Midea M-Thermal Series - Page 79

M‐ThermalSplit  
78 201909
MideaM‐ThermalSplitServiceManual
4.21 PdTroubleshooting
Digitaldisplayoutput
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Description
 Hightemperatureprotectionofairsideheatexchangerrefrigerantoutletincoolingmode.Whentheairsideheat
exchanger refrigerant outlet temperature is higher than 62°C for more than 3 seconds, the system displays Pd
protection and M‐Thermal Split stops running. When the air side heat exchanger refrigerant outlet temperature
returnsdropsbelow52°C,Pdisremovedandnormaloperationresumes.
 M‐ThermalSplitstopsrunning.
 ErrorcodeisdisplayedonoutdoorunitmainPCBanduserinterface.
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Possiblecauses
 Temperaturesensornotconnectedproperlyorhasmalfunctioned.
 Poorcondenserheatexchange.
 Fanmotordamaged.
 HydronicboxmainPCBdamaged.
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