Midea M-Thermal Series - Page 63

M‐ThermalSplit  
62 201909
MideaM‐ThermalSplitServiceManual
4.15 P1Troubleshooting
Digitaldisplayoutput
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Description
 Dischargepipehighpressureprotection.Whenthedischargepressurerisesabove4.2MPa,thesystemdisplaysP1
protectionandM‐ThermalSplitstopsrunning.Whenthedischargepressurefallsbelow3.2MPa,P1isremovedand
normaloperationresumes. 
 ErrorcodeisdisplayedonoutdoorunitmainPCBanduserinterface.
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Possiblecauses
 Pressuresensor/switchnotconnectedproperlyorhasmalfunctioned.
 Excessrefrigerant.
 Systemcontainsairornitrogen.
 Highpressuresideblockage.
 Poorcondenserheatexchange.
 OutdoorunitmainPCBdamaged.
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