Hitachi RAS-3-HVNC - Removing Other Electrical Components

10. Servicing
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SMGB0079 rev.0 - 01/2013
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10.4.3.14 Removing other electrical components
1 Remove the service cover following Removing service cover in this chapter.
2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate).
• Check that the LED201 (red) on Inverter is OFF when the P plate is opened.
D A N G E R
DONOTtouchelectricalcomponentswhiletheLED201(Red)isONtoavoidelectricalshock.Waituntilthe
LEDturnsoff.
Capacitors
1 Remove all the wiring connected to the capacitors.
N O T E
The wires have polar characters. Identify the wire mark
bandandtheindicationonthecapacitorwhenconnecting
wires.
2 Remove 2 screws xing the capacitors.
CMC
1 Remove all the wiring connected to CMC.
2 Remove 3 screws xing the CMC.
Reactor
1 Remove 4 screws xing the reactor.
Noise lter
1 Remove all the wiring connected to the noise lter.
2 Hold the upper part of the 6 holders with the long nose pliers
and remove the noise lter.
Holder
Long-Nose Pliers
Noise Filter
Holder
Noise lter
Long nose pliers
Capacitor
Noise lter
CMC
Reactor
Fuse
Inverter PCB
Diode module
N O T E
• Toconnectwiringatreassembling,ensurethattheterminalnumbersandwiringmarkbandcodesaremat-
ched.Ifconnectionsarewrong,thereisthepossibilityofwrongoperationandtocausedamagetoelectrical
parts.
• FromthePowerWires(UPhase,VPhase,WPhase)ofInverterCompressor(MC1),pleasemakesurethatthe
2wiresofUPhaseandVPhasepassthroughthecurrentsensors(CTU•CTV)ofInverterPCB(PWB3).Also
makesurethatthePowerWireofUPhaseisconnectedtotheUPhasesideofcurrentsensor(CTU),andthat
VPhaseisconnectedtotheVPhasesideofcurrentsensor(CTV).Ifthecombinationiswrong,itcouldbea
causeofwrongoperationanddamage.
• henattachingthePCB,orwhenattachingthepartsattachedtothePCB,payattentionnottoclampanywiring
betweenplatesorelectricalcomponents.
• Screws,BushesandCollarsareusedtoxtheInverterPCB.PleaseuseBushesandCollarswithoutfaultwhen
attachingtheInverterPCB.Failuretodosomaycausewrongoperation.
• WhenreplacingtheControlPCB,pleasesettheDipSwitcheswiththesamecongurationasthePCBbefore
replacement.Wrongsettingsmaycausewrongoperation.Also,pleaseconrmthereplacementinstructions
suppliedwiththePCBsoldasaservicepart.
• DonotapplytoomuchforcetotheelectricalpartsmountedonthePCBortothePCBitself.Itmaycausefailure
ofthePCB.