Hitachi IR.LINK User Manual page 92

Are the modules mounted correctly?
• Check that the IR.LINK module is left-justified with no idle slot between the modules.
• Check that no set screws loosen.
Is grounding correctly?
• Do not ground the IR.LINK
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.
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!
6-7
6 MAINTENANCE