Removing The Compressor - Hitachi RAS-2-HVNP Service Manual

10. Servicing
10.3.1.7 Removing the compressor
1 Remove the service cover upper cover bottom service cover and rear cover following
ving upper cover, and Removing bottom service cover and rear
remove the refrigerant piping and move the unit from the wall.
2 Remove the electrical box following
3 Collect the refrigerant from the check joint.
4 Remove the valve stay.
Valve Stay 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 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.
The position of faston terminals should
336
SMGB0079 rev.0 - 01/2013
Removing electrical
Upper Cover
Upper Cover
Rear Cover
Rear Cover
Check Joint
Check Joint
Rear Piping Cover
Rear Piping Cover
Cranckase heater
Crankcase Heater
Sound-Proof Cover
Sound-Proof Cover
Position of Faston Terminal
Position of Faston Terminal
Wire for Thermistor at
Wire for Thermistor
at Top of Compressor
Top of Compressor
U
V W
Discharge Pipe
Discharge Pipe
The position of faston terminals should
be referred to the nameplate attached be referred to the nameplate attached
across terminal box.
across terminal box
cover. When the outdoor unit is installed close to a wall
box.
CN5A CN8 PCN9 PCN8 PCN14 PCN13 PCN7 PCN6 PCN10 PCN5
DSW5 SEG1
ON
LED3 1 2
LED2
DSW1
ON ON
ON
1 2 1 2 3 4 5 6
1 2 3 4
ON ON RSW1 TP1 SW1
0
1 2 3 4 5 6 1 2 3 4 5 6
DSW2 DSW4
IC1
REG1
C72
C87
TR1
+
C71
LED4
PCN100
EF1
R195
PCN1
AS4755 DRM1 SC
CAUTION
Do not connect power supply
L1 L2 1 2 or transmission wiring
N
to DRM1 and SC terminals.
17E26270A
MFG/NO.
Terminal Box Cover
Terminal Box Cover
Removing service cover, Remo-
Check Joint of
Check Joint of
Reversing Valve Piping
Reversing Valve Piping
Check Joint
Check Joint
Valve Stay
Valve Stay
Sound-proof Cover
Sound-proof Cover