Daikin 668375401 User Manual

FILTER
DIFF
ROOM
SET
REMOTE
FILTER
DIFF
ROOM
SET
REMOTE
8. Minimum Cool Setpoint (45°Fto75°F)(7°Cto24.0°C) 
 AdjusttocontroltheminimumCoolsettemperatureallowed.
 Pressthe
or buttontoselect.
 Pressthe
SW6button toadvancetothenextscreen.
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ROOM
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7. 
 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
or buttontosetdeadband.
 Pressthebuttontoadvancetothenextscreen.
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ROOM
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ROOM
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6. Minimum Deadband (2°Fto9°F)(1.0°Cto4.5°C) 
 Settheminimumseparationbetweenheatsetpointand
coolsetpointinAuto ChangeoverMode.
 Pressthe
or buttontosetdeadband.
 Pressthe SW6 buttontoadvancetothenextscreen.
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ROOM
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REMOTE
12. Status Indicator Light(Lt0,1,2)
 0=Statusindicatorneveron
 1=Statusindicatoronwithrststage
 2=Statusindicatoronwithsecondstage
 Pressthe or buttontoselect.
 Note:Redlightindicatesheatingcycleandgreenlightindicatescoolingcycle.
 SlidetheModeswitchtoHeatorCooltoexitconguration.
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ROOM
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11. Maximum compressor cycles allowed per hour(-,2-6)
 -=asmanyasneeded,and2-6=maximumcycles/hour
 Pressthe or buttontoselect.
 Pressthe SW6button toadvancetothenextscreen.
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ROOM
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REMOTE
10. 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,ROOMwilldisplay
 Pressthe
or buttontoselect.
 Pressthe
SW6button toadvancetothenextscreen.
FILTER
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ROOM
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REMOTE
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ROOM
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REMOTE
9. Maximum Heat Setpoint (55°Fto90°F)(13°Cto32°C) 
 AdjusttocontrolthemaximumHeatsettemperature
allowed.
 Pressthe or buttontoselect.
 Pressthe SW6button toadvancetothenextscreen.
Cool Test
1. SlideModeswitchtoCoolmode.
2. Adjustsettemperaturesoitis5degreesbelowroomtemperature.
3. Airconditioningshouldcomeonwithinafewseconds.Statusindicatormay
comeon.
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.
CoolOffHeatAuto
Testing the Thermostat
Oncethethermostatisinstalled,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. SlideModeswitchtoHeatmode.
2. Adjustthesettemperaturesoitis5degreesabovetheroomtemperature.
3. Heatshouldcomeonwithinafewseconds.Statusindicatormaycomeon.
4. Adjustthesettemperaturesoitis2degreesbelowtheroom
temperatureandtheheatshouldturnoff.Theremaybeafandelayonyour
system.
CoolOffHeatAuto
Auto  On
Auto  On
Fan Test
1. SlideFanswitchtoOnposition.
2. Indoorfanturnson.
3. SlideFanswitchtoAutoposition.
4. Indoorfanturnsoff.
Mode of Operation
TheDaikinAuto-changeoverElectronicThermostatisatwo-stageheat,two-stagecoolthermostat.
Thethermostatactivatestherststageofheatingwhentheroomtemperatureisbelowtheheatset
temperature(bythedifferentialtemperature).Thesecondstageofheatingwillbeactivatedifthe
roomtemperaturecontinuestodrop.Theheatoutputsarestagedoff(congurable,setting7)asthe
roomtemperatureincreases.
Whentheroomtemperatureisgreaterthanthecoolsettemperature(bythedifferentialtemperature),
thecoolingdeviceisactivated.Thesecondstageofcoolingwillbeactivatediftheroomtemperature
continuestorise.Thecooloutputsarestagedoff(congurable,setting7)astheroomtemperature
drops.
Thethermostathasthefollowingoperatingmodes:OFF,Heat, CoolandAuto.InOFFmode,the
thermostatwillnotturnonheatingorcoolingdevices.IntheHeatmode,thethermostatcontrolsthe
heatingsystem.IntheCoolmode,thethermostatcontrolsthecoolingsystem.IntheAutomode,the
thermostatoperatesasanauto-changeoverthermostat.Itwillturnonheatingorcoolingasrequired.
TheindoorfancanbeturnedoninalloperatingmodesusingtheFanswitch.
Pressingthe and  buttonssimultaneouslyfor2secondscausesthethermostattooutputfrom
the“O”terminalfor5seconds.“ ”willshowonthedisplay.Thiswillresultintheunitgoingintoa
nightset-backoverride.
Pressingthe and  buttonssimultaneouslyfor10secondscausesthethermostattooutputfrom
the“O”terminalfor15seconds.“ ”willshowonthedisplay.Thiswillresultintheunitbeingreset.
Operating Modes
ThesearethepossibleoperatingmodesoftheDaikinAuto-changeoverElectronicThermostat.
Off Mode
Inoffmode,thethermostatwillnotturnontheheatingorcoolingappliances.
Note 1: The indoor fan can be activated in every mode by sliding the Auto/On fan switch to the On
position.
Note 2: Off mode is used to enter the configuration setup (by pressing SW5 and SW6
simultaneously for 5 seconds).
Cool Mode
Incoolmode,thethermostatcontrolsthecoolingsystem.
Heat Mode
Inheatmode,thethermostatcontrolstheheatingsystem.
Auto-changeover Mode
Inthismodethethermostatwillautomaticallychangefromheatmodetocoolmode,orviceversa.
Pressingthe or buttoninAutomodecausesthethermostattodisplaytheheatsettemperature
thenthecoolsettemperature.Thesettemperaturethatisdisplayedcanbechangedusingthethe 
or buttons.
Override
Press and buttonssimultaneouslyfor2secondstooverridenightsetback.Whenoverrideis
activated,“ ”willbedisplayed.
Reset
Press and buttonssimultaneouslyfor10secondstoresetthecontrolboard.“ ”willbe
displayed.
Troubleshooting
Symptom Remedy
Nodisplay Checkfor24VAC/VDCatthermostat;displayisblankwhen24VAC/VDC
isnotpresent
Systemfandoesnot
comeonproperly
Verifywiringiscorrect
Checkconguration(see“CongurationMode,”Setting2)
See“FanTest”
Thermostatturnson
andofftoofrequently
Adjusttemperaturedifferential(see“TemperatureDifferential,”
“CongurationMode,”Settings4and5)
Fanrunscontinuously CheckfanOn/Autoswitch,ONpositionrunsindoorfancontinuously
Roomtemperatureis
notcorrect
Verifywallholeispluggedwithputtyorinsulation;calibratethermostat
(see“CongurationMode,”Setting10)
ROOMdisplays Roomtemperatureoffsetisnotzero(see“CongurationMode,”Setting
10)
Statusindicator Greenlight–Coolingoperation
Redlight–Heatingoperating
StatusindicatoroptionON(see“CongurationMode,”Setting12)
Erdisplays Sensorerror–checkS1&S2connections,checkremotesensorwireand
connections,useshieldedwireforremotesensor
Problemnotlisted
above
PresstheResetbuttononce;displaywillberefreshedandanti-shortcycle
timingwillberesettozero
Daikin Auto-changeover Electronic Thermostat
Factory Default Settings
Note:
FollowingarethefactorydefaultsettingsfortheDaikin2811thermostat:
1. Heatpump 0
2. HSgE g
3. FC F
4. Differential01 1
5. Differential02 2
6. db 4
7. Stagedoutputs 1
8. LO 45
9. UP 90
10. Calibration 0
11. Maximumcompressorcyclesperhour -
12. Lt 1
Daikin Training and Development
Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For
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.
LIAF199-110-15-13

Daikin 668375401 Specifications

General

Brand	Daikin
Model	668375401
Category	Thermostat
Language	English