SECTION 11:
ADVANCED TROUBLESHOOTING – POWER SOURCE
The following tables are guides for analysing problems and making repairs to the Power Source.
11.01 Recommendations when Replacing Primary Bridge Rectifier / IGBT /
Secondary Diode
IGBT Recommendations
(Q4, Q1, Q3, Q2)
Bridge Rectifier
Recommendations (B1)
DIODE Recommendations
(D5, D4, D14, D2, D1)
• If one IGBT fails then all IGBTs
should be replaced.
• The Control PCB normally does
not need to be replaced if the
IGBTs fail.
• If bridge rectifier fails then
the Inverter PCB should be
replaced.
• If one diode fails then the all
diodes should be replaced.
• The Inverter PCB should
operate after the diodes are
replaced.
Type:
IKW50N65H5
Vce: 650V
Ic: 50A
Type:
BR6010-7
Vr: 1000V
If: 60A
Type:
MM60F060PC
Vr: 600V
If: 60A per
package
Table 11-1 Recommendations when replacing Primary Bridge Rectifier / IGBT / Secondary Diode
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