Frigicoll MIH200T1N18 Installation instructions

Read this manual carefully before using the product, and keep it for future reference.
All the pictures in this manual are for illustration purpose only.
MIH200T1N18 (KPDUF-200 DN5.0)
MIH252T1N18 (KPDUF-252 DN5.0)
MIH280T1N18 (KPDUF-280 DN5.0)
MIH400T1N18 (KPDUF-400 DN5.0)
MIH450T1N18 (KPDUF-450 DN5.0)
MIH560T1N18 (KPDUF-560 DN5.0)
INSTALLATION AND OWNER'S
MANUAL
High Static Presure Duct

Contents
About the Documentation 1
About This Document / 1 Safety Instructions / 2
Safety Precautions / 3
About the Refrigerant / 5
Electric Safety Requirements / 4
Operation Precautions / 8
Symptoms That Are Not Faults / 11
Disposal / 13
Optimum Operation / 9
Display Box (Optional) / 13
Installation Precautions / 14
Preparations Before Installation / 23
Refrigerant Connecting Piping Installation / 28
Air Duct Installation / 38
Error Codes / 57
Test Run / 66
Installation Materials / 21
Indoor Unit Installation / 25
Drain Pipe Installation / 34
Electrical Connection / 41
Settings / 62
Safety Warning / 68
Maintenance of Conventional Parts / 72
Cleaning / 68
Safety Warning 3
Operation 8
Installation 14
Maintenance and Service 68

1
About the Documentation
1 About This Document
Note
Make sure that the user has the printed documentation and ask him/her to keep it for future reference.
Target audience
Authorised installers + end users
Note
This appliance is intended to be used by expert or trained users in shops, in light industry, and on farms, or for
commercial and household use by lay persons.
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.
Documentation set
This document is part of a documentation set. The complete set consists of:
▪ General safety precautions:
▪ Safety instructions that you must read before installing
▪ Indoor unit installation and operation manual:
▪ Installation and operation instructions
▪ Repeater installation and operation manual:
▪ Installation and operation instructions
▪ Controller installation and operation manual:
▪ Installation and operation instructions
Please refer to the product manual for other accessories.
Technical engineering data
Latest revisions of the supplied documentation may be available via your dealer.
The original documentation is written in English. All other languages are translations.

2
2 Safety Instructions
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.
Safety Signs
Danger Indicates a hazard with a high level of risk which, if not avoided, will result in serious injury.
Warning Indicates a hazard with a medium level of risk which, if not avoided, could result in serious injury.
Caution Indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate
injury.
Note Useful operation and maintenance information.
Explanation of Symbols Displayed on the Unit
WARNING This symbol shows that this appliance used a ammable refrigerant. If the refrigerant is
leaked and exposed to an external ignition source, there is a risk of re.
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.
WARNING: Risk of re
(for IEC 60335-2-40: 2018 only)
WARNING: Risk of re
(for IEC/EN 60335-2-40 except
IEC 60335-2-40: 2018)
Note
The symbols above are for R32 refrigerant system.

3
Safety Warning
Warning
Ensure Proper Earthing Professional Only
Prohibition signs
No Laying Inammable
Thing
No Strong Currents No Open Flame; Fire,
Open Ignition Source and
Smoking Prohibited
No Acid or Alkali Materials
1 Safety Precautions
Danger
In the event of refrigerant leakage, smoking and open ames 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, liqueed 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 classied 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 2.5m above the
ground.
OFF
2.5m
Indoor unit
>

4
Caution
This appliance can be used by children aged from 8 years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without supervision.
This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for
commercial use by lay persons.
When the product is used for comercial application. This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for commercial use by lay persons.
The sound pressure level is below 70 dB(A).
2 Electric Safety Requirements
Warning
The air conditioner shall be installed according to the local wiring specications.
Wiring work must be completed by qualied electricians.
The air conditioner must be well earthed. Specically, the main switch of the air
conditioner must have a reliable earthing 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 xed wiring to which the air conditioner is connected must be equipped with a
power cut-off device that meets the wiring requirements.
The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent
protection.
The specications of the fuse are printed on the circuit board.
NOTE: For the units with R32 refrigerant, only the blast-proof ceramic fuse can be used.
Caution
Under no circumstances should the earth wires of the power supply system be
disconnected.
Do not use a damaged power supply cable and replace it if it is damaged.
When the air conditioner is used for the rst 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.

5
3 About the Refrigerant
Warning
The following applies to R32 refrigerant systems.
Prior to beginning work on systems containing ammable 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 ammable 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 conned 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 ammable material.
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the
technician is aware of potentially ammable atmospheres.
Ensure that the leak detection equipment being used is suitable for use with ammable 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 re
extinguishing equipment shall be available to hand. Have a dry powder or CO2 re 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 ammable refrigerant shall use any sources of ignition in such a manner that it may
lead to the riskof re or explosion.
All possible ignition sources, including cigarette smoking, should be kept sufciently far away from the site of
installation, repairing, removing and disposal, during which ammable 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
ammable 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 t for the purpose and to the correct specication.
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 ammable refrigerants:
– the charge size is in accordance with the room size within which the refrigerant containing parts are installed;
– the ventilation machinery and outlets are operating adequately and are not obstructed;
– if an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant;
– marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected;
– 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.
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:
-that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
-that no live electrical components and wiring are exposed whiule charging, recovering or purging the system;
-that there is continuity of earth bonding.

6
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 specication, damage to seals, incorrect
tting 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 ammable atmospheres.
Replacement parts shall be in accordance with the manufacturer’s specications.
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 ammable
atmosphere. The test apparatus shall be at the correct rating.
Replace components only with parts specied 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 ammability 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 “ushed”
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 ll until the
working pressure is achieved, then venting to atmosphere, and nally pulling down to a vacuum.
This process shall be repeated until no refrigerant is within the system. When the nal 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.
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.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) 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.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer’s instructions.
h) Do not overll cylinders. (No more than 80 % volume liquid charge).

7
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been lled 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.
k) 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 ammable
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 ammable 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 ammable 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 conrmed as complying to corresponding
partial unit requirements of this International Standard.

8
Operation
1 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 2.5m 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.
Running parts may cause harm to you or transmission assemblies may become damaged.
2. Getting too close to the air conditioner may reduce the level of comfort.
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 re.
Do not place any appliance that uses an open ame in the direct air supply of the air
conditioner as it could interfere with the combustion of the appliance.
Do not use or store ammable gases or liquids such as natural gas, hair spray, paint or
gasoline near the air conditioner. Otherwise, a re 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 ammable sprayers near the air conditioner or spray it directly at the air
conditioner. Otherwise, a re 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, conrm 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.
Do not use fuses like iron or copper wire other than those with the specied capacity.
Otherwise, a malfunction or re may occur. The power supply must use the special circuit
of the air conditioner at the rated voltage.
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.

9
Disposal: Do not dispose of this product as unsorted municipal waste. Collection of such
waste separately for special treatment is necessary.
Do not dispose of electrical appliances as unsorted municipal waste, use separate collection
facilities. Contact your local government for information regarding the collection systems available.
If electrical appliances are disposed of in landlls or dumps, hazardous substances can leak into
the groundwater and get into the food chain, damaging your health and well-being.
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 lter is installed properly. Conrm 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 lter before you
start the air conditioner. Otherwise, dust and mold on the lter could contaminate the air
or produce an unpleasant odor. For more details, please refer to the section “Maintenance
and Service”.
When using the air conditioner for the rst time or replacing the lter, complete the following
settings on the controller:
1. Reset the initial static pressure on the controller or perform a trial run on the outdoor unit
(performed by the installer), and set the current state as a reference state for the unit to
determine the lter state. (For details, see the Application Control section)
2. Set the difference between the initial resistance and the nal resistance of the lter. (For details,
see the wired controller manual.)
If the above operations are not performed, then the unit may not detect the state of the lter
accurately
2 Optimum Operation
As cold air sinks and hot air rises, adjust the direction of louvers respectively in cooling and heating modes to ensure good
cooling and heating effects.
Use the following method to regulate the air outlet assembly (optional).
In Cooling Mode
To improve the cooling effect in the room, adjust the air outlet louvers horizontally.

10
Caution
The downward direction of the louvers of the outlet grille during cooling operation may cause condensation on the air
outlet and guide louvers surface.
In Heating Mode
To improve the heating effect in the lower parts of a room, adjust the louvers of air outlet grille downwards.
Operating Range
Use the unit in the following temperature and humidity ranges for safe and effective operation.
Cooling
Indoor
temperature 16~30°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, generate mist-like cold air from the air outlet
or water dripping out of the unit.)
Heating Indoor
temperature 15~30°C
Caution
If it exceeds this operating range, safety devices may be put in action and the unit may not operate.

11
3 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, the air conditioner starts 3-5 minutes after it is turned ON again in
case it was turned off just before.
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, the outdoor unit’s heat exchanger
may become frosted, which may reduce the heating capacity of the air conditioner. If this occurs,
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.
The Following Symptoms Are Not System Malfunctions
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
When humidity is high during cooling mode, white mist may appear due to the humidity and the temperature
difference between the air inlet and outlet.
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 lter is very dirty, dust may enter the indoor unit and 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
When the indoor humidity is high, condensation and water may drip out of the unit.

12
“Self-cleaning” sound of icing
During self-cleaning, there may be a slight clicking sound from the melting thin ice about 10 minutes.
Noise of Indoor unit
A continuous low “hissing” sound is heard when the system is in “Auto”, “Cool”, “Dry”, and “Heat”
modes. This is the sound of refrigerant gas owing through both indoor and outdoor units.
A “hissing” sound is heard at the start or immediately after stopping operation or defrost operation.
This is the noise of refrigerant caused by ow change.
A “zeen” sound is heard immediately after the power supply is turned on. The electronic expansion
valve inside an indoor unit starts working and makes the noise. it will reduce in about one minute.
A continuous low “shah” sound is heard when the system is in cooling mode, dry mode or at a
stop. When the drain pump (optional accessories) is in operation, this noise is heard.
A “pishi-pishi” squeaking sound is heard when the system stops after heating operation. Expansion
and contraction of plastic parts caused by temperature change make this noise.
A low “sah”, “choro-choro” sound is heard while the indoor unit is stopped. When another indoor
unit is in operation, this noise is heard. In order to prevent oil and refrigerant from remaining in the
system, a small amount of refrigerant is kept owing.
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 controller automatically stops
the compressor 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
In heating mode, the air-conditioning system absorbs heat from the outdoor air and releases heat
to the indoor side. When the outdoor temperature is low, less heat is released. This is the principle
of heat pump.
When the outdoor temperature is extremely low, the heating capacity of the air conditioner
decreases, and other heating equipment may need to be added.
Mode conict
All indoor units in the same refrigerant system can only operate in the same mode, such as cooling,
heating or other modes. Setting to a different mode will make conict and the system will stop. Make
sure all indoor units are running in the same mode.
No heating or cooling permissions
For the same air conditioning system, if outdoor unit operates in changeover mode, the wired
controller of VIP indoor unit allows users to select modes supported by the indoor units, while the
wired controllers of other indoor units displays the icon of “ No permission ”. In this case, other
indoor units can only operate in the same mode as the VIP indoor unit.

13
4 Display Box (Optional)
Display functions:
 In Standby mode, the main interface displays “---”.
 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.
 The light display on the main interface can be turned on or off through the light button on the remote
controller.
 When the system fails or runs in a special mode, the main interface displays the error code or the operating
status codes. For details, see the section “Error Codes and denitions”.
Note
Humidity* : The humidity control functions is customized.
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.
5 Disposal
Components and accessories from the units are not part of ordinary domestic waste.
Complete units , compressors, motors etc. are only to be disposed of via qualied disposal specialists.
This unit uses hydrouorocarbon which is only be disposed of via qualied disposal specialists.

14
Installation
1 Installation Precautions
Qualication and Safety Regulation Requirements
Warning
Please carry out the installation according to local standards.
Ask your local dealer or professionals to install the product.
This unit must be installed by professional technicians with relevant specialized knowledge. Users
MAY NOT install the unit themselves; otherwise, faulty operations may cause the risks of re,
electrical shock, injury, or leakage, which could harm you or others or damage the air conditioner.
Never modify or repair the unit on your own.
Otherwise, a re, electric shock, injury or water leakage may occur. Get your local dealer or a
professional to do so.
Ensure that the residual current device is installed.
The residual current device must be installed. Failure to install it may result in electric shock.
When powering the unit, follow the regulations of the local electric company.
Make sure that the unit is earthed reliably in accordance with laws. If the earthing is not completed
correctly, it may cause electrical shock.
When moving, disassembling or reinstalling the air conditioner, get the assistance of your
local dealer or a professional.
If installed improperly, re, electrical shock, injury, or water leakage may occur.
Use the optional accessories specied by local dealer.
The installation of these accessories must be carried out by professionals. Improper installation
may cause re, electrical shock, water leakage and other hazards.
Use only power supply cable and communication cables that meet specication
requirements. Properly connect all the wiring to make sure that no external forces are
acting on the terminal blocks, power supply cable and communication cables. Improper
wiring or installation may cause a re.
The air conditioner must be earthed. Check whether the earth line is securely connected or
broken. Do not connect the earth line to gas cans, water piping, lightning rods or telephone
earth lines.
The main power switch of the air conditioner should be put in a position that is out of the
reach of children.
It should not be obstructed by ammable objects such as curtains.
Open ames are prohibited when refrigerant leaks are present.
If the air conditioner is not cooling/heating properly, this may be caused by a refrigerant leak. If this
occurs, contact your local dealer or a professional. The refrigerant in the air conditioner is safe,
and usually does not leak.
If there is refrigerant leakage in the room, it is easy for a re to occur after contact with the heating
units of the heater/electric stove/stove. Please disconnect the power supply of the air conditioner,
extinguish the ames of appliances that produce a ame, and open the windows and doors of
the room to allow ventilation and ensure that the concentration of refrigerant leakage in the room
does not exceed a critical level; keep away from the leakage point, and contact the dealer or
professional personnel.
After the refrigerant leakage is repaired, do not start the product until the maintenance
personnel conrms that the leakage is well repaired.
Carefully read this manual before installing the indoor unit.
Designated
products

15
Before and after installation, exposing the unit to water or moisture will cause electrical
short circuit.
Do not store the unit in a humid basement or expose it to rain or water.
Make sure the installation base and lifting are robust and reliable;
Insecure installation of the base may cause the air conditioner to fall, leading to an accident. Take
into full consideration the effects of strong winds, typhoons and earthquakes, and reinforce the
installation.
Check whether the drain pipe can drain the water smoothly.
Improper installation of the pipeline may lead to water leakage, damaging furniture, electric
appliances, and the carpet.
After installation, check whether the refrigerant is leaking.
Do not install the product in a location where there is a danger of ammable gas leaks.
In the event of leakage of combustible gas, the combustible gas surrounding the indoor unit may
cause a re.
Install an air lter of 30-80 mesh/inch at the return air grille to lter dust in the air and keep
the air diffuser clean and free from dirt blockage.
Caution
Keep the indoor unit, outdoor unit, power supply cable, and connecting wires at least 1m away from the high-
power radio equipment, to prevent electromagnetic interference and noise. For some electromagnetic waves, it
is not enough to prevent noise even at a distance of more than 1m.
In a room equipped with uorescent lamps (rectier type or fast start type), the signal transmission distance of
the remote controller (wireless) may not reach the predetermined value. Install the indoor unit as far away from
the uorescent lamp as possible.
Do not touch the ns of the heat exchanger, as this could cause injury.
For safety, please dispose of the packing materials properly.
Nails and other packaging materials may cause personal injury or other risks. Tear up the plastic packaging bag and
dispose of it properly to prevent children from playing with it, leading to suffocation.
Do not cut off the power supply immediately after the indoor unit stops running.
Some parts of the indoor unit like the valve body and water pump are still in operation. Please wait for at least 5 minutes
before cutting off the power supply. Otherwise, water leakage and other faults may occur.
If the length and direction of the air inlet/outlet panel or connecting duct have been changed, complete the
following settings on the controller before use the air conditioner again: (For details, see the Application Control
section)
Reset the initial static pressure on the controller or perform a trial run on the outdoor unit (performed by the installer),
and set the current state as a reference state for the unit to determine the lter status.
If the above operations are not performed, then the unit may not detect the state of the lter accurately.
For evaporating units and condensing units, the instructions or markings shall include a wording to assure
that the maximum operating pressure is considered when connecting to any condenser unit or evaporator unit.
For evaporating units, condensing units and condenser units, the instructions or markings shall include
refrigerant charging instructions.
A warning to assure that partial units shall only be connected to an appliance suitable for the same refrigerant.
This unit is a partial unit air conditioner, complying with partial unit requirements of this International Standard,
and must only be connected to other units that have been conrmed as complying to corresponding partial unit
requirements of this International Standard.
The electrical interfaces shall be specied with purpose, voltage, current, and safety class of construction.
The SELV connection points, if provided, are to be clearly indicated in the instructions.
The connection point should be marked with the “read the instructions” symbol per ISO 7000-0790 (2004-01)
and the Class III symbol according to IEC 60417-5180 (2003-02).
For R32 Refrigerant only.
This unit is equipped with a refrigerant leak detector for safety. To be effective, the unit must be electrically powered at
all times after installation, other than when servicing.
If any supplemental unit is employed to detect leaked refrigerant, such unit shall also apply this marking or be accompanied
by such instructions.
GAS
indoor unit

16
Precautions for Carrying and Lifting the Air Conditioner
1Before carrying the air conditioner, determine the route that will be used to move it to the installation site.
2Do not unseal the air conditioner until it is moved to the installation site.
3
When unpacking and moving the air conditioner, must hold the hanger seat and do not apply force to other parts,
especially the refrigerant piping, drain pipe and plastic accessories, so as to avoid damaging the air conditioner
and causing personal injury.
4
Before installing the air conditioner, make sure that the refrigerant specied on the nameplate is being used. For
the installation of the outdoor unit, refer to the installation instructions in the Installation and Operation Manual
attached with the outdoor unit.
Forbidden Installation Sites
Warning
Do not install or use the air conditioner in the following places:
A place lled with mineral oil, fumes or mist, like a kitchen.
Plastic parts will age and the heat exchanger will become dirty, eventually causing the air
conditioner performance to deteriorate or leak water.
A place where there are corrosive gases, such as acid or alkaline gases. Connecting pipes
and copper welds will be corroded, resulting in refrigerant leakage.
A place exposed to combustible gases and using volatile combustible gases such as diluent
or gasoline.
The electronics in the air conditioner may cause the surrounding gas to ignite.
A place where there is equipment emitting electromagnetic radiation.
The control system will fail and the air conditioner will not function properly.
A place where there is a high salt content in the air like a coastal area.
Do not use the air conditioner in an environment where an explosion may occur.
The unit cannot be installed on moving vehicles such as truck and ship.
Factories with major voltage uctuations in the power supplies.
Other special environmental conditions.
Caution
Air conditioner units of this series are designed to provide comfort. Do not use them in equipment rooms and rooms with
precision instruments, food, plants, animals, or works of art.
Recommended Installation Sites
It is recommended to install the air conditioner according to the design drawing of the HVAC engineer. The selection
principle for the installation site is as follows:
Ensure that the airow in and out of the indoor unit is reasonably organized to form an air circulation in the room.
Ensure indoor unit maintenance space.
Prevent the air conditioner from blowing directly at the human body.

17
Keep the air-conditioning return air away from direct exposure to the sun in the room.
The indoor unit should not be lifted in the places like load-bearing beams and columns that affect the structural safety
of the house.
The wired controller and the indoor unit should be in the same installation space; otherwise, the sampling point
setting of the wired controller needs to be changed.
Choose a site that fully complies with the following conditions and user requirements to install the air
conditioning unit:
There is enough space for installation and maintenance.
The ceiling is level, and the structure is strong enough to support the indoor unit. If necessary, take measures to
reinforce the unit’s stability.
Airow in/out of the machine is not obstructed, and the external air exerts minimum impact.
It is easy to supply airow to every corner of the room.
It is easy to drain uids from the connected piping and water drain piping.
There is no direct heat radiation.
Avoid installation in narrow spaces or where there are more stringent noise requirements.
Install the indoor unit at a place 2.5m above ground.
Condensate water can be discharged smoothly.
The length of the piping between the indoor and outdoor units is within the permitted range. Refer to the Installation
and Operation Manual attached with the outdoor unit.
(access hole)
≥600mm
Maintenance
space
≥500mm
Maintenance
space