Hitachi RAS-4-HNC - Introduction

10. Servicing
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SMGB0079 rev.0 - 01/2013
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10.1 Introduction
D A N G E R
• Beforeperforminganyoftheserviceoperationsdescribedinthischapterturnallthemainswitchesoffandthe
placesecuritylockersorconvenientwarningindicatorsinordertopreventthemfromturningonaccidentally.
• Incaseofblockedorstuckedpartsuseappropiatedtoolsandeventuallylubricantstoreleasethem.
• Incaseofsharpededgedpartsascoversusesecurityglovestoavoidgettinginjured.
• Whenperformingbrazingworkbesidessecurityglovesitismusttowearconvenienteyeprotection.
• CheckandbesurethattheLED201(Red)ontheinverterPCBisOFFforallelectricalmaintenance.
• DoNOTtouchtheelectricalcomponentswhentheLED201(Red)ontheinverterPCBisONtoavoidelectrical
shock.
N O T E
• Allcompressorsareconnectedbybrazing.Checktoensurewhetherthereareammablethingsaroundornot
whenusingaburnerforpipeconnectionsifnotoilexistingpipeinsidemayignite.
• Donotexposetherefrigerantcycletotheatmosphereforalongperiodinordertoavoidmixingthewaterand
foreignparticlesintotherefrigerantcycle.Afterremovingcompressorreplaceitquickly.Ifexposedforalong
periodsealthesuctionpipeanddischargepipe.
• Removethecapforthecompressorjustbeforereplacingthecompressor.Beforemountingthecompressor
sealthesuctionpipeanddischargepipewithatapetoprotectthecompressorfromforeignparticles.Remove
thetapeatpipeconnection.