Hitachi LQZ700, User Manual

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5 MAINTENANCE
5-5
(2) Is the cabling correctly?
Check cables for disconnection or incorrect connection.
(3) Are the modules mounted correctly?
Check if the SYS SW module is mounted at
the correct position or if any setscrew is not
loose.
(4) Is grounding correctly?
• Do not ground the SYS SW module in the
same place where high-voltage equipment is
grounded. They must be grounded in
separate places.
• Perform grounding work conforming to Class
D grounding or higher.
(5) Are LG and FG separated?
• Be sure to separate the LG from the FG or
vice versa because power noise enters the
FG via the LG. Failure to observe this rule
may result in an equipment malfunction.
• Ground the LG at the power supply side.
LG is here.
FG is over there.