Fujitsu AUXB04GALH Service Manual page 244

5-2. INVERTER PCB removal
Screw
(To Power PCB)
Remove the 4 mounting screws.
For screws of IPM.
Note the tightening torque at the installation.
-
Temporary tightening : 0.2 to 0.4N m
-
Final tightening
For screws of Comp. Wire.
Note the tightening torque at the installation.
Tightening torque is as follows.
- Final tightening : 1.4 to 1.6 N m
IPM
5-3. DIODE BRIDGE removal
Remove the wires.
Screws
(For IPM)
Screws
(For Comp. Wire)
: 0.98 to 1.47N m
Spread the heat transfer compound on IPM
when you exchange INVERTER PCB by the repair.
Note at the installation.
1. Remove the old heat transfer compound as possible from IPM and
2. Spread the heat transfer c
3. Prevent foreign matter from attaching to the surface of IPM and Diode Bridges.
Remove the screws.
For screws of D.B. .
Note the tightening torque at the installation.
Tightening torque is as follows.
- Temporary tightening : 0.6 +0.1N m
- Final tightening : 2.4 +0.1N m
06-04
Remove the connectors and spacers.
Diode Bridges when you exchange INVERTER PCB by the repair. o
mpound evenly on IPM and Diode Bridges.
Specifications for the heat transfer compound
- Manufacturer : Shin-Etsu Chemical Co.,Ltd
- Grade : G746
Screws
Spread the heat transfer compound on D.B.
when you exchange D.B. by the repair.
Note at the installation.
1. Remove the old heat transfer compound as possible from
D.B. when you exchange ACTPM by the repair.
2. Spread the heat transfer compound evenly on D.B. .
3. Prevent foreign matter from attaching to the surface of D.B. .
Specifications for the heat transfer compound
- Manufacturer : Shin-Etsu Chemical Co.,Ltd
- Grade
Spacers
: G746