LiteOn EVO 6800 Series - Page 141

138
Keypad
Display
Fault Name
Cause
Possible Solution
» 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 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. Ensure there is no problem on the
machinery side.
UL
Mechanical Weakening
Detection for Undertorque
Undertorque in the
conditions set to P6-06
Undertorque in the conditions
set to P6-06
Check the condition of mechanical
weakening
Uv1
Undervoltage Detection 1
Voltage in the DC bus fell
below the undervoltage
detection level (P2-03)
during run.
· 200 V class: 190 V
· 400 V class: 380 V
1. Input power phase loss
2. Loose wiring terminals of
drive input power
3. Problem with the voltage
from the drive input power
4. The drive main circuit
capacitors are weakened.
5. The contactor or relay on the
soft-charge bypass circuit is
damaged
1. Correct the drive input power
wiring
2. Tighten the terminals
3. Check the voltage
a. Adjust the voltage according to the
drive input power specifications
b. Check the main circuit magnetic
contactor if there is no problem with
the power supply
4. Turn on and turn off the power to
see if any problem occurs
a. Replace either the entire drive or
the control board if the problem
continues to occur. Contact the local