Midea M-Thermal Series - Page 60

  M‐ThermalSplit 
20190959
4.13 H8Troubleshooting
Digitaldisplayoutput


Description
 Pressuresensorerror.
 M‐ThermalSplitstopsrunning.
 ErrorcodeisdisplayedonoutdoorunitmainPCBanduserinterface.

Possiblecauses
 Pressuresensornotconnectedproperlyorhasmalfunctioned.
 OutdoorunitmainPCBisdamaged.

Procedure

H8 
No

Highpressuresensorconnectionon
outdoorunitmainPCBisloose
Yes
Ensurethesensorisconnectedproperly
No

Highpressuresensorhasshort‐circuited
orfailed
1

Yes
Replacethesensor
No

ReplaceoutdoorunitmainPCB  

Notes: 
1. Measuretheresistanceamongthethreeterminalsofthepressuresensor.IftheresistanceisoftheorderofmegaOhmsorinfinite,thepressuresensor
hasfailed.ThepressuresensorconnectiononeachtypeofoutdoorunitmainPCBislabeledinFigure4‐2.2inPart4,2.3"MainPCBsforRefrigerantSystem,
InverterModule".

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