MIDEA MWIUP-15AEN8-MJ6 (01) PDF MANUAL

The model numbers are:

MWIUP-07EEN8-MM1

MWIUP-07AEN8-MM1

MWIUP-09EEN8-ML8

MWIUP-09AEN8-ML8

MWIUP-12EEN8-MK6

MWIUP-12AEN8-MK6

MWIUP-15EEN8-MJ6

MWIUP-15AEN8-MJ6

MWDUP-09AEN8-UK3

MWDUP-12AEN8-UJ5

Before using this product, please read this manual carefully and keep it for future reference. The design and specifications are subject to change without prior notice for product improvement. Consult with your dealer or manufacturer for details.

The manual uses the following symbols:

WARNING: This signal word indicates a hazard with a medium level of risk which, if not avoided, may result in death or serious injury.

CAUTION: This signal word indicates a hazard with a low degree of risk which, if not avoided, may result in minor or moderate injury.

Read operating instructions carefully before use and keep them for later reference.

This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision. (For 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. (For other countries except 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 at least 1 meter space to the combustible materials.

When the air filter is to be removed, do not touch the metal parts of the unit. It may cause an injury.

Ventilate the room well when used together with a stove, etc. An oxygen shortage may occur.

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.

Do not clean the air conditioner with water. Water may enter the unit and degrade the insulation. It may cause an electric shock.

Do not use for special purposes. Do not use this air conditioner to preserve precision devices, food, pets, plants, and art objects. It may cause deterioration of quality, etc.

Stop operation and close the window in storm or hurricane. Operation with windows opened may cause wetting of indoor and soaking of household furniture.

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.

Always insert the filters securely. It can be caused failure if operated without filters. Please clean filter once every two weeks.

Hold the plug by the head of the power plug when taking it out. It may cause electric shock and damage.

Turn off the main power switch when not using the unit for a long time. It may cause failure of product or fire.

Do not place obstacles around air-inlets or inside of air-outlet. It may cause failure of appliance or accident.

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.

Don’t drink water drained from air conditioner. It contains contaminants and could make you sick.

Use caution when unpacking and installing. Sharp edges could cause injury.

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.

Contact the authorised service technician for repair or maintenance of this unit.

Contact the authorised installer for installation of this unit.

Plug in power plug properly. Otherwise, it may cause electric shock or fire due to excess heat generation.

Do not operate or stop the unit by inserting or pulling out the power plug. It may cause electric shock or fire due to heat generation.

Do not damage or use an unspecified power cord. It may cause electric shock or fire.

Always install a circuit breaker and a dedicated power circuit. Incorrect installation may cause fire and electric shock.

Do not operate with wet hands or in damp environment. It may cause electric shock.

Do not direct airflow at room occupants only. This could damage your health.

Always ensure effective grounding. Incorrect grounding may cause electric shock.

Do not allow water to run into electric parts. It may cause failure of machine of electric shock.

Do not modify power cord length or share the outlet with other appliances. It may cause electric shock or fire due to heat generation.

Unplug the unit if strange sounds, smell, or smoke comes from it. It may cause fire and electric shock.

Do not use the socket if it is loose or damaged. It may cause fire and electric shock.

Do not open the unit during operation. It may cause electric shock.

Keep firearms away. It may cause fire.

Do not use the power cord close to heating appliances. It may cause fire and 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.

Ventilate room before operating air conditioner if there is a gas leakage from another appliance. It may cause explosion, fire and, burns.

Do not disassemble or modify unit. It may cause failure and electric shock.

This air conditioner is designed to be operated under the following conditions:

NOTE: (43/26)°C means the dry bulb temperature is 43°C and the wet bulb temperature is 26°C. Performance may be reduced outside of these operating temperatures.

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 is also indicated by a light on the plug head).

NOTE:

The power supply cord with this air conditioner contains a current detection device designed to reduce the risk of fire. In the event that the power cord is damaged, it cannot be repaired – it must be replaced with a cord from the product manufacturer.

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 cord must be replaced if it fails to reset when either the TEST button is pushed or if it cannot be reset. A new one can be obtained from the product manufacturer.

If power supply cord is damaged, it MUST be replaced by one obtained from the product manufacturer.

The complete electrical rating of your new room air conditioner is stated on the serial plate. Refer to the rating when checking the electrical requirements.

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.

Do not use an extension cord or an adapter plug.

For 265V units 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.

Electrical ground is required on this appliance.

DO NOT ground to a gas line.

If cold water pipe is interrupted by plastic, non-metallic gaskets, or other insulating materials, DO NOT use for grounding.

Check with a qualified electrician if you are in doubt as to whether the appliance is properly grounded.

DO NOT modify power supply cord plug. If it does not fit outlet, have a proper outlet installed by a qualified electrician.

DO NOT have a fuse in the neutral or grounding circuit. A fuse in the neutral, or grounding circuit could result in an electrical shock.

DO NOT use an extension cord with this appliance.

Observe all local governing codes and ordinances. Do not, under any circumstances, remove the power supply cord grounding prong.

Receptacle wiring: Receptacle wiring should be a minimum of 14 gauge. Use copper wire only. It is your responsibility to provide proper and adequate receptacle wiring, installed by a qualified electrician.

Electrical requirements: A time delay fuse or time delay circuit breaker is also required. A separate circuit, serving only this appliance, MUST be provided.

Flammable Refrigerant R32 is used within the appliance. Please follow these precautions:

Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.

DO NOT modify the length of the power cord or use an extension cord to power the unit.

DO NOT share a single outlet with other electrical appliances. Improper power supply can cause fire or electrical shock.

Please follow the instruction carefully to handle, install, clear, service the appliance to avoid any damage or hazard.

When maintaining or disposing the appliance, the refrigerant (R32) shall be recovered properly, shall not discharge to air directly.

Compliance with national gas regulations shall be observed.

Keep ventilation openings clear of obstruction.

The appliance shall be stored so as to prevent mechanical damage from occurring.

The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation.

Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorises their competence to handle refrigerants safely in accordance with an industry recognised assessment specification.

No open fire or device like switch which may generate spark/arcing shall be around appliance to avoid causing ignition of the flammable refrigerant used.

Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.

The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance) and ignition sources or (for example: an operating electric heater) close to the appliance.

Do not pierce or burn.

Be aware that the refrigerants may not contain an odour.

1. Transport of equipment containing flammable refrigerants: See transport regulations.

2. Marking of equipment using signs: See local regulations.

3. Disposal of equipment using flammable refrigerants: See national regulations.

4. Storage of equipment/appliances: The storage of the appliance should be in accordance with the applicable regulations or instructions, whichever is more stringent.

5. Storage of packed (unsold) equipment: Storage package protection should be constructed such that mechanical damage to the equipment inside the package will not cause a leak of the refrigerant charge. The maximum number of pieces of equipment permitted to be stored together will be determined by local regulations.

What is in the Package:

Unit

Control panel sticker (for some configurations)

Owner’s manual

Subbase kit (for 265V model only, optional)

What you need to purchase (Not Included):

Wall sleeve

Prepare the following tools (Not Included):

Gloves

Screwdriver

Pencil

Drill

Ruler or tape measure

Level

The key components visible from the outside are:

Control panel cover

Outlet

Unit (main body)

Air Intake

CAUTION:

There are sharp edges that can cause serious cuts.

When lifting the air conditioner, it is HEAVY. Use 2 people to lift.

Confirm installation size requirements based on unit and wall sleeve dimensions.

Confirmation of installation position:

The unit should have a slight downward tilt to the outside (about 3° to 4°) for drainage.

Maintain clearances: Over 51cm (20 inches) from the back of the unit for heat radiation and exhaust air flow. Over 100cm (39-3/8 inches) in front. Over 2.5cm (1 inch) above and below the unit.

For existing sleeves, measure the wall sleeve dimensions to ensure compatibility.

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 inches of the back that would interfere with heat radiation and exhaust air flow.

NOTE: To make the appliance work better, please do not place a barrier in the air outlet.

1. Attach Wall sleeve (if any). Refer to the installation instruction of sleeve assembly for details. To avoid vibration and noise, make sure the wall sleeve is installed securely and firmly.

2. Carefully remove shipping tapes from the front panel.

3. Remove the front panel: Pull out at the bottom to release it from the tabs, then lift the front panel up.

4. Remove the shipping screw from the vent door (if present).

5. Lift the unit level and slide it into the wall sleeve until it is firmly against the front of the wall sleeve. Secure it with 4 screws and washers (supplied in the SLEEVE ASSEMBLY) through the unit flange holes.

6. Reinstall front panel: Place tabs over the top rail. Push inward at the bottom until the panel snaps into place.

Rotate the vent control lever to either open or close the vent door.

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.

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.

CAUTION:

When the model you purchase is a 265V model, install it with the Subbase kit and connect power wiring on site.

The product plug must be inserted into the power jack of the Subbase kit for use.

All wiring operations and power requirements must be operated and used in accordance with local regulations and policies.

WARNING: To avoid the risk of property damage, personal injury or death due to electrical shock, disconnect the electrical power before working on this product. The instructions provided with the selected subbase kit must be carefully followed. Before performing any electrical or wiring work, turn off the main power to the system.

1. Drill holes: Drill four 1/8-inch holes in the sleeve to line up with the wall sleeve holes in the subbase.

2. Prepare for unit subbase’s wiring:

Remove the COVER from the subbase by loosening 3 screws.

Select one from the four wire outlets according to your need and remove the plate by clipping four slips.

Then burnish the wire outlet and spray anticorrosive paint to it to avoid cutting and rusting the wires.

Insert conduit into the wire outlet and connect the wires of the conduit with the SUBBASE in accordance with all electrical codes.

NOTE: Make sure the appliance is properly grounded.

3. Install the subbase to the sleeve: Install the SUBBASE to the SLEEVE with four screws as shown and tighten them.

4. Install the unit to the sleeve:

Install the unit into the SLEEVE (refer to the installation instructions of the unit).

Plug the power cord of the unit into the plug receptacle of the SUBBASE. The power line can be winded and placed in the slot of the SUBBASE.

NOTE: The direction of the plug receptacle can be changed 180° by loosening two screws and reinstalling it if needed for different power cord configurations.

The wires of heavy current shall be placed in the left of the clapboard, and the wires of light current shall be placed in the right of it. The appliance shall be installed in accordance with national wiring regulations.

5. Assemble the Subbase: Reset the COVER PANEL II into the COVER PANEL I and rotate a certain angle. Install the COVER and COVER PANEL to the SUBBASE with 7 screws securely.

(Follow general non-265V model installation steps for removing/reinstalling front panel and securing unit in sleeve where applicable before subbase specific steps).

CAUTION: Unit must be powered OFF to effectively change their status.

1. Removing the front panel: DIP switches controls are located behind the front panel, through an opening below the control panel. To access, remove the front panel. Pull out at the bottom to release it from the tabs, then lift the front panel up.

2. DIP switches are accessible without opening the control box itself (once front panel is removed).

3. Change the DIP switch positions as needed according to the configuration diagrams and tables. Ensure the unit is powered OFF before making changes.

DIP Switches control various operational parameters. Refer to the diagram below (Fig.4 in manual) for switch locations and general functions:

General Functions (may vary by switch bank S1, S3, S4, S5, etc.):

Wall thermostat type

Load delay for 3 seconds

Heating type

Temperature display type (°C/°F)

Control type

Set point limit 1 & 2 (temperature range)

Fan CON (Continuous) / CYC (Cycle) for heating

Fan CON (Continuous) / CYC (Cycle) for cooling

Low temp. Protection

Detailed DIP Switch Configurations (Table 1):

Low temp. Protection (optional): If unit senses a room temperature below 32°F (0°C), the fan motor and electric strip heat will turn on and warm the room to 40°F (4.4°C). The fan stops a short time after the temperature is satisfied.

Heat and Cool Fan CON/CYC Dip-switches:

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.

Electric Heat Only (for heat pump unit only): This setting is typically used for Emergency Heating.

Setpoint Temperature Limits: Provides a restricted range of temperature control.

Wall Thermostat control: A wired wall thermostat can be connected to the unit. If it is, DIP switch S3 must be moved to the Wall Thermostat Enable Position, before the wall thermostat will begin control.

CAUTION: Unit must be powered OFF to effectively change their status.

1. Press the UP (TEMP +) and DOWN (TEMP -) buttons on the control panel together for 3 seconds to activate the DIP switches configurations by panel control.

2. The LED display window will show two digits: the high (left) digit for DIP switches and the low (right) digit for functions.

3. Press the UP (TEMP +) button to set the DIP switches (select which switch group you are configuring, e.g., 1 for S1, 3 for S3*S9, etc.).

4. Press the DOWN (TEMP -) button to set the functions (select the desired setting for that switch group).

5. Refer to the table below for specific settings:

6. After setting, press the UP and DOWN buttons together for 3 seconds again, or if there is no operation within 30 seconds, the unit will exit the DIP switches configurations mode and save the last settings.

NOTE:

The LED display window will show 00 when you first enter the setting mode. Only when you set the general setting (High digit 0) to 1 (by panel control) can you start the next settings.

To activate front desk control function (SW7), you need to pull the physical DIP switch SW7 to DOWN(OFF), and then set the panel control for SW7 (High digit A) to 0 (front desk control enable).

After all settings are set, press UP and DOWN buttons together for 3 seconds to exit the operation interface and cut off the power. When re-powered on, the settings are activated.

IMPORTANT: Only trained, qualified personnel should access the electrical panel on the unit and install electrical accessories. Please contact your local electrical contractor, dealer, or distributor for assistance.

Step 1: Thermostat Wire Routing

Thermostat wire is field supplied. Recommended wire gauge is 18 to 20 gauge solid thermostat wire.

It is recommended that extra wires are run to the 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.

Step 2: Connecting the Wall Thermostat

Refer to the thermostat installation instructions for details on installing the wall thermostat itself.

Ensure the main DIP Switch S3 is set to “Wall Thermostat Enable (ON)” for the unit to respond to the wall thermostat.

For PTAC other Wall Thermostat (non-Midea specific): Remove the two screws on the unit’s terminal cover panel and take the cover panel down to access the terminal block.

Insert the wire connector of the wall thermostat into the relevant terminal on the PTAC unit according to the terminal designations. (See table below for terminal designations).

Consult with the sales agency or manufacturer for details specific to your thermostat type.

The terminal designations for PTAC Wall Thermostat (MODE A / MODE B wiring) are as follows:

The controller can handle a switch signal from FC(L) and FC(N) input, called front desk control. The input must be 24VAC.

If the system doesn’t receive a 24VAC signal on these terminals (when enabled), it will turn the unit off; otherwise, the unit runs in normal control.

The DIP switch SW7 can control the FRONT DESK CONTROL feature. If physical DIP switch SW7 is on the DOWN position (which typically corresponds to “enable” for this feature when configured via panel control), and the panel control setting for SW7 (High digit A, Low digit 0) is set to enable, the unit will turn off if the front desk signal is lost; otherwise, the unit runs in normal control.

If the unit has only one electrical heater output, connect the two terminals of HEAT 1 and HEAT 2 together. The unit can then operate two electrical heaters (only if the unit actually has two electrical heaters). Otherwise, it will operate one electrical heater.

Do not remove the control panel of the unit unless necessary for wiring access as instructed.

Use terminal 4-WAY for heat pump connection only.

It is suggested to set the compressor protection time for more than 3 minutes. If set less than 3 minutes, the compressor will still have a restart delay of 3 minutes.

The wall thermostat must be a heating changeover 4-way valve type for heat pump models.

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 unit’s terminal block.

If High fan is desired, wire the G output from the thermostat to (HI-FAN) on the unit’s terminal block.

The range of set temperature of the Wall thermostat must be in consonance with the range of the DIP switch setting on the unit.

The Wall thermostat must be set to the type properly in consonance with the unit type: heat pump or no heat pump.

CAUTION – 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.

1. POWER – Function (Button with Power Symbol): Press the POWER button to turn the unit on or off.

2. Mode – Function (MODE Button): Push this button to cycle through the modes from COOL – DRY – HEAT – FAN – COOL. The indicator light beside the “MODE” option will illuminate, identifying the mode selected.

COOL: Cooling begins automatically when the room temperature is above the set point, and stops when the room temperature is 2°C(4°F) below the set point. But the compressor will run 5 minutes at least in COOL mode before stopping.

HEAT: 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 with the compressor stop.

DRY: In this mode, the air conditioner will generally operate in the form of a dehumidifier. Since the conditioned space is a closed or sealed area, some degree of cooling will continue.

NOTE (Heat Mode): 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 temperature is lower than 4°C/40°F or the room temperature falls to 4.5°C/8°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 (Electric Heat Only).

4. When frost builds up to the evaporator coils, the unit will defrost automatically and the compressor will cycle off.

NOTE (AUTO Mode): When you select AUTO mode (if available), the FAN speed will be automatically adjusted at the setting temperature and room temperature.

FAN: Fan operation only without heating and cooling.

NOTE (DIP SWITCHES): If the unit has DIP SWITCHES feature, the temperature range can be set and is controlled by DIP SWITCHES.

3. + / – (Up and Down buttons – Temperature Control): Push the UP (TEMP +) or DOWN (TEMP -) button to increase or decrease the set temperature of the unit in cooling or heating mode. The temperature can be set by increments of 1°C (1°F). The setting temperature appears in the display.

NOTE: Press and hold “+” and “-” buttons together for 3 seconds will alternate the temperature display between °C & °F scale.

4. FAN (FAN SPEED) – Function (Button with Fan Symbol or “Y” / “CONSTANT FAN” on some diagrams): Every time you push this button, the fan speed cycles through the settings as follows: AUTO – HIGH – LOW – AUTO.

NOTE: When you select AUTO mode, the FAN speed will be automatically adjusted at the setting temperature and room temperature. On Dry mode, the fan speed is controlled at Low speed automatically.

In cooling mode, press the CONSTANT FAN button (often marked with a fan symbol and “CONSTANT FAN” or similar) to turn on or off the constant fan function.

When the function is turned on, the constant fan light will illuminate, identifying the fan continuous run for cooling.

When the function is turned off, the constant fan light will go out, identifying the fan cycle run with compressor stop.

NOTE: Every time the unit is turned on, the function will work as per the DIP SWITCHES CONFIGURATIONS.

Long press the open key (this may refer to the VENT button or a similar key depending on your specific panel layout) and continuous air function key (this may refer to the CONSTANT FAN button) for 5 seconds at the same time. The unit should provide a quick check immediately response (not after 5 seconds of delay).

This will turn on or off the lock panel function. The remote control (if applicable) will still work.

It will display ‘LL’ when you locked the control panel.

To unlock, repeat the same key combination.

The display shows the set temperature in °C or °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 set by using wire controller only. (If this appears, you can install the accessory “Control panel sticker” if your unit is meant to be controlled by a wall thermostat).

FC: Pads on the control panel and wire controller are not available. The unit can be set by using FRONT DESK CONTROL only.

Error codes:

E0: Failure of EEPROM parameter

E3: The fan stall error

E4: Main control and Display communication error

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 controller 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 0°C/32°F

HI: Room temperature is higher than 37°C/99°F

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: For some models, there is corresponding operation happened after 3 seconds when pressing any button.

CAUTION – UNIT DAMAGE HAZARD: Failure to follow this caution may result in equipment damage or improper operation. Airflow restriction may cause damage to the unit.

FRONT PANEL AND CASE:

1. Turn unit off and disconnect power supply.

2. To clean, use water and a mild detergent. Do not use bleach and abrasives. Some commercial cleaners may damage the plastic parts.

OUTDOOR COIL:

1. The coil on the outdoor side of the unit should be checked regularly.

2. The unit will need to be removed from the wall sleeve to inspect dirt build-up that will occur on the inside of the coil.

3. If clogged with dirt and soot, the coil should be professionally cleaned. Clean inside and outside of outdoor coils regularly.

NOTE: Never use a high-pressure spray on the coil.

CAUTION:

Failure to follow this caution may result in equipment damage 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 a damaged filter will allow dirt and dust to reach the indoor coil and reduce cooling, heating, airflow and efficiency of the unit. Airflow restriction may cause damage to the 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:

1. Remove the air filters by pulling them up from the unit (typically two filters).

2. Vacuum off heavy soil.

3. Run water through the filter in the opposite direction of airflow.

4. Dry thoroughly before replacing.

5. Replace the air filters by pushing them down into their slots.

IMPORTANT: TURN UNIT OFF BEFORE CLEANING.

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.

1. Make sure to remove the shipping screw from the vent door (if it was not removed during installation).

2. Rotate the vent control lever to open the vent door.

3. Remove the four screws from the vent door filter.

4. First pull out the vent door steel wire from the hole of the vent door, then take off the vent door and filter.

5. Clean the filter. Dry thoroughly before replacing.

6. Replace the vent door and filter, reinstall the four screws.

7. Reinsert the vent door steel wire into the hole of the vent door.

Unit may have become unplugged. 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.

Fuse may have blown. Replace the fuse. (Note 1: If circuit breaker is tripped or fuse is blown more than once, contact a qualified electrician).

Unit may be off. Reset circuit breaker. (Note 1: If circuit breaker is tripped or fuse is blown more than once, contact a qualified electrician).

Unit may be in a protection mode. Turn unit on (bottom right button on keypad – POWER button).

Unit air discharge section is blocked. Make sure that curtains, blinds or furniture are not restricting or blocking unit airflow.

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. Reset to a lower or higher temperature setting.

Unit air filters are dirty. Remove and clean filters.

Room is excessively hot or cold when unit is started. 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.

Vent door left open. Close vent door.

Unit may be in a protection mode. Check dipswitch and wall thermostat settings for desired comfort.

Compressor is in time delay. Wait approximately 3 minutes for compressor to start.

The unit may be in a protection mode. Refer to display code explanations or try turning the unit off and on. If the problem persists, contact service.

Clicking, gurgling and whooshing noises are normal during operation of unit.

If a drain kit has not been installed, condensation runoff during very hot and humid weather is normal. (Note 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).

If a drain kit has been installed and is connected to a drain system, check gaskets and fittings around drain for leaks and plugs.

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.

Low outdoor temperature. When outdoor temperature is approximately 55°F (13°C) 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.

The filters are dirty. Remove and clean filters.

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. If issues persist, contact a qualified service technician.