Mitsubishi PUZ-A18NHA6 - Troubleshooting Specific Problems

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10-5. TROUBLESHOOTING OF PROBLEMS
Phenomena
Factor Countermeasure
1.Remotecontrollerdisplaydoesnot
work.
2.“PLEASEWAIT”displayisremained
ontheremotecontroller.
3.Whenpressingtheremotecontroller
operationswitchtheOPERATION
displayisappearedbutitwillbe
turnedoffsoon.
1Aftercancellingtoselectfunctionfromtheremote
controller,theremotecontrolleroperationswitchwill
notbeacceptedforapprox.30seconds.
1Normaloperation
1Atlongest2minutesafterthepowersupply“PLEASE
WAIT”isdisplayedtostartup.
2Communicationerrorbetweentheremotecontroller
andindoorunit
3Communicationerrorbetweentheindoorandout-
doorunit
4Outdoorunitprotectiondeviceconnectorisopen.
112VDCisnotsuppliedtoremotecontroller.
(PowersupplydisplayisnotindicatedonLCD.)
212–15VDCissuppliedtoremotecontroller,how-
ever,nodisplayisindicated.
• “PLEASEWAIT”isnotdisplayed.
• “PLEASEWAIT”isdisplayed.
1CheckLED2onindoorcontrollerboard.
(1)WhenLED2islit.
Checktheremotecontrollerwiringfor
breakingorcontactfailure.
(2)WhenLED2isblinking.
Checkshortcircuitofremotecontroller
wiring.
(3)WhenLED2isnotlit.
RefertophenomenaNo.3below.
2Checkthefollowing.
• Failureofremotecontrollerif“PLEASE
WAIT”isnotdisplayed
• RefertophenomenaNo.2belowif
“PLEASEWAIT”isdisplayed.
1Normaloperation
2Self-diagnosisofremotecontroller
3”PLEASEWAIT”isdisplayedfor6
minutesatmostincaseofindoor/outdoor
unitcommunicationerror.CheckLED3on
indoorcontrollerboard.
(1)WhenLED3isnotblinking.
Checkindoor/outdoorconnectingwire
formiswiring.
(ConversewiringofS1andS2,orbreak
ofS3wiring.)
(2)WhenLED3isblinking.
Indoor/outdoorconnectingwireis
normal.
4CheckLEDdisplayonoutdoorcontroller
circuitboard.Referto"10-10.FUNCTION
OFSWITCHES,CONNECTORSAND
JUMPERS".
Checkprotectiondeviceconnector(63L
and63H)forcontactfailure.
Referto"10-9.TESTPOINTDIAGRAM".
Check code Abnormal point and detection method Case Judgment and action
A8
(6608)
M-NET NO RESPONSE
Abnormalifamessagewastransmitted
andtherewerereply(ACK)thatmessage
wasreceived,butresponsecommand
doesnotreturn.Transmittingsidedetects
abnormalityevery30seconds,6times
continuously.
Note:Theaddressandattributedisplayed
atremotecontrollerindicatethecon-
trollerthatdidnotreply(ACK).
1Transmittingconditionis
repeatedfaultbecauseof
noiseandthelike.
2Extensionoftransmissionwire
voltageandsignaliscaused
byover-rangetransmission
wire.
•Maximumdistance······ 656ft
[200m]
•
Remotecontrollerline···· (39ft
[12m])
3Extensionoftransmissionwire
voltageandsignaliscaused
bytype-unmatchedtransmis-
sionwire.
Type······
Withshieldwire-
 CVVS,CPEVS
Withnormalwire(noshield)-
 VCTF,VCTFK,CVV
 CVS,VVR,VVF,VCT
Diameter····1.25mm
2
[AWG16]
ormore
4Accidentalmalfunction
ofabnormality-generated
controller
1Checktransmissionwaveformornoiseon
transmissionwire.
2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.Ifmal-
functionwasaccidental,theunitreturnsto
normal.Ifthesameabnormalitygenerates
again,controllerofdisplayedaddressand
attributemaybedefective.
OCH577A