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

Page: 393 / 498

10 Servicing
379
SMGB0087 rev.0 - 12/2013
10
10.4.9 Opening electrical box (P plate)
1
Remove the service cover following “10.4.1 Removing service cover”
in this chapter.
2 Unplug all the connectors of the electrical box.
3 Remove 5 screws which fix the electrical box and open the P plate
turning counter clockwise approximately 90°.
• Check that the LED201 (red) on the inverter PCB (PCB2) is OFF.
Upper Cover
Power Plate
Fixing Screw
2 Fixing Screws
2 Fixing Screws
Upper cover
Power plate
Fixing
screw
2 Fixing
screws
2 Fixing
screws
10.4.10 Removing Reversing valve coil
1 Remove the service cover, the bottom service cover, the rear cover and
the upper cover following
“10.4.1 Removing service cover” , “10.4.4 Re-
moving the bottom service cover and rear cover” and “10.4.3 Removing
upper cover” . Disconnect the PCN100 connector on the control PCB of
the electrical box.
2 Remove 1 fixing screw to remove the reversing valve coil.
3 When reassembling, perform the procedure in the reverse way of re-
moving.
Reversing valve
Fixing screw for
Reversing valve
N O T E
Fix the wires by plastic bands to the original position.
10.4.11 Removing electronic expansion valve coil
1 Remove the service cover, the bottom service cover
and the rear cover following
“10.4.1 Removing service
cover” and “10.4.4 Removing the bottom service cover
and rear cover” .
2 Disconnect the CN5A connector on the control PCB of
the electrical box.
3 Hold the coil of the expansion valve and pull out upward.
It is easier to remove the expansion valve coil if it is ro-
tated while pulling it upward.
4 When reassembling after replacing the expansion valve
coil, perform the procedure in the reverse way of remo-
ving. The expansion valve coil is equipped with a lock
mechanism. After attaching the expansion valve coil,
rotate it until the sound of locking is heard.
N O T E
Fix the wires by plastic bands to the original position.
Expansion Valve Coil Release Lock
Pull the expansion
valve coil upward
with holding.
Hold the coil of the
expansion valve and
pull out upward
Expansion valve coil Release lock