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

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10 Servicing
376
SMGB0087 rev.0 - 12/2013
10.4.7 Removing the compressor
1 Remove the service cover, bottom service cover and rear cover
following
“10.4.1 Removing service cover” and “10.4.4 Removing
the 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. Collect the refrigerant from the check joint.
2 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.
to DRM1 and SC terminals.
or transmission wiring
Do not connect power supply
17E26270A
CAUTION
SC AS4755 DRM1
PCN1
TR1
IC1
SEG1
1 6 2 5
ON
3 4 1
ON
2 4 3
1 6 2 5
ON
3 4 1 6 2 5
ON
3 4
ON
2 1
ON
2 1
P
S W 1
P
S W 3
0
9 8
7 6 5 4
3 2
1 SW1
D
S W 3
R195
REG1
E
Y20C Y20A Y
21
Y52C
Y
C H
Y21SW1
Y21SW2-1
Y21SW2-2
LED3
LED2
P
S W 2
D
S W 6
RSW1
DSW1
DSW5
DSW2 DSW4
LED4
LED1
E FS
1
EFR1
EF1
E
F2
E F3
THM9
THM1
0
THM
7
THM8
CN10
0
CN1
CN6
CN7
CN10
1
CN40
4
CN2
CN8 CN5A
CN40
5
C N40
6
CN1
0
PCN9
TP1
S K
1
PCN10 PCN14 PCN13
PCN406
PCN8 PCN6
PCN100
PCN7 PCN5
+
C72
+
C71
DM1
+
C87
L1 1 2 L2
N
CAUT
ION
Check Joint
Rear Cover
Valve Stay
Rear Cover
Check Joint
Valve Stay
3 Open the soundproof cover wrapped around the compressor and re-
move the terminal box cover of the compressor body. Disconnect the
compressor wires in the terminal box and disconnect the thermistor
on top of the compressor. Remove the soundproof cover.
N O T E
Check the terminal codes and mark bands when disconnecting the wi-
res. Connecting wires in wrong order at reassembling may result in com-
pressor damage.
4
Remove the rubber cap and the thermistor attached on top of the
compressor.
5 Remove the crankcase heater.
Wire for Compressor
Closing Nut
Sound-Proof
Cover
Terminal Box Cover
Holder
Thermistor
at Top of Compressor
Sound-Proof Cover
Position of Taking out Thermistor
Holder
Sound-proof Cover
Wire for
compressor
Position of taking out Thermistor
Closing
Nut
Thermistor at top
of Compressor
Sounf-proof
Cover
Terminal Box Cover
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.
6 Remove the suction pipe and discharge pipe from the compressor.
N O T E
Be sure to separate the blazing burner flame sufficiently from the wires and electrical components around the brazed part
in order to avoid burning.
7 Remove 2 nuts which fix the compressor and remove it by lifting it up with inclining forward.
N O T E
To remove the compressor the liquid stop valve pipe should be moved (bent) to the right side hand. PAY CLOSE ATTEN-
TION not to crush to break the pipe.