Removing Other Electrical Components - Hitachi RAS-2-HVNP Service Manual

10. Servicing
10.3.4.14 Removing other electrical components
1 Remove the service cover following
2 Open the P plate turning counter clockwise approximately 90° following
• Check that the LED201 (red) on Inverter is OFF when the P plate is opened.
D A N G E R
DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the
LED turns off.
Capacitors
1 Remove all the wiring connected to the capacitors.
N O T E
The wires have polar characters. Identify the wire mark
band and the indication on the capacitor when connecting
wires.
2 Remove 2 screws fixing the capacitors.
CMC
1 Remove all the wiring connected to CMC.
2 Remove 3 screws fixing the CMC.
Reactor
1 Remove 4 screws fixing the reactor.
Noise filter
1 Remove all the wiring connected to the noise filter.
2 Hold the upper part of the 6 holders with the long nose pliers
and remove the noise filter.
N O T E
• To connect wiring at reassembling, ensure that the terminal numbers and wiring mark band codes are mat-
ched. If connections are wrong, there is the possibility of wrong operation and to cause damage to electrical
parts.
• From the Power Wires (U Phase, V Phase, W Phase) of Inverter Compressor (MC1), please make sure that the
2 wires of U Phase and V Phase pass through the current sensors (CTU • CTV) of Inverter PCB (PWB3). Also
make sure that the Power Wire of U Phase is connected to the U Phase side of current sensor (CTU), and that
V Phase is connected to the V Phase side of current sensor (CTV). If the combination is wrong, it could be a
cause of wrong operation and damage.
• hen attaching the PCB, or when attaching the parts attached to the PCB, pay attention not to clamp any wiring
between plates or electrical components.
• Screws, Bushes and Collars are used to fix the Inverter PCB. Please use Bushes and Collars without fault when
attaching the Inverter PCB. Failure to do so may cause wrong operation.
• When replacing the Control PCB, please set the Dip Switches with the same configuration as the PCB before
replacement. Wrong settings may cause wrong operation. Also, please confirm the replacement instructions
supplied with the PCB sold as a service part.
• Do not apply too much force to the electrical parts mounted on the PCB or to the PCB itself. It may cause failure
of the PCB.
390
SMGB0079 rev.0 - 01/2013
Removing service cover
Long nose pliers
Long-Nose Pliers
Noise filter
Noise Filter
Holder
Holder
in this chapter.
Opening electrical box (P
CMC
Fuse
Noise filter
plate).
Diode module Reactor
Inverter PCB
Capacitor