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SK2014‐SON‐002‐TechMnl‐FMCD‐003
DEHUMIDIFICATIONMODE
a) MTV2,AUX1andheaterarealwaysoff.
b) IfTr≥25ºC,thenMTV1andAUX2willbeONfor3minutes,andthenOFFfor4minutes.
c) If16ºC≤Tr<25ºC,thenMTV1andAUX2willbeONfor3minutes,andthenOFFfor
6minutes.
d) IfTr<16ºC,thenMTV1andAUX2willbeturnedofffor4minutes.
e) At the end of the above dehumidification cycle, the system will decide the next dehumidification
controloption.Indoorfanwillrunatlowspeedthroughoutthedehumidificationprocess.
AUTOMODE
WithoutElectric
heaterandWithElectricHeaterasBooster
a) Everytimetheunitisturnedon,MTV1isonwhileAUX1,AUX2andfanareoff.MTV2
and the heater are always off. After 120 seconds, the subsequent operation mode is
decidedaccordingtothefollowing:
1) If the coiltemperature
sensor(Ti1)≥36°C,thenMTV1, AUX1and fanturnonor
offaccordingtoHEATmode.
2) IfTi1<36°C,thenMTV1,AUX2andfanturnonoroffaccordingtoCOOLmode.
b) Unit remains in AUTO COOL or AUTO HEAT mode throughout the operating cycle until
the
userchangesthemodemanuallyorrestartstheunit.
c) ShouldtheTi1sensorfailorbedamaged,automodewillnotfunction.
WithElectricHeaterasPrimaryHeatSource
a) IfthecurrentrunningmodeisAUTOCOOLmode,itwillchangeovertoAUTOHEATmode
uponsatisfying
alltheconditionsbelow:
1) Ts‐Tr≥1°C(or–4ºCifeconomycontactisactivated).
2) MTV1hasstopped≥10minutes.
b) IfthecurrentrunningmodeisAUTOHEATmode,itwillchangeovertoAUTOCOOLmode
uponsatisfyingalltheconditionsbelow:
1) Tr‐Ts≥1°C(or
+4ºCifeconomycontactisactivated).
2) MTV1hasstopped≥10minutes.
Note: AUTO COOL or AUTO HEAT operations are the same as COOL or HEAT mode
respectively.
C.1.5.2. WithoutThermoelectricValveConfiguration
COOLMODE
a) Heater,AUX1,MTV1andMTV2arealwaysoff.
b) IfTr≥Ts+1ºC(or+4ºCifeconomycontactisactivated),thencooloperationisactivatedandAUX2
isturnedon.Indoorfanrunsatsetspeed.
c) IfTr<
Ts,thencooloperationisterminatedandAUX2isoff.Indoorfanisturnedoff.
d) TherangeofTsis16‐30ºC.
e) Indoorfanspeedcanbeadjustedtolow,medium,highandauto.
f) Whentheunitisturnedoff,indoorfanshutdownafter5seconds.
LOWTEMPERATUREPROTECTIONOFINDOORCOIL
a) IfTi1≤2ºCfor2minutes,thenAUX2isturnedoff.If lowspeedisselectedviauserinterface,thenindoor
fanrunsatmediumspeed.Ifmediumorhighspeedisselectedviauserinterface,thenindoorfanrunsat
setspeed.
b) IfTi1≥5ºCfor2minutes,thenAUX2isturnedon.Indoorfanrunsatsetspeed.
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