Midea M-Thermal Series - Page 50

  M‐ThermalSplit 
20190949
Procedure

E5/E6/E9/EA 


Temperaturesensorconnectionon
outdoorunitmainPCBisloose
1

Yes
Ensurethesensorisconnectedproperly
No

Temperaturesensorhasshort‐circuited
orfailed
2

Yes
Replacethesensor
No

ReplaceoutdoorunitmainPCB  

Notes: 
1. AirsideheatexchangerrefrigerantoutlettemperaturesensorandoutdoorambienttemperaturesensorconnectionsareportCN9ontheoutdoorunit
mainPCB(labeled12inFigure4‐2.2inPart4,2.3"MainPCBsforRefrigerantSystem,InverterModule".Dischargepipetemperaturesensorconnectionis
portCN8ontherefrigerantsystemmainPCBs(labeled11inFigure4‐2.2inPart4,2.3"MainPCBsforRefrigerantSystem,InverterModule").Suctionpipe
temperaturesensorconnectionisportCN1onthemaincontrolboard(labeled13inFigure4‐2.2inPart4,2.3"MainPCBsforRefrigerantSystem,Inverter
Module"). 
2. Measuresensor resistance.If the resistanceis toolow, the sensorhasshort‐circuited.Iftheresistanceisnotconsistentwith thesensor’s resistance
characteristicstable,thesensorhasfailed.RefertoTable4‐5.1,andTable4‐5.2inPart4,5.1“TemperatureSensorResistanceCharacteristics”.


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