Hitachi RAS-4-HNCE - Removing the Compressor

10. Servicing
336
SMGB0079 rev.0 - 01/2013
10.3.1.7 Removing the compressor
1 Remove the service cover upper cover bottom service cover and rear cover following Removing service cover, Remo-
ving upper cover, and 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 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
Cranckase heater
MFG/NO.
CAUTION
to DRM1 and SC terminals.
or transmission wiring
Do not connect power supply
17E26270A
CAUTION
SCAS4755 DRM1
PCN1
TR1
IC1
SEG1
1 62 5
ON
3 4
1
ON
2 43
1 62 5
ON
3 41 62 5
ON
3 4
ON
21
ON
21
PSW1 PSW3
0
9
8
7
6
5
4
3
2
1
SW1
DSW3
R195
REG1
E
Y20C Y20A
Y21
Y52C
YCH
Y21SW1
Y21SW2-1
Y21SW2-2
LED3
LED2
PSW2
DSW6
RSW1
DSW1
DSW5
DSW2 DSW4
LED4
LED1
EFS1
EFR1
EF1
EF2
EF3
THM9THM10 THM7THM8
CN100
CN1 CN6 CN7
CN101
CN404
CN2
CN8CN5A
CN405 CN406
CN10
PCN9
TP1
SK1
PCN10PCN14 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
WV
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