Mitsubishi FDUA125VNPWVH - Page 24

'22 • PAC-SM-412
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(24) Fan control at heating startup
(a) Starting conditions
Atthestartofheatingoperationandaftertheendofhotstartcontrol,ifthedierenceofsettingtemperatureandreturn
airtemperatureis5°Corhigher,thiscontrolisperformed.
(b) Contents of control
(i)Samplingismadeateachminuteand,whentheindoorheatexchangertemperature(detectedwithThi-R)is37°Cor
higher,presentnumberofrevolutionsofindoorfanspeedisincreasedby10min
-1
.
(ii)Iftheindoorheatexchangertemperaturedropsbelow37°Catnextsampling,presentnumberofrevolutionsofindoor
fanspeedisreducedby10min
-1
.
(c) Ending conditions
IndoorfanspeedisreducedtothesettingairowratewhenthecompressorOFFisestablishedandat30minutesafter
thestartofheatingoperation.
(25) Room temperature detection temperature compensation during heating
With the standardspecication, the compressoris turned ON/OFFwith the thermostatsetting temperature. When the
thermostatislikelytoturnOFFearlierbecausetheunitisinstalledattheceilingwherewarmairtendstoaccumulate,the
settingcanbechangedwiththewiredremotecontrolindoorunitfunction“
”. The compressor and the heater are
turnedON/OFFatoneofthesettingtemperature+3,+2or+1°Cinordertoimprovethefeelingofheating.Thesetting
temperature,however,hastheupperlimitof30°C.
Compressor Compressor
Standard
Operation
Stop
Setting temperature
-1 +1
Room temperature (°C)
Operation
Stop
Setting temperature
+2 +4
Room temperature (°C)
When it is set at +3°C
(26) Return air temperature compensation
Thisisthefunctiontocompensatethedeviationbetweenthedetectiontemperaturebythereturnairtemperaturesensor
andthemeasuredtemperatureafterinstallingtheunit.
(a) Itisadjustableintheunitof0.5°Cwiththewiredremotecontrolindoorunitfunction“RETURNAIRTEMP”.
 •+1.0°C,+1.5°C,+2.0°C  •-1.0°C,-1.5°C,-2.0°C
(b) Compensated temperature is transmitted to the remote control and the compressor to control them.
Note(1)Thedetectiontemperaturecompensationiseectiveontheindoorunittemperaturesensor only.
(27) High power operation (RC-EXZ3A only)
Itoperatesatwiththesettemperaturexedat16°Cforcooling,30°Cforheatingandmaximumindoorfanspeedfor 15
minutes maximum.
(28) Energy-saving operation (RC-EXZ3A only)
Itoperateswiththesettingtemperaturexedat28°Cforcooling,22°Cforheatingor25°Cforauto.Whenfancontrolin
cooling/heatingthermo-OFF setting is“Setfanspeed”, fan speedduringthermo-OFFis changed to“Low”.(Maximum
capacityisrestrictedat80%.)
(29) Warm-up control (RC-EXZ3A only)
Operationwillbestarted5to60minutesbeforeuseaccordingtotheforecastmadebythemicrocomputerwhichcalculates
whentheoperationshouldbestartedinordertowarmuptheindoortemperaturenearthesettingtemperatureatthesetting
time of operation start.
(30) Home leave mode (RC-EXZ3A only)
Whenthe unit is notused for alongperiod of time,theroom temperature ismaintainedat a moderatelevel,avoiding
extremely hot or cool temperature.
(a)Coolingorheatingisoperatedaccordingtotheoutdoortemperature(factorysetting35°Cforcooling,0°Cforheating)
andthesettingtemperature.(factorysetting33°Cforcooling,10°Cforheating)
(b)SettingtemperatureandindoorfanspeedcanbesetbyRC-EXZ3A.
(31) Auto temperature setting (RC-EXZ3A only)
Settingtemperature isadjustedautomaticallyat theadequatetemperaturethe center settingtemperatureis24°Cby
correctingtheoutdoorairtemperature.