NEC RH188 User manual

MODEL NO: RH188
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 ......7
Installation Instructions
Features and
Installation .........................8
Troubleshooting tips
Before You
Call for Service.................11

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.

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 off, and turn
off the breaker.
• 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 pet or plant.
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 is exposed to direct air
flow.
• It may cause imperfect
combustion.

OFF
AUTO SWING
HEATER
ON
1
2
COOLERWARMER
THERMOSTAT OPERATION
1
2
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
5
About the Controls on the air conditioner
Controls
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.
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 counterclockwise.
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
stopes for 1 to 10 minutes.
This should not be regarded as the trouble.
After defrosting, the heating operation begins
again.
AUTO SWING
ON : Air swing is operated while
OPERATION knob is set to the
COOL or HEAT position.
OFF : Stops the operation of air swing.
1
2
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.
The controls will look like one of the following.

Part A
Part B
CLOSE VENT OPEN
6
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Additional controls and important information.
Vent Control
The ventilation lever must be 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
CONTROL
To control horizontal direction of air flow,
set to the ON position the air-swing switch
and the air flow will be swept horizontally
by the automatic air-swing system.
If you want to stop the air flow from
moving, switch off the air swing switch at
the desired position of the vane.
• VERTICAL AIR-DIRECTION CONTROL
The vertical air direction is adjusted by
moving the horizontal louver.
NOTE: Before using the ventilation feature,
make the lever, as shown. First, pull
down part to horizontal line with part .
A B

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.
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
7
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

1 7 2 345
10 149 1112 13
6
8
8
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
Features and Installation
Features
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
1. Pull down front grille from the cabinet top.
2. Push front grille's tips toward the cabinet in
order to insert front grille's tabs into the
cabinet.
3. Open the inlet grille.
4. Tighten the screw through the front grille
into the base pan.
5. Close inlet grille.
How to attach Front grille to Cabinet

9
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
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.
PREFERRED METHOD
ABOUT 10mm
Over 50cm
HEAT
RADIATION
FENCE
GASKET AWNING
COOLED AIR
75-150cm
All side louvers of the cabinet must remain exposed to the outside of the structure.
■ 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.
Note
OPERATING TEMPERATURE(°C)
COOLING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
32 21 43 21
HEATING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
27 20 24 1
CAUTION

CABINET
DRAIN PAN
SCREW
DRAIN HOSE
10
Safety Precautions
Operating Instructions
Installation Instructions
Troubleshooting Tips
The air conditioner employs a proper drain method whereby the condensed 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 condensed
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.
1. Take the drain pan which is located in the air discharge or on the barrier.
2. Remove the hole rubber from the base-pan(for some models).
3. Install the drain pan to the left corner of the cabinet 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.)
How to attach Drain Pan

11
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 with the
thermostat at the middle position.
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

34
NEC Service Centres
NEC Australia Pty. Ltd.
ABN 86 001 217 527
Home Electronics Group
NEW South Wales
Sydney 184 Milperra Rd, Revesby 2212 (02)9780 8688
Newcastle 120 Parry Street, Newcastle 2302 (02)4926 2466
Victoria
Melbourne Unit 1 / 6 Garden Road Clayton 3168 (03) 8562 6245
Queensland
Brisbane Unit4/305 Montague Road West End 4101 (07)3840 5858
Southport Shop 1, 48 Ferry Rd, Southport 4215 (07)5591 3670
South Australia
Adelaide 84A Richmond Rd, Keswick, 5053 (08)8375 5710
Western Australia
Perth 45 Sarich Court, Osborne Park 6017 (08)9445 5901
For Service in outer areas, please contact your NEC retailer for the address of the nearest
Authorized NEC Service Centre.
NEC Australia Pty. Ltd.
244 Beecroft Road EPPING 2121
Tel. 131-632 Fax. [phone]
NEC Service Centres PHONE 131-632
From any where in Australia