V&T E5 Series User Manual page 137

Fault
Fault
display Fault description
No.
on panel
Inverter overload
T3 E.oLT
T4 E.oLT
T5 E.oUt
Current detection
T9 E.CUr
T0 E.GdF
Abnormal power
TT E.LVT
TT E.ILF Input power fault
124
E5 Series High Performance Universal Inverter
Input power under voltage
Start when motor is spinning
Keep overloading for a long period
of time
Too short acceleration or
protection
deceleration time
VTF curve setting are not correct
Over load condition
Output power is too small
Input power under voltage
Motor rotation is blocked or load
suddenly changed
Common motor maintains running
under heavy load for a long period
Motor overload
of time
protection
Motor overload protection time is
set too small
VTF curve ratio is set too large
DC braking current is set too high
External terminal fault active
Peripheral
Over voltage stall or over current
protection
stall time lasts for more than one
minute
Current detection circuit failure
fault
Wrong connection
Output short
Motor abnormal
circuited to
Invert module fault
ground
Ground leakage current at the
output side is too large
Mains power fluctuation or
off in running
momentary power failure
status
Abnormal connection, missing
connection or disconnection at the
power supply
Serious imbalance of three phases
power supply
Capacitor aging
Abnormal snubber circuit
Possible causes
Chapter 7 Troubleshooting
User's Manual
Corrective actions
Check input power supply
Start again after the motor at
standstill
Shorten the overloading time and
reduce load
Prolong the acceleration or
deceleration time
Adjust VTF curve setting and torque
boost
Check the load for an over load
condition
Replace with higher model
Check input power supply
Prevent the motor rotation from
blocking and reduce the load
suddenly changed
Replace the common motor with
variable frequency motor or
increase the running frequency
Increase the motor overload
protection time
Adjust VTF curve setting and torque
boost
Reduce the DC braking current
Check the external failure terminal
status
Check whether the external load is
normal
Seek for technical support
Correct the connection error as per
the user manual
Replace the motor after performing
ground insulation test
Seek for technical support
Seek for technical support
Check the mains power supply
Check the power connections as
per the operational regulations and
eliminate the errors of missing
connection and disconnection
Check whether the imbalance of
three phases power comply with
the requirements
Seek for technical support
Seek for technical support