Rasonic RC-N921J Room Air Conditioner Instruction Manual

: October 27, 2023
: Rasonic

RC-N921J Room Air Conditioner

OPERATING INSTRUCTIONS

ROOM AIR CONDITIONER
RC-N921J ACXF55-32950

This symbol shows that this equipment uses a flammable refrigerant. If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.

This symbol shows that the Operating Instructions should be read carefully.

This symbol shows that service personnel should be handling this equipment with reference to the Technical Manual.

This symbol shows that there is information included in the Operating Instructions and/or Installation Instructions.

Before operating the unit, read these operating instructions thoroughly and keep them for future reference.

1 SAFETY PRECAUTIONS

Please observe these following safety precautions when using your air conditioner.
Failure or negligence in observing these safety precautions could cause fire, electrical shock or personal injury.

This sign warns of risk of death or serious injury.
This sign warns of risk of injury or damage to property.

This symbol (with a white background) denotes an action that is PROHIBITED.

These symbols (with a green background) denote actions that are COMPULSORY.

Do not install, remove and reinstall the unit yourself.
Improper installation may cause Leakage, electric shock or fire. Please engage an authorized dealer or specialist for the installation work.
Do not add or replace refrigerant other than the specified type.
It may cause product damage, burst and injury. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similar qualified persons in order to avoid hazard.

The appliance shall be stored in a room without continuously operating ignition sources
(for example: open flames, an operating gas appliance or an operating electric heater)
In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction.
Ventilate any enclosed areas when installing or testing the refrigeration system.
Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.
Confirm after installation that no refrigerant gas is leaking. If the gas comes in contact with a burning stove, gas water heater, electric room heater or other heat source, it can cause the generation of toxic gas.

The room air conditioner must be earthed.
Improper grounding could cause electric shock.
Do not install the unit in a place where there are explosive gas leaks.
Gas leaks near the unit could cause fire.
Ensure that the drainage piping is connected properly. Otherwise water will leak out.

Risk of fire / Flammable
materials

OPERATION PRECAUTION

WARNING: This sign warns of risk of death or serious injury.

Do not modify the length of power cord or use an extension cord.
Do not touch or operate with wet hands.
Do not modify or damage the cord.
Do not turn on the unit by inserting the power plug.
Do not switch off the unit by pulling out the power plug.
Avoid an extended period of direct airflow.
Do not Insert your fingers or other objects into the unit, rotating parts may cause injury.
Do not try to repair the unit yourself.
Plug in properly before operating and use a specified power cord.
If abnormal conditions (burnt smell, etc.) occur, switch off and
remove the power plug.
Confirm to authorized dealer or specialist on usage of specified
refrigerant type. Using of refrigerant other than the specified
may cause product damage, burst and injury etc.
This appliance is not Intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person
responsible for their safety. Children should be supervised to
ensure that they do not play with the appliance.

CAUTION: This sign warns of risk of injury or damage to property.

Do not use the unit for other purposes, than its intended use.
Do not remove the power plug by pulling the cord.
Do not block the air intake and outlet vanes.
Do not splash or direct water at the unit.
Do not expose the unit to direct sunlight during operation.
Do not operate the unit without the air filter installed
or when the front intake grille has been removed.
Do not place any objects on the unit.
Do not operate any combustion equipment near the unit’s
air flow area.
Do not sit or step on the unit, you may fall down accidentally.
Do not touch the sharp aluminum fin, sharp parts may
cause injury.
Do not use means to accelerate the defrosting process or to
clean, other than those recommended by manufacturer.
Switch off the breaker and unplug the unit from the socket
if the unit will not be operated for a long period.
Pay attention to any damages on the unit caused by
extensive usage.
Ventilate the room occasionally where the unit is installed.
Unplug the power cord when cleaning the unit.

2 PARTS IDENTIFICATION

parts idintification

Main Control Panel

main parts

INSTALLATION PROCEDURES

Remove the rear cabinet screws and two chassis locking brackets from the cabinet. Save for later use.
Slide the chassis out from the cabinet.
Place the cabinet into the installation hole.
Slide the chassis into the cabinet.
Lock the chassis to the cabinet reusing the
chassis locking brackets.
Depending upon the location of AC outlet,
route the AC cord to either left or right side
before instaling the front grille.
Attach the front grille to the cabinet
and fasten it with a screw.
Attach air filter to the front grille.
(see Anti-bacterial filter installation
instructions included in this package)
Position the intake grille horizontally and hook the
front grille fulcrum to the grille force arm.
Press down control panel and close the cover.

CONDENSED WATER DRAINAGE

This air conditioner employs a “Slinger-Up System” which is designed to splash the condensed water on the condenser coil for maximum cooling efficiency, thus producing a splashing sound. If the splashing sound annoys you, you can provide an outside drainage by using the following the procedure which may, cause a small loss of performance.
NOTE: If the unit is installed at a coastal area, drainage of condensed water is recommended to prevent easy condenser corrosion.

1. Remove the rubber plug and chassis locking bracket
from the cabinet. Then slides the chassis out from the
cabinet.

2. Install the drain pan

3. Connect a drain hose. Fit the drain hose to the drain pan.

NOTE: Drain hose or tubing can be purchased locally to satisfy
your particular needs.

4. Slide the chassis back into the cabinet. Lock the chassis to the cabinet reusing the chassis locking bracket. Reinstall the cabinet and chassis.

ELECTRIC WORK

Always use at the rated voltage and with a specific air conditioning circuit.
This equipment must be earthed and strongly recommended to be installed with Earth
Leakage Circuit Breaker
(ELCB) or Residual Current Device (RCD). Otherwise, it may cause electric shock or fire in case of malfunction.
Time delay fuse or circuit breaker rating is 16 Ampere.
Nominal cross sectional area of power supply wire must be 3 core x 1.5 mm2 or above.
The power supply must be from an independent circuit.
All electrical installations must be made in accordance with local wiring and safety regulation wherever applicable.
There must be a double pole switch with a minimum of 3.5 mm contact gap in the fixed installation circuit.
Please engage and authorized dealer or specialist for the installation work.

3 AIR CONDITIONER OPERATION

OPERATION CONDITIONS
Use the air conditioner under the following conditions:
Operating temperature range.
Continuous operation at over 90% high humidity may create condensation and result in
waterdrops on the intake and outlet vanes.

(unit in °C)

| Indoor side| Outdoor side
---|---|---
D.B.T| W.B.T.| D.B.T.| W.B.T.
Max. Temperature| 32| 23| 43| 26
Min. Temperature| 21| 15| 21| 15

Operating temperature range.

Continuous operation at over 90% high humidity may create condensation and result in waterdrops on the intake and outlet vanes.

Avoid installation in the following locations.
Mechanical processing plants and other places with a lot of mechanical oil.
High humidity areas such as laundry room and bathroom.
Air conditioner normal operating temperature.
In side maximum temperature 30℃
Out side maximum temperature 43℃

NOTICE: When the air conditioner is used at room temperature of 21 degrees or less,
the temperature may be too low, and the air conditioner may be easily frosted. After frosting, it may be difficult to drain and may flow into the room.

1

Main Control Knob
Set to LOW COOL or HIGH COOL as desired.
(FAN setting operates the fan only.)
Caution: If the main control knob is turned off or changed to a fan setting
from a cooling operation setting, WAIT at least 3 minutes before
resetting to cooling operation.

2

Thermostat Control Knob
Set the thermostat control knob to your desired setting. (Usually 6 – 7 is
recommended). If the room temperature is not as desired after a reasonable
period of time, turn the thermostat control knob clockwise to cool the room
more or counter clockwise to cool the room less.
When the thermostat control knob is set to 10, moisture may freeze on
the evaporator fins and prevent effective cooling. If this happens, turn
the Main Control Knob to HIGH FAN and the Thermostat Control Knob
counter-clockwise. This will quickly defrost the evaporator fins to resume
normal cooling operation.

3.

Air Swing Switch
(Airflow direction adjustment Side-to-Side)
To obtain a fix airflow direction, set the air swing switch to “ON” for the
vanes to swing from side to side until the desired flow direction is reached,
then switch it to “OFF”.
For continuous side-to-side air cirulation set the air swing switch to “ON”.

AIR CONDITIONER INSTALLATION

CHOOSING THE INSTALLATION LOCATION

When installing, use the nearest power outlet. Make sure the power outlet is easy
to reach so you can quickly disconnect your air conditioner in case of emergency.
Ensure that the air conditioner is well supported, securely fastened, easily reachable
and not obstructed.
Avoid location with: salty or sulphureous air, draughts, dampness and flammable gas.
If you install the drainage system, be sure to channel the condensed water to a
suitable location.
Covers, obstructions and unsteady support may cause excessive operating noise and vibration.
The rear end of the air conditioner is splash proof. You don’t need to shield or cover it.
R32 refrigerant air conditioner installation and maintenance should be done by competent person.

PREPARATIONS BEFORE INSTALLATION

Dimension

There should not be any obstacles surrounding
the unit.
Prepare and installation hole slightly bigger than the
cabinet size.
Left and right side of the unit should be at least
15 cm away from the wall.
The minimum installation height is 75cm.(Based on IEC 60335-2-40, there is no restriction for the
minimum installation floor area since the refrigerant charges
is less than 1.224kg.

CAUTION POINT DURING INSTALLATION

When installing air conditioner at glass window or thin partition, fix the vertical and side supporting bar to the concrete wall in order to support the weight of the air-conditioner and reduce the vibration that is being transferred to the glass window or thin partition. This can minimize the noise problem caused by improper installation.

Proposed to use 1/8” x 1-1/4” angle aluminums for installation frame and side supporting bar.

REMOVAL OF FRONT GRILLE

1. Open the Intake Griille until over 90°
front grille fulcrum can remove from Grille force arm.

2. Remove the air filter.
Tilt up and pull out the air filter by the holder.

3. Remove the front grille.
a. Remove the screw on the front grille.
b. At the bottom right side of the front grille,
press inward on the cabinet near the power
cord, and pull the grille outward to the right
until right tab releases.
c. At the bottom left side, push inward on the
cabinet and pull the grille outward to the left
to release the left tab. Do not pull the bottom
edge towards to you for more than 3 inches to
prevent the two top tabs from damage.
d. Slide the front grille upwards to loosen the two
top tabs from slots at the top of the cabinet.

NOISE CONSIDERATION

Select an installation location that can support the weight of the air
conditioner and one that will not cause increased operating noise
and vibration.
Ensure that when installed, airflow and noise from the rear side of the
unit (outdoor) do not disturb neighboring elements.
Obstacles placed in front of the air outlet on the rear side of the unit
(outdoor), or covers placed over it will cause excessive noise and
deterioration in performance.

TRANSFERRING

Repositioning or transfer of the air conditioner due to renovation or moving requires an additional service charge. Please consult your dealer before moving.

5. ENERGY SAVING HINTS

Do not overcool the room. This may affect your well-being as well as increase power consumption.
The cooling capacity of the room air conditioner must match the room size for efficient and satisfactory operation.
Keep all doors and windows closed. Prevent hot air from entering and cool air from escaping.
Ensure that curtains and drapes are always closed to keep out direct sunlight during cooling operation.
Avoid heat.
Clean the air filter every 2 weeks. Dirty filters may reduce cooling efficiency.

6. CARE AND MAINTENANCE

Clean the cabinet, front grille with mild soap or detergent and lukewarm water.
The front intake grille can be easily removed for cleaning purposes (refer to Remove the front intake grille procedures). Gently wash it with water and a sponge.
The filter can be easily cleaned using a vacuum cleaner. Vacuum the front of the filter and then wash the rear with water. If it is badly spoiled, wash with a mild household detergent.
Do not clean with benzene, thinner, scouring powder or cloth soaked in caustic chemicals.
If the unit is extremely dirty, heat transfer is less efficient and the unit may not cool effectively. Contact Shun Hing Electric Service Center Ltd. for an annual check. (Annual check is not covered by the warranty.)
If the air filter becomes clogged with dust, the cooling capacity will drop, and 6% of the electricity used to operate the air conditioner will be wasted.

NOTE: Do not dry the front panel or the air filter in direct sunlight.
(Exposure to direct sunlight may discolour or deform the panel.)

PRE-SEASON INSPECTION
Is the discharged air cold?

After 15 minutes of operation, it is normal for the temperature difference between intake and outlet air to be more than 8°C for cooling.

Are the air intake and outlet vanes of the indoor and outdoor side obstructed?
Are the remote control batteries weak?

RECOMMENDED INSPECTION

Usage over several seasons will reduce performance as the unit becomes dirty. A dirty unit may produce foul odours and dust may clog the dehumidifying drainage. Seasonal inspection is recommended in addition to regular cleaning. Consult Shun Hing Electric Service Centre Ltd.,

BEFORE CALLING FOR SERVICE

Check the following points before calling for repairs or service.
If the malfunction persists, please contact Shun Hing Electric Service Centre Ltd.,

Condition 1: If the unit is too noisy during operation.

The following sounds are normal during operation:

A low humming sound indicating that the unit is operating.
A soft clicking sound when the compressor turns on and off.
A flowing sound due to circulation of the refrigerant when the compressor is turned on.
A splashing sound indicating condensation in the condenser coil. If you hear other noises, please consult Shun Hing Electric Service Centre Ltd.,

Condition 2: If the unit does not operate.

The main power cord is not plugged in.
The main circuit breaker has tripped.

Condition 3: If the unit does not cool properly.

The room is too big for the unit’ s capacity.
The ventilation lever is set to OPEN
The air circulation is impeded by curtains or furniture.
After 15 minutes of operation, it is normal for the temperature difference between intake and outlet air to be more than 8°C for cooling.

Condition 4: If water drips off the rear of the unit.

Humidity is high.
Condensed water is overflowing.
To rectify the problem, mount an optional drain pan to the unit.

Condition 5: If water drips inside the room.

The unit is tilted inward. To rectify this, tilt the unit slightly outward.
Mount the optional drain pan if you prefer.
The drain pan may be blocked.

Condition 6:

Squeaking noise during operation,
Squeaking noise after shutting down (This is due to the expansion or contraction of the model due to temperature changes)

Information for Users on Collection and Disposal of Old Equipment and used Batteries

[Information on Disposal in other Countries outside the European Union] These symbols are only valid in the European Union. If you wish to discard these items, please contact
your local authorities or dealer and ask for the correct method of disposal.

Note for the battery symbol (bottom two symbol examples):
This symbol might be used in combination with a chemical symbol. In this case it complies with the requirement set by the Directive for the chemical involved.

To call Shun Hing Electric Service Centre Ltd. IMMEDIATELY
Turn off the power and contact Shun Hing Electric Service Centre Ltd.
as soon as any of the following events occur.

The circuit breaker frequently trips or the fuse blows regularly.
If water or foreign objects have accidentally entered the air conditioner.
If there is abnormal sound during operation.

NOTE:
1. The enclosure opposing the room side is splash proof (IPX4).
2. Do not install this appliance in a laundry room or other locations where water may drip from the ceiling, etc.
3. If the supply cord is damaged or need to be replaced, it must be replaced by the manufacturer or its service agent or a similarly qualified person in order to avoid a hazard.

IMPORTANT

The wires in this mains lead are coloured in accordance with the following code: Green Yellow: Earth Blue: Neutral Brown: Live

“As the coulours of the wires in the mains lead of this appliance my not correspond with the coloured markings identifying the terminals in your plug,
proceed as follows:
The wires which is coloured green and yellow must be connected to the terminal in the plug which is marked by the letter E or by the safety earth
symbol or coloured green or green and yellow. The wire which is coloured blue must be connected to the terminal which is marked with letter N
or coloured black. The wire which is coloured brown must be connected to the terminal which is marked with letter L or colour red.”
(NOTE: Replacement of installation of power plug shall be performed only by authorized/qualified personnel.)