Hitachi RAS-(2-6)HVNP1(E), Service Manual

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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 flammable material is not around before
heating with burner for the oil inside the piping may flame 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.