Hitachi RAC-50WX8 - Page 49

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Heating Basic Operation
Heating set temperature
(remote control set
temperature + SHIFTW)
SFTDSW
Dash periodDash period
Start
Start / Stop switch
Defrost signal
Indoor fan
Operation lamp
Reversing valve (heating "on" mode)
Max.
Rating
0
Min.
Outdoor fan
Compressor speed
Ultra-Lo
Ultra-Hi
Lo
Silent Sleep
Med
Hi
Max. 3min.
Room temperature Room temperature – outdoor temperature outdoor temperature≧it is Ultra high speed when it is RTOSTA it is Ultra high speed when it is RTOSTA Room temperature – outdoor temperature≧it is Ultra high speed when it is RTOSTA
Preheating released
Preheating released
Control by heat exchanger temperature Control by heat exchanger temperature
Control by heat exchanger temperature
Control by heat exchanger temperatureControl by heat exchanger temperature
Preheating period is WMAX
Preheating period is WMAX
WMAX 2
H i
Med
15sec. 15sec. 15sec. 15sec. 15sec.
3min. 3min.
3min.
3min.
Med Med Med Med
(WMAX)
(WMAX 2)
(WSTD)
WMIN
STARCPL
RPMKEP
Control by heat exchanger temperature
Control by heat exchanger temperatureControl by heat exchanger temperature
Thermo judgment
Preheating judgment
Fan speed set to "auto"Fan speed set to "auto"
Stop
OFTMPW
0.66˚C
Stop StopStart Start
18˚C
Ther
Thermomo
OFFOFF
Thermo
OFF
TherThermomo
OFFOFF
Thermo
OFF
Notes:
(1)Hotdashisengagedifthedifferencebetweentheroomtemperatureandsettemperatureisequaltothatbetweentheroomtemperature,atwhichthecompressorreachesmaximumspeed,andsettemperature(∆TWMAX),andtheroomand
outdoortemperaturesarelessthan10℃;whenthefanspeedis"auto",operationisstartedat"Hi",orthefanspeedischangedto"Hi"duringheating.
(2)Themaximumcompressorspeedperiodduringhotdashisfinished①whentheroomtemperaturereachestheheatingsettemperature(includingheatingshift)plusSFTDSWor②whenthethermoisoff.
(3)ThethermoOFFtemperatureduringhotdashisheatingsettemperature(includingheatingshift)plus3℃.AfterthermoOFF,hotdashfinishes,andfuzzycontrolstarts.
(5)Thetimelimitforwhichthemaximumcompressorspeed(WMAX)or(WMAX2)duringnormalheating(exceptforhotdash)canbemaintainedislessthan120minuteswhentheroomtemperatureis18℃ormore;itisnotprovidedwhentheroom
temperatureislessthan18℃andoutdoortemperatureislessthan2℃.
(6)Theoperationindicatorblinkseverysecondduringinitialcycleoperation,preheating,defrosting(includingbalancetimeafterdefrostingisfinished),orautofreshdefrosting.
(7)Forpreheatingjudgment,preheatingstartsiftheheatexchangetemperatureislowerthanYNEOFCandiscancellediftheheatexchangetemperatureisYNEOFplus0.33℃orhigheratthestartofoperationusingtheSTART/STOPbutton.
(8)Duringtheoperationatthefanspeedof"Lo"or"Silent",thecompressorspeedissettoWBEMAXorbelow.ItisrestrictedtoWJKMAXorbelowwhenthefanspeedis"Med".
(9)Iftheoutdoortemperature(datafromoutdoorunit)is6℃ormore,themaximumcompressorspeedisWSTD.
(10) Iftheroomtemperaturefallstolessthan18℃inthe"Ultra-Lo"mode,theindoorfanstops.Whentheroomtemperatureis18℃+0.33℃ormore,theultra-Looperationrestarts.However,theultra-Looperationduringpreheatingorpreheatingafter
defrostingdoesnotstopiftheroomtemperatureislessthan18℃.
(11) WMAX2isusedasthemaximumcompressorspeedduringhotdash,whentheoutdoortemperatureislessthan-5℃.
(12) WiththermoOFForinapproximately1minuteafteroperationisstoppedusingtheremotecontroller,thefanoperatesinthe"Ultra-Lo"mode.
Thisoperationisfordischargingheatfromtheindoorunit.
Fan speed set to "auto"
Dash period
Control by heat exchanger temperatureControl by heat exchanger temperatureControl by heat exchanger temperature