NEC RC75 User manual

MODEL NO: RC75, RC76, RC94, RC95, RC96
RH120, RH129, RC124, RC125
RH189, RH190, RC245, RC246
RH240, RH241
HEATER
1
2
COOLER WARMER
THERMOSTAT OPERATION
1
2
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.

Operating Instructions
Installation Instructions
Troubleshooting Tips
2
Safety Precautions
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Serial #
You can find them on a label on the side of each unit.
Dealer's Name
Date Purchased
Inside you will find many helpful hints on how to use and
maintain your air conditioner properly. Just a little preventive
care on your part can save you a great deal of time and
money over the life of your air conditioner.
You'll find many answers to common problems in the chart
of troubleshooting tips. If you review our chart of
Troubleshooting Tips first, you may not need to call for
service at all.
READ THIS MANUAL
CAUTION
• Contact the authorized Service technician for repair
or maintenance of this unit.
• Contact the installer for installation of this unit.
• The air conditioner is not intended for use by young
children or infirm persons without supervision.
• Young children should be supervised to ensure that
they do not play with the air conditioner.
Safety precautions
Safety Precautions.............3
Operating Instructions
About the Controls on the Air
Conditioner.........................5
Care and Maintenance ......8
Installation Instructions
Features and
Installation .........................9
Troubleshooting tips
Before You
Call for Service.................14

WARNING
3
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Important Safety Precautions
Read all instructions before using
To prevent injury to the user or other people and property damage, the following instructions must be
followed.
■Incorrect operation due to ignoring of instruction will cause harm or damage, the seriousness is classified
by the following indications.
WARNING : This symbol indicates the possibility of death or serious injury.
CAUTION :This symbol indicates the possibility of injury or damage to
properties only.
■Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
Plug in the power plug
properly.
• Otherwise, it will cause electrical
shock or fire due to heat
generation.
Do not operate or stop the
unit by inserting or pulling
out the power plug.
• It will cause electrical shock or
fire due to heat generation.
Do not damage or use an
unspecified power cord.
• It will cause electrical shock or fire.
• If the power cord is damaged, it must
be replaced by the manufacturer or
its service agent or a similarly
qualified person in order to avoid a
hazard.
Do not modify power cord
length or share the outlet
with other appliances.
• It will cause electrical shock or
fire due to heat generation.
Do not operate with wet
hand or in damp
environment.
• It will cause electrical shock.
Do not direct airflow at room
occupants only.
• This could damage your health.

Sharp
edges
4
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
When the air filter is
to be removed, do not
touch the metal parts
of the unit.
•It may cause an injury.
Do not clean the air
conditioner with
water.
•Water may enter the unit
and degrade the
insulation. It may cause
an electric shock.
Ventilate well when
used together with a
stove, etc.
•An oxygen shortage may
occur.
When the unit is to be
cleaned, switch the
unit off, and unplug
it.
•Since the fan rotates at
high speed during
operation, it may cause
an injury.
Do not put a pet or house
plant where it will be exposed
to direct air flow.
•This could injure the pets or
plants.
Do not use for special
purposes.
•Do not use this air conditioner to
preserve precision devices, food,
pets, plants, and art objects.
It may cause deterioration of
quality, etc.
Do not operate switches
with wet hands
.
•It may cause an electric shock.
Do not apply an insecticide
or flammable spray.
•It may cause a fire or deformation
of the cabinet.
Do not put a heater, etc.
where it is exposed to direct
air flow.
•
It may cause imperfect
combustion.
SHARP EDGES!
The edges of the case can
be SHARP!
•Use caution when handling the
case. Grip it firmly and do not allow
it to slip while holding it.
•
Use heavy gloves to handle the case if
necessary.
• DO NOT
allow the
case to slide
against
your skin!

o
1
Thermostat Operation
2
3
4
9
8
7
6
5
Off
Med
Fan
Low
Fan
High
Cool
Med
Cool
Low Cool
C
o
o
l
e
r
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
5
About the Controls on the air conditioner
The controls will look like the following.
Controls
THERMOSTAT
Thermostat will automatically control the
temperature of the room. Select higher
number for lower room temperature. The
temperature is selected by turning the knob
to the desired position.
The 5or 6position is a normal setting for
average conditions.
AUTO SWING
(Only Auto Swing Models)
ON : Air swing is operated while
OPERATION knob is set to the
COOL position.
OFF : Stops the operation of air swing.
OPERATION
OFF ( ): Turns the air conditioner
off.
MED FAN ( ) : Permits medium fan
speed operation without
cooling.
LOW FAN ( ) : Permits low fan speed
operation without
cooling.
HIGH COOL ( ) : Permits cooling with high
fan speed operation.
MED COOL ( ) : Permits cooling with
medium fan speed
operation.
LOW COOL ( ) : Permits cooling with low
fan speed operation
o
• CAUTION
When the air conditioner has been performing its cooling operation and is turned off or set to the
fan position, wait at least 3 minutes before resetting to the cooling operation again.

OFF
AUTO SWING
HEATER
ON
HEATER
1
2
COOLERWARMER
THERMOSTAT OPERATION
THERMOSTAT OPERATION THERMOSTAT OPERATION
1
2
HEATER
1
2
COOLER WARMER
THERMOSTAT OPERATION
1
2
COOLERWARMER COOLERWARMER
6
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
OPERATION
OFF ( ) : Turns the air conditioner off.
LOW FAN ( ) :
Permits the low fan speed operation
without cooling (heating).
LOW COOL ( ) : Permits cooling with the low fan
speed operation.
HIGH COOL( ) : Permits cooling with the high fan
speed operation.
LOW HEAT ( ) : Permits heating with the low fan
speed operation.
HIGH HEAT ( ) : Permits heating with the high fan
speed operation.
HEATER LAMP
When the unit sets heating operation condition, the
green lamp is lighted.
When the frost settles on the heat exchanger of the
outside, defrosting is made automatically and the
green lamp is unlighted.
The unit may give a “hiss” and the fan motor stops
for 1 to 10 minutes.
This should not be regarded as the trouble. After
defrosting, the heating operation begins again.
2
1
1
2
•CAUTION
When the air conditioner has been performing its cooling operation and is turned off or set to the
fan position, wait at least 3 minutes before resetting to the cooling operation again.
THERMOSTAT
Turn the thermostat control to the desired setting.
The control position is a normal setting for average
conditions. You can change this setting, if
necessary, in accordance with your temperature
preference.
The thermostat automatically controls cooling or
heating, but the fan runs continuously whenever the
air conditioner is in operation. If the room is too
warm, turn the thermostat control clockwise. If the
room is too cool, turn the themostat control
couuterclockwise.
AUTO SWING
(Only Auto Swing Models)
ON : Air swing is operated while
OPERATION knob is set to the
COOL or HEAT psition.
OFF : Stops the operation of air swing.
The controls will look like the following.
Controls

VENTCLOSE OPEN
Part A
Part B
7
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Additional controls and important information
Vent Control
The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions.
When fresh air is necessary in the room, set the ventilation lever to the OPEN position.
The damper is opened and room air is exhausted.
Air Direction
The direction of air can be controlled horizontally or vertically by using the horizontal louver or vertical
louver.
• HORIZONTAL AIR-DIRECTION
- Not Auto Swing Models
The horizontal air direction is adjusted by
moving the inside louvers to the left or
right.
- Auto Swing Models
The horizontal air direction is
automatically controlled by setting the
AUTO SWING switch to the ON position.
• VERTICAL AIR-DIRECTION CONTROL
The vertical air direction is adjusted by
rotating the horizontal louver forward or
backward.
NOTE: Before using the ventilation feature, make
a ventilaiton kit. First, pull down part
to horizontal line with part .

0
Air Filter
The air filter behind the front grille should be
checked and cleaned at least once every 2
weeks or more often if necessary.
To remove:
Open the inlet grille upward by pulling out
the bottom of the inlet grille.
Using the tab, pull up slightly on the filter to
release it and pull it down.
Clean the filter with warm, soapy water
below 40°C (104°F).
Rinse and gently shake the water from the
filter and let it dry before replacing it.
CAUTION: DO NOT operate the air conditioner
without a filter because dirt and lint will clog it
and reduce performance.
8
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Grille and Case
Turn the air conditioner off and remove the plug
from the wall outlet before cleaning. To clean, use water and a mild detergent. Do
not use bleach or abrasives.
Outdoor Coils
The coils on the outdoor side of the air
conditioner should be checked regularly. If they
are clogged with dirt or soot they may be
professionally steam cleaned, a service
available through a dealer.
Care and maintenance of the air conditioner

Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
9
Features
In humid weather, excess water may cause the BASE PAN to
overflow. To drain the water, remove the DRAIN CAP and
secure the DRAIN PIPE to the rear hole of the BASE PAN.
(except heat pump models)
The air conditioner employs a proper drain method
whereby the condensate water (moisture removed from
the air) is drained to the outside.
In very humid weather, (and for reverse cycle models in the
reverse mode) excessive condensate water removed from the
air may cause some water to collect. To remove this excess
water you can install the drain pan as detailed below. (for heat
pump models and over 18K cooling models)
1. Take the drain pan which is shipped in the air discharge or
on the barrier.
2. Remove the rubber plug from the bottom of the base pan.
3. Install the drain pan over the corner of the cabinet where you
removed the plug with 4 (or 2) screws.
4. Connect the drain hose to the outlet located at the bottom of
the drain pan.
You can purchase the drain hose or tubing locally to satisfy
your particular needs. (Drain hose is not supplied).
5. Select the most appropriate connection from among the
following figures (by considering the hole of the unit) to fit
drain pan to your own unit.
1 67 2 345
10 8 9 12 14
13 11
Drain pipe
Drain cap
DRAIN
PAN DRAIN HOSE
CABINET SCREW
Features and Installation
Learning parts name prior to installation will help you understanding the installation procedure.
1. CABINET
2. HORIZONTAL AIR
DEFLECTOR
(VERTICAL LOUVER)
3. VERTICAL AIR
DEFLECTOR
(HORIZONTAL LOUVER)
4. AIR DISCHARGE
5. FRONT GRILLE
6. AIR INTAKE
(INLET GRILLE)
7. AIR FILTER
8. CONTROL BOARD
9. POWER CORD
10. EVAPORATOR
11. CONDENSER
12. COMPRESSOR
13. BASE PAN
14. BRACE
Drainage

Installation
1. To avoid vibration and noise, make sure the unit is installed securely and firmly.
2. Install the unit where the sunlight does not shine directly on the unit.
If the unit receives direct sunlight, build an awning to shade the cabinet.
3. There should be no obstacle, like a fence, within 50cm which might restrict heat radiation from
the condenser.
4. Install the unit a little obliquely outward not to leak the condensed water into the room (about
10mm).
5. Install the unit with its bottom portion 75-150cm above the floor level.
6. The power cord must be connected to an independent circuit. The green wire must be
grounded.
Note
ABOUT 10mm
Over 50cm
HEAT
RADIATION
FENCE
GASKET AWNING
COOLED AIR
75~150cm
10
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
All side louvers of the cabinet must
remain exposed to the outside of the
structure.
CAUTION
COOLING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
32°C
21 °C 43 °C 21 °C
HEATING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
27°C 20 °C 24 °C 1 °C
■ Do not install, remove and reinstall the unit by yourself.
•Improper installation will cause water leakage, electrical shock, or fire. Please consult authorized
dealer or specialist for the installation work. Please note fault caused by improper installation is
not covered by warranty.
•Unit must be installed in an easily accessible area. Any additional cost required to hire a special
equipment to service the unit will be the responsibility of the customer.
■ The reverse cycle system of the air
conditioner is based on the air cooling type
heat pump which absorbs heated air from the
outdoor and discharges it indoor.
Therefore if the outdoor is exposed to very
low temperature, specifically below 0°C, the
heating capacity drops off rapidly. In this
case, we recommend customers don’t
operate the air conditioner.
OPERATING TEMPERATURE

11
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Shipping screws
EPS Material
Power cord
Screw
Screw
1. Remove the screws which fasten the cabinet
at both sides and at the back.
2. Slide the unit from the cabinet by gripping
the base pan handle and pulling forward
while bracing the cabinet.
3. Remove EPS Material (for some Models).
4. Slide the unit into the cabinet.
CAUTION: For security purpose, reinstall
screw at cabinet's sides.
5. Attach the front grille to the cabinet by
inserting the tabs on the grille into the tabs
on the fornt of the cabinet. Push the grille in
until it snaps into place.
6. Lift the inlet grille and secure it with a screw
through the front grille.
Installation Instructions

NOTE: UNIT MAY BE SUPPORTED BY A
SOLID FRAME FROM BELOW OR
BY A HANGER FROM A SOLID
OVERHEAD SUPPORT.
FLASH OR SEAL AROUND EXTERNAL
WALL FRAME OR ARCHITRAVE
STURDY TIMBER
FRAME ALL ROUND
UNIT
DRAIN CHUTE
EXTERNAL SUPPORT
FRAME AT BALANCE
POINT OF RAC
Preferred method of installation into
a timber framed wall, partition or window.
Alternative method of installation if external
support cannot be provided.
ALTERNATIVELY, BRACKETS
AS ILLUSTRATED BELOW
MAY BE USED.
TIMBER FRAMED
WALL OR PARTITION
FLASH OR SEAL AROUND EXTERNAL
WALL FRAME OR ARCHITRAVE
ENSURE LOUVRES
ARE ENTIRELY
OUTSIDE THE WALL.
DRAIN CHUTE
STURDY TIMBER
FRAME
STEADYING BRACKET
(ONE PER SIDE)
SOLID TIMBER SUPPORT
TIMBER FRAMED
WALL OR PARTITION
12
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Installation of the Housing
Installations of the unit into the Housing
Step 1
Remove the air conditioner from it’s packaging and slide the air
conditioner out of it’s housing.
Step 2
Prepare the hole in the wall so that the bottom of the housing is
well supported, the top has minimum clearace and the air inlet
louveres have clearance as shown. Holes from the outside through
to the cavity should be sealed. The housing should slope down
towards the rear by about 5mm to allow water formed during
operation to drain.
Step 3
Install the housing into the wall and secure. Ensure the foam seals
are not damaged. Flash, seal or fill gaps around the inside and
outside to provide satisfactory appearance and protection against
the weather, insects and rodents.
1. Slide the unit into the housing until it is firmly against the rear
of the housing. Care is required to ensure the foam sealing
strips on the housing remain in position.
2. Connect the air conditioner to the power and coil excess
cord length beneath the air conditioner base or control box.
3. Engage the Chassis Lock into the bottom housing rail and
secure to the base with the screw provided.
4. Remove the front panel from it’s carton and plastic bag and
fit as per the Operating Instruction.
5. Switch unit on. Check for operation of the unit and check for
vibration in the installation.
6. Fit the drain chute to the housing and run a drain line to a
suitable location if required.
It is necessary to ensure that the side louvres are not obstructed when installing into the wall.

100mm minimum
AIR IN
AIR IN
AIR IN
AIR OUT
OPTION A
100mm
100mm
LOUVRE
FRONT
45°BRICK CUT AWAY
TO CLEAR LOUVRES 45°BRICK CUT AWAY TO CLEAR LOUVRES
BRICK
WALL
BRICK
WALL
AIR IN AIR IN
AIR OUT
TOP
VIEW
OPTION B
13
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Installstions of the Unit into the Wall

14
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Before you call for service...
Troubleshooting Tips
Save time and money! Review the chart below first and
you may not need to call for service.
Problem Possible Causes What To Do
■ The air conditioner is
unplugged.
■ The fuse is blown/circuit
breaker is tripped.
■ Power failure.
■ Airflow is restricted.
■ The THERMOSTAT may
not be set high enough.
■ The air filter is dirty.
■ The room may have been
hot.
■ Cold air is escaping.
■ Cooling coils have iced up.
■ Ice blocks the air flow and
stops the air conditioner
from cooling the room.
•Make sure the air conditioner plug is pushed
completely into the outlet.
•Check the house fuse/circuit breaker box and
replace the fuse or reset the breaker.
•If power failure occurs, turn the mode control to OFF.
When power is restored, wait 3 minutes to restart the
air conditioner to prevent tripping of the compressor
overload.
•Make sure there are no curtains, blinds, or furniture
blocking the front of the air conditioner.
•Turn the knob to a higher number. The highest
setting provides maximum cooling.
•Clean the filter at least every 2 weeks.
See the operating instructions section.
•When the air conditioner is first turned on you need
to allow time for the room to cool down.
•Check for open furnace floor registers and cold air
returns.
•Set the air conditioner's vent to the closed position.
•See Air Conditioner Freezing Up below.
•Set the mode control at LOW fan or HIGH cool with
the thermostat at 1or 2.
Air conditioner
does not start
Air conditioner
does not cool as it
should
Air conditioner
freezing up
Normal Operating
•You may hear a pinging noise caused by water being picked up and thrown against the condenser
on rainy days or when the humidity is high. This design feature helps remove moisture and improve
efficiency.
•You may hear the thermostat click when the compressor cycles on and off.
•Water will collect in the base pan during high humidity or on rainy days. The water may overflow
and drip from the outdoor side of the unit.
•The fan may run even when the compressor does not.
Abnormal Operation

P/NO. 3828A20109H
NEC AUSTRALIA PTY LTD
A.C.N. 004 803 490