LiteOn EVO 6800 Series - Page 216

216
Keypad
Display
Fault Name
Cause
Possible Solution
oL2
Drive Overload
1. The load is too heavy
2. The acceleration and
deceleration times are too
short
3. The voltage determined
by the V/F is too high
4. The drive capacity is too
small
5. The motor is driven
below the rated speed with
a high load
6. Torque compensation is
too high
7. Speed Search related
parameters are set
incorrectly
8. Power supply phase loss
causes output current
oscillation
1. Check loading capacity
» Reduce the load
2. Confirm acceleration and
deceleration times
»Increase C1-00 to C1-07
parameter settings
3. Adjust d1-02 to d1-11 settings
(V/F Characteristics)
Note: If d1-02 to d1-11 settings
are too low, load tolerance at low
speeds will be reduced
4. Use a larger drive
5. »Reduce the load at low speed
» Use a larger drive
» Set a lower value to C6-00
(Carrier Frequency)
6. Check the torque
compensation
» Set a lower value to C3-00
(Torque Compensation Gain)
until the current is decreased
and the motor does not stall.
7. Adjust parameters related to
Speed Search
» Adjust b3-01 (Speed Search
Operation Current)
8. Check the power supply for
phase loss
ot1
Overtorque Detection 1
The current has
exceeded the torque
level set to P6-01 for
longer than the time set
to P6-02
1. Incorrect parameter
settings
2. Malfunction on the
machinery side
1. Reset P6-01 and P6-02
2. Check machinery and load
status
Ut1
Undertorque Detection
1
The current has
dropped below the
torque detection level
1. Incorrect parameter
settings
2.Malfunction on the
machinery side
1. Reset P6-01 and P6-02
2. Ensure there is no problem on
the machinery side.