LiteOn EVO 6800 Series - Page 134

131
Keypad
Display
Fault Name
Cause
Possible Solution
is usually the output lines from the
drive
Uv
Undervoltage
1.Voltage in the DC bus fell
below the undervoltage
detection level (P2-03)
2.200 V class: 190 V
3.400 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&5. Turn on and turn off the power to
see if any problem occurs
Replace either the entire drive or the
control board if the problem continues
to occur. Contact the local distributor
for more information.
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 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
oL
Mechanical Weakening
Detection for Overtorque
Overtorque in the
conditions set to P6-06
Overtorque in the conditions
set to P6-06
Check the condition of mechanical
weakening
bb
Baseblock
Drive output interrupted by
an external baseblock signal
An external baseblock signal
was input via one of the multi-
function input terminals (S1 to
S7)
Check baseblock signal input timing
and external sequence