BENSHAW RSi-030-SG-4B, Service Manual

Page: 96 / 116

Pub # 890046-10-00
Dec. 2015
Section 4, Page
14
of
32
2. Check PC Board Connections
a) Power Down.
b) Remove upper cover of VFD.
c) Below is a picture of the internal PC Boards (Control Bd. And Main SMPS).
d) LEM Feedback / DC Power connectors are in the upper left of the Main SMPS
board. Push in, wiggle. Possible intermittent connection of current feedback.
e) IGBT firing connectors along bottom of board. Same routine.
f) Start VFD. Monitor output current. Clamp on, etc.