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Lennox MWCB Series

Lennox MWCB Series
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USER GUIDE
©
2022 Lennox Industries Inc.
Dallas, Texas, USA
WARNING
Improper installation, adjustment, alteration, ser vice or
maintenance can cause property damage, personal
injury or loss of life.
Installation and service must be performed by a li censed
professional HVAC installer (or equivalent) or a service
agency.
General
This wall-mounted indoor unit is matched with an outdoor
air conditioner unit to create a mini-split system that uses
HFC-410A refrigerant.
MWCB and MWHB
Series Units
SINGLE-ZONE MINI-SPLIT SYSTEM
(115V and 208/230V)
508242-01 1/2022
Table of Contents
General ...........................................................................1
Optimal Performance......................................................1
Unit Parts ........................................................................2
Features .........................................................................3
Auto Restart .................................................................3
Louver Angle Memory ..................................................3
Refrigerant Leakage Detection ....................................3
Louver Adjustment ..........................................................3
Return Air Filters .............................................................3
Cleaning Return Air Filters ...........................................3
Operation (Manual) - Force Cooling Mode .....................4
Operation (Wireless Remote Controller) ........................4
Requirements ..............................................................4
Remote Control Specications ....................................4
Wireless Remote Controller Button Functions .............5
Wireless Remote Controller Screen Indicators ............6
Wireless Remote Controller Operation ........................7
Wireless Remote Controller Set Button Function ........7
Troubleshooting ..............................................................8
FCC Compliance Statement — PART 15.19 ..................8
THIS MANUAL MUST BE LEFT WITH THE OWNER
FOR FUTURE REFERENCE
Optimal Performance
Optimal performance for the COOL, HEAT and DRY
modes can be achieved in the following temperature
ranges. When your system is used outside of these
ranges, certain safety protection features will activate and
cause the unit to perform less than optimally.
Table 1. Cool, Heat and Dry Modes Optimal
Performance Ranges
Temp
Location
COOL
HEAT
(Heat Pump
Units Only)
DRY
Room
60°F - 90°F
(16°C - 32°C)
32°F - 86°F
(0°C - 32°C)
50°F - 90°F
(10°C - 32°C)
Outdoor
5°F - 122°F
(-15°C to
50°C)
5°F - 86°F
(-15°C to
30°C)
32°F - 122°F
(0°C - 50°C)
To further optimize the performance of your unit, do 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.

CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.

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Lennox MWCB Series Specifications

General IconGeneral
BrandLennox
ModelMWCB Series
CategoryAir Conditioner
LanguageEnglish

Summary

Optimal Performance

Optimal Performance Ranges

Table detailing optimal temperature ranges for COOL, HEAT, and DRY modes.

Optimizing Unit Performance

Key practices to enhance unit efficiency, such as keeping doors closed and cleaning filters.

General

System Description

Overview of the wall-mounted indoor unit matched with an outdoor unit.

Features

Auto Restart

Unit automatically restarts with prior settings after power loss.

Louver Angle Memory

Louver resumes its former angle operation when the unit is turned on.

Refrigerant Leakage Detection

Indoor unit displays 'EC' upon detecting refrigerant leakage.

Louver Adjustment

Instructions on how to adjust louvers using the remote control, not by hand.

Return Air Filters

Importance of clean air filters for system operation and efficiency, including cleaning steps.

Operation (Manual) - Force Cooling Mode

Manual Control Button Operation

How to operate the unit manually using the indoor unit's control button when the remote fails.

Operation (Wireless Remote Controller)

Requirements

Lists requirements for using the remote controller, including the holder.

Remote Control Specifications

Technical specifications for the wireless remote control, including voltage and distance.

Wireless Remote Controller Button Functions

ONOFF Button

Turns the system on and off.

UPDOWN Buttons

Increase or decrease the indoor temperature.

SET Button

Scrolls through unit operations to select Sleep or Follow Me.

FAN Button

Cycles fan speeds through AUTO, 20%-100%.

TURBO Button

Enables rapid temperature achievement during cooling or heating.

MODE Button

Selects system operation modes such as AUTO, COOL, DRY, HEAT, FAN.

ECOGEAR Button

Controls temperature and energy efficiency in cooling mode.

OK Button

Confirms selected function or initiates auto-time sequence.

TIMER Button

Initiates auto-on or auto-off time sequences.

SWING Button

Starts or stops the louver auto swing feature.

Breeze Away Button

Avoids direct air flow by directing air away from the body.

Clean Button

Starts or stops the Active Clean function.

LED Button

Turns the LCD display back-light on or off.

Wireless Remote Controller Screen Indicators

Transmission Indicator

Lights up when the remote sends a signal to the indoor unit.

Timer Display

Shows TIMER ON or TIMER OFF status.

Silence Feature Display

Indicates when the Silence feature is active.

Fan Speed Display

Shows the selected fan speed from Silence to High.

Mode Display

Shows the current operating mode (AUTO, COOL, DRY, HEAT, FAN).

ECO Display

Indicates when the ECO feature is activated.

Gear Display

Indicates when the GEAR feature is activated.

Lock Display

Indicates when the Lock feature is activated.

TemperatureTimerFan Speed Display

Shows set temperature, fan speed, or timer setting.

Louver Swing Display

Indicates up/down louver swing operation.

Turbo Mode Display

Indicates when TURBO mode is active.

Wireless Remote Controller Operation

Auto Operation

How to set and start the unit in Auto mode.

CoolingHeating Operation

How to select COOL or HEAT mode and set fan speed.

Dehumidifying Operation

How to select DRY mode and start the unit.

Timer ONOFF Operation

How to set desired time for timer ON or OFF functions.

Silence Operation

How to activate or deactivate the Silence function.

Lock Function

How to activate and deactivate the Lock function for buttons.

Swing Function

How to activate and disable up/down louver oscillation.

Breeze Away

Prevents unit from blowing air directly on a person.

Active Clean

Removes dust, mold, and grease by freezing and thawing the coil.

Sleep

Enables automatic temperature adjustment for energy saving during sleep.

Follow Me

Allows remote temperature sensing of the room at the remote controller.

Troubleshooting

Indoor Unit Error and Status Codes

List of system error codes displayed on the indoor unit.

Operational Status Codes

List of operational status codes for various functions.

Outdoor Unit LED Status

Description of outdoor unit LED flashing patterns.

FCC Compliance Statement

Part 15.19

Statement regarding device compliance with FCC Rules.

Part 15.105 (B)

Statement on interference and limits for Class B digital devices.

RF Exposure Information

Information on FCC radiation exposure limits and proximity to antenna.

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