BENSHAW RSi SG Series, Instruction Manual

Page: 184 / 218

Chapter 7 – Trouble Shooting & Maintenance
7-12
5) Power Component Check – 500 HP ~ 700 HP
Module
Test polarity
Reading Module
Test polarity
Reading
+ -
+
-
Line
Fuses
Fuse 1
R across fuse
Closed
Fuse
Indicators
Fuse 1 across indicator Closed
Fuse 2
S across fuse
Closed Fuse 2
across indicator
Closed
Fuse 3
T across fuse
Closed Fuse 3
across indicator
Closed
These indicators are connected in series.
SCR's SCR1/
SCR2
R P1 (+) Open Diodes D1/
D2
R N (-) Open
P1 (+) R Open N (-) R Closed
SCR3/
SCR4
S P1(+) Open
D3/
D4
S N (-) Open
P1(+) S Open N (-) S Closed
SCR5/
SCR6
T P1(+) Open
D5/
D6
T N (-) Open
P1(+) T Open N (-) T Closed
SCR5/6: Measurement is D7 and Pre-Charge Resistor
IGBT's
Tr1(1a)
U P1(+) Closed
IGBT's
Tr4(4a)
U N (-) Open
P1(+) U Open N (-) U Closed
Tr3(3a)
V P1(+) Closed
Tr6(6a)
V N (-) Open
P1(+) V Open N (-) V Closed
Tr5(5a)
W P1(+) Closed
Tr2(2a)
W N (-) Open
P1(+) W Open N (-) W Closed