LiteOn EVO 8000 Series, User Manual

Page: 134 / 169

131
Keypad
Display
Fault Name Cause Possible Solution
set to P6-04 for longer
than the time set to
P6-05
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 distributor for more
information.
Uv2 Retain
PF
Input Phase Loss
Drive input power has
a large imbalance of
voltage between
phases or has an open
phase
(Detected when
P7-00=1)
1. Phase loss in the drive input
power
2. Drive input power terminals
has a loose wiring
3. Drive input power voltage
has an excessive fluctuation
4. The main circuit capacitors
are impaired
1. Check wiring for errors in the
main circuit drive input power
»Correct wiring
2. Make sure the terminals are
tightened correctly
»Apply the tightening torque as
showed in the manual
3. Confirm the voltage from the
drive input power
»Apply possible solutions for drive