Mitsubishi Electric CITY MULTI PUMY-SP140YKM User Manual

Check code
Abnormal points and detection methods Causes and checkpoints
AbnormalifovercurrentofDCbusorcompressorisdetectedbefore30
secondsafterthecompressorstartsoperating.
Closedstopvalve
Decreaseofpowersupplyvoltage
Looseness,disconnection,orwrongphaseof
compressorwiringconnection
Model selection error on indoor controller board or
outdoor multi controller circuit board
Defectivecompressor
Defectiveoutdoorpowercircuitboard
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnectinganyconnectors,orreplacingboards.
Diagnosis Remedy
4100
(UF)
Compressorcurrentinterruption(Lockedcompressor)
Chart 1 of 2
Yes
Yes
Yes
No
No
No
Isthestopvalve(liquid/gas)fully
open?
Isthepowersupplyvoltagenormal?
Aretheysetproperly?
Openthestopvalve(liquid/gas)fully.
• Checkthelooseness,disconnection,or
breakageofcompressorwiring.
• Ensurepowersupplyfromthefacility.
(Checkforpowersupplyopenphase.)
Setthemodelselectionswitchcorrectly,
then restart.
Checkthestopvalve.
Checkthepowersupplyvoltage.
Checkifthemodelselectionswitchisset
correctly on the indoor controller board or
outdoor multi controller circuit board.
TurnthepowerOFFtocheckfor
looseness,disconnection,orwrongphase
ofcompressorwiringconnection.
Continuetothenextpage
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OCH668B

Mitsubishi Electric CITY MULTI PUMY-SP140YKM Specifications

General

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