Introduction

The Midea Ductless Split AC Unit 18000 BTU is an energy-efficient cooling and heating solution designed for spaces up to 1,000 square feet. Featuring a quiet operation at just 19 dB, it ensures a comfortable environment without disruptive noise. The unit includes Wi-Fi connectivity for remote control via an app, making it convenient to adjust settings from anywhere. This versatile system is priced at $1,299.99, providing excellent value for efficient climate control.

Specifications 

• Capacity: 18000 BTU
• SEER Rating: 22
• Energy Star Certified
• Indoor Unit Dimensions: 35.4 x 11.4 x 8.5 inches
• Outdoor Unit Dimensions: 35.4 x 12.6 x 10.2 inches
• Operation Modes: Cooling, Heating, Dehumidification, Fan Only
• Noise Level: As low as 26 dB (Indoor), 52 dB (Outdoor)
• Remote Control Included
• Wi-Fi Connectivity Option Available
• Air Purification and Dehumidification Functions

A NOTE ABOUT SAFETY

Any time you see this symbol in manuals, instructions and on the unit, be aware of the potential for personal injury. There are 3 levels of precaution:

1. DANGER identifies the most serious hazards which will result in severe personal injury or death.
2. WARNING signifies hazards that could result in personal injury or death.
3. CAUTION is used to identify unsafe practices which could result in minor personal injury or product and property damage.

NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

WARNING

PERSONAL INJURY, DEATH AND / OR PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal injury, death or property damage.

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or service agency must use factory-authorized kits or accessories when modifying this product.

Read and follow all instructions and warnings, including labels shipped with or attached to unit before operating your new air conditioner.

Description

The Midea Ductless Split AC Unit 18000 BTU features a sleek and modern design that blends seamlessly into any decor. The indoor unit has a slim profile, making it easy to install and maintain. The system comes with a comprehensive remote control that allows for precise temperature adjustment and mode selection. Additionally, the unit is equipped with advanced air purification technology, helping to remove allergens and pollutants from the air, and a dehumidification function to maintain optimal humidity levels.

The outdoor unit is designed for durability and weather resistance, ensuring reliable operation even in harsh conditions. The system also includes features like auto-restart after power outages and a self-cleaning mode to keep the indoor unit free from dust and bacteria.

Midea Ductless Split AC Unit 18000 BTU  GENERAL

The high-wall fan coil unit provides quiet, and maximum comfort. In addition to cooling and/or heating, the high wall fan coil unit matched with an outdoor condensing unit filters and dehumidifies the air in the room to provide maximum comfort.

IMPORTANT: The high wall fan coil unit should be installed by authorized personnel only; using approved tubing and accessories. If technical assistance, service or repair is needed, contact the installer. The high wall fan coil unit can be set up and operated from the remote control (provided). If the remote is misplaced, the system can be operated from the “Auto” setting on the unit.

Operating Modes

The high-wall fan coil unit has five operating modes:

• FAN Only
• AUTO
• HEATING (heat pumps only)
• COOLING
• DEHUMIDIFICATION

FAN Only
In the FAN Only mode, the system filters and circulates the room air without changing room air temperature.

AUTO 
In the AUTO mode, the system automatically cools or heats the room according to the user-selected set point.

NOTE: AUTO mode is recommended for use on single-zone applications ONLY. Using AUTO CHANGEOVER on multi-zone applications could set an indoor unit to STANDBY mode, indicated with two dashes (--) on the display, which will turn off the indoor unit until all the indoor units are in the same mode (COOLING or HEATING). HEATING is the system's priority mode. Simultaneous HEATING and COOLING is not allowed.

HEATING
In the HEATING mode, the system heats and filters the room air.

COOLING
In the COOLING mode, the system cools, dries and filters the room air.

DEHUMIDIFICATION (DRY)
In the DEHUMIDIFICATION mode, the system dries, filters and slightly cools the room air temperature. This mode prioritizes air dehumidification but it does not take the place of a dehumidifier.

Wireless Remote Control
The remote control transmits commands to set up and operate the system. The control has a window display panel that displays the current system status. The control can be secured to a surface when used with the mounting bracket provided.

Wired Remote Control (Optional)
Refer to the Wired Controller manual.

24V Interface (Optional)
Allows the control of the Ductless System with a third party thermostat.

Smartphone Control (Optional)
Capability to be controlled by a smartphone.

Part Names & Display

WIRELESS REMOTE CONTROL

Before using your new air conditioner, familiarize yourself with the wireless remote control.

LCD SCREEN INDICATORS

REMOTE CONTROL

CAUTION

EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage. Handle the control with care and avoid getting the control wet.

IMPORTANT: The remote control can operate the unit from a distance of up to 26 ft. (8 m) as long as there are no obstructions. When the timer function is used, the remote control should be kept in the vicinity of the fan coil (within 26 ft. / 8 m).
The remote control can perform the following basic functions:

• Turn the system ON and OFF
• Select the operating mode
• Adjust room air temperature set point and fan speed
• Adjust right-left airflow direction

Refer to the “WIRELESS REMOTE CONTROL” on page 4 for a detailed description of all the capabilities of the remote control.

Battery Installation

Two AAA 1.5v alkaline batteries (included) are required for remote control operation.

To install or replace batteries:

1. Slide the back cover off the control to open the battery compartment.
2. Insert the batteries. Follow the polarity markings inside the battery compartment.
3. Replace the battery compartment cover.

NOTES:

1. When replacing batteries, do not use old batteries or a different type battery. This may cause the remote control to malfunction.
2. If the remote is not going to be used for several weeks, remove the batteries. Otherwise, battery leakage may damage the remote control.
3. The average battery life under normal use is about 6 months.
4. Replace the batteries when there is no audible beep from the indoor unit or if the Transmission Indicator fails to light.

NOTE: When batteries are removed, the remote control erases all presets (e.g., COMFORTSENSE). The presets must be restored after the insertion of new batteries.

BASIC REMOTE CONTROL OPERATION

Before operation, ensure the unit is plugged in and power is available.

COOL Mode

1. Press MODE to select the COOL mode.
2. Set your desired temperature using TEMP or TEMP .
3. Press FAN to select the fan speed in a range of Auto - ‘100%,
4. Press ON/OFF to start the unit.

Setting Temperature

The operating temperature range for units is 60-86°F (16-30°C)/(68-82 °F (20-28°C) (depends on model). You can increase or decrease the set temperature in 1°F(0.5°C) increments.

HEAT Mode

1. Press MODE to select the HEAT mode.
2. Set your desired temperature using TEMP or TEMP .
3. Press FAN to select the fan speed in the range of Auto - 100%.

NOTE: As the outdoor temperature drops, the performance of your unit’s HEAT function may be affected. In such instances, we recommend using this air conditioner in conjunction with other heating appliances.

AUTO Mode

In AUTO mode, the unit automatically selects the COOL, FAN, or HEAT operation based on the set temperature.

1. Press MODE to select AUTO.
2. Set your desired temperature using TEMP or TEMP .
3. Press ON/OFF to start the unit.

NOTE: FAN Speed can not be set in the AUTO mode.

DRY Mode

1. Press MODE to select the DRY mode.
2. Set your desired temperature using TEMP or TEMP .
3. Press ON/OFF to start the unit.

FAN Mode

1. Press MODE to select the FAN mode.
2. Press FAN to select the fan speed in the range of Auto - 100%.
3. Press ON/OFF to start the unit.

Remote Control Operation

Quick Start

NOTE: When transmitting a command from the remote control to the unit, be sure to point the control toward the right side of the unit. The unit confirms receipt of a command by sounding an audible beep.

1. Turn the unit on by pushing ON/OFF.
   NOTE: If there is a preference for °C rather than °F (default), press and hold the + and - temperature set point buttons together for approximately 3 seconds.

2. Select the desired mode by pushing MODE.

   

3. Select the temperature set point by pointing the control toward the unit and pressing the increase/decrease temperature set point buttons until the desired temperature appears on screen.
4. Press FAN to select the desired fan speed.

NOTE: If the unit is operating in DRY or AUTO mode, the fan speed will be automatically set and cannot be adjusted.

Set the airflow direction. When the unit is turned on, the Up-Down airflow louvers default to the cooling or heating position. The user can adjust the horizontal Up-Down airflow louver position by pushing DIRECT or have continuous louver movement by pressing SWING.

OPERATING TEMPERATURE
When your air conditioner is used outside of the following temperature ranges, certain safety protection features may activate and cause the unit to disable.

Table 1 - Inverter Split Type

NOTE: FOR OUTDOOR UNITS WITH BASEPAN HEATER OR CRANKCASE HEATER.

When the outside temperature is below 32°F (0°C), we strongly recommend maintaining power on the unit to ensure smooth ongoing performance.

To optimize unit performance, perform the following:

• Keep doors and windows closed
• Limit energy usage by using TIMER ON and TIMER OFF functions.
• Do not block air inlets or outlets.
• Regularly inspect and clean air filters.

FEATURES

The unit provides the following features for added comfort and safety.

Auto-Restart (some units)
If the unit loses power, it automatically restarts with the prior settings once power has been restored.

Anti-mildew (some units)
When turning off the unit from COOL, AUTO (COOL), or DRY modes, the air conditioner continues to operate at very low power to dry up any condensed water and prevent mildew growth.

Wireless Control (some units)
Wireless control allows users to control the air conditioner using a mobile phone and a wireless connection. For the USB device access, replacement, maintenance operations must be carried out by professional staff.

Louver Angle Memory (some units)
When turning on the unit, the louver automatically resumes its former angle.

Active Clean (some units)

The Active Clean Technology washes away dust, mold, and grease that may cause odors when it adheres to the heat exchanger by automatically freezing and then rapidly thawing the frost. The operation produces more condensed water to improve the cleaning effect.

After cleaning, the blower wheel keeps operating with hot air to blow-dry the evaporator, thus preventing the growth of mold and keeping the inside clean. When this function is turned on, the indoor unit window displays CL. After 20 to 45 minutes, the unit turns off automatically and cancels the function.

Breeze Away (some units)
This feature avoids direct air flow from blowing on inhabitants.

Refrigerant Leak Detection (some units)
The indoor unit automatically displays EL0C when it detects refrigerant leakage.

COMFORTSENSE (some units)

The COMFORTSENSE feature enables the emote control to measure the temperature at its current location. When using AUTO, COOL, or HEAT modes, measuring ambient temperature from the remote control (instead of from the indoor unit it self) will enable the air conditioner to optimize the temperature around you and ensure maximum comfort.

1. Press COMFORTSENSE button to activate feature. The remote control will send temperature signal to the unit every three minutes.
2. Press COMFORTSENSE button again to turn off this feature.

Sleep Operation

The SLEEP function is used to decrease energy use while inhabitants sleep and do not require the same temperature settings to maintain comfort. This function can only be activated via the remote control.

NOTE: The SLEEP function is not available in the FAN or DRY mode.

Press SLEEP when you are ready to sleep. When in the COOL mode, the unit increases the temperature by 2°F (1°C) after 1 hour, then increases an additional 2°F (1°C) after another hour. When in the HEAT mode, the unit decreases the temperature by 2°F (1°C) after 1 hour, and decreases an additional 2°F (1°C) after another hour.

The SLEEP feature stops after 8 hours and the system keeps running under the final setting.

Resetting the Remote Control

If the batteries in the remote control are removed, the current settings cancel and the control returns to the initial settings and enters the STANDBY mode. Push ON/OFF to activate.

NOTE: For multi-zone air conditioners, the following functions are not available: ACTIVE CLEAN, SILENCE, BREEZE AWAY, REFRIGERANT LEAKAGE DETECTION and ECO.

Setting Horizontal Angle of Air Flow

While the unit is on, press SWING on the remote control to initiate the horizontal louver AUTO SWING feature.

NOTE: When using the COOL or DRY mode, do not set the louver at a high angle for long periods of time. Doing so may cause water to condense on the louver blade, which may drop on floors or furnishings.

NOTE: When using the COOL or HEAT mode, setting the louver at too high of an angle can reduce the performance of the unit due to restricted air flow.

Setting Vertica Angle of Air Flow

The vertical angle of the airflow must be set manually. Grip the deflector rod (see Fig. 12) and manually adjust it to your preferred direction.

Manual Operation (Without Remote Control)

CAUTION
The MANUAL button is intended for testing purposes and emergency operation only. Do not use this function unless the remote control is lost and it is absolutely necessary. To restore regular operation, use the remote control to activate the unit. Unit must be turned off before initiating the manual operation.

Use the following steps to operate the unit manually:

1. Open the front panel of the indoor unit.
2. Locate the MANUAL CONTROL button on the right-hand side of the unit.
3. Press MANUAL CONTROL one time to activate the FORCED AUTO mode.
4. Press MANUAL CONTROL again to activate the FORCED COOLING mode.
5. Press MANUAL CONTROL a third time to turn the unit off.

6. Close the front panel.

   

   

NOTE: DO NOT move the louver by hand. Doing so takes the louver out of sync. Should this occur, turn off the unit and unplug it for a few seconds, then restart the unit. Doing so resets the louver.

CAUTION
DO NOT put your fingers in or near the blower and suction unit side of the unit. The high-speed fan inside the unit may cause injury.

Setup Guide

To set up the Midea Ductless Split AC Unit 18000 BTU, 

• Start by selecting a suitable location for both the indoor and outdoor units. 
• Ensure the outdoor unit is installed on a level surface and has adequate clearance from obstructions. 
• The indoor unit should be mounted on a wall at least 7 feet off the ground to ensure optimal airflow.
• Follow the provided instructions for connecting the refrigerant lines and electrical connections between the two units. 
• Once installed, turn on the power and use the remote control to configure the settings. You may also need to pair the unit with your Wi-Fi network if you have the smart version.

CLEANING & MAINTENANCE

CAUTION

ELECTRICAL SHOCK HAZARD
Failure to follow this caution may result in personal injury or death. Always turn off power to the system before performing any cleaning or maintenance to the system. Turn off the outdoor disconnect switch located near outdoor unit. 
Be sure to disconnect the indoor unit if on a separate switch.

CAUTION

EQUIPMENT DAMAGE/OPERATION HAZARD
Failure to follow this caution may result in equipment damage or improper unit operation. 
Operating the system with dirty air filters may damage the indoor unit and could cause reduced cooling performance, intermittent system operation, frost build-up on indoor coil or blown fuses.

Periodic Maintenance
Periodic maintenance is recommended to ensure proper operation of the unit. Recommended maintenance intervals may vary depending on the installation environment, e.g., dusty zones, etc. Refer to Table 2 on page 13.

CAUTION

• Only use a soft, dry cloth to wipe the unit clean. If the unit is especially dirty, you can use a cloth soaked in warm water to wipe it clean.
• Do not use chemicals or chemically treated cloths to clean the unit.
• Do not use benzene, paint thinner, polishing powder or other solvents to clean the unit. They can cause the plastic surface to crack or deform.
• Do not use water hotter than 104°F (40°C) to clean the front panel. This can cause the panel to deform or become discolored.

Cleaning the Air Filters
A clogged air conditioner can reduce the cooling efficiency of your unit, and can also be bad for your health. Make sure to clean the filter once every two weeks.

1. Lift the front panel of the indoor unit.
2. First press the tab on the end of filter to loosen the buckle, lift it up, then pull it towards you.
3. Now pull the filter out.
4. If the filter has a small air freshening filter, unclip it from the larger filter. Clean the air freshening filter with a hand-held vacuum.

5. Clean the large air filter with warm, soapy water. Be sure to use a mild detergent.

   

6. Rinse the filter with fresh water, then shake off any excess water.
7. Dry the filter in a cool, dry place, and keep it out of direct sunlight.
8. Once dry, re-clip the air freshening filter to the larger filter, then slide it back into the indoor unit.

9. Close the front panel of the indoor unit.

   

CAUTION

Do not touch air freshening (Plasma) filter for at least 10 minutes after turning off the unit. 

CAUTION

• Before changing the filter or cleaning, turn off the unit and disconnect its power supply.
• When removing the filter, do not touch the metal parts in the unit. The sharp metal edges can cut you.
• Do not use water to clean the inside of the indoor unit. This can destroy insulation and cause electrical shock.
• Do not expose filter to direct sunlight when drying. This can shrink the filter.

Air Filter Reminders (Optional)
After 240 hours of use, the display window on the indoor unit will flash “CL” This is a reminder to clean the filter. After 15 seconds, the unit reverts to its previous display. To reset the reminder, press LED on the remote control 4 times, or press the MANUAL CONTROL button 3 times. If the reminder is not reset, the “CL” indicator flashes again once the unit is restarted.

Air Filter Replacement Reminder
After 2,880 hours of use, the display window on the indoor unit will flash “nF”. This is a reminder to replace the filter. After 15 seconds, the unit reverts to its previous display. To reset the reminder, press LED on the remote control 4 times, or press the MANUAL CONTROL button 3 times. If the reminder is not reset the reminder, the “nF” indicator flashes again once the unit is restarted.

CAUTION

• Any maintenance and cleaning of the outdoor unit should be performed by an authorized dealer or a licensed service provider.
• Any unit repairs should be performed by an authorized dealer or a licensed service provider.

Preparing for Extended Shutdown Period
Clean the filters and reposition them in the unit. Operate the unit in FAN ONLY mode for 12 hours to dry all internal parts. Turn the main power supply off and remove the batteries from the remote control.

Pre-Season Inspection
After long periods of non-use, or before periods of frequent use, perform the following steps.

System Operation Recommendations

The items outlined in the following list help to assure proper system operation:

• Replace both remote control batteries at the same time.
• Point the remote control toward the unit display panel when transmitting a command.
• Keep doors and windows closed while unit is operating.
• Contact an authorized service representative if a problem arises that cannot be easily resolved.
• Do not perform cleaning or maintenance activities while the unit is on.
• Keep the display panel on the unit away from direct sunlight and heat as this may interfere with remote control transmissions.
• Do not block air intakes and outlets on the indoor or outdoor units.

Energy Saving Recommendations
The following recommendations add greater efficiency to the ductless system:

• Select a comfortable thermostat setting and leave it at chosen setting. Avoid continually raising and lowering the setting.
• Keep the filter clean. Frequent cleaning may be necessary depending on indoor air quality.
• Use drapes, curtains or shades to keep direct sunlight from heating the room on very hot days.
• Limit the unit’s run time by using the TIMER function.
• Do not obstruct the air intake on the front panel.
• Turn on the air conditioning unit before the indoor air becomes too uncomfortable.

TROUBLESHOOTING

Table 2 — Periodic Maintenance

• Increase frequency in dusty zones.
• Maintenance to be carried out by qualified service personnel. Refer to the Installation Manual

The problems listed in Table 3 are not a malfunction and in most situations will not require repairs.

Table 3 — Common Issues

NOTE: If a problem persists, contact a local dealer or your nearest customer service center. Provide them with a detailed description of the unit malfunction as well as your model number.

Table 4 — Troubleshooting

Diagnostic lights are a combination of lights that will illuminate in the display area on the unit. They are a combination of the lights you see during normal operation.

NOTE: If your problem persists after performing the checks and diagnostics listed in the Troubleshooting tables, turn off the unit immediately and contact an authorized service center.

Pros & Cons

Pros

• High energy efficiency with SEER 22 rating
• Quiet operation with low noise levels
• Advanced features like air purification and dehumidification
• Wi-Fi connectivity option for smart home integration
• Compact design suitable for various spaces

Cons

• Higher initial cost compared to traditional AC units
• Installation requires professional assistance in most cases
• Some users report issues with Wi-Fi connectivity stability
• Limited availability of replacement parts in some regions

Customer Reviews

Customers have generally praised the Midea Ductless Split AC Unit 18000 BTU for its powerful cooling performance and energy efficiency. Many have noted the quiet operation and the ease of use with the remote control. However, some users have reported issues with the Wi-Fi connectivity and the need for professional installation.

Common complaints 

Including the higher upfront cost and occasional difficulties in finding replacement parts. Despite these, the overall satisfaction rate remains high due to its robust features and reliable performance.