Mitsubishi Heavy Industries FDT Series Technical Manual page 353

2) Model FDC100VNX, 125VNX, 140VNX
a) Replace the PCB after elapsing 3 minutes from power OFF.
(Be sure to measure voltage (DC) on both capacitor terminals located in controller back, and check that the
voltage is discharged sufficiently
b) Take off the connection of inverter PCB terminal block connector and remove the screw of power transistor then
c) Match the setting switches (JSW10,11) of new PCB with the former PCB.
surface of power transistor.Make sure it is applied to prevent damage on power transistor.
e) Tighten the screw of power transistor on inverter PCB and connect the terminal block.Confirm the connection
and don't use soldering in the connection.Tighten properly the power transistor with a screw and make sure there
is no slack.Power transistor can be damage if not properly tighten.(Recommended power transistor tightening
Terminal block
TB1
TB2
TB6
TB5
TB7
TB8
TB9
Parts arrangement view
Parts No.
PCA565A151-1
CNACT1
Table. 1 Switch setting
-1
-2
JSW10
-3
-4
Terminal block
TB10
TB11
Connector
CNI2
CNI4
Switch
JSW11
JSW10
Fig.1 Position of capacitor
OFF
OFF
JSW11
OFF
OFF
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'12 • PAC-T-173
PCA012D025D
Voltage measurement parts
-1 OFF
-2 OFF
-3 ON
-4 ON
F