COMFORT-AIRE SMA 24 Owner's manual

Brand: COMFORT-AIRE

Model: SMA 24

Category: Remote controls

Type: Owner's manual

Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com

OWNER’S MANUAL

SMA/SMH 09/12/18/24

Version C

Single Zone Ductless Mini-Split System

A/C and Heat Pump

SMA/SMH OWNER’S MANUAL Heat Controller, Inc.

Table of Contents

Safety Precautions

Warnings and Cautions ............................................................... 2

Operating Instructions

Part Names .................................................................................. 3

 DisplayPanelIdentication....................................................... 3-4

Features and Functions ............................................................ 5-6

 AirowDirectionalControl ........................................................... 7

Typical Operational Occurrences.............................................. 8-9

Care and Maintenance

Care and Maintenance ......................................................... 10-11

Troubleshooting Tips

Troubleshooting Tips ................................................................. 12

CAUTION!

•Contactanauthorizedservicetechnicianforrepairormaintenanceofthisunit.

•Installationworkmustbeperformedinaccordancewithlocalandnationalelectricalcodesbyauthorizedper-

sonnel only

SMA/SMH OWNER’S MANUAL

• Do not attempt to install this air conditioner by yourself.

• This unit contains no user-serviceable parts. Always consult authorized service personnel for repairs.

• Do not insert or objects into the outlet or intake grilles.

• Do not start and stop air conditioner operation by disconnecting the power supply.

• Take care not to damage the power supply wiring.

• In the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the

power supply, and consult authorized service personnel.

• Provide occasional ventilation during use.

• Do not direct air at or heating apparatus.

• Avoid installing the air conditioner near a or other heating apparatus.

• Do not climb on, or place objects on, the air conditioner.

• Do not hang objects from the indoor unit.

• Do not set vases or water containers on top of the air conditioner.

• Do not expose the air conditioner directly to water.

• Do not operate the air conditioner with wet hands.

• Turn off power source when not using the unit for extended periods.

• Do not drink the water drained from the air conditioner.

• Connection valves become hot during Heating; handle with care.

• Do not apply any heavy pressure to evaporator

• Operate only with air installed.

• Do not block or cover the intake or outlet grille.

• Ensure that any electronic equipment is at least 3 feet (1m) away from either the indoor or outdoor

units.

• Do not use gases near the air conditioner.

CAUTION!

WARNING!

To prevent injury to the user, other people and/or to property, the following instructions must be followed. Incorrect operation

due to ignoring these instructions may cause harm or damage. The seriousness is by the following indications:

WARNING!

CAUTION!

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to property.

Never do this.

Always do this.

Meanings of symbols used in this manual are as shown below:

Heat Controller, Inc.

SMA/SMH OWNER’S MANUAL Heat Controller, Inc.

The display panel of the indoor unit will look like one of the following:

NOTE: For cooling only models ≥18000Btu/h indicator light

is for FAN ONLY, not defrost.

AUTO indicator

This indicator illuminates when the air conditioner is in AUTO operation.

DEFROST indicator (for cooling & heating models only)

This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air

control feature is activated in heating operation.

The display panel of the indoor unit will look like one of the following:

NOTE: For cooling only m odels ≥18000Btu/h indicator light

is for FAN ONLY, not defrost.

AUTO indicator

This indicator illuminates when the air conditioner is in AUTO operation.

DEFROST indicator (for cooling & heating models only)

This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air

control feature is activated in heating operation.

SMA/SMH OWNER’S MANUAL Heat Controller, Inc.

3 TEMPERATURE indicator

Displays the temperature settings when the air conditioner is operational.

4 OPERATION /POWER indicator

This indicator

after power is on and illuminates when the unit is in operation. The operation in-

dicator lights

rapidly times per second) when safety protection features come into operation.

5 TIMER indicator

This indicator illuminates when the TIMER is set ON/OFF.

SMA/SMH OWNER’S MANUAL Heat Controller, Inc.

Mode Temp

Ambient Operating Conditions

Fahrenheit Celsius

Cooling

Outdoor 5 to 109.4 -15 to 43

Indoor =62.6 =17

Heating

Outdoor 5 to 75.2 -15 to 24

Indoor =86 =30

Dehumidication

Outdoor 23 to 109.4 -5 to 43

Indoor >17 >62.6

See chart below for operating conditions:

Low Ambient Operation and Crank Case Heater Feature:

Whencoolingisneededyearround,includingwhenoutdoortemperaturesareapttofallbelowfreezing,ourS

Seriesductlessmini-splitsystemswillcontinuetowork,astheycomewithfactoryinstalledlowambientcon-

trols.Thelowambientfeatureworksbyregulatingtheheadpressurebyvaryingtheamountofairowthrough

thecondenser,whichhelpstopreventevaporatorfreezeupsandlowpressureproblemsduetolowambient

outdoortemperatures.Lowambientoperationisagreatfeaturefortemperature/humiditysensitiveenviron-

mentsorapplicationssuchasserver/computerrooms,supermarkets,restaurants,orcoolingtowerfans.

Additionally,acrankcaseheaterisrequiredandfactoryinstalled,asitisneededforusewiththelowambient

controls.Thecrankcaseheaterminimizesliquidrefrigerantmigrationtothecompressorwhenthecompressor

isnotoperatingandhelpstokeepthecompressoroilwarmenoughsothatitremainsuidtopreventslugging.

Crankcaseheatersalsoassisttogreatlyreduceheatlosstoambientair.Together,thelowerambientfeature

combinedwiththefactoryinstalledcrankcaseheater,willnotonlyallowtheairconditionertocoolyearround,

butwillalsopreventcompressorfailureinlowambientconditions.

Manual Operation

Manualoperationcanbeusedtemporarilytoruntheairconditionerwithoutusingtheremotecontroller.Thisfea-

turecanalsobeusedtotesttheunitduringinstallationandtroubleshootingbyanauthorizedservicetechnician.

1 Openandliftthefrontpanelupuntilitstopsand

makesaclickingsound.

2 Bypressingthemanualcontrolbutton,theunit

willbeplacedintoforcedAUTOoperationmode.

3 Closethepanelrmlytoitsoriginalposition.

CAUTION

•Onceyoupushthemanualbutton,theoperationmode

willchangeinthefollowingorder:

•Bypushingthebuttontwice,theunitwillbeplaced

intoforcedCOOLmode,whichcanbeusedfortesting

purposes.

•Bypushingthebuttonathirdtime,theairconditioner

willstopoperatingandturnoff.

•Torestoreuseoftheremotecontrollertocontrolthe

unit,simplybegintooperatetheunitwiththeremote

controller.

AUTO COOL OFF

Features and Functions:

Heat Controller, Inc. OWNER’S MANUAL SMA/SMH

AUTO operation

•WhenyousettheairconditionertoAUTOmode,itwillauto-

maticallyselectcooling,heating(heatpumpmodelsonly),or

fanonlyoperationdependingonwhattemperatureyouhave

selected and the actual room temperature.

•Theairconditionerwillcontrolroomtemperatureautomatically

around the temperature set point you select.

•IftheAUTOmodeisuncomfortable,youcanchangedesired

temperature settings manually.

ECONOMY/SLEEP operation

WhenyoupushECONOMYbuttononremotecontrollerit

activatesSLEEPmode.Duringcooling,heating(heatpump

only),orAUTOoperation,theairconditionerwillautomatically

increase(cooling)ordecrease(heating)2°F(1°C)perhour.The

settemperaturewillbecomesteady2hourslater.TheSLEEP

modewillturnoffafter7hoursandresortbacktotheprevious

settings.Thefanspeedwillbeautomaticallycontrolled.This

featurecanmaintainthemostcomfortabletemperaturewhile

yousleepandsavemoreenergyduringuse.

DRY MODE/DEHUMIDIFYING operation

•Thetemperatureisregulatedwhiledehumidifyingbyrepeat-

edlyturningonandoffofthecoolingoperationorfanonly.The

fanspeedindicatorwilldisplayAUTOandlowspeedwillbe

used.

Optimal Usage Tips:

Toachieveoptimalperformance,pleasenotethefollowing:

•Adjusttheairowdirectioncorrectlysothatitisnotdirected

directlyblowingonpeople/animals.

•Adjustthetemperaturetoachievethehighestcomfortlevel.

Donotadjusttheunittoexcessivetemperaturelevels.

•WheninCOOLorHEATmodescloseanyopendoorsand

windowswithintheroomthattheunitisoperatingintoin-

creaseperformance.

•UseTIMERONbuttonontheremotecontrollertoselecta

timeyouwanttostartyourairconditioner.

•Donotputanyobjectsnearairinletorairoutlet,astheef-

ciencyoftheairconditionermaybereducedandtheaircondi-

tionermaystoprunningduetoairowblockages.

•Cleantheairlterperiodically,otherwisecoolingorheating

performancemaybereduced.

•Donotoperateunitwithlouversinaclosedposition

SMA/SMH OWNER’S MANUAL Heat Controller, Inc.

• Donotoperatetheairconditionerforlongperiods

withtheairowdirectionsetdownwardincoolingor

dehumidifyingmode.Otherwise,condensationmay

occuronthesurfaceoftheverticallouvercausing

moisturetodropontotheoororonfurnishings.

• Donotmovetheverticallouvermanuallyunlessitis

necessary.Alwaysusetheremotecontroller.

• Whentheairconditionerisstartedimmediatelyafter

itwasstopped,theverticallouvermightnotmovefor

approximately10seconds.

• Openangleoftheverticallouvershouldnotbesettoo

small,asCOOLINGorHEATINGperformancemaybe

impairedduetotoomuchrestrictionofairowarea.

• Donotoperateunitwithlouversinclosedposition.

• Whentheairconditionerisconnectedtopower(initial

power),theverticallouvermaygenerateasoundfor10

seconds,thisisanormaloperationfunction.

CAUTION!

Airow Direction Control

NOTES:

•Usetheremotecontrollertoadjustthehorizontallouver

•Manuallyadjusttheverticallouver.

To set the vertical air ow(Up–Down) direction

Performthisfunctionwhiletheunitisinoperation.Use

theSWINGbuttonontheremotecontrollertoadjustthe

airowdirection.Theverticallouvercanbemovedat

arangeof6°foreachpressoftheswingbutton,andif

pressingmorethan2seconds,theautomaticswingfunc-

tionwillbeactivatedandthelouverswillmoveupand

downautomaticallytocreateabreeze-likeeffect.

PleaserefertotheREMOTE CONTROLLER

OPERATION MANUALfordetails.

To set the horizontal air ow direction (left–right)

•Movethelefttorightlouvermanuallytoadjusttheair

owinthedirectionyouprefer.

IMPORTANT:Beforeadjustingthelefttorightlouvers,

thesupplypowermustbedisconnected.

Verticallouver

Heat Controller, Inc. OWNER’S MANUAL SMA/SMH

Typical Operational Occurrences

Thefollowingeventsmayoccurduringnormaloperation.

1. Protection of the air conditioner.

Compressor protection

•Iftheunitisstoppedandthenimmediatelyrestartedagain,thecompressorwillnotoperateforabout

3 minutes in order to protect the compressor.

Anti-cold air (heat pump models only)

•TheunitisdesignednottoblowcoldairinHEATmode,whentheindoorheatexchangerisinoneof

thefollowingthreesituationsandthesettemperaturehasnotbeenreached.

A)Whenheatinghasjuststarting.

B)Defrostingisoccurring

C)Lowtemperatureheatingisoccurring

Defrosting (Cooling and heating models only)

•Theindoororoutdoorfanstoprunningwhendefrosting(heatpumpmodelsonly).

•Frostmayaccumulateontheoutdoorunitduringheatcyclewhenoutdoortemperatureislowandhu-

midityishigh,resultinginlowerheatingefciencyoftheairconditioner.

•Duringthiscondition,airconditionerwillstoptheheatingoperationandstartdefrostingautomatically.

•Defrosttimemayvaryfrom4to10minutesaccordingtotheoutdoortemperatureandtheamountof

frostbuildupontheoutdoorunit.

2. Mist or steam are being emitted

•Awhitemistmayemitfromtheindoorunitduetoalargetemperaturedifferencebetweenairinletand

airoutletinCOOLmodeinanindoorenvironmentthathasahighrelativehumidity.

•Awhitemistmayemitduetomoisturegeneratedfromthedefrostingprocesswhentheairconditioner

restartsinHEATmodeoperationafterdefrosting.

3. Typical sounds

•Youmayhearalowhissingsoundwhenthecompressorisrunningorhasjuststoppedrunning.This

soundisthesoundoftherefrigerantowingorcomingtoastop.

•Youcanalsohearalow“squeak”soundwhenthecompressorisrunningorhasjuststoppedrunning.

Thisiscausedbyheatexpansionandcoldcontractionoftheplasticpartsintheunitwhenthetempera-

ture is changing.

•Anoisemaybeheardduetolouverrestoringitsoriginalpositionwhenpowerisrstturnedon.

•Asizzlingsoundmaybeheardoccasionallywhentheunitisdefrosting.

4. Dust is blown out from the indoor unit

•Thisisanormalconditionwhentheairconditionerhasnotbeenusedforalongtimeorduringrstuse

oftheunitandanaccumulationofdusthasformedontheunit’soutlet.Cleaningdustoffoftheunit

beforeoperationwillpreventthis.

5. A peculiar smell comes out from the indoor unit

•Thisiscausedbytheindoorunitgivingoffsmellspermeatedfrombuildingmaterial,fromfurniture,or

smoke.Aburningsmellcouldmeanthereissomethingwrongwiththeunit.Powerofftheunitandcall

anauthorizedservicer.

6. Operating mode changes to FAN ONLY mode

•Whentheindoortemperaturereachesthetemperaturesetpointonairconditioner,thecompressorwill

stopautomatically,andtheairconditionermodechangestoFANonlymode.Thecompressorwillstart

againwhentheindoortemperaturerisesabovethesetpointintheCOOLmodeorfallsbelowtheset

pointintheHEATmode(heatpumponlymodels).

SMA/SMH OWNER’S MANUAL Heat Controller, Inc.

7. Condensation

•Drippingwatermaygenerateonthesurfaceoftheindoorunitwhencoolinginrelativelyhighhumidity.

AdjusttheverticallouvertothemaximumairoutletpositionandselectHIGHfanspeed.NOTE:Water

coulddropontotheoororobjectsbelowtheindoorunit.

8. Heating mode (heat pump models only)

•Theairconditionerdrawsinheatfromtheoutdoorunitandreleasesitviatheindoorunitduringheat-

ingoperation.Whentheoutdoortemperaturefalls,heatdrawninbytheairconditionerdecreases

accordingly.Atthesametime,theheatloadoftheairconditionerincreasesduetolargerdifference

betweenindoorandoutdoortemperature.Ifacomfortabletemperaturecan’tbeachievedbytheair

conditioner,wesuggestyouuseasupplementaryheatingdevice.

9. Auto-restart function

•Powerfailureduringoperationwillstoptheunitcompletely.

•ForunitswiththeAuto-restartfeature,whenthepowerrestores,theunitrestartsautomaticallyusing

theprevioussettingspreservedbythememoryfunctionoftheunit.Timersettingsmayneedtobe

adjustedafterapowerfailure.

10. Electrical interference

•Electronicequipmentwhichuseswirelessradiotransmitterswithin3ft(1m)oftheairconditioningunit

maycausetheunittomalfunction.Disconnecttheunitwithpowerandthenre-connecttheunitwith

poweragain.PushtheON/OFFbuttonontheremotecontrollertorestartoperation.Ensurethattheair

conditionerunitisasfarawayfromanyelectronicinterferencesourcesaspossible,otherwisewireless

interferencecanoccur.

Heat Controller, Inc. OWNER’S MANUAL SMA/SMH

Care and Maintenance

•Donotuseanoverlywetclothtocleantheunitas

it may damage the electronic components. A damp

clothcanbeusedifneeded.

•Donotuseachemicallytreatedclothordusterto

clean the unit.

•Donotusebenzine,paintthinner,polishing

powder,orsimilarsolventsforcleaning.These

maycausetheplasticsurfacetocrackordeform.

•Neverusewaterhotterthan104°F(40°C)toclean

thefrontpanel,itcouldcausedeformationor

discoloration.

CAUTION!

Cleaning the Grille, Case and Remote Controller

•Turnthesystemoffbeforecleaning.Toclean,wipe

withasoft,drycloth.Donotusebleachorabrasives.

NOTE: Supply power must be disconnected before

cleaning the indoor unit.

Cleaning the Air Filter

Acloggedairlterreducesthecoolingefciencyof

thisunit.Pleasecleanthelteronceevery2weeks.

1.Lifttheindoorunitpaneluptoanangleuntilitstops

withaclickingsound.

2.Holdthehandleoftheairlterandliftitupslightly

totakeitoutfromthelterholder,thenpullitdown-

wards.

3.RemovetheAIRFILTERfromtheindoorunit.

•CleantheAIRFILTERoncetwoweeks.

•CleantheAIRFILTERwithavacuumcleaneror

water,thendryitinacoolplace.

Continued on next page

SMA/SMH OWNER’S MANUAL Heat Controller, Inc.

• Donottouchthemetalpartsoftheunitwhenremoving

thelter.Injuriescanoccurwhenhandlingsharpmetal

edges.

• Donotusewatertocleaninsidetheairconditioner.

Exposuretowatercandestroytheinsulationorelectrical

components,leadingtopossibleelectricshock.

• Whencleaningtheunit,rstmakesurethatthepower

andcircuitbreakerareturnedoff.

CAUTION!

4.Removetheairfresheninglter(optionalonsome

models)fromitssupportframe

•Cleantheairfresheninglteratleastonceamonth

withavacuumclearner,andreplaceitevery4-5

months.

5.Installtheairfresheninglterbackintoposition.

6.Inserttheupperportionofairlterbackintothe

unittakingcarethattheleftandrightedgeslineup

correctlywhileplacingthelterintoitsoriginalposition.

Maintenance:

Ifyoudonotplantousetheunitforanextendedperiod

oftime,performthefollowing:

(1)Operatethefanforabouthalfadaytodrythe

insideoftheunit.

(2)Stoptheairconditioneranddisconnectpower.Re-

movethebatteriesfromtheremotecontroller.

(3)Theoutdoorunitrequiresperiodicmaintenance

andcleaning.Donotattempttodothisyourself.

Contactanauthorizedservice.

Check before operation (after extended period of

non-use):

•Checkthatthewiringisnotbrokenoffordisconnected.

•Checkthattheairlterisinstalled.

•Checkiftheairoutletorinletisblockedaftertheair

conditionerhasnotbeenusedforalongtime.

Heat Controller, Inc. OWNER’S MANUAL SMA/SMH

Troubleshooting Tips

Stoptheairconditionerimmediatelyifoneofthefollowingerrorsoccurs.Disconnectthepowerandcontact

anauthorizedservicer.

Callfor

serviceif

OPERATIONindicatorlightashesrapidly(5timeseverysecond)andthiscan’tbexedbydis-

connectingthepowerandthenreconnectingit.

Fuseblowsorcircuitbreakertripsfrequently

Otherabnormalsituations(suchasburningsmells)thatcan’tberesolvedusingthestepsoutlined

below.

Symptoms Possible Cause/Things to Check What should be done?

Unitdoes

no start or

operate at

all

Istherepowersuppliedtotheunit?

Waitforthepowertoberestoredorcallan

electriciantoaddressanypowersupplyproblem.

Fusemayhaveblownoutoracircuit

breakerhasbeentripped.

Replacethefuseoripthecircuitbreaker.

Batteries in remote controller may be dead

or installed incorrectly.

Replace the batteries and ensure the polarities

are correct.

Istheunit’stimerset? Wait or cancel timer setting.

Poor cooling

or heating

(heatpump

modelsonly)

performance

Inappropriate temperature setting. Set temperature correctly.

Airltermaybeblocked Cleantheairltertopreventairowblockages.

Doorsorwindowsareopen.

Closethedoorsorwindowswithinthearea

beingcooled/heatedtoincreaseefciencyand

performance.

Airinletoroutletofindoororoutdoorunit

areblocked.

Clearobstructionsaway,thenrestarttheunit.

Compressortimedelayhasbeenactivated

Waitapproximately3minutesforthecompressor

to turn on and the unit to begin cooling/heating.

Iftheproblempersistsafterperformingthesechecks,orifyounoticeburningsmells,ortheoperation

indicatorlightashesrepeatedly,immediatelystopoperation,disconnectthepower,andcallanauthorized

servicecenter.

04/2009

06/2011

COMFORT-AIRE SMA 24 Owner's manual

Brand: COMFORT-AIRE

Model: SMA 24

Category: Remote controls

Type: Owner's manual

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COMFORT-AIRE SMA 24 Owner's manual

COMFORT-AIRE SMA 24 Owner's manual

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