Lennox MHA Series Service Manual

11
WARNING
Donotmixoldandnewbatteriesorbatteriesofdifferent
types.
Donotleavethebatteriesintheremotecontrollerifthe
controllerwillnotbeusedforanextendedamountoftime.
Disposeofusedbatteriesfollowinglocalandstatewaste
managementstandards.
Select Fahrenheit or Celsius
PressandholdtheUpandDownbuttonsatthesametime
forthreesecondstotogglebetweenFahrenheitandCelsius.
NOTE: To Set the Operation Mode
PresstheModebuttontoscrollthroughthemodeselections.
• Auto–Systemoperatesincoolingorheatingmodeas
determinedbythesetpointandtheroomtemperature.
• Cool–Systemoperatesincoolingmode.
• Dry–Systemremoveshumidityaccordingtopreset
conditions(fanspeedandsetpointtemperature,nota
humidistatsensor).Cannotadjustfanspeed.
• Heat–Systemoperatesinheatingmode.
• Fan–ThisisforFanonly,noheatingorcooling.
To set (or change) the room temperature setting
(setpoint)
Presstheupanddownarrowbuttonstoadjustthesetpoint.
Auto Mode
1. PressthePowerbutton,anLEDlightontheindoorunit
displays.
2. PresstheModebuttonuntilthedisplayshowsAUTO.
3. Adjust temperature setpoint using up and down arrow
buttons(range62°F–86°F).
NOTE: Fan speed is auto and is not adjustable.
Cool/Heat/Fan mode
1. PresstheModebuttontoselectCool,Heat,orFan.
2. Adjustthetemperaturesetpointusingupanddownarrow
buttons(range62°F–86°F).
3. PresstheFan SpeedbuttontoselectAuto,Low,Med,
or Highfanspeed.
NOTE: Temperature set point is not displayed in Fan
mode.
Dry Mode
1. PressthePowerbutton.AnLEDlightontheindoorunit
displays.
2. PresstheModebuttontoselectDry.
3. Adjust the temperature set point using up and down
arrowbuttons.
NOTE: Fan speed is not adjustable in dry mode. Using
dry mode will over shoot the set point by 6 - 8
degrees. There is no humidity sensor.
Timer Operation
TimerONandTimerOFFareusedtoturnonandturnoffthe
indoorunitatselectedintervals.
Timer ON Operation
1. PresstheTimer ONbutton.TheTimerONicon,thelast
auto-ontime,and“h”willdisplay.
2. Pressthe Timer ON buttonagaintoset the amount of
timebeforetheindoorunitbeginsoperation.Eachpress
will increase the time in half hour increments until 10
hours,thentheincrementbecomes1hour.
Timer OFF Operation
1. Pressthe Timer OFFbutton. TheTimer OFF icon, the
lastauto-offtime,and“h”willdisplay.
2. PresstheTimer OFFbuttonagaintosettheamountof
timebeforetheindoorunitstopsoperation.Eachpress
will increase the time in half hour increments until 10
hours,thentheincrementbecomes1hour.
Modify Timer ON/OFF settings
1. PresseithertheTimerONbuttonortheTimerOFFbutton
tomodifythatsetting.
2. Usetheuparrowanddownarrowbuttonstochangethe
timedoperationintervals.
3. Setthetimerto0.0toturnofftimedoperation.
6. Connection to Centralized Controller
6.1. Set Indoor Unit Address for Centralized
Control (Used with VRF Only)
All indoor units connected to a centralized controller must
haveauniqueaddress.UsetheS1dipswitchandtheS2
dialswitchtosettheaddressforeachindoorunit.Thetable
belowshowshowtosettheuniqueaddresses.
Allindoorunitsarefactorysetto“0”.Tochangetheaddress
to“1”,movethedialswitchtothe1position,donotadjust
thedipswitches.Tochangetheaddressto“35”,movedip
switch1totheUPpositionandmovethedialswitchtothe
3position.

Lennox MHA Series Specifications

General

Brand	Lennox
Model	MHA Series
Category	Air Conditioner
Language	English