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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 or 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

Summary of Contents for RC124

Page 1: ...EC 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 ...

Page 2: ...e 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 childr...

Page 3: ...ow 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 ...

Page 4: ... 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 fi...

Page 5: ... 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...

Page 6: ...d 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 con...

Page 7: ...ction 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 ...

Page 8: ...t 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 Th...

Page 9: ...rier 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 amo...

Page 10: ...he 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 ...

Page 11: ...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...

Page 12: ...ed 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 ...

Page 13: ...E 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 ...

Page 14: ...urtains 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 conditio...

Page 15: ...P NO 3828A20109H NEC AUSTRALIA PTY LTD A C N 004 803 490 ...

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