Hitachi S10mini LQS070 Hardware Manual page 102

8 MAINTENANCE
(3) Are the modules mounted correctly?
Check that no set screws loosen.
(4) Is ground made correctly?
• Separate the grounding from that of
high-voltage equipment.
• Perform grounding work conforming to
Class D grounding or higher.
(5) Are LG and FG separated?
• If electrical noise from the power supply
enters the FG (frame ground) via the LG
(line ground), a malfunction may result.
To prevent this, LG and FG must be
separated.
• Ground the LG at the power supply side.
LG is near here.
FG is over there.
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