Mitsubishi Electric CITY MULTI PUMY-SP140YKM User Manual

Check code
Abnormal points and detection methods Causes and checkpoints
AbnormalifTH3detectstobeopen/short.
(Theopen/shortdetectionisdisabledduring10secondsto10minutes
aftercompressorstarts,duringdefrostingoperation,orfor10minutesafter
returningfromthedefrostingoperation.)
Open:−40 [−40°F]orless
Short:90 [162°F]ormoreTH3: Thermistor<Outdoorliquidpipe>
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
5105
(U4)
Outdoorliquidpipetemperaturethermistor(TH3)open/short
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
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TH3.
Disconnect the connector to check the
resistance of TH3 using a tester.
CheckatemperatureofTH3.
ThedetectedtemperatureofTH3canbedisplayedbyan
operationofSW1ontheoutdoormulticontrollercircuitboard
75
OCH668B

Mitsubishi Electric CITY MULTI PUMY-SP140YKM Specifications

General

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