YASKAWA VS MINI J7 series, Instruction Manual

Page: 108 / 118

108
Protective
Operation
Output is shut
OFF and motor
coasts to a
stop.
OH (Cooling fin overheat)
Temperature rise because of
inverter overload operation or
intake air temperature rise. • Excessive load
• Improper V/f pattern
setting
• Insufficient axel time
if the fault occurs
during acceleration.
• Intake air
temperature
exceeding 122
°
F
(50
°
C)
• Calling fan stops
⇓
Check the following:
• Load size
• V/f pattern setting
(parameters n11 to
n17)
• Intake air
temperature
OL1 (Motor overload)
Motor overload protection
operates by built-in electronic
thermal overload relay. • Check the load size
or V/f pattern setting
(parameters n09 to
n15)
• Set the motor rated
current shown on the
nameplate by
parameter n36.
OL2 (Inverter overload)
Inverter overload protection
operates by built-in electronic
thermal overload relay. • Check the load size
or V/f pattern setting
(parameters n09 to
n15)
• Check the inverter
capacity.
OL3 (Over torque detection)
Inverter output current
exceeded the preset value in
parameter n60.
When over torque is detected,
inverter performs operation
according to the preset setting
of parameter n59.
Check the driven
machine and correct
the cause of the fault,
or increase the value of
parameter n60 up to
the highest value
allowed for the
machine.
Alarm Display
Inverter
Status
Explanation
Causes and
Corrective Actions
Digital
Operator
RUN ALARM
(Green) (Red)
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