Midea M-Thermal Series - Page 67

M‐ThermalSplit  
66 201909
MideaM‐ThermalSplitServiceManual
4.17 P4Troubleshooting
Digitaldisplayoutput
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Description
 Dischargetemperatureprotection.
 When the compressor the discharge temperature rises above 115°C, the system displays P4 protection and
M‐Thermal Split stops running. When the discharge temperature fallsbelow90°C,P4isremovedandnormal
operationresumes.
 ErrorcodeisdisplayedonrefrigerantsystemmainPCBanduserinterface.
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Possiblecauses
 Temperaturesensorerror
 Highpressuresideblockage.
 Poorcondenserheatexchange.
 OutdoorunitmainPCBdamaged.
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