Chapter 6 Troubleshooting
64
Fault
Display
Name of Protection
Possible Cause to Fault
Countermeasure
Ou3
Overvoltage during
the constant-speed
operation
The input voltage is
abnormal
The acceleration or
deceleration time is too
short
The load inertia torque
is large
The stalling
overvoltage point is
too low
Check the input power
supply; check & test
the electrical level
setting
Increase the
deceleration time
appropriately
Add the appropriate
brake components
additionally
Raise the stalling
overvoltage point
GF Output
earthing
The output earthing
current exceeds the
specified value
Check whether the
motor insulation has
become poor
Check whether the
connection line
between the driver and
the motor is damaged
OH1
Heat radiator
overheating
The environment
temperature is too high
The air duct is blocked
The fan works
abnormally/ is
damaged
Reduce the
environment
temperature
Clear the air duct
Replace the fan
OL1 Motor
overloaded
The driver output
exceeds the motor
overload value
The V/F curve is
inappropriate
The power grid voltage
is too low
The ordinary motor
operates at the low
speed and with the
large load for a long
time
The motor stalls or the
load becomes too large
suddenly
Reduce the load
Adjust the V/F curve
and the torque boost
Check the power grid
voltage
Select the special
motor
Check the load
Summary of Contents for AS600M Series
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