Hitachi RAS-(3-6)HVNC1(E) - Page 431

10 Servicing
417
SMGB0087 rev.0 - 12/2013
10
10.7.7.2 RAS-(5-6)H(V)NC1E
1 Remove the service cover, upper cover, bottom ser-
vice cover and rear cover following “10.7.1 Remo-
vingservicecover”, “10.7.3Removinguppercover”,
and “10.7.4Removingbottomservicecoverandrear
cover”. When the outdoor unit is installed close to a
wall remove the refrigerant piping and move the unit
from the wall.
2 Remove the electrical box following “10.7.6 Remo-
vingelectricalbox”
3 Collect the refrigerant from the 3 check joints (for the
liquid pipe stop valve, the gas pipe stop valve and
the reversing valve piping).
4 .Remove the valve stay.
N O T E
CheckPerformtherecoveryworkatthecheckjoint
ofpiping.Ifnot,therefrigerantremainsinside.
5 Open the soundproof cover wrapped around the
compressor and remove the terminal box cover of
the compressor body. Disconnect the compressor
wires in the terminal box and disconnect the ther-
mistor on top of the compressor. Remove the soun-
dproof cover.
N O T E
Check the terminal codes and mark bands when
disconnectingthewires.Connectingwiresinwrong
orderatreassemblingmayresultincompressorda-
mage.
6 Remove the rubber cap and the thermistor (THM9)
attached on top of the compressor.
7 Remove the crankcase heater.
Upper Cover
Rear Cover
Check Joint
Valve Stay
Rear Piping Cover
Wire for Compressor
Closing Nut
Soundproof
Cover
Terminal Box Cover
Holder
Thermistor THM9
on Top of Compressor
(for Discharge Gas Temp.)
N O T E
• Compressor pipingmust be connectedby brazing. MAKESURE that anyammable material isnot around before
heatingwithburnerfortheoilinsidethepipingmayameup.
• Donotexposetherefrigerantcycletotheatmosphereforalongperiodtoavoidmoistureordustintothecycle.Besure
toreplacethecompressorimmediatelyafterremoving.Sealthesuctionanddischargepipeswhentherefrigerantcycle
isleftunattachedforalongperiod.
• Removethecapofnewcompressorrightbeforethereplacement.Beforemountingthecompressorsealthesuction
anddischargepipeswithatapetoprotectthecompressorfromdust.Removethetapewhenblazingthepipe.
• Forpipingatreassemblingensurethatthecompressorterminalnumbersandwiringmarkbandcodesarematched.
Incorrectwiringnumbersmayresultininverserotationanddamageofthecompressor.