INVENTOR V4MDI-12B Bedienungsanleitung

DUCT TYPE

MODELS:

V4MDI-12B

U4MRS-12B

AIR CONDITIONING SYSTEMS

• USER’S MANUAL

• ΕΓΧΕΙΡΙΔΙΟ ΧΡΗΣΗΣ

• MANUAL UTILIZATORULUI

ENGLISH | ΕΛΛΗΝΙΚΑ | ROMANA

Page 2 

Table of Contents

Owner’s Manual

Indoor Unit Parts and Major Functions

Manual Operations................................................... 07

SAFETY

FIRST

Safety Precautions.................................................... 04

.......... 05

Page 3 

Care and Maintenance............................. 08

a. Unit Maintenance....................................... 08

b. How to Clean the Air Filter....................... 08

c. Repairing Refrigerant Leaks...................... 09

d. Preparation for Periods of Non-use........ 09

Troubleshooting................................. 10

a. Common Problems........................... 10

b. Troubleshooting Tips......................... 11

Disposal Guidelines ................................. 13

Page 3 

Table of Contents

Owner’s Manual

Indoor Unit Parts and Major Functions

Manual Operations................................................... 07

SAFETY

FIRST

Safety Precautions.................................................... 04

.......... 05

Page 3 

Care and Maintenance............................. 08

a. Unit Maintenance....................................... 08

b. How to Clean the Air Filter....................... 08

c. Repairing Refrigerant Leaks...................... 09

d. Preparation for Periods of Non-use........ 09

Troubleshooting................................. 10

a. Common Problems........................... 10

b. Troubleshooting Tips......................... 11

Disposal Guidelines ................................. 13

Page 4 

Thank you for purchasing this air conditioner. This manual will provide you with information on how

to operate, maintain, and troubleshoot your air conditioner. Following the instructions will ensure the

proper function and extended lifespan of your unit.

Please pay attention to the following signs:

Safety Precautions 1

Failure to observe a warning may result in death. The appliance must be

installed by installers or contractors who are licensed HVAC professionals

and in compliance with all local, state and provincial laws.

Failure to observe a caution may result in injury or equipment damage.

WARNING

CAUTION

WARNING

• Ask an authorized dealer to install this air

conditioner. Inappropriate installation may

cause water leakage, electric shock, or ﬁre.

• The warranty will be voided if the unit is not

installed by professionals.

• If abnormal situation arises (like burning

smell), turn oﬀ the power supply and call

your dealer for instructions to avoid electric

shock, ﬁre or injury.

• DO NOT

let the indoor unit or the remote

control get wet. It may cause electric shock

or ﬁre.

• DO NOT

insert ﬁngers, rods or other objects

into the air inlet or outlet. This may cause

injury, since the fan may be rotating at high

speeds.

• DO NOT

use a ﬂammable spray such as hair

spray, lacquer or paint near the unit. This

may cause ﬁre or combustion.

CAUTION

• DO NOT touch the air outlet while the swing

ﬂap is in motion. Fingers might get caught

or the unit may break down.

• DO NOT inspect the unit by yourself. Ask an

authorized dealer to perform the inspection.

•

To prevent product deterioration, do not use

the air conditioner for preservation purposes

(storage of food, plants, animals, works of

art, etc.).

• DO NOT operate the air conditioner with

wet hands. It may cause electric shock.

• DO NOT touch the evaporator coils inside

the indoor unit. The evaporator coils are

sharp and may cause injury.

• DO NOT place items that might be aﬀected

by moisture damage under the indoor unit.

Condensation can occur at a relative

humidity of 80%.

• DO NOT

expose heat-producing appliances

to cold air or place them under the indoor

unit. This may cause incomplete combustion

or deformation of the unit due to the heat.

•

After long periods of usage, check the

indoor unit to see if anything is damaged. If

the indoor unit is damaged, it may fall and

cause injury.

•

If the air conditioner is used together with

other heating devices, thoroughly ventilate

the room to avoid oxygen deﬁciency.

• DO NOT

climb onto or place objects on top

of the outdoor unit.

• DO NOT

operate the air conditioner when

using fumigant insecticides. The chemicals

may become layered with the unit and

endanger those who are hypersensitive to

chemicals.

• DO NOT

let children play with the air

conditioner.

•

DO NOT

operate the air conditioner in a wet

room (e.g. bathroom or laundry room). This

can cause electrical shock and cause the

product to deteriorate.

Page 5 

Indoor Unit Parts And Major Functions 2

Unit Parts

Fig. 2.1

Operating Conditions

Use the system under the following temperatures for safe and eﬀective operation. If the air

conditioner is used under diﬀerent conditions, it may malfunction or become less eﬃcient.

Air outlet

Air inlet

Air filter(on some models)

Drain hose

Electric control cabinet

Refrigerant connecting pipe

•

An all-pole disconnection device which has at

least 3mm separation distance in all pole and

a residual current device (RCD) with the rating

of above 10mA shall be incorporated in the

ﬁxed wiring according to the national rule.

•

If the supply cord is damaged, it must be

replaced by the manufacturer, its service

agent or similarly qualiﬁed persons in order

to avoid a hazard.

•

The appliance shall be installed in accordance

with national wiring regulations.

•

The indoor unit must be installed 2,5m above

ﬂoor.

•

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.

COOL mode HEAT mode DRY mode

Room Temperature 17°C - 32°C

(62°F - 90°F)

0°C - 30°C

(32°F - 86°F)

17°C - 32°C

(62°F - 90°F)

Outdoor

Temperature

0°C - 50°C

(32°F - 122°F)

-15°C - 24°C

(5°F - 76°F)

0°C - 50°C

(32°F - 122°F)

18°C - 54°C

(For special

tropical models)

0°C - 60°C

(For special

tropical models)

-15°C - 50°C

(5°F - 122°F)

(For models with

low temp. cooling

systems.)

FOR OUTDOOR UNITS

WITH AUXILIARY

ELECTRIC HEATER

When outside

temperature is below 0°C

(32°F ), we strongly

recommend keeping the

unit plugged in at all

time to ensure smooth

ongoing performance.

-7°C - 24°C

Page 6 

Features

Default Setting

When the air conditioner restarts after a power

failure, it will default to the factory settings

(AUTO mode, AUTO fan, 24°C (76°F)). This

may cause inconsistencies on the remote

control and unit panel. Use your remote

control to update the status.

Auto-Restart (some models)

In case of power failure, the system will

immediately stop. When power returns, the

Operation light on the indoor unit will ﬂash. To

restart the unit, press the ON/OFF button on

the remote control. If the system has an auto

restart function, the unit will restart using the

same settings.

Energy Saving Tips

• DO NOT

set the unit to excessive temperature levels.

• While cooling, close the curtains to avoid direct sunlight.

• Doors and windows should be kept closed to keep cool or warm air in the room.

• DO NOT

place objects near the air inlet and outlet of the unit. This will reduce the efﬁciency of

the unit.

• Set a timer and use the built-in SLEEP/ECONOMY mode if applicable.

• If you don’t plan to use the unit for a long time, remove the batteries from the remote control.

• Clean the air ﬁlter every two weeks. A dirty ﬁlter can reduce cooling or heating efﬁciency.

• Adjust louvers properly and avoid direct airﬂow.

Louver Angle Memory Function (Optional)

Some models are designed with a louver angle

memory function. When the unit restarts after a

power failure, the angle of the horizontal louvers

will automatically return to the previous position.

The angle of the horizontal louver should not be

set too small as condensation may form and drip

into the machine. To reset the louver, press the

manual button, which will reset the horizontal

louver settings.

Refrigerant Leak Detection System

(some models)

In the event of a refrigerant leak, the LCD screen

will display “EC” and the LED indicator light will

ﬂash.

Closing curtains during heating also

helps keep the heat in

Doors and windows should be kept

closed

Functions

Page 7 

Features

Default Setting

When the air conditioner restarts after a power

failure, it will default to the factory settings

(AUTO mode, AUTO fan, 24°C (76°F)). This

may cause inconsistencies on the remote

control and unit panel. Use your remote

control to update the status.

Auto-Restart (some models)

In case of power failure, the system will

immediately stop. When power returns, the

Operation light on the indoor unit will ﬂash. To

restart the unit, press the ON/OFF button on

the remote control. If the system has an auto

restart function, the unit will restart using the

same settings.

Energy Saving Tips

• DO NOT

set the unit to excessive temperature levels.

• While cooling, close the curtains to avoid direct sunlight.

• Doors and windows should be kept closed to keep cool or warm air in the room.

• DO NOT

place objects near the air inlet and outlet of the unit. This will reduce the efﬁciency of

the unit.

• Set a timer and use the built-in SLEEP/ECONOMY mode if applicable.

• If you don’t plan to use the unit for a long time, remove the batteries from the remote control.

• Clean the air ﬁlter every two weeks. A dirty ﬁlter can reduce cooling or heating efﬁciency.

• Adjust louvers properly and avoid direct airﬂow.

Louver Angle Memory Function (Optional)

Some models are designed with a louver angle

memory function. When the unit restarts after a

power failure, the angle of the horizontal louvers

will automatically return to the previous position.

The angle of the horizontal louver should not be

set too small as condensation may form and drip

into the machine. To reset the louver, press the

manual button, which will reset the horizontal

louver settings.

Refrigerant Leak Detection System

(some models)

In the event of a refrigerant leak, the LCD screen

will display “EC” and the LED indicator light will

ﬂash.

Closing curtains during heating also

helps keep the heat in

Doors and windows should be kept

closed

Functions

Manual Operations 3

This display panel on the indoor unit can be used to operate the unit in case the remote control has

been misplaced or is out of batteries.

Fig. 3.1

•

MANUAL button: This button selects the mode in the following order: AUTO, FORCED COOL, OFF.

• FORCED COOL mode: In FORCED COOL mode, the Operation light ﬂashes. The system will then

turn to AUTO after it has cooled with a high wind speed for 30 minutes. The remote control will

be disabled during this operation.

• OFF mode: When the panel is turned OFF, the unit turns oﬀ and the remote control is re-enabled.

Infrared receiver

Timer indicator Alarm indicator

PRE-DEF

(pre-heating/defrost)

indicator

Manual button

Operation indicator

LED display

Page 8 

1. If the unit you purchased is a rear ventilated

one, take oﬀ the ﬁlter in the directions

indicated by the arrows in the following

diagram.

Fig. 4.1

Fig. 4.2

2. If the unit you purchased is a descensional

ventilated model, take oﬀ the ﬁlter in the

directions indicated by the arrows in the

following diagram.

Safety Precautions

• Contact an authorized service technician for

repair or maintenance. Improper repair and

maintenance may cause water leakage,

electrical shock, or ﬁre, and may void your

warranty.

•

DO NOT

substitute a blown fuse with a

higher or lower amperage rating fuse, as this

may cause circuit damage or an electrical ﬁre.

• Make sure the drain hose is set up according

to the instructions. Failure to do so could

cause leakage and result in personal property

damage, ﬁre and electric shock.

• Make sure that all wires are connected

properly. Failure to connect wires according

to instructions can result in electrical shock

or ﬁre.

Unit Maintenance

BEFORE CLEANING OR

MAINTENANCE

• Always turn oﬀ your air conditioning system

and disconnect the power supply before

cleaning or maintenance.

•

DO NOT

use chemicals or chemically treated

cloths to clean the unit.

•

DO NOT

use benzene, paint thinner,

polishing powder or other solvents to clean

the unit. They can cause the plastic surface

to crack or deform.

•

DO NOT

wash the unit under running water.

Doing so creates an electrical hazard.

•

DO NOT

use water hotter than 40°C (104°F)

to clean the front panel. This can cause the

panel to become deformed or discolored.

• Clean the unit using a damp, lint-free cloth

and neutral detergent. Dry the unit with a

dry, lint-free cloth.

How To Clean The Air Filter

The ﬁlter prevents dust and other particles from

entering the indoor unit. Dust buildup can reduce

the efﬁciency of the air conditioner. For optimum

efﬁciency, clean the air ﬁlter every two weeks or

more frequently if you live in a dusty area.

Replace the ﬁlter with a new one if it’s heavily

clogged and cannot be cleaned.

WARNING: DO NOT REMOVE OR

CLEAN THE FILTER BY YOURSELF

Removing and cleaning the ﬁlter can be

dangerous. Removal and maintenance must be

performed by a certiﬁed technician.

NOTE: In households with animals, you will

have to periodically wipe down the grille to

prevent animal hair blocking airﬂow.

Care And Maintenance 4

Page 9 

1. If the unit you purchased is a rear ventilated

one, take oﬀ the ﬁlter in the directions

indicated by the arrows in the following

diagram.

Fig. 4.1

Fig. 4.2

2. If the unit you purchased is a descensional

ventilated model, take oﬀ the ﬁlter in the

directions indicated by the arrows in the

following diagram.

Safety Precautions

• Contact an authorized service technician for

repair or maintenance. Improper repair and

maintenance may cause water leakage,

electrical shock, or ﬁre, and may void your

warranty.

•

DO NOT

substitute a blown fuse with a

higher or lower amperage rating fuse, as this

may cause circuit damage or an electrical ﬁre.

• Make sure the drain hose is set up according

to the instructions. Failure to do so could

cause leakage and result in personal property

damage, ﬁre and electric shock.

• Make sure that all wires are connected

properly. Failure to connect wires according

to instructions can result in electrical shock

or ﬁre.

Unit Maintenance

BEFORE CLEANING OR

MAINTENANCE

• Always turn oﬀ your air conditioning system

and disconnect the power supply before

cleaning or maintenance.

•

DO NOT

use chemicals or chemically treated

cloths to clean the unit.

•

DO NOT

use benzene, paint thinner,

polishing powder or other solvents to clean

the unit. They can cause the plastic surface

to crack or deform.

•

DO NOT

wash the unit under running water.

Doing so creates an electrical hazard.

•

DO NOT

use water hotter than 40°C (104°F)

to clean the front panel. This can cause the

panel to become deformed or discolored.

• Clean the unit using a damp, lint-free cloth

and neutral detergent. Dry the unit with a

dry, lint-free cloth.

How To Clean The Air Filter

The ﬁlter prevents dust and other particles from

entering the indoor unit. Dust buildup can reduce

the efﬁciency of the air conditioner. For optimum

efﬁciency, clean the air ﬁlter every two weeks or

more frequently if you live in a dusty area.

Replace the ﬁlter with a new one if it’s heavily

clogged and cannot be cleaned.

WARNING: DO NOT REMOVE OR

CLEAN THE FILTER BY YOURSELF

Removing and cleaning the ﬁlter can be

dangerous. Removal and maintenance must be

performed by a certiﬁed technician.

NOTE: In households with animals, you will

have to periodically wipe down the grille to

prevent animal hair blocking airﬂow.

Care And Maintenance 4

3. Remove the air ﬁlter.

4. Clean the air ﬁlter by vacuuming the surface

or washing it in warm water with mild

detergent.

A. If using a vacuum cleaner, the inlet side

should face the vacuum.

Fig. 4.3

B. If using water, the inlet side should face

down and away from the water stream.

Fig. 4.4

5. Rinse the ﬁlter with clean water and allow it

to air-dry.

DO NOT

let the ﬁlter dry in direct

sunlight.

6. Reinstall the ﬁlter.

Repairing Refrigerant Leaks

WARNING

• If the refrigerant leaks, turn oﬀ the air

conditioner and any combustible heating

devices, ventilate the room and call your

dealer immediately. Refrigerant is both toxic

and ﬂammable.

DO NOT

use the air

conditioner until the leak is repaired.

• When the air conditioner is installed in a

small room, measures must be taken to

prevent the refrigerant concentration from

exceeding the safety limit in the event of

refrigerant leakage. Concentrated

refrigerant causes a severe health and safety

threat.

Refrigerant Leak Detection System

(some models)

• In the event of a refrigerant leak, the LCD

screen will display “EC” and the LED indicator

light will ﬂash.

Preparation For Periods Of Non-Use

Maintenance after Extended Non-Use

1. Remove any obstacles blocking the vents of

both the indoor and outdoor units.

2. Clean the air ﬁlter and the front grille of the

indoor unit. Reinstall the clean, dry air ﬁlter in

its original position.

3. Turn on the main power switch at least 12

hours prior to operating the unit.

Storing the Unit While Not In Use

1. Run the appliance on FAN mode for 12 hours

in a warm room to dry it and prevent mold.

2. Turn oﬀ the appliance and unplug it.

3. Clean the air ﬁlter according to the instructions

in the previous section. Reinstall the clean, dry

ﬁlter before storing.

4. Remove the batteries from the remote control.

Page 10 

CAUTIONS

If one of the following conditions occurs, switch oﬀ the power supply immediately and contact

your dealer for further assistance.

• The operation light continues to ﬂash rapidly after the unit has been restarted.

• The remote control buttons do not work.

• The unit continually trips fuses or circuit breakers.

• A foreign object or water enters the air conditioner.

• Other abnormal situations.

Common Problems

The following symptoms are not a malfunction and in most situations will not require repairs.

Problem Possible Causes

Unit does not

turn on when

pressing ON/

OFF button

The unit has a 3-minute protection feature that prevents the unit from

overloading. The unit cannot be restarted within three minutes of being

turned oﬀ.

Cooling and Heating Models: If the Operation light and PRE-DEF (Pre-heating/

Defrost) indicators are lit up, the outdoor temperature is too cold and the unit’s

anti-cold wind is activated in order to defrost the unit.

In Cooling-only Models: If the “Fan Only” indicator is lit up, the outdoor

temperature is too cold and the unit’s anti-freeze protection is activated in

order to defrost the unit.

The unit changes

from COOL mode

to FAN mode

The unit changes its setting to prevent frost from forming on the unit. Once

the temperature increases, the unit will start operating again.

The set temperature has been reached, at which point the unit turns oﬀ the

compressor. The unit will resume operating when the temperature ﬂuctuates

again.

The indoor unit

emits white mist

In humid regions, a large temperature diﬀerence between the room’s air and

the conditioned air can cause white mist.

Both the indoor

and outdoor units

emit white mist

When the unit restarts in HEAT mode after defrosting, white mist may be

emitted due to moisture generated from the defrosting process.

The indoor unit

makes noises

A squeaking sound is heard when the system is OFF or in COOL mode. The

noise is also heard when the drain pump (optional) is in operation.

A squeaking sound may occur after running the unit in HEAT mode due to

expansion and contraction of the unit’s plastic parts.

Both the indoor

unit and outdoor

unit make noises

A low hissing sound may occur during operation. This is normal and is caused

by refrigerant gas ﬂowing through both the indoor and outdoor units.

A low hissing sound may be heard when the system starts, has just stopped

running or is defrosting. This noise is normal and is caused by the refrigerant

gas stopping or changing direction.

The outdoor unit

makes noises

The unit will make diﬀerent sounds based on its current operating mode.

Troubleshooting 5

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