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Daitsu FMCD*ECM series
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Page 25 of 62
SK2014‐SON‐002‐TechMnl‐FMCD‐003
WithElectricalHeaterasPrimaryHeatSource
a) MTV1,MTV2,andAUX2arealwaysoff.
b) IfTi2≤30ºC(orTi2isdamagedornotconnected),
1) If Tr≤Ts﹣1ºC(or–4ºCifeconomycontactisactivated),thenheatoperationisactivatedand
theelectricalheaterandAUX1areturnedon.Indoorfanrunsat
setspeed.
2) If Tr>Ts,thenheatoperationisterminatedandtheelectricalheaterandAUX1areturnedoff.
Indoorfanrunsat200RPM.
a) IfTi2>30ºC,MTV2andAUX2areoff.
1) If Tr≤Ts﹣1ºC(or–4ºCifeconomycontactisactivated),then
heatoperationisactivatedand
theelectricalheateristurnedoff whileMTV1andAUX1areturnedon.Indoorfanrunsatset
speed.
2) If Tr > Ts, then heat operation is terminated and MTV1 and AUX1 are turned off. Indoor fan
runsat200RPM.
d) TherangeofTs
is16‐30ºC.
e) Indoorfanspeedcanbeadjustedtolow,medium,highandauto.
PRE‐HEAT
WithoutElectricalHeater
a) IfTi1<36ºC[or<28ºCisselectedbyDIPB‐S2positionSW4],thenMTV1andAUX1areturned
on,indoorfanrunsat200rpm.
b) IfTi1≥38ºC[or≥30ºCisselectedbyDIPB‐S2positionSW4],thenMTV1and
AUX1areturned
on,indoorfanrunsatsetspeed.
c) Iftheindoorcoiltemperaturesensorisdamaged,thenthepre‐heattimeissetfor2minutes.
Indoorfanrunsatsetspeed.
WithElectricalHeater
a) Iftheindoorfanspeed≥300rpm,thentheelectricalheater
willturnon.
POST‐HEAT
WithoutElectricalHeater
a) IfTi1≥38ºC,thenMTV1andAUX1areoff,thenindoorfancontinuestorunatsetspeed.
b) If36ºC≤Ti1≤38ºC,thenMTV1andAUX1areturnedoff.Thenindoorfanmaintainsitsoriginalstate.
c) If
Ti1<36ºC,thenMTV1andAUX1areturnedoff.Thenindoorfanrunsat200rpm.
d) Iftheindoorcoiltemperaturesensorisdamaged,thenthepost‐heattimeissetfor3minutes.Indoor
fanrunsatsetspeed.
WithElectricalHeater
a) Indoorfanwillrun
at200rpmbeforetheunitturnsofffor20seconds.
OVER‐HEATPROTECTIONOFINDOORCOIL
a) IfTi1≥75ºC,thenMTV1andAUX1areturnedoff.Indoorfanremainsonandrunsathigh
speed.
b) IfTi1<70ºC,thenMTV1andAUX1areturnedon.Indoorfan
remainsonandrunsatsetspeed.
c) Iftheindoorcoiltemperaturesensorisdamaged,thentheprotectionmodewillbeoverridden
andtheunitwillworkaccordingtothepre‐heatandpost‐heatprogram.

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