Midea M-Thermal Series - Page 72

  M‐ThermalSplit 
20190971
4.19 P6Troubleshootingforsingle‐phasemodels
Digitaldisplayoutput
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Description
 Invertermoduleprotection.
 M‐ThermalSplitstopsrunning.
 ErrorcodeP6isdisplayedontheuserinterface.SpecificerrorcodeL0,L1,L2,L4,L5,L7,L8orL9isdisplayedonthe
outdoorunitmainPCB.
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Possiblecauses
 Invertermoduleprotection.
 DCbusloworhighvoltageprotection.
 MCEerror.
 Zerospeedprotection.
 Phasesequenceerror.
 Excessivecompressorfrequencyvariation.
 Actualcompressorfrequencydiffersfromtargetfrequency.
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SpecificerrorcodesforP6invertermoduleprotection
IfaP6errorcodeisdisplayedontheuserinterface,oneofthefollowingspecificerrorcodesisdisplayedontheoutdoor
unitmainPCB:L0,L1,L2,L4,L5,L7,L8,L9.RefertoTable4‐4.1.
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Table4‐4.1:SpecificerrorcodesforerrorP6 
Specificerrorcode Content
L0 Invertermoduleprotection
L1 DCbuslowvoltageprotection
L2 DCbushighvoltageprotection
L4 MCEerror
L5 Zerospeedprotection
L7 Phasesequenceerror
L8 Compressorfrequencyvariationgreaterthan15Hzwithinonesecondprotection
L9 Actualcompressorfrequencydiffersfromtargetfrequencybymorethan15Hzprotection
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ThespecificerrorcodescanalsobeobtainedfromtheLEDindicatorsLED1/LED2ontheinvertermodule.RefertoFigure
4‐4.2andFigure4‐2.4or4‐2.6inPart4,2.1“OutdoorUnitPCBs”. 
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