Midea ATOM B Series - 6 Special Control

AtomBSeriesVRF50/60Hz   
20  
MideaAtomBSeriesServiceManual
5.4 CompressorandInverterModuleProtectionControl
Thiscontrolprotectsthecompressorsfromabnormallyhighcurrentsandprotectstheinvertermodulesfromabnormally
hightemperatures. 
Figure3‐5.4:Compressorcurrentprotectioncontrol 
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5.5 DisableCoolingControl
Whentheoutdoorambienttemperaturedropsbeloworequalto-15°C， cooling mode is disabled to prevent low
compressionratioswhichcanresultininsufficientcompressorinternaloillubrication,andpreventhumidcompressedinlow
superheatofcompressorbottomconditions.Whentheoutdoorambienttemperaturerisesaboveorequalto-14°C,the
compressorentersre-startcontrol. 
Figure3‐5.6:Disableheatingcontrol 
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Current≥Current
max
Current<Current
max
Normaloperation
Compressorcurrentprotection,errorcodeP3isdisplayed
Outdoorambienttemperature≤-15
o
C
Outdoorambienttemperature≥-14
o
C
Coolingoperation
Unitsstop