Mitsubishi PUY-A12NHA6 - Specific Error Code Troubleshooting

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10-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Note:RefertoindoorunitsectionforcodePandcodeE.
Check code
Abnormal point and detection method
Case
Judgment and action
None
—
1Novoltageissuppliedtoterminal
block(TB1)ofoutdoorunit.
a)Powersupplybreakeris
turnedoff.
b)Contactfailureordisconnec-
tionofpowersupplyterminal
c)
Openphase(L1orL2phase)
2Electricpowerisnotchargedto
powersupplyterminalofout-
doorpowercircuitboard.
a)Contactfailureofpower
supplyterminal
b)Openphaseontheoutdoor
powercircuitboard
A12–A24N:
Disconnectionof
connectorRorS
A30–A42N:Disconnectionof
connectorTABT
orTABS
3Electricpowerisnotsuppliedto
outdoorcontrollercircuitboard.
a)Disconnectionofconnector
(CNDC)
4Disconnectionofreactor(DCL
orACL)
5Disconnectionofoutdoornoise
filtercircuitboardorpartsfail-
ureinoutdoornoisefiltercircuit
board
 AsforA30–A42Ntype,itis
especiallyneededtocheckthe
resistanceRS1onthenoisefil-
tercircuitboard.
6Defectiveoutdoorpowercircuit
board
7Defectiveoutdoorcontroller
circuitboard
1Checkfollowingitems.
a)Powersupplybreaker
b)Connectionofpowersupplyterminalblock
(TB1)
c)Connectionofpowersupplyterminalblock
(TB1)
2Checkfollowingitems.
a)Connectionofpowersupplyterminalblock
(TB1)
b)Connectionofterminalonoutdoorpower
circuitboard
A12–A24N:DisconnectionofconnectorRorS
Referto"10-9.TESTPOINT
DIAGRAM".
A30–A42N:DisconnectionofconnectorTABT
  orTABS
Referto"10-9.TESTPOINT
DIAGRAM".
3 Check connectionoftheconnector(CNDC)
ontheoutdoorcontrollercircuitboard.
Check connectionoftheconnector,LD1and
LD2forA12–A24NandCNDCforA30–A36N,
ontheoutdoorpowercircuitboard.
Referto"10-9.TESTPOINTDIAGRAM".
4 Check connectionofreactor.(DCLorACL)
A12–A24N:Checkconnectionof“LO”and
“NO”ontheoutdoornoisefiltercircuitboard.
Checkconnectionof“R”and“S”onthe
outdoorpowercircuitboard.
A30–A42N:Checkconnectionof“L1”and“L2”
ontheactivefiltermodule.(ACTM)
Referto"10-9.TESTPOINTDIAGRAM".
5a) Checkconnectionofoutdoornoisefilter
circuitboard.
b) Replaceoutdoornoisefiltercircuitboard.
Referto"10-9.TESTPOINTDIAGRAM".
6Replaceoutdoorpowercircuitboard.
7Replacecontrollerboard(Whenitemsabove
arecheckedbuttheunitscannotberepaired).
OCH577A