YASKAWA Varispeed V7 - Page 215

214
Protective
Operation
Output is
turned OFF
and motor
coasts to a
stop.
OC (Overcurrent)
Inverter output current
momentarily exceeded
approx. 250% of rated
current.
• Short circuit or
grounding at Inverter
output side
• Excessive load GD
2
• Extremely rapid
Acceleration/
Deceleration Time
(constants n019 to
n022)
• Special motor used
• Starting motor dur-
ing coasting
• Motor of a capacity
greater than the
Inverter rating has
been started.
• Magnetic contactor
opened/closed at
the Inverter output
side
OL1 (Motor overload)
Motor overload protec-
tion operated by built-in
electronic thermal over-
load relay.
• Check the load size
or V/f pattern setting
(constants n011 to
n017).
• Set the motor rated
current shown on
the nameplate in
constant n036.
OL2 (Inverter overload)
Inverter overload protec-
tion operated by built-in
electronic thermal over-
load relay.
• Check the load size
or V/f pattern setting
(constants n011 to
n017).
• Check the Inverter
capacity.
OL3 (Overtorque detec-
tion)
V/f mode: Inverter output
current exceeded the
preset value in constant
n098.
Vector mode: Motor cur-
rent or torque exceeded
the preset value in con-
stants n097 and n098.
When overtorque is de-
tected, Inverter per-
forms operation
according to the preset
setting of constant n096.
Check the driven ma-
chine and correct the
cause of the fault, or in-
crease the value of con-
stant n098 up to the
highest value allowed for
the machine.
Fault Display Inverter
Status
Description Causes and Correc-
tive Actions
Digital
Operator
RUN (Green)
ALARM (Red)