Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 270

3) Model FDC100VS, 125VS,
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 .(Refer to Fig.2))
b) Take off the connection of inverter PCB terminal block connector and remove the screw of power transistor then
remove the PCB. Wipe off the silicon grease neatly on the controller's radiation heat fins.
c) Refer to table1 for the setting of switch (JSW10,11) of new PCB.
d) Before installing the power transistor on the new PCB, Apply uniformly a bundled of silicon grease first on the
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
clearance gap.Power transistor can be damage if not properly tighten.(Recommended power transistor tightening
torque:0.98~1.47N∙m)
CNO1
CNW1
Terminal
b lock
TB6
TB5
TB9
TB8
TB7
Fig.1 Parts arrangement view
JSW10
140VS
Parts No.
CNW2
Connector
Table. 1 Switch setting
-1 OFF
-2 OFF
-3 OFF
-4 OFF
CNR
CNI2
Switch
JSW11
JSW10
JSW11
261
– –
Voltage measurement parts
Fig.2 Position of capacitor
-1 OFF
-2 ON
-3 OFF
-4 ON