set the temperature.
4Set the fan speed.
1Press the Start/Stop Button.
• Two short beeps will sound and
the operation lamp will light up.
To raise the Temperature
To lower the Temperature
Beep, Beep
Operation Display
Cooling Operation Soft Dry Operation
(Heat pump model only)
Heating Operation
Auto Operation
• The temperature can be set
within a range of 16°C~30°C by
1°C.
• Each time the button is pressed, the fan speed is altered.
• Select the fan speed in four steps
-low, medium, high, AUTO.
• The display shows high fan speed.

— 13 —
⁄EAuto Operation Mode
( LED lamp ON)
1Press the Start/Stop Button.
2Select Auto Operation.
Press the Operation Mode Selection Button.
Each time the button is pressed, operation mode is shifed in the arrow direction.
3Set the temperature.
4During Auto Operation.
• It is impossible to alter the indoor fan speed during Auto Operation because it is already set
to the best position by Fuzzy rule.
• If the room air conditioner is not operating as desired, switch to cooling mode or other
mode.
• During Auto Operation, pressing the Air-flow direction control button makes vertical louver
swings up and down automatically according to 1/f rhythm. If you want to stop the 1/f swing
of the vertical louver, press again the Airflow Direction Control Button.
• Two short beeps will sound and the
operation lamp will light up.
• Operation mode, set temperature and fan speed are automatically
set by Fuzzy rule on the basis of sensing the room temperature.
• If you want to change the set temperature, press room
temperature setting button.
• The cooler or warmer you feel, the more times (up to two times)
you press the button.
• Then the set temperature will be changed automatically by micom
control.
To raise the Temperature. (When you feel too cool or cold)
To lower the Temperature. (When you feel too warm or hot)
Cooling Operation
Operation Display
Soft Dry Operation
(Heat pump model only)
Heating Operation
Auto Operation
Beep, Beep

(3) Sleep Mode-Auto Control Setting
( LED lamp ON)
• The Sleep Mode will be operated at a low fan
speed(Cooling) or a med. fan speed(Heating)
for quiet sleeping.
In Cooling mode
• The set temperature will be automatically
raised by 1°C 30 minutes later and by 2°C 1
hour later for comfortable sleeping.
• To cancel the Sleep Mode, press the button
several times until star pictograph on the
operation display disappears.
— 14 —
RESET
p.m.
Hr.
ON OFF
SET CANCEL
Remote Control
Press the Sleep Mode Auto
Button.
1. Press the Sleep Mode Auto Button and set
the time to turn off.
2. Check that the Sleep Mode Auto LED of
the room air conditioner has lighted.
3. The Timer is programmed by 1 hour each
pressing the sleep mode auto button from
1 hour to 7 hours.
Beep, Beep

(4) Airflow Direction Procedure
⁄A Vertical Airflow Direction Control
Airflow Direction Control
The airflow direction can be adjusted as desired by using the remote controller. This is effective
when you want to cool yourself directly, such as after taking a bath.
— 15 —
1Press the Start/Stop Button.
(Confirm the unit on operation.)
2Press the Airflow Direction Control
Button and the vertical louvers swing up
and down automatically.
3Press again the Airflow Direction Control Button to set the vertical louver at the
desired airflow direction.
Caution
• Always use the remote controller to adjust the
airflow direction. Manually moving the vertical
airflow direction louver by hand could cause
operation errors.
• When air conditioner operation is stopped,
the vertical airflow direction louver will close
the air outlet vent of room air conditioner.

— 16 —
⁄BHorizontal Airflow Direction Control
• Adjust the horizontal airflow direction by manually moving the horizontal airflow direction louver
by hand.
(5) Setting the Present Time
The present time can be set only when pressing the reset button or when replacing batteries for
the remote controller.
SET
1Press the Start/Stop Button after pressing
the RESET Button or changing batteries
for Remote Controller. 2Press the Time Setting Button until the
desired time is set.
3Press the Time SET Button.
NOTE : Check a.m. and p.m. Indicator in setting time.

RESET
ON
TIME
a.m.
p.m.
OFF
TIME
a.m.
p.m.
Hr.
ON OFF
SET CANCEL
1
2
34
AUTO
(6) ON/OFF Dual Timer Setting
( LED lamp ON)
— 17 —
1
2
3
4
Time Setting Button
Timer SET Button
To cancel the settings
If the settings are cancelled by a power
failure.
ON OFF
SET
Press the Timer Cancel button.
Press the Start/Stop Button, and then set
the timer again as desired time according to
Timer Setting Procedure.
ON Timer Button or OFF Timer
Button
CANCEL
Timer CANCEL Button
Remote Control
1Press the ON Timer Button or OFF Timer
Button.
The timer setting
will be displayed.
(The timer lamp on the air
conditioner and the display
will go out.)
2Change the Timer Setting and press the
Timer Set Button.
Heating
Cooling

Timer Setting Procedure
— 18 —
ON OFF
OFF
TIME
a.m.
ON
TIME
a.m.
ON
TIME
a.m. OFF
TIME
a.m.
ON
TIME
a.m. OFF
TIME
a.m.
1Confirm the present time.(Refer to page 16)
2Press ON Timer Button or OFF Timer Button.
Operation stops at OFF Timer Setting.
Operation starts at ON Timer Setting.
Operation stops at OFF Timer Setting and starts
at ON Timer Setting.
Operation starts at ON Timer Setting and stops at
OFF Timer Setting.
NOTE : Check a.m. and p.m. Indicator in setting
time.
● Select one of the following four types of
operation.
Delay
OFF Timer
Delay
ON Timer
Delay OFF
and ON Timer
Delay ON
and OFF Timer
3Press the Time Setting Button until the desired time is set. 4Set the Timer SET Button.
SET

(7) Operation Details
• Soft Dry Operation Mode
When the room temperature is higher than the set temperature, it operates cooling mode, the set fan
speed (if AUTO mode, then med.), and then it will switch to Soft Dry Operation Mode when the room
temperature reaches the set temperature.
In Soft Dry Operation Mode, the indoor fan speed is automatically switched to low.
• Auto Air
For fresh cooling more than other modes.
Press the Indoor Fan Speed Selector and set to Auto Air mode.
The Air flows from medium to low speed, or reversely by the room temperature.
The set temperature goes up by time automatically.
This mode economizes power consumption and prevents over-cooling (below Fig).
— 19 —
SET TEMP. +1°C
SET TEMP. -0.5°C
ROOM
TEMP
INDOOR
FAN
COMP.
OPERATING START
OPERATE OPERATE
FOR
10MINS
STOP
FOR
7 MINS
STOP
FOR
7 MINS
OPERATE
FOR
10MINS
SET
FAN
SPEED
¡ªLOW COOL
OPERATION ¡ª
LOW COOL
OPERATION
COOLING
ROOM TEMP.
SOFT DRY
1HOUR
1 /2HOUR
1
0.5°C
0.5°C
Room Temp.
AUTO AIR MODE OPERATION

Press the Forced Operation Button.
•Press the Forced Operation Button
once again to stop operation.
Operation procedures when the remote controller
can't be used.
Open the front panel upward and press the Forced
Operation Button.
If you want to stop operation, press again. During Forced
operation, the operating conditions are automatically set
as follows:
FORCED OPERATION
— 20 —
Helpful information
Airflow speed and cooling capacity
The cooling capacity indicated in the specification is the
value when the fan speed is set to high, and the capacity
will be lower at low or medium fan speed.
High fan speed is recommended when you wish to cool the
room quickly.
Forced
Operation Button
High
Speed
Open the front
panel upward
Heat pump Model
Cooling Model Room Temp ≥24°C 21°C < Room Temp ≤24°C Room temp < 21°C
Operating mode Cooling Cooling Soft Dry Heating
FAN Speed High High Soft Dry Rule High
Set Temp. 22°C 22°C Air Intake Temperature. 24°C