Veikong VFD500 Series User Manual page 128

VFD500 high performance vector control frequency inverter user manual
Fault
Fault Name
code
Er.Lv1
Low voltage 8
Contactor
9
open
Frequency
inverter 10
overload
Possible Causes
Display
1: Instantaneous power failure
occurs
on the input power supply or input
phase loss
2: The frequency inverter's input
voltage is not within the allowable
range.
3: Cut off the power during
operation
4:the internal wiring of the inverter
is loose, or the hardware is bad.
1: Instantaneous power failure
occurs
on the input power supply
2: The frequency inverter's input
Er.Lv2 voltage is not within the allowable
range.
3: Cut off the power during
operation
4:the internal wiring of the inverter
is loose, or the hardware is bad.
1:The load is too large or the motor
is blocked.
2:The large inertia load
acceleration and deceleration time
is too short
Er. Ol
3: When the VF is controlled, the
torque boost or V/F curve is not
suitable.
4:The frequency converter
selection is too small
5:Overload at low speed operation
Chapter6 Fault diagnosis and solutions
1:Check if the input power supply
is abnormal, whether the input
power terminal is loose, whether
the input contactor or the air
switch is abnormal.
2:adjust the voltage to the
normal range
3:Power off after the inverter
stops
4:seeking technical support
5: For the unstable power
supply, if the performance
requirements are low, try to
enable the undervoltage stall
function (P23.00).
1:Check if the input power supply
is abnormal, whether the input
power terminal is loose, whether
the input contactor or the air
switch is abnormal.
2:adjust the voltage to the
normal range
3:Power off after the inverter
stops
4:seeking technical support
5: For the unstable power supply,
if the performance requirements
are low, try to enable the
undervoltage
(P23.00).
1. Reduce the load and check
the motor and mechanical
conditions.
2, increase the acceleration and
deceleration time
3. Adjust the torque boost or V/F
curve
4, select the inverter with a larger
power level
5. Perform motor self-learning in
cold state and reduce carrier
frequency at low speed
- 126-
Solutions
stall function