Mitsubishi PUZ-A18NHA6 - Page 41

41
<M-NET communication error>
Note:“Indoorunit”inthetextindicatesM-NETboardinoutdoorunit.
Check code
Abnormal point and detection method
Case
Judgment and action
1–4 Checkpipe<liquidorcondenser/
 evaporator>temperaturewithroom
 temperaturedisplayonremote
  controllerandoutdoorcontrollercircuit
 board.
  Pipe<liquidorcondenser/evaporator>
 temperaturedisplayisindicatedby
  settingSW2ofoutdoorcontrollercircuit
 boardasfollows.
23Checkconverseconnectionofextension
pipeorconversewiringofindoor/outdoor
unitconnectingwire.
Conducttemperaturecheckwithoutdoor
controllercircuitboardafterconnecting
‘A-ControlServiceTool(PAC-SK52ST)’.
(
)
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
ON
OFF
1 2
3
4 5 6
ON
OFF
1 2 3 4 5 6
ON
OFF
A-Control Service Tool SW2 setting
Temperature display of indoor liquid pipe
Indoor 1
Temperature display of indoor liquid pipe
Indoor 2
Temperature display of indoor condenser/
evaporator pipe Indoor 1
Temperature display of indoor condenser/
evaporator pipe Indoor 2
P8
1Slighttemperaturedifference
betweenindoorroom
temperatureandpipe<liquid
orcondenser/evaporator>
temperaturethermistor
•Shortageofrefrigerant
•Disconnectedholderof
pipe<liquidorcondenser/
evaporator>thermistor
•Defectiverefrigerantcircuit
2Converseconnectionof
extensionpipe(onpluralunits
connection)
3Conversewiringofindoor/
outdoorunitconnectingwire(on
pluralunitsconnection)
4Defectivedetectionofindoor
roomtemperatureandpipe
<condenser/evaporator>
temperaturethermistor
5Stopvalveisnotopened
completely.
Pipe temperature
<Coolingmode>
Detectedasabnormalwhenthepipetem-
peratureisnotinthecoolingrange3min-
utesaftercompressorstartand6minutes
aftertheliquidorcondenser/evaporatorpipe
isoutofcoolingrange.
Note1:
Ittakesatleast9minutestodetect.
Note2:AbnormalityP8isnotdetectedin
dryingmode.
Coolingrange:Indoorpipetemperature
(TH2orTH5)−intaketemperature
(TH1)[−5.4˚F[−3:]
TH:Lowertemperaturebetweenliquidpipe
temperatureandcondenser/evaporator
temperature
<Heatingmode>
When10secondshavepassedafterthe
compressorstartsoperationandthehot
adjustmentmodehasfinished,theunitis
detectedasabnormalwhencondenser/
evaporatorpipetemperatureisnotinheat-
ingrangewithin20minutes.
Note3:Ittakesatleast27minutesto
detectabnormality.
Note4:Itexcludestheperiodofdefrosting
(Detectionrestartswhendefrosting
modeisover)
Heatingrange: 5.4˚F[3:] [(Condenser/
evaporatortemperature(TH5)−
intaketemperature(TH1))
Check Code Abnormal point and detection method Case Judgment and action
A0
(6600)
Address duplicate definition
Thiserrorisdisplayedwhentransmission
fromtheunitsofsameaddressisdetected.
Note:Theaddressandattributedisplayed
atremotecontrollerindicatethe
controllerthatdetectedabnormality.
1Thereare2ormoresame
addressofcontrollerofout-
doorunit,indoorunit,FRESH
MASTER,orLOSSNAY.
2Noisehasenteredintotrans-
missionsignalandsignalwas
transformed.
Searchtheunitwithsameaddressasabnormali-
tyoccurred.Ifthesameaddressisfound,turnoff
thepowersupplyofoutdoorunitandindoorunit
andFRESHMASTERorLOSSNAYatthesame
timefor2minutesormoreaftertheaddressis
corrected,andturnthepoweronagain.
Checktransmissionwaveformornoiseon
transmissionwire.
A2
(6602)
Hardware error of transmission processor
Transmissionprocessorintended
totransmit“0”,but“1”appearedon
transmissionwire.
Note:Theaddressandattributedisplay
atremotecontrollerindicatethe
controllerthatdetectedabnormality.
1
Errorisdetectedifwaveformis
transformedwhenwiringworksof
transmissionwireofoutdoorunit,
indoorunit,FRESHMASTERor
LOSSNAYaredone,orpolarityis
changedwiththepoweronand
transmissiondatacollideeachother.
2Defectivetransmittingreceiving
circuitoftransmissionprocessor
3Transmissiondataischangedby
thenoiseontransmission.
1Iftheworksoftransmissionwireisdone
withthepoweron,turnoffthepowersupply
ofoutdoorunitandindoorunitandFRESH
MASTERorLOSSNAYatthesametimefor
2minutesormore,andturnthepoweron
again.
2Checktransmissionwaveformornoiseon
transmissionwire.
A3
(6603)
BUS BUSY
1.Overtimeerrorbycollisiondamage
 Abnormaliftransmittingsignalisnot
possiblefor8–10minutescontinuously
becauseofcollisionoftransmission.
2.Datacouldnotreachtransmissionwire
for8–10minutescontinuouslybecause
ofnoise,etc.
Note:Theaddressandattributedisplayed
atremotecontrollerindicatethecon-
trollerthatdetectedabnormality.
1
Transmissionprocessorcould
nottransmitsignalbecauseshort
cyclevoltageofnoiseandthe
likehaveenteredintotransmis-
sionwirecontinuously.
2Transmissionquantityhas
increasedandtransmissionis
notpossiblebecausetherewas
wiringmistakeofterminalblock
fortransmissionwire(TB3)and
terminalblockforcentralcontrol
(TB7)inoutdoorunit.
3Transmissionaremixedwith
othersandoccupationrateon
transmissionwirerosebecause
ofdefectiverepeater(afunction
toconnectorordisconnecttrans-
missionofcontrolandcentral
controlsystem)ofoutdoorunit,
thenabnormalityisdetected.
1Checkiftransmissionwireofindoorunit,
FRESHMASTER,LOSSNAY,orremotecon-
trollerisnotconnectedtoterminalblockfor
centralcontrol(TB7)ofoutdoorunit.
2Checkiftransmissionwireofindoorunit,
FRESHMASTERorLOSSNAYisnotcon-
nectedtoterminalblockfortransmissionwire
ofoutdoorunit.
3Checkifterminalblockfortransmissionwire
(TB3)andterminalblockforcentralcontrol
(TB7)arenotconnected.
4Checktransmissionwaveformornoiseon
transmissionwire.
OCH577A