Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 269

2) Model FDC100VN, 125VN,
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)
Terminal bloc k
TB1
TB2
TB6
TB5
TB7
TB8
TB9
Fig.1 Parts arrangement view
140VN
Parts No.
PCA565A151-1
CNACT1
-1
-2
JSW10
-3
-4
Terminal block
TB10
TB11
Connector
CNI2
CNI4
Switch
JSW11
JSW10
Table. 1 Switch setting
OFF
OFF
JSW11
OFF
OFF
260
– –
Voltage measurement parts
Fig.2 Position of capacitor
-1 ON
-2 OFF
-3 OFF
-4 ON