Midea M-Thermal Series - Page 56

  M‐ThermalSplit 
20190955
4.10 H1Troubleshooting
Digitaldisplayoutput


Description
 Communicationerrorbetweenoutdoorunitmaincontrolboardandinvertermodule.
 M‐ThermalSplitstopsrunning.
 ErrorcodeisdisplayedonoutdoorunitmainPCBanduserinterface.

Possiblecauses
 Powersupplyabnormal.
 Interferencefromasourceofelectromagneticradiation.
 OutdoorunitmainPCBorinverterdrivenmoduledamaged.
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Procedure

H1 


LEDonthemaincontrolboardof
outdoorunitandinvertermoduleare
light

Yes
LEDisnotlight,theboardis
damaged,orhaveshortcircuit

No

Communicatinwiresbetweenthemain
controlboardofoutdoorunitand
invertermoduleisloose

Yes
Reconnectthecommunicatinwires
No

Thereisasourceofelectromagnetic
radiationneartheunit,suchas
high‐frequencytransmitterorotherhigh
strengthradiationdevice
Yes
Removethesourceofinterference
No

ReplaceoutdoorunitmainPCBand
inverterdrivenmoduleinturn



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