Kaisai FLY INVERTER Series User manual

IMPORTANT NOTE:
Read this manual carefully before installing or operating your new air conditioning unit.
Make sure to save this manual for future reference.
KAISAI FLY
INVERTER SERIES
R32 UNITS SERVICE MANUAL

Table of Contents Page
1. Safety Precautions .................................................................. 1
1. Precautions
2. Information servicing
2. Specifications ........................................................................ 7
1. Model Reference
2. Electrical Wiring Diagrams
3. Product Features.................................................................... 13
1. Operation Modes and Functions
4. Maintenance and Disassembly .................................................... 20
1. Maintenance
2. Disassembly
5. Troubleshooting........................................................................59
1. Safety Caution
2. General Troubleshooting
3. Error Diagnosis and Troubleshooting Without ErrorCode
4. Quick Maintenance by Error Code
5. Troubleshooting by Error Code
Appendix .................................................................................. 86
i) Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C –K)
ii) Temperature Sensor Resistance Value Table for TP (°C –K)
iii) Pressure On Service Port
Caution: Risk of fire/flammable material

Contents
1. Precautions................................................................................. 2
2. Information servicing ..................................................................... 3
Safety Precautions

1. Precautions
Toprevent personal injury, or property or unit damage,
adhere to all precautionary measures and instructions
outlinedinthismanual. Before servicing a unit, refer tothis
service manual and its relevantsections.
Failuretoadheretoallprecautionarymeasureslistedinthis
section may result in personal injury, damage to the unit or
to property, or in extreme cases,death.
WARNING indicates a potentially hazardous
situation which if not avoided could result in serious
personal injury, or death.
CAUTION indicatesapotentiallyhazardous situation
which if not avoided could result in minor or
moderate personal injury, or unitdamage.
1.1 In case of Accidents or Emergency
WARNING
•Ifa gasleak is suspected, immediately turn offthe
gasandventilatetheareaifagasleakissuspected
before turning the unit on.
•If strange sounds or smoke is detected from the unit,
turn the breaker off and disconnect the power supply
cable.
•If the unit comes into contact with liquid, contactan
authorized service center.
•If liquid from the batteries makes contact with skin or
clothing, immediately rinse orwash the area well with
clean water.
•Do not insert hands or other objects into the air inlet
or outlet while the unit is plugged in.
•Do not operate the unit with wet hands.
•Do not use a remote controller that has previously
beenexposedtobatterydamageorbatteryleakage.
CAUTION
•Clean andventilatetheunitatregular intervalswhen
operating it near a stove or near similar devices.
•Donot usethe unitduring severeweather conditions.
If possible, remove the product from the window
before such occurrences.
1.2 Pre-Installation and Installation
WARNING
•Use this unit only on a dedicatedcircuit.
•Damagetotheinstallationareacouldcausetheunit
to fall, potentially resulting in personal injury, prop-
erty damage, or product failure.
•Onlyqualifiedpersonnelshoulddisassemble,install,
remove, or repair the unit.
•Only a qualified electrician should perform electri-
cal work. Formore information, contact your dealer,
seller, or an authorized KAISAI service center.
Page 2
1.3 Operation and Maintenance
WARNING
•Donotusedefectiveorunder-ratedcircuitbreakers.
•Ensurethe unit is properlygrounded andthat a
dedicated circuit and breaker are installed.
•Do not modify or extend the power cable. Ensure
thepowercableissecureandnotdamagedduring
operation.
•Do not unplug the power supply plug during
operation.
•Donotstoreoruseflammablematerialsnearthe
unit.
•Do not open the inlet grill of the unit during
operation.
•Do not touch the electrostatic filter if the unitis
equipped with one.
•Do not block the inlet or outlet of air flow to the unit.
•Donotuseharshdetergents,solvents,orsimilaritems
to clean the unit. Use a soft cloth forcleaning.
•Do not touch the metal parts of the unit when
removing the airfilter asthey are very sharp.
•Do not step on or place anything on the unit or
outdoor units.
•Do not drink water drained from the unit
•Avoid direct skin contact with water drained from the
unit.
•Usea firm stoolorstepladder accordingto
manufacturerprocedureswhencleaningor
maintaining the unit.
CAUTION
•Do not install or operate the unit for an extended
period of time in areas of high humidity or in an
environmentdirectlyexposingit to seawind orsalt
spray.
•Do not install the unit on a defective or damaged
installation stand, or in an unsecure location.
•Ensure the unit is installed at a level position
•Do not install the unit where noise or air discharge
created by the outdoor unit will negatively impact the
environment or nearby residences.
•Do not expose skin directly to the air discharged by
the unit for prolonged periods of time.
•Ensuretheunitoperatesinareas waterorother
liquids.
•Ensurethedrainhoseisinstalledcorrectlytoensure
proper water drainage.
•When lifting or transporting the unit, it is
recommended that two or more people are used for
this task.
•When the unit is not to be used for an extended time,
disconnect the power supply or turn off the breaker.
•
Whileunpackingbecarefulofsharpedgesaround
the unit as well as the edges ofthe fins on the con-
denser and evaporator.
Safety
Precautions

2. Information servicing
2.1 Checks to the area
• Prior to beginning work on systems containing flammable
refrigerants,safetychecksarenecessarytoensurethatthe
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.
2.2 Work procedure
• Workshallbeundertakenunderacontrolledprocedureso
astominimise the risk ofa flammablegas orvapour being
present while the work is beingperformed.
2.3 Work procedure
• 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 beavoided.
• The area around the work space shall be sectioned off.
Ensurethattheconditionswithintheareahavebeenmade
safe by control of flammable material.
2.4 Checking for presence of refrigerant
• Theareashall bechecked withanappropriaterefrigerant
detector prior to and during work, to ensure the technician
is aware of potentially flammableatmospheres.
• Ensure that the leak detection equipment being used is
suitableforuse withflammablerefrigerants,i.e.nosparking,
adequately sealed or intrinsically safe.
2.5 Presence of fire extinguisher
• If any hot work is to be conducted on the refrigeration
equipment or any associated parts, appropriate fire
extinguishing equipment shall be available tohand.
• Havea drypowder orCO2fireextinguisher adjacentto the
charging area.
2.6 No ignition sources
• No person carrying out work in relation to a refrigeration
systemwhichinvolvesexposinganypipeworkthatcontains
orhascontainedflammablerefrigerantshalluseanysources
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,removinganddisposal,duringwhich
flammable refrigerant can possibly be released to the
surrounding space.
• Prior to work taking place, thearea around the equipment
istobesurveyedtomakesurethat therearenoflammable
hazards or ignition risks.
• NO SMOKING signs shall bedisplayed.
2.7 Ventilated area
• Ensure that the area isin theopen or that itisadequately
ventilated before breaking into the
• system or conducting any hot work. A degree of ventilation
shall continue during the period
• that the workis carried out.The ventilationshouldsafely
disperse any released refrigerant
• and preferably expel it externally into theatmosphere.
2.8 Checks to the refrigeration equipment
• Where electrical components are being changed,
they shall be fit for the purpose and to the correct
specification. At all times the manufacturer’s
maintenanceandserviceguidelinesshallbefollowed.
If in doubt consult the manufacturer’s technical
department for assistance. The following checks
shallbeappliedtoinstallationsusingflammable
refrigerants:
• thechargesizeis inaccordancewiththeroom size
within which the refrigerant containing parts are
installed;
• theventilationmachineryandoutletsare operating
adequately and are not obstructed;
• if an indirect refrigerating circuit is being used, the
secondarycircuitshallbecheckedforthepresence
of refrigerant; marking to the equipment continues
to be visible and legible.
• markingsandsignsthatareillegibleshallbe
corrected;
• refrigeration pipe or components are installed in
a position where they are unlikely tobe exposed
to any substance which may corrode refrigerant
containingcomponents, unlessthe components
areconstructedofmaterialswhichareinherently
resistanttobeingcorrodedoraresuitablyprotected
against being so corroded.
2.9 Checks to electrical devices
• Repairandmaintenancetoelectricalcomponentsshall
includeinitialsafetychecksandcomponentinspection
procedures. If a fault exists that could compromise
safety,thennoelectrical supplyshallbeconnectedto
the circuit until it is satisfactorily dealt with. If the fault
cannotbecorrectedimmediatelybutitisnecessaryto
continue operation, an adequate temporary solution
shall be used. This shall be reported to the owner of
theequipmentsoallpartiesareadvised.Initialsafety
checks shall include:
Page 3
Safety
Precautions

• thatcapacitorsaredischarged:thisshallbedonein
a safe manner to avoid possibility of sparking;
• thatthere no liveelectrical components and wiring
areexposedwhilecharging,recoveringor purging
the system;
• that there is continuity of earthbonding.
2.10 Repairs to sealed components
• During repairs to sealed components, all electrical
suppliesshallbedisconnectedfromtheequipment
being worked upon prior to any removal of sealed
covers, etc. If it is absolutely necessary to have an
electricalsupplytoequipmentduringservicing,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
ensurethatbyworkingon electricalcomponents,the
casing is not altered in such a way that the level of
protection is affected. This shall include damage to
cables,excessivenumberofconnections,terminals
not made to original specification, damage to seals,
incorrect fitting of glands, etc.
• Ensure that apparatus is mounted securely.
• 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.
NOTE: The use of silicon sealant may inhibit the
effectivenessofsometypesofleakdetectionequipment.
Intrinsicallysafecomponentsdo nothavetobeisolated
prior to working on them.
2.11 Repair to intrinsically safe components
• Donot applyanypermanentinductiveorcapacitance
loads to the circuit without ensuring that this will not
exceedthepermissiblevoltageandcurrentpermitted
fortheequipmentinuse.Intrinsicallysafecomponents
are the only types that can be worked on while live
inthepresenceofaflammableatmosphere.Thetest
apparatus shall be at the correctrating.
• Replacecomponentsonlywithpartsspecifiedbythe
manufacturer. Other parts may result in the ignition of
refrigerant in the atmosphere from aleak.
2.12 Cabling
• Check that cabling will not be subject to wear,
corrosion,excessivepressure,vibration,sharpedges
oranyotheradverseenvironmentaleffects.Thecheck
shall also take into account the effects of aging or
continual vibration from sources such as compressors
or fans.
2.13 Detection of flammable refrigerants
• Under no circumstances shall potential sources of
ignition be used in the searching for or detection of
refrigerant leaks. A halide torch (oranyother detector
using a naked flame) shall not beused.
2.14 Leak detection methods
• The following leak detection methods are deemed
acceptable for systems containing flammable
refrigerants.Electronicleakdetectorsshallbeused
to detect flammable refrigerants, but the sensitivity
may not be adequate, or may need re-calibration.
(Detection equipment shall be calibrated in a
refrigerant-freearea.)Ensurethatthedetectorisnot
a potential source of ignition and is suitable for the
refrigerantused.Leakdetectionequipmentshallbe
setata percentage of the LFLof the refrigerant and
shall be calibrated to the refrigerant employed and
theappropriate percentage of gas(25% maximum)
is confirmed. Leak detection fluids are suitable for
use with most refrigerants but the use of detergents
containingchlorineshallbeavoidedasthechlorine
may react with the refrigerant and corrode the copper
pipe-work.
• Ifaleakissuspected,allnakedflamesshallbe
removed or extinguished.
• If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall be recovered
from the system, or isolated (by means of shut off
valves)inapart of thesystemremotefromtheleak.
Oxygen free nitrogen (OFN) shall then be purged
through the system both before and during the
brazing process.
2.15 Removal and evacuation
• When breaking into the refrigerant circuit to make
repairs or for any other purpose, conventional
proceduresshallbeused.However,itis important
thatbestpracticeisfollowedsinceflammabilityisa
consideration.
• The following procedure shall be adheredto:
• remove refrigerant;
• purge the circuit with inert gas;
• evacuate;
• purge again with inert gas;
• open the circuit by cutting or brazing.
Page 4
Safety
Precautions

• 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
needtoberepeatedseveraltimes.Compressedairor
oxygenshallnotbe used forthistask.Flushingshall
be achieved by breaking the vacuum in the system
with OFN and continuing to fill until the working
pressureisachieved,thenventingtoatmosphere,and
finally pulling down to a vacuum. This process shall
be repeated until no refrigerant is within the system.
WhenthefinalOFNchargeisused,thesystemshall
be vented down to atmospheric pressure to enable
work totake place. This operation isabsolutelyvital if
brazing operations on the pipe-work are to take place.
• Ensure that the outlet for the vacuum pump is not
closetoanyignitionsourcesandthereisventilation
available.
2.16 Charging procedures
• Inadditiontoconventionalchargingprocedures,the
following requirements shall be followed:
• Ensurethat contaminationofdifferentrefrigerants
does not occur when using charging equipment.
Hoses or lines shall be as short as possible to
minimize the amount of refrigerant contained in
them.
• Cylinders shall be kept upright.
• Ensurethattherefrigerationsystemisearthedprior
to charging the system with refrigerant.
• Labelthesystem whenchargingiscomplete(ifnot
already).
• Extremecareshallbetaken not tooverfillthe
refrigeration system.
• Prior to recharging the system it shall be pressure
testedwithOFN.Thesystemshallbeleaktestedon
completion of charging but prior to commissioning.
A follow up leak test shall be carried out prior to
leaving the site.
2.17 Decommissioning
Beforecarryingoutthisprocedure, it is essentialthatthe
technician is completely familiar with the equipment and
all its detail. It is recommended good practice that all
refrigerantsarerecoveredsafely.Priortothetaskbeing
carriedout, anoil and refrigerantsampleshall be taken.
Incaseanalysisis requiredpriortore-useofreclaimed
refrigerant.Itisessentialthatelectricalpowerisavailable
before the task is commenced.
• Become familiar with the equipment and its operation.
• Isolate system electrically.
• Before attempting the procedure ensure that:
• mechanicalhandlingequipmentisavailable,if
required, for handling refrigerant cylinders;
• allpersonalprotectiveequipmentisavailableand
being used correctly;
• therecoveryprocessissupervisedatalltimesbya
competent person;
• recoveryequipmentandcylindersconformtothe
appropriate standards.
• Pump down refrigerant system, ifpossible.
• If a vacuum is not possible, make a manifold so that
refrigerantcan beremoved from variousparts of the
system.
• Makesurethatcylinderissituatedonthescalesbefore
recovery takes place.
• Starttherecoverymachineandoperateinaccordance
with manufacturer’s instructions.
• Do not overfill cylinders. (No more than 80 % volume
liquid charge).
• Donot exceed themaximumworking pressureofthe
cylinder, even temporarily.
• Whenthecylindershavebeenfilledcorrectlyand the
processcompleted,makesurethat thecylindersand
theequipment are removed from site promptly and all
isolation valves on the equipment are closed off.
• Recovered refrigerant shall not be charged into
anotherrefrigerationsystemunlessithasbeencleaned
and checked.
2.18 Labelling
• Equipmentshallbelabelledstatingthatithas beende-
commissioned and emptied of
• refrigerant.Thelabelshallbedatedandsigned.Ensure
that there are labels on the equipment stating the
equipment contains flammable refrigerant.
2.19 Recovery
• When removing refrigerant from a system, either for
servicingordecommissioning,itisrecommendedgood
practice that all refrigerants are removed safely.
• Whentransferringrefrigerantintocylinders,ensure
thatonlyappropriaterefrigerantrecoverycylinders
areemployed.Ensurethatthecorrectnumbers 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.specialcylindersfortherecoveryof
refrigerant).Cylindersshallbecompletewithpressure
relief valve and associated shut-off valves in good
working order.
Page 5
Safety
Precautions

• 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 besuitable for the
recovery of flammable refrigerants. In addition, a set
ofcalibratedweighingscalesshallbeavailableandin
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 properlymaintained 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,
andtherelevantWasteTransferNotearranged.Donot
mixrefrigerantsinrecoveryunitsandespeciallynotin
cylinders.
• Ifcompressorsorcompressoroilsaretoberemoved,
ensure that they have been evacuated to an
acceptable level to make certain that flammable
refrigerant does not remain within thelubricant.
The evacuation process shall be carried out prior to
returningthecompressortothesuppliers.Onlyelectric
heating to the compressor body shall be employed
toacceleratethisprocess.Whenoilisdrainedfroma
system, it shall be carried outsafely.
Page 6
Safety
Precautions

Contents
1. Model Reference .......................................................................... 8
2. Electrical Wiring Diagrams............................................................... 9
2.1 Indoor Unit..................................................................................................9
2.2 Outdoor Unit .............................................................................................11
Specifications

1. Model Reference
Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased
equipment.
Indoor Unit Model
Outdoor Unit Model
Capacity (Btu)
Power Supply
KWX-09HRDI
KWX-09HRDO
9k
220-240V~, 50Hz,
1Phase
KWX-12HRDI
KWX-12HRDO
12k
KWX-18HRDI
KWX-18HRDO
18k
KWX-24HRDI
KWX-24HRDO
24k
Page 8
Specifications

2. Electrical Wiring Diagrams
2.1 Indoor unit
Abbreviation
Paraphrase
Y/G
Yellow-Green Conductor
ION
Positive and Negative Ion Generator
CAP
Capacitor
PLASMA
Electronic Dust Collector
L
LIVE
N
NEUTRAL
Heater
The Electric Heating Belt of Indoor Unit
T1
Indoor Room Temperature
T2
Coil Temperature of Indoor Heat Exchanger Middle
Page 9
Specifications

INDOOR WIRING DIAGRAM
Y/G
16022000020169
OPTIONAL
Applicable
to AC motor
only
M
CAP
2 CN701
4
OPTION
AL
X Y
HA
HB
OPTIONAL
OPTIONA
12V/5
V
,
Page 10
KWX-09HRDI
KWX-12HRDI
KWX-18HRDI
KWX-24HRDI
Specifications

2.2 Outdoor Unit
Abbreviation
Paraphrase
4-WAY
Gas Valve Assembly/4-WAY VALVE
AC-FAN
Alternating Current FAN
DC-FAN
Direct Current FAN
CT1
AC Current Detector
COMP
Compressor
L-PRO
Low Pressure Switch
H-PRO
High Pressure Switch
EEV
Electronic Expansion Valve
KWX-09/12/18HRDO
Page 11
BLUE OR
BLACK
Y/
G
Y/
G
BROW
N
W 1(L) 2(N) S L N
Y/
G
Y/
G
CN
7
Y/
G
OPTION
AL: DC-
FAN
AC-FAN
CAPACIT OR
AMBIENT TEMP. SENSOR
RE D
Specifications

KWX-24HRDO
Page 12
16022000019
069
Applicable to
the units
adopting DC
motor only
Applicable to
the units
adopting AC
motor only
HEATER2
CN4
BROWN
BLU
E
CN3
0
BLACK(BL
UE)
HEATER
1
Specifications
OPTION AL
OPTION AL

Contents
1. Operation Modes and Functions ...................................................... 14
1.1 Abbreviation..............................................................................................14
1.2 Safety Features ........................................................................................14
1.3 Display Function .......................................................................................14
1.4 Fan Mode..................................................................................................15
1.5 Cooling Mode............................................................................................15
1.6 Heating Mode ...........................................................................................15
1.7 Auto-mode................................................................................................16
1.8 Drying Mode .............................................................................................16
1.9 Forced Operation Function.......................................................................16
1.10 Sleep Function..........................................................................................16
1.11 Auto-Restart Function...............................................................................16
1.12 Refrigerant Leakage Detection .................................................................17
1.13 8°C Heating(Optional)..............................................................................17
1.14 Self Clean(Optional).................................................................................17
1.15 Follow Me(Optional).................................................................................17
1.16 Silence（Optional)....................................................................................17
1.17 Information Inquiry....................................................................................17
Product Features

1. Operation Modes and Functions
1.1 Abbreviation
Unit element abbreviations
Abbreviation
Element
T1
Indoor room temperature
T2
Coil temperature of evaporator
T3
Coil temperature of condenser
T4
Outdoor ambient temperature
TS
Set temperature
TP
Compressor discharge temperature
1.2 Safety Features
Compressor three-minute delay at restart
Compressor functions are delayed for up to one minute
upon the first startup of the unit, and are delayed for up
to three minutes upon subsequent unit restarts.
Zero crossing detection error protection
If AC can not detect zero crossing signal for 4 minutes or
thezerocrossing signaltimeinterval is notcorrect,theunit
will stop and the LED will display the failure. The correct
zero crossing signal time interval should be between
6-13ms.
Automatic shutoff based on discharge temperature
If the compressor discharge temperature exceeds 108°C
for a period of time, the compressor ceases operation.
Automatic shutoff based on fan speed
If the indoor fan speed registers below 300RPM for an
extended period of time, the unit ceases operation and the
corresponding error code is displayed onthe indoor unit.
Inverter module protection
Theinvertermodulehasanautomaticshutoffmechanism
based on the unit’s current, voltage, and temperature.
If automatic shutoff is initiated, the corresponding error
codeisdisplayedon theindoorunitandtheunitceases
operation.
Indoor fan delayed operation
• When the unit starts, the louver is automatically
activated and the indoor fan will operate after a period
of 7 seconds.
• If the unit is in heating mode, the indoor fan is
regulated by the anti-cold wind function.
Page 14
Compressor preheating
PreheatingisautomaticallyactivatedwhenT4sensoris
lower than 3°C.
Sensor redundancy and automatic shutoff
• If one temperature sensor malfunctions, the air
conditioner continues operation and displays the
correspondingerrorcode,allowingforemergencyuse.
• When more than one temperature sensor is
malfunctioning,theairconditionerceasesoperation.
Refrigerant leakage detection
Thisfunctionisactiveonlywhencoolingmodeisselected.
It will detect if the compressor is being damaged by
refrigerant leakage or by compressor overload. This is
measured using the coil temperature of evaporator T2
when the compressor is in operation.
1.3 Display Function
Unit display functions
Function
Display
Temperature
Set temperature value
Temperature
(fan and Drying
mode)
Room temperature
Activation of Timer
ON, Fresh, Swing,
Turbo, or Silent
(3s)
Cancellation of
Timer OFF, Fresh,
Swing, Turbo, or
Silent
(3s)
Defrost
Warming in heating
mode
Self-clean (available
on select units only)
Heating in room
temperature
under 8°C
Product Features

1.4 Fan Mode
When fan mode is activated:
• The outdoor fan and compressor are stopped.
• Temperaturecontrolisdisabledandnotemperature
setting is displayed.
• The indoor fan speed can be set to high, medium, low,
or auto.
• Thelouveroperationsareidenticaltothoseincooling
mode.
• Autofan:Infan-onlymode,ACoperates thesameas
auto fan in cooling mode with the temperature set at
24°C.
1.5 Cooling Mode
1.5.1 Compressor Control
T means the temperature compensation.
• When T1-Ts <  T-2 ℃ , the compressorceases
operation.
• WhenT1-Ts>T+3℃,thecompressorcontinues
operation.
• When the AC is operating in mute mode, the
compressor operates at a low frequency.
• Whenthecurrentexceedsthepresetvalue,thecurrent
protection function activates and the compressor
ceases operation.
1.5.2 Indoor Fan Control
• Incoolingmode,theindoorfanoperatescontinuously.
The fan speed can be set to high, medium, low, or
auto.
• If the compressor ceases operations when the
configured temperature is reached, the indoor fan
motor operates atthe minimum or configured speed.
1.5.3 Outdoor Fan Control
• The outdoor unit will be run at different fan speed
according to T4 and compressor frequency.
• Fordifferentoutdoor units,thefanspeeds are
different.
1.5.4 Condenser Temperature Protection
Whencondensertemperatureismorethansettingvalue,
the compressor ceases operations..
1.5.5 Evaporator Temperature Protection
Whenevaporatortemperaturedropsbelowaconfigured
value,thecompressorandoutdoorfanceaseoperations.
1.6
Heating Mode
1.6.1 Compressor Control
T means the temperature compensation.
• When T1-Ts>-T, the compressor ceases operation.
• When T1-Ts<-  T-1.5°C, the compressor continues
operation.
• When the AC is operating in mute mode, the
compressor operates at a low frequency.
• Whenthecurrentexceedsthepresetvalue,thecurrent
protection function activates and the compressor
ceases operation.
1.6.2 Indoor Fan Control:
• When the compressor is on, the indoor fan can be
set to high/medium/low/auto. And the anti-cold wind
function has the priority.
• When indoor unit coil temp. is low, the anti-cold air
function will start and indoor fan motor will run at low
speed, the speed can’t be changed ,when the temp.
is lower than setting value, the indoor fan motor will
stop.
• When the indoor temp reaches the setting temp., the
compressor will stop, the indoor fan motor will run at
theminimum speedorsettingspeed.(Theanti-coldair
function is valid).
1.6.3 Outdoor Fan Control:
• The outdoor unit will be run at different fan speed
according to T4 and compressor frequency.
• Fordifferentoutdoor units,the fanspeeds are
different.
1.6.4 Defrosting mode
• The unit entersdefrosting mode according tothe
temperature value of T3 and T4 as well as the
compressor running time.
• Indefrostingmode,thecompressorcontinues torun,
the indoor and outdoor motor will cease operation,
the defrost light of the indoor unit will turn on, and
the “” symbol isdisplayed.
• If any one of the following conditions is satisfied,
defrostingendsand themachineswitchestonormal
heating mode:
• T3 rises above TCDE1°C.
• T3maintained above TCDE2°C for 80 seconds.
• Unitruns for15 minutesconsecutivelyindefrosting
mode.
1.6.5 Evaporator Temperature Protection
Whentheevaporatortemperatureexceedsapreset
protection value, the compressor ceases operations.
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Product Features

1.7 Auto-mode
• Thismodecanbeselected with theremote controller
andthe settingtemperature canbechangedbetween
17°C~30°C.
• Inautomode,themachineselectscooling,heating,or
fan-only mode on the basis of T (T =T1-Ts).
T
Running mode
T>2℃
Cooling
-2℃T2℃
Fan-only
T<-2℃
Heating*
Heating*: In auto mode, cooling only models run the fan
• Thelouveroperatessameasinrelevantmode.
• If the machine switches mode between heating and
cooling,thecompressorwill keepstoppingforcertain
time and then choose mode according to T1-Ts.
• If the setting temperature is modified, the machine will
choose running function again.
1.8 Drying mode
• Indoor fan speed is fixed at breeze and can’t be
changed.Thelouverangleisthesameasincooling
mode.
• Allprotectionsareactiveandthesameasthatin
cooling mode.
1.9 Forced operation function
• Forced cooling mode:
The compressor and outdoor fan continue to run and
the indoor fan runs at low speed. After running for 30
minutes, the AC will switch to auto mode with a preset
temperature of 24°C.
• Forced auto mode:
Forcedautomodeoperatesthesameasnormalautomode
with a preset temperature of 24°C.
• Theunitexitsforcedoperationwhenitreceivesthe
following signals:
• Switchon
• Switch off
• Timeron
• Timer off
• Changes in:
• mode
• fan speed
• sleeping mode
• Followme
1.10 Sleep function
• Thesleepfunctionisavailableincooling,heating,or
auto mode.
• The operational process for sleep mode is as follows:
• When cooling, the temperature rises 1°C (to not
higher than 30°C) every hour. After 2 hours, the
temperature stops rising andthe indoorfan is fixed
at low speed.
• When heating, the temperature decreases 1°C(to
not lower than 17°C) every hour. After 2 hours, the
temperaturestopsdecreasingandtheindoorfanis
fixed at low speed. Anti-cold wind function takes
priority.
• The operating time for sleep mode is 7hours, after
which, the unit exits this mode and switches off.
• The timer setting is available in thismode.
1.11 Auto-Restart function
• The indoor unit has an auto-restart module that
allows the unit to restart automatically. The module
automaticallystoresthecurrentsettings(notincluding
the swing setting) and, inthe case of a sudden power
failure, will restore those setting automatically within 3
minutes after power returns.
• If the unit was in forced cooling mode, it will run in
this mode for 30 minutes and turn to auto mode with
temperature set to 24°C.
• If there is a power failure while the unit is running, the
compressor starts 3 minutes after the unit restarts. If
the unit was already off before the power failure, the
compressor starts 1 minute after the unit restarts.
1.12 Refrigerant Leakage Detection
With this new technology, the display area will show “EC”
when the outdoor unit detects refrigerant leakage.
1.13 8°C Heating(Optional)
In heating mode, the temperature can be set to as low
as 8°C, preventing the indoor area from freezing if
unoccupied during severe coldweather.
1.14 Self clean(Optional)
• If you press “Self Clean” when the unit is in cooling or
drying mode:
• For cooling models, the indoor unit will run in low
fanmodefor acertaintime, thenceasesoperation.
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Product Features

• For heat pump models, the indoor unit will run in
fan-only mode, then low heat, and finally in fan-
only mode.
• SelfCleankeepstheindoorunitdryandprevents
mold growth.
1.15 Follow me(Optional)
• If you press “Follow Me” on the remote, the indoor
unit will beep. This indicates the follow me function is
active.
• Once active, the remote control will send a signal
every3minutes,withno beeps.Theunitautomatically
setsthetemperatureaccordingtothemeasurements
from the remote control.
• The unit will only change modes if the information
fromtheremotecontrolmakesitnecessary,notfrom
the unit’s temperature setting.
• If the unit does not receive a signal for 7 minutes or
you press “Follow Me,” the function turns off. The
unitregulatestemperaturebasedonitsownsensor
and settings.
1.16 Silence (Optional)
Press “Silence” on the remote control to enable the
SILENCE function. While this function is active, the
compressorfrequencyismaintainedatalowerlevelthan
F2. The indoor unit will run atfaint breeze, which reduces
noise to the lowest possible level.
1.17 Information Inquiry
• Toenter informationinquirystatus, complete the
following procedure within ten seconds:
• Press LED 3 times.
• Press SWING 3 times.
• Ifyouare successful, youwillhearbeepsfor two
seconds.
• UsetheLEDandSWINGbuttonstocyclethrough
information displayed.
• Pressing LED will display the next code in the
sequence. Pressing SWING will show the previous.
• The following table shows information codes. The
screenwilldisplaythiscodefortwoseconds,then the
information for 25 seconds.
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Product Features

Displayed code
Explanation
Displayed
value
Meaning
Additional Notes
T1
T
T
T4
Tb
TP
TH
FT
F
Room temperature
-1F,-1E,-1d,-1c,-
1b,-1A
-19—99
A0,A1,…A9
b0,b1,…b9
c0,c1,…c9
d0,d1,…d9
E0,E1,…E9
F0,F1,…F9
-25,-24,-23,-22,
-21,-20
-19—99
100,101,…109
110,111,…119
120,121,…129
130,131,…139
140,141,…149
150,151,…159
1. All displayed temperatures
use actual values.
2. All temperatures are
displayed in °C regardless
of remote used.
3. T1, T2, T3, T4, and T2B
displayranges from -25to
70 °C. TP display ranges
from -20 to 130 °C.
4. The frequency display
ranges from 0 to159HZ.
5. Iftheactualvaluesexceed
or fall short of thedefined
range, the values closest
to the maximum and
minimum values will be
displayed.
Indoor coil
temperature
Outdoor coil
temperature
Ambient
temperature
Outlet temperature
of indoor coil
Discharge
temperature
Suction temperature
Targeted frequency
Actual frequency
IF
Indoor fan speed
0
1,2,3,4
14-FF
OFF
Low speed, Medium
speed, High speed,
Turbo.
Actual fan speed is
equal to the display
value converted to
decimal value and
multiplied by 10. This
is measured in RPM.
N/A
Usedforsomelargecapacity
motors.
Usedforsomesmallcapacity
motors.
The display value is 14-FF
(hexadecimal). The
corresponding fan speed
ranges from 200 to 2550RPM.
OF
Outdoor fan speed
L
EXV opening angle
0-FF
Actual EXV opening
value is equal to
the display value
converted to decimal
value and then
multiplied by 2.
-
CT
Compressor
continuous running
time
0-FF
0-255 minutes
If the actual value exceeds
or falls short of the defined
range,thevalueclosesttothe
maximum and minimum will
be displayed.
T
Causes of
compressor stop
0-99
For a detailed
explanation, contact
technical support.
-
Page 18
Product Features