• KHP PTAC Units PACKAGED TERMINAL AIR CONDITIONER/HEAT PUMP Before using your air conditioner, please read this manual carefully and keep it for future reference. CONTENTS 1. SAFETY PRECAUTIONS..................................................................2 2. IMPORTANT SAFETY INSTRUCTIONS ..........................................4 3. AIR CONDITIONER FEATURES.......................................................5 4. CONTROL PANEL OPERATION.......................................................6 5. DIP SWITCHES CONFIGURATION...................................................8 6. INSTALLATION..................................................................................11 7. CARE AND CLEANING.....................................................................13 8. TROUBLESHOOTING.......................................................................14 Read This Manual Inside you will find many helpful hints on how to use and maintain your air conditioner properly. Just a little preventive care on your part can save you a great deal of time and money over the life of your air conditioner. You'll find many answers to common problems in the chart of troubleshooting tips. If you review our chart of Troubleshooting Tips first, you may not need to call for service at all. ! CAUTION This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play the appliance. Cleaning and user maintenance shall not be made by children without supervision. ( be applicable for the European Countries ) This appliance is not intended for use by persons (including children) with reduced physical ,sensory or mental capabilities or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. (be applicable for other countries except the European Countries ) Children should be supervised to ensure that they do not play with the appliance. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. The appliance shall be installed in accordance with national wiring regulations. Do not operate your air conditioner in a wet room such as a bathroom or laundry room. The appliance with electric heater shall have atl east1 meters pacet ot hec ombustible materials. Contactthe authorised service technician for repair or maintenance of this unit. Contact the authorised installer for installation of this unit. 1 SAFETY PRECAUTIONS To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring of instructions may cause harm or damage. The seriousness is classified by the following indications. ! WARNING This symbol indicates the possibility of death or serious injury. ! CAUTION This symbol indicates the possibility of injury or damage to property. Meanings of symbols used in this manual are as shown below. Never do this. ! Always do this. ! WARNING ! ! ! ! ! ! Plug in power plug properly. Do not operate or stop the unit by inserting or pulling out the power plug. Do not damage or use an unspecified power cord. Otherwise, it may cause electric shock or fire due to excess heat generation. It may cause electric shock or fire due to heat generation. It may cause electric shock or fire. If the power cord is damaged, it must be replaced by the manufacturer or an authorised service centre or a similarly qualified person in order to avoid a hazard. Do not modify power cord length or share the outlet with other appliances. Do not operate with wet hands or in damp environment. It may cause electric shock or fire due to heat generation. It may cause electric shock. This could damage your health. Always ensure effective earthing. Do not allow water to run into electric parts. ! Incorrect earthing may cause electric shock. It may cause failure of machine or electric shock. Incorrect installation may cause fire and electric shock. Unplug the unit if strange sounds, smell, or smoke comes from it. Do not use the socket if it is loose or damaged. It may cause fire and electric shock. It may cause fire and electric shock. Keep firearms away. Do not use the power cord close to heating appliances. It may cause fire. It may cause fire and electric shock. Ventilate room before operating air conditioner if there is a gas leakage from another appliance. Do not direct airflow at room occupants only. Always install circuit breaker and a dedicated power circuit. Do not open the unit during operation. It may cause electric shock. Do not use the power cord near flammable gas or combustibles, such as gasoline, benzene, thinner, etc. It may cause an explosion or fire. Do not disassemble or modify unit. It may cause failure and electric shock. It may cause explosion, fire and, burns. 2 ! CAUTION Do not clean the air conditioner with water. When the air filter is to be removed, do not touch the metal parts of the unit. It may cause an injury. ! When the unit is to be cleaned, switch off, and turn off the circuit breaker. Do not clean unit when power is on as it may cause fire and electric shock, it may cause an injury. ! Stop operation and close the window in storm or hurricane. Operation with windows opened may cause wetting of indoor and soaking of household furniture. Do not place obstacles around air-inlets or inside of air-outlet. It may cause failure of appliance or accident. Do not use strong detergent such as wax or thinner but use a soft cloth. Appearance may be deteriorated due to change of product color or scratching of its surface. ! Ventilate the room well when used together with a stove, etc. Water may enter the unit and degrade the insulation. It may cause an electric shock. Do not put a pet or house plant where it will be exposed to direct air flow. An oxygen shortage may occur. This could injure the pet or plant. Do not use this air conditioner to preserve precision devices, food, pets, plants, and art objects. It may cause deterioration of quality, etc. ! Turn off the main power switch when not using the unit for a long time. Hold the plug by the head of the power plug when taking it out. ! Do not use for special purposes. It may cause electric shock and damage. ! Ensure that the installation bracket of the outdoor appliance is not damaged due to prolonged exposure. If bracket is damaged, there is concern of damage due to falling of unit. Do not place heavy object on the power cord and ensure that the cord is not compressed. There is danger of fire or electric shock. ! Use caution when unpacking and installing. Sharp edges could cause injury. ! Clean the evaporator once every three months by professional people. ! Otherwise it may cause failure of electric heating feature. 3 It may cause failure of product or fire. ! Always insert the filters securely. Clean filter once every two weeks. Operation without filters may cause failure. Do not drink water drained from air conditioner. It contains contaminants and could make you sick. If water enters the unit, turn the unit off at the power outlet and switch off the circuit breaker. Isolate supply by taking the power-plug out and contact a qualified service technician. IMPORTANT SAFETY INSTRUCTIONS WARNING NOTE The power supply cord with this air conditioner contains a current detection device designed to reduce the risk of fire. Please refer to the section Operation , of Current Device for details. In the event that the power supply cord is damaged, it cannot be repaired-it must be replaced with a cord from the Product Manufacturer. , Do not, under any circumstances, cut, remove, or bypass the grounding prong. Power supply cord with 3-prong grounding plug and current detection device For your safety Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. Avoid fire hazard or electric shock. Do not use an extension cord or an adaptor plug. Do not remove any prong from the power cord. WARNING Electrical Information Be sure the electrical service is adequate for the model you have chosen. This information can be found on the serial plate, which is located on the side of the cabinet and behind the grille. Be sure the air conditioner is properly grounded. To minimize shock and fire hazards, proper grounding is important. The power cord is equipped with a three-prong grounding plug for protection against shock hazards. Your air conditioner must be used in a properly grounded wall receptacle. If the wall receptacle you intend to use is not adequately grounded or protected by a time delay fuse or circuit breaker, have a qualified electrician install the proper receptacle. Ensure the receptacle is accessible after the unit installation. Do not run air conditioner without side protective cover in place. This could result in mechanical damage within the air conditioner. The appliance shall be installed in accordance with national wiring regulations. Do not use an extension cord or an adapter plug. NOTE: The shape may be different according to its model: Power Card Power Suppy 230V,15A 230V,20A 230V,30A 4 265V,15A 265V,20A 265V,30A Operation of Current Device(optional) The power supply cord contains a current device that senses damage to the power cord. To test your power supply cord do the following: 1. Plug in the Air Conditioner. 2. The power supply cord will have TWO buttons on the plug head. Press the TEST button, you will notice a click as the RESET button pops out. 3. Press the RESET button, again you will notice a click as the button engages. 4. The power supply cord is now supplying electricity to the unit. (On some products this it also indicated by a light on the plug head.) NOTES: Do not use this device to turn the unit on or off. Always make sure the RESET button is pushed in for correct operation. The power supply must be replaced if it fails reset when either the TEST button is pushed, or it cannot be reset. A new one can be obtained from the product manufacturer. If power supply cord is damaged, it cannot be repaired. It MUST be replaced by one obtained from the product manufacturer. When 265V units are to be installed,the power supply must be permanent wiring.Permanent wiring may be done through the accessory subbase.An exposed cord connection on 265V units are not permitted. AIR CONDITIONER FEATURES This unit has many featrues.The servicer must be familiar with these features in order to properly service the unit. Automatic Quick Warm-up (for heat pump models only) If the room temperature falls to 4.5 OC/8 OF below the set point temperature,the reverse cycle heat is shut off and the electric strip heat is turned on for one cycle,until heating is satisfied. LED Indicators and Buttons The touch pad has buttons for MODE,FAN, POWER,SETPOINT UP and SETPOINT DOWN. It also has LEDs that correspond to the mode, fan speed,power and setpoint operation,to indicate the unit s status.LEDs for HIGH,MED , and LOW indicate the fan speed that is selected. LEDs for FAN,COOL and HEAT indicate what operating mode is active.LED for POWER is the unit ON/OFF status LED.If the unit is in ON mode, the LED will be green.If the unit is OFF,the LED will be off. Compressor Restart Delay This feature extends the overall life of compressor by preventing the short-cycling of the air conditioner.When the compressor restarts,the unit is designed to give a minimum of three minutes to have a time of equalizing the refrigerant pressures for optimizing cycling. Memory The unit has memory .If power is lost,all of the control settings(mode,fan speed,on/off and configuration) are remembered.So when power is restored,the unit will start back up in the mode (and configuration) it was in,when power was lost. NOTE: HEAT mode is for Cooling & Heating models only. High Temperature Protection In Heating Operation The compressor and(or) electric heater will be switched off to prevent damage in high indoor blow air temperature or error indoor temperature sensor. Unit Configuration O F or OC The unit can display in either OF or OC. Automatic Evaporator Freeze Protection Automatically to keep the evaporator from freezing,the compressor is tuuned off and the indoor fan is turned on when the evaporator temperature is too lower.If the evaporator temperature is not too lower this function is off. 5 CONTROL PANEL OPERATION The control panel keypad will look like the following Fig.1. For some models with REMOTE SIGNAL RECEPTOR, the unit can be controlled by the control panel alone or by the remote. NOTE: Some models have no REMOTE SIGNAL RECEPTOR. REMOTE SIGNAL RECEPTOR Fig.1 POWER - Press the POWER button to turn the unit on or off. When the unit is on,the power indicator light will be green.When the unit is off,the light will go out. MODE - Push this button to cycle through the modes from COOL-HEAT-FAN-COOL.The indicator light beside the "MODE" option will illuminate, identifying the mode selected. - COOL:The range of set temperature is 17OC/62OF ~30 OC/86O F.Cooling begins automatically when the room temperature is above the set point,and stops when the room temperature is 2OC(4OF) below the set point.But the compressor will run 5 minutes at least in COOL mode before stoping. The fan runs in continuous mode. - HEAT:The range of set temperature is 17OC/62OF ~29OC/84OF.For heat pump models,the unit can alternate to run between in reverse cycle heat mode and electric heater mode according to the difference between the setting temperature and the room temperature.The fan motor cycles on and off with the compressor and electric heater. NOTE: The reverse cycle and electric heater cannot be run at the same time. In following cases, it is normal that the reverse cycle does not operate. 1.When the outdoor temperatrue is lower than 4O C/40 O F or the room temperature falls to 4.5O C/8 O F below the set point temperature. 2.There is a 3-minute minimum compressor run time at any setting to prevent short cycling. The indoor fan motors starts before the compressor and stops after the compressor cycles off. 3.Push the S1 on the DIP SWITCHES to UP (ON) position. 4.When frost builds up to the evaporator coils,the unit will defrost automatically and the compressor will cycle off. - FAN:Fan operation only without heating and cooling. 6 Note: If the unit has DIP SWITCHES feature,the temperature range can be setted is controlled by DIP SWITCHES.See DIP SWITCHES CONFIGURATIONS on page 8 for details. UP/DOWN BUTTONS ( / ) - Push the UP (or DOWN) button to increase (or decrease) the set temperature of the unit in cooling or heating mode.The temperature can be set by O O increments of 1C (1F).The setting temperature appears in the display. NOTE:Press and hold and buttons together for 3 seconds will alternate the temperature display between OC & OF scale. FAN (FAN SPEED) - Every time you push this button,the fan speed cycles through the settings as follows:HIGH-MEDLOW-HIGH. DISPLAYS: - Shows the set temperature inOC or O F. While on Fan only mode,it shows the room temperature. Control code (on some models): LC-Pads on the control panel is not available.The unit can be setted by using wire cotroller only. FC-Pads on the control panel and wire controller are not available. The unit can be setted by using FRONT DESK CONTROL only. Error codes: AS-Room temperature sensor error; ES-Evaporator temperature sensor error; CS-Condenser temperature sensor error; OS-Outside temperature sensor error; HS-Exhaust temperature sensor error; LE-Wire cotroller error; NOTE:When error occurs,unplug the unit and plug it back in.If error repeats, call for service. Other codes: LO-Room temperature is lower than 0OC/32OF; HI-Room temperature is higher than 37OC/99OF; FP-Low temp. Protection. NOTE: All the illustrations in this manual are for explanation purpose only. Your air conditioner may be slightly different. The actual shape shall prevail. NOTE:This air conditioner is designed to be operated under condition as follows: Cooling Outdoor temp: operation Indoor temp: Heating Outdoor temp: operation Indoor temp: 18-43OC/64-109OF (18-52OC/64-125OF for special tropical models) 17-32 C/62-90FO -5-24 C/23-76F O 0-27 C/32-80FO O O O Note: Performance may be reduced outside of these operating temperatures. CONTROL PANEL OPERATION（CONTINUED） Accessory THIS UNIT IS CONTROLLED BY WALL MOUNTED THERMOSTAT NOTE:When the unit displays LC (Pads on the control panel is not available.The unit can be setted by using wire cotroller only.) You can install the Accessory on the control panel. NOTE: For some models, there is corresponding operation happened after 3 seconds when pressing any button. NOTE: When the are wide differences between USERS MANUAL and Remote controller Illustration on function description, the description on USERS MANUL shall prevail. 7 DIP SWITCHES CONFIGURATIONS (Optional) 2 REMOVING THE FRONT PANEL - Dip switches controls are located behind front panel, through an opening below the control panel.To access,remove front panel.See Fig.2. - Dip switches are accessible without opening the control box.See Fig.3. - Unit must be powered OFF to effectively change their status. A4 A5 X A0A3 UP(ON) DOWN(OFF) 1 2 3 4 S9 1 2 S1 S2 S3 S4 S5 S6 1 2 3 4 S7 1 2 3 4 S8 1 - Pull out at the bottom to release it from the tabs - Then lift up 2 . DIP SWITCHES CONFIGURATIONS Fig.2 - See Table 1 and Fig.4 for Dip Switches configurations and functions of each dip switch position. 1 . Dip Switches Wall thermostat type Heating type Temperature display type Control type Setpoint limit 1 Setpoint limit 2 Fan CON/CYC for heating Fan CON/CYC for cooling Fig.3 Fig.4 Table 1 No . S1 DIP SWITCHES CONFIGURATIONS UP(ON) DOWN(OFF) Electric Heat Only Remarks Electric Heat and Pump Heat O S2 Temperature Display in C S3 Wall Thermostat Enable Temperature Display in F Control Panel Enable UP*UP:61OF~86 O F(16OC~30 O C); S4*S5 UP*DOWN:65OF~78 O F(18OC~26 O C); Two configurations (S4*S5) combine to select set point range. DOWN*UP:63OF~80 O F(17OC~27 O C); S6 For Heat Pump unit only O DOWN*DOWN:68OF~75 O F(20OC~24 OC); Fan Continuous Run for Heating Fan Cycle for Heating S7 Fan Continuous Run for Cooling S9 Use some types of wall Thermostat Fan Cycle for Cooling Use PTAC other Wall Thermostat NOTE: On heating mode, the setting temperature O O can not be higher than 29C/84F. Electric Heat Only (for heat pump unit only) - This setting is typically used for Emergency Heating. Wall Thermostat Enable - A wired wall thermostat can be connected to the unit .If it is,this dip switch must be moved to the Wall Thermostat Enable Position,before the wall thermostat will begin control. Setpoint Temperature Limits - Provides a restricted range of temperature control. 8 you can consult with the sales agency or manufacturer for details Heat and Cool Fan CON/CYC Dip-switches - Allows the fan to operate in continuous or cycle modes while the unit is in heating and cooling mode. CON(Continuous) - Allows fan to run continuously,circulating air even when the temperature setting has been satisfied.This switch helps to maintain the room temperature closer to the thermostat setting. CYC(Cycle) - This setting allows the fan to cycle on and off with the compressor or electric heater.The fan stops a short time after the temperature setting is satisfied. WALL THERMOSTAT TERMINAL (Optional) IMPORTANT: Only trained, qualified personnel should access electrical panel on unit and install electrical accessories. Please contact your local electrical contractor, dealer, or distributor for assistance. Thermostat Wire Routing Thermostat wire is field supplied. Recommended wire gauge is 18 to 20 gauge solid thermostat wire. NOTE: It is recommended that extra wires are run to unit in case any are damaged during installation. Thermostat wire should always be routed around or under, NEVER through, the wall sleeve. The wire should then be routed behind the front panel to the easily accessible terminal connector. - Insert the wire connector of the wall thermostat into the relevant terminal according to different shapes as shown below. Terminal of some types of wall thermostat Dip switch Installation instruction of PTAC other Wall Thermostat - Remove the two screws as shown below and take the cover panel down. Remove the two screws Take the cover panel down Terminal of PTAC other Wall Thermostat NOTE: Refer to thermostat installation instructions for details on installing wall thermostat. Installation instruction of some types of wall Thermostat (you can Consult with the sales agency or manufacturer for details) - Pull the dip switch to the DOWN(OFF) position as shown below. Dip switch 9 TERMINAL 24V(L) 24V(N) COMP HEAT1 HEAT2 4-WAY HI-FAN Fig. A - Proper Wire Routing Beneath Unit LOW-FAN FC(L) THERMOSTAT WIRE ROUTING (UNDER SLEEVE, BEHIND FRONT PANEL) FC(N) Terminal of PTAC other Wall Thermostat DESIGNATION FC(L) Front desk control terminal L FC(N) Front desk control terminal N LOW-FAN Low fan speed HI-FAN High fan speed 4-WAY 4-way valve(For heat pump system) HEAT2 Electrical heater 2 HEAT1 Electrical heater 1 COMP Compressor 24V(N) 24VAC terminal N 24V(L) 24VAC terminal L WALL THERMOSTAT TERMINAL (Optional) FRONT DESK CONTROL ! CAUTION The controller can handle a switch signal from FC(L) and FC(N) input, called front desk control. Input must be 24VAC. If system doesn't receive a 24VAC signal, it will turn unit off; otherwise, the unit runs in normal control. UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Improper wiring may damage unit electronics. Common busing is not permitted. Damage or erratic operation may result. NOTE: Use terminal 4-way for heat pump connection only. Suggest set the compressor protection time morn than 3 minutes in wall thermostat. If set less than 3 minutes, the compressor will restart delay 3 minutes still. Wall thermostat must be heating changeover 4-way valve. For thermostats that have only one fan speed output (on or auto),the fan speed is determined by how the terminal connector is wired. If Low fan is desired, wire the G output from the thermostat to (LOW-FAN) on the units terminal block. If High fan is desired, wire the G output from the themostat to (HI-FAN) on the units terminal block. The range of set tempreture of Wall thermostat must be in consonance with the range of DIP switch setting. Wall thermostat must be set the type properly in consonance with the unit type : heat pump or no heat pump. If the Wall thermostat has only one electrical heater output, connect the two terminals of HEAT 1 and HEAT 2, the unit can operate two electrical heaters(only for the unit has two electrical heaters). Otherwise operate one electrical heater. Please do not remove the control panel. 10 - The DIP switch can control the FRONT DESK CONTROL feature. The DIP switch is on the DOWN position, the unit will be turn off; otherwise,the unit runs in normal control. See FigB. Dip switch of FRONT DESK CONTROL FigB. INSTALLATION HOW TO INSTALL THE UNIT Dimension of air conditioner ! CAUTION 1067mm/42inch There are sharp edges that can cause serious cuts. When lifting the air conditioner,it is HEAVY.Use 2 people to lift. 408mm/16inch - For existing sleeve,you should measure the wall sleeve dimensions. - Install the new air conditioner according to these installation instructions to achieve the best performance. All wall sleeves used to mount the new air conditioner must be in good structural condition and have a rear grille that securely attaches to the sleeve or the flange of the sleeve to secure the new air conditioner. - To avoid vibration and noise,make sure the unit is installed securely and firmly. - When installing the sleeve,make certain there is nothing within 20 of the back that would interfere with heat radiation and exhaust air flow. (See Fig.2) 606mm/23.9inch Dimension of sleeve assembly (optional) 1067mm/42inch 408mm/16inch 376mm/14.8inch COOLED AIR WALL SLEEVE HEAT RADIATION Shipping tape Over 20 INTAKE AIR WALL Fig.3 2 Fig.2 PREPARATION OF SLEEVE ASSEMBLY(optional) - Refer to the installation instruction of sleeve assembly for details. PREPARATION OF REAR GRILLE ASSEMBLY(optional) - Refer to the installation instruction of rear grille assembly for details. UNIT INSTALLATION - Carefully remove shipping tapes from the front panel. (See Fig.3) 1 - Pull out at the bottom to release it from the tabs - Then lift up 2 . Fig.4 Shipping screw - Remove the front panel. (See Fig.4) - Remove the shipping screw from the vent door.(See Fig.5) 11 Fig.5 1 . INSTALLATION（CONTINUED） UNIT INSTALLATION (CONTINUED) - Rotate the vent control lever to either open or close the vent door.(See Fig.6) Vent control lever Vent closed Vent open Fig.6 NOTE:When vent control lever set at CLOSE,only the air inside the room is circulated and filtered. When set at OPEN,some outdoor air will be drawn into room.This will reduce heating or cooling efficiency. - Lift unit level and slide unit into wall sleeve until firmly against front of wall sleeve and secure with 4 screws and washers (supplied in the SLEEVE ASSEMBLY ) through the unit flange holes. (See Fig.7 and Fig.8) Fig.7 Fig.8 - Reinstall front panel.(See Fig.9) 1 2 Place tabs over top rail 1 . Push Inward at bottom until panel snaps into place 2 . Fig.9 12 ! CAUTION Do not put obstacles around air-inlet or inside of air-outlet of the unit, such as window curtain etc. Always insert the filter securely, clean filter once every two weeks as required. CARE AND CLEANING FRONT PANEL AND CASE - Turn unit off and disconnect power supply.To clean, use water and a mild detergent.DO NOT use bleach and abrasivers.Some commercial cleaners may damage the plastic parts. OUTDOOR COIL - Coil on outdoor side of unit should be checked regularly.Unit will need to be removed to inspect dirt build-up that will occur on the inside of the coil. If clogged with dirt and soot ,coil should be professionally cleaned.Clean inside and outside of outdoor coils regularly. NOTE: Never use a high-pressure spray on coil. ! CAUTION - Removing Air Filter 2 Air filters Pull up Fig.9 - Replacing Air Filter Push down UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damge or improper operation. Airflow restriction may cause damage to the unit. Fig.10 AIR FILTERS IMPORTANT:TURN UNIT OFF BEFORE CLEANING. VENT DOOR FILTER IMPORTANT:TURN UNIT OFF BEFORE CLEANING. ! CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damge or improper operation. Do not operate unit without filters in place.If a filter becomes torn or damaged,it should be replaced immediately. Operating without filters in place or with damaged filter will allow dirt and dust to reach indoor coil and reduce cooling,heating,airflow and efficiency of unit. Airflow restriction may cause damage to unit. - The most important thing you can do to maintain unit efficiency is to clean the filters once every two weeks as required. Clogged filters reduce cooling,heating and airflow. - Keeping filters clean will: Decrease cost of operation. Save energy. Prevent clogged indoor coil. Reduce risk of premature component failure. - To Clean Air Filters: Vacuum off heavy soil. Run water through filter. Dry thoroughly before replacing. - If the vent door is open,access requires the removal of the unit from the wall sleeve.Clean the vent filter twice a year or as required. - Make sure to remove the shipping screw from the vent door.(See.Fig.5) - Rotate the vent control lever to open the vent door. (See. Fig.6) - Remove four screws from the vent door filter. (See.Fig.11) - First pull out the vent door steel wire from the hole of the vent door, then take off the vent door and filter. (See.Fig.11) - Clean the filter.Dry thoroughly before replacing. - Replac the vent door and filter,reinstall the four screws. - Reinsert the vent door steel wire into the hole of the vent door. Vent door control lever . Screws Vent door steel wire Vent door filter Fig.11 13 Vent door TROUBLESHOOTING POSSIBLE CAUSES UNIT DOES NOT START Unit may have become unplugged Fuse may have blown Circuit breaker may have been tripped Unit may be off Unit may be in a protection mode. UNIT NOT COOLING/HEATING ROOM Unit air discharge section is blocked Temperature setting is not high or low enough Note:Setpoint limits may not allow the unit to heat or cool the room to the temperature desired.Check section on dipswitch settings. Unit air filters are dirty. Room is excessively hot or cold when unit is started. Vent door left open. Unit may be in a protection mode. Compressor is in time delay. DISPLAY HAS STRANGE NUMBERS/ CHARACTERS ON IT UNIT MAKING NOISES SOLUTONS Check that plug is plugged securely in wall receptacle. Note:Plug has a test/reset button on it.Make sure that the plug has not tripped. Replace the fuse.See Note 1. Reset circuit breaker.See Note 1. Turn unit on (bottom right button on keypad). Make sure that curtains,blinds or furniture are not restricting or blocking unit airflow. Reset to a lower or higher temperature setting. Remove and clean filters. Allow sufficient amount of time for unit to heat or cool the room.Start heating or cooling early before outdoor temperature,cooking heat or gatherings of people make room uncomfortable. Close vent door. Check dipswitch and wall thermostat settings for desired comfort. Wait approximately 3 minutes for compressor to start. The unit may be in a protection mode. O The unit may be set for OC (instead of F). Clicking,gurging and whooshing noises are normal during operation of unit. WATER DRIPPING OUTSIDE If a drain kit has not been installed,condensation runoff during very hot and humid weather is normal.See Note 2.If a drain kit has been installed and is connected to a drain system,check gaskets and fittings around drain for leaks and plugs. WATER DRIPPING INSIDE Wall sleeve is not installed level Wall sleeve must be installed level for proper drainage of condensation .Check that installation is level and make any necessary adjustments. ICE OR FROST FORMS ON INDOOR COIL Low outdoor temperature Dirty filters When outdoor temperature is approximately 55OF or below,frost may form on the indoor coil when unit is in Cooling mode.Switch unit to FAN operation until ice or frost melts. Remove and clean filters. COMPRESSOR PROTECTION Power may have cycled,so compressor is in a restart protection. Random Compressor restart-Whenever the unit is plugged in,or power has been restarted,a random compressor restart will occur. After a power outage,the compressor will restart after approximately 3 minutes. Compressor Protection-To prevent short cycling of the compressor, there is a random startup delay of 3 minutes and a minimum compressor run time of 3 minutes. Clean the evaporator once every three months by professional people. ELECTRIC HEATING FAILURE NOTES: 1.If circuit breaker is tripped or fuse is blown more than once,contact a qualified electrician. 2.If unit is installed where condensation drainage could drip in an undesirable location,an accessory drain kit should be installed and connected to drain system. 14 Corporate Headquarters: 4051 Haggerty Rd West Bloomfield, MI 48323 USA T: +1 866-777-7071 M-F 10a-6p ET F: +1 248-363-7834 Service Center & Warranty Repairs Facility: 14850 Linwood St Detroit, MI 48238 USA The design and specifications are subject to change without prior notice for product improvement. Consult with the sales agency or manufacturer for details.
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