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 Specifications
....................................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.
•
Regularly inspect and clean air filters.
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.