Daikin 910121746 - Configuration Mode Settings; Thermostat Operation and Testing; Operating Modes; Testing the Thermostat

Configuration Mode Settings
ThesetupscreensforCongurationModeareasfollows:
1. Temperature Scale (ForC)
ChooseFahrenheitorCelsius.
 Presstheupordownbuttontoselect.
 Pressthe right buttontoadvancetothenextscreen.
2. 1
st
Stage Temperature Differential(1°Fto5°F)(0.5°Cto2.5°C)
Setthenumberofdegreesbetweenyour“setpoint”temperatureandyour“turnon”
temperature.
 Presstheupordownbuttontosetdifferentialvalue.
 Presstheright buttontoadvancetothenextscreen.
4. Staged Off Outputs
 Selectwhethertheoutputsforheatingandcoolingarestagedoffindependentlyor
aresatisedsimultaneously.
 1=outputsstagedoffindependently
 0=outputsoffsimultaneously
 Presstheupordownbuttontoset.
 Presstheright buttontoadvancetothenextscreen.
5. Minimum Deadband(1°Fto9°F)(1°Cto5°C)
 SettheminimumseparationbetweenheatsetpointandcoolsetpointinAuto
ChangeoverMode.
 Presstheupordownbuttontosetdeadbandvalue.
 Presstheright buttontoadvancetothenextscreen.
3. 2
nd
Stage Temperature Differential(1°Fto5°F)(0.5°Cto2.5°C)
 Setthenumberofdegreesbetweenwhenstage1turnsonandwhenstage2turnson.
 Presstheupordownbuttontosetdifferentialvalue.
 Presstheright buttontoadvancetothenextscreen.
6. Maximum Heat Setpoint(55°Fto90°F)(13°Cto32°C)
 Adjusttocontrolthemaximumheatsettemperatureallowed.
 Presstheupordownbuttontoselect.
 Presstherightbuttontoadvancetothenextscreen.
7. Minimum Cool Setpoint(55°Fto90°F)(13°Cto32°C)
 Adjusttocontroltheminimumcoolsettemperatureallowed.
 Presstheupordownbuttontoselect.
 Presstherightbuttontoadvancetothenextscreen.
9. Temperature Sensor(1-3)
 1.Onlyon-boardsensordeterminesroomtemperature.
 2.Onlyremotesensordeterminesroomtemperature.
 3.Averagetemperatureofon-boardandremotesensor.

Note:If there is no remote sensor, option 1 must be selected.
 Presstheupordownbuttontoselect.
 Pressthecongurationbuttonfortwosecondstoexitconguration.
8. Room Temperature Offset(+9°Fto-9°F)(+4.5°Cto-4.5°C)
 Adjusttocalibratedisplayedroomtemperaturetomatchactualroomtemperature.

Note:When not set to 0, will display.
 Presstheupordownbuttontoselect.
 Presstherightbuttontoadvancetothenextscreen.
Mode of Operation
The910121746isanon-programmable,manualorautochangeover,2-stageheat,2-stagecoolthermostat.An
outdoorsensorcanbeusedtomonitortheoutdoortemperature.
Thethermostatactivatestheheatingappliancewhentheroomtemperatureisbelowthesetheattemperature(by
thedifferentialtemperature).The910121746willstopoutputtingwhenthecallforheathasbeensatised.
Whentheroomtemperatureisgreaterthanthesetcooltemperature(bythedifferentialtemperature),thecooling
deviceisactivated.The910121746willstopoutputtingwhenthecallforcoolingissatised.
The910121746hasfourpossibleoperatingmodes:OFF,Heat,CoolandHeat & Coolmode.Inoffmode,the
thermostatwillnotturnonheatingorcoolingdevices.Themanualfancanbeturnedoninalloperatingmodesusing
thefanbutton.Inheatmode,thethermostatcontrolstheheatingsystem.Inthecoolmode,thethermostatcontrols
thecoolingsystem.Inheat&coolmode,thethermostatcontrolsboththeheatingandcoolingsystems.
PressingtheUPandDOWNbuttonssimultaneouslyfor2secondsthenreleasingthemcausesthethermostatto
outputfromthe“O”terminalfor5seconds.“Or”willshowonthedisplay.Thiswillresultintheunitgoingintoanight
set-backoverride.
PressingtheUPandDOWNbuttonssimultaneouslyfor5secondscausesthethermostattooutputfromthe“O”
terminalfor10seconds.“rS”willshowonthedisplay.Thiswillresultintheunitbeingreset.
Button Functions
UP–Usedtoincreasethetime,settemperaturesandtoadjustconguration
settings.
DOWN–Usedtodecreasethetime,settemperaturesandtoadjust
congurationsettings.
SYS (left)– UsedtochangefromOFF,HEAT,COOLandAUTOchangeover
modes
FAN (right)–Usedtoturnonandofftheindoorfan.
DOWN and SYS–Pressedsimultaneouslytodisplayoutdoorremotetemperatureifremotesensoris
connected.
UP and DOWN– Usedtooverridenightsetbackorresettheunit.
FAN
(right)
Down
button
Up
button
SYStem
(left)
Testing the Thermostat
Oncethethermostatiscongured,itshouldbethoroughlytested.
 CAUTION! : Donotenergizetheairconditioningsystemwhentheoutdoortemperatureisbelow50
degrees.Itcanresultinequipmentdamageorpersonalinjury.
Heat Test
1.PressSYS(left)buttonuntilheatmodeisdisplayed.
2.Adjustthesettemperaturesoitis5degreesabovetheroomtemperature.
3.Heatshouldcomeonwithinafewseconds.
4.Adjustthesettemperature2degreesbelowtheroomtemperatureandtheheat
shouldturnoff.Theremaybeafandelayonyoursystem.
Cool Test
1.PressSYS(left)buttonuntilcoolmodeisdisplayed.
2.Adjustsettemperaturesoitis5degreesbelowroomtemperature.
3.A/Cshouldcomeonwithinafewseconds.
4.Adjustthesettemperature2degreesabovetheroomtemperatureandtheA/C
shouldturnoff.Theremaybeafandelayonyoursystem.
Fan Test
1. PressFAN(right)button.Fandisplays.IndoorfanturnsON.
2. PressFAN(right)button.IndoorfanturnsOFF.
OFF
Operating Modes
Therearevepossibleoperatingmodesforthe910121746.Off,Cool,Heat,andCool&Heatmodesareaccessed
bypressingtheSYS(left)button.ProgrammodeisaccessedbypressingtheSYS(left)andFAN(right)buttons
simultaneously.
OFF Mode
• Inthismode,thethermostatwillnotturnontheheatingorcoolingdevices

Note:The indoor fan can be turned on manually in every operating mode by
pressing the FAN (right) button. The word FAN shows on the display and
the fan icon
appears when the fan operates.
OFF
Heat Mode
• Inthismode,thethermostatcontrolstheheatingsystem.Whentheheatoutputs,
theameicon
apprearsonthedisplay.
Cool Mode
• Inthismode,thethermostatcontrolsthecoolingsystem.Whenthecooling
outputs,thesnowakeicon apprearsonthedisplay.
Cool and Heat Mode (Auto Changeover)
• Inthismode,thethermostatcontrolsthecoolingandheatingsystems,automatically
changingoverfromonetotheotherasneeded.
• Thetimingdisplayalternateswiththesettemperatureevery10secondsinthecool
andheatmode.
Symptom Remedy
Nodisplay Checkfor24VACatthermostat;displayisblankwhen24VACisnot
present
Allthermostatbuttonsareinoperative Verify24VACispresent;unitlocksoutwhen24VACisnotpresent
Noresponsewithrstbuttonpress Firstbuttonpressactivatesbacklightonly
Thermostatturnsonandofftoo
frequently
Adjusttemperaturedifferential(seeCongurationModeSettings2&3)
Fanrunscontinuously PressFAN(right)buttontoturnfanoff
Statusindicatoron WSHPstatusblinkcode
Roomtemperatureisnotcorrect Calibratethermostat(seeCongurationModeSetting8)
Ifremotesensorisused,checkS1andS2terminalconnections
ondisplayinsteadofroom
temperature
CheckforabadconnectionatS1andS2terminals,ifused
(seeCongurationModeSetting9)
HeatorCoolnotcomingon Verifywiringiscorrect,gentlypulloneachwiretoverifythereisagood
connectionatterminalblock
Alarmlighton Unitinalarmlockoutcondition
Problemnotlistedabove PressResetbuttononce*
* Reset Button Function: Displayisrefreshedandcongurationsettingsareunchanged.
Troubleshooting
Daikin Training and Development
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training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com and click on Training,
or call 540-248-9646 and ask for the Training Department.
Warranty
All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product
Warranty. Consult your local Daikin Representative for warranty details. Refer to Form 933-430285Y. To find your
local Daikin Representative, go to www.DaikinApplied.com.
Aftermarket Services
To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787). To find your
local service office, visit www.DaikinApplied.com or call 800-432-1342. This document contains the most current
product information as of this printing. For the most up-to-date product information, please go to
www.DaikinApplied.com.
Products manufactured in an ISO certified facility.
LIAF179-110-15-13