Lennox MCA Series Service Manual

1
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Identication ................................... 3
1.2. IndoorUnitSpecications ....................................... 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Specications ............................. 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Identication ................................. 16
8.2. Specications........................................................ 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.

Lennox MCA Series Specifications

General

Brand	Lennox
Model	MCA Series
Category	Air Conditioner
Language	English