Pioneer WYD009AL3JAR-L User manual

WA L L MOUNTED
SPLIT-TYP
SERVICE MANUAL No.TE1307
Models:
WYD009AL3JAR-L
WYD012AL3JAR-L
WYD018GL3JAR-L
WYD024GL3JAR-L
1. IMPORTANT NOTICE···························
2. OPERATION DETAILS··························
3. ELECTRICAL SCHEMATIC DIAGRAM·····
4. EXPLOSION VIEW······························
5. PARTS LIST·······································
WALL MOUNTED SPLIT-TYPEAIR CONDITIONERS
CONTENTS:
1
2
11
13
16

IMPORTANT NOTICE
This service manual is intended for use by individuals possessing adequate
backgrounds of electrical, electronic and mechanical experience. It is
to be installed and service by a licensed HVAC technician. Any
attempt to repair the appliance may result in personal injury and property
damage. The manufacturer or seller cannot be responsible for the
interpretation of this information, nor can it assume any liability in
connection with its use.
The information, specifications and parameter are subject to change due to
technical modification or improvement without any prior notice. The
accurate specifications are presented on the nameplate label.
How to order spare parts
To have your order filled promptly and correctly, please furnish the
following information:
1. Model No. with Indoor or Outdoor
2. No. in the Explosion View
3. Part Name
4. The quantity you ordered


Note: Each mode and relevant function will be further specified in following pages.
SLEEP FAN
TIMER SWING
ON/OFF
MODE
MID
SWING
AUTO
DRY
FAN
HEAT
COOL
FEEL
SLEEP
TIMER ON
HIGH
LOW
TMIER OFF
The remote controller transmits signals to the system.
Remote controller
1
2
4
3
5
6
7
8
8
4
MODE button
FAN SPEED control button
UP button (TOO COOL button)
DOWN button (TOO WARM button)
ON/OFF button
SLEEP button
VANE control button
TIMER button
Used to select the type of operation mode: Feel,
Cooling, Dry, Fan and Heating(Only for Heat Pump).
Used to select the indoor fan motor speed:
Auto, High, Mid and Low.
Used to increase the set room temperature
and time.
Used to decrease the set room temperature
and time.
Used to set or cancel sleep mode operation.
Used to start and stop operation
when pressed.
Used to adjust airflow direction.
Used to select TIMER operation.
Remote controller
6
2
5
3
7
1
Air Conditioner Service Manual
Operation Details
Remote Control
The remote controller is not preset as Cooling Only Air Conditioner or Heat Pump by manufacturer.
Each time after the remote controller replace batteries or is energized, the arrowhead will flash on the front of
Heat or Cool on LCD of the remote controller.
User can preset the remote controller type depending on the air conditioner type you have purchased as
follows:
Press any button when the arrowhead flashes on the front of Cool , Cooling Only is set.
Press any button when the arrowhead flashes on the front of Heat , Heat Pump is set.
If you dont press any button within 10 seconds, the remote controller is preset as Heat Pump automatically.
Note :
If the air conditioner you purchased is a Cooling Only one, but you preset the remote controller as Heat Pump, it
doesn t matter. But if the air conditioner you purchased is a Heat Pump one, and you preset the remote
controller as Cooling Only, then you CAN NOT preset the Heating operation with the remote controller.
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Air Conditioner Service Manual
Electronic Controller
1. Safety Control
(1) Time Delay Safety Control
z 3 minutes delay for compressor---The compressor is ceased for 3minutes to balance the pressure in the
refrigeration cycle in order to protect the compressor.
z 2 minutes delay for 4-way valve---The 4-way valve is ceased for 2 minutes to prevent the
refrigerant-gas abnormal noise when the HEATING operation is OFF or switch to the other operation
mode.
(2) Indoor Pipe Temperature Sensor Frost Prevention Control
When the indoor pipe temperature sensor reads 32or below for 5 minutes, the indoor pipe temperature
sensor frost prevention control starts. The compressor and outdoor fan stop and indoor fan operates at high
speed for 3 minutes. After that, if the indoor pipe temperature sensor reads less than 41this control
prolonged until the indoor pipe temperature sensor reads 41or more.
(3) High Temperature Protection Control
During HEATING operation, the outdoor fan motor and compressor are controlled by the indoor pipe
temperature to prevent the high temperature of compressor.
Outdoor fan OFF: when the indoor pipe temperature is ı
Outdoor fan ON: when the indoor pipe temperature is İ118.4
Compressor OFF: when the indoor pipe temperature is ı
Compressor ON: when the indoor pipe temperature is İ118.4
2. “I Feel” Mode Operation
(1) When the “I Feel” mode is selected, the operation mode and initial set temperature are determined by the
initial room temperature at start-up of the operation except to turn off the air conditioner and operates it
again.
(2) If the mode is change to “I Feel” mode from other mode, the “I Feel” mode doesn’t operate until compressor
stop for more than 3 minutes.
z In the “I Feel” mode , when the controller receives the up or down single of temperature, the set
temperature can adjust by 33.8upper or lower. The biggest you can adjust by 35.6upper or lower.
3. “COOLING” Mode Operation
(1) When the COOLING mode is selected without setting temperature, the system will set the set temperature at
 automatically with the AUTO FAN speed.
(2) When selecting the COOLING mode operation, the system will operate according to the setting by the
remote controller and the operation is as following:
Mode Initial room temperature
COOLING
DRY
HEATING for Heat Pump Type
FAN for Cooling Only Type
 or more
 to 77
Less than 68
Initial set temperature


73.4


Room Temp.
Set TEMP. ˇ1.8
Set TEMP. ˉ1.8
Time More than 2 min More than 2 min More than 2 min More than 2 min More than 2 min
Indoor Fan Set Speed Set Speed Set Speed Set Speed Set Speed
Compressor ON OFF ON OFF ON
Outdoor Fan ON OFF ON OFF ON
4. “DRY” Mode Operation
(1) The system for DRY operation used the same refrigerant circle as the cooling circle.
(2) When the system operates in DRY mode ,at first it operates in cooling mode at  or  for 3 minutes.
And then, the system operates in cooling mode with low speed that regards the temperature of the room
temperature sensor reads decrease 35.6as the set temperature. During the course of this, the fan speed
set operation is failing but the vane motor can be controlled.
5. “HEATING” Mode Operation (Only available for Heat Pump)
(1) When the HEATING mode is selected without setting temperature, the system will set the temperature at
 automatically with the AUTO FAN speed.
(2) When selecting the HEATING mode operation, the system will operate according to the setting by the
remote controller and the operation is as following:
Set Temp. ˇ1.8
Set Temp. ˉ1.8
Room Temp.
Time More than 2 min More than 2 min More than 2 min More than 2 min More than 2 min
Compressor ON OFF ON OFF ON
Outdoor fan ON OFF ON OFF ON
(3) In HEATING mode, the indoor fan motor speed is controlled by Cold Air Prevention Control.
(4) Cold Air Prevention Control
z The function is intend to prevent cold air from being discharged when the heating operation starts or
when defrosting.
z The indoor fan speed will be controlled as following.
z The vane angle is at the angle C(100e).
SetSpeed SetSpeed
93.2

LowSpeed

LowSpeed
77
Stopthefan
73.4
Stopthefan
zDuring the heating operation, if the compressor stops that it will adjust the indoor fan speed, after 30
seconds to stop the fan.
Temperature raise
Temperature drop
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Air Conditioner Service Manual
(5) Defrost
Defrosting of the outdoor heat exchange is controlled by the microprocessor with detection by the indoor
pipe temperature sensor.
Defrost control type is according to the JC on the PCB whether is connected.
z When the JC is connect on the PCB
When one of the conditions of A, Band C is satisfy, the defrosting operation stars.
A. IPT--- indoor pipe temperature
In the condition A, it must satisfy the conditions a), b)and c) then into defrosting operation.
a) IPT1 satisfy IPT1=IPTMAXˉƸIPT˄˅
b) t5ı50minutes(the compressor cumulative operation timeı50 minutes, t5 is permitted move
and lower than t1 too).
c) IPT˘104ˈand keep 2 minutes.
According to the condition A enter the defrosting operation, the first defrosting operation time is
8 minutes; After defrosting operation one cycle, and then judge and regulate the defrosting operation
time.
B.After the compressor cumulative operation time exceeds 120 minutes and the temperature of the IPT
is less than for 2 minutes. When the defrosting operation time on this condition exceeds
8 minutes, it will terminate.
C.After the compressor operates continuously for 20 minutes and the IPT is less than 73.4or from
the last time of defrosting operation is 50 minutes or more interval. When the defrosting operation
time on this condition exceeds 10 minutes, it will terminate.
z When the JC isn’t connected on the PCB
When the conditions of a) or b) is satisfy, the defrosting operation starts.
a) Under the heating operation, the compressor cumulative operation time exceeds 50 minutes and the
temperature of the outdoor pipe temperature sensor reads lower than ˉ
b) Under the heating operation, the compressor cumulative operation time exceeds 50 minutes, if the
indoor pipe temperature sensor reads lower than 104continuously for 2 minutes.
Note: If haven’t the outdoor pipe temperature sensor that uses the condition b) to defrost, against
use the condition a).
z Defrost terminating conditions
When the condition c) or d) is satisfy, the defrosting operation will terminate.
c) The outdoor defrost sensor reads 68or more.
d) The defrosting time exceeds 10 minutes.

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Air Conditioner Service Manual
z Defrosting time chart
Outdoor Fan ON OFF ON
ReveringValve ON OFF ON
CompressorRelay ON OFF ON OFF ON
39S 5S Defrost Count MAX 12min 19S 15S t
6. “FAN” mode operation
The indoor fan motor always turns on at the set speed and the vane motor turns on at the set fettle.
7. 4-way Valve control
HEATING ON
COOLING/DRY OFF
The 4-way valve reverses for 5 seconds right before start-up of the compressor as following chart:
COOLING/DRY TO HEATING HEATING TO COOLING/DRY
Compressor
4-wayValve
5s 2min
Outdoor Fan
8. “SLEEP” mode
When the SLEEP button is pressed, the SLEEP mode is selected as following:
zThe indoor fan speed is set at the low speed, the power lamp and the sleep lamp is on, the temperature off
after 5 minutes.
zWhen selecting COOLING/DRY operation with SLEEP mode, the set temperature will be raised by 11
hour later and by  2 hour later.
zWhen selecting HEATING operation with SLEEP mode, the set temperature will be dropped by 1 1
hour later and  2 hour later.
zAfter the System operates in SLEEP mode for 8 hours, it will stop automatically.
9. Fan motor control
(1) Rotational frequency feedback control
The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the
microprocessor to feedback the rotational frequency. Comparing the current rotational frequency with the
target rotational frequency, the microprocessor adjusts fan motor electric to make the current rotational
frequency close to the target rotational frequency. With this control, when the fan speed is switched, the
rotational frequency changes smoothly.
(2) When the rotational frequency feedback signal has not output for 5 seconds (or when the microprocessor
can’t detect the signal for 5 seconds), the fan motor is regarded locked-up. Then the electric current to the fan
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Air Conditioner Service Manual
motor is shut off. 10 seconds later, the electric current is applied to the fan motor again. During the fan motor
lock-up, the POWER indicator lamp flashes on and off 6times/cycle or E6 to show the fan motor
abnormality.
10. Auto Fan Speed Control
(1) When the auto fan speed is selected, the indoor fan motor speed is automatically controlled by the room
temperature and the set temperature.
(2) In COOLING mode, the indoor fan motor operates as following:
Fan Speed
Hi
Me
Lo
Room temperature minus set temperature: 1
(3) In HEATING mode, the indoor fan motor operates as following;
FanSpeed
Hi
Mi
Lo
Roomtemperatureminussettemperature 1
11. Auto Vane Operation control
(1) Vane motor drive
The unit is equipped with a stepping motor for the vane. The rotating direction, speed, and angle of the
motor are controlled by pulse signal transmitted from indoor microprocessor.
(2) Positioning
The vane is once pressed to the vane stopper below to confirm the standard position and then set to the
desired angle. The positioning is decided as follows:
z When the ON/OFF button is pressed.
z When the vane control is change from AUTO to MANUAL.
z When the SWING is finished.
z When the test run starts.
z When the power supply turns ON.
(3) The auto vane changes as follows by pressing the VANE CONTROL button.
(4) VANE AUTO mode
In vane auto mode, the microprocessor automatically determines the vane angle and operation to make the
optimum room-temperature distribution.
(5) SWING mode
When presses the SWING button, the vane swings.
12. TIMER Operation
(1) To activate the air conditioner at the desire time, follow the procedure specified below(the remote control
and air conditioner are switched off):
z Press the Timer button.
z Select the desired mode by pressing the Mode button.
z Select the desired temperature by pressing the   button(only possible when the ‘cool’ or ‘heat’
mode is selected).
z Select the ventilator speed (low, medium or high) or automatic mode(only possible when the feel, Cool
or Heat mode is selected) by pressing the Fan button.
The ventilator always operates in the Auto mode when the Dry mode is selected.
z Select Swing or no Swing by pressing the Swing button.
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Air Conditioner Service Manual
z Press the Timer button(‘h’ flashes).
z Use the  button to select the time at which the air conditioner must activate (between 0 and 10
hours can be set at every half hour-between 10 and 24 hours can be set at every hour).
z Press the Timer button (‘h’ stops flashing) and the preset time appears in the display.
z Press the Timer button again to delete the selected data from the memory.
Note : If no buttons are pressed during the programming of the timer function, thee remote control will
switch off automatically after 10 seconds.
(2) To switch the air conditioner off at the desired time, follow the procedure specified below (the remote control
and air conditioner are switched off):
z Press the timer button.
z Use the  button to select the time at witch.
13. EMERGENCY Operation
When the EMERGENCY Operation switch is pressed once, COOLING mode is selected and if in 3 seconds the
EMERGENCY Operation switch is pressed again, mode is selected. Then pressed once again, the unit is switch
off.
When the remote controller is missing, has failed or the batteries run down, press the EMERGENCY Operation
switch on the front of the indoor unit. The unit will start.
The first 30 minutes of operation will be the test run operation. The operation is for servicing. The indoor fan runs
at high speed and the system is in continuous operation. The thermostat is ON and the timer is reset to normal.
After 30 minutes of test run operation the system shifts to AUTO COOLING/HEATING mode, and the indoor fan
runs in automatic speed. The operation continues unit the EMERGENCY operation switch is pressed or a button
on the remote controller is pressed and normal operation will start.
NOTE: Do not press the EMERGEMCY Operation switch during normal operation.
14. AUTO RESTART Function(Option)
1.When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan
speed are memorized by the indoor electric control PCB. The AUTO RESTART function sets to work the
moment power has restored after power failure. Then, the unit will restart automatically.
2. How to set the AUTO RESTAR function.
z Press the emergency switch and power supply to the PCB following, hold 10 seconds and the buzzer will
beep three times. The AUTO-RESTAR is set.
z Do the operation again, the buzzer will beep four times and the AUTO-RESTAR function is cancelled.
15. Failure Display and Handling
a) Failure Display
When the controller has failure, the buzzer will sound long for three times, and displays the failure from the
failure lamp.
b) Failure Code
If have the digital pipe that displays the failure code for digital pipe, or display for the run lamp.
Type of failure The lamp flash Display of digital pipe
The failure of room temperature sensor Once/cycle E1
The failure of indoor pipe temperature sensor Twice/cycle E2
The failure of indoor fan motor 6 times/cycle E6
c) Failure Handling
z When the room temperature sensor or the indoor pipe temperature sensor has a failure, the system will be
shut off, the compressor will be OFF, and the outdoor fan and the indoor fan will be OFF. The system
doesn’t receive the signal of remoter controller except the signal of shut off it. When the failure
disappear, the controller can operate in normal mode. before this, presses the “ON/OFF” to start the
system, and it will operate in COOLING or HEATING for 30 minutes, and follows shut off. During
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Air Conditioner Service Manual
this, it displays the failure and the protection is failing. You must power off/on to operate
it. In the failure, you can operate the FAN mode.
z When the outdoor protects in the COOLING or DRY, the outdoor unit stops, the indoor fan operates in
set speed ; and in the HEATING, the outdoor unit stops, the indoor fan operates in cold air prevention
control. The system doesn’t receive the signal of remoter controller except the signal of shut off.
When the system checks the voltage is 220V and the delay control is finished, it operates at normal
again.
z When the indoor fan motor is failure, the compressor is stopped, the outdoor fan and indoor fan is
stopped and display the failure. The system doesn’t receive the signal of remoter controller except the
signal of shut it off.
d) Display Of The Control
In the display board the lamp from left is the POWER lamp(Red), the SLEEP lamp(Yellow), the TIMER
lamp(Yellow), the RUN lamp(Green).
g) When it gives the control power, the buzzer sounds long for 0.3 second per cycle.


Wiring diagram
Model::<'$/-$5/:<'$/-$5/
Indoor unit
Outdoor unit


Wiring diagram
Model: :<'*/-$5/
Indoor unit
Outdoor unit


Wiring diagram
Model: :<'*/-$5/
Indoor unit
Outdoor unit


PioneerBrand,WYDSeries13SEERDuctlessSplitSystemHeatPumpEngineeringandServiceManual
Note:Pleasereadtheentireinstallationmanualpackedwiththeunitcarefullyandfollowallinstructions,during
andaftertheinstallation.Yoursystemhasbeenfullytestedandranproperlyforasufficientamountoftimeat
theassemblylinebeforeitwasapprovedandpackedforshipment.Allfunctionsandcomponentswereverified
tobeinperfectworkingcondition.Thereforeamajorityofproblemsanddeficienciesareusuallyduetocauses
otherthanafactorydefect.Seebelowforsomecommonproblems,reasonsandsolutions.Callusforanyother
issuesthatcannotberesolvedforfurtherassistancebyourengineeringsupport.Wecanonlyhelp,ifyouare
abletodescribethesymptomsproperlyandabletomeasureandadviseuscertainmeasurementssuchas
voltages,temperaturesandpressuresonthesystem.
Symptom:E1Errordisplayontheindoorunit.
Reason :IndoorUnit'sRoomTemperatureSensorOpenorShortedCircuit.
Solution:Checkforresistance.Ifmeasuringasopenorshorted,replacetheindoorunit'sroom
temperaturesensor(infrontofthecoil).

Symptom:E2Errordisplayontheindoorunit.
Reason :IndoorUnit'sHeatExchangerTemperatureSensorOpenorShortedCircuit.
Solution:Checkforresistance.Ifmeasuringasopenorshorted,replacetheindoorunit'scoil
temperaturesensor(onthecoilheader).

Symptom:E6Errordisplayontheindoorunit.
Reason :IndoorUnit'sMotorSpeedisoutofrange.RoughShipmentHandlingorDamagedMotor.
Solution:Checkformisalignedblowerwheel,rubbingandvibrationatthefanmechanism.Alignthe
blowerwheelinitscavityproperly,soitspinsfreelywithoutanyeffort.Checktheblowerbearingontheleft
sideoftheblowertoassureitissittingproperlyinitscavity.Checkthemotormountstoassuremotoris
properlymounted.IftheblowerisspinningfreelyandE6codeisstilldisplayed,changethefanmotor.Ifthis
doesnotresolvetheproblem,changetheindoorunit'scontrollercard.

Symptom:HEATModeismissingontheremotecontrolscreen.Remoteskipstheheatmode.
Reason :Remotecontrollerwaserroneouslysetupascoolingonly.
Solution:Resettheremotecontroller.Removeandreinsertthebatteries.Donottouchanybuttonsuntil
allflashingstopsandthescreenappearsfully.

Symptom:Indoorunitlightsareonandseemstowork,butoutdoorunitdoesnotrunatall.
Reason :Pairofthepowerwiresrunningbetweentheindoorandoutdoorunitareinverted.
Solution:For115VModels,assureBLUEwireisattachedtotheNterminalonboththeindoorand
outdoorsections.Likewise,assuretheBROWNwireisattachedtotheLterminalonboththeindoorand
outdoorsections.For230VModels,assureBLUEwireisattachedtotheL2terminalonboththeindoorand
outdoorsections.Likewise,assuretheBROWNwireisattachedtotheL1terminalonboththeindoorand
outdoorsections.Swappingthewiresattachedatthese2terminalsattheindoorunitshouldresolvethe
problem.Otherwisecheckforcontinuityforallwiresusedinyourinstallationforbrokenlinks.

Symptom:InHEATMode,outdoorcompressorrunsbuttheoutdoorfandoesnotrun.
Reason :SystemisinDefrostModeormissingwireconnection.
Solution:Checkiftheoutdoorcoilisicedupandthedefrostmodegetsterminatedwithinmaximum10
minutes.Otherwise,assurethattheREDwireisattachedtoterminal#2ontheoutdoorunit.Alsocheckthatthe
sameredwireiseitherconnectedtothe#2terminalontheindoorunit(009,012,018models)orthewhiteplug
attheendofthecableattheindoorsideispluggedwiththematchingwhiteplugontheindoorunitproperly
(for024modelsonly).Checkforvoltagebetween#2andNterminalson115Vmodelsandassureitreads115V
orcheckbetween#2andL2terminalson230Vmodelsandassureitreads230V(attheoutdoorunit'sterminal
block).


Symptom:InHEATMode,indoorunitisblowingcoldairinsteadofheating.
Reason :Missingwireconnection,defectivereversingvalveactuator.
Solution:Otherwise,assurethattheYELLOWwireisattachedtoterminal#3ontheoutdoorunit.Also
checkthatthesameyellowwireiseitherconnectedtothe#3terminalontheindoorunit(009,012,018
models)orthewhiteplugattheendofthecableattheindoorsideispluggedwiththematchingwhiteplugon
theindoorunitproperly(for024modelsonly).WhileinHeatMode:Checkforvoltagebetween#3andN
terminalson115Vmodelsandassureitreads115Vorcheckbetween#3andL2terminalson230Vmodelsand
assureitreads230V(attheoutdoorunit'sterminalblock).

Symptom:Bothindoorandoutdoorunitsrunbutthereisnoheatingorcooling.
Reason :Valveswerenotfullyopened,likesetiskinked,refrigerantwaslost.
Solution:Assurethatthesystemwasproperlyvacuumedbeforereleasingtherefrigerant.Assureboth
valvesontheoutdoorunitwerefullyopened.Assuretherearenorefrigerantleakatanyofthe4flare
connectionsattachedduringinstallation.Checkforpressurereadingincoolmodetobeapprox120PSIandboth
copperpipestobeverycoldandsweating.Checkforpressurereadinginheatmodetobeapprox400PSIand
bothcopperpipestobeveryhot.

Symptom:Inheatmodeoutdoorunitrunsbutindoorunitfandoesnotstartblowing.
Reason :SystemisinwarmStartMode.Ifextendedthiscanmeanrefrigerantloss.
Solution:Whenthecompressorfirststartsinheatmode,indoorfanisdelayeduntiltheindoorcoil
surfacegetshotenoughtoproducewarmairdischarge.Thefanstartsblowingoncetheindoorcoiliswarmed.
Thistakesmaximum1minute.Ifthisisextendedfurther,thancheckforoperatingpressuresandassurethe
systemhasnorefrigerantleaks.

Symptom:Systemdoesnotstartcoolingorheatingassoonasitisstarted.
Reason :Systemisinprotectiontimedelaymode.
Solution:Whenthesystemisstarted,thecompressordoesnotstartimmediately.Thereisa3minute
timedelayforprotection.

Symptom:Indoorunitseemstotallydead.Nolights.
Reason :Powerconnectionfromtheoutdoorunitisnotmadeproperlyorfusewasblown.
Solution:CheckforthevoltagebetweenLandNterminalsontheindoorunitsterminalblock(for115V
systems)toread115VAC.CheckforthevoltagebetweenL1andL2terminalsontheindoorunitsterminalblock
(for230Vsystems)toread230VAC.Checktheotherendofthesamewiresontheoutdoorunitforthesame
voltage.Assurethebreakerisnottripped.Ifthevoltageispresentontheindoorunit,fusemaybeblownonthe
controllercardoftheindoorunit.Replacewitha5Afuse.Orreplacethecontrolcard.

Symptom:Indoorunitfanrunscontinuouslyincoolingmode.
Reason :Thisisanormalandrequiredconditionprogrammedbytheinternalsoftware.
Solution:Indoorfanmustruncontinuallyincoolingmodetobeabletosampletheairtemperatureand
callforthecompressortocycleonwhenneeded.Thisisnormal.Indoorfanmotoroperatesononlyafew
penniesaday,soitwillnotwasteanysignificantamountofenergy,plusitwillprovideapositiveaircirculation
forbettercomfort.

Symptom:Indoorunitfancomesonandoffbrieflyinheatmode.
Reason :Thisisanormalandrequiredconditionprogrammedbytheinternalsoftware.
Solution:Indoorfanmustrunsonceinawhiletosampletheairtemperatureandcallforthecompressor
tocycleonwhenneeded.Thisisnormal.Unlikethecoolingmode,indoorfandoesnotruncontinuallyincooling
modetopreventcolsairdraft.Thetemperatureswingsinthespacebetweentheonandoffmodeswillbe
slightlyhigherthanthecoolingmode.


Symptom:Waterdrippingfromtheindoorunit.
Reason :Misalignedinstallationleveling,blockeddraintube,frozencoil.
Solution:Checkthattheindoorunitisinstalledinaperfectlyhorizontalposition.Checkthattheendof
thedrainhoseisdrippingwaterproperlyontheoutside.Checkthatthedraintubesarenotkinked,blockedor
siphoned.Assurethatthedrainhosestaysaslowaspossibleinthewallholeandhasacontinualproper
declinationinitslevel.Checktheevaporatorcoiliffrozen.Thiscanbetheindicationofrefrigerantlossfromthe
system.Checkandassurecorrectoperatingpressures.Checkforkinksincopperlines.Alwayscloseallopen
windowsanddoorstoavoidexcessivehumidityenteringtheroom.

Symptom:Excessivevibrationsfromthecompressorcarriedallthewaythroughthecoppertubing.
Reason :Excessiverefrigerantcharge,highpressure(usuallyinheatmode).
Solution:Checkforandobtainproperoperatingpressures.Reducetherefrigerantifovercharged.

Symptom:Frozenindoorcoil(CoolingMode)
Reason :Lowrefrigerant,dirtyfilters,dirtyevaporator,orverylowoutdoortemperature.
Solution:Systemcannotoperateincoolingmodeatoutdoortemperaturesbelow65Fwithoutinstalling
anoptionallowambientfancontrollerkit.Otherwise,checkforlowrefrigerant.Cleantheairfiltersand
maintainthemasclean.Cleanthecoilifneeded.

Symptom:Frozenoutdoorcoil(HeatingMode)
Reason :NormalOperation,Lowrefrigerant,dirtycondenserorverylowoutdoortemperature.
Solution:Duringtheheatingoperationtheoutdoorcoilwillnormallyfreezeonceinawhile.Thebuiltin
defrostlogicwillhandlethisanddefrosttheaccumulatediceasneeded.Maximumtimeallowedfordefrostis
10minutes.Inextremeconditions,thistimemaynotbeenoughtofullydefrostthecoilbutthesystemwillstop
defrostingandswitchtoheatingmodeagain.Additionally,systemcannotoperateinheatingmodeatoutdoor
temperaturesbelow15F,whichwillbeinefficientandcausesmorefrequentfreezingthannormal.Otherwise,
checkforlowrefrigerantchargeandmeasurethepressuresandobtainproperlevels.Cleanthecoilifneeded.

Symptom:Circuitbreakertripping
Reason :Damagedbreaker,lowerbreakeramperagethanneeded,compressoroverload.
Solution:Checkforthebreakertofunctionproperly.Alwaysuseproperlyratedbreakerfortherequired
amperage.Usepowerwireswithpropergaugetoallowfortheminimumrequiredcircuitampacity.Ifthe
breakerisstilltrippingfrequently,thisisasignofcompressoroverloadorelectricalshortage.Checkforblocked
capillarytubes,closedvalves,kinkedlineset,defectiveindoororoutdoorfanmotors.Loworexcessive
refrigerantcharge.Checkforwrongincomingpowervoltage.Nevershareanyotherapplianceordevicewith
thisheatpump,feedingpowerthroughthesamecircuitbreaker.

Symptom:Insufficientheatingorcooling
Reason :Lowrefrigerant,dirtycondenserorevaporator,defectivefanmotor.
Solution:Checkfortheindoorandoutdoorfanstobeproperlyrunning(fortheindoorfancheckathigh
speed).Checkfordirtordustaccumulatedontheheatexchangers,checkoutdoorunitsforblockagebydebris
orbeingsnowedin.Checkforlowrefrigerantcharge.Checkforvalvestobefullyopened.Checkforkinkson
coppertubing.Donotoperatethesystemincoolingwhentheoutdoortemperatureexceeds115Fandin
heatingwhentheoutdoortemperaturedropsbelow15F.Alwayslocatetheoutdoorunitawayfromdirectsun
shine,directwinds,heavywaterorsnowfallingover,bushesandotherobstaclesblockingtheairflow.

Symptom:Steam‐likeairblowingoutfromtheindoorunitairdischargeincoolingmode.
Reason :Veryhighhumidityconditionsintheroom.
Solution:Closeallwindowsanddoorstostophumidityenteringtheroomfromtheoutside.



Symptom:Systemdoesnotautomaticallyrestartafterapowerfailure.
Reason :AutoRestartFunctionhasbeenturnedOFF.
Solution:TurnOFFthebreaker,PressandholdtheemergencyrestartbuttonandturnthebreakerON
whilestillholdingthebuttonpressedfor10moreseconds.5beepsindicateactivationoftheAutoRestart
function.RepeattheprocedurefortuningOFFtheautorestartfunctioninnotdesired(Indicatedby3beeps).

Symptom:Indoorunitblowssmellyair.
Reason :Dirtyfiltersand/orevaporatorcoil.
Solution:Cleanthefilters.Ifthecoilisdirtyhavetheevaporatorprofessionallycleaned.Runtheunitfor
severalhoursinFANONLYmodetodryitbeforepreparingtoleavethesystemOFFforlongperiodsoftime.

Symptom:Uncomfortablywidetemperatureswingsintheroom.
Reason :Indoorunitinstalledtoohigh,filtersdirty,Roomtemperaturesensordeficiency.
Solution:Higherlocationsintheroomwillhavewarmertemperaturesandthesystemwillmeasurethe
temperatureattheheighttheindoorunitisinstalled.Usercancompensateforthisbysettingthetemperature
settingsslightlylowerorhigherthanactuallydesired.Cleanthefiltersweeklyforbestperformance.Checkthe
returnairsensorandreplaceifneeded.

Symptom:Systemdoesnotrespondtocommandsfromtheremotecontroller.
Reason :Remoteislocatedfaraway,weakremotebatteries,disconnecteddisplayboard/
Solution:Placetheremotenearbyandretry.Replacethebatteries.Checktheconnectioncablebetween
thedisplayboardandthemaincontrollerboard.
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Electrical/WiringDiagnostics:
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1.110‐120VACModels:
a. CheckthevoltagebetweentheLandNterminalsontheindoorunit.Itshouldbealways110~120V.
b. CheckthevoltagebetweentheLandNterminalsontheoutdoorunit.Itshouldbealways110~120V.
c. CheckthevoltagebetweentwoLterminals(leftandright)ontheoutdoorunit.Itshouldalways0V.
d. Forthecompressortorun,thevoltagebetweenthe1andNterminalsatBOTHtheoutdoorandindoor
units'terminalblocksmustbemeasuredas110~120VAC.
e. Fortheoutdoorfanmotortorun,thevoltagebetweenthe2andNterminalsatBOTHtheoutdoorand
indoorunits'terminalblocksmustbemeasuredas110~120VAC.
f.Fortheheatmodetobeactivated,thevoltagebetweenthe3andNterminalsatBOTHtheoutdoorand
indoorunits'terminalblocksmustbemeasuredas110~120VAC.
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2.208‐230VACModels:
a. CheckthevoltagebetweentheL1andL2terminalsontheindoorunit.Itshouldbealways208~230V.
b. CheckthevoltagebetweentheL1andL2terminalsontheoutdoorunit.Itshouldbealways208~230V.
c. CheckthevoltagebetweentwoL1terminals(leftandright)ontheoutdoorunit.Itshouldalways0V.
d. Forthecompressortorun,thevoltagebetweenthe1andL2terminalsatBOTHtheoutdoorandindoor
units'terminalblocksmustbemeasuredas208~230VAC.
e. Fortheoutdoorfanmotortorun,thevoltagebetweenthe2andL2terminalsatBOTHtheoutdoorand
indoorunits'terminalblocksmustbemeasuredas208~230VAC.(#2isnotaccessiblefor024Indoor).
f.Fortheheatmodetobeactivated,thevoltagebetweenthe3andL2terminalsatBOTHtheoutdoorand
indoorunits'terminalblocksmustbemeasuredas208~230VAC.(#3isnotaccessiblefor024Indoor).
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PipingSurfaceTemperatureDiagnostics:
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a.InCoolingmode,thesmallerdiameterpipemustfeelVeryColdandthelargerdiameterpipemustfeelCold.
b.InHeatingmode,thesmallerdiameterpipemustfeelHotandthelargerdiameterpipemustfeelVeryHot.
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