Mitsubishi Electric CITY MULTI PUMY-SP140YKM User Manual

Check code
5110
(U4)
Heatsinktemperaturethermistor(TH8)open/short
Abnormal points and detection methods Causes and checkpoints
AbnormalifTH8(Internalthermistor)detectstobeopen/short.
Open:−34.8 [−30.6°F]orless
Short: 102 [215.6°F]ormore
TH8: Thermistor <Heat sink>
Disconnection or contact failure of connectors
Characteristic defect of thermistor
Defective outdoor multi controller circuit board
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnecting
anyconnectors,orreplacingboards.
Diagnosis Remedy
outdoor
Theblacksquare(■)indicatesaswitchposition.
SW1Setting
ON
OFF
DisplayonLED1,2
Unit
−99.9–999.9
:
41 2 5 6 7 83
No
Yes
Yes
Yes
No
No
Yes
No
Is there any abnormality such
as a disconnection, looseness or
breakage?
Is the detected resistance normal?
Isthedetectedtemperaturenormal?
Connectthewiring/connectorproperly.
Replaceitincaseofabreakage.
Replacethethermistor.
Replacetheoutdoormulticontrollercircuit
board (Malfunction of thermistor circuit).
No abnormality
(Aconnectorcontactfailureissuspected.)
CheckthewiringandconnectorconnectionofTH8.
Disconnect the connector to check the
resistance of TH8 using a tester.
CheckatemperatureofTH8.
Thedetectedtemperatureofthermistor(TH8)
canbedisplayedbyanoperationofSW1onthe
outdoor multi controller circuit board.
ThedetectedtemperatureofTH8canbedisplayedbyan
operationofSW1ontheoutdoormulticontrollercircuitboard.
Isitamodelwithinternal
thermistor?
78
79
OCH668B

Mitsubishi Electric CITY MULTI PUMY-SP140YKM Specifications

General

Brand	Mitsubishi Electric
Model	CITY MULTI PUMY-SP140YKM
Category	Air Conditioner
Language	English