Mitsubishi Heavy Industries SRK100VNXPZSX Technical Manual page 98

(ii) Models FDC100VSX, 125VSX, 140VSX
100VS, 125VS, 140VS
1) Replace the PCB after elapsing 3 minutes from power OFF.
(Be sure to measure voltage (DC) on both capacitor terminals located in control back, and check that the
voltage is discharged sufficiently.(Refer to Fig.1))
2) 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 control's radiation heat fins.
3) Match the setting switches (JSW10,11) of new PCB with the former PCB.
4) 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.
5) 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
torque:0.98-1.47N∙m)
CNO1
CNW1
TB6
TB5
TB9
TB8
TB7
Parts arrangement view
Parts No.
CNW2
CNI2
Models FDC100VSX, 125VSX, 140VSX
JSW10
Models FDC100VS, 125VS, 140VS
JSW10
CNR
JSW11
JSW10
Fig.1 Position of capacitor
Table. 1 Switch setting
-1 OFF
-2 OFF
JSW11
-3 OFF
-4 OFF
-1 OFF
ON
-2
JSW11
-3 OFF
-4 OFF
97
- -
'17 • PAC-T-257
PCA012D025F
P
Voltage measurement parts
-1 ON
-2 OFF
-3 ON
-4 ON
-1 OFF
-2 OFF
-3 ON
-4 OFF