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Chapter 6 Troubleshooting
169
Fault
Display
Name of Protection
Possible Cause to Fault
Countermeasure
insulation
OC3
Overcurrent with the
constant-speed operation
Abnormal load
The acceleration or
deceleration time is set to
be too short
The power voltage is low
The frequency inverter
power is too small
The frequency inverter
output load is
short-circuited
Check the load
Increase the acceleration
or deceleration time
appropriately
Check the input power
supply
Select the
frequency-inverter with
the larger power
Check the motor coil
resistance and the motor
insulation
Ou1
Overvoltage with the accelerated
operation
The input voltage is
abnormal
The acceleration time set is
too short
The stalling overvoltage
point is too low
Check the input power
supply; check & test the
electrical level setting
Increase the acceleration
time appropriately
Raise the stalling
overvoltage point
Ou2
Overvoltage with the decelerated
operation
The input voltage is
abnormal
The 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
Ou3
Overvoltage with 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 frequency inverter
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
Содержание 6000S series
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