Lincoln Electric INVERTEC SVM101-B - Manual (Page 91)

V300-I
TROUBLESHOOTING & REPAIR
PROCEDURE (Diode Modules)
1. Turn main power OFF.
2. Perform Input Filter Capacitor Discharge proce-
dure detailed in Maintenance section..
3. Detach and remove both Switch Board assemblies
and attached capacitors. See Switch Board
Removal and Replacement procedure
4. Detach the fan shroud to gain access to the diode
heat sink and mounting bracket. When the fan
shroud is lifted, the tabs securing the heat sink
mounting bracket will release.
5. Move the diode heat sink and mounting bracket
away from the Case Back.
6. Disconnect the leads from the defective Module and
remove the module from the heat sink.
7. Mount the new module and re-connect the leads.
IMPORTANT: The replacement module will come
with an instruction sheet that addresses surface
preparation, torque values and hardware changes.
Failure to follow these instructions may result in
subsequent breakdown.
8. Reassemble the unit being careful to use all of the.
insulating materials. Also make certain to replace
all disconnected leads in their proper location.
Failure to do so may result in machine damage
when the power is applied.
9. Perform the Test After Switch Board or Capacitor
Replacement.
F-61 F-61
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OUTPUT DIODE REPLACEMENT PROCEDURE (cont.)
FIGURE F.32 - RECTIFIER ASSEMBLY WITH DIODE MODULES