Midea M-Thermal Series - Page 77

M‐ThermalSplit  
76 201909
MideaM‐ThermalSplitServiceManual
Situation 2: L1 or L2 error appears after the compressor has been running for a period of time and the compressor
speedisover20rps
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L1/L2 
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RelayonoutdoorunitmainPCBisopen
Yes
ReplacetheoutdoorunitmainPCB
No
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Replacetheinvertermodule
2
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Notes: 
1. IfthefanmotorisrunningandtheDCvoltagebetweenterminalsPandNoninvertermoduledeclined,Relayonthemaincontrolboardofoutdoor
unitisopen.
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2. Whenreplacinganinvertermodule,alayerofthermallyconductivesilicagelshouldbepaintedonIPMmodule(onthereversesideoftheinvertermodule
PCB).RefertoFigure4‐4.1.
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relay
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