Mitsubishi SRK100VNXWPZSX, Service Manual

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71
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'20 • PAC-SM-351
(ii) Models FDC100VSX-W, 125VSX-W, 140VSX-W
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)
Parts No.
Parts arrangement view
Fig.1 Position of capacitor
TB5
TB6
CNI2
CNR
TB7
TB8
TB9
Voltage measurement parts
JSW11
JSW10
CNW2
CNO1
CNW1
-1 OFF -1 ON
-2 OFF -2 OFF
-3 OFF -3 ON
JSW10
-4 OFF
JSW11
-4 ON
Table. 1 Switch setting
Models FDC100VSX-W, 125VSX-W, 140VSX-W
-1 OFF -1 OFF
-2 -2 OFF
-3 OFF -3
JSW10
-4 OFF
JSW11
-4
Models FDC100VSA, 125VSA, 140VSA
ON
OFF
ON
PCA012D025F
P
LED