Hitachi RAS-(4-6)HVRNS2E - Removing Inverter Components

10 Servicing
398
SMGB0064 rev.0 - 08/2011
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Removing inverter components
1 Remove the service cover according to the section Removing service cover, see on page 372 in this chapter.
2 Open the P-mounting plate by rotating 90 degrees to the left according to the section Opening electrical box (P-moun-
ting plate), see on page 393 in this chapter.
D A N G E R
• Check that the LED201 (red) located on the “W” surface PCB is OFF when opening the P-mounting plate.
• Do not touch the electrical components when LED201 (Red) located on the “W” surface PCB is ON in order to
avoid an electrical shock.
D A N G E R
• Do not touch the electrical parts when LED201 (Red) on the PCB2 is lit to prevent from an electrical shock.
• When replacing the transistor module (IPM) and diode module (DM) on heat radiation n slightly apply the heat
conducting silicon grease (Manufacture: Shin-Etsu Chemical Co. Ltd Product No.: G-746) over the n contact
surface.
• Identify the terminal numbers with mark band. When reassembling the terminals have to be connected to the
correct numbers . If incorrectly connected malfunctions or damages will occur.
• Correctly insert two wires of U and V phases for the power cable of inverter compressor into the current sensor
CTU and CTV on PCB2. Connect Phase U power cable with the current sensor CTU and CTV on PCB2. Connect
the Phase U power cable with the current sensor Phase U (CTU) and Phase V power line with current sensor
Phase V (CTV). If connected incorrectly malfunction or electrical component damage will occur.
• When mounting PCB and the sheet metal part for PCB pay attention not to clamp the electrical wiring together.
• Screws bushes and collars are used for xing inverter PCB. Check to ensure that the bushes and collars are
used for PCB remounting. If not used it may cause malfunction.
• In case of replacing control PCB set all the dip switches as the same position before replacing. If not mal-
function may occur. Refer to the manual attached with the service PCB.
• Do not apply strong force to the electric components and PCBs to avoid damage.
Removing the PCB2
Check to ensure that the LED201 (Red) of the PCB2 is OFF.
After removing the three (3) M3 xing screws remove the bushes and the collars from the PCB2. When reassembling the
components attach those bushes and collars.
1. Middle part of holder.
2. Holder.
3. Collar.
4. PCB3.
5. Bush.
6. Screw (M3).
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