Function
Description Remarks
Brake resistor
If regenerative brake energy from motor Prolong deceleration
overheat exceeds the specified value, the brake
time or change
protection operation is stopped to protect the
operati-on sequence
brake resistor .from overheating.
to reduce. braking
duty.
When the brake resistor is cooled, the
brake operation restarts automatically.
Ground fault If ground fault occurs on the inverter Check if ground
current protectior output side (load side) and ground fault
fault occurs on the
(GF)
_ current flows, the inverter output is
load side (motor
shut off.
power circuit) .
After removal of
the cause, restart
operation.
External thermal If externallyinstalled thermal relay for
relay trip protection of motor from overheat
(OHT)
(or motor built-in thermal relay) is
activated (relay contact is opened) , the
inverter output is shut off and held
shut off.
This function is applicable when
Examine load and
motor duty to
determine the cause
of overheat.
,“external thermal signal input” function
is selected. (FUNCTION 46)
Built-in option When an inverter built-in option unit Check connection
unit connection is used and not connected properly (connector engage-
failure
(misengagement
of conector, for example) , men0 of option unit.
(OPT)
the inverter is shut off.
_’
0
0
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