Lennox MWCA009S4, Service Manual

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MINI-SPLIT SYSTEMS SERVICE MANUAL
MCA Series Unit Information
CORP1907-L5
11/2020
Supersedes 8/2019
Table of Contents
1. Indoor Units ................................................3
1.1. Model Number Identification ................................... 3
1.2. Indoor Unit Specifications ....................................... 3
1.3. Indoor Unit Dimensions .......................................... 4
1.4. Indoor Unit Clearances ........................................... 5
1.5. Indoor Unit Wall Mounts ......................................... 5
2. Indoor/Outdoor Matches ...........................6
3. Air Throw Data ...........................................6
4. Power and Communication Wiring for
Systems .....................................................7
4.1. Overview ................................................................. 7
4.2. Wire Gauge ............................................................. 7
4.3. Terminal Connections ............................................. 8
5. Indoor Unit Diagrams ................................8
6. Wireless Remote ......................................10
6.1. Requirements ....................................................... 10
6.2. Remote Control Specifications ............................. 10
6.3. Function Buttons ................................................... 11
6.4. Display .................................................................. 12
6.5. Operations ............................................................ 12
6.5.1. Start/Stop Operation .............................. 12
6.5.2. Select Fahrenheit or Celsius ............... 12
6.5.3. Cool/Fan mode ..................................... 12
6.5.4. Dry Mode ................................................ 12
6.5.5. Timer Operation ..................................... 12
6.5.6. Timer ON Operation ............................... 12
6.5.7. Timer OFF Operation ............................. 13
6.5.8. Modify Timer ON/OFF settings ............... 13
7. Connection to Centralized Controller ....13
7.1. Set Indoor Unit Address for Centralized Control
(Used with VRF Only) ........................................... 13
7.2. Indoor Unit Connection Points for Centralized
Controller .............................................................. 14
7.3. Dry Mode Operation - Indoor Units ....................... 14
7.3.1. Procedure ............................................... 14
7.3.2. Dry Mode Operation Sequence .............. 14
7.4. Test Run - Indoor Units ......................................... 14
7.4.1. Test Run Instructions .............................. 14
7.4.2. Before Test Run ...................................... 14
7.5. Double-Check Pipe Connections .......................... 15
7.6. Ambient Temperature is Below 63°F (17°C) ......... 15
8. Single Zone Outdoor Units .....................16
8.1. Model Number Identification ................................. 16
8.2. Specifications ........................................................ 16
8.3. Cooling Capacity ................................................... 17
8.3.1. - 009 (208/230V) .................................... 17
8.3.2. - 012 (115V) ............................................ 18
8.3.3. - 012 (208/230V) .................................... 18
MCA Single Zone Air
Conditioning Outdoor Unit
MCWA Wall Mount Single Zone
Air Conditioning Indoor Unit
Please refer to Corp1908-L5 for indoor and outdoor unit error codes and component diagnostics.