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

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10 Servicing
365
SMGB0087 rev.0 - 12/2013
10
10.3.7 Removing the compressor
1 Remove the service cover, upper cover, bottom service cover and rear cover following “10.3.1 Removing service co-
ver”, “10.3.3 Removing upper cover” , and “10.3.4 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 “10.3.6 Removing electrical box” .
3 Collect the refrigerant from the check joint.
4 Remove the valve stay.
Upper Cover
Rear Cover
Check Joint
Rear Piping Cover
Crankcase Heater
Valve Stay Valve Stay
Rear Cover
Upper Cover
Check Joint
Rear Piping Cover
Crankcase heater
MFG/NO.
CAUTIO
N
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
CN100
CN1
CN
6
C
N7
CN10
1
CN404
CN
2
CN8 CN5A
CN405
CN40
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
Check Joint of
Reversing Valve Piping
Check Joint
Valve Stay
Sound-proof Cover
Valve Stay
Check Joint
Sound-proof Cover
Check Joint of
Reversing Valve Piping
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 remove the thermistor on top of the compressor. Re-
move the soundproof 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 damage.
Sound-Proof Cover
Terminal Box Cover
Discharge Pipe
U
W V
Position of Faston Terminal
Wire for Thermistor
at Top of Compressor
The position of faston terminals should
be referred to the nameplate attached
across terminal box.
Terminal Box Cover
Sound-Proof Cover
Position of Faston Terminal
Discharge Pipe
Wire for Thermistor at
Top of Compressor
The position of faston terminals should
be referred to the nameplate attached
across terminal box
6
Remove the crankcase heater.
7 Remove the suction pipe and discharge pipe from the compressor. Remove the brazed part after cutting the pipes at
“A” by a pipe cutter.