Midea WDC-120G/WK(A) Wired Remote Controller Installation Manual

Safety Precautions

Please read the safety precautions carefully before installing the unit. Pay attention to the following important safety issues:

Meaning of Marks:

WARNING: Indicates improper handling may lead to personal death or severe injury.

CAUTION: Indicates improper handling may lead to personal injury or property loss.

Note: 'Harm' refers to injury, burn, or electric shock requiring long-term treatment but no hospitalization. 'Property loss' refers to loss of properties and materials.

Icon Description:

Icon: ? Meaning: Indicates forbidding. The forbidden subject-matter is indicated by the icon or accompanying text/images.

Icon: ❗ Meaning: Indicates compulsory implementation. The compulsory subject-matter is indicated by the icon or accompanying text/images.

Delegate Installation

WARNING: Please entrust the distributor or professionals to install the unit. Installers must have the relevant know-how. Improper installation by the user may cause fire, electric shock, personal injury, or water leakage.

Usage Warning

Forbid: Do not spray flammable aerosol directly at the wired remote controller. Otherwise, fire may occur.

Forbid: Do not operate with wet hands or allow water to enter the wired remote controller. Otherwise, electric shock may occur.

Main Parameters and Functions

Main Parameters (Table 2-1)

Main Functions

• Compatible with V4+ heat recycling 3-pipe system and V4+ 2-pipe system.
• Timer function.
• Power down memory function.
• Query function.
• Indoor unit error display function.

Wired Remote Controller Outlook

The wired remote controller features the following indicators and buttons:

• Display Area: Shows current settings, including temperature, mode, fan speed, and timer/clock.
• Operating Mode: Indicates the current operating mode (e.g., AUTO, COOL, DRY, HEAT, FAN).
• Transmitting Icon: Indicates when a signal is being transmitted.
• Setting Temperature: Displays the set temperature.
• Operating Icon: Shows the current operating status (e.g., heating, cooling).
• MODE Button: Cycles through operating modes (AUTO→COOL→DRY→HEAT→FAN→AUTO).
• Left Button: Used for navigation and adjustments.
• FAN SPEED Button: Adjusts fan speed (AUTO→LOW→MID→HIGH→AUTO).
• Temp. Setting Button: Adjusts the set temperature (▲/▼).
• Timer/Clock Setting Button: Accesses timer and clock settings.
• Locking Icon: Indicates when the controller is locked.
• Function Icon: Displays various function statuses.
• Timer/Clock Display Area: Shows timer and clock settings.
• Operating Fan Speed: Indicates the current fan speed.
• Swing Icon: Indicates when the swing function is active.
• ON/OFF Button: Turns the air conditioner on or off.
• Right Button: Used for navigation and adjustments.
• Quiet/OK Button: Activates quiet operation or confirms settings.

CAUTION: This controller does not have an economic operating function.

Operation Instructions

On and Off the Air-Conditioner

Press the ON/OFF button to turn the indoor unit on or off. The operating icon will light up when the unit is on and turn off when the unit is off.

Set the Operating Mode

Press the MODE button to cycle through the operating modes: AUTO→COOL→DRY→HEAT→FAN→AUTO. Note: HEAT mode is not available in cool-only settings.

Auto Operation Mode (3-pipe system)

In 3-pipe system auto operation, the unit can automatically switch between COOL and HEAT modes based on the temperature difference between the set temperature (Ts) and indoor temperature (Tf). Fan speed is adjustable.

• Heating mode is activated when Ts-Tf > ΔT.
• Cooling mode is activated when Ts-Tf < -ΔT.
• Minimum operating mode switching interval is 15 minutes.
• The AUTO icon will flash, and COOL or HEAT icon will light up based on the actual operation mode.
• The default ΔT is 2°C, adjustable from 1°C to 4°C. Refer to the 'WIRED REMOTE CONTROLLER INITIAL PARAMETER SETTING' section for details.
• Auto operation mode cannot be changed by other control terminals (e.g., wireless remote controller).

CAUTION: For a 2-pipe system, set the controller to 2-pipe system mode. Refer to the INSTALLATION MANUAL for details. In 2-pipe system auto operation, the unit operates in COOL mode with auto fan speed, which is not adjustable.

Fan Speed Setting

Under COOL, HEAT, and FAN modes, press the FAN SPEED button to adjust fan speed: AUTO→LOW→MID→HIGH→AUTO. Fan speed is not adjustable under AUTO and DRY modes; the default is AUTO.

Temperature Setting

Under AUTO, COOL, DRY, and HEAT modes, use the temperature setting buttons (▲/▼) to set the temperature between 17°C~30°C (62°F~88°F). Temperature cannot be adjusted in FAN mode.

Timer On and Timer Off Setting

Press the timer/clock setting button to enter timer setting status. The screen will display timer icons and time. Use ▲/▼ buttons to adjust the timer. For settings less than 10 hours, adjustments are in 0.5-hour increments. For settings over 10 hours, adjustments are in 1-hour increments, up to a maximum of 24 hours. Press /OK or wait 5 seconds to confirm and exit.

The setting method for timer off is the same as timer on. Setting timer on and off to 0.0h cancels the timer functions.

CAUTION: If the timer is set and the unit is turned on/off using the ON/OFF button, the timer will be canceled simultaneously.

Clock Setting

Long press the timer/clock setting button for 2 seconds to enter clock setting status. Use ▲/▼ buttons to adjust the hour. Use the left/right buttons to switch to minute adjustment, then use ▲/▼ to adjust the minute. Press /OK or wait 5 seconds to confirm and exit.

Quiet Operation

Under COOL, HEAT, and FAN modes, press the /OK button to activate quiet operation, which reduces noise by setting the fan speed to low. The /OK button does not work under AUTO and DRY modes, as the fan speed is auto.

Lock the Wired Remote Controller

Simultaneously press the temperature adjusting buttons (▲ and ▼) to enter the locking state. The lock icon (?) will be lighted up. In the locked state, the controller will not respond to button presses or instructions from a wireless remote controller. Simultaneously press the temperature adjusting buttons (▲ and ▼) again to cancel the locking state.

Air Filter Cleaning Reminding Function

The wired remote controller records the total running time of the indoor unit. When the accumulated running time reaches the pre-set value, the air filter cleaning reminding icon (?) will light up. Long press the FAN SPEED button and Quiet /OK button for 2 seconds to reset the reminding icon, and the controller will re-accumulate the total running time.

CAUTION: The default setting for the reminding function is 2500 hours. It can be changed to 1250, 5000, or 10000 hours. Refer to the installation manual for setting methods.

Swing Function

Press the swing button (?) to activate the swing function when the fan is on. The swing icon (?) will light up. Press the button again to deactivate the swing function, and the swing icon will turn off. This function is effective when used with the corresponding indoor unit.

Query Function

Long press the FAN SPEED button and Quiet /OK button to display temperature readings. Use ▲/▼ buttons to switch between room temperature (tf), middle evaporator temperature (t2), and evaporator-outlet temperature (t2b). Press /OK or wait 5 seconds to exit the query function and return to normal display.

V. Technique Certification and Requirement

• EMC should conform to the CE certification.