Mitsubishi FDUA125VNPWVH - Page 16

'22 • PAC-SM-412
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(11) Drain pump control
(a)  This controlis operatedwhen the inverter frequency is other than0 rpsduring the cooling operation and automatic
coolinganddehumidifyingoperations.
(b)  Drain pump ON condition continues for 5 minutes even when it entersthe OFF range accordingto (a) above after
turningthedrainpumpON,andthenstops.The5-minutedelaycontinuesalsointheeventofanomalousstop.
(c)
Thedrainpumpisoperatedwiththe5-minutedelayoperationwhenthecompressorischangedfromONtoOFF.
(d)Eveninconditionsotherthantheabove(suchasheating,fan,stop,coolingthermostatOFF),thedrainpumpcontrolis
performed by the drain detection.
(e)Followingsettingscanbemadeusingtheindoorfunctionsettingofthewiredremotecontrol.
(i)
(ii)
(iii)
(iv)
Note (1) Values in
〔 〕
arefortheRC-EX3Amodel.
ࠝStandardin coolingࠞ: Drain pump is run during cooling.
ࠝOperate in standard & heatingࠞ: Drain pump is run during cooling and heating.
ࠝOperate in heating & fanࠞ: Drain pump is run during cooling, heating and fan.
ࠝOperate in standard & fanࠞ: Drain pump is run during cooling and fan.
(12) Drain pump motor (DM) control
(a) DraindetectionswitchisturnedONorOFFwiththeoatswitch(FS)andthetimer.
[
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1]Draindetectionswitchisturned“ON”whentheoatswitch“Open”isdetectedfor3secondscontinuouslyin
the drain detectable space.
[
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2]Draindetectionswitchisturned“OFF”whentheoatswitch“Close”isdetectedfor10secondscontinuously.
(i)Itdetectsalwaysfrom30secondsafterturningthepowerON.
1)Thereisnodetectionofanomalousdrainingfor10secondsafterturningthedrainpumpOFF.
2)Turningthedraindetectionswitch“ON”causestoturnONthedrainpumpforcibly.
3)Turningthedraindetectionswitch“OFF”releasestheforceddrainpumpONcondition.
Normal state
[*1] [*2]
Normal state
Drain detection switch ON
Stop
(1)
Indoor unit operation mode
Control A
Control B
Compressor ON
Compressor OFF
Cooling Dry HeatingFan
(2)
Notes (1) Including the stop from the cooling, dehumidifying, fan
and heating, and the anomalous stop
(2) Including the “Fan” operation according to the
mismatch of operation modes
(i)ControlA
1)Iftheoatswitchdetectsanyanomalousdrainingcondition,theunitstopswiththeanomalousstop(displaysE9)
andthedrainpumpstarts.Afterdetectingtheanomalouscondition,thedrainpumpmotorcontinuestobeON.
2)Itkeepsoperatingwhiletheoatswitchisdetectingtheanomalouscondition.
(ii) Control B
Iftheoatswitchdetectsanyanomalousdraincondition,thedrainpumpmotoristurnedONfor5minutes,andat10
secondsafterthedrainpumpmotorOFFitcheckstheoatswitch.Ifitisnormal,theunitisstoppedunderthenormal
modeor, if thereis anyanomalouscondition, E9 is displayed andthedrain pump motor isturnedON. (The ON
conditionismaintainedduringthedraindetection.)
(b) IndoorunitperformsthecontrolAorBdependingoneachoperatingcondition.
(13) Operation check/drain pump test run operation mode
(a)
If the power is turned on by the DIP switch(SW7-1) on the indoor unit control PCB when electric power source is
supplied,it entersthemodeof operationcheck/drainpumptest run. Itisineective(prohibited) tochangetheswitch
afterturningpoweron.
(b)Whenthecommunicationwiththeremotecontrolhasbeenestablishedwithin60secondsafterturningpoweronbythe
DIPswitch(SW7-1)ON,itenterstheoperationcheckmode.Unlesstheremotecontrolcommunicationisestablished,
it enters the drain pump test run mode.
Note (1) To select the drain pump test run mode, disconnect the remote control connector (CnB) on the indoor unit PCB to shut down the remote control
communication.