Emotron VSC 48-009 Serie Guia De Inicio Rapido página 79

Errors which can be recovered manually and automatically
Display Error
OC-S Over-current
at start
Over-current
OC-D
at decelera-
tion
Over-current
OC-A
at accelera-
tion
OC-C Over-current
at fixed speed
Voltage too
OV-C high during
operation/
deceleration
Err4
Illegal CPU
interruption
78 Troubleshooting and maintenance
Cause
The motor wind and enclosure
short circuit
The motor contacts and earth
short circuit
The IGBT module is damaged
The preset deceleration time is
too short.
1. Acceleration time too short
2. The capacity of the motor is
higher than the capacity of the
VSD
3. Short circuit between
the motor coil and the shell
4. Short circuit between
motor wiring and earth
5. IGBT module is damaged
1. Transient load change
2. Transient power change
1. Deceleration time setting too
short or large load inertia
2. Power voltage varies widely
Outside noise interference
Remedy
Inspect the motor
Inspect the wire
Replace the transistor module
Set a longer deceleration time
1. Set a longer acceleration time
2. Replace with an VSD of the
same capacity as the motor
3. Check the motor
4. Check the wiring
5. Replace the IGBT module
1.Increase the capacity of the
VSD
2. Rerun parameter autotuning
(0-06 = 1)
3. Reduce stator resistance (14-
0) if the above remedies are
helpless
1. Set a longer deceleration
time
2. Add a brake resistor or brake
module
3. Add a reactor at the power
input side
4. Increase VSD capacity
Send back to be repaired if it
happens repeatedly
Emotron AB 01-3990-11r3