ActronAir ECOFLEX MINI VRF R-32 Series User manual

ECOFLEX MINI VRF R-32 SERIES
Four-way Compact Cassette
Owner’s Manual
Model Numbers
MCC-015CS
MCC-022CS
MCC-028CS
MCC-036CS
MCC-045CS
MCC-056CS
MCC-063CS
CAUTION:
The system is charged with flammable
refrigerant, safety checks are necessary to
ensure that the risk of ignition is minimised.

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Owner’s Manual ECOFLEX MINI VRF R-32 SERIES
Table of Contents
. Preface ......................................................................................................................................
. Safety Warning .........................................................................................................................
. Warning Signs 
. Safety Precautions 
. Electric Safety Requirements 
. Appendix 
. Operation ...............................................................................................................................
. Operation Precautions 
. Optimum Operation 
. Symptoms That Are Not Faults ................................................................................................
. Display panel ...........................................................................................................................
. Cleaning and Maintenance ......................................................................................................
. Safety Warning 
. Cleaning the Air Filter 
. Cleaning Air Outlets and Exteriors Panels 
. Maintenance 
. Maintenance Frequency Checklist ...........................................................................................

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Owner’s Manual ECOFLEX MINI VRF R-32 SERIES
. Preface
Dear users,
Thank you for purchasing and using our product. Please read this manual carefully before you install, use, maintain or
troubleshoot this product so that you can familiarize yourself with the product and use it correctly.
For Outdoor Units or other Indoor Units, please refer to the applicable installation & owner’s manuals provided with them.
For detailed operation of auxiliary control devices, such as wired, remote and centralized controllers, please refer to their
instructions.
• To ensure the correct installation and operation of the product, the following instructions are provided: To ensure the
correct and safe operation of the product, please strictly follow the requirements listed in this manual.
• All figures and contents in this manual are for reference only. Due to continuing product improvement, the
specifications are subject to change without notice.
• Regular cleaning and maintenance of the product are required for intended performance and long service life. Each
year before using the air conditioner, please contact your local dealer, and we will assign professionals to provide paid
services of cleaning, maintenance, and inspection.
• Please retain this manual for future reference.

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Owner’s Manual ECOFLEX MINI VRF R-32 SERIES
. Safety Warning
Please thoroughly read and ensure that you fully understand the safety precautions (including the signs and symbols) in this
manual, and follow relevant instructions during use to prevent damage to health or property.
WARNING This symbol shows that this appliance used a flammable refrigerant. If the refrigerant is leaked
and exposed to an external ignition source, there is a risk of fire.
CAUTION This symbol shows that the operation manual should be read carefully.
CAUTION This symbol shows that a service personnel should be handling this equipment with reference
to the installation manual.
CAUTION This symbol shows that information is available such as the operating manual or installation
manual.
01.01. Warning Signs
Different marks are used to indicate the levels of hazard severity. Please follow the instructions and ensure safe operation:
DANGER Failure to observe the warning will result in severe personal injury or death.
WARNING Failure to observe the warning could result in severe personal injury or death, property
damage, or electrical or fire hazards.
CAUTION Failure to observe the warning could result in minor personal injury, product or property
damage, or other unsafe situations.
NOTE Useful operation and maintenance information.
Warning Contents
02 Safety Warning
2
2
OFF
Indoor unit
2.5m
Air conditioner installation must comply with local standards and electrical codes, and
relevant instructions in this manual.
Do not use any liquid cleanser, liquefied cleanser, or corrosive cleanser to wipe this unit or
spray water or other liquids on the unit. Otherwise, the plastic parts of the unit will become
damaged and an electrical shock may occur. Disconnect the main power switch before
cleaning and maintenance to avoid accidents.
Ask a professional to remove and reinstall the air conditioner.
Ask a professional for maintenance and repair assistance.
This air conditioner is classified as an "appliance which is not accessible to the general
public".
The IDU shall be placed at a height not accessible to children, at least 2.5m above the
ground.
[ Warning ]
No Open Fire
Warning contents
Prohibition signs
Ensure Proper
Grounding
No Flammable
Materials
No Acid or
Alkali Materials
No Strong Current
Professional Only
During thunderstorms, disconnect the main power switch. Otherwise, lightning may
damage the unit.
In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect
the main power switch immediately, open windows to allow ventilation, keep away from the
leakage point, and contact your local dealer or technical support to request a professional
repair.
[ Danger ]
Safety Precautions
[ Caution ]
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.
The units are partial unit air conditioners, complying with partial unit requirements of this International
Standard, and must only be connected to other units that have been confirmed as complying to corresponding
partial unit requirements of this International Standard.
Prohibition signs
02 Safety Warning
2
2
OFF
Indoor unit
2.5m
Air conditioner installation must comply with local standards and electrical codes, and
relevant instructions in this manual.
Do not use any liquid cleanser, liquefied cleanser, or corrosive cleanser to wipe this unit or
spray water or other liquids on the unit. Otherwise, the plastic parts of the unit will become
damaged and an electrical shock may occur. Disconnect the main power switch before
cleaning and maintenance to avoid accidents.
Ask a professional to remove and reinstall the air conditioner.
Ask a professional for maintenance and repair assistance.
This air conditioner is classified as an "appliance which is not accessible to the general
public".
The IDU shall be placed at a height not accessible to children, at least 2.5m above the
ground.
[ Warning ]
No Open Fire
Warning contents
Prohibition signs
Ensure Proper
Grounding
No Flammable
Materials
No Acid or
Alkali Materials
No Strong Current
Professional Only
During thunderstorms, disconnect the main power switch. Otherwise, lightning may
damage the unit.
In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect
the main power switch immediately, open windows to allow ventilation, keep away from the
leakage point, and contact your local dealer or technical support to request a professional
repair.
[ Danger ]
Safety Precautions
[ Caution ]
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.
The units are partial unit air conditioners, complying with partial unit requirements of this International
Standard, and must only be connected to other units that have been confirmed as complying to corresponding
partial unit requirements of this International Standard.

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01.02. Safety Precautions
DANGER
02 Safety Warning
2
2
OFF
Indoor unit
2.5m
Air conditioner installation must comply with local standards and electrical codes, and
relevant instructions in this manual.
Do not use any liquid cleanser, liquefied cleanser, or corrosive cleanser to wipe this unit or
spray water or other liquids on the unit. Otherwise, the plastic parts of the unit will become
damaged and an electrical shock may occur. Disconnect the main power switch before
cleaning and maintenance to avoid accidents.
Ask a professional to remove and reinstall the air conditioner.
Ask a professional for maintenance and repair assistance.
This air conditioner is classified as an "appliance which is not accessible to the general
public".
The IDU shall be placed at a height not accessible to children, at least 2.5m above the
ground.
[ Warning ]
No Open Fire
Warning contents
Prohibition signs
Ensure Proper
Grounding
No Flammable
Materials
No Acid or
Alkali Materials
No Strong Current
Professional Only
During thunderstorms, disconnect the main power switch. Otherwise, lightning may
damage the unit.
In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect
the main power switch immediately, open windows to allow ventilation, keep away from the
leakage point, and contact your local dealer or technical support to request a professional
repair.
[ Danger ]
Safety Precautions
[ Caution ]
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.
The units are partial unit air conditioners, complying with partial unit requirements of this International
Standard, and must only be connected to other units that have been confirmed as complying to corresponding
partial unit requirements of this International Standard.
During thunderstorms, disconnect the main power switch. Otherwise, lightning may damage the unit.
In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect the main
power switch immediately, open windows to allow ventilation, keep away from the leakage point, and
contact your local dealer or technical support to request a professional repair.
WARNING
Air conditioner installation must comply with local standards and electrical codes, and relevant
instructions in this manual.
Do not use any liquid cleanser, liquefied cleanser, or corrosive cleanser to wipe this unit or spray
water or other liquids on the unit. Otherwise, the plastic parts of the unit will become damaged and
an electrical shock may occur. Disconnect the main power switch before cleaning and maintenance
to avoid accidents.
Ask a professional to remove and reinstall the air conditioner. Ask a professional for maintenance and
repair assistance.
This air conditioner is classified as an “appliance which is not accessible to the general public”.
The Indoor Unit shall be placed at a height not accessible to children, at least 2.3m above the ground.
02 Safety Warning
2
2
OFF
Indoor unit
2.5m
Air conditioner installation must comply with local standards and electrical codes, and
relevant instructions in this manual.
Do not use any liquid cleanser, liquefied cleanser, or corrosive cleanser to wipe this unit or
spray water or other liquids on the unit. Otherwise, the plastic parts of the unit will become
damaged and an electrical shock may occur. Disconnect the main power switch before
cleaning and maintenance to avoid accidents.
Ask a professional to remove and reinstall the air conditioner.
Ask a professional for maintenance and repair assistance.
This air conditioner is classified as an "appliance which is not accessible to the general
public".
The IDU shall be placed at a height not accessible to children, at least 2.5m above the
ground.
[ Warning ]
No Open Fire
Warning contents
Prohibition signs
Ensure Proper
Grounding
No Flammable
Materials
No Acid or
Alkali Materials
No Strong Current
Professional Only
During thunderstorms, disconnect the main power switch. Otherwise, lightning may
damage the unit.
In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect
the main power switch immediately, open windows to allow ventilation, keep away from the
leakage point, and contact your local dealer or technical support to request a professional
repair.
[ Danger ]
Safety Precautions
[ Caution ]
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.
The units are partial unit air conditioners, complying with partial unit requirements of this International
Standard, and must only be connected to other units that have been confirmed as complying to corresponding
partial unit requirements of this International Standard.
CAUTION
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.
The units are partial unit air conditioners, complying with partial unit requirements of this International Standard, and must
only be connected to other units that have been confirmed as complying to corresponding partial unit requirements of
this International Standard.

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01.03. Electric Safety Requirements
WARNING
• The air conditioner shall be installed according to the local wiring specifications. Wiring work
must be completed by qualified electricians.
• All wiring work must comply with electrical safety specifications.
• The air conditioner must be well grounded. Specifically, the main switch of the air conditioner
must have a reliable grounding cable.
• Before contacting wiring devices, cut off all the power supplies.
• The user MAY NOT disassemble or repair the air conditioner. Doing so can be dangerous. In the event of a fault,
immediately cut off the power and contact your local dealer or technical support.
• A separate power supply that meets the rated parameter values must be provided for the air conditioner.
• The fixed wiring to which the air conditioner is connected must be equipped with a power cut-off
device that meets the wiring requirements.
• To avoid danger, a damaged power cable must be replaced by professionals from the
maintenance department or a similar department of the manufacturer.
• The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent
protection.
• The specifications of the fuse are printed on the circuit board.
• NOTE: For the units with R-32 refrigerant , only the blast-proof ceramic fuse can be used.
CAUTION
Always ground the main power switch.
Do not use a damaged power cable and replace it if it is damaged.
When the air conditioner is used for the first time or is in a power-off state for a long time, it needs to be
connected to the power supply and warmed up for at least 12 hours before use.

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01.04. Appendix
WARNING
The following applies to R-32 refrigerant systems.
• Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the
risk of ignition is minimized.
• For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on
the system.
• Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being
present while the work is being performed.
• All maintenance staff and others working in the local area shall be instructed on the nature of work being carried
out. Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure that the
conditions within the area have been made safe by control of flammable material.
• Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. non-sparking,
adequately sealed or intrinsically safe.
• If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire
extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the
charging area.
• No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains
or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of
fire or explosion.
• All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of
installation, repairing, removing and disposal, during which flammable refrigerant can possibly be released to the
surrounding space.
• Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable
hazards or ignition risks. “No Smoking” signs shall be displayed.
• Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting
any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation
should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
• Where electrical components are being changed, they shall be fit for the purpose and to the correct specification.
At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt consult the
manufacturer’s technical department for assistance.
• The following checks shall be applied to installations using flammable refrigerants:
1. the charge size is in accordance with the room size within which the refrigerant containing parts are installed;
2. the ventilation machinery and outlets are operating adequately and are not obstructed;
3. if an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of
refrigerant;
4. marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be
corrected;
5. refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any
substance which may corrode refrigerant containing components, unless the components are constructed of
materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
• Repair and maintenance to electrical components shall include initial safety checks and component inspection
procedures.

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Owner’s Manual ECOFLEX MINI VRF R-32 SERIES
• If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is
satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an
adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are
advised.
• Initial safety checks shall include:
1. that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
2. that no live electrical components and wiring are exposed whiule charging, recovering or purging the system;
3. that there is continuity of earth bonding.
• During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked
upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment
during servicing, then a permanently operating form of leak detection shall be located at the most critical point to
warn of a potentially hazardous situation.
• Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is
not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number
of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.
• Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the
ingress of flammable atmospheres.
• Replacement parts shall be in accordance with the manufacturer’s specifications.
• Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed
the permissible voltage and current permitted for the equipment in use.
• Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable
atmosphere. The test apparatus shall be at the correct rating.
• Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of
refrigerant in the atmosphere from a leak.
• Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other
adverse environmental effects. The check shall also take into account the effects of ageing or continual vibration from
sources such as compressors or fans.
• When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall
be used. However, it is important that best practice is followed.
• Since flammability is a consideration. The following procedure shall be adhered to:
• remove refrigerant;
• purge the circuit with inert gas;
• evacuate;
• purge again with inert gas;
• open the circuit by cutting or brazing.
• The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be “flushed” with OFN
to render the unit safe. This process may need to be repeated several times. Compressed air or oxygen shall not be
used for this task.
• Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working
pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum.
• This process shall be repeated until no refrigerant is within the system. When the final OFN charge is used, the system
shall be vented down to atmospheric pressure to enable work to take place.
• This operation is absolutely vital if brazing operations on the pipe-work are to take place.
• Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available.
• Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines
shall be as short as possible to minimise the amount of refrigerant contained in them.
• Prior to recharging the system it shall be pressure tested with OFN.

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• DD.12 Decommissioning:
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and
all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried
out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant. It
is essential that electrical power is available before the task is commenced.
1. Become familiar with the equipment and its operation.
2. Isolate system electrically.
3. Before attempting the procedure ensure that:
•mechanical handling equipment is available, if required, for handling refrigerant cylinders;
•all personal protective equipment is available and being used correctly;
•the recovery process is supervised at all times by a competent person;
•recovery equipment and cylinders conform to the appropriate standards.
4. Pump down refrigerant system, if possible.
5. If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
6. Make sure that cylinder is situated on the scales before recovery takes place.
7. Start the recovery machine and operate in accordance with manufacturer’s instructions.
8. Do not overfill cylinders. (No more than 80 % volume liquid charge).
9. Do not exceed the maximum working pressure of the cylinder, even temporarily.
10.When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the
equipment are removed from site promptly and all isolation valves on the equipment are closed off.
11. Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and
checked.
• Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall
be dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable
refrigerant.
• When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice
that all refrigerants are removed safely.
• When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed.
Ensure that the correct number of cylinders for holding the total system charge are available. All cylinders to be used
are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery
of refrigerant). Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working
order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
• The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at
hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighing scales
shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in
good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly
maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant
release. Consult manufacturer if in doubt.
• The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the
relevant Waste Transfer Note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.
• If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level
to make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be
carried out prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be
employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.
• Warning: disconnect the appliance from its power source during service and when replacing parts.
• These units are partial unit air conditioners, complying with partial unit requirements of this International Standard,
and must only be connected to other units that have been confirmed as complying to corresponding partial unit
requirements of this International Standard.

10 Owner’s Manual ECOFLEX MINI VRF R-32 SERIES - 4 WAY COMPACT CASSETTE
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Owner’s Manual ECOFLEX MINI VRF R-32 SERIES
. Operation
02.01. Operation Precautions
WARNING
• If the unit will be not used for a long time, disconnect the main power switch. Otherwise, an accident may occur.
• The installation height of the air conditioner shall be at least 2.3m above the ground to avoid the following risks:
1. Touching of moving or live parts, such as fans, motors, or louvers, by a non professional.
2. Running parts may cause harm to you or transmission assemblies may become damaged.
• Getting too close to the air conditioner may reduce the level of comfort.
• When the product is used with a burning appliance, the room must be ventilated regularly.
Otherwise, it may cause an insufficient oxygen supply.
• Do not let children play with the air conditioner. Otherwise, an accident may occur.
• Do not expose the Indoor Units or controller to moisture or water as this may cause short
circuiting or fire.
• Do not place any appliance that uses an open flame in the direct air supply of the air conditioner as it could
interfere with the combustion of the appliance.
• Do not use or store flammable gases or liquids such as natural gas, hair spray, paint or
gasoline near the air conditioner. Otherwise, a fire may occur.
• To avoid causing harm, do not place animals or plants directly in front of the air conditioner’s
air supply.
• In the event of abnormal conditions such as abnormal noise, smell, smoke, temperature
rise, and electric leakage, please cut off the power immediately, and then contact your
local dealer or air conditioner customer service center. Do not repair the air conditioner by
yourself.
• Do not place flammable sprayers near the air conditioner or spray it directly at the air
conditioner. Otherwise, a fire may occur.
• Do not place a container of water on the air conditioner. If immersed in water, the air
conditioner’s electrical insulation will weaken, resulting in electrical shock.
• After long-term use, confirm whether the installation platform has become worn. If it is worn,
the unit could fall, causing injury.
• Do not operate the switch with wet hands, as this may result in electric shock.
• When servicing the air conditioner, be sure to turn off the air conditioner and cut off the power supply.
Otherwise, the high-speed operation of the internal fan will cause injury.
• The air conditioner cannot be used to preserve food, animals and plants, precision
instruments and works of art, etc.; otherwise, quality degradation could occur.
• Do not place valuables under the air conditioner. Air conditioner condensation problems
may damage the valuables.
• When the air conditioner needs to be moved and re-installed, please entrust the local dealer or a professional
technician to operate it.

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CAUTION
• To use the unit normally, please follow the “Operation” section in this manual. Otherwise, the
internal protection may be triggered, the unit may begin to drip, or the unit’s cooling and heating
effects may be impacted.
• The room temperature should be set properly, especially when there are elderly, children, or
patients in the room.
• Lightning or the starting and stopping of large electrical equipment in nearby factories may cause
misoperation of the air conditioner. Please turn off the main power switch for a few seconds, and
then restart the air conditioner.
• To avoid accidental resetting of the thermal circuit breaker, the air conditioner cannot be powered
by an external switching device such as a timer or connected to a circuit that is turned on and off by
a common component timer.
• Check whether the air filter is installed properly. Confirm that the inlet and outlet ports of the
Indoor Unit/Outdoor Unit are not blocked.
• If the air conditioner will not be used for a long time, please clean the air filter before you start the
air conditioner. Otherwise, dust and mold on the filter could contaminate the air or produce an
unpleasant odor. For more details, please refer to the section “Cleaning and Maintenance”.
08 Operation
02.02. Optimum Operation
As cold air sinks and hot air rises, to improve the cooling and heating effect, it is recommended to have an angle of 30° to 65°
between the louver and ceiling during cooling and heating.
08 Operation
CAUTION
Long-term air output at an angle of 40 ° may cause condensation on the surface of the louver. It is recommended to turn
on the anti-condensation function through the wired controller to alleviate this situation.

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Operating Range
To maintain good performance, operate the air conditioner under the following temperature conditions:
Cooling
Indoor Temperature 16~32 °C
Indoor Humidity
≤80%
(When the humidity exceeds 80%, long-time operation of the Indoor Unit may
cause dew condensation on the surface of the Indoor Unit or generate mist-like
cold air from the air outlet.)
Heating Indoor Temperature 15~30°C
CAUTION
The Indoor Unit operates stably within the temperature range given in the table above. If it exceeds this normal operating
range, the Indoor Unit may stop running.
. Symptoms That Are Not Faults
Normal Protection of the Air Conditioner
During operation, the following phenomena are normal and do not require maintenance.
Protection
When the power switch is on, if you start the system right after it is stopped, it is normal that
the Outdoor Unit does not operate for about four minutes as frequent compressor start/stop
is not supported.
Anti-cold air protection
(Heat pump type)
In heating mode (including heating in automatic mode), when the indoor heat exchanger
does not reach a certain temperature, the indoor fan temporarily shuts off, or runs in Low
mode until the heat exchanger heats up to prevent the blowing of cold air.
Defrosting
(Heat pump type)
When the outdoor temperature is low and the humidity is high, frost may build up on the
Outdoor Units heat exchanger, which may reduce the heating capacity of the air conditioner.
In this case, the air conditioner will stop heating, enter automatic defrosting mode, and
return to heating mode after defrosting has been completed.
During the defrosting, the outdoor fan stops running and the indoor fan runs using the anti-
cold air protection function.
The defrosting operation time varies depending on the outdoor temperature and the degree
of frosting. It generally takes 2 to 10 minutes.
During the defrosting process, the Outdoor Unit may emit steam due to the rapid defrosting,
which is normal.
Anti Condensation
When the Indoor Unit detects high humidity, the air conditioner will adjust the louver angle
and the fan speed to prevent condensation and avoid dripping. (If a third-party panel is
selected, this function is not available.)

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Normal Phenomena that Are Not Air Conditioner Faults
The following phenomena are normal during operation of the air conditioner. They can be solved according to the
instructions below or do not need to be solved.
The Indoor Unit emits
white mist
1. In an environment where the indoor relative humidity is too high, when the Indoor Unit
runs in cooling mode, white mist may appear due to the humidity and the temperature
difference between the air inlet and outlet.
2. When the air conditioner is switched to heating mode after defrosting, the Indoor Unit
discharges the moisture generated from defrosting as steam.
The Indoor Unit blows
dust
When the air conditioner has not been used for a long time or is used for the first time, the
air filter should be cleaned. Otherwise, dust that has entered the Indoor Unit will be blown
out.
The Indoor Unit emits
odor
The Indoor Unit absorbs the odors of rooms, furniture or cigarettes, etc., and disperses the
odors during operation. It is advised to have the air conditioner cleaned and maintained
regularly by professional technicians.
Water drips on the air
conditioner surface
When the indoor relative humidity is high, it is normal for condensation or slight water
blowing to occur on the surface of the air conditioner.
“Self-cleaning” sound of
icing
During self-cleaning, there may be a slight clicking sound for about 10 minutes, indicating
that the Indoor Unit is freezing, which is normal.
The air conditioner makes
low noise
1. When the air conditioner is in “Auto”, “Cool”, “Dry”, and “Heat” modes, it may emit a
low continuous “hissing” sound, which is caused by the refrigerant flowing between the
Indoor Unit and the Outdoor Unit.
2. A “hissing” sound may be heard for a short time after the air conditioner stops operation
or during “defrosting”, which is caused when the refrigerant stops flowing or changes its
flow.
3. When the air conditioner is in Cool mode or Dry mode, a small and continuous rustling
sound can be heard, which is caused by the drain pump.
4. When the air conditioner starts or stops running, you may hear a squeaking sound which
is produced by the expansion or shrinkage of parts or surrounding aesthetic materials
due to temperature change. The sound will disappear when the air conditioner is
running normally.
Switching from cooling/
heating (not available for
cooling only units) mode
to fan only mode
When the Indoor Unit reaches the set temperature, the air conditioner compressor
automatically stops operation and switches to the fan only mode. When the room
temperature rises (in cooling mode) or falls (in heating mode) to a certain level, the
compressor is restarted and cooling or heating operation is resumed.
In winter, the outdoor
temperature is low, and
heating effects may be
decreased
1. During the heating operation of the heat pump type air conditioner, the air conditioner
absorbs heat from the outdoor air and releases it to heat the indoor air. This is the heat
pump heating principle of the air conditioner.
2. When the heat pump runs in heating mode, the Outdoor Unit blows out cold air, causing
the outdoor temperature to drop. When the outdoor temperature is extremely low, the
heating capability of the air conditioner drops gradually. You are advised to use other
heating devices for heating.
No heating or cooling
options
All Indoor Units in the same air conditioning system can only operate in the same mode, for
example, cooling, heating, or others. Conflict may occur is Indoor Units are set to different
modes. Only the Indoor Unit that is first started up can determine the operating mode, and
those started after it can only follow the operating mode of the first Indoor Unit. To change
the operating mode, you need to turn off all the Indoor Units. The operating mode of all
Indoor Units must be the same.

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. Display panel
Display functions:
1. In Standby mode, the main interface displays “---”.
2. When starting up in Cooling or Heating mode, the main interface displays the set temperature. In Fan mode, the
main interface displays the indoor temperature. In Dry mode, the main interface displays the set temperature, and
when the humidity is set, the set humidity value is displayed on the wired controller.
3. The light display on the main interface can be turned on or off through the light button on the remote controller.
4. When the system fails or runs in a special mode, the main interface displays the error code or the special mode
running code. For details, see the section “Error Codes and Meanings”.
CAUTION
Some display functions are available only for certain Indoor Unit and outdoor Unit models, wired controllers, and display
boxes. For more information, please consult your local dealer or technical support.
. Cleaning and Maintenance
05.01. Safety Warning
WARNING
For safety reasons, always turn off the air conditioner and turn off the power before cleaning the air conditioner.
Do not disassemble or repair the air conditioner by yourself; otherwise, it may cause fire or other hazards.
Only professional service personnel can carry out the maintenance.
Do not use flammable or explosive materials (such as hair styling agents or pesticides) near the product.
Do not use organic solvents such as paint thinner to clean this product; otherwise, it may cause cracks, electric shock
or fire.
Only qualified dealers and professionally qualified electricians can install the optional accessories.
Be sure to use the optional accessories specified by our company.
Improper installation by yourself may result in water leakage, electric shock or fire.
Do not wash the air conditioner with water; otherwise, it may cause an electric shock.
Use a stable standing platform.

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05.02. Cleaning the Air Filter
CAUTION
• Air filters are optional.
• Air filters can be used to remove dust or other particles from the air, and if clogged, the effectiveness of the air
conditioner will be greatly reduced.
• Therefore, be sure to clean the air filter frequently when using it for an extended period.
• For the Indoor Unit with constant speed mode, if it is installed in a place with a lot of dust, it is recommended that
you clean the filter once a month.
• For Indoor Units with a constant air flow mode, clean the filter when you receive the reminder of the wired
controller.
• If excess dirt makes the filter difficult to clean, replace the filter.
• Do not remove the air filter unless it is being cleaned; otherwise, it may cause malfunction.
• If the air conditioner is used without an air filter, the accumulation of dust in the air conditioner will often cause
alfunctions due to the failure to remove dust from the indoor air.
Procedure:
1. Remove the air inlet grille.
Press the grille clamp with two fingers at the same time, and pull out the air inlet grille in a downward direction.
Flip the grille clamp to
the center.
2. Remove the filter.
NOTE
Only professionals can change and disassemble the filter. Any improper operations may cause electric shock or
injuries due to touching rotating parts.
3. Clean the filter.
Clean the filter with a vacuum cleaner, with the air
inlet side of the filter facing upwards.
Clean the filter with clean water (except for the
activated carbon module), with the air inlet side
of the filter facing downwards.

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NOTE
• Do not dry the filter in direct sunlight or fire to avoid deformation of the filter.
• If the filter is heavily soiled, use a soft brush and neutral detergent to clean it, then shake off the water and
dry it in a cool place.
• Non-professionals should not disassemble, replace or repair the filter.
4. Reinstall the filter.
5. Reinstall and close the air inlet grille by following steps 1 and 2 above in reverse.
05.03. Cleaning Air Outlets and Exteriors Panels
1. Wipe the air outlet and panel with a dry cloth.
Neutral
Detergent
2. If a stain is hard to remove, clean it with clean water or neutral detergent.
Neutral
Detergent
CAUTION
• Do not use gasoline, benzene, volatile agents, decontamination powder or liquid insecticides. Otherwise, the
air outlet or panel may become discolored or deformed.
• Do not expose the inside of the Indoor Unit to moisture, as it may result in electric shock or fire.
• When cleaning the louver with water, do not scrub it violently.
• If the air conditioner is used without an air filter, the accumulation of dust in the air conditioner will often
cause malfunctions due to the failure to remove dust from the indoor air.

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05.04. Maintenance
1. During in-depth maintenance, the air conditioner should be cleaned and maintained by professional technicians
every 2 to 3 years.
2. Clean the filter regularly.
When operating in a dusty environment, the air flow and capacity of the filter will decrease. The filter may even
become blocked, and the air conditioner performance and indoor air compromised.
3. Preheat the unit in advance.
When the heating season comes, power on the outdoor Unit master unit for preheating more than 4 hours before
use. The preheating time depends on the weather temperature. This can make the air conditioner operate more
stably and help the refrigeration oil in the air conditioner compressor to maintain the best lubrication state, which
can prolong the service life of the compressor.
4. Complete the following steps before the air conditioner is put out of use for a long period:
•If the air conditioner is not in use for a long time due to seasonal changes, keep the unit running for 4-5 hours in
fan mode until the unit becomes completely dry. Otherwise, it may grow mold indoors and have negative health
effects.
•When not in use for a long time, power off or unplug the power plug to reduce standby power consumption,and
wipe the wireless remote controller with a clean soft dry cloth and remove the battery.
•Turn on the power switch 12 hours before using the air conditioner again. In addition, in seasons when air
conditioners are frequently used, keep the power switch on. Otherwise, failures may occur.
CAUTION
• Before the air conditioner is idle for a long time, the internal components of the outdoor Units should be
checked and cleaned regularly. For more details, please contact the customer service or special technical
service department.
• Check the return air inlet and outlet of the outdoor Unit and Indoor Unit after long periods of use to see if
they are blocked; if an inlet/outlet is blocked, clean it immediately.

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. Maintenance Frequency Checklist
Regular servicing of equipment by a qualified technician is recommended every 12 months for residential applications and
every quarter for commercial applications. Regular servicing of your unit helps in maintaining its optimum performance and
reliability. The following checklist and service periods are provided as a guide only, as some sites may require more
frequent servicing.
ELECTRICAL
Parts
Service Period
Detail of Service Check Service Methods
1
Mth
3
Mth
6
Mth
1
Yr
2
Yrs
3
Yrs
4
Yrs
5
Yrs
Printed Circuit
Boards Visual Inspection Tighten Terminals as necessary on printed circuit boards
Electrical
Connections Check all electrical terminals,
mains, communications, etc Re-tighten if loose.
INDOOR UNIT
Parts
Service Period
Detail of Service Check Service Methods
1
Mth
3
Mth
6
Mth
1
Yr
2
Yrs
3
Yrs
4
Yrs
5
Yrs
Casing / Panels and
Frames Visual check for damage, rust
and dust accumulation.
For highly corrosive
environment, wash panels
quarterly with water and
neutral detergent solution. Wax
panels. Repair / re-paint where
required.
Insulation Visual check for insulation
conditions.
Repair / replace insulation
material.
Fan Visual check for run out of
balance and dust attached
Clean off dust as necessary
to negate possibility of fan
running out of balance
Motor 
Ω
Visual check on wiring.
Insulation resistance check to
be carried out annually
Measure insulation resistance.
Reading should be more than
1M.
Heat
Exchanger Check for clogging by dust.
Check for leaks / damage.
Clean air inlet side as necessary.
Straighten any bent fins using
fins comb.
Drain Pan/
Condensation line Check for obstructions and
free flow of water
Clean to eliminate
obstructions/ sludge and check
condition of pan. Pour water to
ensure flow
Filter* Check for clogging by dust. Clean Filter
Temperature
Readings Measure air on and air off Place temperature probe in
return and supply air of unit.
Damper Motors
(if fitted) Visual inspection of motors
open/closing. Ensure no
obstructions
Drive motors opened and
closed. Ensure correct
operation
Duct Works Inspect duct works for air
gaps. Re-tape any loose ducts.
* Service period for filter cleaning may vary depending on operating time and surrounding environment.

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Owner’s Manual ECOFLEX MINI VRF R-32 SERIES - 4 WAY COMPACT CASSETTE
Doc. No.9590-4028-05 Ver. 1 230821
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