Chapter 7 Troubleshooting; T List Of Fault And Alarm Information - V&T E5 Series User Manual

7.T List of Fault and Alarm Information

This chapter lists all the fault and alarm messages including the possible causes and corrective actions,
Once a fault is detected, the following fault code will be displayed on the operation panel, the fault
contact output operates, and the output to motor is disable, the motor will coast to stop. For details, refer
to the following table to identify and correct the cause of the fault.
For damages on units or questions that can't be resolved, please contact with local distributorsTagents,
service centers or manufacturer for solutions.
Fault
Fault
display Fault description
No.
on panel
T E.ocT
T E.ocT
3 E.oc3
4 E.oVT
5 E.oVT
6 E.oV3
7 E.PCU
122
E5 Series High Performance Universal Inverter

Chapter 7 Troubleshooting

Low grid voltage
Start when the motor is spinning
Rotating inertial of load is too large
or shock load is too heavy
Over current
Improper setting motor parameters
during
acceleration
Set start frequency too high
Acceleration time too short
VTF curve setting are not correct
Output power is too small
Low grid voltage
Rotating inertial of load is too large
Over current
during
Improper setting motor parameters
deceleration
Deceleration time is too short
Output power is too small
Sudden load change of during
operation
Over current at
Improper setting motor parameters
constant speed
Output power is too small
Motor short-circuit to ground
Over voltage
during Abnormal input power supply
acceleration
Start when the motor is still rotating
Motor short-circuit to ground
Over voltage
during Rotating inertial of load is too large
deceleration
Deceleration time is too short
Motor short-circuit to ground
Over voltage at
Abnormal input power supply
constant speed
Rotating inertial of load is too large
Interference Severely interfered by exterior
protection signal
Possible causes
Chapter 7 Troubleshooting
User's Manual
Corrective actions
Check input power supply
Restart after the motor at standstill
Increase the acceleration time and
reduce the sudden change of load
Set motor parameters properly
Decrease start frequency
Prolong acceleration time
Adjust VTF setting and torque boost
Replace inverter with higher model
Check input power supply
Choose appropriate dynamic
braking unit and braking resistor
Set motor parameters properly
Prolong deceleration time
Replace inverter with higher model
Decrease load's abrupt frequency
change and amplitude
Set motor parameters properly
Replace inverter with higher model
Check motor wiring
Check input power supply
Restart after the motor at standstill
Check motor wiring
Choose appropriate dynamic
braking unit and braking resistor
Prolong deceleration time
Check motor wiring
Check input power supply
Choose appropriate dynamic
braking unit and braking resistor
Ask professional technicians to
maintain