3-1
3 Operation
3-1 Inspection and preparation before operation
Inspect the following items before operation
① Check that the connection is correct.
In particular, check the following points:
a. Check that the AC power supply is not connected to
any of DC link circuit terminals P(+) and N(-) or
connection terminals for braking resistor P(+)R and DB.
b. Check that the DC link circuit voltage is not connected
to the connection terminals for braking resistor P(+)R
and DB.
c. Check that the grounding terminal is securely
grounded.
② Check for short-circuits and ground faults between the
terminals and live sections.
③ Check for loose terminals, connectors, or screws.
Check the followings after power-on.
① Check that no external alarm message is displayed on the inverter.
② Check that the CHARGE lamp is turned off.
③ Check that the fans are rotating (when using option fans).
WARNING
• Be sure to put on the front cover before turning on the power (close). Never
remove the cover while the power is applied to the inverter.
Electric shock may result.
G, P(+), N(-), P(+)R, DB
P(+)
N(-)
P
DB
DB unit
Fig. 3-1-1 DB unit connection diagram
Inverter
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