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Message Model No.Serial No.Write down the model and serial numbersThe model and serial numbers can be found on the room sideof the chassis basepan. Use these numbers in anycorrespondence or service calls concerning this airconditioner.Installation & Operations ManualPackaged Terminal Air ConditionerTable of ContentsImportant Safety InformationChassis InstallationDIP Switches / Remote Thermostat Interface1Control and Unit FeaturesFilters / MaintenanceTrouble ShootingThis Installation Guide and Operations Manual providesThe chassis should be the final component in theinstallation process. Prior to this installation you mustcomplete wall sleeve installation, rear grille installation,condensate drain installation (optional), and sub-baseinstallation, (if applicable). Please refer to the instructionsprovided with the individual components.Keep these instructions for future reference. information for PREM Packaged Terminal Air Conditionerand Packaged Terminal Heat Pump units designed forthrough the wall installation in new or existing buildingsincluding hotels, motels, apartments, hospitals, nursinghomes and room additions. Components / Power Cord Connection23571315Note: Performance may be reduced outside of these operating temperatures.Operation10
CAUTIONImproper installation or use of components notdesigned or approved for use with this unit can result inunsatisfactory operation and can cause failure notcovered by the warranty.1WARNINGElectrical Shock Hazard• Use only grounded electrical supply.• Do not use an extension cord or plug adapter with thisunit.• Do not operate unit with decorative front or filterremoved. • Failure to follow these precautions could result inelectrical shock, fire, personal injury, or death.• If the air conditioner has a serial plate rating of 115 voltsand greater than 7.5 amps, it must have its own fuse orcircuit breaker, and no other device or unit should beoperated on that fuse or circuit breaker. If the airconditioner has a serial plate rating of 208/230 volts, itmust have its own fuse or circuit breaker, and no otherdevice or unit should be operated on that fuse or circuitbreaker.• This unit must be installed by a qualified HVACR installerin accordance with the National Electrical Code and localcodes and ordinances.• Do not operate this air conditioner without proper timedelay circuit protection (circuit breaker or fuse). Refer toserial plate for proper power supply requirements.• Use copper conductors of correct wire gauge andprotector size only.Additional Safety Precautions • Do not store or use gasoline or other flammable vaporsand liquids in the vicinity of this or any other appliance.The fumes can create a fire hazard or explosion.• Do not introduce objects in the air discharge area. Thiscould cause permanent damage.• Do not pour liquids on the air conditioner as this couldcause a malfunction. With the unit unplugged, use adamp cloth for cleaning the unit.• Do not use strong solvents to clean the air conditioner. • Clean the air conditioner filter every two weeks to avoidoverheating caused by air obstruction. Do not operatewithout filter.• Do not cut, alter or remove any of the expandedpolystyrene (styrofoam) inside this air conditioner.• Do not obstruct the air intake area of your airconditioner, as this could cause overheating, thusactivating the unit’s security switch and shutting off theunit.• Do not block air circulation to outside louvers of cabinet.• Do not block air flow inside with blinds, curtains, orfurniture, or outside with shrubs, enclosures, or otherbuildings.• Do not run the air conditioner with an outside protectivecover in place. This could result in fire or mechanicaldamage within the air conditioner.• Your air conditioner may weigh as much as 95 pounds. Toinsure safe handling, obtain the necessary help to liftand position the unit during installation and removal.• Handle air conditioner with care. Wear protective glovesand back brace whenever lifting or carrying the unit.• Carefully inspect the location where the air conditionerwill be installed. Be sure it will support the weight of theunit over an extended period of time.WARNINGUNIT MUST BE INSTALLED BY A QUALIFIED ELECTRICIAN.IMPROPER ELECTRICAL WIRING CAN CAUSE PROPERTYDAMAGE, SEVERE PERSONAL INJURY OR DEATH.WARNINGTHESE INSTRUCTIONS ARE INTENDED AS AN AID TOQUALIFIED SERVICE PERSONNEL FOR PROPERINSTALLATION AND OPERATION OF THIS UNIT. READTHESE INSTRUCTIONS THOROUGHLY BEFOREATTEMPTING INSTALLATION OR OPERATION. FAILURE TOFOLLOW THESE INSTRUCTIONS MAY RESULT INIMPROPER INSTALLATION, ADJUSTMENT, SERVICE ORMAINTENANCE, POSSIBLY RESULTING IN FIRE,ELECTRICAL SHOCK, PROPERTY DAMAGE, PERSONALINJURY OR DEATH.SAFETY SYMBOLS, WORDS AND LABELSWhat You Need To Know About Safety InstructionsWarning and Important Safety Instructions appearing inthis manual are not meant to cover all possibleconditions and situations that may occur. Common sense,caution and care must be exercised when operating orcleaning tools and equipment.Always contact your dealer, distributor, service agent ormanufacturer about problems or conditions you do notunderstand.DANGER indicates an imminently hazardous situationwhich, if not avoided, will result in death or seriousinjury.This is the safety alert symbol. It is used to alert youto potential personal injury hazards. Obey all safetymessages that follow this symbol to avoid possibleinjury or death. WARNING indicates a potentially hazardous situationwhich, if not avoided, could result in death or seriousinjury.CAUTION indicates a potentially hazardous situationwhich, if not avoided, may result in minor or moderateinjury.CAUTION used without the safety alert symbol indi-cates a potentially hazardous situation which, if notavoided, may result in property damage.DANGERWARNINGCAUTIONCAUTIONImportant Safety Information
Components / Power Cords ConnectionComponents and Required AccessoriesPower Cord ConnectionTandem15 AmpPerpendicular20 AmpLarge Tandem30 Amp230/208 volt receptacle configurationDepending on resistance heat requirements,a power supply kit with LCDI must be usedto supply power to this unit.The appropriate power cord kit is determinedby the voltage, the amount of resistance heatrequired, the ,means of electrical connectionand the amperage of the branch circuit.Power supply kit(Apperance may vary)2600Models with universal heaters are shipped without powercords. You will need to order a seperatepower cord kit.For models with universal heaters, you will need to select your power cord kit as follows:* Shipped with the chassis** Check essential components list on chassis*** Appearance may varies between modelsapplications need to be factory approved.void warranty. Any sleeve extensionFailure to install correct rear grille willsleeve for unit to operate correctly.grille must be installed onto the wallmaximum performance. Correct rearRear grille is designed to achievepurchased separately)Rear grille (Standard or Architectural)2
Prepare the Chassis for InstallationUnlatch the decorative front from the chassis bygrasping it at the lower corners and pulling forwarduntil the retaining clips release. If decorative front isdifficult to remove press in the left and right sides torelease the retaining clips. Lift the decorative front offand set aside.Lift the decorative front off and set asideSlide the Chassis into the Wall SleeveInsert the chassis into the wall sleeve and slide forwarduntil the chassis flanges contact the front edge of thewall sleeve and unit is firmly seated against the foam111112113NOTEBefore installing the chassis, make sure you haveinstalled the rear grille, condensate drain, wallsleeve, and sub-base (if applicable).3Retaining clip(press here)Chassis flangeFront edge of wall sleeveWARNINGSwitch off power at the service panel beforeinstallation. Lock or tag the area to prevent powerfrom being switched on accidentally. Chassis InstallationFresh Air Intake Control (PTW Series Only) weather seals at the back of the wall sleeve.Fresh air intake system is available for the PTW models.This function allows the intake of fresh air from outsideinto the room.behind the decorative front, in front of the control box.Turning on this system may reduces heating or coolingeffectiveness and increase operation costs.Fresh air functionturn ON or OFFdip switch.To turn on this system, use the dip switch located
Secure the ChassisSecure the chassis to the wall sleeve using two screwson each side of the chassis to ensure a proper sealbetween the chassis and the wall sleeve.Make all wiring connections before reinstalling thedecorative front.Ensure that the unit is installed completely intothe sleeve. Inspect the seal between the condenserair baffles and around the indoor mounting flange.In some cases additional gaskets or baffling maybe necessary.Changing Discharge Airflow Direction (optional)Air conditioner louver inserts are reversible and canbe reoriented to change the discharge airflow directionfrom the factory set angle of 37°to an upward angle of20°(from the vertical plane).To change the discharge airflow direction:From the inside of the decorative front, remove the tworetaining screws that attach the louver insert and rotatethe louver insert 180°Finally, replace the screws andthe decorative front.Install Decorative FrontAttached decorative front at the top and swing down overunit making sure that the retaining clips on the sidesof the decorative front engage with the attachment pointson the chassis.NOTEScrewsRetaining clipAttachmentpoint4
DIP Switch controls / Remote thermostat interfaceSetting the Control DIP SwitchesSwitches are provided to access the built in controls. Settingthese switches will allow you to customize the features ofThese switches are located behind the decorative front,in the front of the control box.your PTAC unit. Fresh air system (Enable / Disable) PTW Series OnlyThis switch enables or disable the fresh air system.When turned on, the fresh air system will bring in different volume of freshair from the outdoor into the room depending on the selection setting of fixed orautomated fresh air intake.Reverse cycle heat pump (Enable / Disable)This switch enables or disable the reverse cycle heat pump heating function.When turned on, reverse cycle heating is enabled.Activiting this mode allows higher energy savings in comparison to resistance heating.Resistance heat (Enable / Disable)This switch enables or disable the resistance heat function.When turn on, electric heating is enabled.This mode is recommended for extreme low outdoor ambient condition.Automated dehumidification function (Enable / Disable)DIP SwitchesRemote thermostat interfaceOFFON1ON2345678OFFON1ON2345678OFFON1ON2345678OFFON1ON2345678OFFON1ON2345678Room freeze protection (Enable / Disable)This switch is used to turn on the room freeze protection function.In the cold season, when this function is activated, the unit will ensure the roomtemperature does not go below 50 degree fahrenheit.OFFON1ON2345678Power off automatic restart (Enable / Disable)This switch is used to enable the function of electrical power off automatic restart.When there is an electrical power interuption, turning on this function allowsthe unit to restart automatically when the electrical power comes back on.The unit will operate base on the last known setting of the unit before the electricalpower is interupted.OFFON1ON2345678Reserved5**This switch enables or disable the automated dehumidification function when Fresh airWhen turned on, unit will enter into automated dehumidification when the room PTW Series Onlysystem is used.humidity is higher then 60 RH. It will keep the room humidity below 60 RH;% %* Heatpump Models Only (Selection of Reverse Cycle Heating or Electric Heating)at the same time, fulfill Cooling/Heating demand.Turning on this system may increase operation costs.(See operation section for fresh air intake settings.)
DIP Switch controls / Remote thermostat interfaceOFFON1ON2345678UV-C lamp operation (Enable / Disable)When a remote thermostat is connected to the unit, the indoor air temperature sensing is shifted from the unit to the remote thermostat. Due to this, the unit operational respond will be slightly different then the unit operated withoutremote thermostat.To transfer the unit control from the unit touchpad to the remote thermostat, press the MODE button and the buttonat the same time for 5 seconds. The display will show symbol. You have transfer the control to the remote thermostat.Remote thermostat interfaceRFD GHB Y WGLC24VacFD ControlHigh fan speedReversing valveCompressorHeaterLow fan speedCommon groundThis switch is used to enable or disable the use of the UV-C lamp.When this function is enabled, the unit control panel can turn the function of the UV-C lamp ON or OFF.NOTEThe remote thermostat interfaceconnections provides 24Vac only.Improper connections will damagethe unit electronics.Special care must be used inconnecting the wires.No line voltage connectionsshould be made to any circuit.Isolate all wires in building fromline voltage.When the control is with the units touch pad, the display will show symbol.6NOTEFront Desk Control1. Connect the control wire to R(24V) and FD port in the main board Remote thermostat interface.2. Unit will consider the signal as of “close-open-close” or "close-open-close" as ONE valid signal.3. When unit receive ONE valid signal within 5 seconds, the unit will be turned ON.4. When unit receive TWO valid signal within 5 seconds, the unit will be turned OFF.5. When the connection of R and FD closed more than 5 seconds, the unit will be forced to turn OFF. 6. Depending on the FD control system you used, the operation might be different, please referred to your FD control systemmanual before operating the unit.
OperationPower ControlThe Power Control turns the unit ON and OFFIf the electronic controls do not respond to touch pad, please unplug the unit from the electricaloutlet for five seconds and then plug the unit back in.Built-in three minute timing delay: the compressor will not restart for three minutes.Control PanelThe control panel is located on the right side of the unit. Use the control panel to power unit ON/OFF, select mode, select fanDisplayThe digit display shows the actual indoor room temperature when the unit is in normal operation.The Indoor Temp display will light up.When either one of the up arrow or down arrow is pressed, the digit display will start blinking,the Indoor Temp display will turn off, the Set Temp display will light up. You can raise or lowerOnce temperature is set, without any buttons activity, the digit display will stop blinking after5 seconds and shows the actual indoor room temperature. The Set Temp display will turn off and the Indoor Temp display will light up.the set temperature.NOTEYou can switch the digit display to show temperature in degree Fahrenheit or degree Celsiusby pressing the arrow up and arrow down buttons together for 3 seconds. This will switchthe digital temperature display to show temperatures in degree Fahrenheit or degree Celsius.Default factory setting for temperature display is degree Fahrenheit.Mode ControlThe MODE button sets the different operation available to this unit.Cool Mode The unit will circulate and cool the air.Fan Mode The unit will only circulate the air.Heat Mode (Heat models only) The unit will circulate and heat the air.Heater Safety Feature-When using electric heat for heating, low fan speed is disabled for better heatingWhen electric heat is powered off, indoor fan will stay on for 15 seconds to ensureDry Mode The unit will dehumidify the air.the removal of residual heat in the unit. This is only applicable when dip switch setting7speed, adjust the set temperature and select fresh air function (only on PTW series).performance.7 (Fan continuous operation in heating) is in the Disabled (OFF) position.On/OffPTW and Inverter seriesSTW series
OperationFan Speed ControlThe FAN button selects the different fan speed available to this unit.Med Fan The unit fan runs in medium speed.Auto Fan When Auto Fan is selected, the unit fan speeds will change automatically as the.High Fan The unit fan runs in high speed.Low Fan The unit fan runs in low speed.temperature in the room changes.Special Fan Speeds-When in DRY Mode, fan speed always stay on low for fixed speed units.When in electric heater is turned on, low fan speed is not available.Auxillary ControlsCombination button functionsWhen unit is in operational, press ARROW UP button + FANTemperature setting limitsbutton together for 5 seconds allows you to select the range ofoperational temperature on the unit per the table on the right.Use ARROW UP and ARROW DOWN button to selectDefault factory setting is R8.operational ranges R1 to R8.+8For inverter unit, when in DRY Mode, fan speed may varies between low and medium.Fresh Air Control PTW Series OnlyTurning on this system may reduces heating or cooling effectiveness and increase operation costs.NOTE*Automatic dehumidification function (selectable only with Fresh air function)The automatic dehumidification function can be selected from the dip switch setting located on the front of the unit, behind theWhen the automatic dehumidification function is turn ON, the unit will keep the room humidity constantly below 60 % relative humidity.Cooling / Heating requirements will be met first before the automatic dehumidification function comes into effect.decorative front panel.LED indicatorFresh air automaticFresh Air Control, Automatic mode*The FRESH AIR system can only be turned on by Dip Switch 1 located behind the decorative front,in the front of the control box.When the FRESH AIR system is turned ON, the unit will bring in fresh air from the outdoor intothe room. You can set fixed amount of fresh air or select automatic fresh air intake.The fresh air system has a variable speed fan, a vent door and an electric pre-heater asstandard configuration. Optional air quality features are available. Contact your dealer, distributor,service agent or manufacturer for details.Once automatic mode (display shows FA) is selected, the vent door opens and the automatic fan brings in different volume of fresh airfrom the outdoor depending on the indoor humidity, outdoor humidity and outdoor ambient temperature. The pre-heater will comes onautomatically when there is a need to pre-heat the outdoor air before bring into the room.Fresh Air Control, Manual modeYou can set fixed amount of fresh air coming into the room. You can set fixed 20 CFM to 70 CFM at increment 5 CFM. When DipSwitch 1 is enabled, upon power to unit, press and hold the “On/Off” button for 5 seconds. Display will show F4 (defaultfactory is 40 CFM); toggle the up and down button to select required fresh air intake. FA (automatic), F2 (20 CFM),25 (25 CFM), F3 (30 CFM), 35 (35 CFM), F4 (40 CFM), 45 (45 CFM), F5 (50 CFM), 55 (55 CFM), F6 (60 CFM), 65 (65 CFM), F7 (70 CFM).Once you finish your selection, the controller will store your selection automatically after 5 seconds.Note: Selection display will only show FA, F2, 25, F3, 35, F4, 45, F5, 55, F6, 65, F7 during setup.NOTE1ON2345678
OperationUltra Violet Lamp Module (Optional UV Module)The UV button turns the automated ultra violet lamp ON and OFF.When the UV lamp is turned on, the air brought into the room will be sterilized.The UV module comes with a UVC lamp hidden in a special air duct to be installed across the front of the unit.9For details, please contact your dealer, distributor, service agent or manufacturer for details.LED indicatorUV lamp is hiddenwithin this compartmentWARNINGThis appliance contains a UV-C LAMP.Read the maintenance instructions before opening the appliance.It is recommended to check and service the UV-C lamp every six months. You will need a qualified servicer in accordanceThe UV-C lamp is made of crystal glass. Please handle with care and caution.Unintended use of the appliance or damage to the housing may result in the escape of dangerous UV-C radiation. Appliances that are obviously damaged must not be operated.The appliance must be disconnected from the supply before replacing the UV-C LAMP.UV-C BARRIERS bearing the ULTRAVIOLET RADIATION hazard symbol should not be removed.The UV-C lamp replacement part number is SP-UVC001. Please contact your dealer, distributor, service agent orThis UV-C GERMICIDAL LAMP SYSTEMS is approved for use with all models of STW and PTW.Do not operate UV-C LAMPS outside of the appliance.•with the National Electrical Code and local codes and ordinances.UV-C radiation may, even in small doses, cause harm to the eyes and skin.manufacturer for the correct service part replacements.••••••••••LCD indicatorConstantFan continuous operation in heating and cooling (Enable / Disable)This button is used to enable the function of the indoor fan continuous operation inheating and cooling mode.When this function is enabled, the unit indoor fan will run continuously.When this function is disabled, the indoor fan will cycle on and off when necessary inheating or cooling mode.PTW and Inverter seriesSTW seriesUV OnUV UVFan
Control and Unit FeaturesPrem's PTAC has a state of the art features to improve guest comfort and conserve energy at the same time.Through the use of a specifically designed control software, a quiet, dependable and easy to use PTAC is produced.Below list the standard features on every Prem PTAC and their benefit to the owner.Large digital temperaturereadoutLarge, easy to read LED display can shows either set-point or actual room temperature as selected by owner.Sensor touch display Unit is equipped with human sensor touch button.A light touch to activate or de-activate your selections.Multiply fan speed selectionsThis unit features multiple fan speeds.High, medium, low and auto fan.Auto fan mode provides the user a hassle free comfortable ventilation option that delivers quiet acoustics performance.Multiple sensors. Our standard unit comes with 4 build in sensor to ensure proper operation of the unit. These are indoor coil thermister, outdoor coil thermister, indoor air thermister and outdoor air thermister.With the 4 sensors, the unit will always operates in its most ultimate capability.On our advance Fresh Air units, the sensor numbers increases to 8 for ultimate performance. This includes direct reading humidity reading for both indoor and outdoor ambient.Low noise startup and shutdown.The indoor fan advance startup and delayed stoppage prevent abrupt changes in room acoustics due to the compressor and outdoor fan turning on.Upon the need for cooling or heating, the indoor fan will startup in advance prior to the the compressor and outdoor fan turns on.The delayed indoor fan off allows for “free cooling” and system balancing by utilizing the already cooled indoor coil for maximum performance.Clean filter warning Unit comes standard with a build in timer to count operation hours. It provide end user a reminder to clean the filters to ensure the unit has a more efficient operation and durable.Error code storage for service.All error codes occurred, are stored in the memory of the controller.Stored error codes can help properties determine if the unit is operating properly.It also help servicer to pinpoint unit fault for a quick repair.Temperature limiting feature.By limiting the operating range of the unit, properties can save energy by limiting the range of cooling or heating operation.There are 8 ranges to select from.Room freeze protection This feature adds comfort to the end user.When the unit keeps the room in the range of 50° F to 55° F.This feature prevents unoccupied rooms to freeze up and cause damage to plumbing and fixtures..10
Control and Unit FeaturesPrem's PTAC has a state of the art features to improve guest comfort and conserve energy at the same time.Through the use of a specifically designed control software, a quiet, dependable and easy to use PTAC is produced.Below list the standard features on every Prem PTAC and their benefit to the owner.Automatic switch betweenelectric heat and reverse cycle heating.Heat pump models with electric heat will always run first cycle in electric heat. This is to quickly bring the room up to set temperature when heat mode is selected.This adds comfort to the occupant.The following cycles will switch automatically to reverse cycle heating.In freezing ambient conditions, the unit will automatically switch to electric heat instead of reverse cycle heater. This is to elevate occupant comfort level.Fan continuous run feature. You can choose between fan cycling or fan continuous mode.Fan continuous mode is used to keep constant airflow circulation in the room at all times.Fan cycle will conserve energy by only operating the fan while the compressor or electric heater is in operation.Electric heat only in heatpump units.Our heat pump units comes standard with electric heat.In the event of a compressor failure in reverse cycle mode, you can switch to electric heat function only for heating.This feature ensures that even in the unlikely event of a compressor failure you still get heating until the compressor can be serviced. Advance rotary compressors.High efficiency rotary compressors are used on all our products.This is to maximize durability and efficiency at ultimate cost.Aluminum coil endplates. Aluminum endplates for the coils are used.This reduces the risk of corrosion and water staining on build face after long operations.Antimicrobial air filters Standard air filters used are anti-microbial treated.This prevents mold and bacterial formations.These filters are washable and reusable and are easily accessible in the front of the unit.Universal heater on Fresh Air units.Our Fresh Air units comes with universal heater.You can select between 5kW to 2.6kW electric heat with the switch of a powercord.Pre-treated fresh air. Our Fresh Air units with our patented fresh air design ensure allair brought into the room are pre-treated. Even in the cold extreme winter. The additional 1kW electric heater will pre-warm the fresh air before delivery into the room.IAQ options on Fresh Air units.Our Fresh Air units comes with allocations for Merv filters, HEPA filters, UV sterilization lamps and electrostatic filter plates.All IAQ products can be adapted into our unit.11
Control and Unit FeaturesPrem's PTAC has a state of the art features to improve guest comfort and conserve energy at the same time.Through the use of a specifically designed control software, a quiet, dependable and easy to use PTAC is produced.Below list the standard features on every Prem PTAC and their benefit to the owner.Automatic dehumidification. Our Fresh Air units comes with an automatic dehumification function. With our direct reading humidity sensors, we can maintain the room to be within the comfort zone of 40-60% humidity. This is automatically achieved by the unit controller. It shift operation between cooling or heating, dry mode or varies the fresh air intake to minimize humidity brought into the room.Thus keep the room to a 40-60% humidity comfort zone.Separated inverter module. Our Inverter unit design has a separate compressor driver PCBA. This ensure more stable operations. It also allow separate operations but perform together to provide a superior variable compressor operation. Thus providing even more comfort to the room occupant.Random compressor startupMultiple units starting at once can cause electrical overloads.This random compressor startup feature prevents a power outage upon an power outrage recovery,Adaptive thermostat connectivity.Our unit comes with standard thermostat connections.You can connect or adapt any off the shelf thermostat with our unit.Future units will have occupancy sensor connectivity.12
Maintenance And CleaningFilters / MaintenanceMonthly Maintenance And CleaningInstallation Clearance CheckWARNINGHIGH VOLTAGE.FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE,DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLINGTHIS UNIT. MULTIPLE POWER SOURCES CAN BE PRESENT.PERSONAL INJURY OR DEATH.To properly maintain the operational performance of your PTACunit, it is extremely important that regular cleaning of the unit isperformed.Air FiltersShould be checked and cleaned every 2 weeks.These includes Intake Air Filter and Fresh Air Filters.(Refer to filter cleaning section.)Decorative Front PanelThe decorative front panel and its discharge grille can be cleanedwith a water dampened cloth.Under no circumstances shouldhydrocarbon-based cleaners (example: acetone, benzene,naphtha gasoline, etc.) or ammonia based cleaners be used to cleanthe front or air grilles. Use care when cleaning the control area.Yearly Maintenance And CleaningTo achieve continuing top performance and high efficency,establish a routine cleaning/inspection schedule for the unit.Take the unit out of the sleeve and thoroughly clean the unit.Use a mild biodegradable detergent when cleaning the unit.Special care must be taken to protect the unit's control boardand other electrical components from getting any water on themwhen cleaning.Wall SleeveCelan the wall sleeve when cleaning the unit. Check thecaulking around the sleeve to ensure that any potential airand water openings are properly sealed.Condenser CoilThe coils on the outdoor side of the unit should be checkedregularly to see if they are clogged with dirt or soot.They should be cleaned by either low or no pressure cleaningmethods. Ensure that electrical area/devices are protectedduring cleaning.Base Pan and Outdoor FanRemove any large particles that are in the base pan manually.Create a water tight seal protection around the controlpanel area and also around the outdoor motor. Use lowpressure or no pressure water hosing to clean base pan andoutdoor fan blade. Ensure water do not get into electricalareas.Use a mild biodegradable detergent to clean if needed.Ensure you rinse clean with water after using detergent forcleaning. Tilt unit and allow water to drain out from theside of the unit. Remove excess water left in drain pan bywiping with a dry cloth. Remove all electrical protectionpreviously put in place. Allow the unit to dry for 24 hoursbefore reapplying power to the unit.After cleaning the unit, when reinstalling the unit, clearancearound the unit should be rechecked. Ensure the intake air anddischarge air paths are not blocked or restricted. A clearanceof minimum eight inches is needed from unit to funiture, beds,or other objects for proper operation.Restricted discharge or intake air will reduce the unit'soperational performance. In severe airflow restrictions damagecan occur to unit components such as the compressor, electricheater or fan motors.Normal Operating SoundsWater trickling soundWater is pick up and distributed over the coil by the outdoorfan. This improves the efficency and helps with water removal.Water dripping soundWater will collect in the base pan during high humidity days.This can cause overflow and drip from the outside of the unit.Air soundThe indoor fan will run continously when the unit is turned on.When auto fan is selected, the indoor fan will cycle on andoff with the compressor or electric heat.Compressor start delayCompressor has a 3-minutes delay startup if you try to restartthe unit too soon.Relay click soundYou may hear relays click sound when the controls cycle on andoff or are adjusted to change the room tempearture.Unit turn ON but silentThis unit has defrost cycles to protect the indoor and outdoorcoil from freezing. During the defrost operations, both indoorand outdoor fan may stop operating. After the defrost cycle, unit will resume its normal operations.13
Intake Air FiltersWhen air conditioner is operating, indoor air is filtered andrefiltered continuously trapping airborne dirt and dust inthe washable filter. The air intake filters are removable foreasy cleaning. A clean filter helps remove dust, lint, andother particles from the air and is important for bestcooling and operating efficiency. Check the filter every twoweeks to see whether it needs cleaning.1. Turn unit off.2. Remove each air filter by grasping the top edge of thefilter frame and pulling each one up and out of the unit. 3. Wash in hot soapy water, rinse and shake dry.4. Replace the filter, with the front of the filter toward you.5. To dry the filter thoroughly, run your unit for a fewminutes in fan mode. CAUTIONFailure to keep air filter clean will result in poor air circulation..CAUTIONDO NOT dry filter in heat mode.Filters / MaintenanceFresh Air Intake Filters PTW Series OnlyWhen fresh air function is enabled, outdoor air brought indoor airborne dirt and dust in the 2 washable filters.These 2 filters are removable for easy cleaning.A clean filter helps remove dust, lint, and other particlesis important for the best function of the unit.1. Turn unit off.2. Remove filter by grasping the top edge of the filterframe and pull it out of the unit. 3. Wash in hot soapy water, rinse and shake dry.4. Replace the filter, with the front of the filter toward you.is filtered and refiltered continuously by 2 filters, trappingFresh Air Intake Filter (Indoor)5. To dry the filter thoroughly, run your unit with freshair system enabled for a few minutes in cool, dry or fanmode.6. Check this filter every 2 weeks to see whether it needscleaning.1. Turn unit off.3. Remove filter by grasping the top edge of the filterframe and pull it out of the unit. 4. Wash in hot soapy water, rinse and shake dry.5. Replace the filter accordingly.Fresh Air Intake Filter (Outdoor)6. To dry the filter thoroughly, run your unit with freshair system enabled for a few minutes in cool, dry or fanmode.7. Check this filter every 4 weeks to see whether it needscleaning.2. Pull the unit out of the wall sleeve.NOTEbe replaced immediately.DO NOT operate without filters. This can render the unitinoperative. If a filter becomes torn or damaged, it should14*Unit comes with a build-in clean filter warning.To clear the CF warning display, press MODE FAN CAUTIONDO NOT dry filter in heat or cool mode.Display will show CF to remind user to clean the filters.button together.+FrontPull outAir filterPull upAir filterBack
Troubleshooting15Diagnostic Error Codes (For all units)This unit come with its own diagnostic error codes. This is to assist in determining the fault of the unit.Error codeon displayError contentE1 or o1 Fresh air motor failure.E2 or o2 Indoor air temperature sensor failure.E3 or o3 Indoor coil temperature sensor failure.E4 or o4 Indoor fan motor failure.E5 or o5 Outdoor coil temperature sensor failure.E6 or o6 Outdoor air temperature sensor failure.E8 or o8 Defrost cycle / Overheat protection.EA or oA Indoor humidity sensor failure.EC or oC Outdoor humidity sensor failure.E9 or o9 High pressure protection.SolutionsCheck if your purchased unit has Fresh air function.This unit comes standard with coil protection forContact your service agent.If your unit does not support Fresh air function, turndip switch 1 to the off position.Else, contact your service agent.* PTW Series Only.Contact your service agent.Contact your service agent.Contact your service agent.Contact your service agent.Check if your purchased unit has Reverse heatingfunction. If your unit does not support Reverse heating,turn dip switch 2 to the off position.Else, contact your service agent.de-icing and overheating. Wait for 30 minutes. Thiserror will clear on it's own.If error persisted, contact your service agent.* PTW Series Only.Check if your purchased unit has Fresh air function.If your unit does not support Fresh air function, turndip switch 1 to the off position.Else, contact your service agent.* PTW Series Only.Check if your purchased unit has Fresh air function.If your unit does not support Fresh air function, turndip switch 1 to the off position.Else, contact your service agent.
TroubleshootingDiagnostic Error Codes (Only for Inverter units)This unit come with its own diagnostic error codes for the inverter unit. This is to assist in determining the fault of the unit.Error codeon displayError content0SolutionsCheck if your power input is correct.Remove power to your unit and re-apply powerto your unit. Check if the unit runs normally.If error persisted, contact your service agent.Contact your service agent.Contact your service agent.134589131421Compressor overcurrentCompressor out of stepCompressor out of phaseDC voltage too lowDC voltage too highCommunication abnormalityAC out of phase or CT disconnectionIPM over temperature protectionCompressor phase current protectionEEPROM does not match program(software protection)Check if your power input is correct.Remove power to your unit and re-apply powerto your unit. Check if the unit runs normally.If error persisted, contact your service agent.Check if your power input is correct.Remove power to your unit and re-apply powerto your unit. Check if the unit runs normally.If error persisted, contact your service agent.Check unit's internal wirings are all secured.Remove power to your unit and re-apply powerto your unit. Check if the unit runs normally.If error persisted, contact your service agent.Contact your service agent.Check if the unit's back air intake is blocked or if theheat sink behind the electrical box is blocked orobstructed. Remove all blockages and restart unit.If error persisted, contact your service agent.Contact your service agent.Contact your service agent.16
TroubleshootingProblem Possible Causes Solutions Unit does not start. Unit is unplugged. Power cord not firmly attached to the unit.. Power cord current interrupter device is tripped. Fuse / Circuit breaker is tripped. Unit compressor is in 3-minute self protection mode. Power failure. Unit may be in remote thermostat mode. Unit is turned off by remote thermostat. Function dip switch setting not configured properly. Unit in function failure protection mode. Ensure unit plug is securely plugged into wall socket. Remove the decorative front panel and ensure the black color fast connection power plug is securely fastened. Plug comes with a test/reset button. Ensure plug is not tripped. Check house fuse/circuit breaker box and replace fuse or reset circuit breaker. Unit compressor has a build in 3-minute delay startup. This is normal. Wait 3 minutes, compressor will restart. Wait for power restoration. After power comes on, unit will restart. There may be a 3-minute startup delay due to the compressor self protection. Check if unit is connected to a remote thermostat. Refer to manual section on remote thermostat installation. Unit has many functions that are dip switch enabled. Refer to manual on dip switch setting. Check unit display for error codes. Refer to manual section on error codes. Unit making noise. Some sounds are normal when unit is running. Check manual on section of normal operation sounds. 17
TroubleshootingUnit not cooling or heating and air is not cool or hot during operation. Indoor air flow is restricted. Outdoor air flow is restricted or re-circulating. Temperature control is not set correctly. Air filters are dirty. Room may have been hot or cold when unit startup. Un-controlled outdoor air is entering the room. Heating with Heat pump produces hot air that feels cooler than desired. Continuous fan run setting selected. Function dip switch setting not configured properly. Unit in function failure protection mode. Ensure there are no curtains, blinds or furniture blocking the front of the unit. Ensure the rear grille is not restricted. You must have a minimum 65% free open area. Reset temperature setting to a higher or lower level. Cleaning filters. Check manual on unit maintenance section. Unit may have just been turned on. Allow sufficient amount of time for the unit to heat or cool the room. Check to ensure wall sleeve is properly sealed again the wall. This is normal when you select heat pump heating. Hot air produced by heat pump is lower than electric heat. If you desire for hotter air flow, switch to electric heat (this will be a higher-cost operation). When this function is selected, fan will continue to run even when the compressor or heating cycles is off. Unit has many functions that are dip switch enabled. Refer to manual on dip switch setting. Check unit display for error codes. Refer to manual section on error codes. Problem Possible Causes Solutions 18
TroubleshootingNo hot air when electric heat is selected. Electric heat connector not connected properly. Remove the decorative front panel and ensure the 6 pin fast connection plug is securely plugged in. Water dripping outside. Drain kit not installed. Very hot and humid weather condition. Install drain kit and ensure there is a proper sealing for the drain system. In this condition, there may be some condensation runoff. This is normal. Water dripping inside. Wall sleeve is not level correctly. Wall sleeve leveling is critical to ensure proper drainage of condensations. Re-level wall sleeve to ensure proper installation. Check manual on unit installation. Unit automatically switches to dry mode. Fresh air function activated. This is normal. When fresh air function is activated, the unit will periodically switch operation to dry mode to ensure a comfortable indoor humidity condition. Unit does not function after installing remote thermostat. Remote thermostat wiring not connected correctly. Operation function not transferred to remote thermostat. Check remote thermostat wiring is conforming to this manual and also the remote thermostat manual. Check manual section on remote thermostat connection. You may need to switch operation control manually. Burning odor at start of heating operation. Electric heat mode selected. Dust has gathered on the surface of the heating element. This is normal during initial heating operation by electric heat. It should quickly fade off. Problem Possible Causes Solutions 19